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Lois Johanna Arend, M.D., Ph.D.

Director, Pathology Clinical Fellowship Programs
Associate Professor of Pathology


Appointment Phone


Main Location

The Johns Hopkins Hospital

Out-of-State & International Patients +
Out of State Patients

Call 410-464-6641 (8a.m. to 6p.m., EST, Mon-Fri)

Learn more about our out-of-state patient services »

International Patients

Call +1-410-502-7683 (7a.m. to 6p.m., EST, Mon-Fri)

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  • Director, Pathology Clinical Fellowship Programs
  • Program Director, Renal Pathology Fellowship Training Program
  • Associate Professor of Pathology

Centers & Institutes



The Johns Hopkins Hospital

Appointment Phone: 410-955-2386

600 N. Wolfe Street
Sheikh Zayed Tower
Baltimore, MD 21287 map
Phone: 443-287-0166


Pathology, Transplant Pathology

Research Interests

Renal pathology


Dr. Lois Arend is an associate professor of pathology at the Johns Hopkins University School of Medicine. Her areas of clinical expertise include renal pathology and transplant pathology. Dr. Arend serves as the program director of the renal pathology fellowship training program and director of clincial fellowships.

Dr. Arend earned her Ph.D. and M.D. from Michigan State University. She completed her residency in pathology and performed a fellowship in renal pathology at the University of Michigan Medical School.

Her research interests include the mechanisms of mammalian kidney development, transplant pathology, and renal pathology. more

    Additional Information

  • Education +


    • Michigan State University Medical Education and Research Center / MD (1992)


    • University of Michigan Medical School / Pathology (1996)


    • University of Michigan Medical School / Pathology (1998)


    • American Board of Pathology / Anatomic Pathology (1995)
  • Research & Publications +

    Research Summary

    Dr. Arend's laboratory studies the mechanisms of mammalian kidney development. Specifically, their studies involve various cell and molecular biology techniques to determine the role of the bioactive sphingolipid, sphingosine-1-phosphate (S1P), in organogenesis of the kidney. Their research indicates that S1P may be involved in development of conditions such as cystic kidney disease and Meckel syndrome. They also study the pathologic aspects of other kidney disease by various morphologic techniques, including light, immunofluorescence and electron microscopy.

    Selected Publications

    1. Nie X, Arend LJ. Novel roles of Pkd2 in male reproductive system development. Differentiation. 2014 March–April; 87(3–4): 161–171.
    2. Nie X, Arend LJ. Pkd1is required for male reproductive tract development. Mech Dev. 2013 Nov-Dec;130(11-12):567-76.
    3. Kirby RJ, Jin Y, Fu J, Cubillos J, Swertfeger D, Arend LJ. "Dynamic regulation of sphingosine-1-phosphate homeostasis during development of mouse metanephric kidney." Am J Physiol Renal Physiol. 2009 Mar;296(3):F634-41. doi: 10.1152/ajprenal.90232.2008. Epub 2008 Dec 10.
    4. Lorenz JN, Arend LJ, Robitz R, Paul RJ, MacLennan AJ. "Vascular dysfunction in S1P2 sphingosine 1-phosphate receptor knockout mice." Am J Physiol Regul Integr Comp Physiol. 2007 Jan;292(1):R440-6. Epub 2006 Sep 21.
    5. Fu J, Jin Y, Arend LJ. "Smac3, a novel Smac/DIABLO splicing variant, attenuates the stability and apoptosis-inhibiting activity of X-linked inhibitor of apoptosis protein." J Biol Chem. 2003 Dec 26;278(52):52660-72. Epub 2003 Sep 30.
    6. Phillips CL, Arend LJ, Filson AJ, Kojetin DJ, Clendenon JL, Fang S, Dunn KW. "Three-dimensional imaging of embryonic mouse kidney by two-photon microscopy." Am J Pathol. 2001 Jan;158(1):49-55.
    7. Arend LJ, Smart AM, Briggs JP. "Mouse beta(6) integrin sequence, pattern of expression, and role in kidney development." J Am Soc Nephrol. 2000 Dec;11(12):2297-305.
    8. Arend LJ, Smart A, Briggs JP. "Metanephric rat-mouse chimeras to study cell lineage of the nephron." Dev Genet. 1999;24(3-4):230-40.

    Kirby RJ, Swertfeger, D, Arend LJ. Crosstalk between GDNF/RET and S1P/S1PR signaling pathways regulates kidney epithelial cell migration. In Preparation.

  • Academic Affiliations & Courses +
  • Activities & Honors +

    Professional Activities

    • 2012 - 2013
      Leadership Program for Women Faculty
  • Videos & Media +
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