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이진탁,천현우,Thu-Huyen Pham,윤재환,이지연,최명권,류형원,오세량,오재욱,윤도영 한국미생물·생명공학회 2020 Journal of microbiology and biotechnology Vol.30 No.2
A novel compound named ‘kanakugiol’ was recently isolated from Lindera erythrocarpa and showed free radical-scavenging and antifungal activities. However, the details of the anticancer effect of kanakugiol on breast cancer cells remain unclear. We investigated the effect of kanakugiol on the growth of MCF-7 human breast cancer cells. Kanakugiol affected cell cycle progression, and decreased cell viability in MCF-7 cells in a dose-dependent manner. It also enhanced PARP cleavage (50 kDa), whereas DNA laddering was not induced. FACS analysis with annexin V-FITC/PI staining showed necrosis induction in kanakugiol-treated cells. Caspase-9 cleavage was also induced. Expression of death receptors was not altered. However, Bcl-2 expression was suppressed, and mitochondrial membrane potential collapsed, indicating limited apoptosis induction by kanakugiol. Immunofluorescence analysis using α- tubulin staining revealed mitotic exit without cytokinesis (4N cells with two nuclei) due to kanakugiol treatment, suggesting that mitotic catastrophe may have been induced via microtubule destabilization. Furthermore, cell cycle analysis results also indicated mitotic catastrophe after cell cycle arrest in MCF-7 cells due to kanakugiol treatment. These findings suggest that kanakugiol inhibits cell proliferation and promotes cell death by inducing mitotic catastrophe after cell cycle arrest. Thus, kanakugiol shows potential for use as a drug in the treatment of human breast cancer.
이진탁(Jin Tack Lee),이창우(Chang Woo Lee),김재홍(Jae Hong Kim),김중환(Joong Hwan Kim) 대한피부과학회 1987 대한피부과학회지 Vol.25 No.2
We describe herein four cases of childhood dermatomysitis of Brunsting type. The ages of these patients were between 7 to 10 years at the time of the disease. All four patients had pathognomOnic cutaneous changes, such as heliotrope erythema and Gottron's papules, which are not seen frequently in adult type dermatomyositis. These patients did not show any marked serologic abnormalities suggestive of having other connective tissue diseases or autoimmune diseases. All patients were initially treated with prednisolone and chloroquine, and have been under control with low dose prednisolone, or chloroquine alone.
이진탁(Jin Tack Lee),소순남(Soon Nam So),김중환(Joong Hwan Kim),김재홍(Jae Hong Kim) 대한피부과학회 1988 大韓皮膚科學會誌 Vol.26 No.3
Ceftriaxone is a new semi-synthetic, broad spectrum third generation cephalosporin. It has a high degree of stability in the presence of beta-lactamase and its half-life averages about 8 hours. A total of 109 patients with uncomplicated gonococcal urethritis seen at the VD Clinic, Choong-Ku Public Health Center, in Seoul in the periods of March April 1986, and April-May 1987, were subjected to this study. The diagnosis of gonococcal infection and the test. of cure were made on the basis of culture and Gram staining of urethral smear. The patients were divided randomly into two groups consisting of 49 and 60, and treated with ceftriaxone, 250mg, IM and 500mg, IM respectively. No failure case was seen in both groups. lt is suggested that ceftriaxone, 250mg, IM regimen may be used as the first line treatment for uncomplicated gonococcal urethritis.