BACKGROUND: Human repeated insult patch tests (HRIPTs) are a final method for safety assessment of chemical ingredients. In the representative HRIPTs, the Shelanski and modified Draize require 200 participants, but the maximization and modified maximization tests require only 25. OBJECTIVE: To evaluate the safety of three sunscreen ingredients using the Shelanski and maximization methods. METHODS: Octylmethoxycinnamate, butylmethoxydibenzoylmethane, and octyltriazone (BASF) were prepared for the induction, as 25% ointment in white petrolatum base. After a 2-3 week resting phase, patch and photopatch tests were conducted, but pretreatment with SLS was only performed in the maximization test. The results were analyzed using the Chi-Square test. RESULTS: During the induction phase, there were only two (4%) weak positive reactions observed with the Shelanski method, whereas all 25 displayed strong or extremely positive reactions with the maximization method. Butylmethoxydibenzoylmethane displayed the most frequent elicitation reactions; the patch and photopatch tests displayed weak positive reactions in four (2%) and six (3%), and in one (4%) and two (8%), with the Shelanski and maximization tests, respectively. Taking into account two of the six reactors displayed positive reactions to petrolatum with the Shelanski test, the actual number of positive patch test reactions would be four (2%). The difference in results of the two methods was not statistically significant. CONCLUSION: Although it is not easy to conduct HRIPT on 200 subjects, and the results from the two tests were not significantly different, the reactions from the maximization tests were too severe to be recommended in humans.
G0 Phase ; Humans* ; Patch Tests* ; Petrolatum ; Photosensitivity Disorders ; Sunscreening Agents*

BACKGROUND: Flow cytometric measurement of DNA can reveal G0/G1, S, G2/M phases of cell cycle, and BrdU labeling can determine the percentage of cells in active DNA synthesis. A monoclonal antibody (MoAb), Ki-67, recognizes a protein that is present only in the nucleus of cycling cells but absent in resting cells. We analyzed whether the resting and the proliferating fraction could be differentiated by double staining with Ki-67 MoAb and propidium iodide (PI), and observed the effects of GM-CSF on cell cycle in acute myelogenous leukemia (AML) cells by Ki-67 MoAb. METHODS: Blast cells were prepared from 9 AML patients. The cells were incubated for 48 hours with or without GM-CSF. Cells were stained with BrdU/PI and Ki-67/PI. Cell cycle was analyzed by flow cytometry. RESULTS: The average fraction of G0/G1, S, and G2/M phases was 84.6%, 10.9%, and 4.5 % by BrdU/PI and 87.8%, 8.6%, and 3.7% by Ki-67/PI, respectively. Ki-67/PI staining dis-criminated between G0 and G1 phases and the average was 71.5% and 16.3%, respectively. In cells incubated with GM-CSF, BrdU/ PI method showed that the average S phase fraction (SPF) significantly increased from 10.9 to 16.2% (P=0.01) and the fraction of G0/G1 phase decreased from 84.6% to 78.4% (P= .02). Ki-67/PI method showed that the median SPF significantly increased from 8.6% to 13.7% (P=0.05) and G0 fraction decreased from 71.5% to 58.1% (P=0.02) but G1 fraction increased from 16.3% to 22.3% (P=0.01). CONCLUSION: Cell cycle analysis by Ki-67 MoAb and PI in AML is rapid and simple. It is especially useful to determine the growth fraction and G0 fraction compared to BrdU/PI staining.
Bromodeoxyuridine ; Cell Cycle* ; DNA ; Flow Cytometry ; G0 Phase ; G1 Phase ; Granulocyte-Macrophage Colony-Stimulating Factor ; Humans ; Ki-67 Antigen ; Leukemia, Myeloid, Acute* ; Propidium ; S Phase

BACKGROUND: Postpartum telogen effluvium refers to a phenomenon in which some hair in the growth phase progresses rapidly to the resting phase, which leads to excessive hair loss. This causes a high level of psychological stress. Therefore, an increasing number of women are seeking treatment for this condition. METHODS: The subjects of this study were postpartum women in the age range of 20 to 40 years who visited a university hospital between June 2015 and May 2016. Seven patients out of a total of 25 subjects were excluded, and their final follow-up visits were not performed because they found it difficult to return for the follow-up. After screening before delivery, the subjects were provided with hair care products. They visited the hospital 1 week, 1 month, and 3 months after giving birth. During each visit, the hair density and thickness were measured by photographing with a camera and using Folliscope® (Aram Huvis Corporation, Seoul, Korea). RESULTS: The hair thickness at the V-point improved from 0.089 µm at the baseline to 0.094 µm after using the shampoo for 3 months (P=0.028), and the hair density at the P-point increased significantly, from 75.24/cm² at the baseline to 81.33/cm² after using the shampoo for 3 months (P<0.001). CONCLUSIONS: In this study, a shampoo and a tonic in which the main material was horse placental growth factor combined with various materials, such as pumpkin extract, panthenol, and niacinamide, were clinically applied.
Alopecia ; Cucurbita ; Female ; Follow-Up Studies ; G0 Phase ; Hair* ; Horses ; Humans ; Mass Screening ; Niacinamide ; Parturition ; Postpartum Period* ; Seoul ; Stress, Psychological

BACKGROUND: Postpartum telogen effluvium refers to a phenomenon in which some hair in the growth phase progresses rapidly to the resting phase, which leads to excessive hair loss. This causes a high level of psychological stress. Therefore, an increasing number of women are seeking treatment for this condition. METHODS: The subjects of this study were postpartum women in the age range of 20 to 40 years who visited a university hospital between June 2015 and May 2016. Seven patients out of a total of 25 subjects were excluded, and their final follow-up visits were not performed because they found it difficult to return for the follow-up. After screening before delivery, the subjects were provided with hair care products. They visited the hospital 1 week, 1 month, and 3 months after giving birth. During each visit, the hair density and thickness were measured by photographing with a camera and using Folliscope® (Aram Huvis Corporation, Seoul, Korea). RESULTS: The hair thickness at the V-point improved from 0.089 µm at the baseline to 0.094 µm after using the shampoo for 3 months (P=0.028), and the hair density at the P-point increased significantly, from 75.24/cm² at the baseline to 81.33/cm² after using the shampoo for 3 months (P<0.001). CONCLUSIONS: In this study, a shampoo and a tonic in which the main material was horse placental growth factor combined with various materials, such as pumpkin extract, panthenol, and niacinamide, were clinically applied.
Alopecia ; Cucurbita ; Female ; Follow-Up Studies ; G0 Phase ; Hair* ; Horses ; Humans ; Mass Screening ; Niacinamide ; Parturition ; Postpartum Period* ; Seoul ; Stress, Psychological

BACKGROUND: There has been increasing interest in facial contouring procedures throughout Asian countries. As such, botulinum toxin A injections for masseteric hypertrophy have become a common procedure provided to patients who desire non-surgical correction of a square-angled mandible. We published a retrospective review of our initial results and our technique and treatment protocol in 2005. We also completed a long-term follow-up of the results (average follow-up period of 4.28 years) and the efficacy of repeated injections in 2010. The purpose of the current study is to systematically evaluate the changes to the masseter muscle at weekly intervals to determine the physiologic effects of botulinum toxin A injection. METHODS: Eight patients were prospectively followed on a weekly basis after botulinum toxin A injection for masseteric hypertrophy. Eight patients were followed for 15 weeks and four patients were followed for 25 weeks. Changes in the thickness of the muscle were recorded and analyzed. RESULTS: A reduction in the muscle thickness was found during the clenching phase of the muscle in the first week followed by a reduction in thickness during the resting phase in the second week. The reduction in muscle thickness continued until the eleventh week after which there was a gradual, but incomplete, return of muscle thickness over the study period. CONCLUSIONS: There is a predictable, phasic reduction in muscle thickness after botulinum toxin A injection for masseteric hypertrophy. This reduction first occurs during the clenching phase followed by a concomitant reduction during the resting phase. Maximal size reduction occurs at 11 weeks followed by gradual muscle size recovery.
Asian Continental Ancestry Group ; Botulinum Toxins* ; Botulinum Toxins, Type A* ; Clinical Protocols ; Follow-Up Studies ; G0 Phase ; Humans ; Hypertrophy* ; Mandible ; Masseter Muscle* ; Nerve Block ; Prospective Studies ; Retrospective Studies

BACKGROUND: Mesenchymal stem cells (MSC) can be defined by their extensive in vitro self renewal capacity and multi-lineage differentiation potentiality. These cells possess in vitro immunosuppressive properties that appear not to be major histocompatibility complex (MHC) restricted. This study evaluated the immune suppressive effect of mouse MSC on mixed lymphocyte reaction (MLR), and the mechanisms were investigated. METHODS: MSC were obtained from BALB/c bone marrow and cultured in low-glucose DMEM media. The expression of surface antigens and cell cycle were analyzed by flow cytometry. The MSC-induced suppression was assessed by MLR and transwell culture. RESULTS: The BALB/c MSC constitutively expressed MHC class I and CD54 (ICAM-1) antigens but were negative for MHC class II, CD40, CD80 (B7-1) and CD106 (VCAM-1) antigens. MSC suppressed allogeneic C57BL/6 T lymphocytes proliferation by adding them to MLR in which C3H spleen cells were used as a stimulator. This inhibition was dependent on the dose of BALB/c MSC but independent of MHC. C57BL/6 T lymphocytes proliferation was still inhibited when BALB/c MSC were added in culture 3 days after starting of MLR. When MSC were separated from C57BL/6 T cells by using the transwell membrane, the suppression of immune response wasn't observed, which suggested that the suppressive effect was dependent on cell-cell contact between BALB/c MSC and C57BL/6 T cells. When C57BL/6 T lymphocytes were cultured with MSC, the percentage of C57BL/6 T cells in G0 phase increased from 51.8+/-7.66% to 77.2+/-7.39% compared with the case that only C57BL/6 T cells were cultured. When the C57BL/6 T cells were cultured with C3H spleen cells, most of C57BL/6 T cells were in G2/M (96.38+/-3.33%). But by the addition of MSC to MLR, the percentage of T cells in G2/M decreased to 33.0+/-9.66% while that of T cells in G0 increased to 66.2+/-7.46%. CONCLUSIONS: We concluded that the cell cycle of responder T lymphocytes in MLR is arrested at G0 phase by MSC.
Animals ; Antigens, Surface ; Bone Marrow ; Cell Cycle ; Flow Cytometry ; G0 Phase ; Lymphocyte Culture Test, Mixed ; Lymphocytes* ; Major Histocompatibility Complex ; Membranes ; Mesenchymal Stromal Cells ; Mice* ; Spleen ; T-Lymphocytes