RESUMO
BACKGROUND: Atopic dermatitis is a chronic itchy, inflammatory skin disease that usually relapses. Although the etiology of atopic dermatitis remains unclear, it has been shown that both Th1 and Th2 cytokines play pathogenic roles in the generation of atopic dermatitis. DA-9102 is a fraction from the Actinidia species and DA-9102 displays immune modulating activity for allergy related disease. OBJECTIVE: We have developed the atopic dermatitis model of NC/Nga mice using DNCB and we examined whether DA-9102 suppresses the development of atopic dermatitis-like skin lesions on NC/Nga mice. METHODS: NC/Nga mice were challenged with DNCB during 5 weeks to develop atopic dermatitis-like skin lesions. Daily DA-9102 or cyclosporine A or HPMC (control) were then given orally. The efficacy of DA-9102 in NC/Nga mice was judged by measurement of the skin lesion severity (a modified SCORAD score), the serum IgE and IgG2a levels and the cytokine levels (IFN-gamma and IL-4) from spleen cells cultured with ConA. RESULTS: Atopic dermatitis-like lesions were developed on the NC/Nga mice by using topical DNCB. Oral administration of 100 mg/kg DA-9102 significantly suppressed the development of dermatitis, as was analyzed by a modified SCORAD score (p<0.01). The serum IgE level increased gradually with age, but treatment with DA-9102 suppressed the increment of the serum IgE level (p<0.01). The mean values of IFN-gamma in the NC/Nga mice of the DA-9102 group were lower than those of the control mice group (p<0.05). The mean values of IL-4 were undetectable in all the experimental groups. The serum IgG2a level were not significantly different among all the experimental groups. CONCLUSION: We successfully developed an atopic dermatitis model in NC/Nga mice. Based on our in in vitro data, we suggest that DA-9102 can be useful for the treatment of atopic dermatitis.
Assuntos
Animais , Camundongos , Actinidia , Administração Oral , Ciclosporina , Citocinas , Dermatite , Dermatite Atópica , Dinitroclorobenzeno , Hipersensibilidade , Imunoglobulina E , Imunoglobulina G , Interleucina-4 , Recidiva , Pele , Dermatopatias , BaçoRESUMO
BACKGROUND: Although it is well known that transforming growth factor beta (TGF-beta) may induce catagen change of hair follicles and inhibit hair growth, it is still unclear which subtype of TGF-beta and its specified receptor might be expressed in human hair follicles of androgenetic alopecia (AGA) patients. OBJECTIVE: To delineate precise expression of TGF-beta subtype in human hair follicles of androgenetic alopecia patients. METHODS: Immunohistochemical studies were performed on paraffin sections of human hair follicles by applying type 1, 2, and 3 TGF-beta antibodies and type I and II receptor antibodies. We ascertained the expression of TGF-beta subtype in hair follicles of androgenetic alopecia patients. We also compared the expression pattern of each type of TGF-beta receptor. We evaluated the change of TGF-beta expression of hair follicles in the catagen phase. RESULTS: TGF-beta1 was well-expressed in the outer area of the inner root sheath (IRS) or dermal connective sheath area. TGF-beta2 was commonly expressed in the inner 1/2 of the outer root sheath (ORS). TGF-beta3 was expressed in the hair cortex, IRS, and cuticle in normal hair follicles obtained from both the vertex and occipital area. On the contrary, in specimens from AGA, the enhanced expression of type 2 TGF-beta or type II receptor was observed in the vertex area (bald) compared to the occipital area (non bald). When the expression patterns of TGF-beta 1, 2, and 3 were compared between anagen and catagen phases, TGF-beta2 and 3 were positively expressed in the epithelial strands and secondary hair germs in the catagen phase. The immunoreactivities of TGF-beta 1 and 2 were intensified in the ORS areas of the catagen phase. CONCLUSION: The expression of type 1, 2 TGF-beta and type I and II receptors in follicular epithelial cells might be related to catagen induction and development of androgenetic alopecia of human hair in vivo.
Assuntos
Humanos , Alopecia , Anticorpos , Células Epiteliais , Folículo Piloso , Cabelo , Parafina , Receptores de Fatores de Crescimento Transformadores beta , Fator de Crescimento Transformador beta , Fator de Crescimento Transformador beta1 , Fator de Crescimento Transformador beta2 , Fator de Crescimento Transformador beta3RESUMO
STI571 (imatinib mesylate, Gleevec(TM)), a selective inhibitor of the bcr-abl, c-kit, platelet-derived growth factor receptor tyrosine kinases, is a new anticancer drug used for chronic myelogenous leukemia and gastrointestinal stromal tumors. Cutaneous adverse reactions of periorbital edema and exfoliative dermatitis related to STI571 are rare and there have been no previous reports in the Korean literature. We herein report a case of periorbital edema and exfoliative dermatitis due to STI571 and discuss the possible mechanism of periorbital edema related to STI571.
Assuntos
Dermatite Esfoliativa , Toxidermias , Edema , Tumores do Estroma Gastrointestinal , Leucemia Mielogênica Crônica BCR-ABL Positiva , Mesilatos , Fosfotransferases , Receptores do Fator de Crescimento Derivado de Plaquetas , Tirosina , Mesilato de ImatinibRESUMO
Desmoplastic trichoepithelioma is a rare benign tumor which is most commonly found on the face of young females. The tumor has a raised, annular border and a depressed center. The histologic features are often confused with other skin diseases, especially with microcystic adnexal carcinoma. We report, herein, a case of desmoplastic trichoepithelioma in a 26-year-old man, confirmed by re-biopsy and CEA immunohistochemical study.