AIM: Ultraviolet light (UV) is known to cause DNA damage in the epidermis. The damaged DNA is repaired or deleted by apoptosis to prevent the generation of cancer. It has been suggested that a deficient apoptotic mechanism may predispose individuals to skin cancer. Therefore, the response of normal controls and patients with basal cell carcinoma (BCC) to UV irradiation was investigated. METHODS: The buttock skin from normal volunteers and patients with BCC was irradiated using solar simulated radiation (SSR). SSR mimics the effect of natural sunlight. Skin biopsies were excised and examined for p53, p21, and Bax protein expression and for the induction of apoptosis. RESULTS: At 33 hours after UV irradiation, the induction of apoptosis was significantly higher (p = 0.04) in patients with BCC than in normal volunteers (Mann Whitney test). A trend towards higher p21 expression was found at 33 hours in patients with BCC (mean, 18.69 positive cells/field) than in normal volunteers (mean, 9.89), although this difference was not significant (p = 0.05 positive cells/field). CONCLUSION: These results may imply that patients with BCC have enhanced sensitivity to UV irradiation or that there is some defect in the cell arrest or repair pathways, which results in damaged cells been pushed into apoptosis rather than repair.
AIM: Ultraviolet light (UV) is known to cause DNA damage in the epidermis. The damaged DNA is repaired or deleted by apoptosis to prevent the generation of cancer. It has been suggested that a deficient apoptotic mechanism may predispose individuals to skin cancer. Therefore, the response of normal controls and patients with basal cell carcinoma (BCC) to UV irradiation was investigated. METHODS: The buttock skin from normal volunteers and patients with BCC was irradiated using solar simulated radiation (SSR). SSR mimics the effect of natural sunlight. Skin biopsies were excised and examined for p53, p21, and Bax protein expression and for the induction of apoptosis. RESULTS: At 33 hours after UV irradiation, the induction of apoptosis was significantly higher (p = 0.04) in patients with BCC than in normal volunteers (Mann Whitney test). A trend towards higher p21 expression was found at 33 hours in patients with BCC (mean, 18.69 positive cells/field) than in normal volunteers (mean, 9.89), although this difference was not significant (p = 0.05 positive cells/field). CONCLUSION: These results may imply that patients with BCC have enhanced sensitivity to UV irradiation or that there is some defect in the cell arrest or repair pathways, which results in damaged cells been pushed into apoptosis rather than repair.
Authors: A Ziegler; D J Leffell; S Kunala; H W Sharma; M Gailani; J A Simon; A J Halperin; H P Baden; P E Shapiro; A E Bale Journal: Proc Natl Acad Sci U S A Date: 1993-05-01 Impact factor: 11.205
Authors: A Kricker; D R English; P L Randell; P J Heenan; C D Clay; T A Delaney; B K Armstrong Journal: Med J Aust Date: 1990-04-16 Impact factor: 7.738
Authors: Yashodhar P Bhandary; Shwetha K Shetty; Amarnath S Marudamuthu; Margaret R Gyetko; Steven Idell; Mehrnaz Gharaee-Kermani; Rashmi S Shetty; Barry C Starcher; Sreerama Shetty Journal: Am J Physiol Lung Cell Mol Physiol Date: 2011-12-02 Impact factor: 5.464
Authors: Magdalena Ciążyńska; Grażyna Kamińska-Winciorek; Dariusz Lange; Bogumił Lewandowski; Adam Reich; Martyna Sławińska; Marta Pabianek; Katarzyna Szczepaniak; Adam Hankiewicz; Małgorzata Ułańska; Jan Morawiec; Maria Błasińska-Morawiec; Zbigniew Morawiec; Janusz Piekarski; Dariusz Nejc; Robert Brodowski; Anna Zaryczańska; Michał Sobjanek; Roman J Nowicki; Witold Owczarek; Monika Słowińska; Katarzyna Wróbel; Andrzej Bieniek; Anna Woźniacka; Małgorzata Skibińska; Joanna Narbutt; Wojciech Niemczyk; Karol Ciążyński; Aleksandra Lesiak Journal: Sci Rep Date: 2021-02-22 Impact factor: 4.379