Dense-packing hair grafting technique for restoration of cicatricial alopecia

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Zhonghua Zheng Xing Wai Ke Za Zhi 2002 Jul;18(4):219-20

Dense-packing hair grafting technique for restoration of cicatricial alopecia

OBJECTIVE: To investigate the possibility of using dense-packing hair grafting technique for restoration of cicatricial alopecia. METHODS: Under local anesthesia, a scalp strip was harvested from the back of the head. A series of micro-grafts with 1-3 hairs and mini-grafts with 4-6 hairs were created from this strip. In the scarring recipient area, micro-slots were made with a 18 G needle for the micro-grafts and mini-slits were made with a No. 64 mini-blade for the mini-grafts. The grafts were then implanted into these holes. RESULTS: Ninety-six patients with 128 bald scarring areas, resulted from burn, trauma or infection, were treated with the above-mentioned technique from April. 1998 to February. 2000. All of the patients were satisfied with the appearance. In the micro-graft area, the graft density reached 10-15 mini-grafts/cm2 per session. In the micro-graft area, the graft density reached 16-19 micro-grafts/cm2 per session. Postoperative following-up for more than 1 year showed that the grafted hairs were growing well with 90%-95% survival of the hair. One third of the patients obtained satisfactory results with only one session. Two thirds of the patients needed the second session to improve the appearance. CONCLUSIONS: The dense-packing hair grafting technique is a simple, safe and effective method for hair restoration surgery. It is not only used for male pattern baldness, but could also be applied for restoration of cicatricial alopecia.

Transgenic Res 2002 Jun;11(3):241-7

Inducible, reversible hair loss in transgenic mice.

Telogen effluvium is a common type of hair loss. Although the morphological changes associated with telogen effluvium have been well characterized, the underlying molecular mechanisms remain unknown, and no animal models have been developed. We report here that inducible transgenic mice expressing high levels of the transcription factor, tTA (tetracycline transactivator), plus a reporter luciferase gene, show a reversible hair loss phenotype. Skin of these mice exhibits an increase in the number of hair follicles at the telogen phase, but a decreased number of follicles at the anagen phase. These changes resemble skin pathology seen in patients with telogen effluvium, which suggests that the inducible transgenic mice may be useful as a model for this disorder. Moreover, since overexpression of several other transgenes failed to cause skin pathology, the present findings also indicate types of molecular abnormalities that may cause reversible hair loss.

J Dermatol Sci 2002 Aug;29(2):85-90

Antioxidant enzymes and lipid peroxidation in the scalp of patients with alopecia areata.

Alopecia areata (AA) is an autoimmune inflammatory disease. However, little is known about the alterations in lipid peroxidation and antioxidant enzymes in the scalp of patients with AA. Therefore, the aim of this study was to investigate the status of oxidative stress in the scalp of patients with AA. We measured the levels of thiobarbituric acid reactive substances (TBARS) as lipid peroxidation status, superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) as antioxidant enzymes in the scalp of ten patients with AA and ten control subjects. The levels of TBARS in scalp of patients with AA (3654.1+/-621.2 nmol/g tissue) were significantly higher than those of controls (1210.2+/-188.8 nmol/g tissue) (P=0.002). The levels of SOD (134.8+/-23.8 U/g tissue) and GSH-Px (332.7+/-66.2 U/g tissue) in scalp of patients with AA were also significantly higher than those of controls (63.2+/-8.8 U/g tissue, 112.0+/-18.4 U/g tissue, respectively) (P=0.019, P=0.002, respectively). The mean levels of TBARS, SOD and GSH-Px in early phase of disease were increased 2-fold as compared with late phase of the disease. These results indicate that oxidative status is affected in AA. Lipid peroxidation and antioxidant enzymes may be involved in the pathogenesis of AA. Furthermore, we found high SOD and GSH-Px activities in the scalp of patient with AA. These high levels could not protect the patients against the reactive oxygen species, because lipid peroxidation could not be lowered in AA patients.

J Invest Dermatol 2002 Feb;118(2):335-7

Interleukin-1 receptor antagonist allele 2 and familial alopecia areata.

Alopecia areata affects 1%-2% of the population and is hypothesized to be an autoimmune, organ specific T-cell mediated reaction directed against the human hair follicle. It is characterized by loss of hair in patches (alopecia areata) with progression in some individuals to total loss of scalp hair (alopecia totalis) or to loss of all scalp and body hair (alopecia universalis). The interleukin-1 receptor antagonist (IL-1RN) gene was found to be associated with more severe clinical outcome in several chronic inflammatory diseases, including alopecia areata. The IL-1RN*2 allele was found to be associated with alopecia areata severity in a British case-control study. In this paper, we analyzed alopecia areata probands in a family-based sample (n = 131 parent-offspring trios) to study the association between alleles of the IL-1RN and various phenotypes of alopecia areata. In considering all patients with any form of alopecia areata, no association was found with IL-1RN. IL-1RN*2 allele was not associated with alopecia totalis and alopecia universalis. A borderline association was observed between IL-1RN and patchy alopecia areata but it was not statistically significant (p =0.06). We also observed an association between IL1-RN*1 allele and patchy alopecia areata (p =0.045).

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