In vivo enhanced expression of patched dampens the sonic hedgehog pathway

Ivan Bergstein, Philip L. Leopold, Noboru Sato, Andrei A. Panteleyev, Angela M. Christiano, Ronald Crystal

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10 Citations (Scopus)


The sonic hedgehog (SHH)-patched (PTCH) pathway functions in normal embryonic development of the brain, musculoskeletal system, and hair follicles, and in normal post-natal control of hair follicles. Dysregulation of the pathway has been implicated in a variety of neoplasias, including those of skin and brain. Based on the knowledge that generalized, prolonged PTCH expression can inhibit the effects of SHH signaling, we tested the hypothesis that localized transient overexpression of PTCH would inhibit the phenotype of SHH-induced accelerated growth of hair follicles. Adenovirus (Ad)-mediated transient over-expression of Shh (AdShh) in telogen (8 weeks) mouse skin induced anagen hair growth as demonstrated by histology and gross appearance. Strikingly, local intradermal administration of a Ptch-expressing adenovirus (AdPtch), but not a Null control adenovirus (AdNull), 18 hours before AdShh injection, significantly blocked this phenotype, with 100% of AdPtch + AdShh mice failing to advance to anagen compared with AdNull + AdShh mice and AdShh mice (30% and 45% failing to advance to anagen, respectively). Thus, PTCH expression mediated by gene transfer can modulate the SHH signaling pathway in the adult mammal and may serve as a starting point for therapies relevant to clinical conditions resulting from dysregulation of this pathway as well as for strategies to suppress normal SHH-dependent processes, such as hair growth.

Original languageEnglish
Pages (from-to)258-264
Number of pages7
JournalMolecular Therapy
Issue number2
Publication statusPublished - 1 Jul 2002
Externally publishedYes



  • Adenovirus
  • Gene therapy
  • Hair follicle
  • Patched
  • Skin
  • Sonic hedgehog

ASJC Scopus subject areas

  • Molecular Medicine
  • Molecular Biology
  • Genetics
  • Pharmacology
  • Drug Discovery

Cite this

Bergstein, I., Leopold, P. L., Sato, N., Panteleyev, A. A., Christiano, A. M., & Crystal, R. (2002). In vivo enhanced expression of patched dampens the sonic hedgehog pathway. Molecular Therapy, 6(2), 258-264.