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To serve patients, health care providers, research scientists, scholars, and society by providing excellence and innovation in diagnostic services and educational resources in a respectful, professional and culturally diverse atmosphere.

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To become a preeminent leader in academic anatomic and clinical pathology while translating basic science discovery to improved clinical care.

Senthil Kumar Pazhanisamy, Ph.D.

Senthil Kumar Pazhanisamy, Ph.D.

Mentor: Mentor: Daohong Zhou, M.D.
Office: Walton Research Building
Laboratory: STB434
Phone: (843) 792-4874
Fax: (843) 792-0368

Visit the Stem Cell Injury Lab


B.Pharma: Dr. MGR Medical University, India (1994-1999) Pharmacy and Medicine
M.Tech (Biotech): Jadavpur University India (2000-2002) Biotechnology
DAAD Fellowship: Leibniz Institute for Age Research, Germany (2004-2007) Proteome
Ph.D.: Heidelberg University, Germany (2004-2007) Cancer Genome
PostDoctoral Fellowship, MUSC (2007-present) Cancer Genetics


Adult stem cells are extremely important for the robust generation of major specialized progenitor cell types and thereby remarkably maintaining the tissue homeostasis throughout the adult life. Whereas, ionizing radiation (IR) exposure to hematopoietic system could intrinsically damage the stem cell functional capacity, leading to defect in reconstitution and proliferative potential, diminished self-renewal, elevated apoptosis and, eventually, functional exhaustion of the stem cell population. It has been suggested that accumulated DNA damage could be a principal mechanism underlying stem cell decline. In adult hematopoietic stem cells (HSCs), radiation induced elevated levels of DNA damage and/or oxidative stress may have profound impact on the functional capacity of the stem cell population. Although several reports characterized the DNA damage patterns in HSCs, it remains unclear how hematopoietic stem and progenitor cells (HPCs) respond towards radiation induced DNA damage. In order to achieve this goal, we are extensively investigating the underlying DNA damage patterns that trigger genetic instability in HSC and HPCs. Our main objective is to investigate how radiation stress could potentially alter the proliferative, self-renewal, cell cycle characteristics of hematopoietic stem cells. Using a mouse hematopoietic system, we are studying the DNA damage induction and repair patterns in stem and progenitor cells after the radiation insult in vivo and in vitro. Our aim is to establish that radiation induced stem cell injury could be at least, in part, rescued by mitigating the elevated levels of DNA damage and or oxidative stress in HSCs. More importantly, our study will establish that DNA damage and or oxidative stress accrual may contribute to transformation of stem cells into cancer stem cells with increased genetic instability. Unraveling the potential mechanisms of severe DNA damage and or oxidative stress could directly explains stem cell behavior under stress and possibly provide key insights for the development of a novel mechanism-based therapeutic strategy to mitigate radiation-induced stem cell injury.


  1. Pazhanisamy S, An N, Wang Y, Zhou D. Stimulation of cell cycling enhances DNA damage repair function in hematopoietic stem cells (manuscript in preparation)
  2. Yong Wang, Lingbo Liu, Senthil K. Pazhanisamy, Aimin Meng, and Daohong Zhou, Total body irradiation selectively induces persistent oxidative stress in murine hematopoietic stem cells, Cancer Research (manuscript in preparation)
  3. Pazhanisamy S, and Jyothi V. Genome architecture, instabilities, stem cells and cancer. J Stem Cell & Regen Med. 5(1), 2009. (Review Article)
  4. Kreth G, Pazhanisamy SK, Hausmann M Cremer C. Cell type specific quantitative predictions of radiation-induced chromosome aberrations: a computer model approach. Radiat Res. (2007); 167:515–525.
  5. Pazhanisamy SK, Kreth G, von Hase J, Stein S, Schwarz-Finsterle J, and Cremer C. The impact of the spatial proximity of tumor prone genes and cancer induction probabilities. (in preparation)
  6. Pazhanisamy SK and Jyothi V. Genome architecture, instabilities and cancer. (communicated).
  7. Mukherjee S, Saha A, Pazhanisamy SK, Chandak GR, PP, Ray K. Remarkable variation in the informativeness of RFLP markers linked to hemophilia B locus in Indian population groups: Implication in the strategy for carrier detection. Disease Markers. (2007); 22:1-8.
  8. Pazhanisamy SK, Kreth G, Cremer C. Biophysical modeling of chromosomal aberration based instabilities. Eur Biophys J. (2005); 34(6):638.
  9. Pazhanisamy SK. Stem Cell Research: The current progress and prospective applications. Drug Lines. (2002); 4:1-4
  10. Soudhamini E, Pazhanisamy SK, Divakar MC. Herbal remedies of Modugga tribes of siruvani, south India. I J Ind Med. (2002); 17(2): 41-49.
  11. Divakar MC, Pazhanisamy SK, Lakshmi Devi S, and Rao SB. Study on wound healing properties of Polyscias scutellaia leaf saponins. I J Nat Prod. (2001); 17(2):37-42.


  1. Pazhanisamy SK. How did life originate? SCITECH-The Statesman, Calcutta. (2001); 4, Oct 1.
  2. Pazhanisamy SK. Brave the New World of High-Tech magic. SCITECH-The Statesman, Calcutta. (2001); 2, Oct 15.
  3. Pazhanisamy SK. The Stem Cell Saga. SCITECH-The Statesman, Calcutta. (2002); 6, June17.


  1. Pazhanisamy S.K., Cremer C., Kreth G., Simulation of cancer induction probabilities of specific lymphomas, EU FP6 RISCRAD ANNUAL MEETING, 4-7 May 2006, Leiden, Nederlands.
  2. Pazhanisamy S.K., Kreth G., Huebschmann D., Cremer C., Biophysical modeling of chromosomal aberration based genome instability, EU RISC-RAD Annual Symposium, 27 April 2005, Bad Honnef, Germany.
  3. Pazhanisamy S.K., Modeling of virtual irradiation of the interphase genome and mechanistic evaluation of chromosomal aberrations, Chromosome Biology Annual Meishbach Meeting, 10-12 March 2005, Meishbach, Germany.
  4. Pazhanisamy S.K., Kreth G., Huebschmann D., Cremer C., Chromosomal aberration and genome instability, EU RISCRAD Scientific exchange program, 1 April 2005, GSF, Munich, Germany.
  5. Pazhanisamy S.K., ‘Identification of subcomplexes from different protein complexes of yeast’ at Jena Centre For Bioinformatics symposium, 05 December 2003, Jena, Germany.
  6. Pazhanisamy S.K., Kreth G., Cremer C.,The spatial distribution of ABL and BCR genes and CML induction probabilities, International Summer School On Molecular Imaging, 4-8 September 2006, EMBL Heidelberg, Germany.
  7. Pazhanisamy S.K., Cremer C., Kreth G., Biophysical modeling of chromosomal aberration based instabilities, International Biophysics Conference, 27 August -1 September 2005, Mopellier, France.
  8. Kreth G., Pazhanisamy S.K., Cremer C., The impact of spatial proximity of tumor-prone genes in cancer induction probabilities, IV Heinrich FC Behr Symposium (STEM CELL & CANCER) 2-14 March 2006. DKFZ German Cancer Research Centre,Heidelberg, Germany.
  9. Pazhanisamy SK, Kreth G, Cremer C., Towards a better quantitative evaluation of chromosomal aberrations: an implication of 3D architecture of interphase genome, 5TH International Conference on Systems Biology, 9-13 October 2005, Heidelberg, Germany.
  10. Pazhanisamy S.K., Kreth G., Cremer C. The modeling of radiation induced chromosomal exchange aberrations DNA REPAIR Workshop, September 28- October 1, 20+04, Ulm, Germany.
  11. Saibal Mukharjee, Pazhanisamy SK, Arijit Mukhopadhyay, Partha P. Majumadar, Ray. K., “Determination of Heterozygosity of WHO Recommended RFLP Markers Linked to Factor IX Gene in Indian Population”, Symposium of Society of Biological Chemists, 2002, Santiniketan, Kolkata, India.
  12. Pazhanisamy S.K. “Ribozyme: The Important Tool in Viral Therapy for Viral Infections including HIV, ‘BIOHORIZON’ BETA, 1-2 March 2002, IIT-Indian Institute Of Technology, Delhi, India.
  13. Pazhanisamy S.K., Nagarajan. P, Sudhishkumar, G., Madhu C. Divakar, Designing Of Hairpin Derived-Twin Ribozyme-The New Approach In Nucleic Acid Chemistry, National Symposium on Functional Genomics, 15-17 February, 2002, Madurai Kamarajar University, India. (Poster)
  14. Pazhanisamy SK, Fascinating Ribozyme - The Hidden facts in nucleic acid Chemistry, Verve - BIOTECHCELLENCE, 2001, Anna University, Chennai, India.


  1. Referee and peer-review committee member, Hygeia – Journal for Drugs and Medicines (2009-present)
  2. European Union RISC-RAD short term exchange fellowship (2005)
  3. Secretary, Heidelberg Research Students Association, Germany (2004-2005)
  4. "DAAD-Leibniz” scholarship from German Academic Exchange Service for the academic excellence (2003-2004)
  5. Freelance writer, Scitech column, The Statesman Daily, India (2002)
  6. Graduate Fellowship for Biotechology, Jadavpur University, India (2000-2002)


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