Biology subjects

Puri, V.

Publications and source records attributed to Puri, V..

5 recordsLinked to original sources

bioRxiv2026

Microsurgical Isolation and Molecular Characterization of the Mouse Left Internal Mammary Artery: Insights into Natural Resistance to Atherosclerosis

Atherosclerosis develops unevenly across the vascular tree, yet the molecular basis for this regional susceptibility remains poorly defined. The left internal mammary artery (LIMA), the most durable conduit for coronary artery bypass (CABG) surgery, is uniquely resistant to atherosclerosis in humans; however, it has never been isolated or studied in mouse models, limiting mechanistic insight into atheroprotective pathways. Here, we establish the first method to identify and isolate the murine LIMA and generate the first transcriptomic atlas of this artery. Cross-species analyses of human and mouse LIMA reveal a conserved protective signature that distinguishes the LIMA from atheroprone vessels and uncover fundamental molecular differences that govern vascular resilience. This study presents a transformative experimental platform for dissecting the determinants of atheroprotection and identifying molecular targets to improve CABG graft performance and long-term cardiovascular outcomes.

physiology↗

bioRxiv2025

Whole-body Loss of FSP27 Impairs Cognitive Function via Disruption of Neuro-Metabolic Pathways

Fat-Specific Protein 27 (FSP27), originally identified for its role in adipocyte lipid metabolism and energy homeostasis, plays a key role in regulating lipolysis and maintaining insulin sensitivity. Beyond adipose tissue, emerging studies have uncovered its involvement in hepatic and skeletal muscle function. More recently, FSP27 has also been implicated in maintaining vascular health through its influence on endothelial signaling. Despite growing insights into FSP27s systemic functions, its involvement in the central nervous system and cognitive regulation have remained unexplored. In this study, we present the first evidence that FSP27 is a critical regulator of cognitive function. Utilizing a global FSP27 knockout (Fsp27-/-) mouse model, we demonstrate that FSP27 deficiency results in significant impairments in learning, memory retention, and spatial awareness. To elucidate the underlying molecular mechanisms, genome-wide transcriptome profiling of brain tissue from Fsp27-/- mice was performed, revealing significant (P<0.05) alterations in gene expression related to neurocognition and metabolic pathways. Notably, FSP27 deletion was associated with genomic instability (P=0.05), downregulation of genes essential for axonal transport (NES=-1.91, FDR q-value=0.21), neuronal plasticity, and brain development (NES=-1.91, FDR q-value=0.28), along with signatures of disrupted systemic metabolism and elevated stress responses (NES=1.81, FDR q-value=0.20) in the brain, the processes tightly linked to cognitive dysfunction. Collectively, these findings establish FSP27 as a molecular node connecting metabolic regulation with cognitive health and identify it as a promising target for therapeutic intervention in neurodegenerative and cognitive disorders. Significance StatementFSP27, previously known for its role in lipid metabolism, is now revealed to be a critical regulator of brain function. Our study provides the first direct evidence that FSP27 supports learning and memory by maintaining neuronal integrity and regulating neurocognitive gene networks. These findings uncover an unexpected metabolic- cognitive link and position FSP27 as a promising molecular target for therapeutic strategies aimed at preventing or treating neurodegenerative and cognitive disorders.

animal behavior and cognition↗

bioRxiv2025

Land surface temperature evolution in rapidly urbanizing areas of Southeast Asia: studies from Vietnam and Cambodia

Land surface temperature (LST) is one of the crucial variables in urban microclimate studies. Satellite-based thermal data and vegetation indices, like the normalized difference vegetation index (NDVI), offer valuable insights into changes in LST and the development of urban heat islands (UHI). We analyzed the variations in LST and vegetation coverage in two rapidly urbanizing provinces, each in Southern Vietnam and Cambodia, respectively, during the 10 years between 2013 and 2024. In addition, complementary ERA5 Interim air temperature data were also used. Spatiotemporal changes in NDVI showed rapid urbanization in the eastern region of Battambang city and throughout the southern areas of Binh Duong Province. Time-series analysis indicated a consistent increase in LST in both study sites. There has been a notable increase in minimum LST since 2017 in the entire city of Battambang, whereas the central area of Battambang has become consistently warmer after 2020. The LST in southern Binh Duong gradually increased between 2014 and 2025 due to rapid urbanization and vegetation loss. The outcome of this study holds considerable importance, as the phenomenon of UHI formation has been documented in rapidly expanding cities globally, especially in Southeast Asia.

ecology↗

bioRxiv2023

Peanut Shell Carbon Nanocellulose Preparation, Analysis and Plausible Role in Regenerative Medicine Using Mesenchymal Stem Cell Line C3H10t1/2

Peanut Shell is a major agro industry waste. Cellulose, the most abundant crystalline component of naturally porous peanut shell biomass. Nanomaterial science has actively used peanut shell as a source of nanocellulose. However, there are few reports on the biocompatibility of cellulose nanocrystal based nanocomposites from agro on mesenchymal cell lines. To evaluate how mesenchymal stem cells behave onto this scaffold in vitro, cellulose nanocrystals (CNCs) made from peanut shells were combined with polyvinyl alcohol (PVA) to create tissue engineering scaffolds. SEM images illustrated that for PVA/CNC nanocomposites and clean PVA respectively, increasing the CNC concentration was accompanied with pore size enlargement. The nanocomposites three-dimensional porous structure conveyed uneven and intertwined pore structures in additionto the pore distribution. The highest relative crystallinity was observed at 10 wt% of CNCs, according to X-ray diffraction, which also showed that the relative crystallinity of the PVA with 0 and 5 wt% of CNCs was lower than that of neat PVA. In order to confirm the modifications in chemical functional groups, Fourier transform infrared spectroscopy was utilized. The non-cytotoxicity of PVA/CNC_10% was measured for cell viability during an in vitro cytotoxicity test. Additionally, the acquired PVA/biocompatibility CNCs with the Murine Mesenchymal cell line (C 3H 10T 1/2) demonstrated good cell spreading and adherence to the material surfaces. These results suggest that future research into the in vitro integration of mesenchymal cells with a PVA/CNC scaffold can prove to be a promising candidate for regenerative purposes.

bioengineering↗

bioRxiv2017

Analysis of the Aedes albopictus C6/36 genome provides insight into cell line adaptations to in vitro viral propagation

BackgroundThe 50-year old Aedes albopictus C6/36 cell line is a resource for the detection, amplification, and analysis of mosquito-borne viruses including Zika, dengue, and chikungunya. The cell line is derived from an unknown number of larvae from an unspecified strain of Aedes albopictus mosquitoes. Toward improved utility of the cell line for research in virus transmission, we present an annotated assembly of the C6/36 genome.\n\nResultsThe C6/36 genome assembly has the largest contig N50 (3.3 Mbp) of any mosquito assembly, presents the sequences of both haplotypes for most of the diploid genome, reveals independent null mutations in both alleles of the Dicer locus, and indicates a male-specific genome. Gene annotation was computed with publicly available mosquito transcript sequences. Gene expression data from cell line RNA sequence identified enrichment of growth-related pathways and conspicuous deficiency in aquaporins and inward rectifier K+ channels. As a test of utility, RNA sequence data from Zika-infected cells was mapped to the C6/36 genome and transcriptome assemblies. Host subtraction reduced the data set by 89%, enabling faster characterization of non-host reads.\n\nConclusionsThe C6/36 genome sequence and annotation should enable additional uses of the cell line to study arbovirus vector interactions and interventions aimed at restricting the spread of human disease.

genomics↗