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1.
Trop Anim Health Prod ; 55(6): 369, 2023 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-37864734

RESUMO

Malaimadu cattle is a less explored indigenous cattle germplasm reared in the Western Ghats area of Tamil Nadu, south India. This study aimed to analyze the morphological structure of the Malaimadu cattle using a multivariate approach that explains and best represents body conformation. Sixteen body measurements were obtained from 156 adult female cattle from their native breeding tract. The Nearest Neighbor Method of Hierarchical Cluster analysis was used to group the morphometric traits into clusters. Pearson's coefficients of correlation (r) were estimated to determine the phenotypic correlations between different body measurements. Traits were analyzed using varimax rotated principal component analysis (PCA) with Kaiser normalization. Cluster analysis categorizes morphometric traits into two distinct clusters with the first cluster formed by traits related to horns and face, while the second cluster denotes general body conformation. Out of 120 phenotypic correlations, 55 were significant of which 51 were positive correlations. The estimated correlation coefficient ranges between - 0.50 (body length and face width) to 0.85 (chest girth and body weight). PCA extracted six components representing 70.19% of the total variance, while the first principal component comprises chest girth (CG), body weight (BW), height at wither (HW), and Paunch girth (PG) alone accounts for 23.70% thereby describing the general size and shape of the animal. The multivariate approach has proven to be effective in differentiating Malaimadu cattle from other indigenous breeds of south India with clear morphometric differences that help in identifying the pure phenotype for future propagation and also for devising breeding strategies.


Assuntos
Reprodução , Bovinos , Feminino , Animais , Índia , Peso Corporal , Análise Multivariada , Fenótipo
2.
Int J Mol Sci ; 23(1)2021 Dec 21.
Artigo em Inglês | MEDLINE | ID: mdl-35008469

RESUMO

High-dose salicylate induces temporary moderate hearing loss and the perception of a high-pitched tinnitus in humans and animals. Previous studies demonstrated that high doses of salicylate increase N-methyl-d-aspartate (NMDA) receptor levels, resulting in a rise in Ca2+ influx and induction of excitotoxicity. Glutamate excitotoxicity is associated with failure in the maintenance of calcium homeostasis, mitochondrial dysfunction, and production of reactive oxygen species (ROS). Valproic acid (VPA) is widely used for the management of bipolar disorder, epilepsy, and migraine headaches, and is known to regulate NMDA receptor activity. In this study, we examined the beneficial effects of VPA in a salicylate-induced tinnitus model in vitro and in vivo. Cells were pretreated with VPA followed by salicylate treatment. The expression levels of NMDA receptor subunit NR2B, phosphorylated cAMP response element-binding protein-an apoptosis marker, and intracellular levels of ROS were measured using several biochemical techniques. We observed increased expression of NR2B and its related genes TNFα and ARC, increased intracellular ROS levels, and induced expression of cleaved caspase-3. These salicylate-induced changes were attenuated in the neuronal cell line SH-SY5Y and rat cortical neurons after VPA pretreatment. Together, these results provide evidence of the beneficial effects of VPA in a salicylate-induced temporary hearing loss and tinnitus model.


Assuntos
Fármacos Neuroprotetores/farmacologia , Salicilatos/farmacologia , Zumbido/induzido quimicamente , Zumbido/tratamento farmacológico , Ácido Valproico/farmacologia , Animais , Linhagem Celular Tumoral , Ácido Glutâmico/metabolismo , Humanos , Masculino , Neurônios/efeitos dos fármacos , Neurônios/metabolismo , Ratos , Ratos Sprague-Dawley , Espécies Reativas de Oxigênio/metabolismo , Receptores de N-Metil-D-Aspartato/metabolismo , Zumbido/metabolismo
3.
Trop Anim Health Prod ; 53(3): 347, 2021 Jun 06.
Artigo em Inglês | MEDLINE | ID: mdl-34091779

RESUMO

The aim of this study was to identify candidate genes associated with milk fat per cent and fatty acid (FA) composition in Vrindavani cattle using the Illumina 50 K single-nucleotide polymorphism (SNP) array. After quality control, a total of 41,427 informative and high-quality SNPs were used for a genome-wide association study (GWAS) for milk fat percentage and 16 different types of fatty acids. Lactation stage, parity, test day milk yield, and proportion of exotic inheritance were included as fixed effects in the GWAS model. A total of 67 genome-wide significant (P < 1.20 × 10-06) SNPs and 176 suggestive significant (P < 2.41 × 10-05) SNPs were identified. Out of these, 15 SNPs were associated with more than one trait. The strongest associations were found on BTA14 for milk fat percentage and on BTA2 and BTA16 for polyunsaturated fatty acids. Several significant SNPs were identified close to or within the genes ELOVL6, FABP4, PMP2, PLIN1, MFGE8, GHRL2, and LDLRAD3 which are known to be associated with fat percentage and FA composition in dairy cattle breeds. This study is a step forward to better characterize the molecular mechanisms of phenotypic variation in milk fatty acids in a taurine-indicine composite cattle breed reared in tropical environments.


Assuntos
Ácidos Graxos , Leite , Animais , Bovinos/genética , Feminino , Estudo de Associação Genômica Ampla/veterinária , Genótipo , Lactação , Fenótipo , Polimorfismo de Nucleotídeo Único , Gravidez
4.
Trop Anim Health Prod ; 53(1): 14, 2020 Nov 19.
Artigo em Inglês | MEDLINE | ID: mdl-33211188

RESUMO

In the present investigation, differentially expressed genes (DEGs) were studied using RNA sequencing (RNA-seq) technique in porcine peripheral blood mononuclear cells (PBMC) of weaned Ghurrah and crossbred piglets at 3-month age. Transcriptomic analysis was done using three different packages, namely, EBSeq, DESeq2, and edgeR, to identify the DEGs between Ghurrah and crossbred piglets. Total 7717 DEGs were commonly identified by all three packages, out of which 4151 genes found to be up-regulated, and 3566 genes were down-regulated. Functional annotation of these DEGs indicated metabolism as the most commonly enriched category followed by the immune response. Genes related to metabolism and growth were up-regulated in crossbred piglets as compared with Ghurrah piglets, whereas immunity-related genes were up-regulated in Ghurrah piglets elucidating the disease resistance nature of this indigenous breed over crossbred counterparts. Further, eight DEGs, namely, LRP-1, ADCY4, ERRFI1, LDHD, ARG1, OASL, MGARP, and S100A8, were validated by qRT-PCR in a separate set of biological samples and found to be in concordance with RNA-seq results. Finding in the present study provides insight into genes and their molecular mechanisms governing difference in growth performance between Ghurrah and crossbred pigs.


Assuntos
Resistência à Doença/genética , Perfilação da Expressão Gênica/veterinária , Expressão Gênica , Leucócitos Mononucleares/metabolismo , Sus scrofa/genética , Animais , Índia , Análise de Sequência de RNA/veterinária , Sus scrofa/crescimento & desenvolvimento , Desmame
5.
Trop Anim Health Prod ; 52(1): 445-452, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31313018

RESUMO

Rotavirus A (RVA) infections are known to retard the piglets' growth and minimize the profit to the pig farming community. Between August 2014 and July 2017, in a cross-sectional study, we surveyed 13 organized pig farms located in the eight states of India representing northern, north-eastern and southern regions, to identify the risk factors associated with RVA infection in pre- and post-weaning piglets. Faecal samples (n = 411) comprising of non-diarrhoeic (n = 320) and diarrhoeic (n = 91) were collected and screened for RVA infection using VP6 gene-based RT-PCR. RVA positivity of 52.5% (168/320) in non-diarrhoeic and 59.3% (54/91) in diarrhoeic piglets was noticed. Further, 53.3% (120/225) and 54.8% (102/186) of the samples from pre- and post-weaned samples were positive for RVA, respectively. To note, no statistically significant association was noticed between RVA infection, health and weaning status. Additionally, a questionnaire-based survey was conducted to identify the risk factors for RVA infections in piglets. The analysis revealed that good ventilation (OR 0.2, 95% CI 0.15-0.39), use of deep well water (OR 0.2, 95% CI 0.13-0.43) and feeding of commercial feed (OR 0.3, 95% CI 0.18-0.41) were associated with reduced risk of RVA infection compared with poor ventilation, use of shallow well water and feeding of own milled feed, respectively. Contrarily, mixed farms (OR 2.1, 95% CI 1.26-3.37), use of heater or cooler (OR 5.9, 95% CI 3.74-9.30), sheds in different elevation (OR 2.5, 95% CI 1.20-5.01) and weekly and occasional use of disinfectant for surface cleaning (OR 1.8, 95% CI 1.12-2.96) were associated with higher RVA infection. Mitigating the risk factors might help in better health management of piglets and increase the economic return to pig farming community in the country.


Assuntos
Infecções por Rotavirus/veterinária , Rotavirus/fisiologia , Doenças dos Suínos/epidemiologia , Animais , Estudos Transversais , Diarreia/epidemiologia , Diarreia/veterinária , Diarreia/virologia , Fezes/virologia , Índia/epidemiologia , Prevalência , Fatores de Risco , Infecções por Rotavirus/epidemiologia , Infecções por Rotavirus/virologia , Suínos , Doenças dos Suínos/virologia
6.
Nanotechnology ; 28(10): 105706, 2017 Mar 10.
Artigo em Inglês | MEDLINE | ID: mdl-28106004

RESUMO

Nanofluids-engineered colloidal suspensions in base liquids-have captivated the interest of researchers over the last two decades for various existing as well as emerging technological applications. The main impetus for the synthesis of such novel nanocomposite liquids is the potential to alter properties of the base liquid, such as its viscosity, thermal conductivity, and surface tension, and to introduce specific optical and magnetic properties. Numerous studies suggest trends and explanations for the effects associated with the addition of nanoparticles, and that deviation from the base liquid properties are dependent on nanoparticle concentration. However, there remains a certain ambiguity in the available literature. The wetting behavior and surface tension of nanofluids are particular examples where highly conflicting results exist. In this study, we used multi-walled carbon nanotubes (MWCNTs) functionalized by plasma treatment and dispersed in reverse osmosis water and 99% anhydrous ethanol. Our observations reveal that the surface tension and wetting behavior of the stable aqueous and ethanol-based nanofluids containing plasma functionalized MWCNTs are unaffected by the MWCNT loading up to 120 (0.012) and ∼210 (0.021) ppm (vol%), respectively. The ethanol-based MWCNT nanofluids allowed us to extend the study to higher loadings, and a linear increase of the surface tension past ∼200 ppm was observed. Conversely, nanofluids containing non-functionalized or surfactant-stabilized MWCNTs show drastically different contact angle values when compared to the base liquids even at very low concentrations (less than 100 ppm). We demonstrate that the stability of nanofluid and method of stabilization are crucial parameters in determining the wetting behavior of nanofluids.

7.
Curr Opin Ophthalmol ; 28(5): 416-429, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28650875

RESUMO

PURPOSE OF REVIEW: The purpose of this review is to outline those systemic disorders that are associated with pediatric retinal dystrophy, summarize important retinal, and nonretinal clues that aid in syndromic diagnosis, provide an approach for ophthalmic and systematic systemic examination, describe the important systemic findings seen in pediatric syndromic retinal dystrophies and highlight the role of genetic testing. RECENT FINDINGS: With profound advances being made in the field of molecular genetics, a definitive molecular etiology is increasingly being made even in rare and unusual forms of retinal dystrophies. Early recognition and precise diagnosis of a syndromic association has major clinical implications. It not only ensures early and holistic care to the child but also provides an opportunity for the parents in better understanding the nature and course of the disorder. It greatly aids in genetic counseling. SUMMARY: Many syndromic retinal dystrophies may present initially to the ophthalmologist long before they present to the pediatrician with systemic symptoms. The intent of this article is to act as a resource in assisting the ophthalmologist to arrive at an early systemic diagnosis.


Assuntos
Técnicas de Diagnóstico Oftalmológico , Diagnóstico Precoce , Testes Genéticos/métodos , Distrofias Retinianas/diagnóstico , Criança , Humanos , Distrofias Retinianas/genética , Síndrome
8.
Anim Biotechnol ; 27(4): 303-9, 2016 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-27565875

RESUMO

Innate immune mechanism plays a key role in mammary defense, from recognition of pathogens to activation of nonspecific and specific immunity involved in elimination of pathogens. Expression profiles of innate immune response genes namely Toll like receptor 2 (TLR-2), Peptidoglycan recognition protein 1 (PGLYRP-1), Interleukin 8 receptor (IL-8 R), L-Selectin (SELL), and Osteopontin (OPN) in milk somatic cells of subclinical mastitis (SCM) affected crossbred cows were investigated under this study at transcript level using quantitative real time polymerase chain reaction (qRT-PCR). Dairy cows in mid lactation were screened for SCM using California Mastitis Test (CMT), Somatic Cell Count (SCC) and Electrical Conductivity test (EC). Based on results of SCM screening tests, crossbred cows were clustered into two groups with four Staphylococcus aureus infected SCM cows and four apparently healthy cows. The expressions levels of TLR-2, PGLYRP-1, IL-8 R, SELL, and OPN in milk somatic cells of SCM affected cows were significantly higher (p < 0.05) than healthy cows. These genes could be considered as candidate genes for innate immune response against S. aureus SCM infection.


Assuntos
Imunidade Inata , Mastite Bovina/imunologia , Leite/citologia , Leite/imunologia , Animais , Bovinos , Células Cultivadas , Citocinas/análise , Citocinas/genética , Citocinas/metabolismo , Feminino , Perfilação da Expressão Gênica , Imunidade Inata/genética , Imunidade Inata/imunologia , Selectina L/análise , Selectina L/genética , Selectina L/metabolismo , Receptor 2 Toll-Like/análise , Receptor 2 Toll-Like/genética , Receptor 2 Toll-Like/metabolismo
9.
Plant Dis ; 99(4): 442-446, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-30699550

RESUMO

Soybean mosaic virus (SMV), belonging to the genus Potyvirus of the family Potyviridae, has a relatively narrow host range almost exclusively confined to leguminous hosts. While disease management through genetic transformation can be an effective approach, soybean remains recalcitrant to routine genetic transformation. In this context, it is important to identify new hosts for SMV that can be used to develop effective transgenic resistance strategies. Transformation in Nicotiana benthamiana is simple and highly efficient; hence, here we demonstrate the infectivity of SMV strain SC7 in N. benthamiana plants. To identify an SMV strain infectious in N. benthamiana, we mechanically inoculated N. benthamiana plants with 37 isolates from 21 (SC1 to SC21) SMV strains. Plants inoculated with isolates of strain SC7 produced mosaic symptoms on leaves. However, N. benthamiana plants inoculated with the 20 other SMV strains showed no visible symptoms. Furthermore, soybean cv. Nannong 1138-2 inoculated with sap prepared from symptomatic N. benthamiana leaves showed typical SMV mosaic symptoms 2 weeks after inoculation. In addition, SMV was detected in symptomatic N. benthamiana and soybean leaves by RT-PCR, DAS-ELISA, and further identified by sequencing. Together, the results indicate that N. benthamiana plants could support multiplication of SMV strain SC7. The findings of this study would be useful for the investigation of SMV resistance using the model plant N. benthamiana.

10.
Ophthalmology ; 121(1): 392-398, 2014 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23972321

RESUMO

PURPOSE: To report a new ocular manifestation of the dup22q11 syndrome and explore involved genes that may offer insight to mechanisms of pathogenesis. DESIGN: Case series. PARTICIPANTS: Two male patients with this syndrome diagnosed with dup22q11.2. METHODS: Medical records were reviewed. Duplication was detected in the oligo-single nucleotide polymorphism chromosomal microarray and duplicated genes within the segment where determined by literature and database review. Potential associations between the ophthalmologic manifestations and their physiopathology were investigated. MAIN OUTCOME MEASURES: Microarray results and identification of candidate genes within the duplicated segment. RESULTS: Our patients demonstrate previously unreported findings of dup22q11.2, including Marcus Gunn jaw winking, Duane's retraction syndrome, and other abnormal eye movements consistent with a congenital cranial dysinnervation disorder (CCDD), retinal vascular tortuosity, and primary infantile glaucoma. The duplicated segment in case 1 includes SNAP29, which could be linked with the development of retinal vascular tortuosity, and MAPK1, which seems to play a role in axonal development through the semaphorin pathway, which may serve as a candidate gene for CCDD. In case 2, the CLDN5 gene is within the duplicated segment. CLDN5 could be involved in the pathophysiology of glaucoma. CONCLUSIONS: Our cases expand the ocular phenotype for duplication of 22q11 and serve to identify potential candidate genes for the development of CCDD, retinal vascular tortuosity, and glaucoma.


Assuntos
Anormalidades Múltiplas/diagnóstico , Blefaroptose/diagnóstico , Aberrações Cromossômicas , Síndrome de DiGeorge/diagnóstico , Síndrome da Retração Ocular/diagnóstico , Glaucoma/diagnóstico , Cardiopatias Congênitas/diagnóstico , Anormalidades Maxilomandibulares/diagnóstico , Doenças do Sistema Nervoso/diagnóstico , Doenças Retinianas/diagnóstico , Vasos Retinianos/patologia , Anormalidades Múltiplas/genética , Blefaroptose/genética , Criança , Duplicação Cromossômica/genética , Cromossomos Humanos Par 22/genética , Claudina-5/genética , Hibridização Genômica Comparativa , Síndrome de DiGeorge/genética , Síndrome da Retração Ocular/genética , Glaucoma/genética , Cardiopatias Congênitas/genética , Humanos , Pressão Intraocular , Anormalidades Maxilomandibulares/genética , Masculino , Análise em Microsséries , Proteína Quinase 1 Ativada por Mitógeno/genética , Doenças do Sistema Nervoso/genética , Polimorfismo de Nucleotídeo Único , Proteínas Qb-SNARE/genética , Proteínas Qc-SNARE/genética , Reflexo Anormal/genética , Doenças Retinianas/genética
11.
Genet Mol Res ; 13(1): 806-18, 2014 Feb 07.
Artigo em Inglês | MEDLINE | ID: mdl-24615045

RESUMO

Here, we aimed to clone and identify the GmIMT1 gene related to the salt stress response in soybean. The full-length cDNA sequence of the GmIMT1 gene was amplified in soybean using degenerate primers of Mesembrythmum crystallium. To understand the stress response, the GmIMT1 gene was cloned and sequenced. Then, the expression vectors of the gene were constructed, and introduced into the model plant Arabidopsis thaliana through Agrobacterium mediated transformation, and the salt tolerance was analyzed in the transgenic plants. In addition, the expression patterns of GmIMT1 gene in soybean were analyzed. The expression was examined in different organs (roots, leaves, flower seeds, and stem) and under different stress conditions (drought, high salt, low temperature, salicylic acid, ethane, abscisic acid, and methyl jasmonate) by real-time fluorescent quantitative polymerase chain reaction analysis. The results showed that the root, leaves, and stems exhibited high level of GmIMT1 gene expression, whereas there was no expression in the seeds. In addition, the GmIMT1 gene expression was upregulated under all stress conditions. Overall, the results clearly indicate that GmIMT1 might be involved in multiple plant response pathways to the different environmental conditions. Furthermore transgenic plants exhibited higher salt-tolerance compared to wild type plants.


Assuntos
Arabidopsis/genética , Glycine max/genética , Metiltransferases/genética , Estresse Fisiológico/genética , Clonagem Molecular , Secas , Regulação da Expressão Gênica de Plantas , Metiltransferases/biossíntese , Folhas de Planta/genética , Raízes de Plantas/genética , Plantas Geneticamente Modificadas , Glycine max/crescimento & desenvolvimento
12.
Vet Res Commun ; 48(2): 941-953, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38017322

RESUMO

The host genetic makeup plays a significant role in causing the within-breed variation among individuals after vaccination. The present study was undertaken to elucidate the genetic basis of differential immune response between high and low responder Landlly (Landrace X Ghurrah) piglets vis-à-vis CSF vaccination. For the purpose, E2 antibody response against CSF vaccination was estimated in sampled animals on the day of vaccination and 21-day post-vaccination as a measure of humoral immune response. Double-digestion restriction associated DNA (ddRAD) sequencing was undertaken on 96 randomly chosen Landlly piglets using Illumina HiSeq platform. SNP markers were called using standard methodology. Genome-wide association study (GWAS) was undertaken in PLINK program to identify the informative SNP markers significantly associated with differential immune response. The results revealed significant SNPs associated with E2 antibody response against CSF vaccination. The genome-wide informative SNPs for the humoral immune response against CSF vaccination were located on SSC10, SSC17, SSC9, SSC2, SSC3 and SSC6. The overlapping and flanking genes (500Kb upstream and downstream) of significant SNPs were CYB5R1, PCMTD2, WT1, IL9R, CD101, TMEM64, TLR6, PIGG, ADIPOR1, PRSS37, EIF3M, and DNAJC24. Functional enrichment and annotation analysis were undertaken for these genes in order to gain maximum insights into the association of these genes with immune system functionality in pigs. The genetic makeup was associated with differential immune response against CSF vaccination in Landlly piglets while the identified informative SNPs may be used as suitable markers for determining variation in host immune response against CSF vaccination in pigs.


Assuntos
Peste Suína Clássica , Doenças dos Suínos , Vacinas Virais , Humanos , Suínos , Animais , Peste Suína Clássica/prevenção & controle , Peste Suína Clássica/genética , Polimorfismo de Nucleotídeo Único , Estudo de Associação Genômica Ampla/veterinária , Estudo de Associação Genômica Ampla/métodos , Imunidade Humoral , Vacinação/veterinária
13.
Curr Opin Ophthalmol ; 24(5): 438-47, 2013 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-23872817

RESUMO

PURPOSE OF REVIEW: To provide clinically relevant information regarding the evaluation and current treatment options for oculomotor nerve palsies. We survey recent literature and provide some insights into these studies. RECENT FINDINGS: Recent case reports highlight emerging new causes of oculomotor cranial nerve palsies, including sellar chordoma, odontogenic abscess, nonaneurysmal subarachnoid hemorrhage, polycythemia, sphenoiditis, neurobrucellosis, interpeduncular fossa lipoma, metastatic pancreatic cancer, leukemia, and lymphoma. Surgical studies have focused on modifications and innovations regarding strabismus surgery for this condition. New globe fixation procedures may include fixation to the medial orbital wall by precaruncular and retrocaruncular approaches, apically based orbital bone periosteal flap fixation and the suture/T-plate anchoring platform system. SUMMARY: Management of oculomotor nerve palsy depends in part upon the underlying cause and anatomical location of the lesion. Careful clinical evaluation and appropriate imaging can identify a definitive cause in most cases. Surgical options depend on the number, extent, and severity of the muscles involved as well as the presence or absence of signs of aberrant regeneration. The clinician should also address issues that arise due to involvement of the pupil and accommodation. Strabismus surgery can be challenging but also rewarding with appropriate selection and staging of procedures.


Assuntos
Técnicas de Diagnóstico Oftalmológico , Doenças do Nervo Oculomotor/diagnóstico , Doenças do Nervo Oculomotor/cirurgia , Procedimentos Cirúrgicos Oftalmológicos , Humanos , Estrabismo/diagnóstico , Estrabismo/cirurgia
14.
Nucleic Acids Res ; 39(Database issue): D1085-94, 2011 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21076153

RESUMO

Now in its 10th year, the Gramene database (http://www.gramene.org) has grown from its primary focus on rice, the first fully-sequenced grass genome, to become a resource for major model and crop plants including Arabidopsis, Brachypodium, maize, sorghum, poplar and grape in addition to several species of rice. Gramene began with the addition of an Ensembl genome browser and has expanded in the last decade to become a robust resource for plant genomics hosting a wide array of data sets including quantitative trait loci (QTL), metabolic pathways, genetic diversity, genes, proteins, germplasm, literature, ontologies and a fully-structured markers and sequences database integrated with genome browsers and maps from various published studies (genetic, physical, bin, etc.). In addition, Gramene now hosts a variety of web services including a Distributed Annotation Server (DAS), BLAST and a public MySQL database. Twice a year, Gramene releases a major build of the database and makes interim releases to correct errors or to make important updates to software and/or data.


Assuntos
Bases de Dados Genéticas , Genoma de Planta , Plantas/genética , Mapeamento Cromossômico , Genes de Plantas , Variação Genética , Genômica , Redes e Vias Metabólicas , Plantas/metabolismo , Locos de Características Quantitativas , Sintenia
15.
Antioxidants (Basel) ; 12(12)2023 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-38136198

RESUMO

The accumulation of oxidative stress is one of the important factors causing cellular senescence. Oxymatrine (OM) is a natural quinolizidine alkaloid compound known for its antioxidant effects. This study aimed to investigate the anti-senescence potential of OM through oxidative stress-induced in vitro and in vivo models. By treating 600 µM of H2O2 to the HT22 mouse hippocampal neuronal cell line and by administering 150 mg/kg D-galactose to mice, we generated oxidative stress-induced senescence models. After providing 1, 2, and 4 µg/mL of OM to the HT22 mouse cell line and by administering 50 mg/kg OM to mice, we evaluated the enhancing effects. We evaluated different senescence markers, AMPK activity, and autophagy, along with DCFH-DA detection reaction and behavioral tests. In HT22 cells, OM showed a protective effect. OM, by reducing ROS and increasing p-AMPK expression, could potentially reduce oxidative stress-induced senescence. In the D-Gal-induced senescence mouse model, both the brain and heart tissues recovered AMPK activity, resulting in reduced levels of senescence. In neural tissue, to assess neurological recovery, including anxiety symptoms and exploration, we used a behavioral test. We also found that OM decreased the expression level of receptors for advanced glycation end products (RAGE). In heart tissue, we could observe the restoration of AMPK activity, which also increased the activity of autophagy. The results of our study suggest that OM ameliorates oxidative stress-induced senescence through its antioxidant action by restoring AMPK activity.

16.
Mech Ageing Dev ; 204: 111676, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35489615

RESUMO

The abundance of the biological data and the rapid evolution of the newer machine learning technologies have increased the epigenetics research in the last decade. This has enhanced the ability to measure the biological age of humans and different organisms via their omics data. DNA methylation array data are commonly used in the prediction of methylation age. Horvath clock has been adopted in various aging studies as a DNA methylation age predicting clock due to its higher accuracy and multi tissue prediction potential. In the current study, we have developed a pan tissue methylation-aging clock by using the publicly available illumina 450k and EPIC array methylation datasets. In doing that, we developed a highly accurate epigenetic clock, which predicts the age of multiple tissues with higher accuracy. We have also analyzed the selected probes for their biological relevance. Upon analyzing the selected features further, we found out evidences, which support the Antagonistic pleiotropy theory of aging.


Assuntos
Metilação de DNA , Epigenômica , Envelhecimento/genética , Ilhas de CpG , Epigênese Genética , Epigenômica/métodos , Humanos , Aprendizado de Máquina
17.
Exp Neurobiol ; 31(4): 232-242, 2022 Aug 31.
Artigo em Inglês | MEDLINE | ID: mdl-36050223

RESUMO

Tinnitus is the perception of phantom noise without any external auditory sources. The degeneration of the function or activity of the peripheral or central auditory nervous systems is one of the causes of tinnitus. This damage has numerous causes, such as loud noise, aging, and ototoxicity. All these sources excite the cells of the auditory pathway, producing reactive oxygen species that leads to the death of sensory neural hair cells. This causes involuntary movement of the tectorial membrane, resulting in the buzzing noise characteristic of tinnitus. Autophagy is an evolutionarily conserved catabolic scavenging activity inside a cell that has evolved as a cell survival mechanism. Numerous studies have demonstrated the effect of autophagy against oxidative stress, which is one of the reasons for cell excitation. This review compiles several studies that highlight the role of autophagy in protecting sensory neural hair cells against oxidative stress-induced damage. This could facilitate the development of strategies to treat tinnitus by activating autophagy.

18.
Plant Physiol ; 153(4): 1479-91, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20522724

RESUMO

Metabolic networks reconstructed from sequenced genomes or transcriptomes can help visualize and analyze large-scale experimental data, predict metabolic phenotypes, discover enzymes, engineer metabolic pathways, and study metabolic pathway evolution. We developed a general approach for reconstructing metabolic pathway complements of plant genomes. Two new reference databases were created and added to the core of the infrastructure: a comprehensive, all-plant reference pathway database, PlantCyc, and a reference enzyme sequence database, RESD, for annotating metabolic functions of protein sequences. PlantCyc (version 3.0) includes 714 metabolic pathways and 2,619 reactions from over 300 species. RESD (version 1.0) contains 14,187 literature-supported enzyme sequences from across all kingdoms. We used RESD, PlantCyc, and MetaCyc (an all-species reference metabolic pathway database), in conjunction with the pathway prediction software Pathway Tools, to reconstruct a metabolic pathway database, PoplarCyc, from the recently sequenced genome of Populus trichocarpa. PoplarCyc (version 1.0) contains 321 pathways with 1,807 assigned enzymes. Comparing PoplarCyc (version 1.0) with AraCyc (version 6.0, Arabidopsis [Arabidopsis thaliana]) showed comparable numbers of pathways distributed across all domains of metabolism in both databases, except for a higher number of AraCyc pathways in secondary metabolism and a 1.5-fold increase in carbohydrate metabolic enzymes in PoplarCyc. Here, we introduce these new resources and demonstrate the feasibility of using them to identify candidate enzymes for specific pathways and to analyze metabolite profiling data through concrete examples. These resources can be searched by text or BLAST, browsed, and downloaded from our project Web site (http://plantcyc.org).


Assuntos
Bases de Dados Genéticas , Genoma de Planta , Redes e Vias Metabólicas/genética , Populus/genética , Arabidopsis/enzimologia , Arabidopsis/genética , Populus/enzimologia
19.
Mol Cell Biochem ; 349(1-2): 11-9, 2011 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-21116690

RESUMO

Caffeic acid (3,4-dihydroxy cinnamic acid) (CA) is naturally found in fruits, vegetables, olive oil, and coffee. This study was undertaken to evaluate the anticancer effect of caffeic acid on HT-1080 human fibrosarcoma cell line. The antiproliferative effect of caffeic acid was determined by MTT assay, and the oxidative stress was determined by lipid peroxidation, changes in the enzymatic, and non-enzymatic antioxidant status. To understand the mode of antiproliferative effect of CA, the authors observed intracellular ROS levels by DCFH-DA method, mitochondrial membrane potential alterations by Rh-123 staining, oxidative DNA damage by comet assay, and apoptotic morphological changes by AO/EtBr-staining method. The results show that caffeic acid enhances lipid peroxidative markers such as TBARS, CD, and LHP in HT-1080 cell line. Caffeic acid enhances the ROS levels, which is evidenced by the increased DCF fluorescence. Further, caffeic acid treatment altered the mitochondrial membrane potential in HT-1080 cells. Similarly, the authors observed increased oxidative DNA damage (% Tail DNA, % Tail length, Tail moment, and olive tail moment), and apoptotic morphological changes in caffeic acid-treated groups. These data suggest that caffeic acid exhibits potent anticancer effect in HT-1080 cell line, and that it may be used as an anticancer agent.


Assuntos
Antineoplásicos/farmacologia , Ácidos Cafeicos/farmacologia , Proliferação de Células/efeitos dos fármacos , Oxidantes/farmacologia , Apoptose/efeitos dos fármacos , Catalase/metabolismo , Linhagem Celular Tumoral , Fragmentação do DNA , Fibrossarcoma , Glutationa/metabolismo , Glutationa Peroxidase/metabolismo , Humanos , Peroxidação de Lipídeos/efeitos dos fármacos , Potencial da Membrana Mitocondrial , Oxirredução , Estresse Oxidativo , Espécies Reativas de Oxigênio/metabolismo , Superóxido Dismutase/metabolismo
20.
J Biomater Sci Polym Ed ; 32(4): 438-453, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33091325

RESUMO

This article describes synthesis, characterization, antimicrobial, drug-releasing and anti-cancer activity of acrylate monomer and its polymer containing chalcone moiety. The synthesized polymers were characterized through IR, 1H NMR and UV-visible spectroscopy techniques. The molecular weight of the obtained polymer is found to be around 4000 g/mol. The synthesized polymers are thermally stable up to 260 °C. The monomer and its polymer show higher activity against gram-negative bacteria and these compounds show remarkable activity over breast cancer cells. The synthesized monomer and polymers showed higher anticancer activity. The inhibitory potential of monomers and polymers premeditated using optimized in vitro evaluation MTT assay and live cell images. The drug release potential was controlled through co-monomer, pH and temperature.


Assuntos
Anti-Infecciosos , Chalcona , Chalconas , Acrilatos , Anti-Infecciosos/farmacologia , Liberação Controlada de Fármacos , Polímeros
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