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A S Sreedhar

A S Sreedhar

A S Sreedhar

Scientist-G
Stress Biology and Molecular Medicine
+91-040-27192698
assr[at]ccmb[dot]res[dot]in

Research Interests

Heat Shock Proteins in Biology and Medicine: Our group is working on stress response and heat shock proteins (Hsps) in biology and medicine. We are studying the molecular basis of stress response and transcriptional regulation of Hsp synthesis during development, differentiation and stress management to identify the unconventional roles of heat shock transcription factors in tumor cells. High expression of Hsps, especially the Hsp90 in tumor cells correlates with poor prognosis and accelerated disease progression. Therefore we are studying effect of Hsp90 inhibition in anticancer treatments and elucidating novel functions of Hsps. Inducing cytostasis or apoptosis in tumor cells may induce unwanted cellular response. We are evaluating stress (physiological or oncogene), or Hsp inhibition or over expression induced cellular senescence as a tumor suppressor mechanism. Our group is also involved in molecular targeting of cancer using natural compounds, and evaluation of combinatorial treatments as beneficial tool for cancer.
Selected Publications

Shrikant PD, Paithankar K, Abhijnya KV, Hatim SK, Sreedhar AS
Mitochondrial chaperone, TRAP1 modulates mitochondrial dynamics and promotes tumor metastasis
Mitochondrion. doi: https://doi.org/10.1016/j.mito.2020.08.001

Vijayalakshmi A, Khanderao P, Shrikanth PD, Abirami A, Sreedhar AS.
Development of Nanocarrier-Based Mitochondrial Chaperone, TRAP-1 Inhibitor to Combat Cancer Metabolism.
ACS Appl. Bio Mater. 2020, 3, 7, 4188–4197. https://doi.org/10.1021/acsabm.0c00268

Ramkumar B, Dharaskar SP, Mounika G, Paithankar K, Sreedhar AS.
Mitochondrial chaperone, TRAP1 as a potential pharmacological target to combat cancer metabolism.
Mitochondrion. 2020;50:42-50. doi:10.1016/j.mito.2019.09.011

Kumar P, Devaki B, Jonnala UK, Sreedhar AS.
Hsp90 facilitates acquired drug resistance of tumor cells through cholesterol modulation however independent of tumor progression.
Biochim Biophys Acta Mol Cell Res. 2020;1867(8):118728. doi:10.1016/j.bbamcr.2020.118728

Kanugovi AV, Joseph C, Siripini S, Paithankar K, Sreedhar AS.
Compromising the constitutive p16INK4a expression sensitizes human neuroblastoma cells to Hsp90 inhibition and promotes premature senescence.
J Cell Biochem. 2020;121(4):2770-2781. doi:10.1002/jcb.29493

Education & Experience

P.G.:

Biochemistry ; SV University ; 1991-92

Ph.D:

Hsp90 inhibitors: their effects on redox status and on the cytosrchitecture ; Semmelweis University, Hungary ; 2004

Post-doctoral Research:

Stress Biology ; Kyoto University, Japan ; 2007 ; ;

JSPs Fellow, Stress Biology ; Kyoto University, Japan ; 2007 ; ;

Experience:

27 years; Stress Biology, Cell and Developmental Biology, Molecular Biology, Molecular Medicine.

Team Members

team-members-pic
A S Sreedhar
A S Sreedhar

Scientist-G

Scientist-G

Priyadarshini Singh
Priyadarshini Singh

Senior Research Fellow

Senior Research Fellow

Prateekshya Das
Prateekshya Das

Junior Research Fellow (DBT)

Junior Research Fellow (DBT)

Vivek Chaudhary
Vivek Chaudhary

Junior Research Fellow

Junior Research Fellow

Nitesh Kumar Gupta
Nitesh Kumar Gupta

Junior Research Fellow

Junior Research Fellow

Shubham Tarenia
Shubham Tarenia

Junior Research Fellow

Junior Research Fellow

Anit Antony
Anit Antony

Project Research Scientist-I

Project Research Scientist-I

Kainat Fatima
Kainat Fatima

Project Research Scientist-I

Project Research Scientist-I

Publications

Title

Journal

Year

Analysis and functional relevance of the chaperone TRAP-1 interactome in the metabolic regulation and mitochondrial integrity of cancer cells
Scientific Reports
2023
The mitochondrial chaperone TRAP-1 regulates the glutamine metabolism in tumor cells
Mitochondrion
2023
Heat shock transcription factor HSF2 modulates the autophagy response through the BTG2-SOD2 axis
Biochemical and Biophysical Research Communications (BBRC)
2022
Hsp90 and its mitochondrial homologue TRAP-1 independently regulate hypoxia adaptations in Caenorhabditis elegans
Mitochondrion
2021
Hsp90 and its mitochondrial homologue TRAP-1 independently regulate hypoxia adaptations in Caenorhabditis elegans ?
Mitochondrion(Accepted)
2021
Cancer vs. SARS-CoV-2 induced inflammation, overlapping functions, and pharmacological targeting
Inflammaopharmacology (Accepted)
2021
Hsp90 chaperone facilitates E2F1/2-dependent gene transcription in human breast cancer cells ?
European Journal of Cell Biology https://doi.org/10.1016/j.ejcb.2020.151148
2021
The conformation-specific Hsp90 inhibition interferes with the oncogenic RAF kinase adaptation and triggers premature cellular senescence, hence, acts as a tumor suppressor mechanism.
BBA- Molecular Cell Research https://doi.org/10.1016/j.bbamcr.2020.118943
2021
Mitochondrial chaperone, TRAP1 modulates mitochondrial dynamics and promotes tumor metastasis
Mitochondrion, doi: https://doi.org/10.1016/j.mito.2020.08.001
2020
Hsp90 facilitates acquired drug resistance of tumor cells through cholesterol modulation however independent of tumor progression
Biochimica et Biophysica Acta (BBA) - Molecular Cell Research, https://doi.org/10.1016/j.bbamcr.2020.118728
2020
Altered molecular pathways decides the treatment outcome of Hsp90 inhibitors against breast cancer cells
Toxicology in Vitro, 2020 https://doi.org/10.1016/j.tiv.2020.104828
2020
The matrix metalloproteinase 7 (MMP7) links Hsp90 chaperone with acquired drug resistance and tumor metastasis
Cancer Reports : doi:10.1002/cnr2.1261
2020
Development of nanocarrier-based mitochondrial chaperone, TRAP-1 inhibitor to combat cancer metabolism.
ACS Appl. Bio Mater. (doi: https://dx.doi.org/10.1021/acsabm.0c00268.)
2020
Hsp90 regulates HDAC3-dependent gene transcription while HDAC3 regulates the functions of Hsp90
Cellular Signalling (doi: https://doi.org/10.1016/j.cellsig.2020.109801)
2020
Mitochondrial chaperone, TRAP1 modulates mitochondrial dynamics and promotes tumor metastasis
Mitochondrion, doi: https://doi.org/10.1016/j.mito.2020.08.001
2020
Mitochondrial chaperone, TRAP1 as a potential pharmacological target to combat cancer metabolism
Mitochondrion. 2019 Oct 25. pii: S1567-7249(19)30019-4. doi: 10.1016/j.mito.2019.09.011.
2019
Compromising the constitutive p16(INK4a) expression sensitizes human neuroblastoma cells to Hsp90 inhibition and promotes premature senescence.
J Cell Biochem. 2019 Nov 6. doi:10.1002/jcb.29493.
2019
The tumor suppressor p16INK4a expression bypasses 17AAG mediated cellular effects in human neuroblastoma, IMR-32
Transl Med, Vol 6, p 74. 2016,doi: 10.4172/2161-1025.c.1.020
2016
The prosurvival activity of HSF2 in response to autophagic stress is triggered by HSF2 - dependent transactivation of BTG2
Mol Biol Cell, 26(25): 4523,doi: 10.1091/mbc.E15-09-0674
2015
Molecular characterization and expression analysis of hsp60 gene homologue of sheep blowfly, Lucilia cuprina
J Therm Biol, Vol 52, p 24-37.,doi: 10.1016/j.jtherbio.2015.05.001.
2015
Oncogene de-addiction from Hsp90 induces senescence-like phenotype in malignant and metastatic tumor cells
Mol Biol Cell, vol. 25, p 25 3987,doi:10.1091/mbc.E14-10-1437
2014
Synthesis, anticancer and antibacterial activities of piplartine derivatives on cell cycle regulation and growth inhibition
Journal of Asian Natural Products Research. 15:658-669, 2013.
2013
Cipadessin-type limonoids from the leaves of Cipadessa baccifera
Tetrahedron Letters, 54: 2934-2937, 2013.
2013
Geldanamycin combination with colcemid induces mitotic arrest through stabilization of bubR1 mitotic kinase in human tumor cells
Journal of Cancer Therapy, 4: 709-719, 2013
2013
Hsp60 chaperonin acts as barrier to pharmacologically induced oxidative stress mediated apoptosis in tumor cells with differential stress response
Drug Target Insights, Vol 7, p 35-51 doi: 10.4137/DTI.S12513
2013
Heat shock proteins in the cancer immunity: comprehensive review on potential chemotherapeutic interventions
J. Clin. Cell. Immunol. 6: 1-8, 2012.
2012
Association of Glutamate Carboxypeptidase II (GCPII) Haplotypes with Breast and Prostate Cancer Risk
Gene, 516: 76-81, 2012.
2012
Glutamete carboxypeptidase II (GCPII) genetic variants as determinants of hyperhomocysteinemia: Implications in stroke susceptibility
Indian J Biochem & Biophys, 49:356-362, 2012.
2012
17AAG treatment accelerates doxorubicin induced cellular senescence: Hsp90 interferes with enforced senescence of tumor cells
Drug Target Insights,6:19-39
2012
Repercussion of mitochondria structural deformity induced by anti-Hsp90 drug 17AAG in human tumor cells
Journal of Drug Target Insights, 5: 1-22,2011
2011
Anti-microbial principles of selected remedial plants from southern India
Asian Pacific J Tropical Biomedicine,1: 298-305, 2011
2011
Pharmacological inhibition of Hsp90 as a novel antitumor strategy to target cytoarchitecture through extracellular matrix signaling.
Medicinal Chemistry,7:1-12, 2011
2011
Synthesis and anticancer effects of pongamol derivatives on mitogen signaling and cell cycle kinases
Medicinal Chemistry Reserach, Published online on 30-Jan-2011
2011
p53 pseudogene: potential role in heat shock induced apoptosis in a rat histiocytoma
HEALTH, Vol.2, 1065-1071.
2010
Stress proteins in biology and medicine: evolution, adaptation and clinical evaluation.
Int. J. Pharma & Biosci. Vol. 1(3): 1-35, 2010.
2010
Hsp70 confines tumor progression of rat histiocytoma and impedes the cytotoxicity induced by natural killer cells and peritoneal macrophages
Asia Pacific J. Trop. Med., Vol. 3 (4): 302-309.
2010
Hsp90 inhibition induces destabilization of actin cytoskeleton in tumor cells: functional significance of Hsp90 interaction with F-actin.
Asian Pacfic Journal of Tropical Medicine, Vol. 3, 715-722
2010
Combinatorial effect of 17AAG and doxorubicin on stress induced cellular senescence of human neuroblastoma cells
J. Ind. Acad. Geriatrics. 6: 133, 2010.
2010
17-(Allylamino)-17-demethoxygeldanamycin combination with diferuloylmethane selectively targets mitogen kinase pathway in a human neuroblastoma cell line
Journal of Cancer Therapy, Vol. 1,197-204.
2010
Diferuloylmethane augments the cytotoxic effects of piplartine isolated from Piper chaba.
Toxicology in Vitro. Vol.23: 1085-1091
2009
Hsp90 inhibitors, GA and 17AAG, leads to ER-stress induced apoptosis in rat histiocytoma.
Biochem. Pharmacol. 78: 141-152
2009
Stress response and emerging roles of heat shock proteins: Bench to Bedside.
Icfai J. Bitechnol 2: 31-50
2008
Heat shock transcription factors in the regulation of stress induced cell death pathways in a rat histiocytoma
J. Biosci., 32: 585-593
2007
Stress response: a molecular biology approach
ISBN: 81-308-0109-4, Research Signpost.
2006
Heat shock transcription factors: a comprohensive review. In stress response: a molecular biology approach (Eds. A. S. Sreedhar and Usha K. Srinivas)
ISBN: 81-308-0109-4, Research Signpost.
2006
Hyperthermia and pharmacological interventions of heat shock proteins in anticancer treatments
Japanese Journal of Hyperthermic Oncology, 22(4): 201-227
2006
Heat shock proteins in the clinical and pharmacological perspective. In stress response: a molecular biology approach (Eds. A. S. Sreedhar and Usha K. Srinivas)
ISBN: 81-308-0109-4, Research Signpost.
2006
Effect of unfolded protein accumulation on the redox state of the endoplasmic reticulum. In: Redox regulation (eds: A. Pompella, G. Banhegyi and M. Wellman-Rousseau),
NATO Science Series, 363: 111-119
2005
Effect of Hsp90 inhibitors, geldanamycin, 17-allylamino-17-demethoxygeldanamycin and curcumin on human neuroblastoma cells, IMR-32.
FEBS J., 272(s1): G1-008P
2005
Hidden dimensions of stress response
Everyman`s Science, XL: 179-185
2005
Heat Shock Proteins in the regulation of apoptosis: New strategies in tumor therapy
Pharmacol. & Ther., 101: 227-257
2004
Effect of potassium application on growth attributes and stem histology of chickpea grown in vertisol
Nat. J. Life Sci., 1: 187-191
2004
Hsp90 isoforms: functions, expression and clinical importance
FEBS Letts., 562: 11-15
2004
Enhancement of complement-induced cell lysis. A novel mechanism for the anticancer effects of Hsp90 inhibitors
Immunol. Lett., 92: 157-161
2004
Inhibition of Hsp90: a new strategy for inhibiting protein kinases
Biochim. Biophys. Acta (Proteins and Proteomics)., 1697: 233-242
2004
Apoptosis, necrosis and cellular senescence: chaperone occupancy as a potential switch
Aging Cell, 2: 39-45
2003
Novel Roles of Hsp90 inhibitors and Hsp90 in: redox regulation and cytoarchitecture
Rec. Res. Develop. Life Sci., 1: 153-171
2003
Hsp90 inhibition accelerates cell lysis: anti-Hsp90 ribozyme reveals a complex mechanism of Hsp90 inhibitors involving both superoxide- and Hsp90-dependent events
J. Biol. Chem., 278: 35231-35240
2003
Interaction of neuropeptide Y and Hsp90 through a novel peptide-binding region
Biochemistry (US), 42: 12972-12980
2003
Molecular chaperones, evolution and in medicine
J. Mol. Struct. (THEOCHEM), 666-667: 373-380
2003
A cross talk between cell signalling and cellular redox state during heat induced apoptosis in a rat histiocytoma
Free Radic. Biol. Med., 32: 221-227
2002
Effect of C-terminal deletion of p53 on heat induced CD95 expression and apoptosis in a rat histiocytoma
Oncogene, 21: 4042-4049
2002
Activation of stress response by ionomycin in rat hepatoma cells.
J. Cell. Biochem., 86: 154-161
2002
Emerging role for Hsp90 in protein folding, evolution, cell organization, and aging
Eur. J. Biochem., 269: 3.3-5
2002
Role of stress response proteins in the regulation of cell death process
Cell Stress and Chaperones , 5: 338-338
2001
Heat induced expression of CD95 and its correlation with the activation of apoptosis upon heat shock in rat histiocytic tumor cells
FEBS Letts., 472: 271-275
2000

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