Photo of Pin-Xian Xu

Pin-Xian Xu

  • PROFESSOR Genetics and Genomic Sciences
  • PROFESSOR Developmental and Regenerative Biology
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  • Ph.D., The Graduate University for Advanced Studies, Japan

  • Postdoctoral fellow, Harvard Medical School/Brigham & Women's Hospital


  • 2007 -
    NIH Scientific Review Group UKGD

  • 2000 - 2003
    Research Award
    National Science Foundation

  • 1999 - 2000
    Recipient of 50th Anniversary Program for Scholars in Medicine Fellowship
    Harvard Medical School

  • 1997 - 2000
    Individual National Research Service Award
    National Eye Institute/NIH


Pin-Xian Xu’s laboratory studies regulatory networks that drive organogenesis. In particular, our lab is interested in the general question of how cell diversity in our body is created. A major focus of our research is auditory and renal development and maintenance, where we seek to identify the pathways by which EYA1 drives a small group of progenitor cells to become functional sensory neurons and hair cells in the inner ear or nephrons in the kidney. For more detailed information, please consult our lab website.


Xu J, Xu PX. Eya-six are necessary for survival of nephrogenic cord progenitors and inducing nephric duct development before ureteric bud formation. Developmental dynamics : an official publication of the American Association of Anatomists 2015 Jul; 244(7).

Eisner A, Pazyra-Murphy MF, Durresi E, Zhou P, Zhao X, Chadwick EC, Xu PX, Hillman RT, Scott MP, Greenberg ME, Segal RA. The Eya1 phosphatase promotes Shh signaling during hindbrain development and oncogenesis. Developmental cell 2015 Apr; 2(1).

Xu J, Wong EY, Cheng C, Li J, Sharkar MT, Xu CY, Chen B, Sun J, Jin D, Xu PX. Eya1 interacts with Six2 and Myc to regulate expansion of the nephron progenitor pool during nephrogenesis. Developmental Cell 2014 Nov; 31(4).

Yan J, Zhang L, Xu J, Sultana N, Hu J, Cai X, Li J, Xu PX, Cai CL. Smad4 regulates ureteral smooth muscle cell differentiation during mouse embryogenesis. PLoS One 2014 Aug; 9(8).

Xu J, Nie X, Cai X, Cai CL, Xu PX. Tbx18 is essential for normal development of vasculature network and glomerular mesangium in the mammalian kidney. Developmental Biology 2014 Jul; 391(1).

Bao S, Zhu L, Zhuang Q, Wang L, Xu PX, Itoh K, Holzman IR, Lin J. Distribution dynamics of recombinant Lactobacillus in the gastrointestinal tract of neonatal rats. PloS One 2013 Mar; 8(3).

Sun J, Karoulia Z, Wong EY, Ahmed M, Itoh K, Xu PX. The phosphatase-transcription activator EYA1 is targeted by anaphase-promoting complex/Cdh1 for degradation at M-to-G1 transition. Molecular and Cellular Biology 2013 Mar; 33(5).

Wong EY, Ahmed M, Xu PX. EYA1-SIX1 complex in neurosensory cell fate induction in the mammalian inner ear. Hearing Research 2013 Mar; 297.

Rinkevich Y, Mori T, Sahoo D, Xu PX, Bermingham JR, Weissman IL. Identification and prospective isolation of a mesothelial precursor lineage giving rise to smooth muscle cells and fibroblasts for mammalian internal organs, and their vasculature. Nature Cell Biology 2012 Dec; 14(12).

Ahmed M, Xu J, Xu PX. EYA1 and SIX1 drive the neuronal developmental program in cooperation with the SWI/SNF chromatin-remodeling complex and SOX2 in the mammalian inner ear. Development (Cambridge, England) 2012 Jun; 139(11).

Ahmed M, Wong EY, Sun J, Xu J, Wang F, Xu PX. Eya1-Six1 interaction is sufficient to induce hair cell fate in the cochlea by activating Atoh1 expression in cooperation with Sox2. Developmental Cell 2012 Feb; 22(2).

Xu PX. The EYA-SO/SIX complex in development and disease. Pediatric Nephrology 2013 Jun; 28(6).

Nie X, Xu J, El-Hashash A, Xu PX. Six1 regulates Grem1 expression in the metanephric mesenchyme to initiate branching morphogenesis. Developmental Biology 2011 Apr; 352(1).

Nie X, Sun J, Gordon RE, Cai CL, Xu PX. SIX1 acts synergistically with TBX18 in mediating ureteral smooth muscle formation. Development (Cambridge, England) 2010 Mar; 137(5).

Chen B, Kim EH, Xu PX. Initiation of olfactory placode development and neurogenesis is blocked in mice lacking both Six1 and Six4. Developmental Biology 2009 Feb; 326(1).

Zou D, Erickson C, Kim EH, Jin D, Fritzsch B, Xu PX. Eya1 gene dosage critically affects the development of sensory epithelia in the mammalian inner ear. Human Molecular Genetics 2008 Nov; 17(21).

Hoskins BE, Cramer CH, Silvius D, Zou D, Raymond RM, Orten DJ, Kimberling WJ, Smith RJ, Weil D, Petit C, Otto EA, Xu PX, Hildebrandt F. Transcription factor SIX5 is mutated in patients with branchio-oto-renal syndrome. American Journal of Human Genetics 2007 Apr; 80(4).

Grifone R, Demignon J, Giordani J, Niro C, Souil E, Bertin F, Laclef C, Xu PX, Maire P. Eya1 and Eya2 proteins are required for hypaxial somitic myogenesis in the mouse embryo. Developmental Biology 2007 Feb; 302(2).

Zou D, Silvius D, Rodrigo-Blomqvist S, Enerbäck S, Xu PX. Eya1 regulates the growth of otic epithelium and interacts with Pax2 during the development of all sensory areas in the inner ear. Developmental Biology 2006 Oct; 298(2).

Zou D, Silvius D, Davenport J, Grifone R, Maire P, Xu PX. Patterning of the third pharyngeal pouch into thymus/parathyroid by Six and Eya1. Developmental Biology 2006 May; 293(2).

Sajithlal G, Zou D, Silvius D, Xu PX. Eya 1 acts as a critical regulator for specifying the metanephric mesenchyme. Developmental Biology 2005 Aug; 284(2).

Zou D, Silvius D, Fritzsch B, Xu PX. Eya1 and Six1 are essential for early steps of sensory neurogenesis in mammalian cranial placodes. Development (Cambridge, England) 2004 Nov; 131(22).

Grifone R, Laclef C, Spitz F, Lopez S, Demignon J, Guidotti JE, Kawakami K, Xu PX, Kelly R, Petrof BJ, Daegelen D, Concordet JP, Maire P. Six1 and Eya1 expression can reprogram adult muscle from the slow-twitch phenotype into the fast-twitch phenotype. Molecular and Cellular Biology 2004 Jul; 24(14).

Ruf RG, Xu PX, Silvius D, Otto EA, Beekmann F, Muerb UT, Kumar S, Neuhaus TJ, Kemper MJ, Raymond RM, Brophy PD, Berkman J, Gattas M, Hyland V, Ruf EM, Schwartz C, Chang EH, Smith RJ, Stratakis CA, Weil D, Petit C, Hildebrandt F. SIX1 mutations cause branchio-oto-renal syndrome by disruption of EYA1-SIX1-DNA complexes. Proceedings of the National Academy of Sciences of the United States of America 2004 May; 101(21).

Zheng W, Huang L, Wei ZB, Silvius D, Tang B, Xu PX. The role of Six1 in mammalian auditory system development. Development (Cambridge, England) 2003 Sep; 130(17).

Xu PX, Zheng W, Huang L, Maire P, Laclef C, Silvius D. Six1 is required for the early organogenesis of mammalian kidney. Development (Cambridge, England) 2003 Jul; 130(14).

Buller C, Xu X, Marquis V, Schwanke R, Xu PX, Peters H, Xu X. Molecular effects of Eya1 domain mutations causing organ defects in BOR syndrome. Human Molecular Genetics 2001 Nov; 10(24).

Xu X, Xu PX, Marquis V, Schwanke R, Xu PX. A modified cryosection method for mouse testis tissue. Tissue & Cell 2001 Apr; 33(2).

Xu PX, Adams J, Peters H, Brown MC, Heaney S, Maas R. Eya1-deficient mice lack ears and kidneys and show abnormal apoptosis of organ primordia. Nature Genetics 1999 Sep; 23(1).

Xu PX, Zhang X, Heaney S, Yoon A, Michelson AM, Maas RL. Regulation of Pax6 expression is conserved between mice and flies. Development (Cambridge, England) 1999 Jan; 126(2).

Xu PX, Cheng J, Epstein JA, Maas RL, Michelson AM, Maas RL. Mouse Eya genes are expressed during limb tendon development and encode a transcriptional activation function. Proceedings of the National Academy of Sciences of the United States of America 1997 Oct; 94(22).

Xu PX, Woo I, Her H, Beier DR, Maas RL. Mouse Eya homologues of the Drosophila eyes absent gene require Pax6 for expression in lens and nasal placode. Development (Cambridge, England) 1997 Jan; 124(1).

Industry Relationships

Physicians and scientists on the faculty of the Icahn School of Medicine at Mount Sinai often interact with pharmaceutical, device and biotechnology companies to improve patient care, develop new therapies and achieve scientific breakthroughs. In order to promote an ethical and transparent environment for conducting research, providing clinical care and teaching, Mount Sinai requires that salaried faculty inform the School of their relationships with such companies.

Dr. Xu did not report having any of the following types of financial relationships with industry during 2015 and/or 2016: consulting, scientific advisory board, industry-sponsored lectures, service on Board of Directors, participation on industry-sponsored committees, equity ownership valued at greater than 5% of a publicly traded company or any value in a privately held company. Please note that this information may differ from information posted on corporate sites due to timing or classification differences.

Mount Sinai's faculty policies relating to faculty collaboration with industry are posted on our website. Patients may wish to ask their physician about the activities they perform for companies.

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