International Journal of Current Research and Review
ISSN: 2231-2196 (Print)ISSN: 0975-5241 (Online)
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IJCRR - 14(1), January, 2022

Pages: 71-80

Date of Publication: 03-Jan-2022

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The Potential Role of Carotenoid Pigment Isolated from a New Rhodotorula Species in Ameliorating Cerebral Ischemic Stroke Experimentally

Author: Neveen A Salem, Ghada S Ibrahim, Shaimaa El Shebiney, Mostafa M. Abo Elsoud

Category: Healthcare

Abstract:Abstract Objectives: Natural antioxidants particularly carotenoids have been associated with a lowered risk for stroke and cerebrovascular diseases. The present study proposes a new microbial source of carotenoid-rich bio-pigment and investigates its potency in mitigating ischemic stroke in an animal model. Methods: A yeast isolate rich in carotenoid pigment was defined morphologically and physiologically, recognized by 18S rDNA as Rhodotorula mucilaginosa G20with a similarity of 100%, then submitted to Gen Bank (accession number KY271337.1). The extracted pigment was analyzed using high-performance liquid chromatography invitro. Furthermore, an in-vivo rat model was assessed to investigate the effect of the extracted pigment against Endothelin-1 (ET-1) induced focal cerebral ischemia. Rats were assigned into four groups: Group (1) normal control rats received saline. Group (2): sham-operated rats received saline, Group (3): rats received ET-1.Group (4): rats received extracted pigment and ET. Results: HPLC results revealed that the extracted yeast pigment consists mainly of neoxanthin and \?-carotene. Invivo, pretreatment with extracted pigment significantly enhanced the grip strength, restored impaired vertical forelimb use induced by ET-1 in rats, halted oxidants biomarkers, and triggered antioxidant mediators. Moreover, it suppressed inflammatory and apoptotic markers. The histological and structural deterioration in the ventral subiculum was deterred. Conclusions: Based on these encouraging results, The extracted microbial carotenoid pigment production can be considered efficient and economical and proves to be a promising approach for ameliorating cerebral ischemic injuries.

Keywords: Carotenoid, Endothelin, Neoxanthin, Oxidative Stress, Rhodotorula, Stroke

Full Text:


Many synthetic coloring agents were banned by the U.S. Food and Drug Administration (FDA) and the European Food Standards Authority (EFSA) due to their toxicological problems and carcinogenicity. Efforts were made to produce natural pigments not only for their role in industries like cosmetics, food, textile, and plastic but also in medical uses for their antioxidant, anti-inflammatory, anticancer, and anti-microbial activities.1 Micro-organisms are a promising natural color source besides; they are versatile tools in biotechnology. Many bio-pigments were produced using microorganisms including carotenoids, melanins, flavins, or quinines.2 Carotenoids are the most prevalent natural pigment with many significant biological activities and manufacturing applications.3 A growing interest in this class of pigments is directing the search for new.4Rhodotorula sp., Blakeslea trispora, Phaffia sp. Streptomyces chrestomyceticus, Flavobacterium sp, and Phycomyces blakesleeanus are acknowledged for producing carotenoids.5 Rhodotorula yeast strains are efficient in utilizing the whole biomass and produce a high yield of carotenoids.6 The pharmacological value of carotenoids in many diseases involving cardio- and cerebrovascular diseases is due to their  lipid-soluble anti-oxidant nature .7

Stroke is a major cerebrovascular disorder leading to acquired adult disability and death.8Only a minority of patients suffering from acute ischemic stroke benefit from thrombolytic intervention with recombinant tissue plasminogen activator since it must be taken within the first 5 hours of ischemic injury onset.9 Stroke mostly results in dysfunction with a permanent or reversible neurological deficit.9 Infiltration of inflammatory cells, oxidative molecules, excitotoxicity, and apoptotic mediators through the ischemia-impaired blood-brain barrier lead to lesion progression and eventual neuronal cell death.10 Dietary intake of antioxidants is considered a modifiable risk factor that can reduce the severity of injury after an ischemic stroke. 11 Neuroprotective treatments during or following exposure to ischemic stroke interrupt the cellular, biochemical, and metabolic elaboration of injury and ameliorate brain injury.12 Severalstudies revealed the beneficial capability of carotenoids such as α- and β-carotene, zeaxanthin, lycopene, and lutein on suppression of stroke risk.13

The present study utilized Rhodotorula species for the production of carotenoid-rich pigment which can be applied in clinical therapeutics. The produced pigment was investigated biologically for its neuroprotective impact on the brain ischemic injury rat model. Focal injection of endothelin (ET)-1 is considered a reproducible model of ischemic stroke.14 Modulating therapeutic effects were investigated behaviorally, biochemically, and histopathologically.

Materials and Methods


Endothelin-1 powder ≥97%  was obtained from Sigma-Aldrich,(St. Louis, MO, USA) (Lot#102M4762V). Ketamine, xylazine, astaxanthin, α- and β-Carotene, lycopene were purchased from (Sigma-Aldrich Fine Chemicals) (Zeaxanthin, Violaxanthin, Antheraxanthin, Neoxanthin) were obtained from Fluka (Buchs SG, Switzerland

Isolation and identification of carotenogenic yeast

The isolated yeast strain that produces carotenoid, was isolated from the surface of cold yogurt by the particle plating method. The isolated yeast was identified by determining its morphological properties. 15  Also, The produced pigments and shape of colonies of yeast were examined.

Yeast biomass was collected from grown YPD cultures. One ml of broth was centrifuged at 10,000 rpm for 10 min. DNA was extracted using a DNA extraction Kit and its quality was evaluated on 1.2 % agarose gel where a single band of high Mw DNA was observed. The extracted DNA was used as a template for phylogenetic analysis. The 18S rDNA gene was PCR-amplified using ITS1 primer(5'-TCCGTAGGTGAACCTGCGG-3') and ITS4 primer (5'-TCCTCCGCTTATTGATATGC-3') . Then, partial sequencing was performed at Macrogen Company, Korea. Nucleotides sequences were compared with the GenBank database ( by using the BLASTN program followed by a sequence alignment. A phylogenetic tree was constructed using the Neighbor-Joining algorithm version 5.2 of Molecular Evolutionary Genetics Analysis (MEGA) and 1,000 re-samplings. 16,17

Production of carotenoid-rich pigment

Carotenoids were produced using yeast malt broth medium with the following ingredients: yeast extract, 3 g/L; malt extract, 3 g/l; peptone, 5 g/l, glucose 10 g/lat pH 5. The medium was sterilized at 121°C for 20 minutes. The production of cell biomass was performed in three successive steps. Firstly, 500ml of yeast malt broth medium was inoculated with yeast cells (OD 0.5 at 610 nm) and incubated for 5 days at 30°C and 160 rpm. At the end of the incubation period, the entire 500ml production medium was added to 4.5L of yeast malt broth medium and incubated under the same conditions. Finally, a total of 5L was used for inoculation of 45L of sterile yeast malt broth medium in a 75L total volume bioreactor. The culture was incubated at 30°C for 5 days with aeration at 0.2 v/v/m and 200 rpm agitation speed .18

Extraction of bio-pigment

Yeast cells were harvested by continuous centrifugation using CEPA continuous centrifuge. The cells harvested from the 50L production medium were hydrolyzed with (1N) HCl for one and half hours in a water bath at 70°C. Excess acid-washed away with water and then cells get immersed in acetone: methanol (1:1) overnight. The pigment was extracted from the cells using acetone until all color was removed. The extract of acetone was allowed to dry out in the air.                   

HPLC analysis of carotenoids extract

Extracted carotenoids were dried and concentrated under nitrogen and re-dissolved in methanol. 10 µL of the carotenoid extract was analyzed using reversed-phase HPLC (C18; 25 cm×4.6 mm, 5 μm) and isocratic mobile phase composed of (dichloromethane: acetonitrile: methanol) (20:70:10, v) at a flow rate of 1.0 ml/min. Beak recognition and λ max values of these components were accepted by their retention times and standard chromatogram characteristic spectra put down with a Shimadzu SPD-10AVP photodiode array detector (Shimadzu, Japan) the spectra were recorded from 400-600 nm scan range.19 The mass spectra were obtained using 130oC heated source APCI, and the probe was held at 500oC. The voltages were optimized for corona (5 kV), HV lens (0.5 kV), and cone (30 V). At 100 and 300 L/h, respectively, nitrogen was used as a sheet and drying gas. In positive mode, the spectrometer was calibrated, and [M+H]+ ions were captured. Mass spectra of carotenoids with m / z 400-700 were acquired and verified with respective standards.


            40 adult female Wistar rats weighing 160±20g (NRC, Egypt) were used in this study. Rats were kept in plastic wire–meshed rodent cages and maintained under standard conditions of humidity, temperature (23 ± 3°C), and light/dark cycle (12/12 h). Rodent chow diet and water were allowed ad libitum. Experiments were carried out following the instructions of the Ethical Committee of National Research Center, Egypt, which are in accordance with the National Institutes of Health Guide for Care and Use of Laboratory Animals recommendations (NIH Publications No. 8023, revised 1978).

Experimental design

Animals were assigned into 4 groups (n=10) .Group 1(normal control group) rats received saline (1 ml/kg, i.p/ day for 14 days ), Group 2 (sham group) rats received saline (1mg/kg ,ip/day for  14 days ) followed by saline  intracerebroventriculary (4 μl, ICV ,once) . Group 3 (Induced group) rats received saline (1mg/kg ,ip/ day for 14 days ) followed by ET-1 (4 μl, ICV , once ). Group 4 (bio pigment group) rats were pretreated with carotenoid extract (50 mg/kg, i.p./day for  14 days) followed by  ET-1 administration. 

Twenty four hours after ET injection, rats were behaviorally examined for grip strength and activity in cylinder test. Then rats were euthanized, decapitated and brains were harvested and hippocampi were dissected for biochemical and histological examination.

Endothelin-1 (ET-1) induced cerebral ischemia

All rats were anesthetized with a ketamine/xylazine cocktail (1 ml/kg,i.p.).The skin above the skull was sterilized using a 5% povidone-iodine solution. Each rat was mounted on stereotaxic apparatus (Kopf Instruments, Tujunga, CA). At midline, an incision was made to expose the skull. A hole was drilled above the intended lesion site through the skull using a dental burr. The coordinates for the injection were determined based on the rat brain atlas 20 AP-2.7mm, ML +?3.2mm, and DV -3.1mm. (4 μl) 100 pmol/l of ET-1 solution in sterile saline, at the rate of 0.5 μl per minute was delivered. A 10 µl Hamilton syringe was lowered into place and allowed to remain undisturbed. In sham control animals, saline solution was applied instead of ET-1 solution and the same procedures were followed.

Neurobehavioral  assessment :

At the end of the experimental period, motor behavioral impairment for all rats was assessed using the wire hanging test and the cylinder test.

 Wire hanging test

The wire hang test was carried out to evaluate neuromuscular strength. Each rat was placed with its forelimbs on a 20 cm long wire adjusted horizontally  50 cm above the surface. Latency time to fall was recorded. 30 seconds cut-off time was taken. 21

Cylinder test:

The cylinder test is used to measure locomotor activity and behavioral deficits in the rats by calculating rearing frequency. The spontaneous movement was estimated by inserting each rat in a small transparent cylinder (height, 15.5 cm; diameter, 12.7 cm) for 5 min. The number of rears was recorded after each treatment. A rear was counted when an animal made a vertical movement with both forelimbs removed from the ground .22

Biochemical analysis:

Oxidative stress biomarkers

Lipid peroxidation was evaluated by estimating thiobarbituric acid reactive substances (TBARS) in brain tissues as per.23 Catalase (CAT) and superoxide dismutase (SOD) activities were estimated following 24,25 respectively. Bioassay for xanthine oxidase (XOD) activity was performed according to  Gulec et al.26 Glutamine Synthetase (GtSx) activity was evaluated as per Sunil et al.27 and tyrosine hydroxylase (TH) activity was determined using enzyme linked-Immunosorbent technique using (ELISA) kit provided by BioSource, Inc.San Diego, USA.

Brain inflammatory and apoptotic mediators

Matrix metalloprotein-9 (MMP-9), Nuclear factor Kappa B (NF-κβ), and Caspase-3 and Nuclear factor erythroid -2 (NRF-2) were estimated using ELISA kits provided by Biosource Inc., USA according to the manufacturers’ instructions.

Statistical Analysis

Data were displayed as mean±SEM. All experiments were tested for significance using Tukey's post hoc analysis following one-way ANOVA. Differences were considered significant at p< 0.05.


Phylogenetic Analysis and Identification of Carotenogenic Yeast

The isolated yeast strain G20 has rapid growth and the ability to produce a high quantity of pigments. G20 isolate has a mucous, smooth surface and a color that ranges from orange to red on the YPD agar plate. Cells were oval under the microscope. (Figure 1)

The ITS sequence obtained from isolated G20 strain was compared with the sequences in the GeneBank database and presented that the G20 strain possessed 100% similarity to Rhodotorula mucilaginosa. The nucleotide sequence was placed under the KY271337.1 accession number in the GeneBank (http:/www.ncbi.nlm.nih. gov). The phylogenetic tree of Rhodotorula mucilaginosa KY271337.1was constructed with closely related sequences accessed from the GenBank as shown in Figure 2

HPLC-APCI-MS analysis of the carotenoid extract

The results revealed that the extracted yeast pigment consists mainly of neoxanthin (40%) and β-carotene (30%), according to retention time and absorption spectra as compared to respective reference standards. Neoxanthin was eluted at 2.66 min, β-carotene was eluted at3.47 min. Positive ion mass spectra were obtained for the peaks of maximum absorption and [M+H]+ dominant for neoxanthin was 601.2 of and fragments of 509.1 [M+H-18]+, and 491.2 [M+H-18-92]+. The mass spectra for β-carotene was mass peak of 537.2 [M+H]+, 519.2 [M+H-18]+, and 445.2 [M+H-92]+.

Neurobehavioral assessment

Wire hanging test:

As indicated in table (1), ET-1 treated rats exhibited a shorter latency period in the wire hanging test as compared to the sham  group, Pretreatment of ET-1 rats with carotenoids extract almost normalized the latency period as compared to the control and sham  group 

Cylinder test

Data presented in table 1 revealed that ET-1 treated rats had impaired rearing frequency versus  sham  group, whereas, pre-administration of ET-1 rats with carotenoids extract restored normal rearing frequency as compared to control and sham  group

Oxidative stress status

The current data demonstrated a significant elevation in brain MDA level following ET-1 induced ischemia(1.61±0.15nmol/mg protein)  as compared to the sham control group (0.75± 0.03nmol/mg protein).  Meanwhile, pretreating ischemic rats with carotenoids extract significantly ameliorated brain MDA level as compared to ET-1 injected rats (0.90±0.04nmol/mg protein). XOD could serve as a source for reactive oxygen species (ROS) and was found to be triggered after ET-1 ischemia production (0.19±0.04vs. 0.07±0.03 nmol/mg protein). However, carotenoids extract reduced its content to a normal level (0.07±0.02 nmol/mg protein). In the same manner, GtSx was significantly elevated after ET-1 treatment ( 25.2±4.2 Vs 14.8±2.8 µmol/mg protein)as compared to the sham group, carotenoids extract treatment  significantly attenuated the GtSx level ( 15.5±2.1 µmol/mg protein)  as compared to ischemic group (Fig.3A)

Brain SOD and CAT activities were significantly down-regulated (68%, 74.3% respectively) in ischemic rats as compared to the sham group. However, rats that received carotenoids extract prior to ET-1 administration exhibited significant enhancement in brain antioxidant enzymes activities (104.2% for SOD, 222.2% for CAT) as compared to ET-1 injected group.  Also, A significant depression in TH activity in rat brains was observed following ET-1 administration ( 16.3±4.2 Vs 38.4±6.9 U/mg protein) as compared to the sham group. carotenoids extract pre-administration in ischemic rats significantly ameliorated TH decline in comparison with the ET-1 group. (Fig. 3B)

Data are indicated as mean±sem. Significance at p<0.05. Different characters indicate significant differences

Inflammatory and apoptotic biomarkers:

Neuroinflammation and inflammatory changes of brain tissue trigger most neurodegenerative disorders.  Brain inflammatory mediators values; MMP-9 and NF-κβ (Fig. 4A,4B) as well as apoptotic marker caspase -3 level (Fig.4A) were significantly elevated in ischemic rats in comparison with the sham group. Carotenoid extract pre-treatment revealed both significant anti-neuroinflammatory and anti-apoptotic activities via significantly decreasing the level of  MMP-9, NF-κβ, and caspase- 3  ( 34%,  73.7 %, 50% respectively) as compared to the ischemic group. Furthermore, brain NRF-2 level  was  significantly inhibited by ET-1 treatment  (0.24±0.1 Vs 2.9±0.7 nmol/mg protein) as compared to the sham group, carotenoid extract pre-treatment  almost  restored NRF-2 normal activity (2.1±0.6 nmol/mg protein) (Fig.4C)

Histological investigation

Examining brain slices of sham control animals under a microscope revealed the entrance of a syringe with minimal diffusion and congestion. However, after ET-1 perfusion, the capillary plexus was congested. Nuclear pyknosis and degeneration were observed in neurons of the subiculum, fascia dentate, and hilus associated with congested blood vessels. The striatum showed focal hemorrhage with nuclear pyknosis and degeneration in some neurons as well as diffuse gliosis. Pretreatment with carotenoids extract showed the normal histological structure of the cerebral cortex, as well as the subiculum and fascia dentate and hilus with congested blood vessels in the latter. Diffuse gliosis was detected in between the neurons of the striatum.


In comparison to chemical and inorganic pigments, microbial pigments have numerous advantages. Pigment generation by microorganisms is an efficient and beneficial process as compared to the chemical synthesis of pigments. Microbes can grow easily and fast in the cheap culture medium 28 and are independent from weather conditions. Microbial pigments are available in different shades. These pigments are biodegradable and environment friendly. They also have a number of clinical properties, such as antioxidant, anticancer, antiproliferative, immunosuppressive, diabetes treatment, and so on. Hence, microbial pigment production is now one of the emerging fields of research to demonstrate its potential for various industrial applications.29

Currently, there is no available approved therapy that could minimize cerebral damage and neurological disability caused due to ischemic insult .30 Experimental studies on many neuroprotective agents are still ongoing. The current investigation aimed to investigate the possible neuroprotective effect of carotenoid pigment extracted from Rhodotorula yeast strains against focal cerebral ischemia in rats concerning locomotor, biochemical, and histopathological assessment findings.

Several yeast species can synthesize natural carotenoids, particularly the genera Rhodotorula, Xanthophyllomyces, Phaffia, and Sporobolomyces.31Carotenoids produced by  Rhodotorula species are preferred over other carotenoids –producing microorganisms owing to their high growth rate and unicellular nature.6   Moreover,  Cells may be grown in traditional bioreactors and biomass and used directly in pharmaceuticals.32 Carotenoid pigment production was reported in multipleRhodotorulaisolates such asR. acheniorum, R. minuta, R. mucilaginosa, R. graminis, and R.glutinis.6 Rhodotorula mucilaginosa is one of the most important pigment-producing yeasts. It is considered one of the best potential candidates for biotechnological production of β-carotene and other carotenoids.33 The current study showed a mass production of carotenoid pigments with high biological effectiveness from species R.mucilaginosa.

                 R. mucilaginosa produces four main pigments (torulene, torularhodin, β-carotene, and γ-carotene),34 which are synthesized at different rates depending on the strain .35 Isolated R.mucilaginosa F-1 from a biodiesel plant tank and the main components of its carotenoid content were β-carotene (28.8%), torulene(48.0%) and torularhodin (23.2%). The current study showed that the main bio-pigment components were neoxanthin (40%) and β-carotene (30%). Other carotenoids were also detected in minor quantities.

In the current study, cerebral ischemia was induced by microinjection of a potent vasoconstrictor ET-1.  Cerebral injury induced by ET-1  resulted in impairing neuromuscular strength and locomotor activity, triggering oxidative stress, upsurging inflammatory cascade, and inducing apoptotic damage. 

Ischemic stroke is a cascade of events initiated by a decline in blood flow leads to depletion of oxygen and glucose supply, Ca2+ ion overload, free radical formation, and mitochondrial and DNA damage in neuronal cells.36 Hippocampus is particularly sensitive to stroke and ischemia-due to dense innervations.37 The medial nucleus accumbens, a crucial node in brain circuits that service components of motivation and emphasis spatial information, receives input from the hippocampus's subiculum area.38Histological examination of brain tissue revealed that ET-1 ischemia was localized in the subiculum region and caused nuclear pyknosis and degeneration in neurons of the subiculum, fascia dentate and hilus which explains the impairment in neuromuscular and locomotor activity observed in ET-1 treated rats

Brain energy depends mainly on oxidative phosphorylation. 39 During Ischemia, oxidative stress arises from the impaired mitochondrial electron transport chain 40, where oxygen-free radicals and oxidants are generated and consume the natural defense anti-oxidants such as GSH, SOD, or CAT.41 Additionally, brain high lipid content is susceptible to free radical peroxidation resulting in increased content of MDA(a marker of lipid peroxidation)42 and suppression of TH expression (mRNA and protein) and downregulation of enzyme activity due to accumulation of toxic aldehyde which induces dysfunction of tyrosine hydroxylase and attenuates synthesis of catecholamine neurotransmitter such as dopamine and triggered neuron cell damage .43  Cerebral ischemia injury induces degradation of ATP levels through the generation of toxic oxygen metabolites. Ischemia is allocated to an accelerated increase in the interstitial concentration of hypoxanthine and adenosine which become substrates for the xanthine oxidase pathway.  Elevation in xanthine oxidase results in the induction of oxygen radicals. High levels of oxygen radicals lead to an increase of xanthine oxidase activity.44 Moreover, An increase in extracellular glutamate associated with a decrease in glutamine levels was observed during cerebral ischemia.45 Thus, enhancing brain metabolism of glutamate which in turn upregulates the level of glutamine synthetase enzyme essential in restoring extracellular glutamate following ischemia to a normal level and prevent the neurotoxic effects of this excitatory amino acid on the brain .46

Studies have found that inflammatory processes, excitotoxicity, and depolarizations due to infarcts and apoptosis are associated with cerebral ischemia .47 Ischemia causes activation and accumulation of microglial cells and leukocytes in brain tissues, leading to inflammatory injury and release of inflammatory cytokines Oxidative stress leads to multiple changes including increased levels of pro-inflammatory and pro-oxidant molecules in brain cells, such as NF-κB, XOD, interleukin- 6 (IL-6), tumor necrosis factor-α (TNF-α), and MDA.48Free radicals produced activated MMPs thus allow more damage to BBB and flow of neurotoxins and inflammatory cells .49

The transcription factor NF-κB plays a regulatory role in, metabolism and cell growth, apoptosis, proliferation, aging, survival, synaptic plasticity, and memory.50 The NF-κB signaling pathway is associated with oxidative stress and inflammation .51   Its activation ensues perturbation of cellular homeostasis and triggers either necrosis or apoptosis. Cytochrome c translocates from the cytoplasm after brain ischemia and interacts with apoptotic protease activating factor ( APAF-1) and deoxyadenosine triphosphate (dATP)/ ATP, leading to activation of caspase -9 which in turn activates caspase -3 .


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42. Chen H, Yoshioka H, Kim GS, Jung JE, Okami N, Sakata H, et al. Oxidative stress in ischemic brain damage: mechanisms of cell death and potential molecular targets for neuroprotection. Antioxid Redox Signal. 2011;14(8):1505–1517.

43. Liao YJ, Hou GH, Yang ZB , Zuo ML.  Monosialotetrahexosyl ganglioside protect cerebral ischemia/reperfusion injury through upregulating the expression of tyrosine hydroxylase by inhibiting lipid peroxidation. Biomedicine & Pharmacotherapy. 2016; 84:1923-1929.

44. BuzziniNijveldt  RJ, Van Nood E,  Van Hoorn  DE.  Flavonoids: A review of probable mechanisms of action and potential applications. Am J Clin Nutr. 2001; 74(4): 418-425

45. Jeitner  TM, Battaile K, Cooper AJ. Critical evaluation of the changes in glutamine synthetase activity in models of cerebral stroke. Neurochemical Research. 2015; 40(12): 2544-2556.

46. Petito  CK, Chung MC, Verkhovsky LM , Cooper AJ. Brain glutamine synthetase increases following cerebral ischemia in the rat. Brain Research. 1992; 569(2):275-280.

47. Broughton  BR, Reutens DC, Sobey CG. Apoptotic mechanisms after cerebral ischemia. Stroke. 2009;  40:331-339.

48. Uttara B, Singh AV, Zamboni P, Mahajan RT. Oxidative Stress and Neurodegenerative Diseases: A Review of Upstream and Downstream Antioxidant Therapeutic Options. Curr Neuropharmacol. 2009; 7(1): 65–74.

49. Rosenberg GA, Cunningham LA, Wallace J, Alexander S, Estrada EY, Grossetete M. Immunohistochemistry of matrix metalloproteinases in reperfusion injury to rat brain: activation of MMP-9 linked to stromelysin-1 and microglia in cell cultures. Brain Res. 2001;  893(1):104–12.

50. Pratap UP, Sharma HR, Mohanty A, Kale P, Gopinath S, Hima L, et al. Estrogen upregulates inflammatory signals through NF-κB, IFN-γ, and nitric oxide via Akt/mTOR pathway in the lymph node lymphocytes of middle-aged female rats. Int Immunopharmacol. 2015;29(2):591–598.

51. Srinivasan V, Kriete A, Sacan A, Michal Jazwinski S. Comparing the yeast retrograde response and NF-κB stress responses: implications for aging. Aging Cell. 2010;9(6):933–941.

52. Salminen A, Kauppinen A, Kaarniranta K. Phytochemicals suppress nuclear factor-κB signaling: impact on health span and the aging process. Curr Opin Clin Nutr Metab Care. 2012;15(1):23–28.

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Dr. Pramod Kumar Manjhi joined Editor-in-Chief since July 2021 onwards

COPE guidelines for Reviewers

SCOPUS indexing: 2014, 2019 to 2021

Awards, Research and Publication incentive Schemes by IJCRR

Best Article Award: 

One article from every issue is selected for the ‘Best Article Award’. Authors of selected ‘Best Article’ are rewarded with a certificate. IJCRR Editorial Board members select one ‘Best Article’ from the published issue based on originality, novelty, social usefulness of the work. The corresponding author of selected ‘Best Article Award’ is communicated and information of award is displayed on IJCRR’s website. Drop a mail to for more details.

Women Researcher Award:

This award is instituted to encourage women researchers to publish her work in IJCRR. Women researcher, who intends to publish her research work in IJCRR as the first author is eligible to apply for this award. Editorial Board members decide on the selection of women researchers based on the originality, novelty, and social contribution of the research work. The corresponding author of the selected manuscript is communicated and information is displayed on IJCRR’s website. Under this award selected women, the author is eligible for publication incentives. Drop a mail to for more details.

Emerging Researcher Award:

‘Emerging Researcher Award’ is instituted to encourage student researchers to publish their work in IJCRR. Student researchers, who intend to publish their research or review work in IJCRR as the first author are eligible to apply for this award. Editorial Board members decide on the selection of student researchers for the said award based on originality, novelty, and social applicability of the research work. Under this award selected student researcher is eligible for publication incentives. Drop a mail to for more details.

Best Article Award

A Study by Humaira Tahir et al. entitled "Comparison of First Analgesic Demand after Major Surgeries of Obstetrics and Gynecology between Pre-Emptive Versus Intra-Operative Groups by Using Intravenous Paracetamol: A Cross-Sectional Study" is awarded Best Article for Vol 14 issue 14
A Study by Monica K. entitled "Risk Predictors for Lymphoma Development in Sjogren Syndrome - A Systematic Review" is awarded Best Article for Vol 14 issue 13
A Study by Mokhtar M Sh et al. entitled "Prevalence of Hospital Mortality of Critically Ill Elderly Patients" is awarded Best Article for Vol 14 issue 12
A Study by Vidya S. Bhat et al. entitled "Effect of an Indigenous Cleanser on the Microbial Biofilm on Acrylic Denture Base - A Pilot Study" is awarded Best Article for Vol 14 issue 11
A Study by Pandya S. et al. entitled "Acute and 28-Day Repeated Dose Subacute Toxicological Evaluation of Coroprotect Tablet in Rodents" is awarded Best Article for Vol 14 issue 10
A Study by Muhammad Zaki et al. entitled "Effect of Hemoglobin Level on the Severity of Acute Bronchiolitis in Children: A Case-Control Study" is awarded Best Article for Vol 14 issue 09
A Study by Vinita S & Ayushi S entitled "Role of Colour Doppler and Transvaginal Sonography for diagnosis of endometrial pathology in women presenting with Abnormal Uterine Bleeding" is awarded Best Article for Vol 14 issue 08
A Study by Prabhu A et al. entitled "Awareness of Common Eye Conditions among the ASHA (Accredited Social Health Activist) Workers in the Rural Communities of Udupi District- A Pilot Study" is awarded Best Article for Vol 14 issue 07
A Study by Divya MP et al. entitled "Non-Echoplanar Diffusion-Weighted Imaging and 3D Fiesta Magnetic Resonance Imaging Sequences with High Resolution Computed Tomography Temporal Bone in Assessment and Predicting the Outcome of Chronic Suppurative Otitis Media with Cholesteatoma" is awarded Best Article for Vol 14 issue 06
A Study by Zahoor Illahi Soomro et al. entitled "Functional Outcomes of Fracture Distal Radius after Fixation with Two Different Plates: A Retrospective Comparative Study" is awarded Best Article for Vol 14 issue 05
A Study by Ajai KG & Athira KN entitled "Patients’ Gratification Towards Service Delivery Among Government Hospitals with Particular Orientation Towards Primary Health Centres" is awarded Best Article for Vol 14 issue 04
A Study by Mbungu Mulaila AP et al. entitled "Ovarian Pregnancy in Kindu City, D.R. Congo - A Case Report" is awarded Best Article for Vol 14 issue 03
A Study by Maryam MJ et al. entitled "Evaluation Serum Chemerin and Visfatin Levels with Rheumatoid Arthritis: Possible Diagnostic Biomarkers" is awarded Best Article for Vol 14 issue 02
A Study by Shanthan KR et al. entitled "Comparison of Ultrasound Guided Versus Nerve Stimulator Guided Technique of Supraclavicular Brachial Plexus Block in Patients Undergoing Upper Limb Surgeries" is awarded Best Article for Vol 14 issue 01
A Study by Amol Sanap et al. entitled "The Outcome of Coxofemoral Bypass Using Cemented Bipolar Hemiarthroplasty in the Treatment of Unstable Intertrochanteric Fracture of Femur in a Rural Setup" is awarded Best Article Award of Vol 13 issue 24
A Study by Manoj KP et al. entitled "A Randomized Comparative Clinical Trial to Know the Efficacy of Ultrasound-Guided Transversus Abdominis Plane Block Against Multimodal Analgesia for Postoperative Analgesia Following Caesarean Section" is awarded Best Article Award of Vol 13 issue 23
A Study by Karimova II et al. entitled "Changes in the Activity of Intestinal Carbohydrases in Alloxan-Induced Diabetic Rats and Their Correction with Prenalon" is awarded Best Article of Vol 13 issue 22
A Study by Ashish B Roge et al. entitled "Development, Validation of RP-HPLC Method and GC MS Analysis of Desloratadine HCL and It’s Degradation Products" is awarded Best Article of Vol 13 issue 21
A Study by Isha Gaurav et al. entitled "Association of ABO Blood Group with Oral Cancer and Precancer – A Case-control Study" is awarded Best Article for Vol 13 issue 20
A Study by Amr Y. Zakaria et al. entitled "Single Nucleotide Polymorphisms of ATP-Binding Cassette Gene(ABCC3 rs4793665) affect High Dose Methotrexate-Induced Nephrotoxicity in Children with Osteosarcoma" is awarded Best Article for Vol 13 issue 19
A Study by Kholis Ernawati et al. entitled "The Utilization of Mobile-Based Information Technology in the Management of Dengue Fever in the Community Year 2019-2020: Systematic Review" is awarded Best Article for Vol 13 issue 18
A Study by Bhat Asifa et al. entitled "Efficacy of Modified Carbapenem Inactivation Method for Carbapenemase Detection and Comparative Evaluation with Polymerase Chain Reaction for the Identification of Carbapenemase Producing Klebsiella pneumonia Isolates" is awarded Best Article for Vol 13 issue 17
A Study by Gupta R. et al. entitled "A Clinical Study of Paediatric Tracheostomy: Our Experience in a Tertiary Care Hospital in North India" is awarded Best Article for Vol 13 issue 16
A Study by Chandran Anand et al. entitled "A Prospective Study on Assessment of Quality of Life of Patients Receiving Sorafenib for Hepatocellular Carcinoma" is awarded Best article for Vol 13 issue 15
A Study by Rosa PS et al. entitled "Emotional State Due to the Covid – 19 Pandemic in People Residing in a Vulnerable Area in North Lima" is awarded Best Article for Vol 13 issue 14
A Study by Suvarna Sunder J et al. entitled "Endodontic Revascularization of Necrotic Permanent Anterior Tooth with Platelet Rich Fibrin, Platelet Rich Plasma, and Blood Clot - A Comparative Study" is awarded Best Article for Vol 13 issue 13
A Study by Mona Isam Eldin Osman et al. entitled "Psychological Impact and Risk Factors of Sexual Abuse on Sudanese Children in Khartoum State" is awarded Best Article for Vol 13 issue 12
A Study by Khaw Ming Sheng & Sathiapriya Ramiah entitled "Web Based Suicide Prevention Application for Patients Suffering from Depression" is awarded Best Article for Vol 13 issue 11
A Study by Purushottam S. G. et al. entitled "Development of Fenofibrate Solid Dispersions for the Plausible Aqueous Solubility Augmentation of this BCS Class-II Drug" is awarded Best article for Vol 13 issue 10
A Study by Kumar S. et al. entitled "A Study on Clinical Spectrum, Laboratory Profile, Complications and Outcome of Pediatric Scrub Typhus Patients Admitted to an Intensive Care Unit from a Tertiary Care Hospital from Eastern India" is awarded Best Article for Vol 13 issue 09
A Study by Mardhiah Kamaruddin et al. entitled "The Pattern of Creatinine Clearance in Gestational and Chronic Hypertension Women from the Third Trimester to 12 Weeks Postpartum" is awarded Best Article for Vol 13 issue 08
A Study by Sarmila G. B. et al. entitled "Study to Compare the Efficacy of Orally Administered Melatonin and Clonidine for Attenuation of Hemodynamic Response During Laryngoscopy and Endotracheal Intubation in Gastrointestinal Surgeries" is awarded Best Article for Vol 13 issue 07
A Study by M. Muthu Uma Maheswari et al. entitled "A Study on C-reactive Protein and Liver Function Tests in Laboratory RT-PCR Positive Covid-19 Patients in a Tertiary Care Centre – A Retrospective Study" is awarded Best Article of Vol 13 issue 06 Special issue Modern approaches for diagnosis of COVID-19 and current status of awareness
A Study by Gainneos PD et al. entitled "A Comparative Evaluation of the Levels of Salivary IgA in HIV Affected Children and the Children of the General Population within the Age Group of 9 – 12 Years – A Cross-Sectional Study" is awarded Best Article of Vol 13 issue 05 Special issue on Recent Advances in Dentistry for better Oral Health
A Study by Alkhansa Mahmoud et al. entitled "mRNA Expression of Somatostatin Receptors (1-5) in MCF7 and MDA-MB231 Breast Cancer Cells" is awarded Best Article of Vol 13 issue 06
A Study by Chen YY and Ghazali SRB entitled "Lifetime Trauma, posttraumatic stress disorder Symptoms and Early Adolescence Risk Factors for Poor Physical Health Outcome Among Malaysian Adolescents" is awarded Best Article of Vol 13 issue 04 Special issue on Current Updates in Plant Biology to Medicine to Healthcare Awareness in Malaysia
A Study by Kumari PM et al. entitled "Study to Evaluate the Adverse Drug Reactions in a Tertiary Care Teaching Hospital in Tamilnadu - A Cross-Sectional Study" is awarded Best Article for Vol 13 issue 05
A Study by Anu et al. entitled "Effectiveness of Cytological Scoring Systems for Evaluation of Breast Lesion Cytology with its Histopathological Correlation" is awarded Best Article of Vol 13 issue 04
A Study by Sharipov R. Kh. et al. entitled "Interaction of Correction of Lipid Peroxidation Disorders with Oxibral" is awarded Best Article of Vol 13 issue 03
A Study by Tarek Elwakil et al. entitled "Led Light Photobiomodulation Effect on Wound Healing Combined with Phenytoin in Mice Model" is awarded Best Article of Vol 13 issue 02
A Study by Mohita Ray et al. entitled "Accuracy of Intra-Operative Frozen Section Consultation of Gastrointestinal Biopsy Samples in Correlation with the Final Histopathological Diagnosis" is awarded Best Article for Vol 13 issue 01
A Study by Badritdinova MN et al. entitled "Peculiarities of a Pain in Patients with Ischemic Heart Disease in the Presence of Individual Combines of the Metabolic Syndrome" is awarded Best Article for Vol 12 issue 24
A Study by Sindhu Priya E S et al. entitled "Neuroprotective activity of Pyrazolone Derivatives Against Paraquat-induced Oxidative Stress and Locomotor Impairment in Drosophila melanogaster" is awarded Best Article for Vol 12 issue 23
A Study by Habiba Suhail et al. entitled "Effect of Majoon Murmakki in Dysmenorrhoea (Usre Tams): A Standard Controlled Clinical Study" is awarded Best Article for Vol 12 issue 22
A Study by Ghaffar UB et al. entitled "Correlation between Height and Foot Length in Saudi Population in Majmaah, Saudi Arabia" is awarded Best Article for Vol 12 issue 21
A Study by Siti Sarah Binti Maidin entitled "Sleep Well: Mobile Application to Address Sleeping Problems" is awarded Best Article for Vol 12 issue 20
A Study by Avijit Singh"Comparison of Post Operative Clinical Outcomes Between “Made in India” TTK Chitra Mechanical Heart Valve Versus St Jude Mechanical Heart Valve in Valve Replacement Surgery" is awarded Best Article for Vol 12 issue 19
A Study by Sonali Banerjee and Mary Mathews N. entitled "Exploring Quality of Life and Perceived Experiences Among Couples Undergoing Fertility Treatment in Western India: A Mixed Methodology" is awarded Best Article for Vol 12 issue 18
A Study by Jabbar Desai et al. entitled "Prevalence of Obstructive Airway Disease in Patients with Ischemic Heart Disease and Hypertension" is awarded Best Article for Vol 12 issue 17
A Study by Juna Byun et al. entitled "Study on Difference in Coronavirus-19 Related Anxiety between Face-to-face and Non-face-to-face Classes among University Students in South Korea" is awarded Best Article for Vol 12 issue 16
A Study by Sudha Ramachandra & Vinay Chavan entitled "Enhanced-Hybrid-Age Layered Population Structure (E-Hybrid-ALPS): A Genetic Algorithm with Adaptive Crossover for Molecular Docking Studies of Drug Discovery Process" is awarded Best article for Vol 12 issue 15
A Study by Varsha M. Shindhe et al. entitled "A Study on Effect of Smokeless Tobacco on Pulmonary Function Tests in Class IV Workers of USM-KLE (Universiti Sains Malaysia-Karnataka Lingayat Education Society) International Medical Programme, Belagavi" is awarded Best article of Vol 12 issue 14, July 2020
A study by Amruta Choudhary et al. entitled "Family Planning Knowledge, Attitude and Practice Among Women of Reproductive Age from Rural Area of Central India" is awarded Best Article for special issue "Modern Therapeutics Applications"
A study by Raunak Das entitled "Study of Cardiovascular Dysfunctions in Interstitial Lung Diseas epatients by Correlating the Levels of Serum NT PRO BNP and Microalbuminuria (Biomarkers of Cardiovascular Dysfunction) with Echocardiographic, Bronchoscopic and HighResolution Computed Tomography Findings of These ILD Patients" is awarded Best Article of Vol 12 issue 13 
A Study by Kannamani Ramasamy et al. entitled "COVID-19 Situation at Chennai City – Forecasting for the Better Pandemic Management" is awarded best article for  Vol 12 issue 12
A Study by Muhammet Lutfi SELCUK and Fatma entitled "Distinction of Gray and White Matter for Some Histological Staining Methods in New Zealand Rabbit's Brain" is awarded best article for  Vol 12 issue 11
A Study by Anamul Haq et al. entitled "Etiology of Abnormal Uterine Bleeding in Adolescents – Emphasis Upon Polycystic Ovarian Syndrome" is awarded best article for  Vol 12 issue 10
A Study by entitled "Estimation of Reference Interval of Serum Progesterone During Three Trimesters of Normal Pregnancy in a Tertiary Care Hospital of Kolkata" is awarded best article for  Vol 12 issue 09
A Study by Ilona Gracie De Souza & Pavan Kumar G. entitled "Effect of Releasing Myofascial Chain in Patients with Patellofemoral Pain Syndrome - A Randomized Clinical Trial" is awarded best article for  Vol 12 issue 08
A Study by Virendra Atam et. al. entitled "Clinical Profile and Short - Term Mortality Predictors in Acute Stroke with Emphasis on Stress Hyperglycemia and THRIVE Score : An Observational Study" is awarded best article for  Vol 12 issue 07
A Study by K. Krupashree et. al. entitled "Protective Effects of Picrorhizakurroa Against Fumonisin B1 Induced Hepatotoxicity in Mice" is awarded best article for issue Vol 10 issue 20
A study by Mithun K.P. et al "Larvicidal Activity of Crude Solanum Nigrum Leaf and Berries Extract Against Dengue Vector-Aedesaegypti" is awarded Best Article for Vol 10 issue 14 of IJCRR
A study by Asha Menon "Women in Child Care and Early Education: Truly Nontraditional Work" is awarded Best Article for Vol 10 issue 13
A study by Deep J. M. "Prevalence of Molar-Incisor Hypomineralization in 7-13 Years Old Children of Biratnagar, Nepal: A Cross Sectional Study" is awarded Best Article for Vol 10 issue 11 of IJCRR
A review by Chitra et al to analyse relation between Obesity and Type 2 diabetes is awarded 'Best Article' for Vol 10 issue 10 by IJCRR. 
A study by Karanpreet et al "Pregnancy Induced Hypertension: A Study on Its Multisystem Involvement" is given Best Paper Award for Vol 10 issue 09

List of Awardees

A Study by Ese Anibor et al. "Evaluation of Temporomandibular Joint Disorders Among Delta State University Students in Abraka, Nigeria" from Vol 13 issue 16 received Emerging Researcher Award

A Study by Alkhansa Mahmoud et al. entitled "mRNA Expression of Somatostatin Receptors (1-5) in MCF7 and MDA-MB231 Breast Cancer Cells" from Vol 13 issue 06 received Emerging Researcher Award

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IJCRR Code of Conduct: To achieve a high standard of publication, we adopt Good Publishing Practices (updated in 2022) which are inspired by guidelines provided by Committee on Publication Ethics (COPE), Open Access Scholarly Publishers Association (OASPA) and International Committee of Medical Journal Editors (ICMJE)

Disclaimer: International Journal of Current Research and Review (IJCRR) provides platform for researchers to publish and discuss their original research and review work. IJCRR can not be held responsible for views, opinions and written statements of researchers published in this journal.


International Journal of Current Research and Review (IJCRR) provides platform for researchers to publish and discuss their original research and review work. IJCRR can not be held responsible for views, opinions and written statements of researchers published in this journal


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