Cyclopentyladenosine improves cell proliferation, wound healing, and hair growth

Leon L. Sun, Linda L. Xu, Thor B. Nielsen, Peter Rhee, David Burris

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


Background. N6-Cyclopentyladenosine (CPA), a structural analog of adenosine, is a vasodilator with extensive pharmacological effects. However, little is known about the effect of CPA on wound healing and hair growth. Methods. Cellular responses to CPA were measured in vitro by tetrazolium dye reduction and in vivo by bromodeoxyuridine (BrdU) uptake. The effect of CPA on healing of incisional and excisional wounds on the dorsum of diabetic (db/db, n = 94) and nondiabetic (dbl+, n = 20) mice and hair growth along the wound margin was evaluated with wound breaking strength, wound closure rate, and quantitative histology. Results. CPA stimulated proliferation of BALB/3T3 fibroblasts and human dermal microvascular endothelial cells in both quiescent and nonquiescent phases. Wounds treated with CPA at 10 μM showed a significant increase in the number of BrdU-labeled cells, including keratinocytes, fibroblasts, endothelial cells, and cells in sebaceous glands and the outer root sheath of hair follicles, compared with controls (P < 0.05). CPA application (5.1 μg/daily for 12 days) significantly increased the breaking strength of incisional wounds at day 24 postwound (P < 0.05). Excisional wound closure rate in the CPA-treated group (3.4 μg/daily for 15 days) was accelerated starting at day 10 postwound compared with controls (P < 0.01). Tissue sections from CPA-treated wounds showed a sevenfold increase in hair follicle number, compared with controls (P < 0.01). Enhanced hair growth along the wound margin was revealed in CPA-treated groups. Conclusion. CPA stimulated proliferation of many cell types in vivo and in vitro and enhanced wound healing and hair growth. Therefore, CPA could be an interesting candidate for clinical application.

Original languageEnglish (US)
Pages (from-to)14-24
Number of pages11
JournalJournal of Surgical Research
Issue number1
StatePublished - Nov 1999
Externally publishedYes


  • Angiogenesis
  • Bromodeoxyuridine
  • Hair follicle
  • Wound strength

ASJC Scopus subject areas

  • Surgery


Dive into the research topics of 'Cyclopentyladenosine improves cell proliferation, wound healing, and hair growth'. Together they form a unique fingerprint.

Cite this