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Malgorzata Kloc, PhD

Research Professor of Surgery, Institute for Academic Medicine
Associate Research Member, Research Institute
Houston Methodist
Weill Cornell Medical College


Prior to completing her postdoctoral training in Canada, Dr. Kloc-Stepkowska was a tenured Associate Professor in the Department of Zoology at the University of Warsaw, Poland. She also served as a Research Associate in the Department of Biology at Carleton University in Ottawa, Canada. While completing her postdoctoral training, Dr. Kloc-Stepkowska earned the AHFMR Research Award from the University of Calgary and the MRC Biotechnology Training Award from Dalhousie University. She joined the University of Texas M.D. Anderson Cancer Center as a Research Scientist in the Department of Molecular Genetics in 1987, and became an Associate Professor in the Department of Biochemistry and Molecular Biology there in 2006. Dr. Kloc-Stepkowska joined the Houston Methodist Research Institute in 2008.

Description of Research

Dr. Kloc-Stepkowska’s research focuses on investigations into the role of structural RNA in the organization of cellular cytoskeleton. She has numerous publications in the medical literature and her current studies are funded by the National Science Foundation. Dr. Kloc-Stepkowska also works closely with Dr. R. Mark Ghobrial on transplant immunomodulation studies using allochimeric molecules to improve transplant acceptance.

Areas Of Expertise

Immunology Transplant biology Structural RNA Cytoskeleton
Education & Training

Postdoctoral Fellowship , Department of Biochemistry, Dalhousie University, Halifax, Nova Scotia
Postdoctoral Fellowship , Department of Biology, University of Calgary, Calgary, Alberta
Postdoctoral Fellowship , Department of Chemistry, Saint Mary's University, Halifax, Nova Scotia
PhD , University of Warsaw
MS , University of Warsaw

Asymmetric divisions in oogenesis
Bilinski, SM, Kubiak, JZ & Kloc, M 2017, . in Results and Problems in Cell Differentiation. vol. 61, Results and Problems in Cell Differentiation, vol. 61, Springer-Verlag, pp. 211-228. DOI:

Role of Cdc6 During Oogenesis and Early Embryo Development in Mouse and Xenopus laevis
Borsuk, E, Jachowicz, J, Kloc, M, Tassan, JP & Kubiak, JZ 2017, . in Results and Problems in Cell Differentiation. vol. 59, Results and Problems in Cell Differentiation, vol. 59, Springer-Verlag, pp. 201-211. DOI:

Results and Problems in Cell Differentiation: Macrophages- Origin, Functions and Biointervention
Kloc, M (ed.) 2017, . vol. 62, 1st edn, Springer International Publishing. DOI:

Macrophages as effector cells in acute and chronic rejection.
Liu, Y, Kloc, M & Li, XC 2016, Topical Collection on Immunology, no. 4, vol. 3, vol. 3, Springer International Publishing. DOI:

Dissonant response of M0/M2 and M1 bone-marrow-derived macrophages to RhoA pathway interference
Liu, Y, Chen, W, Minze, LJ, Kubiak, JZ, Li, XC, Ghobrial, RM & Kloc, M 2016, Cell and Tissue Research, pp. 1-14. DOI:

Graft-Infiltrating Macrophages Adopt an M2 Phenotype and Are Inhibited by Purinergic Receptor P2X7 Antagonist in Chronic Rejection
Wu, C, Zhao, Y, Xiao, X, Fan, Y, Kloc, M, Liu, W, Ghobrial, RM, Lan, P, He, X & Li, XC 2016, American Journal of Transplantation, vol 16, no. 9, pp. 2563-2573. DOI:

Cytoskeleton and Cytoskeleton-Bound RNA Visualization in Frog and Insect Oocytes
Kloc, M, Bilinski, S & Kubiak, JZ 2016, Methods in molecular biology (Clifton, N.J.), vol 1457, pp. 179-90. DOI:

Gametic synapses, nanotubes and sperm RNAs - Redefining the origin of maternal determinants
Kloc, M, Kubiak, JZ & Bilinski, SM 2016, Mechanisms of Development, vol 141, pp. 1-3. DOI:

The Emerging Role of Nanotechnology in Cell and Organ Transplantation
Tasciotti, E, Cabrera, FJ, Evangelopoulos, M, Martinez, JO, Thekkedath, UR, Kloc Stepkowska, M, Ghobrial, RM, Li, XC, Grattoni, A & Ferrari, M 2016, Transplantation. DOI:

Early development of the gonads: Origin and differentiation of the somatic cells of the genital ridges
Piprek, RP, Kloc, M & Kubiak, JZ 2016, Results and Problems in Cell Differentiation, vol 58. DOI:

Hermes (Rbpms) is a Critical Component of RNP Complexes that Sequester Germline RNAs during Oogenesis
Aguero, T, Zhou, Y, Kloc, M, Chang, P, Houliston, E & King, ML 2016, Journal of developmental biology, vol 4, no. 1. DOI:

Mouse macrophage polarity and ROCK1 activity depend on RhoA and non-apoptotic Caspase 3
Liu, Y, Minze, LJ, Mumma, L, Li, XC, Ghobrial, RM & Kloc Stepkowska, M 2016, Experimental Cell Research, vol 341, no. 2, pp. 225-236. DOI:

ROCK inhibition impedes macrophage polarity and functions
Liu, Y, Tejpal, N, You, J, Li, XC, Ghobrial, RM & Kloc, M 2016, Cellular Immunology, vol 300, pp. 54-62. DOI:

Flexibility vs. robustness in cell cycle regulation of timing of M-phase entry in Xenopus laevis embryo cell-free extract
Debowski, M, El Dika, M, Malejczyk, J, Zdanowski, R, Prigent, C, Tassan, JP, Kloc, M, Lachowicz, M & Kubiak, JZ 2016, International Journal of Developmental Biology, vol 60, no. 7-9, pp. 305-314. DOI:

Macrophage/monocyte-specific deletion of Ras homolog gene family member A (RhoA) downregulates fractalkine receptor and inhibits chronic rejection of mouse cardiac allografts
Liu, Y, Chen, W, Wu, C, Minze, LJ, Kubiak, JZ, Li, XC, Kloc, M & Ghobrial, RM 2016, Journal of Heart and Lung Transplantation. DOI:

Pericytes, microvasular dysfunction, and chronic rejection
Kloc, M, Kubiak, JZ, Li, XC & Ghobrial, RM 2015, Transplantation, vol 99, no. 4, pp. 658-667. DOI:

TCTP silencing in ovarian cancer cells results in actin cytoskeleton remodeling and motility increase
Liu, Y, Zhang, L, Tejpal, N, Kubiak, JZ, Ghobrial, RM, Li, XC & Kloc, M 2015, Journal of Analytical Oncology, vol 4, no. 4, pp. 122-131.

Developmental Herpetology - State of the art of amphibian and reptile developmental biology
Kubiak, JZ & Kloc, M 2014, International Journal of Developmental Biology, vol 58, no. 10-12, pp. 719-721. DOI:

Bidder’s organ – Structure, development and function
Piprek, RP, Kloc, M & Kubiak, JZ 2014, International Journal of Developmental Biology, vol 58, no. 10-12, pp. 819-827. DOI:

Control of timing of embryonic M-phase entry and exit is differentially sensitive to CDK1 and PP2A balance
Dika, ME, Dudka, D, Prigent, C, Tassan, JP, Kloc, M & Kubiak, JZ 2014, International Journal of Developmental Biology, vol 58, no. 10-12, pp. 767-774. DOI: