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1.
Neuroepidemiology ; 54(4): 287-303, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32074622

RESUMO

BACKGROUND: Diabetes mellitus (DM) is widely spread in South Asian (ASEAN) and Indian sub-continent. The increasing healthcare costs of DM can be prevented in the developing world by improved public healthcare interventions. Modifiable risk factors of DM like sedentary lifestyle, obesity, and stressful conditions are associated with its progression; however, the epidemiological data collected by Public Institutions are limited. SUMMARY: A review of published literature describing geographic distribution of DM and associated dementia in South Asian region, particularly India, was conducted with the purpose of assessing the feasibility and challenges associated with the Yoga-based risk reduction. PubMed and Google Scholar databases were searched for DM and dementia-related articles by using a combination of keywords: Diabetes, Diabetes related Dementia Southeast Asia, Pre-diabetes, Yoga, lifestyle modification, Dementia and Exercise. The epidemiological data generated from these diseases have not prompted to any major public health policies. Yoga can be a cost-effective intervention for the prevention of Type 2 DM (T2DM) and its associated cognitive decline when detected early. If nationwide intervention of Yoga is brought about by the state, its integration in health care will become more meaningful and acceptable. Key Message: Studies suggest that Yoga and change in lifestyle can modify the health risks associated with T2DM and associated dementia if it is mainstreamed with the public health initiative of Ayushman Bharat scheme.


Assuntos
Disfunção Cognitiva , Demência , Complicações do Diabetes , Diabetes Mellitus Tipo 2 , Saúde Pública , Sudeste Asiático/epidemiologia , Disfunção Cognitiva/epidemiologia , Disfunção Cognitiva/etiologia , Disfunção Cognitiva/prevenção & controle , Demência/epidemiologia , Demência/etiologia , Demência/prevenção & controle , Complicações do Diabetes/epidemiologia , Complicações do Diabetes/etiologia , Complicações do Diabetes/prevenção & controle , Diabetes Mellitus Tipo 2/complicações , Diabetes Mellitus Tipo 2/epidemiologia , Diabetes Mellitus Tipo 2/reabilitação , Humanos , Índia/epidemiologia , Yoga
2.
Bioconjug Chem ; 30(9): 2404-2416, 2019 09 18.
Artigo em Inglês | MEDLINE | ID: mdl-31436412

RESUMO

Current chemotherapeutic regimens for acute myeloid leukemia (AML) have been modestly effective in patients and are associated with poor long-term survival (<30% at 5 years). Viral vector-based suicide gene therapy is an attractive option, if these vectors can target the AML cells with high specificity and efficiency. In this study, we have developed a receptor-specific adeno-associated virus (AAV) based vector to target the CD33 antigen which is overexpressed in leukemic cells. A targeting peptide was rationally designed from the antigen-binding regions of a CD33 monoclonal antibody. This peptide was further expressed on the capsid of the AAV6 vector, since this serotype was most efficient among AAV1-rh10 vectors to infect the pro-monocytic, human myeloid leukemia cells (U937). AAV6-CD33 vectors expressing a suicide gene, the inducible caspase 9 (iCasp9), and its prodrug AP20187 significantly reduced (∼59%) the viability of U937 cells. To further test its efficacy and specificity in vivo, AAV6-CD33 vectors were administered into a xenotransplantation model of AML in zebrafish through systemic delivery. We observed a significant antileukemic effect with AAV6-CD33 vectors, with a markedly higher survival (100% for AAV6-CD33 vectors vs 15% for mock-treated) and a higher number of TUNEL positive apoptotic cells after systemic vector delivery. Taken together, our work demonstrates the efficacy and translational potential of CD33-targeted AAV6 vectors for cytotoxic gene therapy in AML.


Assuntos
Caspase 9/genética , Dependovirus/genética , Genes Transgênicos Suicidas/genética , Terapia Genética/métodos , Vetores Genéticos/genética , Leucemia Mieloide Aguda/genética , Lectina 3 Semelhante a Ig de Ligação ao Ácido Siálico/genética , Animais , Linhagem Celular Tumoral , Transformação Celular Neoplásica , Expressão Gênica , Humanos , Leucemia Mieloide Aguda/patologia , Leucemia Mieloide Aguda/terapia , Peixe-Zebra
3.
Bioconjug Chem ; 30(6): 1754-1762, 2019 06 19.
Artigo em Inglês | MEDLINE | ID: mdl-31181889

RESUMO

Current treatment approaches for hepatocellular carcinoma (HCC) have a narrow therapeutic index and alternate modes of treatment are thus required. We have utilized a gene delivery vector containing inducible caspase 9 (iCasp9) gene, which is a synthetic analogue based on the mammalian caspase 9 and fused to a human FK506 binding protein that allows its conditional dimerization to a synthetic, small molecule [chemical inducer of dimerization, AP20187] and results in target cell apoptosis. In our studies, we have tested these synthetic vectors based on an adeno-associated virus platform for their potential anti-tumorigenic effect in human HCC cells in vitro and in a HCC tumor model developed in nude mice. Our data demonstrates that the iCasp9-AP20187 bioconjugate is able to trigger terminal effectors of cellular apoptosis and presents a viable approach for the potential treatment of HCC.


Assuntos
Carcinoma Hepatocelular/terapia , Caspase 9/genética , Dependovirus/genética , Técnicas de Transferência de Genes , Vetores Genéticos/uso terapêutico , Neoplasias Hepáticas/terapia , Animais , Carcinoma Hepatocelular/genética , Linhagem Celular Tumoral , Terapia Genética , Vetores Genéticos/genética , Humanos , Neoplasias Hepáticas/genética , Camundongos Endogâmicos BALB C , Camundongos Nus , Proteínas de Ligação a Tacrolimo/genética
4.
Mol Pharm ; 16(11): 4738-4750, 2019 11 04.
Artigo em Inglês | MEDLINE | ID: mdl-31596095

RESUMO

Recombinant adeno-associated virus (AAV)-based gene therapy has been promising, but several host-related transduction or immune challenges remain. For this mode of therapy to be widely applicable, it is crucial to develop high transduction and permeating vectors that infect the target at significantly low doses. Because glycosylation of capsid proteins is known to be rate limiting in the life cycle of many viruses, we reasoned that perturbation of glycosylation sites in AAV2 capsid will enhance gene delivery. In our first set experiments, pharmacological modulation of the glycosylation status in host cells, modestly decreased (1-fold) AAV2 packaging efficacy while it improved their gene expression (∼74%) in vitro. We then generated 24 mutant AAV2 vectors modified to potentially create or disrupt a glycosylation site in its capsid. Three of them demonstrated a 1.3-2.5-fold increase in transgene expression in multiple cell lines (HeLa, Huh7, and ARPE-19). Hepatic gene transfer of these vectors in hemophilia B mice, resulted in a 2-fold increase in human coagulation factor (F)IX levels, while its T/B-cell immunogenic response was unaltered. Subsequently, intravitreal gene transfer of glycosylation site-modified vectors in C57BL6/J mice demonstrated an increase in green fluorescence protein expression (∼2- to 4-fold) and enhanced permeation across retina. Subretinal administration of these modified vectors containing RPE65 gene further rescued the photoreceptor response in a murine model of Leber congenital amarousis. Our studies highlight the translational potential of glycosylation site-modified AAV2 vectors for hepatic and ocular gene therapy applications.


Assuntos
Proteínas do Capsídeo/genética , Capsídeo/metabolismo , Dependovirus/genética , Hemofilia A/genética , Degeneração Retiniana/genética , Animais , Linhagem Celular , Linhagem Celular Tumoral , Modelos Animais de Doenças , Expressão Gênica/genética , Técnicas de Transferência de Genes , Terapia Genética/métodos , Vetores Genéticos/genética , Proteínas de Fluorescência Verde/genética , Células HeLa , Hemofilia A/metabolismo , Humanos , Fígado/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Retina/metabolismo , Degeneração Retiniana/metabolismo , Transdução Genética/métodos , Transgenes/genética
5.
Crit Rev Eukaryot Gene Expr ; 24(3): 255-68, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25072150

RESUMO

BACKGROUND: Cytoskeleton is one of the essential forms of protein, important in the existence of both eukaryotic as well as prokaryotic cells. Its transformation plays a vital role in cell division and intracellular transportation by facilitating intracellular vesicular traffic. Among the various tissue types in the body, the neural tissue exhibits the maximum heterogeneity, and hence the role of cytoskeleton at both developmental and functional levels becomes paramount. Cytoskeleton dynamics have been established in the neural physiology, but only at the level of axonal development and growth. Retina has not been adequately studied in the context of cytoskeletal proteins. METHODS: We reviewed the last 10 years of literature with reference to the development, growth, degeneration, and regeneration of the retina and the role of cytoskeleton in each aspect. We have focused on various changes that the retina undergoes at the cytosolic and cytoskeletal levels in the course of degeneration as well as regeneration. FINDINGS: For this review, we compiled research articles pertaining to the role of cytoskeletal and other associated proteins involved in development of retina, which used various animal models. The effect of SNPs in the cytoskeletal proteins and their impact in retinal degeneration is also discussed. CONCLUSION: Studies describing the role of cytoskeleton in the anatomy and physiology of retina and its layers, although they are few, collectively provide an opportunity to understand retinal development in the context of cytoskeleton dynamics.


Assuntos
Citoesqueleto de Actina/fisiologia , Sistema Nervoso Central/fisiologia , Retina/crescimento & desenvolvimento , Retina/fisiologia , Animais , Diferenciação Celular , Sistema Nervoso Central/citologia , Sistema Nervoso Central/crescimento & desenvolvimento , Proteínas do Citoesqueleto/metabolismo , Humanos , Camundongos , Microtúbulos/fisiologia , Retina/citologia , Degeneração Retiniana
6.
Nat Commun ; 15(1): 6150, 2024 Jul 21.
Artigo em Inglês | MEDLINE | ID: mdl-39034314

RESUMO

Non-neovascular or dry age-related macular degeneration (AMD) is a multi-factorial disease with degeneration of the aging retinal-pigmented epithelium (RPE). Lysosomes play a crucial role in RPE health via phagocytosis and autophagy, which are regulated by transcription factor EB/E3 (TFEB/E3). Here, we find that increased AKT2 inhibits PGC-1α to downregulate SIRT5, which we identify as an AKT2 binding partner. Crosstalk between SIRT5 and AKT2 facilitates TFEB-dependent lysosomal function in the RPE. AKT2/SIRT5/TFEB pathway inhibition in the RPE induced lysosome/autophagy signaling abnormalities, disrupted mitochondrial function and induced release of debris contributing to drusen. Accordingly, AKT2 overexpression in the RPE caused a dry AMD-like phenotype in aging Akt2 KI mice, as evident from decline in retinal function. Importantly, we show that induced pluripotent stem cell-derived RPE encoding the major risk variant associated with AMD (complement factor H; CFH Y402H) express increased AKT2, impairing TFEB/TFE3-dependent lysosomal function. Collectively, these findings suggest that targeting the AKT2/SIRT5/TFEB pathway may be an effective therapy to delay the progression of dry AMD.


Assuntos
Autofagia , Fatores de Transcrição de Zíper de Leucina e Hélice-Alça-Hélix Básicos , Lisossomos , Degeneração Macular , Proteínas Proto-Oncogênicas c-akt , Epitélio Pigmentado da Retina , Transdução de Sinais , Sirtuínas , Fatores de Transcrição de Zíper de Leucina e Hélice-Alça-Hélix Básicos/metabolismo , Fatores de Transcrição de Zíper de Leucina e Hélice-Alça-Hélix Básicos/genética , Animais , Proteínas Proto-Oncogênicas c-akt/metabolismo , Sirtuínas/metabolismo , Sirtuínas/genética , Degeneração Macular/metabolismo , Degeneração Macular/patologia , Degeneração Macular/genética , Humanos , Camundongos , Epitélio Pigmentado da Retina/metabolismo , Epitélio Pigmentado da Retina/patologia , Lisossomos/metabolismo , Coativador 1-alfa do Receptor gama Ativado por Proliferador de Peroxissomo/metabolismo , Coativador 1-alfa do Receptor gama Ativado por Proliferador de Peroxissomo/genética , Camundongos Endogâmicos C57BL , Mitocôndrias/metabolismo , Modelos Animais de Doenças , Células-Tronco Pluripotentes Induzidas/metabolismo , Masculino
7.
Methods Mol Biol ; 2712: 179-186, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37578706

RESUMO

Ferroptosis is a recently described process of cell death that is dependent on unregulated cellular iron accumulation with induction of oxidative stress. Ferroptosis has been linked to several human diseases; therefore, investigations aimed at better understanding the pathway and elucidating avenues for future drug development are warranted. Current assays that target ferroptosis/oxidative stress in cells is limited to western blotting and imaging techniques, and unfortunately provide only a broad understanding that is insufficient to effectively assess novel drugs (ligands). Specifically, these assays do not provide insights about ligand interactions with specific proteins associated with these processes. Herein, we discuss a cell-based thermal shift assay that enables screening of ligands under specific cellular conditions for targeting ferroptosis and/or oxidative stress pathways. These data would provide detailed preliminary evidence required for drug development that targets this pathway.


Assuntos
Ferroptose , Humanos , Bioensaio , Western Blotting , Morte Celular , Desenvolvimento de Medicamentos
8.
bioRxiv ; 2023 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-37609254

RESUMO

Age-related macular degeneration (AMD), the leading cause of geriatric blindness, is a multi-factorial disease with retinal-pigmented epithelial (RPE) cell dysfunction as a central pathogenic driver. With RPE degeneration, lysosomal function is a core process that is disrupted. Transcription factors EB/E3 (TFEB/E3) tightly control lysosomal function; their disruption can cause aging disorders, such as AMD. Here, we show that induced pluripotent stem cells (iPSC)-derived RPE cells with the complement factor H variant [ CFH (Y402H)] have increased AKT2, which impairs TFEB/TFE3 nuclear translocation and lysosomal function. Increased AKT2 can inhibit PGC1α, which downregulates SIRT5, an AKT2 binding partner. SIRT5 and AKT2 co-regulate each other, thereby modulating TFEB-dependent lysosomal function in the RPE. Failure of the AKT2/SIRT5/TFEB pathway in the RPE induced abnormalities in the autophagy-lysosome cellular axis by upregulating secretory autophagy, thereby releasing a plethora of factors that likely contribute to drusen formation, a hallmark of AMD. Finally, overexpressing AKT2 in RPE cells in mice led to an AMD-like phenotype. Thus, targeting the AKT2/SIRT5/TFEB pathway could be a potential therapy for atrophic AMD.

9.
JCI Insight ; 8(12)2023 06 22.
Artigo em Inglês | MEDLINE | ID: mdl-37345657

RESUMO

Diabetic retinopathy (DR) is a leading cause of blindness in working-age adults and remains an important public health issue worldwide. Here we demonstrate that the expression of stimulator of interferon genes (STING) is increased in patients with DR and animal models of diabetic eye disease. STING has been previously shown to regulate cell senescence and inflammation, key contributors to the development and progression of DR. To investigate the mechanism whereby STING contributes to the pathogenesis of DR, diabetes was induced in STING-KO mice and STINGGT (loss-of-function mutation) mice, and molecular alterations and pathological changes in the retina were characterized. We report that retinal endothelial cell senescence, inflammation, and capillary degeneration were all inhibited in STING-KO diabetic mice; these observations were independently corroborated in STINGGT mice. These protective effects resulted from the reduction in TBK1, IRF3, and NF-κB phosphorylation in the absence of STING. Collectively, our results suggest that targeting STING may be an effective therapy for the early prevention and treatment of DR.


Assuntos
Diabetes Mellitus Experimental , Retinopatia Diabética , Animais , Camundongos , Retinopatia Diabética/genética , Células Endoteliais , Nucleotidiltransferases/genética , Inflamação , Senescência Celular , Cromogranina A
10.
Front Public Health ; 10: 843134, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35769774

RESUMO

Aim: Common Yoga Protocol (CYP) is a standardized yoga protocol authored by experts from all over the world under the aegis of the Ministry of AYUSH, Ayurveda, Yoga and Naturopathy, Unani, Siddha, Sowa Rigpa and Homeopathy (AYUSH). The potential of CYP can be determined as a cost-effective lifestyle modification to prevent the risk of developing cardiovascular diseases (CVD). Methods: In this prospective trial, we compared the effect of CYP at baseline and after 1 month. A total of 374 yoga-naïve participants performed CYP under the supervision of experienced trainers. Physiological [body mass index (BMI), blood pressure, percent oxygen saturation], biochemical (fasting blood glucose and lipid profile), and neurocognitive parameters were measured before and after the intervention. Results: At day 30 of yoga practice, serum levels of low-density lipoprotein (LDL), total cholesterol (TC), and high-density lipoprotein (HDL) were found significantly improved as compared to the baseline levels observed at the time of enrollment. Similarly, the lipid profile was also obtained from experienced trainers and found to be significantly different from those of yoga-naïve volunteers. When the intervention was compared between the healthy yoga-naïve participants with yoga-naïve participants suffering from medical issues, it was found that cholesterol profile improved significantly in the healthy-naive group as compared to the diseased group (hypertension, diabetes, underwent surgery, and CVD). Conclusion: These results highlight the need for further research to better understand the effects of yoga on the primary prevention of CVD.


Assuntos
Doenças Cardiovasculares , Yoga , Doenças Cardiovasculares/prevenção & controle , Colesterol , Humanos , Estilo de Vida , Estudos Prospectivos
11.
Cell Transplant ; 29: 963689720946031, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33023312

RESUMO

A number of degenerative conditions affecting the neural retina including age-related macular degeneration have no successful treatment, resulting in partial or complete vision loss. There are a number of stem cell replacement strategies for recovery of retinal damage using cells from variable sources. However, literature is still deficit in the comparison of efficacy of types of stem cells. The purpose of the study was to compare the therapeutic efficacy of undifferentiated cells, i.e., lineage negative stem cells (Lin-ve SC) with differentiated neurosphere derived from ciliary epithelium (CE) cells on retinal markers associated with laser-induced retinal injury. Laser-induced photocoagulation was carried out to disrupt Bruch's membrane and retinal pigmented epithelium in C57BL/6 mouse model. Lineage negative cells were isolated from human umbilical cord blood, whereas neurospheres were derived from CE of post-aborted human eyeballs. The cells were then transplanted into subretinal space to study their effect on injury. Markers of neurotropic factors, retina, apoptosis, and proliferation were analyzed after injury and transplantation. mRNA expression was also analyzed by real-time polymerase chain reaction at 1 week, and 3-month immunohistochemistry was evaluated at 1-week time point. CE cell transplantation showed enhanced differentiation of rods and retinal glial cells. However, Lin-ve cells exerted paracrine-dependent modulation of neurotrophic factors, which is possibly mediated by antiapoptotic and proliferative effects. In conclusion, CE transplantation showed superior regenerative outcome in comparison to Lin-ve SC for rescue of artificially injured rodent retinal cells. It is imperative that this source for transplantation may be extensively studied in various doses and additional retinal degeneration models for prospective clinical applications.


Assuntos
Cílios/metabolismo , Células Epiteliais/transplante , Olho/embriologia , Sangue Fetal/citologia , Feto/embriologia , Lasers/efeitos adversos , Degeneração Retiniana/terapia , Células-Tronco/citologia , Animais , Apoptose , Diferenciação Celular , Linhagem da Célula , Proliferação de Células , Fator Neurotrófico Ciliar/metabolismo , Modelos Animais de Doenças , Células Epiteliais/citologia , Humanos , Masculino , Camundongos Endogâmicos C57BL , Fatores de Crescimento Neural/metabolismo , Degeneração Retiniana/patologia , Células Ganglionares da Retina/patologia , Esferoides Celulares/citologia , Transplante de Células-Tronco
12.
Mol Ther Methods Clin Dev ; 17: 497-504, 2020 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-32258213

RESUMO

During recombinant Adeno-associated virus (AAV) production, a proportionately large amount of vectors is released in the culture supernatant, which is often discarded. It has been shown that these vectors often associate with vesiculated structures, such as exosomes. Exosome-associated AAV (vexosomes) represent an additional gene-delivery platform. The efficiency of such vexosomes in suicide gene therapy is unexplored. In the present study, we have generated AAV serotype 6 vexosomes containing an inducible caspase 9 (iCasp9) suicide gene by a differential ultracentrifugation-based protocol. We further tested the cytotoxic potential of these vexosomes in a human hepatocellular carcinoma (HCC) model in vitro and in vivo. The AAV6-iCasp9 containing vexosomes, when primed with a pro-drug (AP20187), demonstrated a significant loss in cell viability (57% ± 8% versus 100% ± 4.8%, p < 0.001) in comparison to mock-treated Huh7 cells. An intratumoral administration of AAV6-iCasp9 vexosomes and AP20187 in a murine xenograft model revealed a 2.3-fold increase in tumor regression in comparison to untreated animals. These findings were further corroborated by histological analysis and apoptosis assays. In conclusion, our data demonstrate the therapeutic potential of AAV6 vexosomes in a xenotransplantation model of HCC. Furthermore, the simplicity in production and isolation of vexosomes should further facilitate its application in other malignancies.

13.
Cancer Med ; 9(9): 3188-3201, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32108448

RESUMO

Recent success in clinical trials with recombinant Adeno-associated virus (AAV)-based gene therapy has redirected efforts in optimizing AAV assembly and production, to improve its potency. We reasoned that inclusion of a small RNA during vector assembly, which specifically alters the phosphorylation status of the packaging cells may be beneficial. We thus employed microRNAs (miR-431, miR-636) identified by their ability to bind AAV genome and also dysregulate Mitogen-activated protein kinase (MAPK) signaling during vector production, by a global transcriptome study in producer cells. A modified vector assembly protocol incorporating a plasmid encoding these microRNAs was developed. AAV2 vectors packaged in the presence of microRNA demonstrated an improved gene transfer potency by 3.7-fold, in vitro. Furthermore, AAV6 serotype vectors encoding an inducible caspase 9 suicide gene, packaged in the presence of miR-636, showed a significant tumor regression (~2.2-fold, P < .01) in a syngeneic murine model of T-cell lymphoma. Taken together, we have demonstrated a simple but effective microRNA-based approach to improve the assembly and potency of suicide gene therapy with AAV vectors.


Assuntos
Caspase 9/genética , Dependovirus/genética , Genes Transgênicos Suicidas , Terapia Genética , Vetores Genéticos/administração & dosagem , Linfoma/terapia , MicroRNAs/genética , Técnicas de Transferência de Genes , Vetores Genéticos/genética , Humanos , Linfoma/genética , Transdução Genética , Células Tumorais Cultivadas
14.
Medicines (Basel) ; 7(3)2020 Mar 06.
Artigo em Inglês | MEDLINE | ID: mdl-32155939

RESUMO

Background: The deprivation of oxygen reaching the tissues (also termed as hypoxia) affects the normal functioning of the body. This results in development of many diseases like ischemia, glaucoma, MCI (Mild Cognitive Impairment), pulmonary and cerebral edema, stress and depression. There are no effective drugs that can treat such diseases. Despite such failure, alternative interventions such as mind-body techniques (MBTs) have not been adequately investigated. Methods: The first part of this review has been focused on philosophical aspects of various MBTs besides evolving an ayurgenomic perspective. The potential of MBTs as a preventive non-pharmacological intervention in the treatment of various general and hypoxic pathologies has been further described in this section. In the second part, molecular, physiological, and neuroprotective roles of MBTs in normal and hypoxic/ischemic conditions has been discussed. Results: In this respect, the importance of and in vivo studies has also been discussed. Conclusions: Although several studies have investigated the role of protective strategies in coping with the hypoxic environment, the efficacy of MBTs at the molecular level has been ignored.

15.
J Ayurveda Integr Med ; 11(4): 489-494, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32088091

RESUMO

BACKGROUND: Repeated failure to rescue the damaged retinal ganglion cells (RGCs) by various drugs has warranted the need to screen common herbal compounds available in the form of various eye formulations for their efficacy. OBJECTIVE: We aimed to investigate the neuroprotective effect of pretreatment with aqueous extract of A. cepa in Ischemia/Reperfusion (I/R) induced retinal injury. METHODS: Ischemia was induced for 2 h by pterygopalatine artery (PPA) ligation in C57BL/6J mice, followed by reperfusion. The neuroprotective role of oral pretreatment with aqueous extract of A. cepa (300 mg/kg) was analyzed with respect to control and injury only group at 7, 14, and 28 day after the surgery for expression of different genes in the retina by Real-Time PCR. RESULTS: Molecular analysis at different time points showed increased expression of BCl-2, GDNF, GFAP, and Brn3b in the retina at 14 and 28 day after A. cepa treatment in comparison to the injury alone group. However, at shorter time point (7th day), the expression of these genes was pronounced in the injury only group in comparison to the injury and pretreated group. CONCLUSION: Pretreatment with aqueous extract of A. cepa may protect from the neuronal damage in I/R-induced retinal injury in mice by altering the expression of neurotrophic factor.

16.
Curr Neurovasc Res ; 16(3): 187-193, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31258084

RESUMO

BACKGROUND: Retinal degeneration and related eye disorders have limited treatment interventions. Since stem cell therapy has shown promising results, ciliary epithelium (CE) derived stem cells could be a better choice given the fact that cells from eye niche can better integrate with the degenerating retina, rewiring the synaptic damage. OBJECTIVE: To test the effect of human fetal pigmented ciliary epithelium-derived neurospheres in the mouse model of laser-induced retinal degeneration. METHODS: C57 male mice were subjected to retinal injury by Laser photocoagulation. Human fetal pigmented ciliary epithelium was obtained from post-aborted human eyeballs and cultured with epidermal growth factor (rhEGF) and fibroblast growth factor (rhFGF). The six day neurospheres were isolated, dissociated and transplanted into the subretinal space of the laser injured mice at the closest proximity to Laser shots. Mice were analyzed for functional vision through electroretinogram (ERG) and sacrificed at 1 week and 12 week time points. Retinal, Neurotropic, Apoptotic and proliferation markers were analysed using real-time polymerase chain reaction (PCR). RESULTS: The CE neurospheres showed an increase in the expression of candidate genes analyzed in the study at 1 week time point, which sustained for longer time point of 12 weeks. CONCLUSION: We showed the efficacy of human CE cells in the regeneration of retinal degeneration in murine model for the first time. CE cells need to be explored comprehensively both in disease and degeneration.


Assuntos
Células-Tronco Fetais/fisiologia , Lasers/efeitos adversos , Regeneração Nervosa/fisiologia , Degeneração Retiniana/terapia , Epitélio Pigmentado da Retina/fisiologia , Transplante de Células-Tronco/métodos , Animais , Células Cultivadas , Cílios/fisiologia , Cílios/transplante , Células Epiteliais/fisiologia , Células Epiteliais/transplante , Células-Tronco Fetais/química , Células-Tronco Fetais/transplante , Humanos , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Degeneração Retiniana/etiologia , Degeneração Retiniana/patologia , Epitélio Pigmentado da Retina/transplante
17.
Environ Sci Pollut Res Int ; 26(15): 15548-15558, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30945075

RESUMO

Lead (Pb) exposure is reported to be unsafe for humans. There have been several studies documenting acute and chronic Pb toxicity on the organ systems. New studies suggest that early-life exposure to such environmental toxins may increase the susceptibility to late-onset degenerative disorders. We aimed to examine the long-term effects of early-life postnatal exposure of Pb on retinal degeneration. Pb exposure (200 ppm) was provided either at postnatal day 1 through lactation (early-life exposure) or at 7th week of age (adulthood exposure) directly through drinking water for 20 days. The Pb-treated mice were followed till 20 weeks of age. At 20th week, ischemia/reperfusion (I/R) injury was induced in these mice by pterygopalatine artery ligation. Further, alpha lipoic acid (ALA) was administered to examine its neuroprotective effects against retinal damage. Histological and molecular analysis revealed that Pb-treated mice had greater retinal damage after I/R injury as compared to untreated or ALA treated mice, suggesting that ALA protects the early-life Pb exposure and its consequent impact on later life. The elevated levels of glial derived neurotrophic factor (GDNF) and ciliary neurotrophic factor (CNTF) and reduced levels of glial fibrillary acidic protein (GFAP) upon ALA pre-treatment suggest that it probably exerts anti-inflammatory effects via upregulation of neurotrophic factors.


Assuntos
Fator Neurotrófico Ciliar/efeitos dos fármacos , Fator Neurotrófico Derivado de Linhagem de Célula Glial/metabolismo , Proteína Glial Fibrilar Ácida/metabolismo , Chumbo/química , Traumatismo por Reperfusão/fisiopatologia , Doenças Retinianas/fisiopatologia , Ácido Tióctico/uso terapêutico , Animais , Fator Neurotrófico Ciliar/química , Fator Neurotrófico Ciliar/genética , Fator Neurotrófico Derivado de Linhagem de Célula Glial/química , Fator Neurotrófico Derivado de Linhagem de Célula Glial/genética , Proteína Glial Fibrilar Ácida/química , Camundongos , Ácido Tióctico/química
18.
Diabetes Metab Syndr ; 13(4): 2705-2713, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31405697

RESUMO

BACKGROUND: Yoga is an ancient system of wellness with Asana and Pranayama as its most popular and propagated modules for management of lifestyle disorders. OBJECTIVES: The aim of the study was to characterise the liver abnormalities, biochemical changes, and stress levels after Yoga intervention in prediabetic females. MATERIALS AND METHODS: 37 females were randomly divided into Yoga practising and non-practising control groups. The Yoga practising group performed Diabetic Yoga Protocol (DYP) for 3 months. Parameters including size of liver, fatty infiltration, and grade of severity were measured using ultrasonography along with biochemical parameters and stress levels at baseline and after Yoga practice. RESULTS: The glycosylated hemoglobin (HbA1c) and glucose levels were found significantly reduced in prediabetic (p = 0.015) women after practising DYP, although cholesterol levels increased in menopausal women. No escalation of fatty liver was noted among women practising DYP. CONCLUSION: DYP reduced the HbA1c and stress levels and therefore, could be a cost-effective tool for preventing prediabetes to diabetes progression.


Assuntos
Biomarcadores/análise , Diabetes Mellitus Tipo 2/prevenção & controle , Fígado/fisiologia , Estado Pré-Diabético/terapia , Estresse Fisiológico , Yoga , Glicemia/análise , Estudos de Casos e Controles , Diabetes Mellitus Tipo 2/metabolismo , Feminino , Seguimentos , Hemoglobinas Glicadas/análise , Humanos , Estilo de Vida , Fígado/diagnóstico por imagem , Pessoa de Meia-Idade , Estado Pré-Diabético/diagnóstico por imagem , Prognóstico , Ultrassonografia/métodos
19.
Ann Neurosci ; 26(1): 21-24, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31975768

RESUMO

BACKGROUND: Attempts for Guinness world record have continued worldwide but these attempts were rarely aimed to promote public health. Diabetes is one of the rapidly growing lifestyle disorders in India which requires awareness reinforcements among the local population. In recent studies, Yoga has proved to be useful in lifestyle modification and Diabetes management. However, most individuals from rural and urban localities in the country are unaware of this fact. PURPOSE: The purpose was to organizing a nationwide attempt under the Niyantrit Madhumeh Bharat (NMB) programme to break the world record to be the largest Diabetes lesson, to spread awareness among general population. METHODS: Present article represents the perspective of the Chandigarh chapter of NMB programme and its experience in Guinness world record attempt. Diabetes awareness lesson was organized in the city as per the standards defined by the Guinness Book and outcomes of the entire campaign were assessed at the end of the campaign. RESULT: Total 498 individuals participated in the campaign. Among them, 268 participants were questioned at the end of the campaign about the role of Yoga in Diabetes. 247 participants (92%) were agreed that Diabetes can be modified by Yoga and 9 participants (3%) disagreed. The remaining 12 participants (5%) did not give any response. CONCLUSION: We noticed that most of the participants became aware of the role of Yoga in Diabetes.

20.
Ann Neurosci ; 26(2): 75-81, 2019 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31975777

RESUMO

BACKGROUND: The state of disarray from unhygienic conditions and excessive litter throughout urban highways, alleyways, and byways across rural and urban localities of India is abysmal. Such unsanitary conditions impinge upon the future health and welfare of its citizens, tourists and economic development. PURPOSE: The NRL volunteered PGIMER's campus hygiene initiative" is a pioneering effort spearheaded in compliance with Indian Prime Minister's call that citizens of India work together to establish a cleaner and healthier environment. METHODS: A group of 15 highly motivated students in the Neuroscience Division of the PGIMER, worked together vigorously 2 hours a week to affect a cleaner urban environment in the city. RESULT: The results were national Kayakalp and Skoch award to PGIMER as the cleanest hospital in the country, the vendors or patients no longer litter around the campus, the pot holes have been converted into greener patches, signs board adorn the campus. CONCLUSION: To inspire citizens through faculty- student led sanitation programs.

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