Krugluger W, Moser K, Moser C, Laciak K, Hugeneck J. Enhancement of in vitro hair shaft elongation in follicles stored in buffers that prevent follicle cell apoptosis.
Dermatol Surg 2004;
30:1-5; discussion 5. [PMID:
14692918 DOI:
10.1111/j.1524-4725.2004.30010.x]
[Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND
Viability and survival of stored micrografts during hair follicle transplantation are important limitations of micrograft transplantation procedures. In this study, we investigated the effect of different storage solutions and inhibitors of apoptotic cell death (ACD) on hair follicle cell viability by measuring in vitro hair shaft elongation (HSE) for 5 days.
METHODS
Micrografts from informed patients undergoing routine micrograft transplantation were stored for 5 hours at room temperature in phosphate-buffered salt solution (PBS) or HEPES-buffered Dulbecco's modified Eagle's medium (DMEM), containing different concentrations of the ACD-inhibitors aminoguanidine (AMG), hormones (insulin, hydrocortisone), 14,15-epoxy-eicosatrienoic acid (14,15-EET), or combinations of these.
RESULTS
In vitro, HSE was significantly increased in micrografts stored in DMEM compared with PBS (2.3%+/-0.6% vs. 28.4%+/-3.9%, P<0.0001). DMEM supplemented with AMG (10 microg/mL) or 14,15-EET (1 ng/mL) further increased in vitro HSE (33.9%+/-7.1%, p=0.01, and 32.8%+/-6.1%, P=0.02, respectively). Evaluation of ACD in stored micrografts, performed by determination of cytoplasmic histone-associated DNA fragments, confirmed the results found by HSE. ACD was detectable after a 36-hour culture in serum-containing medium and was higher in micrografts stored in PBS compared with micrografts stored in DMEM (A405nm/A492nm: 1.63+/-0.21 vs. 1.42+/-0.07, respectively; P<0.01). The addition of AMG further decreased serum-induced ACD in the micrografts (DMEM 1.42+/-0.07 vs. DMEM/AMG 0.90+/-0.11, P<0.0001).
CONCLUSION
Our study demonstrated an important role of ACD in micrograft transplantation surgery. Preconditioning of micrografts with storage buffers containing inhibitors of ACD could prevent serum-induced ACD after transplantation and might increase the viability of micrografts and the clinical outcome in micrograft transplantation.
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