Journal of Yeungnam Medical Science

Jae Ryong Kim

13 Articles

Can we rejuvenate? Implications of biological aging research: Youlim Son, Jae Ryong Kim; Yeungnam Univ J Med. 2017;34(1):1-10. Published online June 30, 2017; DOI: https://doi.org/10.12701/yujm.2017.34.1.1

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Abstract PDF: The life history of man is summarized as a birth-aging-disease-death. Man eventually ages and dies. How long can humans live? What is aging? Why do we age? Is aging inevitable? Can we rejuvenate? Recent researches on biological aging suggest that humans might overcome aging and rejuvenate. In this paper, we review the biologic characteristics of aging and the latest results of biological aging research, implicating that aging can be controlled, further treated, and that humans can ultimately be rejuvenated.

Spinal Fusion Based on Ex Vivo Gene Therapy Using Recombinant Human BMP Adenoviruses.: Gi Beom Kim, Jae Ryong Kim, Myun Hwan Ahn, Jae Sung Seo; Yeungnam Univ J Med. 2007;24(2):262-274. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2.262

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Abstract PDF: PURPOSE: Bone morphogenetic proteins (BMPs) play an important role in the formation of cartilage and bone, as well as regulating the growth of chondroblasts and osteoblasts. In this study, we investigated whether recombinant human BMP adenoviruses are available for ex vivo gene therapy, using human fibroblasts and human bone marrow stromal cells in an animal spinal fusion model. MATERIALS AND METHODS: Human fibroblasts and human bone marrow stromal cells were transduced with recombinant BMP-2 adenovirus (AdBMP-2) or recombinant BMP-7 adenovirus (AdBMP-7), referred to as AdBMP-7/BMSC, AdBMP-2/BMSC, AdBMP-7/HuFb, and AdBMP-2/HuFb. We showed that each cell secreted active BMPs by alkaline phosphatase staining. Since AdBMP-2 or AdBMP-7 tranducing cells were injected into the paravertebral muscle of athymic nude mice, at 4 weeks and 7 weeks, we confirmed that new bone formation occurred by induction of spinal fusion on radiographs and histochemical staining. RESULTS: In the region where the AdBMP-7/BMSC was injected, new bone formation was observed in all cases and spinal fusion was induced in two of these. AdBMP-2/BMSC induced bone formation and spinal fusion occurred among one of five. However, in the region where AdBMP/HuFb was injected, neither bone formation nor spinal fusion was observed. CONCLUSION: The osteoinductivity of AdBMP-7 was superior to that of AdBMP-2. In addition, the human bone marrow stromal cells were more efficient than the human fibroblasts for bone formation and spinal fusion. Therefore, the results of this study suggest that AdBMP-7/ BMSC would be the most useful approach to ex vivo gene therapy for an animal spinal fusion model.

Association Analyses of beta3AR Trp64Arg and UCP-2 -866G/A Polymorphisms with Body Mass Index in Korean.: Hong Soo Jung, Joo Hyun Lee, Jun Sakong, Sung Wook Bae, Jung Hye Kim, Jae Ryong Kim; Yeungnam Univ J Med. 2007;24(2):252-261. Published online December 31, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.2.252

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BACKGROUND
Obesity is the most common nutritional disorder in Western society as well as in Korea. Obesity results from a combination of genetic, environmental, and behavioral factors. MATERIALS AND METHODS: In an attempt to investigate the association of obesity with its candidate genes, beta3 adrenergic receptor (beta3AR) and uncoupling protein 2 (UCP2), we analyzed polymorphisms of beta3AR Trp64Arg and UCP2 -866G/A by PCR-RFLP analysis and the obesity-related phenotypes, including body mass index (BMI), fasting glucose concentration, and plasma lipid profiles in 750 subjects. RESULTS: The Trp64Arg polymorphism in the beta3AR gene was not statistically associated with the BMI. The UCP2 -866G/A polymorphism was significantly higher in obese than in non-obese subjects (P<0.05). However, the UCP2 -866A/A polymorphism was higher in the non-obese subjects. CONCLUSION: These results suggest that the UCP2 -866G/A polymorphism might be more useful for the prediction of obesity and obesity-associated diseases in Korean patients than the beta3AR Trp64Arg polymorphism.

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Clinical Course of Bipolar Disorder in Children and Adolescents
Na-Ri Kang, Young-Sook Kwack
Journal of korean Academy of Child and Adolescent Psychiatry.2012; 23(1): 3. CrossRef

Identification of Interleukin 1-Responsive Genes in Human Chondrosarcoma SW1354 cells by cDNA Microarray Technology.: Jun Ha Jeon, Yong Wook Jung, Dae Young Yun, Hyun Do Kim, Chang Mo Kwon, Young Hoon Hong, Jae Ryong Kim, Choong Ki Lee; Yeungnam Univ J Med. 2007;24(1):24-40. Published online June 30, 2007; DOI: https://doi.org/10.12701/yujm.2007.24.1.24

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Abstract PDF: BACKGROUND
Accumulating evidence shows that interleukin(IL)-1 plays a critical role in inflammation and connective tissue destruction observed in both osteoarthritis and rheumatoid arthritis. IL-1 induces gene expression related to cytokines, chemokines and matrix metalloproteinases by activation of many different transcription factors. MATERIALS AND METHODS: The chondrosarcoma cell line, SW1353, is known to be a valuable in vitro system for investigating catabolic gene regulation by IL-1beta in chondrocytic cells. To explore and analyze the changes in gene expression by IL-1 responsible for arthritis, SW1353 was treated with IL-1 for 1, 6 and 24 h and then total RNAs were purified for each time. The changes in gene expression were analyzed with 17k human cDNA microarrays and validated by semi-quantitative RT-PCR. RESULTS: Greater than a two-fold change was observed in 1,200 genes including metallothioneins, matrix metalloproteinases, extracellular matrix proteins, antioxidant proteins, cytoskeleton proteins, cell cycle regulatory proteins, proteins for cell growth and apoptosis, signaling proteins and transcription factors. These changes appeared to be correlate with the pathophysiological changes observed in early osteoarthritis. CONCLUSION: cDNA microarray analysis revealed a marked variability in gene expression, and provided insight into the overall molecular changes. The result of this study provide initial information for further studies to identify therapeutic targets in osteoarthritis pathogenesis.

Profile of Gene Expression Changes During Doxorubicin Induced Apoptosis of Saos-2.: Jeong Sook Lim, Min Jae Bae, Suk Hwan Baek, Jae Ryong Kim, Jung Hye Kim, Seong Yong Kim; Yeungnam Univ J Med. 2005;22(2):221-240. Published online December 31, 2005; DOI: https://doi.org/10.12701/yujm.2005.22.2.221

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Abstract PDF: BACKGROUND
Doxorubicin has proved to be a useful chemotherapeutic agent especially for osteogenic sarcoma. It induces cancer cell death via apoptosis. MATERIALS AND METHODS: To explore and analyze the changes of gene expression during doxorubicin induced apoptosis on human osteogenic sarcoma, Saos-2 cell, cDNA microarray was performed. After treatment with doxorubicin, total RNA was purified and expressed genes were investigated with a 17k human cDNA microarray. RESULTS: For analysis of the cDNA microarray, the genes were filtered using the sum of the median value of Cy3 and Cy5 signal intensity of greater than 800. Expression of 264 genes was changed by more than 2 fold, and the expression of 35 genes was changed more than 3 fold after treatment with doxorubicin. The genes were primarily related to cell death, cell growth and maintenance, signal transduction, cellular component, transport, and metabolism. CONCLUSION: Treatment with doxorubicin induced expressional change of many genes. Some of the genes might be related with apoptosis directly or indirectly. Further study is now needed to characterize these genes.

Bone Formation by rhBMP-7 Transduced HEK 293 Cells in Nude Mouse.: Su Yon Jeong, Won Tae Chang, Yon Sil Chang, Myun Hwan Ahn, Jae Ryong Kim, In Hwan Song; Yeungnam Univ J Med. 2003;20(2):142-151. Published online December 31, 2003; DOI: https://doi.org/10.12701/yujm.2003.20.2.142

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Abstract PDF: To induce bone formation at ectopic site by tissue engineering and gene therapy, we transplanted collagen sponges containing rhBMP-7 transduced HEK 293 cells in the hypodermis of nude mice. Bone formation was investigated by histological and electron microscopic method at 3, 6, and 9 weeks after transplantation. At 9 weeks after transplantation, eosinophilic bony tissue was observed in the implanted collagen sponge and was confirmed as bone tissue by Von Kossa stain. In the transmission electron microscopic observation, the cells in newly formed bone tissue had eccentrically located nucleus and well developed rough endoplasmic reticulum (rER). Therefore, the cells were evaluated as osteoblasts. Those results suggest that it is possible to form a bone tissue in the ectopic site by transplantation of rhBMP-7 transduced HEK 293 cells. This will be contributed to push more advanced gene therapy for bone formation. However, the HEK 293 cell is unable to apply to the clinical gene therapy. Therefore it is worth to find more compatible cells for clinical application. In addition, collagen sponge is considered as an excellent scaffold and/or carrier for gene therapy and a good biomaterial for tissue engineering.

Gene Expression of Enzymes Related to Glutathione Metabolism in Anticancer Drug-resistant L1210 Sublines: Seong Yong Kim, Jae Ryong Kim, Jung Hye Kim; Yeungnam Univ J Med. 1995;12(1):32-47. Published online June 30, 1995; DOI: https://doi.org/10.12701/yujm.1995.12.1.32

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Abstract PDF: Glutathione(GSH) has a very important role in detoxification of cells and is closely related to antitumor drug-resistance of cancer cells. In order to evaluate the importance of glutathione metabolism in the drug-resistant cancer cells, the concentration of celluar GSH and activities of y-glutamylcysteine synthetase(GCS), y-glutamyl transpeptidase (GGT) and glutathione S-transferases(GST) in the adriamycin, vincristine, or cisplatin resistant L1210 (L1210AdR; L1210VcR, or L12100s) sublines were measured. Expression and amplification of GCS, GGT, and GST-i7 genes were also observed in the parent L1210 and the drug-resistant L1210 sublines. The concentration of GSH was increased 5.34 fold in L12100s, 2.83 fold in L1210VcR, and 1.78 fo-d in L1210AdR, compared to L1210. The activities of GCS and GGT were -increased in drug-resistant L1210 sublines. The GST activity was increased in L1210VcR and L1210Cis but decreased in L1210AdR compared to L1210. Expression of GCS, GGT, and GST-rr genes were increased in the resistant L1210 sublines compare to the parent L1210 in northern blot analyses. Overexpression of GCS, GGT, and GST-77 were observed in the resistant sublines, and the increases of the concentration of glutathione and the activities of GCS and GGT in the resistant sublines may be involved in a part of the drug-resistance in the resistant sublines.

The Change of Glutathione Metabolism in Liver and Kidney of Cisplatin treated Rats.: Seong Yong Kim, Jae Yong Chung, Jae Ryong Kim, Jung Hye Kim; Yeungnam Univ J Med. 1994;11(2):262-269. Published online December 31, 1994; DOI: https://doi.org/10.12701/yujm.1994.11.2.262

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Abstract PDF: Glutathione (GSH) is a well-known antioxidative cellular component which is ubiquitous in nature. Several enzymes involved in GSH metabolism and recycling have been found to play important roles in detoxification of xenobiotics and free radicals. In this study, total GSH content, activity of GSH peroxidase and GSH reductase were measured in liver and kidney of cisplatin treated rats. Total GSH content (mM/g protein) of liver was higher in cisplatin treated rats (1.51±0.28) than of nontreated control (0.95±0.28), and in kidney, it was also higher in cisplatin treated rats (0.87±0.20) than that of control (0.68±0.14). The activity of GSH peroxidase (µM/mg protein/min) was lower in liver of cisplatin treated rats (348.0±18.54) than that of control (415.5±53.15), in kidney it was increase din cisplatin treated rats (380.5±51.86) compared to control (327.3±20.36). The activity of GSH reductase (µM/mg protein/min) was higher in liver of cisplatin treated rats (3.09±0.88) than that of control (2.28±0.61), in kidney it was also higher in cisplatin treated rats (8.50±2.62) than that of control (3.30±1.10). In summary, detoxification of ciplatin was revealed lesser effect in kidney as show increasion of GSH peroxidase and reductase and detoxification of cisplatin was expressed effectively in liver by increasing of GSH content and decreasing GSH peroxidase.

Membrane protein alterations associated with anticancer drug resistance in mouse lymphoblastic leukemia L1210 cells: Seong Yong Kim, Sung Kweon Son, Jae Ryong Kim, Jung Hye Kim; Yeungnam Univ J Med. 1993;10(2):432-444. Published online December 31, 1993; DOI: https://doi.org/10.12701/yujm.1993.10.2.432

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Multidrug resistance (MDR) phenotype is frequently observed in animal and human cancer cell lines selected for in vitro resistance to a single chemotherapeutic agent. It is characterized by the diminished j drug accumulation and is related to the drug efflux mechanism in resistant cells. In the present study, adriamycin resistant cells (L1210-AdR6: 10-6M adriamycin, -AdR5: 10-5M) and vincristine resistant cells (L1210-VcR7: 10-7M vincristine, -VcR6: 10-6M) were produced from mouse lymphoblastic leukemia cell line L1210. Growth profiles of survived cells were observed for 5 days with MTT (thiazolyl blue) assay and resistance was compared with IC50 (drug concentration of 50% survival reduction in absorbance). Resistant cells proliferated more slowly than sensitive cell. Doubling times were 29.7hr in L1210, 68.7 hr in L1210-AdR5 and 58.2 hr in -VcR6. MDRs expressed as resistance factor were as follows, L1210-AdR5 was 76.4 times for vincristine, L1210-VcR6 was 96.4 times for adriamycin. The cell membrane proteins with three different M.W. were recognized to be related resistance, 220, 158, and 88 Kd in L1210-AdR5, 158, 140 and 88 Kd in L1210-VcR6 by SDS-PAG electrophoresis. Cell surface membrane proteins were identified by radio-iodination and autoradiogram. Their molecular weights were 158, 72.8, and 42.4 Kd in L1210-VcR6.

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Suppression of P-glycoprotein expression by antipsychotics trifluoperazine in adriamycin-resistant L1210 mouse leukemia cells
Soon Young Shin, Byeong Hyeok Choi, Jae-Ryong Kim, Jung-Hye Kim, Young Han Lee
European Journal of Pharmaceutical Sciences.2006; 28(4): 300. CrossRef

Study for Metabolism of Resistant Production in Anticancer drug Resistant Stomach Cancer Cell SNU-1.: Jung Hye Kim, Mi Wha Kang, Jae Ryong Kim; Yeungnam Univ J Med. 1989;6(2):195-205. Published online December 31, 1989; DOI: https://doi.org/10.12701/yujm.1989.6.2.195

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Abstract PDF: Development of drug resistance in tumors during treatment is a major factor limiting the clinical use of anticancer agents. When tumor cells acquire resistance to anticancer drug, they show cross-resistance to other antitumor agents. In the present study, SNU-1 cell was induced adriamycin 10-7 drug resistance, SNU-1/ADR, in vitro culture system. We got the doubling time and number for viability test during 96 hours by MTT assay. To investigate the cross resistance of various anticancer drugs in human stomach cancer cell SNU-1 and SNU-1/ADR, We compared IC50 (drug concentration of 50% reduction) and the relative resistance (RR). SNU-1/ADR was expressed multidrug resistant with vinblastine (RR;>31.62), vincristine (RR;29.50), dactinomycin (RR;21.37), epirubicin (RR;17.78), daunorubicin (RR;14.12), adriamycin (RR;7.76), and etoposide (RR;4.46), and other drugs, 5-fluorouracil, cisplatin, cyclophosphamide, methotrexate, and calarubicin, have not cross resistant with adriamycin. There was double minute chromosome in SNU-1/ADR by karyotyping although this change was not seen in SUN-1.

Mutagenicity of Human Urine Excreted after Ingestion of Roast Beef.: Dong Gu Shin, Jung Hee Kim, Jae Ryong Kim; Yeungnam Univ J Med. 1987;4(2):105-111. Published online December 31, 1987; DOI: https://doi.org/10.12701/yujm.1987.4.2.105

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Abstract PDF: This study was undertaken to observe the mutagenic occurrence in urine excreted after the ingestion of roast beef. Two healthy nonsmoker persons of both sex were selected for this test, employing two strains (TA98, TA100) of Salmonella typhimurium according to Ames' method. The mutagenic activity began to appear in urine of both sex three hours after ingestion of 300 g of roast beef, gradually increasing until 6 hours and declining thereafter.

Production of Monoclonal Antibody to Polychlorinated Biphenyl Induced Cytochrome P-450 LMII in Rat Liver.: Jung Hye Kim, Jae Ryong Kim, Ki Yung Lee; Yeungnam Univ J Med. 1986;3(1):103-110. Published online December 31, 1986; DOI: https://doi.org/10.12701/yujm.1986.3.1.103

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Abstract PDF: Cytochrome P-450 (CP-450) is one of the three components of the liver microsomal enzyme system which hydroxylates fatty acids, hydrocarbons and a variety of drugs and other foreign compounds. Female Balb/c mice were immunized with purified polychlorinated biphenyl (PCB) – induced CP-450 LMII. The spleen cells derived from immunized mice were fused with SP2 myeloma cells using polyethylene glycol (PEG 3500). The hybrid cells were selected by hypoxanthine-aminopterin-thymidine (HAT) medium and the culture fluid were screened by enzyme-linked immunosorbent assay to CP450 LMII. The hybrid cells(×107) were inoculated into intraperitoneal cavity of Balb/c mice for the purpose of production of ascetic fluids. Monoclonal antibody (Mab) was purified from ascitic fluid by DEAE cellulose ion exchange chromatography and I¹²⁵ labeled Mab was also confirmed by autoradiography and SDS-polyacrylamide gel electrophoresis (MW:55,000 and 110,000)

Purification of Band 3 from the Human Erythrocyte Membrane and its Incorporation into Liposome.: Jae Ryong Kim, Jung Hye Kim, Ki Yung Lee; Yeungnam Univ J Med. 1986;3(1):41-48. Published online December 31, 1986; DOI: https://doi.org/10.12701/yujm.1986.3.1.41

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Abstract PDF: Band 3, the predominant 95,000 dalton anion transport protein, is the major intrinsic glycoprotein of the human erythrocyte membrane. This anion carrier exists as a dimer and binds the cytoskeletons such as spectrin, ankyrin and actin. And the liposomes are vesicular structures which form spontaneously upon hydration of phospholipids. These artificial lipid vesicles have been investigated as model of the biological membranes and as a mean of improving the delivery of nucleic acids, drugs, proteins and biological substances to specific target tissues and cells. In this study, we were purified Band 3 from the human erythrocyte membrane (ghost) was prepared by hemolysis of intact human erythrocyte with weak alkali-hypotonic solution. Band 6 was removed from ghost by extracting with solution of an ionic strength of 0.15. Band 3 and Band 4 were solubilized selectively by extracting Band 6-depleted ghosts with Triton X-100 under nondenaturing conditions. Band 3 was then purified from Triton X-100 extract treated with p-chloromercuribenzoate by sucrose density gradient ultracentrifugation. This purified Band 3 was incorporated into liposomes prepared by reverse-phase evaporation. Phosphatidyl L-serine and cholesterol (1:1 molar ratio) were dissolved in chloroform and the chloroform was removed by rotator evaporation under reduced pressure. Band 3 solution without Triton X-100 was introduced into a mixture of lipids and diethylether. Diethylether was subsequently removed by evaporation. This purified Band 3 and its incorporation into liposomes were confirmed by sodium dodecyl sulfate-polyacrylamide gel electrophoresis.

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