BACKGROUND: Superoxide dismutases (SOD) are important metallo-enzymes which scavenge and dismutase the superoxide free radical. They are thought to be the main enzymes in the antioxidant defense system. In the several cell ines the induction of Mn-SOD expression by tumor necrosis factor (TNF)-alpha which is a known inflammatory cytokine, suggests that Mn-SOD may play a role in the inflammatory process. However, this effect is occurred. OBJECTIVE: The present study was undertakento determine whether the induction of SOD expression by TNF-alpha, in the keratinocytes is occurred. METHODS: Primary keratinocyte cultures from neonatal foreskins were grown in complete MCDB 153 medium. Measurement of superoxide radical and SOD activity were performed according to Babior and Fridovich methods, respectively. RESULTS: 1. The release of superoxide radical were measured after 30, 60, 90 minutes exposure to 10ng/ms TNF-alpha, THE RESULTS SHOWS 2.94+/-0.30 NMOL/2x105, 3.55+/-0.52 NMOL/2x105, 4.13+/-0.70 nmol/2x105 respectivelyl The increase of superoxide radical release was detectable in a time dependent manner. 2. Total SOD activity without treatment of TNF-alpha at 24 hours was 18.46+/-2.85, Total SOD activities after treatment of 1, 10, 100 ng/ml TNF-alpha at 24hours were 36.47+/-6.80, 88.01+/-7.79, 94.50+/-8.97 respectively, which suggested that TNF-alpha induced increase of total SOD significantly (p<0.050. TNF-alpha stimulate total SOD induction in a dose and time dependent manner, although the effects were not outstanding. Mn-SOD activity after treatment of 100 ng/ml TNF-alpha at 48 hours was 84.12+/-14.83, which was approxdimately 10.5 fold of that of the untredated case. TNF-alpha also induced the Cu, Zn-SOD activity, but the effect was not so much as in the case of Mn -SOD. CONCLUSION: TNF-alpha induces production of total SODD activities, especially Mn-SOD in the human kerati ocytes, which may be to protect cells from inflammation mediated oxidative damage, namely production of total SOD protein, especially Mn-SOD in response to TNF-alpha induced and scavenged overproduced superoxide radical which in turn may result in protection of the keratinocytes.
Foreskin ; Humans* ; Inflammation ; Keratinocytes* ; Superoxide Dismutase* ; Superoxides* ; Tumor Necrosis Factor-alpha*

BACKGROUND: Superoxide disrnutase(SOD) provides a protective defease mechanism against potential cytotoxicity of superoxide radical in the aerobic organism. Although human skin is constantly at risk for developing acute and chronic changes by ultraviolet radiation and phototoxic reactions with exogenous and endogenously procluced photosensitizing molecules, studies in SOD in the human skin are rare. OBJECTIVE: We measured the level of SOD activities in the scar tissues and the normal human skin specimens. This study was to investigate changes of SOD activity by age, sex, and regional differences of SOD activities in the scar issues and the normal skin. METHODS: Aut,hors assayed the level of SOD activit,ies in 32 scar tissues(male 8, female 24) and 11 normal human skin specimens(male 8, female 3), which were obtaine 3 from face/neck(17 and 3 specimens), forearm(only 4 scar tissues), trunk(10 and 8 specimens), and lower extremity(only 1 scar tissue). RESULTS: First, activities of total SOD, Cu, Zn-SOD, and Mn-SOL ere 18.93+5.49, 16.97+55.31, and 1.96+0.90 units/mg proteiii respectively in the scar tissues. Second activities of total SOD, Cu, Zn-SOD, and Mn-SOD were 17.27+7.09, 13.82+6.44, and 3.45+1.07 units/mg protein respectively in the normal skin. Third, the changes of total SOD, Cu, Zn-SOD, and Mn-SOD activities by age and sex were similar each other and three were no significant, differneces between age groups in total, Cu, Zn- SOD, and Mn-SOD activities. Fourth, in sun exposed area and unexposed area there were no significant differences in the scar tissues in SOD activities. But, SOD activite.(total, Cu, Zn, and Mn-SOD) in face/neck were higher than those in trunk and lower extremity in tae normal skin(P<0.05). CONCLUSION: These findings suggest that there are no differences in the intrinsic SOD activities by age and sex in the mature scar tissues and the normal skin. Differences between exposed and unexposed area in the normal skin are due to the induction of exogenous SOD activity by sun-light generation of superoxide radicals. In wound, increased production of leukocyte derived superoxide radicals is the main factor of increased level of SOD activity.
Cicatrix* ; Female ; Humans ; Leukocytes ; Lower Extremity ; Skin ; Solar System ; Superoxide Dismutase* ; Superoxides* ; Wounds and Injuries

BACKGROUND: The large surfaces of the skin are often initial site of contact between microorganism and human. The skin are coated with epidermis and epithelial cells can recognize microorganism and mount a fast defense through the production of various inducible antibiotic peptides. This leads to chracteristic broad spectrum of antimicrobial activity against bacteria, fungi, and viruses. Recent studies introduce us new peptides with antimicrobial activity such as P,-defensins and cathelicidins. They are expressed on the epithelia and polymorphonuclear leukocytes, which are first lines of defence from various invasive environments. Futhermore, they are considered very interesting and important endogenous antibiotics. Our previous study has shown that the expression of human defensin(hBD-2) mRNA, which is potent antibiotic peptide against Gram-negative bacteria(P. aeruginosa), was upregulated with ultraviolet(UV) irradiation, tumor necrosis factor-α(TNF-α) and lipopolysaccharide(LPS) in HaCaT cells. A novel hBD-3, 5-kDa, nonhemolytic antimicrobial peptide, was demonstrated a salt-insensitive broad spectrum of potent antimicrobial activity against many potentially pathogenic microbes in especially, multiresistant S. aureus. We have analyzed the expression patterns of hBD-3 in HaCaT cell lines. OBJECTIVE: This research have done in order to evaluate the expression and regulation of hBD-3 mRNA in human keratinocyte cell lines. METHODS: HaCaT cell lines were used to all culture experiments. Cultured human keratinocytes were stimulated with UV irradiation or TNF-α or LPS to determine whether hBD-3 mRNA production occurred. Reverse transcription-polymerase chain reaction (RT-PCR) was per-formed to amplify hBD-3 cDNA from stimulated keratinocytes in a time dependant manner, and densitometry was used to verify the specificity of RT-PCR amplication products. RESULTS: Expression of hBD-3 was upregulated with UV irradiation, TNF-α and LPS in Ha-CaT cells compared to control CONCLUSIONS: Human keratinocytes are capable to induce hBD-3 mRNA, as well as hBD-2, in response to UV irradiation, TNF-α and LPS. suggesting that these cells could play an important role against the bacterial infection and UV light damage in human skin.
Anti-Bacterial Agents ; Bacteria ; Bacterial Infections ; Cathelicidins ; Cell Line* ; Densitometry ; DNA, Complementary ; Epidermis ; Epithelial Cells ; Fungi ; Humans* ; Keratinocytes ; Necrosis ; Neutrophils ; Peptides ; RNA, Messenger ; Sensitivity and Specificity ; Skin ; Ultraviolet Rays

To know the effect of subconjunctival injection of liposome encapsulated cytarabine on proliferation of conjunctival fibroblasts, the conjunctiva was isolated at 180 degrees from the injection site 3 days after subconjunctival injection of the normal saline (control), cytarabine, liposome encapsulated cytarabine, and 1 day after injection of cytarabine, and then those were inoculated in the culture media of fibroblasts. In the case of 3 days after injection of cytarabine, there was 49% and 42% inhibition of proliferation of conjunctival fibroblasts compared with the control respectively. Therefore, the authors concluded that the liposome encapsulated cytarabine is effective on inhibition of proliferation of conjunctival fibroblasts and reduces the frequencies of subconjunctival injection compared with the cytarabine itself.
Conjunctiva ; Culture Media ; Cytarabine* ; Fibroblasts* ; Liposomes*

No abstract available.
Dermatitis, Exfoliative ; Phototherapy ; Psoriasis

Pretibial myxedema, which consists of localized cutaneous accumulations of acid mucopolysaccharides, oceurs in a few patients with hyperthyroidi';m after its correction by surgery or radioactive iodine therapy. We report a case of pretibial myxedema with exophthalmos in a 36 year old male. He has suffered from hyperthyroidism with bilateral pretibial myxedema for a period of 4 years. He was treated with a subtotal thyroidectomy and excision of both pletibia lesions 1 year ago. The lesions recurred on t,he left pretibial area, as a 11 X 16cm sized, non pitting, non tender, swollen, brownish plaque. The histopathologic findings showed epidermal hyperkeratosis and a considerable arnount of mucin in the mid-dermis. We treat.ed him with intralesional injection of triamcinolone acetonide with marked improvement.
Adult ; Exophthalmos ; Glycosaminoglycans ; Humans ; Hyperthyroidism ; Injections, Intralesional ; Iodine ; Male ; Mucins ; Myxedema* ; Thyroidectomy ; Triamcinolone Acetonide

Angiogenesis is an essential process in tumor growth and metastasis. VEGF has been considered a leading candidate inducing tumor angiogenesis. VEGF expression was significantly correlated with clinical stage, lymph node matastasis, and prognosis of cancers of various parts of body. However, little has been known about the correlation between VEGF expression and clinicopathologic parameters in oral squamous cell carcinoma. The aim of this study was to correlate VEGF expression with the clinicopathological parameters and microvessel density. Forty six oral squamous cell carcinomas were analyzed using immunohistochemical method with primary antibodies to VEGF and CD31. VEGF expression was detected in 33 (71.7%) of the 46 cases. The microvessel density was significantly correlated with VEGF expression (P=0.002). There was no correlation between microvessel density and tumour size, clinical stage, and lymph node metastasis, respectively. VEGF expression did not correlate with the histological grade of tumour differentiation, tumour size, and clinical stages. The VEGF-positive rate seemed to be higher in patients with cervical lymph nodal metastasis than in those without it, but it was not statistically significant. In conclusion, the overexpression of VEGF in the oral squamous cell carcinoma seemed to be associated with a more aggressive course of the disease. Further study is necessary to define the role of VEGF in oral squamous cell carcinoma.
Antibodies ; Carcinoma, Squamous Cell* ; Humans ; Lymph Nodes ; Microvessels* ; Neoplasm Metastasis ; Prognosis ; Vascular Endothelial Growth Factor A*

Cutaneous horns of the penis are rare. We report a case associated with squamous cell carcinoma in a 56-year-old male. A gradually enlarging nodule had been on the glans penis for four years. He had suffered from an erythematous crusted tumor mass and horny excrescence on the glans penis which recurred and was aggravated after excision of the nodule seven months ago. Histopathologic findings of the lesions showed characteristic findings of squamous cell carcinoma and cutaneous horn. In situ DNA hybridization for human papillomavirus types 6, 11, 16, 18, 32, and 33 were all negative. The tumor mass were surgically excised and we have not found any sign of recurrence since then.
Animals ; Carcinoma, Squamous Cell* ; DNA ; Epithelial Cells* ; Horns* ; Humans ; Male ; Middle Aged ; Penis* ; Recurrence

PURPOSE: Parathyroid injury is the major cause of post-thyroidectomy hypocalcemia. This prospective study aimed to define the relation between the preservation status of the parathyroid glands and post-thyroidectomy hypocalcemia as well as to determine whether the number of preserved parathyroid glands could be a guideline for the management of post-thyroidectomy hypocalcemia. METHODS: We analyzed a total of 76 cases of total thyroidectomy due to malignancy were analysed. Parathyroid gland status at the end of thyroidectomy was classified as preserved intact, discolored (color change or equivocal viability), or autotransplanted. Patients were grouped according to the number of intact preserved parathyroid glands into group 1 (more than two), group 2 (one), or group 3 (zero). The total and ionized serum calcium levels of each group were monitored for three days after surgery. RESULTS: The number of intact preserved parathyroid glands was not found to be closely related to serum calcium level, although ionized serum calcium level was significantly lower in group 1 than group 2 (P<0.001). Hypocalcemia was not found in group 1. Hypocalcemia was found in 31% (10/32) of group 2. Among the 32 patients of group 2, all 4 parathyroid gland were identified in 9 patients and 4 patients were shown to be hypocalcemic. Therefore, the incidence of hypocalcemia for patients in whom only one intact parathyroid was preserved and all 4 parathyroid were indentified was 44% (4/9). Hypocalcemia was transient in all patients. CONCLUSION: The parathyroid glands should be preserved as much as possible to minimize post-thyroidectomy hypocalcemia. The number of intact preserved parathyroid glands can be a good guideline for predicting post-thyroidectomy hypocalcemia and proper care management.
Calcium ; Humans ; Hypocalcemia* ; Incidence ; Parathyroid Glands ; Prospective Studies ; Thyroidectomy*

Basaloid follicular hamartoma (BFH) is a benign adnexal tumor with a wide spectrum of clinical appearance and is characterized histologically by the presence of branching cords and thin strands of undifferentiated anasomosing, basaloid proliferations that are embedded in a fibrous stroma. It has been often misdiagnosed and treated as basal cell carcinoma. We report a 57-year-old woman with BFH on the face which is similar to basal cell carcinorna clinically that turned out to be a solitary BFH histologically. There has been no recurrence during one year of follow up after excisional biopsy.
Biopsy ; Carcinoma, Basal Cell ; Female ; Follow-Up Studies ; Hamartoma* ; Humans ; Middle Aged ; Recurrence