BACKGROUND: Factors that regulate hair matrix cell division within the hair follicles and control hair growth cycle have been poorly understood untill now. One of the main.causes seems to be lack of good in vitro models. OBJECTIVE: This study was performed to investigate the hair growth promoting potencies of several agents including individual components of keratinocyte growth media. METHODS: Several agents such as epidermal growth factor, insulin, bovine pituitary extract which were contained in keratinocyte growth media as well as minoxidil and transforming growth factor-α were added to the isolated anagen hair follicles. Measuring the length of hair follicle, thymidine and leucine uptake were used for hair growth parameter. RESULTS: Isolated anagen hair follicles in keratinocyte growth media showed a significant increase in length over 48 hours. [Methyl-³H] thymidine and [U-¹⁴Cl leucine uptake were sustained at basal state as well as over 48 hours and [methyl-³H] thymidine uptake increased in the matrix cells under autoradiography. Insulin with a concentration above 0.5µg/ml and transforming growth factor-α with a concentration above 10ng/ml showed a promoting effect on hair growth. However, other agents did not promote hair growth at all. CONCLUSION: Our in vitro model resembles the in vivo status of hair growth for a limited period of time and we think that normal human hair organ culture may be a useful model for developing hair growth promoting agents in vitro.
Autoradiography ; Cell Division ; Epidermal Growth Factor ; Hair Follicle* ; Hair* ; Humans ; In Vitro Techniques ; Insulin ; Intercellular Signaling Peptides and Proteins* ; Keratinocytes ; Leucine ; Minoxidil ; Organ Culture Techniques* ; Thymidine

This study was undertaken to investigate the optimal conditions for challenge testing with DNCB in 3 vehicles applied to guinea pigs in standardized amount/ area (pg/cm2) The results are sumrnarized as follows: 1) All test reactions were negative when tested in 10 unsensitized animals. 2) There were significant difference in positive rate between 0. 05%, DNCB in alcohol and 0.1% DNCB in alcohol, but there were no significant difference between 0. l%, DNCB in alcohol and 0, 2% DNCB in alcohol. Same results were obtaincd when DNCR was dissolved in acetone. 3) Acetone gives the significantly higher degree of positive reactions, indicating that alcohol may be the safer vehicle in eliciting a response than acetone. 4) With DNCB in olive oil, relatively few animals reacted compared to the results obtained with alcohol and acetone. Furthermore, olive oil is slippery and difficult to utilize when attempting to delineate surface area. 5) With alcohol, we obtained a good correlation between the amount applied and the resulting response, showing that this vehicle might be a superior vehicle in eliciting contact allergy.
Acetone ; Animals ; Dinitrochlorobenzene* ; Guinea Pigs* ; Guinea* ; Hypersensitivity* ; Olea ; Olive Oil

Formaldehyde and its derivatives are used to improve the wet strength, waterresistance, shrink-resistance, grease-resistance and other characteristics of paper and. paper products. We have recently analyzed 78 different kinds of paper sources which are being used in Korea by the lutidine method. The forma.ldehyde concentrations of the most paper sources were under 50 ug/gm ranges except 4 copying paper sources which were in the 50 to 100 ug/gm ranges.
Formaldehyde* ; Korea

The subject were 653 male patients with uncomplicated gonorrhea at the VD Clinic of Choong Ku Public Health Center in Seoul from January to November 1985. 653 male patients with uncomplicated gonococcal infection were treated one of the following regimens. Five treatment regimens used were 2, 0 gm spectinomycin single 1M, 4 0 mega unit fortified procain penicillin G+2. 0 gm kanamycin sulfate IM preceded by 1 pgm probenecid PO, 6.0 mega unit fortified procain penicillin G+2 pgm kanamycin sulfate IM preceded by 1. 0 gm probenecid PO, 5, 0 rnega unit aqueous crystaline penicillin+2. 0 gm kanamycin sulfate irn preceded by 1, 0 gm probenecid PO and 9 tablets of cotrimoxazole+ 2. 0 gm kanamycin sulfate IM. There were no significant differences in the incidence of PGU among the five treatment groups. The overall PGU rate was 67.3% 59.2% and 53.6% at 3~5, 7~10 and 14 days after treatment respectively. The incidence of PGU at 7-10 days was not significantly higher than that of at 14 days after treatment. It is suggested that it is best to test PGU at 7 days after treatment. Because the longer one waits, the harder to follow the patients, and in earlier period, post-inflammatory irritation might be too frequent. It is also suggested that at 3 5 days after treatment examination of urethritis might serve to compare the effect of treatment regimens on the incidence of PGU.
Gonorrhea ; Humans ; Incidence ; Kanamycin ; Male ; Penicillins ; Probenecid ; Public Health ; Seoul ; Spectinomycin ; Tablets ; Urethritis*

No abstract available.
9,10-Dimethyl-1,2-benzanthracene* ; Animals ; Breast Neoplasms* ; Breast* ; Estrogens* ; Rats*

Fifty-six patients with tinea versicolor were studied clinically and therapeutically, from July 1984 to August 1985, at the Department of Dermatology, Hanyang University. L atients were treated with 20g sodium thiosulfate solution, 1g isoconazole nitrate cream, lg bifonazole cream and. oral ketoconazole. The result obtained were as follows: 1. The average age of all patients at visit was RO. 1 years, the oldest patient was 72 year-old and the youngest patient was 13 year-old. The male to female ratio was 3. 7: 1. 2. Distribution of lesions were anterior chest(26.8%), back(23.9%), abdomen (19%), axilla (17%), neck(6. 3%), pubic area(4. 2%), upper extremities(1. 4%), hip(0.7%) and lower extremities(0.7%). The incidence of hyperpigmented lesions was 76. 8%, and that of hypopigmented lesions was 23. 2g. 3. Average of treatment duration in each trial group indicated 3. 71-I--0 83 weeks (M+SD) in 20g sodium thiosulfate regimen group, 3. 07+ 0. 73 weeks in 1g isoconazole nitrate, 3.29+1.14 weeks in bifonazole, R. 00+0. 68 weeks in oral ketoconazole. No treatment results show statistically significant differences among the trial groups.
Abdomen ; Adolescent ; Aged ; Axilla ; Dermatology ; Female ; Humans ; Incidence ; Ketoconazole ; Male ; Sodium ; Tinea Versicolor* ; Tinea*

No abstract available.
Humans ; Infant, Very Low Birth Weight* ; Critical Care*

No abstract available.
Humans ; Orthopedics*

No abstract available.
Humans ; Orthopedics*

Idiopathic small bowel ulceration occurring beyond the duodenum is rare, and less than 5% of all the reported cases have occurred in children. In most of the cases, single ulcer of unknown cause is observed in jejunum or ileum. The diagnosis is difficult and usually made at the time of surgical exploration for the complications, such as perforation, hemorrhage or obstruction. We experienced a case of perforation of idiopathic ileal ulceration due to blunt abdominal trauma in a 11-year-old boy. The ileal segment including the lesion was resected and the pathologic findings were compatible with idiopathic small bowel ulceration. The clinical and pathological aspects are discussed, and the literatures were reviewed.
Child* ; Diagnosis ; Duodenum ; Hemorrhage ; Humans ; Ileum ; Jejunum ; Male ; Ulcer*