Publications by authors named "Ravi Kumar Gandham"

Buffalo milk is renowned for its nutritional and functional properties. Milk somatic cells protect the mammary gland, contribute to the functionality of the udder, and also aid in the health and development of newborn calves, particularly during the critical early lactation period. However, proteomic changes in buffalo milk somatic cells during the transition from colostrum to mature milk remain poorly understood.

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Introduction: Lumpy Skin Disease Virus (LSDV), an emerging pathogen from the genus, continues to challenge global livestock health with its expanding host range and genetic adaptability.

Materials And Methods: In this study, we report the first isolation and whole genome sequencing of LSDV from Bos frontalis, a semi-domesticated bovine species native to Northeast India, along with the assembly of an isolate from cattle.

Results: Time to the Most Recent Common Ancestor (TMRCA) estimates support a relatively recent common origin for Indian strains, pointing to ongoing virus circulation and regional adaptation.

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Indian desi cattle, known for their adaptability and phenotypic diversity, represent a valuable genetic resource. However, a single reference genome often fails to capture the full extent of their genetic variation. To address this, we construct a pangenome for desi cattle by identifying and characterizing non-reference novel sequences (NRNS).

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Background: The objective of this study was to assemble the mitochondrial genome of Bhadawari buffalo and do phylogenetic analysis of it. We assembled the complete mitochondrial sequence of Bhadawari buffalo de novo from short Illumina sequences generated from the paired-end library. Phylogenetic analysis was done on 24 assembled mitochondrial genomes from the Bovidae family using the Maximum Likelihood method and General Time Reversible Substitution Model.

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Background: India harbors the world's largest cattle population, encompassing over 50 distinct Bos indicus breeds. This rich genetic diversity underscores the inadequacy of a single reference genome to fully capture the genomic landscape of Indian cattle. To comprehensively characterize the genomic variation within Bos indicus and, specifically, dairy breeds, we aim to identify non-reference sequences and construct a comprehensive pangenome.

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Lameness is an economically significant, production-limiting syndrome that adversely affects the (re)production performance of animals besides deteriorating the quantity and quality aspects of milk in dairy cattle. The present study aimed to explore the potential biomarkers for painful foot lesions in indigenous Tharparkar and crossbred Vrindavani cattle affected with lameness. The differentially expressed genes in lame versus healthy animals were elucidated using microarray analysis and validated them by qRT-PCR.

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Article Synopsis
  • Japanese encephalitis virus (JEV) is a serious mosquito-borne infection that primarily affects children, leading to severe neurological issues and high mortality rates worldwide.
  • This study investigates how human macrophages respond to JEV infection by analyzing changes in protein expression over time, revealing that 443 proteins were differentially regulated, with significant upregulation of key antiviral proteins.
  • The research highlights important immune pathways activated during JEV infection, especially the type I interferon signaling pathway, offering insights that could help develop strategies for better managing this public health threat.
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Article Synopsis
  • Genotyping is the analysis of an organism's DNA to determine its genetic traits and has applications in fields like agriculture, biomedicine, and conservation.
  • Genetic markers are categorized into random markers (like RFLP and AFLP) and functional markers (like SCoT and SRAP), with the latter being less utilized in animal science despite their advantages.
  • This review provides an overview of the different genotyping markers available, their benefits and limitations, and emphasizes the need for more use of functional markers in genetic research.
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Chilika, a native buffalo breed of the Eastern coast of India, is mainly distributed around the Chilika brackish water lake connected with the Bay of Bengal Sea. This breed possesses a unique ability to delve deep into the salty water of the lake and stay there to feed on local vegetation of saline nature. Adaptation to salinity is a genetic phenomenon; however, the genetic basis underlying salinity tolerance is still limited in animals, specifically in livestock.

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Epigenetic variations result from long-term adaptation to environmental factors. The Bos indicus (zebu) adapted to tropical conditions, whereas Bos taurus adapted to temperate conditions; hence native zebu cattle and its crossbred (B indicus × B taurus) show differences in responses to heat stress. The present study evaluated genome-wide DNA methylation profiles of these two breeds of cattle that may explain distinct heat stress responses.

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Shiga toxigenic E. coli are important foodborne zoonotic pathogens. The present study was envisaged to standardize loop-mediated isothermal amplification assays targeting stx1 and stx2 genes for rapid and visual detection of STEC and compare its sensitivity with PCR.

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Dynamic nuclear architecture and chromatin organizations are the key features of the mid-prophase I in mammalian meiosis. The chromatin undergoes major changes, including meiosis-specific spatiotemporal arrangements and remodeling, the establishment of chromatin loop-axis structure, pairing, and crossing over between homologous chromosomes, any deficiencies in these events may induce genome instability, subsequently leading to failure to produce gametes and infertility. Despite the significance of chromatin structure, little is known about the location of chromatin marks and the necessity of their balance during meiosis prophase I.

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Peste des petits ruminants (PPR) is an acute, highly contagious viral disease of goats and sheep, caused by the Peste des petits ruminants virus (PPRV). Earlier studies suggest the involvement of diverse regulatory mechanisms in PPRV infection. Methylation at N6 of Adenosine called mA is a type RNA modification that influences various physiological and pathological phenomena.

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Environmental heat stress in dairy cattle leads to poor health, reduced milk production and decreased reproductive efficiency. Multiple genes interact and coordinate the response to overcome the impact of heat stress. The present study identified heat shock regulated genes in the peripheral blood mononuclear cells (PBMC).

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Article Synopsis
  • * Researchers used whole-genome sequencing to analyze 25 fat-related QTLs across various indigenous breeds and found 20 genes with nonsynonymous substitutions.
  • * A distinct SNP pattern was identified in high-milk-yielding breeds, confirming significant genetic differences in fat QTLs compared to low-milk-yielding breeds through pyrosequencing.
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N-methyladenosine (mA) modification is a major RNA epigenetic regulatory mechanism. The dynamics of mA levels in viral genomic RNA and their mRNAs have been shown to have either pro- or antiviral functions, and therefore, mA modifications influence virus-host interactions. Currently, no reports are available on the effect of mA modifications in the genome of (PPRV).

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Swine is considered as a suitable sentinel to predict Japanese encephalitis virus (JEV) outbreaks in humans. The present study was undertaken to determine the circulating genotypes of JEV in swine population of India. A total of 702 swine serum samples from four states of western, northern, northern-temperate, and north-eastern zones of India were screened by real-time RT-PCR targeting envelope gene of JEV, which showed positivity of 35.

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Lateral flow assays (LFAs) are one of the most economical, point-of-care (PoC) diagnostic assays that exploit the colorimetric properties of gold nanoparticles (AuNPs). Up to the best of our knowledge, no rapid antigen-based LFA exists for Japanese Encephalitis Virus (JEV) detection. Herein, we have reported a novel portable sandwich-type LFA for on-site detection of the non-structural 1 (NS1) secretory protein of JEV.

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Peste-des-Petits-Ruminants (PPR) or goat plague is an important viral disease of sheep and goats caused by the small ruminant morbilli virus or PPR virus (PPRV). Long non coding RNAs (lncRNA) and circular RNAs (circRNA) play a pivotal role in several biological processes including regulation of virus-host interactions. The present study explored the expression of lncRNA, circRNA and their functions in PPRV infected B-lymphocyte (B95a) cells.

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Environmental temperature is one of the major factors to affect health and productivity of dairy cattle. Gene expression networks within the cells and tissues coordinate stress response, metabolism, and milk production in dairy cattle. Epigenetic DNA methylations were found to mediate the effect of environment by regulating gene expression patterns.

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Virus infection alters host gene expression, therefore ideal and stable reference housekeeping genes are required to normalise the expression of other expressed host genes in quantitative real-time PCR (qRT-PCR). The suitable reference gene may vary in response to different viral infections in different hosts or cells. In the present study, we cultured primary lamb testis cells (LTC) and assessed the expression stability of seven widely used housekeeping genes (B2M, HMBS, HPRT1, HSP-90, POLR2A, 18s_RNA, GAPDH) as reference genes in Sheeppox virus (SPPV) infected and control (uninfected-0h) LTC at 0.

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Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a viral pathogen causing life-threatening diseases in humans. Interaction between the spike protein of SARS-CoV-2 and angiotensin-converting enzyme 2 (ACE2) is a potential factor in the infectivity of a host. In this study, the interaction of SARS-CoV-2 spike protein with its receptor, ACE2, in different hosts was evaluated to predict the probability of viral entry.

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The present investigation was performed to compare the global gene expression profile in peripheral blood mononuclear cells (PBMCs) of and crossbred ( × ) cattle. Previously, several studies revealed the disease tolerance potential of cattle but underlying genetic mechanism is still not fully explored. The PBMCs model was used for this investigation as it plays crucial role in the immune system regulation.

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(PPR) characterized by fever, sore mouth, conjunctivitis, gastroenteritis, and pneumonia, is an acute, highly contagious viral disease of sheep and goats. The role of long non-coding RNAs (lncRNAs) in PPRV infection has not been explored to date. In this study, the transcriptome profiles of virulent Peste des petits ruminants virus (PPRV) infected goat tissues - lung and spleen were analyzed to identify the role of lncRNAs in PPRV infection.

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In the present study, healthy goats and sheep ( = 5) that were confirmed negative for ruminants virus (PPRV) antibodies by monoclonal antibody-based competitive ELISA and by serum neutralization test and for PPRV antigen by s-ELISA were vaccinated with Sungri/96. A quantitative study was carried out to compare the proteome of peripheral blood mononuclear cells (PBMCs) of vaccinated goat and sheep [5 days post-vaccination (dpv) and 14 dpv] vs. unvaccinated (0 day) to divulge the alteration in protein expression following vaccination.

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