Ayan Roy

Ayan Roy
Columbia University | CU

Doctor of Philosophy

About

47
Publications
8,356
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
350
Citations

Publications

Publications (47)
Article
Bamboo rats (Rhizomys pruinosus) are among the few mammals that lives on a bamboo-based diet which is mainly composed of lignocellulose. However, the mechanisms of adaptation of their gut microbiome and metabolic systems in the degradation of lignocellulose are largely unknown. Here, we conducted a multi-omics analysis on bamboo rats to investigate...
Article
Full-text available
Objective Drug induced hepatocyte death is a major contributor to acute liver failure. We aimed to determine whether β-sitosterol conjugated silver nanoparticles (BSAgNPs) could ameliorate carbon tetrachloride (CCl4)-induced liver injury in Swiss albino mice. Methods Biogenic silver nanoparticles were synthesized from β-sitosterol to produce β-sit...
Article
Full-text available
The continuous spread and evolution of the severe acute respiratory syndrome coronavirus 2 (SARS‐CoV‐2), and the rapid surge in infection cases in the coronavirus disease 2019 (COVID‐19) evoke a dire need for effective therapeutics. In this study, we explored the inhibitory potential of a library of 605 phytocompounds, selected from Indian medicina...
Article
Full-text available
Profilin protein is present ubiquitously in all forms of life and is allied with allergic responses among atopic individuals. In addition to this, profilins from various food sources are also associated with IgE cross-reactivity and are thus classified as pan-allergens. The present study unravels the physicochemical basis of differential amino acid...
Article
Full-text available
Background Early gut microbial colonization is important for postnatal growth and immune development of the chicken. However, at present, commercial chickens are hatched and raised without adult hens, thus are cut off from the microbiota transfer between hens and chicks. In this study, we compared the gut microbiota composition between hen-reared a...
Article
Full-text available
Although comprehensive exertions have been made in late decades for treating advanced lung cancer with inclusive therapies but efficient anti-lung cancer therapeutics are statically inadequate in the clinics. Hence, compelling novel anti-lung cancer drugs are considerably desired. This backdrop enticed us to unveil anticancer efficacy of astrakurku...
Article
The annually recurrent seasonal influenza viruses, namely, influenza A viruses (H1N1/pdm2009 and H3N2) and influenza B viruses, contribute substantially to human disease burden. Elucidation of host adaptation, population dynamics and evolutionary patterns of these viruses contribute to better control of current epidemic situation and bolster effort...
Article
Full-text available
The emergence of COVID-19 continues to pose severe threats to global public health. The pandemic has infected over 171 million people and claimed more than 3.5 million lives to date. We investigated the binding potential of antiviral cyanobacterial proteins including cyanovirin-N, scytovirin and phycocyanin with fundamental proteins involved in att...
Article
Full-text available
Since its first isolation in around 2007, the avian-origin H3N2 canine influenza virus (CIV) has become established and continues to circulate in dog populations. This virus serves as a useful model for deciphering the complex evolutionary process of interspecies transmission of influenza A virus (IAV) from one species to its subsequent circulation...
Article
Full-text available
The novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been spreading rapidly all over the world and has raised grave concern globally. The present research aims to conduct a robust base compositional analysis of SARS-CoV-2 to reveal adaptive intricacies to the human host. Multivariate statistical analysis revealed a complex int...
Article
Full-text available
The advent of COVID-19 has kept the whole world on their toes. Countries are maximizing their efforts to combat the virus and to minimize the infection. Since infectious microorganisms may be transmitted by variety of routes, respiratory and facial protection is required for those that are usually transmitted via droplets/aerosols. Therefore this p...
Article
Full-text available
Unfortunately, in the published paper entitled "Comprehensive profiling of functional attributes, virulence potential and evolutionary dynamics in mycobacterial secretomes" authored by Ayan Roy, Arnab Sen, Sourav Chakrabarty and Indrani Sarkar, the surname of Sourav Chakraborty was inadvertently wrongly written as Sourav Chakrobarty in the original...
Article
Full-text available
The coronavirus disease 2019 (COVID-19) pandemic, caused by the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), presents an unprecedented challenge to global public health with researchers striving to find a possible therapeutic candidate that could limit the spread of the virus. In this context, the present study employed an in...
Article
Full-text available
Ocular cells like, retinal pigment epithelium (RPE) is a highly specialized pigmented monolayer of post-mitotic cells, which is located in the posterior segment of the eye between neuro sensory retina and vascular choroid. It functions as a selective barrier and nourishes retinal visual cells. As a result of high-level oxygen consumption of retinal...
Article
Full-text available
Ebola virus (EBOV) has caused several outbreaks as the consequence of spillover events from zoonotic sources and has resulted in huge death tolls. In spite of considerable progress, a thorough know-how regarding EBOV adaptation in various host species and detailed information about the potential reservoirs of EBOV still remains obscure. The present...
Preprint
Coronavirus Disease 2019 (COVID-19) has grown to be global public health emergency. The biosurfactants (BSs) are surface-active biomolecules with unique properties and wide applications. Several microbes synthesize secondary metabolites with surface-active properties which has wide range of anti-inflammatory and anti-viral role.. The monocytes and...
Article
The fungal genus Cryptococcus comprises of several diverse species. The pathogens forming Cryptococcus neoformans/ Cryptococcus gatti species complex are of immense clinical significance owing to the high frequency of infections and deaths globally. Three closely related non-pathogenic species namely, Cryptococcus amylolentus, Cryptococcus wingfiel...
Chapter
Full-text available
The emergence of High-throughput sequencing and its implication in the analysis of microbial population has introduced a new area of scientific research-metagenomics. Metagenomic analysis has brought a revolution in various fields of biological research, notably drug discovery. The term refers to the collective examination of genome analysis of unc...
Article
Full-text available
Clerodendrum inerme is a perennial shrub belonging to the family Lamiaceae and is used in many of the herbal preparations of Siddha and Ayurveda in India. Ethnomedicinally, the leaves of this plant are used to cure various ailments. In spite of enormous ethnomedicinal implications, proper chemical profiling and characterization of isolated compound...
Article
Full-text available
A novel severe acute respiratory syndrome coronavirus (SARS-CoV-2) has emerged as the causative agent behind the coronavirus disease 2019 (COVID-19) pandemic. Treatment efforts have been severely impeded due to the lack of specific effective antiviral drugs for the treatment of COVID-associated pathologies. In the present research endeavour the inh...
Article
Full-text available
The COVID-19 pandemic caused by the novel coronavirus SARS-CoV-2 has rattled global public health, with researchers struggling to find specific therapeutic solutions. In this context, the present study employed an in silico approach to assess the inhibitory potential of the phytochemicals obtained from GC-MS analysis of twelve Clerodendrum species...
Article
HIV-1 infection in human beings has been an outcome of cross-species transmission event of simian immunodeficiency virus from chimpanzees (SIVcpz). Present study reveals differential features of envelope genes representing different categories of HIV-1 disease progression in human beings, namely, rapid progressors (RP), slow progressors (SP) and lo...
Article
Ethnopharmacological relevance: The development of selective inhibitors of monoamine oxidase B (MAO-B) has been essential in treating Parkinson's disease. However, the apparent hepatotoxicity and drug-drug interactions of current inhibitors accentuates the need for the development of novel pharmacotherapies. Crossyne guttata (L.) D. & U. Müll-Dobl...
Article
Full-text available
The fungal genus Ustilago consists of intimidating pathogens associated with disease manifestations in plants of agricultural importance and gravity. Rapid progress of genome sequencing has opened the floodgates for biological research. Availability of Ustilago genomes provides a scope to explore complex codon and amino acid usage patterns in the g...
Article
The fungal genus Puccinia, comprising of several menacing pathogens, has been a persistent peril to global agriculture. Genome sequencing of various members of Puccinia offers a scope to excavate their genomic riddles. The present study has been addressed at exploring the complex niceties of codon and amino acid usage patterns and subsequent elucid...
Article
Smoke derived karrikinolide and trimethylbutenolide exerted neuroprotective effects against monoamine oxidase and acetylcholinesterase. Synthesis of potent analogs was achieved. Sulphur substitution in the bicyclic ring structure of KAR1 displayed the most encouraging activity returning IC50 values of 13.75 ± 0.001 μM and 0.03 ± 0.02 μM for monoami...
Article
Full-text available
Clerodendrum is a plant with potent antioxidant activity and has been frequently employed as a traditional remedy against bronchitis, asthma, liver and stomach disorders. Three species of genus Clerodendrum namely Clerodendrum indicum, C. colebrookianum and C. inerme (Syn. Volkameria inermis) were investigated for their possible activity against ox...
Article
Mycobacterium is gram positive, slow growing, disease causing Actinobacteria. Beside potential pathogenic species, Mycobacterium also contains opportunistic pathogens as well as free living non-pathogenic species. Disease related various analyses on Mycobacterium tuberculosis are very widespread. However, genomic study of overall Mycobacterium spec...
Article
Full-text available
The present study has been aimed to the comparative analysis of high GC composition containing Corynebacterium genomes and their evolutionary study by exploring codon and amino acid usage patterns. Phylogenetic study by MLSA approach, indel analysis and BLAST matrix differentiated Corynebacterium species in pathogenic and non-pathogenic clusters. C...
Article
Full-text available
Mycobacterium is an interesting genus which not only includes intimidating pathogens, associated with severe devastations globally, but also comprises of non-pathogenic eco-friendly members that detoxify environmental pollutants. Secretory proteins of the mycobacterial communities are essential components which are firmly believed to facilitate pro...
Article
Full-text available
Acquired immune deficiency syndrome (AIDS) is a spectrum of conditions caused by infection with the human immunodeficiency virus (HIV). Two types of HIV have been characterized: HIV-1 and HIV-2. The present study investigated whether evolutionary selection pressure differs between rapid progressor (RP), slow progressor (SP), and long-term non-progr...
Poster
Full-text available
Our environment being stressed with heavy metals, there are abundant microbes which are found to adapt well to this condition. Codon usage studies among 1051 genes common to all five Cupriavidus/Ralstonia genomes, revealed 15 optimal codons, which are frequently used in the expressed genes. Among all Cupriavidus metallidurans CH34 that has a differ...
Article
Full-text available
Our environment is stressed with a load of heavy and toxic metals. Microbes, abundant in our environment are found to adapt well to this metal stressed condition. A comparative study among five Cupriavidus/Ralstonia genomes, can offer a better perception of their evolutionary mechanisms to adapt to these conditions. We have studied codon usage amon...
Article
Full-text available
Various strains of the genus Bifidobacterium are crucial members of the human, animal and insect gut, associated with beneficial probiotic activities. An extensive analysis on codon and amino acid usage of the GC rich genus Bifidobacterium has been executed in the present study. Multivariate statistical analysis revealed a coupled effect of GC comp...
Article
The first influenza pandemic in the 21(st) century commenced in March, 2009 causing nearly 300,000 deaths globally within the first year of the pandemic. In late 2013 and in early 2014, there was gradual increase in the reported case of H1N1 infection and according to World Health Organization (WHO) report, influenza activity increased in several a...
Article
Full-text available
Objective: The bacterial phylum Deinococcus-Thermus includes two groups of bacterial genomes i.e., radiation-resistant mesophilic Deinococcales and radiation-sensitive hyperthermophilic Thermales. Our endeavor is to address the factors influencing the niche-specific molecular evolution of this immensely interesting bacterial phylum. Methods: An ext...
Article
Full-text available
Abstract Members of the genus Mycobacterium are notorious for their pathogenesis. Investigations from various perspectives have identified the pathogenic strategies employed by these lethal pathogens. Secretomes are believed to play crucial roles in host cell recognition and cross-talks, in cellular attachment, and in triggering other functions rel...
Article
Full-text available
The 2009 H1N1 swine flu is the first pandemic in decades. Infectivity of the influenza virus for human host depends largely on its ability to evade antibodies specific for viral protein called hemagglutinin (HA) that mediates attachment to the host. In the present study we analysed large number of HA gene sequences available in Flu Database maintai...
Article
Full-text available
A recently emerged novel influenza A (H1N1) virus continues to spread globally. The pandemic caused by this new H1N1 swine influenza virus presents an opportunity to analyze the evolutionary significance of the origin of the new strain of swine flu. Our study clearly suggests that strong purifying selection is responsible for the evolution of the n...

Network

Cited By

Projects

Project (1)