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Xutong Sun

Research Associate Professor

Center for Translational Science, Environmental Health Sciences

Phone: 772-345-4779



Mitochondrial dysfunction related pulmonary hypertension and acute lung injury


Xutong Sun earned a bachelor’s degree in marine biology from the Qingdao Ocean University, a master degree in cell biology from Hebei Normal University and a PhD in developmental biology from Qingdao Ocean University in China. Afterward, Sun did a postdoctoral research in molecular biology at Seto Marine Biological Laboratory of Kyoto University in Japan. From 2002 to 2006, she has worked as a postdoc fellow in Medical College of Georgia. From 2006 till now, Sun joined Dr. Stephen Black’s lab and has served in the following positions: research associate, research specialist principal, senior scientist, research assistant professor and research associate professor.


  • Qingdao Ocean University, Ph.D.
  • Hebei Normal University, MS
  • Qingdao Ocean University, BS

Publications / Research

Wu X, Sun X, Sharma S, Lu Q, Yegambaram M, Hou Y, Wang T, Fineman JR, Black SM. Arginine recycling in endothelial cells is regulated BY HSP90 and the ubiquitin proteasome system. Nitric Oxide. 2021 Mar 1;108:12-19.

Xutong Sun, Qing Lu, Manivannan Yegambaran, Sanjiv Kumar, Ning Qu, Anup Srivastava, Ting Wang, Jeffrey Fineman, Stephen M. Black. TGF-β1 attenuates mitochondrial bioenergetics in pulmonary arterial endothelial cells via the disruption of carnitine homeostasis. Redox Biology. Epub 2020 May 31.

Kumar S, Sun X, Noonepalle SK, Lu Q, Zemskov E, Wang T, Aggarwal S, Gross C, Sharma S, Desai AA, Hou Y, Dasarathy S, Qu N, Reddy V, Lee SG, Cherian-Shaw M, Yuan JX, Catravas JD, Rafikov R, Garcia JGN, Black SM. Hyper-activation of pp60 Src limits nitric oxide signaling y increasing Asymmetric Dimethylarginine Levels during acute lung injury. Free Radic Biol Med. 2017 Jan;102:217-228. 

Boehme J, Sun X, Tormos KV, Gong W, Kellner M, Datar SA, Kameny RJ, Yuan JX, Raff GW, Fineman JR, Black SM, Maltepe E.  Pulmonary artery smooth muscle cell hyperproliferation and metabolic shift triggered by pulmonary overcirculation. Am J Physiol Heart Circ Physiol. 2016 Oct 1;311(4):H944-H957.

Sun X, Kellner M, Desai AA, Wang T, Lu Q, Kangath A, Qu N, Klinger C, Fratz S, Yuan JX, Jacobson JR, Garcia JG, Rafikov R, Fineman JR, Black SM. Asymmetric dimethylarginine stimulates Akt1 phosphorylation via Hsp70-facilitated Carboxyl-Terminal modulator protein degradation in pulmonary endothelial cells. Am J Respir Cell Mol Biol.  2016 Aug; 55(2):275-87.

Sun X*, Kumar S*, Sharma S*, Aggarwal S, Lu Q, Gross C, Rafikova O, Lee SG, Dasarathy S, Hou Y, Meadows ML, Han W, Su Y, Fineman JR, Black SM. Endothelin-1 Induces a Glycolytic Switch in Pulmonary Arterial Endothelial Cells via the Mitochondrial Translocation of Endothelial NO Synthase. Am J Respir Cell Mol Biol. 2014 Jan 6.

Rafilov R, Rafikova O, Aggarwal S, Gross C, Sun X, Desai J, Fulton D, Black SM. Asymmetric dimethylarginine induces endothelial nitric-oxide synthase mitochondrial redistribution through the nitration-mediated activation of Akt1. J Biol Chem. 2013 Mar 1;288(9):6212-26.

Sun X*, Sharma S*, Fratz S*, Kumar S, Rafikov R, Aggarwal S, Rafikova O, Lu Q, Burns T, Dasarathy S, Wright J, Schreiber C, Radman M, Fineman JR, Black SM. Disruption of endothelial cell mitochondrial bioenergetics in lambs with increased pulmonary blood flow. Antioxid Redox Signal. 2013 May 10;18(14):1739-52.

Sharma S*, Sun X*, Kumar S, Rafikov R, Aramburo A, Kalkan G, Tian J, Rehmani I, Kallarackal S, Fineman JR, Black SM.  Preserving mitochondrial function prevents the proteasomal degradation of GTP cyclohydrolase I. Free Radic Biol Med. 2012 Jul 15;53(2):216-29.

Sun X, Fratz S, Sharma S, Hou Y, Rafikov R, Kumar S, Rehmani I, Tian J, Smith A, Schreiber C, Reiser J, Naumann S, Haag S, Hess J, Catravas JD, Patterson C, Fineman JR, Black SM. CHIP-dependent GTP cyclohydrolase I degradation underlies the decrease in tetrahydrobiopterin levels in lambs with increased pulmonary blood flow: Role of asymmetric dimethylarginine.  Am J Respir Cell Mol Biol. 2011 Jul;45(1):163-71.

Complete List of Published Work in MyBibliography: