1.Effect of Transforming Growth Factor-beta1 on Expressions of Epidermal Growth Factor and Transforming Growth Factor-alpha in DU145 Androgen-Independent Prostate Cancer Cells.
Ki Yong SHIN ; Gu KONG ; Ho Seong CHOI ; Jong Jin LEE ; Tchun Yong LEE
Korean Journal of Urology 2001;42(1):40-46
PURPOSE: This study was designed to identify the possible mechanism of insensitivity of DU145 prostate cancer cells to the transforming growth factor (TGF)-beta1-mediated growth inhibition. MATERIALS AND METHODS: DU145 cells were treated with 4, 40, 100 pM TGF-beta1 for 3, 6, 9 days. Initially we performed the growth assay. After that, we analysed the change of cell cycle using fluorescence flow cytometry. At each time point, Western blot analysis with cell pellets was performed to investigate the change of expressions of epidermal growth factor(EGF), TGF-alpha, EGF receptor(EGFR) and TGF receptorII(TbetaR-II) proteins. RESULTS: The growth rate of TGF-beta1-treated cells was initially suppressed, but over time returned to control level. Flow cytometric analysis revealed that TGF-beta1-treated cells showed an increase in apoptotic/G1 phases, and concurrent decrease in S, G2/M phases until 6days. On day 9, however, TGF-beta1-treated cells showed a persistent increase of apoptotic unclei in spite of recovery of apoptotic/G1, S and G2/M phases. Western blot analysis showed that the intensity of EGF or TGF-alpha band decreased in dose-sependent manner on day 6. However, the intensity of each band increased up to the control level on day 9. the expression of EGFR or TbetaR-II protein did not change after treatment of TGF-beta1. CONCLUSIONS: these results suggest that EGF and TGF-alpha sould mediate in part the escape fron the inhibitory effect of TGF-beta1 in DU145 cells.
Blotting, Western
;
Cell Cycle
;
Epidermal Growth Factor*
;
Flow Cytometry
;
Fluorescence
;
Prostate*
;
Prostatic Neoplasms*
;
Transforming Growth Factor alpha
;
Transforming Growth Factor beta1
;
Transforming Growth Factors
;
United Nations
2.A Case of Malignant Lymphoma of the Orbital Margin.
Kwang Soo KIM ; Pyung Soon KWAK ; Seong Gu CHOI ; Ok Gi BAIK
Journal of the Korean Ophthalmological Society 1976;17(4):531-535
Secondary involvement of the eye and orbit occurs in about two to four percent of the patients with generalized lymphomatosis and/or other forms of lymphomatous tumors. Of the extranodal primary lesions which are more rare manifestation of the malignant lymphoma, only one percent occur in the eye and orbit. The malignant lymphoma of the orbit is consequently a relatively uncommon condition. The authors experienced a case of the malignantly mphoma of the orbital margin and treated by local radiation therapy with Co60, and the lesions regressed rapidly and completely disappeared. There has been no sign of recurrence at the orbital region, but we found that the malignant lymphomatous lesions involved in the pancreas and omentum by the surgical laparotomy. The patient died of poor course of the disease about 20 days after discharge.
Humans
;
Laparotomy
;
Lymphoma*
;
Omentum
;
Orbit*
;
Pancreas
;
Recurrence
3.Changes in the Nutritional Status of Children from North Korean Refugee Families Following Resettlement in South Korea
So-Yeong KIM ; Hyae-Min GU ; Seong-Woo CHOI
Journal of the Korean Society of Maternal and Child Health 2023;27(2):102-109
Purpose:
This study evaluated changes in growth and nutritional status using the first basic and the second repeated surveys on children from North Korean refugee families who settled in South Korea.
Methods:
A total of 337 children were included in the survey. Using a structured questionnaire, the data collected included sex, date of birth, country of birth, date of entry to South Korea, and birth parents’nationality. The prevalence of stunting, underweight, wasting, and obesity were evaluated using the 2017 Korean National Growth Chart for Children and Adolescents.
Results:
The prevalence of stunting decreased from 7.9% in the first survey to 6.9% in the second survey; that of underweight decreased from 6.0% to 4.7%; and that of wasting decreased from 6.3% to 3.5%; however, these changes were not statistically significant. The prevalence of obesity significantly increased from 8.0% to 13.2% in the first and second surveys, respectively (p=0.037). There was no significant difference in the prevalence of malnutrition according to the length of stay in South Korea or the children’s country of birth. However, the prevalence of obesity was significantly higher in children with longer lengths of stay and in those born in South Korea.
Conclusion
Although children from North Korean refugee families have settled in South Korea for a long time, the rate of malnutrition is still high, and the prevalence of obesity continuously increases.
4.Time Series Changes in Indices of Diabetes Management from the 2008-2022 Korea Community Health Survey
So Yeon RYU ; Seong Woo CHOI ; So Jung JEONG ; Hyae Min GU
Journal of Agricultural Medicine & Community Health 2024;49(3):179-193
Objectives:
This study aimed to determine the time-series changes in provincial diabetes management indices using by results of the 2008-2022 Korea Community Health Survey.
Methods:
We collected diabetes diagnosis experience rate, treatment rate for people diagnosed with diabetes, annual screening rate for diabetic eye disease complications, and annual screening rate for diabetic kidney disease complications with age-standardized rates from the Regional Health Statistics. The unit of analysis was the nation and 17 provinces and the time-series trend analysis was performed by joinpoint regression using the Joinpoint Regression Program, and the annual percent change (APC) and average APC (AAPC) were estimated, and statistical significance was tested using 95% confidence interval (CI).
Results:
From 2008-2022, the national AAPC (95% CI) for diabetes diagnosis experience rate steadily increased to 2.77 (2.25-3.27), increasing in all regions, excluding Sejong. The national AAPC for treatment rate for people diagnosed with diabetes was 0.75 (0.47-1.04), with a slight but steady trend toward improvement, excluding Daejeon, Sejong, and Jeonbuk, which showed significant improvement. The national AAPCs for annual screening rates for diabetic eye disease and kidney disease complications were 1.82 (0.99-2.66) and 1.95 (0.60-3. 41), respectively, and the area with the largest change was Sejong.
Conclusions
In Korea, the diabetes management indices tended to increase and improve, but the trends among provinces varied. Therefore, efforts are needed to address regional disparities in diabetes management.
5.Time Series Changes in Indices of Diabetes Management from the 2008-2022 Korea Community Health Survey
So Yeon RYU ; Seong Woo CHOI ; So Jung JEONG ; Hyae Min GU
Journal of Agricultural Medicine & Community Health 2024;49(3):179-193
Objectives:
This study aimed to determine the time-series changes in provincial diabetes management indices using by results of the 2008-2022 Korea Community Health Survey.
Methods:
We collected diabetes diagnosis experience rate, treatment rate for people diagnosed with diabetes, annual screening rate for diabetic eye disease complications, and annual screening rate for diabetic kidney disease complications with age-standardized rates from the Regional Health Statistics. The unit of analysis was the nation and 17 provinces and the time-series trend analysis was performed by joinpoint regression using the Joinpoint Regression Program, and the annual percent change (APC) and average APC (AAPC) were estimated, and statistical significance was tested using 95% confidence interval (CI).
Results:
From 2008-2022, the national AAPC (95% CI) for diabetes diagnosis experience rate steadily increased to 2.77 (2.25-3.27), increasing in all regions, excluding Sejong. The national AAPC for treatment rate for people diagnosed with diabetes was 0.75 (0.47-1.04), with a slight but steady trend toward improvement, excluding Daejeon, Sejong, and Jeonbuk, which showed significant improvement. The national AAPCs for annual screening rates for diabetic eye disease and kidney disease complications were 1.82 (0.99-2.66) and 1.95 (0.60-3. 41), respectively, and the area with the largest change was Sejong.
Conclusions
In Korea, the diabetes management indices tended to increase and improve, but the trends among provinces varied. Therefore, efforts are needed to address regional disparities in diabetes management.
6.Time Series Changes in Indices of Diabetes Management from the 2008-2022 Korea Community Health Survey
So Yeon RYU ; Seong Woo CHOI ; So Jung JEONG ; Hyae Min GU
Journal of Agricultural Medicine & Community Health 2024;49(3):179-193
Objectives:
This study aimed to determine the time-series changes in provincial diabetes management indices using by results of the 2008-2022 Korea Community Health Survey.
Methods:
We collected diabetes diagnosis experience rate, treatment rate for people diagnosed with diabetes, annual screening rate for diabetic eye disease complications, and annual screening rate for diabetic kidney disease complications with age-standardized rates from the Regional Health Statistics. The unit of analysis was the nation and 17 provinces and the time-series trend analysis was performed by joinpoint regression using the Joinpoint Regression Program, and the annual percent change (APC) and average APC (AAPC) were estimated, and statistical significance was tested using 95% confidence interval (CI).
Results:
From 2008-2022, the national AAPC (95% CI) for diabetes diagnosis experience rate steadily increased to 2.77 (2.25-3.27), increasing in all regions, excluding Sejong. The national AAPC for treatment rate for people diagnosed with diabetes was 0.75 (0.47-1.04), with a slight but steady trend toward improvement, excluding Daejeon, Sejong, and Jeonbuk, which showed significant improvement. The national AAPCs for annual screening rates for diabetic eye disease and kidney disease complications were 1.82 (0.99-2.66) and 1.95 (0.60-3. 41), respectively, and the area with the largest change was Sejong.
Conclusions
In Korea, the diabetes management indices tended to increase and improve, but the trends among provinces varied. Therefore, efforts are needed to address regional disparities in diabetes management.
7.Microsatellite Instability and Its Clinicopathologic Significance in Korean Gastric Cancer Patients.
Tae Sung SOHN ; Kwang Soo LEE ; Seong Ho CHOI ; Yong Il KIM ; Youl Hee CHO ; Gu KONG
Journal of the Korean Surgical Society 1999;56(4):539-547
BACKGROUND: Genomic instability has been reported as a novel mechanism of tumorigenesis. Microsatellites are short tandemly repeated nucleotide sequences throughout the human genome. Widespread somatic mutations in these sequences due to the loss or gain of one or more repeated units are termed as microsatellite instabilites (MI). MI have been found to be the result of numerous replication errors due to mutations in mismatched repair genes. Recently, MI have been recognized as the causes of the increased mutation rates of cancer cells. An elevated mutation rate manifested by MI may also affect various genes that are essential for normal cell function and growth, thus contributing to tumor initiation, promotion, and progression. We investigated the frequency of MI in a series of 44 gastric carcinomas in an attempt to clarify the role of these genetic alterations in gastric carcinogenesis and to see whether the cases with MI displayed any clinical significance and morphologic features and/or whether they showed distinctive relations with any clinicopathologic characteristics. METHODS: We analyzed 44 gastric carcinomas and paired samples from non-neoplastic mucosa of Korean patients who had undergone a gastrectomy. The samples were immediately frozen in liquid nitrogen and stored at 70oC until use. High molecular weight DNAs were isolated by standard methods only from cases whose were composed of more than 50% tumor cells. Ten loci of microsatellites were used in this study: D3S1766, D3S1339, D3S1029, D9S162, D9S171, INF-a, D11S925, D11S1818, D11S35, and D11S1284. The MI analysis was performed by Polymerace Chein Reaction (PCR) with 33P-labelled primers. PCR products were separated on 6% polyacrylamide gel containing 7M urea, and autoradiographed. H-E stained sections were used to review the pathologic features. The relationships between MI incidence and clinicopathologic findings were statistically tested. RESULT: Analysis of the 44 cases at the 10 loci of microsatellites allowed us to identify 19 instabilities (43%): 15 cases at 1 locus, 2 cases at 2 loci, and 2 cases at multiple loci. The incidence of MI was remarkably increased in cases with poor differentiation and node metastasis (p=0.067 and p=0.007, respectively). Comparing the histologic type (diffuse vs. intestinal type), the diffuse type of carcinoma had a higher incidence; however, there was no statistical significance (55% vs. 33%, p=0.108). There was no significant correlation between MI and other prognostic variables including location, tumor size, and distant metastasis. CONCLUSIONS: These results confirm that the mutator phenotype plays in a certain role gastric carcinogenesis. The gastric cancers with MI were correlated with the worse prognostic variables of poor differentiation and node metastasis, suggesting that MI appear to be useful as possible indicators of the worst prognosis and represent important genetic alterations associated with tumor progression in gastric carcinogenesis.
Base Sequence
;
Carcinogenesis
;
DNA
;
Gastrectomy
;
Genome, Human
;
Genomic Instability
;
Humans
;
Incidence
;
Microsatellite Instability*
;
Microsatellite Repeats*
;
Molecular Weight
;
Mucous Membrane
;
Mutation Rate
;
Neoplasm Metastasis
;
Nitrogen
;
Phenotype
;
Polymerase Chain Reaction
;
Prognosis
;
Stomach Neoplasms*
;
Urea
8.Prognostic Factors in Spontaneous Cerebellar Hemorhage and Pontine Hemorrhage.
Il Kwon GU ; Soo Ho CHO ; Seong Ho KIM ; Jang Ho BAE ; Oh Lyong KIM ; Byung Yearn CHOI
Journal of Korean Neurosurgical Society 1996;25(12):2398-2404
The author studied 62 consecutive patients with spontaneous cerebellar hemorrhage and 38 patients with spontaneous pontine hemorrhage, diagnosed by computerized tomography scanning from May 1983 to December 1994 and assessed the relationship of outcome of initial GCS score, CT findings, and treatment modality. In cerebellar hemorrhage, good outcome was achieved in patients with high initial GCS score(>13), small hematoma, patent quadrigeminal cistern, absent hydroceohalic change, and the location of the hemorrhage in the hemisphere. Although the size of hematoma was an impotant prognostic factor, it had no constant bearing on the level of consciousness, degree of quadrigeminal cistern obliteration, and outcome. Absence of quadrigeminal cistern obliteration predicted a good outcome whether the hematoma was evacuated or not, as long as obstructive hydrocephalus, if present, was relieved darly. However, partial obliteration of the quadrigeminal cistern was a predictor of good outcome if the hematoma was evacuate d within 48 hours after the onset of hemorrhage. Total obliteration of the quadrigeminal cistern inevitably predicted an unfavorable outcome. In pontine hemorrhages, a good outcome was achieved in patients with high initial GCS score(>13), small size hematoma(<5cc) and patent quadrigeminal cistern. Especially, the size of the hematoma was an important prognostic factor and guideline for the determination of surgical candidates. Small hematomas(<5cc) responded more positively to conservative management than to surgery. However, early hematoma evaculation(<48hr) had improved the outcome in moderate sized hematomas(5-10cc). Large hematomas(>10cc) inevitably showed an unfavorable outcome.
Consciousness
;
Hematoma
;
Hemorrhage*
;
Humans
;
Hydrocephalus
9.Pelviscopic Gonadectomy in two cases of Complete Androgen Insensitivity Syndrome.
Seong Jae RHEE ; Hyun Jin GU ; Kyung An HAN ; Jeong Gyu SHIN ; Won Jun CHOI ; Soon Ae LEE ; Jong Hak LEE ; Won Young PAIK
Korean Journal of Obstetrics and Gynecology 1999;42(10):2396-2401
Androgen insensitivity syndrome is a genetic syndrome characterized by complete or partial resistance of end organs to the peripheral effect of androgen. The phenotype of this condition is female, despite the normal male karyotype 46,XY. This is the third most common cause of primary amenorrhea after gonadal dysgenesis and mullerian agenesis. There is a congenital insensitivity to androgens, transmitted by means of a maternal X-linked recessive gene responsible for the androgen intracellular receptor. Prophylactic gonadectomy in usually performed due to increased risk for development of malignancy and possible virilization. Pelviscopy provides a minimally invasive technique for the accurate diagnosis and also provides the opportunity for therapeutic management of these patients. Recently we experienced two cases of this syndrome and removed the gonad by pelviscopic surgery, so we presented them with brief review of literature.
Amenorrhea
;
Androgen-Insensitivity Syndrome*
;
Androgens
;
Diagnosis
;
Female
;
Genes, Recessive
;
Gonadal Dysgenesis
;
Gonads
;
Humans
;
Karyotype
;
Male
;
Phenotype
;
Virilism
10.Coil Embolization of Ruptured Thrombosed Distal Superior Cerebellar Artery Aneurysm: A Case Report.
Min Cheol KANG ; Kil Sung CHAE ; Seong Jin NOH ; Hak Gi CHOI ; Chang Gu GHANG
Journal of Cerebrovascular and Endovascular Neurosurgery 2012;14(3):243-246
Distal thrombosed aneurysm of the superior cerebellar artery (SCA) is extremely rare and is often associated with cerebellar infarction or subarachnoid hemorrhage. We report herein on a case involving a patient with a ruptured thrombosed distal SCA aneurysm which was treated successfully through the endovascular approach.
Aneurysm
;
Arteries
;
Humans
;
Infarction
;
Subarachnoid Hemorrhage