Expression of Fas and Fas Ligand in Various Skin Diseases / 대한피부과학회지

BACKGROUND: Fas and Fas ligand (FasL) are cell surface proteins that mediate apoptosis. Fas and FasL are expressed in normal epidermal cells, but are different in the expression patterns in epidermal layers. OBJECTIVE: The purpose of this study was to evaluate the expression of Fas and FasL in various skin diseases including non-tumorous diseases and tumors. METHOD: We performed immunohistochemical staining for Fas and FasL with monoclonal or polyclonal antibodies using frozen skin tissues from 29 patients. RESULTS: 1. In normal skin, Fas and FasL were expressed as intercellular and intracellular patterns. Fas was expressed in the basal and spinous layers, and FasL was expressed in the upper spinous and granular layers. 2. In psoriasis vulgaris and lichen planus, FasL expression was proportional to the degree of epidermal hyperplasia, such a relationship was not found in Fas expression. 3. In verruca vulgaris and herpes zoster, the upregulation of Fas and FasL expression was observed in lesional epidermis. 4. In skin tumors, Fas and FasL expression were observed in most tumor cells of Bowen's disease, keratoacanthoma, and squamous cell carcinoma. In basal cell carcinoma, FasL was expressed strongly and diffusely in the infiltrating tumor cells, but Fas was not expressed at all. CONCLUSION: Fas and FasL play an important role in the differentiating process of the epidermis by coordinate expression between them. In non-tumorous conditions and skin tumors, Fas and FasL might function as essential mediators of cellular turnover in pathogenesis of the skin diseases.

Expression of Fas and Fas Ligand in Various Skin Diseases / 대한피부과학회지

BACKGROUND: Fas and Fas ligand (FasL) are cell surface proteins that mediate apoptosis. Fas and FasL are expressed in normal epidermal cells, but are different in the expression patterns in epidermal layers. OBJECTIVE: The purpose of this study was to evaluate the expression of Fas and FasL in various skin diseases including non-tumorous diseases and tumors. METHOD: We performed immunohistochemical staining for Fas and FasL with monoclonal or polyclonal antibodies using frozen skin tissues from 29 patients. RESULTS: 1. In normal skin, Fas and FasL were expressed as intercellular and intracellular patterns. Fas was expressed in the basal and spinous layers, and FasL was expressed in the upper spinous and granular layers. 2. In psoriasis vulgaris and lichen planus, FasL expression was proportional to the degree of epidermal hyperplasia, such a relationship was not found in Fas expression. 3. In verruca vulgaris and herpes zoster, the upregulation of Fas and FasL expression was observed in lesional epidermis. 4. In skin tumors, Fas and FasL expression were observed in most tumor cells of Bowen's disease, keratoacanthoma, and squamous cell carcinoma. In basal cell carcinoma, FasL was expressed strongly and diffusely in the infiltrating tumor cells, but Fas was not expressed at all. CONCLUSION: Fas and FasL play an important role in the differentiating process of the epidermis by coordinate expression between them. In non-tumorous conditions and skin tumors, Fas and FasL might function as essential mediators of cellular turnover in pathogenesis of the skin diseases.

Early prediction of birth weight percentile and large for gestational age fetuses using gestation-adjusted projection of estimated fetal weight / 대한산부인과학회잡지

OBJECTIVE: To evaluate the accuracy of predicted birth weight percentile and large for gestational age(LGA) fetuses by the gestation-adjusted projection method using estimated fetal weight. METHODS: From 462 low-risk pregnancies with singleton fetus, fetal biometry including fetal biparietal diameter(BPD), head circumference(HC), abdominal circumference(AC), and femur length(FL) was made from 30 weeks of gestation until term. Estimated fetal weight(EFW) by combinations of fetal biometry were made by Campbell, Hadlock1, Hadlock2, and Shepard formulas respectively. The diagnostic accuracy according to 4 formulas was assessed by correlation between EFW percentile and birth weight percentile, prediction of LGA fetuses, and prediction error(percentile difference between birth weight and EFW). RESULTS: The mean gestational age on ultrasound and on birth, and birth weight were 33.21 +/- 2.08(30-40) weeks, 38.43 +/- 1.72(30-42) weeks, and 3.14 +/- 0.47(0.99-4.38) Kg, respectively. The diagnostic accuracies of gestation-projection method using EFW were similar result to predict birth weight percentile and LGA fetuses according to 4 formulas. Correlation between EFW percentile and birth weight percentile(correlation coefficient, r) were Campbell: 0.644(p <0.001), Hadlock 1: 0.682(p <0.001), Hadlock 2: 0.681(p <0.001), Shepard: 0.638(p <0.001), respectively. Youden's index(sensitivity + specificity - 1) in prediction of LGA fetuses were Campbell: 0.532, Hadlock1: 0.525, Hadlock2: 0.520, Shepard: 0.549, respectively. Prediction error were Campbell: 18.14+/-16.56, Hadlock1: 16.19+/-14.35, Hadlock2: 16.10+/-14.29, Shepard: 19.68+/-17.00, respectively. The prediction error was increased according to increasing of lapse time(p <0.001), gestational weeks on ultrasound, and estimated fetal weight percentile, and decreasing birth weight percentile(p <0.001)(R square=0.411, (p <0.001). But, amniotic fluid index did not affect to prediction error(p=0.199). CONCLUSION: Our study presented relatively accurate prediction for birth weight percentile and LGA fetuses from remote sonographic examination. If LGA fetuses was suspected by antenatal ultrasound, adequate therapy and periodic observation are recommended for good perinatal outcome.

Fetal Cardiotocogram for Prediction of Adverse Neonatal Outcome in Thick Meconium Stained Pregnancy / 대한산부인과학회잡지

No abstract available.

Allele Sequence Variations of GABARB1 Locus and Allele Frequency by New Allele Designation in Korean / 대한법의학회지

To determine allele frequency of GABARB1 Jcus in Korean, first, we sequenced each allele, which was amplified with primers that published before. We found mismatching between allele number and size of each allele when 'GATA' repeats are counted. The sequence revealed new 'GATA' repeat. So we had made new allele designation with total number of in 176 Korean people. The heterozygosity this locus was 0.716 and mean exclusion chance (MEC) and power of discrimination (PD) were 0.433 and 0.845, respectively. In this study, we emphasized necessity of sequencing of 2-3 alleles, which have same size before setting up allelic ladder.