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Viswanathan Palanisamy, PhD
Associate Professor of Oral Health Sciences
College of Dental Medicine
MUSC

Email: visu@musc.edu
 
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Viswanathan Palanisamy, PhD

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Research Interest:

I am interested in basic and translational research programs to study posttranscriptional gene regulation during oral cancer development and progression. The major focus of the research is analyzing the contribution of an unusual form of post-transcriptional gene expression to mRNA metabolism, as well as the adaptation of mRNA stability and their associated proteins to this process. My laboratory's hypothesis is based on the discoveries made over the past three years. The focus is on cellular and molecular mechanisms of RNA binding proteins and mRNA biomarkers in oral cancer, and translating these findings into clinical applications, including development of biological markers for the diagnosis of oral cancer and potential therapies designed to favorably modify the progression of the disease.

Selected Publications:

1.Talwar S, House R, Sundaramurthy S, Balasubramanian S, Yu H, Palanisamy V. Inhibition of Caspases Protects Mice from Radiation-induced Oral Mucositis and Abolishes the Cleavage of RNA-binding Protein HuR. J Biol Chem. .289(6):3487-500, 2013. PMCID: PMC3916550
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2.Talwar S, Balasubramanian S, Sundaramurthy S, House R, Wilusz CJ, Kuppuswamy D, D'Silva N, Gillespie MB, Hill EG, Palanisamy V. Overexpression of RNA-binding protein CELF1 prevents apoptosis and destabilizes pro-apoptotic mRNAs in oral cancer cells. RNA Biol. .10(2):277-86, 2013. PMCID: PMC3594286
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3.Palanisamy V, Jakymiw A, Van Tubergen EA, D'Silva NJ, Kirkwood KL. Control of cytokine mRNA expression by RNA-binding proteins and microRNAs. J Dent Res. .91(7):651-8, 2012. PMCID: PMC3383846
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4.Sharma S, Gillespie BM, Palanisamy V, Gimzewski JK. Quantitative nanostructural and single-molecule force spectroscopy biomolecular analysis of human-saliva-derived exosomes. Langmuir. .27(23):14394-400, 2011. PMCID: PMC3235036
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5.Ramachandran S, Palanisamy V. Horizontal transfer of RNAs: exosomes as mediators of intercellular communication. Wiley Interdiscip Rev RNA. .3(2):286-93, 2011. PMCID: PMC3263325
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6.Talwar S, Jin J, Carroll B, Liu A, Gillespie MB, Palanisamy V. Caspase-mediated cleavage of RNA-binding protein HuR regulates c-Myc protein expression after hypoxic stress. J Biol Chem. .286(37):32333-43, 2011. PMCID: PMC3173192
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7.Yu H, Sun Y, Haycraft C, Palanisamy V, Kirkwood KL. MKP-1 regulates cytokine mRNA stability through selectively modulation subcellular translocation of AUF1. Cytokine. .56(2):245-55, 2011. PMCID: PMC3185122
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8.Sharma S, Rasool HI, Palanisamy V, Mathisen C, Schmidt M, Wong DT, Gimzewski JK. Structural-mechanical characterization of nanoparticle exosomes in human saliva, using correlative AFM, FESEM, and force spectroscopy. ACS Nano. .4(4):1921-6, 2010. PMCID: PMC2866049
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9.Palanisamy V, Sharma S, Deshpande A, Zhou H, Gimzewski J, Wong DT. Nanostructural and transcriptomic analyses of human saliva derived exosomes. PLoS One. .5(1):e8577, 2010. PMCID: PMC2797607
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10.Palanisamy V, Wong DT. Transcriptomic analyses of saliva. Methods Mol Biol. .666:43-51, 2010. PMCID: PMC3171800
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11.Palanisamy V, Park NJ, Wang J, Wong DT. AUF1 and HuR proteins stabilize interleukin-8 mRNA in human saliva. J Dent Res. .87(8):772-6, 2008. PMCID: PMC2572714
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12.Park NJ, Zhou X, Yu T, Brinkman BM, Zimmermann BG, Palanisamy V, Wong DT. Characterization of salivary RNA by cDNA library analysis. Arch Oral Biol. .52(1):30-5, 2006. PMCID: PMC2743855
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13.Palaniswamy V, Moraes KC, Wilusz CJ, Wilusz J. Nucleophosmin is selectively deposited on mRNA during polyadenylation. Nat Struct Mol Biol. .13(5):429-35, 2006. PMCID: PMC2811576
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14.Viswanathan P, Ohn T, Chiang YC, Chen J, Denis CL. Mouse CAF1 can function as a processive deadenylase/3'-5'-exonuclease in vitro but in yeast the deadenylase function of CAF1 is not required for mRNA poly(A) removal. J Biol Chem. .279(23):23988-95, 2004.
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15.Clark LB, Viswanathan P, Quigley G, Chiang YC, McMahon JS, Yao G, Chen J, Nelsbach A, Denis CL. Systematic mutagenesis of the leucine-rich repeat (LRR) domain of CCR4 reveals specific sites for binding to CAF1 and a separate critical role for the LRR in CCR4 deadenylase activity. J Biol Chem. .279(14):13616-23, 2004.
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16.Liu HY, Chiang YC, Pan J, Chen J, Salvadore C, Audino DC, Badarinarayana V, Palaniswamy V, Anderson B, Denis CL. Characterization of CAF4 and CAF16 reveals a functional connection between the CCR4-NOT complex and a subset of SRB proteins of the RNA polymerase II holoenzyme. J Biol Chem. .276(10):7541-8, 2000.
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17.Viswanathan P, Sriram V, Yogeeswaran G. Sensitive spectrophotometric assay for 3-hydroxy-substituted flavonoids, based on their binding with molybdenum, antimony, or bismuth. J Agric Food Chem. .48(7):2802-6, 2000.
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