ଜାତୀୟ ବିଜ୍ଞାନ ଶିକ୍ଷା ଏବଂ ଗବେଷଣା ପ୍ରତିଷ୍ଠାନ
ପରମାଣୁ ଶକ୍ତି ବିଭାଗ, ଭାରତ ସରକାରଙ୍କ ଏକ ସ୍ବୟଂଶାସିତ ପ୍ରତିଷ୍ଠାନ

राष्ट्रीय विज्ञान शिक्षा एवं अनुसंधान संस्थान
परमाणु ऊर्जा विभाग, भारत सरकार का एक स्वयंशासित संस्थान

National Institute of Science Education and Research
AN AUTONOMOUS INSTITUTE UNDER DAE, GOVT. OF INDIA

 

Palok Aich

Professor
Dean R&D 
 

palok.aichniser.ac.in
+91-674-2494000 > 2133

  • Biological Sciences
  • IRINS Profile
  • Since: 01-Jul-2009
  • Office: 304

Ph.D. (Saha Institute of Nuclear Physics)

Thesis topic: studied the role of bivalent magnesium ions on the mode of action of antitumor antibiotics, Mithramycin and Chromomycin.

PhD: Biophysics

PDF: Biophysics/Molecular Dynamics/Molecular Biology/LASER instrumentation

Scientist @ VIDO: Innate Mucosal Immunity

Faculty @ NISER: 

  • Use of nullclines and understanding phase-portrait of metabolome-microbiome dynamics (Biological Mathematics)
  • Role of Microbiome-Gut-Adipose-Brain Axis on innate mucosal immunity
  • Predicting resident microbiome using host metabolites (CDSCO-approved Gut Function Test→ MicrobioTx Health)
  • Precision or hyper-personalized probiotcs

  • Jury (3rd year in a row): Aegis Graham Bell Awards: The Largest
    Innovation Awards in India (https://bellaward.com/)
  • Director: NISER Homi Bhabha Incubation Foundation (NHBIF)
  • Convener:1st DAE Conclave & Platinum Jubilee Celebration, DAE. Oct
    22-26, 2024, NISER.
  • Associate Editor: J of Gerontology and Geriatrics
  • Editor-in-Chief:  Microenvironment & Microecology Research
  • Guest Editor: Metabolites (spl issue: Role of Microbial Metabolites in the Regulation of Host Immunity and Metabolism)
  • Editorial Board Member: Medicine in Microecology (Elsevier)
  • Associate Editor: Frontiers in Cellular and Infection Microbiology (section: Microbiome in Health and Disease)
  • Global Travel Award: College of Medicine, University of Saskatchewan, Canada, 2019
  • Academic Editor: PLoS One
  • Badge of Honor: Public Health, Sofia Medical Academy, Sofia, Bulgaria, 2018
  • Honorary Diploma: Medical University of Varna, Bulgaria, 2016
  • Associate Editor: Current Bioinformatics
  • Ramalingaswami Fellow: DBT-India, 2008
  • Award of Innovation: University of Saskatchewan Technology (UST Inc.) and Innovation Place, Saskatoon, SK, Canada. 2000
  • FEBS Youth (Young Scientist) Grant International School of Biological Magnetic Resonance; Advanced NATO ASI Course on "Dynamics and the Problem of Recognition in BiologicalMolecules", Sicily, Italy, 1995

@ NISER (since July 2009)

The Front Cover Art : "Reverse Biotransformation-Guided Annotation of Untargeted" (10.1021/acs.jproteome.6c00138) in Journal of Proteome Research by Smaroki S Rekha & Palok Aich.

Anil K Baidya & Palok Aich. Serum–cecal metabolome integration predicts gut microbial communities and reveals pathway-level host–microbe crosstalk under disease-induced dysbiosis. OMICS: A Journal of Integrative Biology (2026). in press.

De AJ, Upadhyaya B, Aich P. Phase-dependent Disruption of Microbiome-Metabolome Coordination Is Associated with Diet-Induced MASLD. Am J Physiol Gastrointest Liver Physiol (2026). doi: 10.1152/ajpgi.00163.2026.

Smaroki Smruti Rekha and Palok Aich. Reverse Biotransformation-Guided Annotation of Untargeted MS/MS Features: A Computational Framework for Candidate Enzyme and Gene Hypothesis Generation. Journal of Proteome Research Article ASAP (2026). https://doi.org/10.1021/acs.jproteome.6c00138

Tanuja Mohanty, Anil Baidya, and Palok Aich. Microbial Metabolomic Signatures Reveal Underlying Phenotypic Divergence in Lean and Obese Mice with MASH under identical dietary stress. Journal of the American Society for Mass Spectrometry (2026). https://doi.org/10.1021/jasms.6c00069

Rabmit Das, Pranavesh Mourouganad, and Palok Aich. Machine Learning Analysis of Serum Metabolomics for Multi-Disease Classification and Proteome–Metabolome Pathway Insights in T2D, IBD, and CRC. Journal of Proteome Research (2026) Article ASAP https://doi.org/10.1021/acs.jproteome.5c01212

Das, Ankita, Rabmit Das, Arjoyeeta Das, and Palok Aich. Microbiome- Metabolome Signatures and Behavioral Alterations in a Progressive MPTP-induced Mouse Model of Parkinson's Disease. Experimental Neurology 400, (2026): 115701. https://doi.org/10.1016/j.expneurol.2026.115701 

Snehanjali Puhan, Smaroki Smruti Rekha, Kartika Sahu, Tanuja Mohanty, Arka Jyoti De, Ankita Das, and Palok Aich. Visiting MASLD through the lens of sex, immunity, and microbial interactions. Discov Med 2, 236 (2025). https://doi.org/10.1007/s44337-025-00489-1 

Panda, S.S., Pattnaik, T. & Aich, P. Antibiotic Cocktail: An Excellent Tool to Probe Physiology by Perturbing Gut Microbiota: A Mice Model. Curr Microbiol 82, 457 (2025). https://doi.org/10.1007/s00284-025-04409-5 

Mukhopadhyay, S., Ulaganathan, N., Dumpuri, P., Aich, P. (2025). Integrative AI-Based Approaches to Connect the Multiome to Use Microbiome-Metabolome Interactive Outcome as Precision Medicine. In: Mandal, S. (eds) Artificial Intelligence (AI) in Cell and Genetic Engineering. Methods in Molecular Biology, vol 2952. Humana, New York, NY. https://doi.org/10.1007/978-1-0716-4690-8_2 

SYSTEM AND METHOD FOR DETERMINING MICROBIOME FROM HOST METABOLOME USING A MACHINE LEARNING MODEL.  Patent # 552962 (Indian), EP4471790 (European), Patentee: 1. MicrobioTx Health Private Limited 2. National Institute of Science Education and Research. Inventor: Palok Aich
 

Microbiome Test Kit. Licence No: MFG/IVD/2024/000087 (Class B) Issued On: 30-SEP-2024. Central Drugs Standard Control Organization (CDSCO), Directorate General of Health Services, Ministry of Health & Family Welfare, Government of India (A translation of basic research). Inventor: Palok Aich

Nayak, Akankshya, Swati S. Panda, Isha Dwivedi, Shivani Meena, and Palok Aich. "Role of Gut Microbial-derived Metabolites and Other Select Agents on Adipocyte Browning." Biochemical and Biophysical Research Communications 737, (2024): 150518. Accessed August 17, 2024. https://doi.org/10.1016/j.bbrc.2024.150518.

Importance of Microbial Diversity on Health: Perhaps the Best Tool to Intervene in Emerging and Continuing Diseases. Sohini Mukhopadhyay, Sunaina Sunaina, Tanuja Mohanty, Ankita Das, Arka Jyoti De, Isha Dwivedi, and Palok Aich. In Microbial Diversity in the Genomic Era: Functional Diversity and Community Analysis. SECOND EDITION (2024). Academic Press, Elsevier. Ed by Surajit Das and Hirak Ranjan Dash.

Panda, S. S., Behera, B., Ghosh, R., Bagh, B., & Aich, P. (2024). Antibiotic-induced adipose tissue browning in C57BL/6 mice: An association with the metabolic profile and the gut microbiota. Life Sciences, 340, 122473. https://doi.org/10.1016/j.lfs.2024.122473

Role of oxidative stress, gut microbiota, and derived metabolites in the etiology and progression of nonalcoholic fatty liver disease. Ankita Das, Arka Jyoti De, Tanuja Mohanty, and Palok Aich. Redox Experimental Medicine (2023), e230016. https://doi.org/10.1530/REM-23-0016

Uday Pandey, Subodh Tambat and Palok Aich. Postnatal 14D is the key window for mice intestinal development- An insight from age-dependent antibiotic-mediated gut microbial dysbiosis study. Advanced Biology 2023 (in press). DOI: 10.1002/adbi.202300089

Panda, S.S.; Nayak, A.; Shah, S.; Aich, P. A Systematic Review on the Association between Obesity and Mood Disorders and the Role of Gut Microbiota. Metabolites 2023,13,488. https://doi.org/ 10.3390/metabo13040488

Singh, Dhyanendra, Shalini Pandey, Arindam Ghosh, and Palok Aich. "Effects of Constant Darkness on Behaviour and Physiology of Male and Female Mice." European Journal of Neuroscience 57, no. 9 (2023): 1498-1515. Accessed April 28, 2024. https://doi.org/10.1111/ejn.15972.

Singh, Dhyanendra, Abhilash Preetam Ambati, and Palok Aich. "Sex and Time: Important Variables for Understanding the Impact of Constant Darkness on Behavior, Brain, and Physiology." Neuroscience 519, (2023): 73-89. Accessed April 28, 2024. https://doi.org/10.1016/j.neuroscience.2023.03.016..

Sohini Mukhopadhyay, Tanya Pattnaik, and Palok Aich. A deeper understanding of the gut microbiota of different human races in search of disease-specific microbial and metabolic biomarkers. Microenvironment & Microecology Research   |   2022, Vol. 4  |   Issue (4): No.18     https://doi.org/10.53388/MMR2022018

Mukhopadhyay, S., Ray, P. and Aich, P. A comparative analysis of gut microbial dysbiosis by select antibiotics and DSS to understand the effects of perturbation on the host immunity and metabolism. Life Sciences (2022), Volume 312, 1 January 2023, 121212  https://doi.org/10.1016/j.lfs.2022.121212

Chu, L.M., Karunanayake, C., Aich, Pet al. Association between liver enzymes and metabolic syndrome in Canadian adults: results from the Canadian health measures survey - cycles 3 &4. J Diabetes Metab Disord 21, 1699–1708 (2022). https://doi.org/10.1007/s40200-022-01124-x https://doi.org/10.1007/s40200-022-01124-x

Mukhopadhyay, S. and Aich, P. (2022). Cost-Effective Method for gDNA Isolation from the Cecal Content and High Yield Procedure for RNA Isolation from the Colonic Tissue of Mice. Bio-protocol 12(15): e4484. DOI: 10.21769/BioProtoc.4484.

Impact of sodium-glucose cotransporter-2 inhibitors on liver steatosis/fibrosis/inflammation and redox balance in non-alcoholic fatty liver disease Francesco Bellanti, Aurelio Lo Buglio, MichaÅ‚ Dobrakowski, Aleksandra Kasperczyk, SÅ‚awomir Kasperczyk, Palok Aich, Shivaram P Singh, Gaetano Serviddio, Gianluigi Vendemiale. World J Gastroenterol 2022 July 14; 28(26): 3243-3257. DOI: 10.3748/wjg.v28.i26.3243

Effects of starch-rich or fat-rich diets on metabolism, adiposity, and glycemia in immune-biased, C57BL/6 and BALB/c mice. Raktim Mukherjee, Shalini Pandey, Arindam Ghosh, and Palok Aich (2022). J Nutritional Biochemistry Volume 108,109086, ISSN 0955-2863, https://doi.org/10.1016/j.jnutbio.2022.109086.

Postnatal intestinal mucosa and gut microbial composition develop hand in hand: A mouse study. Uday Pandey and Palok Aich. (in press, Biomedical Journal 2022), https://doi.org/10.1016/j.bj.2022.03.004

Differential colitis susceptibility of Th1- and Th2-biased mice: A multi-omics approach. Sohini Mukhopadhyay, Subha Saha, Subhayan Chakraborty, Punit Prasad, Arindam Ghosh, Palok Aich. PLoS One. Published: March 9, 2022https://doi.org/10.1371/journal.pone.0264400 

Microbiota transplantation from younger to older mice could restore lost immunity to effectively clear salmonella infection in Th2-biased BALB/c mice, Salila Pradhan, Pratikshya Ray,  Palok AichLife Sciences 2021, 120201, ISSN 0024-3205. https://doi.org/10.1016/j.lfs.2021.120201. (https://www.sciencedirect.com/science/article/pii/S0024320521011887)

Predictive Biomarkers of Cardiovascular Disease in Adult Canadian Population. Punam Pahwa, Luan Chu, Chandima Karunanayake, Palok Aich, Markus Hecker, Anurag Saxena, Philip Griebel, Soumya Niyogi. Journal of Diabetes & Metabolic Disorders 2021, 20(2):1199-1209. DOI: 10.1007/s40200-021-00842-y

The starch-rich diet causes lipidemia while the fat-rich diet induces visceral adiposity, meta-inflammation, and Insulin resistance differentially in immune-biased mouse strains. Raktim Mukherjee & Palok AichFood Biosciences 2021, 42, August 2021, https://doi.org/10.1016/j.fbio.2021.101136 .

Effects of two potential probiotic Lactobacillus bacteria on adipogenesis in vitro. Dipanjan Guha, Raktim Mukherjee & Palok AichLife Sciences 2021, 278, https://doi.org/10.1016/j.lfs.2021.119538 .  [equal contribution: DG & RM].

Vancomycin induced changes in host immunity and behavior: Comparative genomic and metagenomic analysis in C57BL/6 and BALB/c mice. Pratikshya Ray, Uday Pandey, Debasmita Das, and Palok Aich. Digestive Diseases and Sciences 2021https://rdcu.be/ccWpM

Secretory clusterin promotes oral cancer cell survival via inhibiting apoptosis by activation of autophagy in Akt/mTOR/ULK1 dependent pathway. Prajna P. Naik, PhD; Debasna P. Panigrahi; Kewal K. Mahapatra; Srimanta Patra; Prakash P. Praharaj; Chandra S. Bhol; Sarbari Saha; Aditya K. Panda; Krupasindhu Panda; Subhankar Paul; Palok Aich; Samir K Patra, and Sujit K Bhutia. Life Sciences 2020https://doi.org/10.1016/j.lfs.2020.118722

Pratikshya Ray, Uday Pandey and Palok Aich. Comparative analysis of beneficial effects of Vancomycin treatment on Th1- and Th2-biased mice and the role of gut microbiota. J Applied Microbiology 2020,https://doi.org/10.1111/jam.14853

Dipanjan Guha, Raktim Mukherjee and Palok Aich. Macrophage plays important role in cortisol and serotonin-induced adipogenesis in vitro, In Vitro Cellular & Developmental Biology - Animal2020; doi:10.1007/s11626-020-00482-1 [equal contribution: DG & RM] [published online ahead of print, 2020 Aug 5]. 

Rinku Pramanick, Niranjan Mayadeo, Himangi Warke, Shahina Begum, Palok Aich, and Clara Aranha. Vaginal microbiota of asymptomatic bacterial vaginosis and vulvovaginal candidiasis: Are they different from normal microbiota? Microbial Pathogenesis 2019, 134, 103599.  https://www.ncbi.nlm.nih.gov/pubmed/31212037

Dipanjan Guha, Arka Banerjee, Raktim Mukherjee, Biswaranjan Pradhan, Maria Peneva, Georgi Aleksandrov, Sujit Suklabaidya, Shantibhushan Senapati and Palok Aich. A Probiotic formulation containing Lactobacillus bulgaricus DWT1 inhibits tumor growth by activating pro-inflammatory responses in macrophages. Journal of Functional Foods 2019, 56, 232-245. https://doi.org/10.1016/j.jff.2019.03.030

J. Tomporowski, J.M. Heer, B. Allan, S. Gomis, P. Aich, Carbon nanotubes significantly enhance the biological activity of CpG ODN in chickens, International Journal of Pharmaceutics 2019, 561, 135-147. https://doi.org/10.1016/j.ijpharm.2019.02.040 

Naik, A., Pandey, U., Mukherjee, R., Mukhopadhyay, S., Chakraborty, S., Ghosh, A., Aich, PLactobacillus rhamnosus GG reverses mortality in neonatal mice against Salmonella challenge. Toxicology Research (RSC) 2019, DOI: https://doi.org/10.1039/C9TX00006B

Priyadarshini, S., Pradhan, B., Griebel, P., and Aich, P. Cortisol regulates immune and metabolic processes in murine adipocytes and macrophages through HTR2c and HTR5a serotonin receptors. ​Eur. J Cell Biol. 2018, 97(7), 483-492, https://doi.org/10.1016/j.ejcb.2018.07.004

Priyadarshini, S., Pradhan, B., and Aich, P. Role of Murine macrophage in temporal regulation of cortisol and serotonin induced adipogenesis in pre-adipocytes when grown together. Biol Open 2018, http://bio.biologists.org/content/biolopen/7/8/bio034629.full.pdf?with-ds=yes

Pradhan, B., Guha, D., Naik, A. K., Banerjee, A., Tambat, S., Chawla, S., Senapati, S., and Aich, P. , Probiotics L. acidophilus and B. clausii Modulate Gut Microbiota in Th1- and Th2-Biased Mice to Ameliorate Salmonella Typhimurium-Induced Diarrhea. Probiotics Antimicrob Proteins, 2018. DOI:10.1007/s12602-018-9436-5;  https://link.springer.com/article/10.1007/s12602-018-9436-5 

Debakanta Mishra, Debakanta Mishra, Kaibalya R. Dash, Preetam Nath, Prasant K. Parida,  Subhendu Panigrahi, Chittaranjan Khatua, Suryakant Parida, Sambit K. Behera, Shivaram P. Singh, Palok Aich. Temporal Trends in the Etiology of Chronic Liver Disease in Coastal Eastern Odisha, Journal of Clinical and Experimental Hepatology, Volume 7, Supplement 2, 2017, Page S93DOI: http://dx.doi.org/10.1016/j.jceh.2017.05.168

Pradhan B, Guha D, Murmu KCSur A, Ray P, Das D, Aich P. Comparative efficacy analysis of anti-microbial peptides, LL-37 and indolicidin upon conjugation with CNT, in human monocytes. J Nanobiotechnology 15, 2017, 44 https://www.ncbi.nlm.nih.gov/pubmed/28606090 

Biswaranjan Pradhan, David A. Datzkiw and Palok Aich (2016). Gut 
microbiota and health: a review with focus on metabolic and immunological disorders and microbial remediation. Biomedical Reviews 27. 2016, 1-17. 
http://journals.mu-varna.bg/index.php/bmr/issue/view/171 

Front cover: Change in healthy microbial composition leads to dysbiosis (red arrows) and is associated with obesity, diabetes, colorectal cancer, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD) and Clostridium difficile infections (CDI). Prebiotics, probiotics and fecal microbial transplantation (FMT) remediate microbial symbiosis (green arrows) and return the microbial composition to a healthy state. From the Review of Pradhan et al, Biomedical Reviews 27. 2016, 1-17. 
 http://journals.mu-varna.bg/index.php/bmr/issue/view/171

Biswaranjan Pradhan, Dipanjan Guha, Pratikshya Ray, Debashmita Das, and Palok Aich. Comparative Analysis of the Effects of Two Probiotic Bacterial Strains on Metabolism and Innate Immunity in the RAW 264.7 Murine Macrophage Cell Line. Probiotics Antimicrob Proteins 2016: 1-12. 10.1007/s12602-016-9211-4 https://link.springer.com/article/10.1007/s12602-016-9211-4

Sushri Priyadarshini and Palok Aich. Understanding effects of Psychological Stress on physiology and disease through human stressome - An integral algorithm. Current Bioinformatics 2016, 11(2), 277- 290 https://www.ingentaconnect.com/content/ben/cbio/2016/00000011/00000002/art00017 

Shivaram Singh, Ayaskanta Singh, Debasis Misra, Bijay Misra, Girish Pati, Sanjib Kar, Manas Panigrahi, Pallavi Bhuyan, Kaumudi Pattnaik, Chudamani Meher, Omprakash Agrawal, Niranjan Rout, Palok Aich. Risk factors associated with the development of non-alcoholic fatty liver disease in Indians: A case-control study. Journal of Clinical and Experimental Hepatology 20155(4), 295-302 https://www.ncbi.nlm.nih.gov/pubmed/26900270 

Abhinav Sur, Biswaranjan Pradhan, Arka Banerjee & Palok Aich. (2015) Immune activation efficacy of indolicidin is enhanced upon conjugation with carbon nanotubes and gold nanoparticles. PLoS One 10 e0123905. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4398554/

P. Sood, S. Priyadarshini & P. Aich. Estimation of Psychological Stress in Humans: A Combination of Theory and Practice. PLoS ONE 2013, 8, e63044.). http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0063044

S. Priyadarshini and P. Aich. Effects of psychological stress on innate immunity and metabolism in humans: a systematic analysis. PLoS One 2012, 7: e43232 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3446986/

Paul D Hodgson, Palok Aich, Joseph Stookey, Yurij Popowych, Andrew Potter, Lorne Babiuk, and Philip J Griebel. Stress significantly increases mortality following a secondary bacterial respiratory infection. Veterinary Research 2012, 43, 21. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3348069/

P. Sood P, S. Priyadarshini, P. Aich. Psychological stressors as interventions: Good out of the evil. Front Biosci (Schol Ed) 20124: 43-60. https://www.ncbi.nlm.nih.gov/pubmed/22202042

B. Kumar, A. Manuja, P. Aich. Stress and its impact on farm animals.Front Biosci (Elite Ed) 20124: 1759-1767. https://www.bioscience.org/2012/v4e/af/496/fulltext.htm

A. Dwivedy and P. Aich. Importance of Innate Mucosal Immunity and promises it holds. International Journal of General Medicine 20114, pp:299-311 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3085239/

Alison Thompson, Elaine Van Moorlehem, and P. Aich. Probiotic-Induced Priming of Innate Immunity to Protect Against Rotaviral Infection. Probiotics and Antimicrobial Proteins 2010Volume 2, Issue 2, Page 90 https://link.springer.com/article/10.1007/s12602-009-9032-9

For complete publications, please click here

Palok Aich on ResearchGate (Click here)

Overview

Prof. Palok Aich works at the intersection of biophysics, immunology, and microbiome science, connecting fundamental discovery with practical applications in health and disease. Trained in biophysics and molecular biology (Ph.D., Saha Institute of Nuclear Physics), with senior research and leadership experience in Canada before joining NISER in 2009, he integrates multi-omics technologies, AI/ML analytics, organoid and animal models, and human studies to understand how the gut microbiome shapes host metabolism, inflammation, and neuro-immunological health.

Research Areas

The Aich Lab investigates the relationship between the gut microbiome, host metabolism, immunity, and brain health. Current programs:

Map the gut-adipose-liver-brain axis and its role in health and disease.

Identify microbial and host-derived metabolites that regulate systemic immunity and metabolic balance.

Study complex disorders including type 2 diabetes, obesity, NAFLD, IBD, and neurodegeneration, alongside psychological-stress physiology and innate mucosal immunity.

New: Healthy aging and longevity: evaluate a triple-stack therapy in organoid and mouse models to promote healthy aging and extend healthspan.

Apply AI/ML methods, regression, uni- and multivariate statistics, clustering, and network modeling, to map microbiome-metabolome relationships and enable predictive, personalized medicine.

Innovations & Impact

Gut Function Test (GFT): Invented the world's first non-invasive test that predicts gut microbiome composition from blood metabolites, removing the need for stool-based diagnostics. The GFT is patented, approved by CDSCO (India), and commercialized through the spin-off MicrobioTx Health, which also delivers personalized probiotics.

M-DNA: Discovered and patented a conductive form of DNA created by doping with transition-metal ions, advancing the concept of molecular wires in nanoelectronics.

Translational public health: Bridges basic science and application across personalized medicine and public health, attracting both academic and industry collaborations and fostering entrepreneurship among early-career researchers.

Selected Findings

Microbial metabolites drive metabolism. Specific gut-derived metabolites induce browning of adipose tissue ("beige fat") in mice, increasing lipid metabolism and the expression of beige-fat genes, effects comparable to or exceeding known browning agents, pointing to microbiome-targeted strategies against obesity and metabolic syndrome.

Diet and antibiotics reshape the microbiome. High-starch diets increased beneficial diversity (notably Verrucomicrobia) and improved adiposity and glycemic control, whereas fat-rich diets favored Proteobacteria, reduced Bacteroidetes, and worsened metabolic health. Shifts in the Firmicutes/Bacteroidetes ratio track with obesity and metabolic syndrome.

SCFAs and dysbiosis. Microbiome disruption lowers beneficial short-chain fatty acids, altering host metabolism and immunity and contributing to type 2 diabetes, NAFLD, and obesity.

Early-life window. A critical postnatal window (~day 14 in mice) links gut microbial shifts to intestinal barrier function and immune development, shaping later metabolic susceptibility.

Precision probiotics. Tailored formulations targeting dysbiosis produced significant weight loss and improved insulin sensitivity in metabolic-syndrome models, demonstrating real-world translational potential.

Career Background

Prof. Aich earned his Ph.D. in Biophysics from the Saha Institute of Nuclear Physics, studying antitumor antibiotic (mithramycin, chromomycin)–DNA interactions and the role of magnesium ions. Postdoctoral work at Stockholm University and the Karolinska Institutet addressed higher-order DNA structures using 2D NMR and circular dichroism, and contributed to developing Fluorescence Correlation Spectroscopy in the ultraviolet region for single-molecule DNA studies. At the University of Saskatchewan (Canada), he investigated higher-order DNA structures in oncogenes and co-discovered M-DNA, leading to the founding of the company ADNAVANCE. As a Scientist and Principal Investigator at VIDO (now VIDO-InterVac), he built programs in innate mucosal immunity, including how psychological stress affects host–pathogen interactions in bovine and chicken models and nanotechnology-based immune stimulators, and, as adjunct/associate faculty, taught systems biology, physiological genomics, and bioinformatics. He joined NISER in 2009.

Media Coverage

Work from the lab has been widely covered, including by BioVoiceNews, OnlyMyHealth, BioSpectrum, NuFFooDS Spectrum, DBT-ILS, Nextedge, ANI, and NEWSVOIR.

Current members

  • Ph.D.
    • Tanuja Mohanty (2022-) [To establish the etiology of NASH and its relation to gut microbiome in a mouse model]
    • ArkaJyoti De (2022-) [To establish the role of circadian rhythm and Wnt pathway in NAFLD in the mouse model]
    • Ankita Das (2022-) [To understand the etiology of Parkinson's Disease (PD) in a mouse model]
    • Snehanjali Puhan (Aug 2025-) [Differential spatio-temporal role of gut microbiome in healthy aging]
  • iMSc-PhD
    • Smaroki Smruti Rekha (Aug 2026-May 2027) [Healthy aging & longevity]
  • iMSc
    • Aug 2025-May 2027
      • Vani Vivek (Aging and neurodegeneration]
      • Sanat Behera (Aging and Disease]

Past members

  • Post-doctorate fellow
    • Dr. Anil K Baidya [2025-2026]
    • Dr. Sangeeta Mitra (2023-24)
    • Dr. Dipanjan Guha (2014-17)
  • Ph.D.
    • Dr. Sushri Priyadarshini (2010-2016)
    • Dr. Biswaranjan Pradhan (2011-2017)
    • Dr. Pratikshya Ray (2014-2021)
    • Dr. Raktim Mukherjee (2016-2022)
    • Dr. Sohini Mukhopadhyay (2016-2023)
    • Dr. Uday Pandey (2017-2024)
    • Dr. Dhyanendra Singh (2018-2024)
    • Dr. Swati Sagarika Panda (2019-2025)
  • iMSc
    • Dishari Pal, Kartika Sahoo and Rabmit Das [Aug 2024- May 2026]
    • Anshuman Chauhan, Arjoyeeta Das, and Bibek Upadhyay [Aug 2023-May 2025]
    • Akankshya Nayak, Srishti Shah and Sunaina B (Aug 2022- May 2024)
    • Debopriya Saha, Shivani Meena and Isha Dwivedi (Aug 2021-May 2023)
    • Tanya Patnaik and Biplab Behera (Aug 2020-May 2022)
    • Abhilas Ambati and Payal Priyadarsani (Aug 2019-May 2021)
    • Nilanjan Sahoo (MSc project student, Aug 2018-May 2020)
    • Aindrila Saha & Salila Pradhan (MSc project students, Aug 2017-May 2019)
    • Aman Naik (MSc project student, Aug 2016-May 2018)
    • Arka Banerjee (MSc project student, Aug 2015-May 2017)
    • Ruchisree Konhar and Krushna Chandra Murmu (MSc project students, Aug 2013-May 2015)
    • Abhinav Sur (MSc project student, Aug 2012-May 2014)
    • Parul Sood & Abhishek Dwivedy (Project Students: Jan 2010-April 2012)
  • Project Assistant
    • Rajlaxmi Dey [2024-2026]
  • Other Short-term project students:
    • In India
      • DIbysasa Padhi (CBES Mumbai), Vani Vivek, Sanat K Behera,  & Smaroki Smruti Rekha (NISER) [2025]
      • G Rakesh & Sukirtee (IIT-B), Sirsa Debnath (IISER-M), Soumya Sahoo, Smriti Mohanty, and Priyanshu Panda (BJB college, Bhubaneswar, Odisha, India) [2023]
      • Ashlesh Pattnaik, Ashapoorna Swain, Madhusmita Subudhi, Shreya Mukherjee, and Shubhodeep Bose (Summer Project Students, 2019)
      • B.S. Arpita and Pushpalata Sahoo, Siksha-O-Anusandhan University, Bhubaneswar, Odisha, India (2018-19)
      • Swati Sudipta Behera & Insha Sadaf, MITS School of Biotechnology, Bhubaneswar, Odisha, India (2018)
      • Livanjali Pradhan, Umalisa Ojha, Ananya Naik, Ankita Pati (Short term project Students from Orissa University of Agriculture and Technology-OUAT, 2017)
      • Ananya Sen (Short term project student, 2016)
      • David Datzkiw (Short term Queen Elizabeth Commonwealth Fellow, Canada)
      • Soumya Mishra (Summer project student, 2015)
      • Manaswini Kar, Aman Naik, and David Datzkiw (Summer project students, 2014)
      • Aniket Bhattacharya (Summer Project Student, June-July 2012)
      • Sudhansu Gautam (Summer Project Student, June-July 2012)
      • Sarmistha Nanda (JRF, DST, since March 2012)
      • Bhakti Patel (Laboratory Technician: Aug 2010-Sep 2011
      • Manoj Kumar (Laboratory Technician: Sep 2011-2012)
      • Urvashi Jha (Summer project student: May-July 2011)
      • Ishani Das & Saptaparna Sikdar (Project Students: Jan-June 2011)
    • In Canada
      • Alison Thompson (Honors student: Sep 2008-April 2009)
      • Alison Thomson (Summer project student: May-August, 2008)
      • Nirosha Hoover and Chinh Ly (4th year Honors student, 2007-2008)
      • Michelle Scott (4th year Honors student, 2007-2008)
      • Jason Tamporowski (Graduate Student, 2007-2009)
      • Jamille Heer (Technician, 2007-2009)
      • Katie Herzog (Graduate student, 2003-2007)
      • Shakiba Jalal (Summer student/Bioinformatician, 2002-2005)
      • Ashley Begg (Co-op Student, 2002)
      • Heather Wilson (Post-doctorate fellow, 2002-2005)
      • RadheyShyam Kaushik (Research Associate, 2002-2004, Co-supervised)
      • Carly Czuba (Honors student, 2005-06)
      • Siew Hong Ng (Honors student, 2006)
      • Burke Barlow (Honors student, 2006)

At NISER:

Systems Biology (BE1), Biophysics & Biostatistics (B203),

Science of Life (I & II) (B101 & 102)

Quantitative & Systems Biology (B407 (now), earlier B558/B758, the course was planned and designed by me) and laboratory courses

Chemical Biology (B457/B657, the course was planned and designed by me)

At UofS

Basic Techniques in Life Science

Bioinformatics

Physiological Genomics

Systems Biology

At Karolinska Institutet

Fluorescence Correlation Spectroscopy (FCS)

Currently, the Dean (Research & Development), NISER

Director, a) NISER Homi Bhabha Foundation and b) MicrobioTx Health.

Besides my regular academic (teaching and research) activities, I executed various administrative responsibilities as follows

  1. 1st Chairperson of the School of Biological Sciences, NISER
  2. 1st Chair of the UGCI, NISER
  3. 1st Dean/Faculty-in-charge of
  • International Affairs and Resource Planning
  • Institute Works Dept

  4. Second Chairman

  • The Central Library, NISER