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유방암에서 p53 단백 과발현과 기존의 예후인자들과의 상관성에 관한 연구
전훈배,구범환 고려대학교 의과대학 1995 고려대 의대 잡지 Vol.32 No.1
Reliable prognostic markers are meeded in treast cancer management to help clinicians identify the patients with the high risk of recurence and arrive at more rational decisions for treatment. The nuclear phosphoprotein p53 is faintly esxpressed in all normal cells and appears to function in suppressive regulation of cell cycle. Abnormally high levels of p53 protein are found in many different tyupes of cancer. To evaluate prognostic significance of p53 mutation, the author analyzed the association between nuclear overexpression of p53 protein on immunohistochemical stain of archival paraffin embedded tissue and following established prognostic parameters of 49 breast cancer patients operated between september 1987 and August 1991 in Korea University Hospital: Tumor size, axillary node involvement, menopausal status, estrogen receptor status, progesterone receptor status. DNA ploidy, and histological grade. Imrnunohistochemical stain of p53 protein was also perfomed on ten cases of fibroadenoma for negative control. Twenty four(49%) cases showed overexpression of p53 protein in immunohistohemical stain of archival paraffin embedded tissue and following established prognostic parameters of 49 breast cancer patients operated between september 1987 and August 1991 in Korea University Hospital: tumor size, axillary node involvement, menopausal status, estrogen receptor status, progesterone receptor status, DNA ploidy, and histological grade, Immunohistochemical stain of p53 protein was also perfomed on ten cases of fibroadenoma for negative control. Twenty four(49%) cases showed overexpression of p53 protein in immune-histochemical staining using two murine anitihuman p53 protein monoclonal antibodies(NCL-P53-DO7&NCL-p53-240, Novocastra Lab., U.K.). Although associations were found between p53 overexpression and large tumor size, negativity of estrogen receptor, and negativity of progesterone receptor, a high statistical significance was found only between p53 overexpression and negativity of estrogen receptor (P<0.01). In 47 cases which had been followed up for more than 36 months(median 50 months), the overall survival showed no statistically significant difference between two groups of patients with of without p53 overexpression. But the p53 overexpression was found to be significantly associated with the shorter relapse-free survival of patient (P<0.02). When combined with estrogen receptor status, the overexpression of p53 protein may have a more significant role in prediction of prognosis. At a result of this study, it is concluded that the p53 gene mutation can be considered as a useful prognostic marker for breast cancer patients, and more aggressive therapeutic approach is warranted to such group of patiens with p53 gene mutation.
유방암에서 PCR을 이용한 p53 유전자의 Codon 175에서의 점돌연변이에 관한 연구
김영철,김종석,김선한,목영재,최상용,문홍영,구범환 고려대학교 의과대학 1993 고려대 의대 잡지 Vol.30 No.2
The p53 gene, which is located in the short arm of chromosome 17, has been a constant source of fascination since its discovery at 1979. Allelic deletion coupled with mutation of the remaining allele is a theoretical hallmark of functional inactivation of tumor suppressor gene, and mutation and/or deletion of p53 gene is to be the most frequently observed genetic changes in breast cancer related to a single gene. In the present report, we have attempted to determine a point mutation at codon 175 which is known as one of four hot spots within highly conserved regions of the p53 gene where almost all of the reported mutations cluster A 304-bp fragment of exon 5 of p53 gene in fresh tissue of breast carcinoma was amplified by polymerase chain reaction (PCR), digested with Hha I restriction endonuclease, and electrophoresed. A point mutation was studied by observation of polymorphism with ethidium bromide staining under ultraviolet transillumination. The result revealed all of 14 carcinomas had wild-type p53 gene.
Kim, Kyung-Bum,Jang, Wooree,Cho, Jae Yong,Woo, Sang Bum,Jeon, Deok Hwan,Ahn, Jung Hwan,Hong, Seong Do,Koo, Hye Young,Sung, Tae Hyun Elsevier 2018 Nano energy Vol.54 No.-
<P><B>Abstract</B></P> <P>For the development and application of wearable electronics, a transparent and flexible piezoelectric sensor (TFPS) system is an important component considering the physical motion energy of the human body. This work newly proposes a transparent and biocompatible boron nitride nanosheet (BNNS) material with a TFPS device. The TFPS device is based on BNNS as a piezoelectric active component and PDMS as a flexible element. The device is able to generate electrical energy from mechanical push force and human movement; it has an output voltage of 22 V, output current of 75 nA, output power of 40 µW (power density: 106 μW/cm<SUP>3</SUP>), and energy conversion efficiency of 12.6%. In addition, the TFPS device based on BNNS (1.0 wt%) is proposed as a significant step toward devices which are self-powered by the biomechanical movement of the human foot, neck, wrist, and knee, converted into electric energy in various signal forms. It will be deployed as a body-movement sensor.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The TFPS device is based on BNNS as a piezoelectric active component. </LI> <LI> The TFPS is a transparent and flexible piezoelectric sensor system. </LI> <LI> It has an output voltage of 22 V, output current of 75 nA, output power of 40 µW. </LI> <LI> The device is able to generate electrical energy from mechanical push force and human movement. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
丘範煥,睦敦相 고려대학교 의과대학 1975 고려대 의대 잡지 Vol.12 No.1
After end-to-side, side-to-side and H-graft portacaval shunts in 9 dogs, the author observed hematologic values, liver function tests, the changes of portal and inferior vena caval pressures and hepatoscan findings. Histopathological findings of anastomotic stoma, liver and spleen were also included. The results are as follows: 1. In hematologic findings, R.B.C. and hematocrit were slightly increased in side-to-side shunt group than other 2 groups. And W.B.C. increased moderately in all groups. 2. In liver function tests, increased serum transaminase activity in side-to-side shunt group, increased serum globulin and reversed A/G ratio in H-type portacaval shunt group were observed. 3. postoperatively portal pressures were decreased moderately, and inferior vena caval pressures were decreased slightly in all groups. 4. The shunt stomata were stenosed partially due to fibrosis and foreign body granuloma, and more so in H-type shunt group. Histopathological changes of the liver and spleen mainly consisted of the degeneration of hepatic cells and disarray of hepatic cell cords in liver, and sinusoidal congestion, hemorrhage and white pulp atrophy in spleen. More marked changes were seen in H-type shunt group than other 2 groups. 5. In hepatoscan findings, enlargement, mottling and scattering of the liver were the alterations observed. More marked alterations were seen in H-type shunt group.
조환석,배상수,손호영,윤건호,강성구,김기범,최윤희,차봉연,강지호,추영미 대한내분비학회 1998 Endocrinology and metabolism Vol.13 No.3
The Alstrom syndrome is inherited autosomal recessive disorder, characterized by obesity, diabetes mellitus, pigmentary retinal degeneration, normal intelligence, sensorineural hearing loss, baldness, acanthosis nigricans, male hypogonadism, hyperuricemia and hypertriglyceridemia. There is no reported case of Alstrom syndrome in Korea yet. We experienced a 29-year-old female patient with clinical characteristics similar to Alstrom syndrome who was admitted due to poorly controlled diabetes mellitus and diabetic retinopathy with hemorrhage. We report this case with the review of literatures (J Kor Soc Endocrinol 13:501-508, 1998).