The sunscreening effect can be varied according to the vehicles. Therefore the purpose of this study is to compare the effect of vehicles(bases) on sun protection in p-aminobenzoic acid, cinnamate and benzophenone sunscreens with same concentration (2.5%), We included ointment (white petrolatum), cream (hydrophilic), milky lotion and alcohol as the sunscreen vehicles. The test results can be summarized as follows: We could not recognize a sunscreening effect of sunscreen vehicles which did not contain sunscreening agent. In the case of p-aminobenzoic acid, the mean sun protection factor was higher in the sequence of cream, milky lotion, alcohol, ointment, each showing 9, 95+/-3.67, 8.09+/-2.56, 5.14+/-1.45, 4.35+/-1.46 respectively. In the case of cinnamate, the mean sun protection factor was higher in the sequence of cream, ointment, milky lotion, alcohol, each showing 6 46+/-1.89, 5.42+/-1.49, 4.82+/-1.84, 4.05+/-1.45 respectively. 4. In the case of benzophenone, the mean sun protection factor was higher in the sequence of cream, alcohol, ointment, milky lotion, each showing 5 .26+/-1.56, 4.94+/-1.24, 4.56+/-1.71, 4.18+/-1.23 respectively.
4-Aminobenzoic Acid ; Skin* ; Solar System ; Sun Protection Factor ; Sunscreening Agents

We have observed the dark effect of 8-methoxypsoralen(8-M(P) on the viability and DNA synthesis in human lymphocyte cultures after stimulaticn with phytohemagglutinin (PHA) in the absence of ultraviolet A radiation. The concentratioiis of 8-MOP was 0.5-32 ug/ml. We have also measured the LDH activity in supernatant. of lymphocyte cultures treated with 8-MOP. The results were as follows: 1. There was no 8-MOP dose-dependent decrease in the viability of lymphocytes up to 8- MOP 32pg/ml. 2. There was a 8-MOP dose-dependent decrease in PHA-induced DNA synthesis of lymphocytes from the concentration of 8-MOP 2 ug/ml. 3. There was a time-dependent decrease in PHA-induced DNA synthesis of lymphocytes at the concentration of 8-MOP 32 ug/ml. 4. There was no LDH release in supernatant of lymphocyte ciltu es after incubation with 8-MOP up to 8-MOP 32ug/ml.
Animals ; DNA ; Ear* ; Humans ; Lymphocytes ; Methoxsalen ; Mice ; Mice, Inbred C57BL* ; Photochemotherapy* ; Skin*

In this experiment 40 adult male C57BL mice were used. The one ear of each animal was irradiated with high pressure mercury lamp (Burdick'UV-800) and the other ear was covered with nontransparent tape. Using split epidermal sheets treated with DOPA solution, a quatitiative study of epidermal melanocyte was carried out from the exposed and the shielded ear continuously on every second day during 14 daily exposures to 100 mJ/cm of UVB. The results were as follows : 1. Repeated radiation with ultraviolet light elicited a significant increase in population of melanocytes and the possible mechanism is a direct replication of the functioning melanocytes. 2. UVB irradiation induced increase in the number of epidermal melanocytes in covered ear as well as in irradiated ear. It is suggested that the population increase in the shielded skin is initiated by one or more systemic factors originating from the UVB irradiated skin.
Adult ; Animals ; Dihydroxyphenylalanine ; Ear* ; Humans ; Male ; Melanocytes* ; Mice ; Mice, Inbred C57BL* ; Skin ; Ultraviolet Rays

The present study was undertaken to inveatigate whether contaet sensitivity was decreased or not in patients with atopic dermatitis, and to investigate phagocytic function of neutrophils in patients with atopic dermatitis. 1. Dinitrochlorobenzene (DNCB), a compound which uniformly induce hypersensitivity in normal individuals, had been used in the preaent study to investigate cutaneous anergy in 16 patients with atopic dermatitis. Sensitizing does of DNCB (2,000 microgram) was applied and examined at 7th and 14th day for a spontaneous flare. In the absence of spontaneous flare, challenge dose (50microgram) was reapplied and examined. Seven of the 16 cases (43.8%.) had positive reaction to DNCB. These result showed decreased contact sensitivity in patients with atopic dermatitis, which suggested some defect in the cell-mediated immunity in patients with atopic dermatitis. 2. There were some evidence that susceptibility to certain infection was increased in patients with atopic dermatitis. For investigating killing function in phagoeytosis of neutrophils in patients with atopic dermatitis, nitroblue tetrazolium dye reduction (NBT) and stimalated NBT test had performed in 35 cases of atopic dermatitis and 20 cases of healthy control. 1) There was no significant difference in the mean percentage and absolute number of NBT positive neutrophils between whole group of atopic dermatitis (8. 4+4. 9%, 301.2+225.6) and control group (6. 9+2. 9%, 246.2+143. 8). 2) The mean percentage and absolute number of stmulated NBT poeitive neutrophils in whole group of atopic dermatitis (19.6+7.3%, 702. 1+377. 2) did not differ significantly from control group (22.7+5.3%, 812.2+382.2). 3) There was no significant difference in the mean value of NBT aad stimulated NBT test in comparing the mild groud, moderate group and severe group with control group. These resuIts suggested that killing function in phagocytosis of neutrophils in patients with atopic dermatitis was not impaired.
Dermatitis, Atopic* ; Dermatitis, Contact ; Dinitrochlorobenzene* ; Homicide ; Humans ; Hypersensitivity ; Immunity, Cellular ; Neutrophils ; Nitroblue Tetrazolium ; Phagocytosis

This study was undertaken to observe the effect of the preirradiation of UVA on the eryt,hematous reaction by UVB. Twenty-five healthy Korean adult male volunteers were taken as subjects. The results were as follows: 1)Preirradiation of 10J/cm and 20j/cm of UVA had no influence on the erythematous reaction induced by UVB. Preirradiation of 30 J/cm of UVA decreased the minimal erythemal dose(MED) of UVB significantly (p<0,05), and 4pJ/cm of UVA dicl very significantly(p<0. 001). 2) Preirradiation dose of UVA(x) and MED of UVB(y) had statistically significant relationship (y=33. 23 - 33 x, r= -0.39, p<0. 05). So preirradiation of UVA decreased MED of UVR in relation with the preirradiation dose. 3) For the objective criteria of skin erythematous reaction induced by the UV irradiation, MED was considered more accurate and efficient than minimal perceptible dose (MPI).
Adult ; Erythema* ; Humans ; Male ; Skin ; Volunteers

BACKGROUND: The Ingram regimen has been advocated for t.he treatment of psoriasis. It is an effective therapeutic moiality, but its complexity and frequent side reactions have restricted its use for therapy. There are several modified Ingrarn regimen, change of vehicle, shortening of application time, low-strerigth anthralin, combination with emollient. Previously, we have reportved the effectiveness of mocified Ingram regimen for psoriasis, however, the remission time and relapse rate of psoriasis has not been reported in Korea. OBJECTIVE: This study was performed to evaluate the efficacy of the modified Ingram region for the treatment of psoiasis and the remission time and relapse rate of psoriasis following moclified Ingram therapy. METHODS: Sixty patients with plaque-form psoriasis were treated with the modified Ingra,n therapeutic regimen. They were divided into two groups, a moderate group which included 39 patients, and 21 patients in a severe group. RESULTS: The follwing results were obtained from this study. 1. Among 60 patients, 52 patients(86.6%) were successfully healed and 8 patients(13.3%) showed failure in their t eatment. 2. In 52 patients, 44 patients(73.3%) showed a clearing of psoriasis, 8 patients(13.3%) showed some improvement. 3. In 44 cleared patients mean numbers and duration of therapy reaching grade 4 were 13.0 and 21.0 days for the trunk and 15.1 and 24.7 days for the extremities, the difference was not significant statistically(p>0.05). The difference between the total dose in trunk and extremitis was significant statistica,ly(p<0.05). 4. In 44 cleared patients mean numbers, duration and total dose of therapy reaching grade 4 in the severe group were significantly higher than those in the moderate group (p<0.05). 5. There were some rotable side effects such as staining(17.3%), erythema(15.4%) and pruitus(13.5%), but in no case therapy was terminated. 6. According to the everity in 33 of the cleared patients, we observed 10 patients(17.4%) with early relapse((6 months), 7(21.7%) with late relapse(>6 months) and 14(60.9%) with riorelapse(>12 months) in the moderate group and also observed 10 patients(70.0%) with early IP, lapse, 2(20.0%) with latrelapse and 1(10.0%) with no relapse in the severe group. 7. In 33 pat,ients who were followed up at least one year later, the mean time of remission was 31.4 months in the moderate group and 6.0 mont,hs in the severe group. There were signilicant differences in the two groups(p<0.05). CONCLUSION: The results of this study suggest that the modified Ingram regimen is one of the effective therapeutic mocialities for cases of moderate psoriasis.
Anthralin ; Extremities ; Humans ; Korea ; Psoriasis* ; Recurrence

BACKGROUND: The xenon arc solar simulator is the most commonly used light source in studies on immediate tanning, but there has been no report on the immediate tanning response in Korean skin induced by UVA from that source. OBJECTIVE: This study was conducted to measure the minimal immediate tanning dose(MITD) for UVA in Korean, brown skin. Methods: UVA irradiation was performed on normal back skin of twenty-six healthy Korean young adults, with increasing doses from 0.5J/cm2 to 4.5J/cm2 using xenon arc solar simulator equipped with appropriate filters. Visual assessment of MITD was done by two investigators. Results: The mean and standard deviations of MITD were 2.38+/- 0.65J/cm2 in 26 subjects. MITDs distributed from 1.0J/cm2 to 3.5J/cm2. There were no significant differences of MITD between skin type III and IV. Conclusion: Conclusively, we obtained the data on the MITD in Korean skin induced by UVA from the solar simulator. The results of this study may be valuable for the research into photomedicine and useful data for evaluating sunscreens.
Humans ; Research Personnel ; Skin ; Sunscreening Agents ; Tanning* ; Triacetoneamine-N-Oxyl* ; Xenon ; Young Adult*

Photosensitive psoriasis is a rare disease defined as psoriasis in which the lesions deteriorate or new lesions develop after sun exposure. It should be differentiated from other photosensitive conditions that may be a vated or confused on sun-exposure. Half of the patients have a history of polymorphic light eruption(PMLE), whieh several weeks later develops into psoriasis lesions and the others have no history of preceding PMLE reaction. PUVA therapy is recommended for the treatment of choice. In this report, we describe two cases of photosensitive psoriasis. A 51-year-old woman without underlying psoriasis suffered from erythemato-squamous papular lesions on the face, neck and dorsum of hands after sun-exposure. She revealed a lowered minimal erythema dose(MED) for UVA which was confused with a photosensitive disease. But characteristic psariatic plaques on the elbow, knee and palm and histologic findings made the diagnosis photosensitive psoriasis. She showed a good result to cyclosporine therapy. The other patient, a 44-year-old woman with underlying psoriasis, experienced an exacerbation with preceding PMLE and showed a lowered erythema threshold for UVB. She was treated with sun-screen and topical corticosteroids.
Adrenal Cortex Hormones ; Adult ; Cyclosporine ; Diagnosis ; Elbow ; Erythema ; Female ; Hand ; Humans ; Knee ; Middle Aged ; Neck ; Psoriasis ; PUVA Therapy ; Rare Diseases ; Solar System

Calcipotriol, a synthetic analogue of calcitriol(1,25-dihydroxyvitamin D) is as active as calcitriol in inducing cell differentiation and inhibiting cell pralifiration but at least 100 times less active than calcitriol in its effect on calcium metabolism. We report a case of psoriasis in a 28 year old male who was treated with calcipotriol ointment on the right forearm. The therapeutic effect of calcinoipotriol ointment was compared with desoxymethason, cream applied on the left forearm. Both topical agents reduced equally the degrees of scale, erythema and thickness of the lesions. We observed that the calcipotriol ointment was effective in the treatment of psoriasis n this case.
Adult ; Calcitriol ; Calcium ; Cell Differentiation ; Erythema ; Forearm ; Humans ; Male ; Metabolism ; Psoriasis*

Both irritation and staining reaction of anthralin on the skin are the two most important problem of therapy. Irritation, such as erythema, edema and staining by p. lg anthralin ointment were studied with the chamber-testing technique in 21 psoriatic patients. We campared the skin reaction of short exposure time, such as 1 hour, 2 hours, and 3 hours with those of exposure of 24 hours through 3 days after application. The results were as follows: l. Incidence of erytherna reaction was 81.9% in exposure of 1 hour, 85.7%, in 2 hours, 90.5%, in 3 hours and 100% in exposure of 24 hours. Degree of erythema reaction was increased according to duration of application. 2. There were no edematous reactions in exposure of 1 hour or 2 hours, 9,5% in 3 hours and 28,6% of grade 1 reaction in 24 hours. 3. There was no staining reaction in exposure of 1 hour, 48% in 2 hours, 9.5%, in 3 hours and 71.4% in 24 hours. Degree of staining reaction elicited by short exposure time were all weaker than reaction caused by 24 hours exposure.
Anthralin* ; Edema ; Erythema ; Humans ; Incidence ; Skin*