43 results on '"Jae Bong Kim"'
Search Results
2. A Rare Complication after Latissimus Dorsi Flap Breast Reconstruction: Radial Nerve Palsy
- Author
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Joon Hyun Kwon, Jae Bong Kim, Jeong Woo Lee, Kang Young Choi, Ho Yun Chung, Byung Chae Cho, and Jung Dug Yang
- Subjects
mammaplasty ,radial neuropathy ,superficial back muscles ,Surgery ,RD1-811 - Abstract
Among autologous breast reconstruction techniques, breast reconstruction using the latissimus dorsi musculocutaneous flap is widely used, offering advantages including the relative simplicity of the procedure and the reliable and consistent vascularity of the flap. Accordingly, more than 500 cases have been performed in the past 8 years at Kyungpook National University Medical Center. This study reports on a rare case involving a radial nerve neuropathy complication which was experienced for the first time at the medical center. The current case demonstrates that in addition to common complications, such as seroma of the donor site and scarring, additional intraoperative complications in areas unrelated to the surgical site can occur, including radial nerve neuropathy in the opposite arm.
- Published
- 2016
- Full Text
- View/download PDF
3. Pseudoangiomatous Stromal Hyperplasia Presenting as Rapidly Growing Bilateral Breast Enlargement Refractory to Surgical Excision
- Author
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Jeong Woo Lee, Gyu Sik Jung, Jae Bong Kim, Kang Young Choi, Ho Yun Chung, Byung Chae Cho, Ji Young Park, Hye Jung Kim, Ho Yong Park, and Jung Dug Yang
- Subjects
Surgery ,RD1-811 - Published
- 2016
- Full Text
- View/download PDF
4. Cervicofacial Lymphatic Malformations: A Retrospective Review of 40 Cases
- Author
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Byung Chae Cho, Jae Bong Kim, Jeong Woo Lee, Kang Young Choi, Jung Dug Yang, Seok-Jong Lee, Yong-Sun Kim, Jong Min Lee, Seung Huh, and Ho Yun Chung
- Subjects
lymphatic abnormalities ,lymphangioma ,sclerotherapy ,Surgery ,RD1-811 - Abstract
Background Lymphatic malformation (LM) is a form of congenital vascular malformation with a low incidence. Although LM has been studied, no consensus has emerged regarding its cause or treatment. Methods In this study, we retrospectively evaluated 40 patients who visited our vascular anomalies center for the treatment of cervicofacial LM, which is a common manifestation of LM. The medical records of patients over a period of 12 years were reviewed and analyzed for commonalities regarding the diagnosis and the results of treatment. Results Suspected cervicofacial LM was confirmed through imaging studies. No difference in incidence was observed according to sex, and 73% of patients first presented with symptoms before the age of two years. The left side and the V2–V3 area were most commonly affected. No significant differences in incidence were observed among the macrocystic, microcystic, and combined types of LM. A total of 28 out of 36 patients received sclerotherapy as the first choice of treatment, regardless of the type of lesion. Complete resolution was achieved in only 25% of patients. Conclusions LM is important to confirm the diagnosis early and to choose an appropriate treatment strategy according to the stage of the disease and each individual patient's symptoms. When treatment is delayed or an incorrect treatment is administered, patient discomfort increases as the lesion gradually spreads. Therefore, more so than is the case for most other diseases, a team approach on a case-by-case basis is important for the accurate and appropriate treatment of LM.
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- 2016
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5. Integration of National Health Insurance claims data and animal models reveals fexofenadine as a promising repurposed drug for Parkinson’s disease
- Author
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Jae-Bong Kim, Yujeong Kim, Soo-Jeong Kim, Tae‑Young Ha, Dong-Kyu Kim, Dong Won Kim, Minyoung So, Seung Ho Kim, Hyun Goo Woo, Dukyong Yoon, and Sang Myun Park
- Subjects
Parkinson’s disease ,α-Synuclein ,Drug repositioning ,Antihistamine ,Fexofenadine ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Background Parkinson’s disease (PD) is a common and costly progressive neurodegenerative disease of unclear etiology. A disease-modifying approach that can directly stop or slow its progression remains a major unmet need in the treatment of PD. A clinical pharmacology-based drug repositioning strategy is a useful approach for identifying new drugs for PD. Methods We analyzed claims data obtained from the National Health Insurance Service (NHIS), which covers a significant portion of the South Korean population, to investigate the association between antihistamines, a class of drugs commonly used to treat allergic symptoms by blocking H1 receptor, and PD in a real-world setting. Additionally, we validated this model using various animal models of PD such as the 6-hydroxydopmaine (6-OHDA), α-synuclein preformed fibrils (PFF) injection, and Caenorhabditis elegans (C. elegans) models. Finally, whole transcriptome data and Ingenuity Pathway Analysis (IPA) were used to elucidate drug mechanism pathways. Results We identified fexofenadine as the most promising candidate using National Health Insurance claims data in the real world. In several animal models, including the 6-OHDA, PFF injection, and C. elegans models, fexofenadine ameliorated PD-related pathologies. RNA-seq analysis and the subsequent experiments suggested that fexofenadine is effective in PD via inhibition of peripheral immune cell infiltration into the brain. Conclusion Fexofenadine shows promise for the treatment of PD, identified through clinical data and validated in diverse animal models. This combined clinical and preclinical approach offers valuable insights for developing novel PD therapeutics.
- Published
- 2024
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6. Age-related increase in caveolin-1 expression facilitates cell-to-cell transmission of α-synuclein in neurons
- Author
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Tae-Young Ha, Yu Ree Choi, Hye Rin Noh, Seon-Heui Cha, Jae-Bong Kim, and Sang Myun Park
- Subjects
Parkinson’s disease ,α-synuclein ,Cell-to-cell transmission ,Endocytosis ,Caveolin-1 ,Aging ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Abstract Parkinson's disease (PD) is the second most prevalent neurodegenerative disease, with aging being considered the greatest risk factor for developing PD. Caveolin-1 (Cav-1) is known to participate in the aging process. Recent evidence indicates that prion-like propagation of misfolded α-synuclein (α-syn) released from neurons to neighboring neurons plays an important role in PD progression. In the present study, we demonstrated that cav-1 expression in the brain increased with age, and considerably increased in the brain of A53T α-syn transgenic mice. Cav-1 overexpression facilitated the uptake of α-syn into neurons and formation of additional Lewy body-like inclusion bodies, phosphorylation of cav-1 at tyrosine 14 was found to be crucial for this process. This study demonstrates the relationship between age and α-syn spread and will facilitate our understanding of the molecular mechanism of the cell-to-cell transmission of α-syn.
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- 2021
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7. Prion-like Propagation of α-Synuclein Is Regulated by the FcγRIIB-SHP-1/2 Signaling Pathway in Neurons
- Author
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Yu Ree Choi, Seon-Heui Cha, Seo-Jun Kang, Jae-Bong Kim, Ilo Jou, and Sang Myun Park
- Subjects
Biology (General) ,QH301-705.5 - Abstract
Summary: Recent evidence of prion-like propagation of α-synuclein (α-syn) into neighboring neurons set up a paradigm to elucidate the mechanism of progression of Parkinson’s disease (PD) and to develop therapeutic strategies. Here, we show that FcγRIIB expressed in neurons functions as a receptor for α-syn fibrils and mediates cell-to-cell transmission of α-syn. SHP-1 and 2 are activated downstream by α-syn fibrils through FcγRIIB and play an important role in cell-to-cell transmission of α-syn. Also, taking advantage of a co-culture system, we show that cell-to-cell transmission of α-syn induces intracellular Lewy body-like inclusion body formation and that the FcγRIIB/SHP-1/2 signaling pathway is involved in it. Therefore, the FcγRIIB-SHP-1/-2 signaling pathway may be a therapeutic target for the progression of PD. The in vitro system is an efficient tool for further high-throughput screening that can be used for developing a therapeutic intervention in PD. : Prion-like propagation of α-synuclein (α-syn) may contribute to the progression of Parkinson’s disease. Choi et al. demonstrate that FcγRIIB functions as a receptor for α-syn fibrils and that the FcγRIIB-SHP-1/2 signaling pathway mediates cell-to-cell transmission of α-syn. Blocking this signaling pathway attenuates transmission, suppressing Lewy body-like inclusion body formation. Keywords: α-synuclein, cell-to-cell transmission, FcγRIIB, SHP-1, SHP-2
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- 2018
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8. Experimental and Measurement Methods for the Small-Scale Model Testing of Lateral and Torsional Stability
- Author
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Jong-Han Lee, Yong Myung Park, Chi-Young Jung, and Jae-Bong Kim
- Subjects
lateral torsional stability ,critical load ,in-plane behavior ,out-of-plane behavior ,lateral deformation ,rotational angle ,Systems of building construction. Including fireproof construction, concrete construction ,TH1000-1725 - Abstract
Abstract Tests of the lateral and torsional stability are quite sensitive to the experimental conditions, such as support conditions and loading system. Controlling all of these conditions in a full-size test is a very challenging task. Therefore, in this paper, an experimental measurement method that can control the experimental conditions using a small-scale model was proposed to evaluate the lateral and torsional stability of beams. For this, a loading system was provided to maintain the vertical direction of the load applied to the beam, and a support frame was produced to satisfy the in-plane and out-of-plane support conditions. The experimental method using a small-scale model was applied successively to the lateral and torsional behavior and stability of I-shaped beams. The proposed experimental methods, which effectively accommodate the changes in the geometry and length of the beam, could contribute to further experimental studies regarding the lateral and torsional stability of flexural members.
- Published
- 2017
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9. 한국과 중국의 비교 관점에서 본 은행 브랜드 가치와 핵심 역량 고찰
- Author
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Korea Maritime Economics, Ruijin Guo, and Jae Bong Kim
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- 2021
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10. Neuronal ApoE Regulates the Cell-to-Cell Transmission of α-Synuclein
- Author
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Seo-Jun Kang, Soo-Jeong Kim, Hye Rin Noh, Beom Jin Kim, Jae-Bong Kim, Uram Jin, Sun Ah Park, and Sang Myun Park
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Neurons ,Organic Chemistry ,Parkinson Disease ,General Medicine ,Catalysis ,Computer Science Applications ,Inorganic Chemistry ,Mice ,Apolipoproteins E ,Parkinson’s disease ,Lewy body ,α-synuclein propagation ,α-synuclein uptake ,α-synuclein release ,ApoE ,alpha-Synuclein ,Animals ,Lewy Bodies ,Physical and Theoretical Chemistry ,Molecular Biology ,Spectroscopy - Abstract
The presence of protein inclusions, called Lewy bodies (LBs) and Lewy neurites (LNs), in the brain is the main feature of Parkinson’s disease (PD). Recent evidence that the prion-like propagation of α-synuclein (α-syn), as a major component of LBs and LNs, plays an important role in the progression of PD has gained much attention, although the molecular mechanism remains unclear. In this study, we evaluated whether neuronal ApoE regulates the cell-to-cell transmission of α-syn and explored its molecular mechanism using in vitro and in vivo model systems. We demonstrate that neuronal ApoE deficiency attenuates both α-syn uptake and release by downregulating LRP-1 and LDLR expression and enhancing chaperone-mediated autophagy activity, respectively, thereby contributing to α-syn propagation. In addition, we observed that α-syn propagation was attenuated in ApoE knockout mice injected with pre-formed mouse α-syn fibrils. This study will help our understanding of the molecular mechanisms underlying α-syn propagation.
- Published
- 2022
11. Shear capacity of cast-in headed anchors in steel fiber-reinforced concrete
- Author
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Kun-Joon Lee, Jong-Han Lee, Chi Young Jung, Baik-Soon Cho, and Jae-Bong Kim
- Subjects
Materials science ,Breakout ,Embedment ,business.industry ,0211 other engineering and technologies ,020101 civil engineering ,02 engineering and technology ,Structural engineering ,Fiber-reinforced concrete ,0201 civil engineering ,law.invention ,Flexural strength ,Shear (geology) ,law ,021105 building & construction ,Material properties ,business ,Civil and Structural Engineering ,Shear capacity - Abstract
This paper investigates the concrete breakout shear capacity of a single cast-in headed anchor embedded in steel fiber-reinforced concrete (SFRC). Experiments were carried out for anchors with a diameter of 30 mm, embedment depth of 240 mm, and edge distance of 150 mm. Fiber volume fractions of 0.33, 0.67, and 1.00% were examined. In addition to shear tests, four-point bending tests were carried out to evaluate the relationship between the material properties of SFRC and the shear capacity of anchors. The experimental results show that the current design formulas are valid for anchors in conventional plain concrete but not appropriate for the shear capacity of anchors in SFRC. Using the equivalent flexural strength ratio, a revised design equation is proposed to incorporate the effect of the steel fiber content on the concrete breakout shear capacity and provide reasonably similar safety for anchors in both un-reinforced and SFRC.
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- 2018
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12. Retention Improvement in Fluoride Application with Cold Atmospheric Plasma
- Author
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Su-Ryun Kim, Yoo-Mi Kim, H. J. Lee, Hyun-Hee Lee, G. C. Kim, J Y Joo, and Jae-Bong Kim
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Saliva ,Plasma Gases ,Acid resistance ,Dental Caries ,In Vitro Techniques ,01 natural sciences ,03 medical and health sciences ,Acidulated Phosphate Fluoride ,chemistry.chemical_compound ,0302 clinical medicine ,Combined treatment ,0103 physical sciences ,Humans ,Fluorides, Topical ,Dental Enamel ,General Dentistry ,010302 applied physics ,Chromatography ,Enamel paint ,Chemistry ,Research Reports ,030206 dentistry ,Molar ,Demineralization ,Tooth demineralization ,Tooth Remineralization ,visual_art ,Environmental chemistry ,visual_art.visual_art_medium ,Gels ,Fluoride - Abstract
This study aimed to apply fluoride formulations to enamel with cold atmospheric plasma (CAP) and analyze the fluoride uptake, retention, and acid resistance quantitatively. Human enamel specimens were divided randomly into 2 groups: group APF1, 1.23% acidulated phosphate fluoride (APF) gel; group APF2, 1.23% APF gel with CAP. Fluoride and CAP were applied to the samples 4 times at 1-wk intervals. The specimens were also stored in artificial saliva for 4 wk to evaluate the retention of fluoride. The fluoride content on the fluoride-treated enamel was measured by an electron probe microanalyzer. To detect the resistance to demineralization, the calcium-to-phosphate ratio of the enamel samples was measured after the application of APF gel with or without CAP, followed by soaking in the demineralization solution. In groups APF1 and APF2, the amount of fluoride detected increased depending on the application frequency, and more fluoride was detected in group APF2 than in group APF1. In the experiment examining the maintenance effect, fluoride was not detected in group APF1, whereas fluoride was detected in group APF2 up to the fourth week. As for the resistance to demineralization, the calcium-to-phosphate ratio of the enamel treated with APF and CAP was higher than that treated with APF alone, and it increased with the frequency of treatment. This study suggests that the combination treatment of CAP and fluoride improves retention of fluoride on the enamel and resistance to demineralization when compared with treatment with fluoride alone.
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- 2017
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13. Experimental and Measurement Methods for the Small-Scale Model Testing of Lateral and Torsional Stability
- Author
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Yong Myung Park, Jong-Han Lee, Chi Young Jung, and Jae-Bong Kim
- Subjects
Engineering ,in-plane behavior ,020101 civil engineering ,Ocean Engineering ,02 engineering and technology ,Stability (probability) ,0201 civil engineering ,rotational angle ,0203 mechanical engineering ,Flexural strength ,Vertical direction ,lateral torsional stability ,lcsh:Systems of building construction. Including fireproof construction, concrete construction ,lcsh:TH1000-1725 ,Civil and Structural Engineering ,Structural material ,Critical load ,critical load ,business.industry ,Structural engineering ,lateral deformation ,020303 mechanical engineering & transports ,out-of-plane behavior ,Solid mechanics ,business ,Scale model ,Beam (structure) - Abstract
Tests of the lateral and torsional stability are quite sensitive to the experimental conditions, such as support conditions and loading system. Controlling all of these conditions in a full-size test is a very challenging task. Therefore, in this paper, an experimental measurement method that can control the experimental conditions using a small-scale model was proposed to evaluate the lateral and torsional stability of beams. For this, a loading system was provided to maintain the vertical direction of the load applied to the beam, and a support frame was produced to satisfy the in-plane and out-of-plane support conditions. The experimental method using a small-scale model was applied successively to the lateral and torsional behavior and stability of I-shaped beams. The proposed experimental methods, which effectively accommodate the changes in the geometry and length of the beam, could contribute to further experimental studies regarding the lateral and torsional stability of flexural members.
- Published
- 2017
- Full Text
- View/download PDF
14. A Rare Complication after Latissimus Dorsi Flap Breast Reconstruction: Radial Nerve Palsy
- Author
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Jeong Woo Lee, Joon Hyun Kwon, Jae Bong Kim, Byung Chae Cho, Kang Young Choi, Jung Dug Yang, and Ho Yun Chung
- Subjects
medicine.medical_specialty ,superficial back muscles ,Palsy ,business.industry ,medicine.medical_treatment ,radial neuropathy ,lcsh:Surgery ,Radial neuropathy ,General Medicine ,lcsh:RD1-811 ,030230 surgery ,medicine.disease ,Surgery ,03 medical and health sciences ,Plastic surgery ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Mammaplasty ,medicine ,Latissimus dorsi flap ,Breast reconstruction ,Complication ,business ,Radial nerve ,mammaplasty - Abstract
Among autologous breast reconstruction techniques, breast reconstruction using the latissimus dorsi musculocutaneous flap is widely used, offering advantages including the relative simplicity of the procedure and the reliable and consistent vascularity of the flap. Accordingly, more than 500 cases have been performed in the past 8 years at Kyungpook National University Medical Center. This study reports on a rare case involving a radial nerve neuropathy complication which was experienced for the first time at the medical center. The current case demonstrates that in addition to common complications, such as seroma of the donor site and scarring, additional intraoperative complications in areas unrelated to the surgical site can occur, including radial nerve neuropathy in the opposite arm.
- Published
- 2016
15. Pseudoangiomatous Stromal Hyperplasia Presenting as Rapidly Growing Bilateral Breast Enlargement Refractory to Surgical Excision
- Author
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Ho Yong Park, Hye Jung Kim, Byung Chae Cho, Gyu Sik Jung, Jung Dug Yang, Jeong Woo Lee, Kang Young Choi, Ho Yun Chung, Jae Bong Kim, and Ji-Young Park
- Subjects
Pseudoangiomatous stromal hyperplasia ,medicine.medical_specialty ,Pathology ,business.industry ,lcsh:Surgery ,lcsh:RD1-811 ,medicine.disease ,030218 nuclear medicine & medical imaging ,Lesion ,Pathogenesis ,03 medical and health sciences ,Plastic surgery ,0302 clinical medicine ,Refractory ,030220 oncology & carcinogenesis ,Breast enlargement ,Image ,Medicine ,Surgery ,Surgical excision ,medicine.symptom ,business ,Surgical incision - Abstract
Pseudoangiomatous stromal hyperplasia (PASH) is a benign proliferative mesenchymal lesion of the breast. PASH presents as a palpable or mammographically detectable mass or is an incidental microscopic finding in up to 23% of breast biopsies. Its pathogenesis is unclear but may involve hormonal factors, as recently postulated. Its clinical, cytological, and radiological characteristics resemble those of other benign tumors, including low-grade angiosarcomas and phyllodes tumors. Because of its uncertain pathogenesis, PASH is usually treated via surgical excision, with post-excision recurrence rates ranging from 7% to 22% [1]. Although several cases of PASH have been recently reported, cases of PASH involving large, rapidly growing lesions refractory to surgical incision are rare [2]. In this study, we report our experience with a case of PASH that presented as rapidly growing bilateral breast enlargement refractory to surgical excision. We also review the pertinent literature, including the clinical and histopathological features, pathogenesis, imaging findings, treatment, and prognosis of PASH.
- Published
- 2016
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16. Static Shear Strength of Cast-in Anchors with Stirrup Reinforcement
- Author
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Yong Myung Park, Sung Hoon Jo, Tae Hyung Kim, Jae Bong Kim, and Choong Hyun Kang
- Subjects
Materials science ,business.industry ,0211 other engineering and technologies ,020101 civil engineering ,02 engineering and technology ,Structural engineering ,0201 civil engineering ,Stirrup ,021105 building & construction ,Shear strength ,Geotechnical engineering ,Composite material ,Reinforcement ,business - Published
- 2016
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17. The usefulness of pedicled perforator flap in partial breast reconstruction after breast conserving surgery in Korean women
- Author
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Kang Young Choi, Ho Yong Park, Ho Yun Chung, Jeong Woo Lee, Dong Kyu Kim, Jee Yeon Lee, Jung Dug Yang, Byung Chae Cho, and Jae Bong Kim
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medicine.medical_specialty ,Latissimus dorsi flap ,Breast surgery ,medicine.medical_treatment ,lcsh:Surgery ,030230 surgery ,03 medical and health sciences ,0302 clinical medicine ,Patient satisfaction ,Breast cancer ,medicine.artery ,medicine ,Breast-conserving surgery ,Breast reconstruction ,Thoracodorsal artery ,business.industry ,Intercostal artery perforator flap ,lcsh:RD1-811 ,medicine.disease ,Surgery ,Thoracodorsal artery perforator flap ,030220 oncology & carcinogenesis ,Oncoplastic breast surgery ,Original Article ,business ,Intercostal arteries ,Perforator flaps - Abstract
Background The emergence of breast-conserving surgery combined with radiotherapy as the treatment of choice for early stage breast cancer has resulted in greater focus on oncoplastic breast surgery. The use of perforator flaps has particularly gained in reputation for its effectiveness in the reconstruction of partial breast defects in Korean women. Herein, we present our experience with the use of thoracodorsal artery perforator (TDAP) and lateral intercostal artery perforator (LICAP) flaps. Methods This study included 33 patients who underwent breast reconstruction using TDAP or LICAP flaps at our hospital from January 2011 to December 2014. Data from patient medical records, and patient satisfaction surveys, which were conducted 12 months postoperatively, were retrospectively evaluated. Results TDAP and LICAP flap-based reconstructions were performed in 14 and 19 patients, respectively. Five patients developed complications that required additional intervention. Overall patient satisfaction was observed to be excellent in 15 (46%) patients, and good in 12 (36%). Conclusions Based on our experience, oncoplastic breast surgery using TDAP or LICAP flap is an effective remodeling technique for small-to-moderate breast defects in Korean women with smaller breasts.
- Published
- 2017
18. Prion-like Propagation of α-Synuclein Is Regulated by the FcγRIIB-SHP-1/2 Signaling Pathway in Neurons
- Author
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Seon-Heui Cha, Ilo Jou, Sang Myun Park, Jae-Bong Kim, Yu Ree Choi, and Seo-Jun Kang
- Subjects
0301 basic medicine ,Prions ,animal diseases ,Protein Tyrosine Phosphatase, Non-Receptor Type 11 ,General Biochemistry, Genetics and Molecular Biology ,Cell Line ,03 medical and health sciences ,0302 clinical medicine ,Cell to cell transmission ,Humans ,Prion protein ,Receptor ,lcsh:QH301-705.5 ,Neurons ,Mechanism (biology) ,Chemistry ,Protein Tyrosine Phosphatase, Non-Receptor Type 6 ,Receptors, IgG ,Parkinson Disease ,nervous system diseases ,Cell biology ,Protein Transport ,030104 developmental biology ,lcsh:Biology (General) ,nervous system ,alpha-Synuclein ,α synuclein ,Signal transduction ,030217 neurology & neurosurgery ,Intracellular ,Signal Transduction - Abstract
Summary: Recent evidence of prion-like propagation of α-synuclein (α-syn) into neighboring neurons set up a paradigm to elucidate the mechanism of progression of Parkinson’s disease (PD) and to develop therapeutic strategies. Here, we show that FcγRIIB expressed in neurons functions as a receptor for α-syn fibrils and mediates cell-to-cell transmission of α-syn. SHP-1 and 2 are activated downstream by α-syn fibrils through FcγRIIB and play an important role in cell-to-cell transmission of α-syn. Also, taking advantage of a co-culture system, we show that cell-to-cell transmission of α-syn induces intracellular Lewy body-like inclusion body formation and that the FcγRIIB/SHP-1/2 signaling pathway is involved in it. Therefore, the FcγRIIB-SHP-1/-2 signaling pathway may be a therapeutic target for the progression of PD. The in vitro system is an efficient tool for further high-throughput screening that can be used for developing a therapeutic intervention in PD. : Prion-like propagation of α-synuclein (α-syn) may contribute to the progression of Parkinson’s disease. Choi et al. demonstrate that FcγRIIB functions as a receptor for α-syn fibrils and that the FcγRIIB-SHP-1/2 signaling pathway mediates cell-to-cell transmission of α-syn. Blocking this signaling pathway attenuates transmission, suppressing Lewy body-like inclusion body formation. Keywords: α-synuclein, cell-to-cell transmission, FcγRIIB, SHP-1, SHP-2
- Published
- 2017
19. Antioxidant Activity and Its Mechanism of Chelidonium majus Extract
- Author
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Jae Bong Park, Jae Bong Kim, Sung Chan Kim, Jae-Yong Lee, Jee In Heo, Jeong Hyeon Kim, Soon Sung Lim, and Jeong-Min Lee
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chemistry.chemical_classification ,Cell cycle checkpoint ,Antioxidant ,biology ,business.industry ,DNA repair ,medicine.medical_treatment ,Pharmaceutical Science ,Plant Science ,Pharmacology ,biology.organism_classification ,Biochemistry, Genetics and Molecular Biology (miscellaneous) ,Enzyme ,chemistry ,Acetylation ,Apoptosis ,Botany ,Medicine ,Chelidonium ,business ,Agronomy and Crop Science ,Transcription factor - Abstract
*Department of Biochemistry, Hallym University Medical School, Chuncheon 200-702, Korea.**Institute of Natural Medicine, Hallym University Medical School, Chuncheon 200-702, Korea.***Department of Food and Nutrition, College of Natural Sciences, Hallym University, Chuncheon 200-702, Korea.****Institute of Cell Differentiation and Aging, Hallym University Medical School, Chuncheon 200-702, Korea.ABSTRACT : Chelidonium majus (CM) contains several isoquinoline alkaloids that have been reported to have various bio-logical activities such as anti-inflammatory, antimicrobial, antioxidant, immune-modulatory, and antitumoral. It has beenreported that the extract of CM had an antioxidant potential, however the mechanism has not been verified. In this study,we found that CM extract activated FOXO3a. FOXO3a is a transcription factor that involved in various biological processessuch as cell cycle arrest, apoptosis, DNA repair, and ROS detoxification. Transcriptional activities of FOXO3a were regu-lated by post-translational modifications including phosphorylation, acetylation, and ubiquitination. Protein level ofFOXO3a was increased by CM extract. Promoter activities of FOXO-transcriptional target genes such as MnSOD, p27 andGADD45 were activated by CM extract in a dose dependent manner. In addition, protein level of MnSOD, major antioxi-dant enzyme, was increased by CM extract. Thereby ROS level was decreased by CM in old HEF cells. These results suggestthat CM extract has an antioxidant activity through FOXO activation. Key Words : Chelidonium majus, FOXO3a, Antioxidant
- Published
- 2013
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20. A Study on the Policy for Introduction of WIG Craft into Coastal Passenger Service
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Jae-Bong Kim, Hong-Won Yi, and Yong-Sik Oh
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Finance ,Engineering ,business.industry ,media_common.quotation_subject ,Analytic hierarchy process ,Legislation ,Certification ,Commercialization ,Craft ,Port State Control ,Order (exchange) ,Service (economics) ,ComputerApplications_GENERAL ,Operations management ,business ,media_common - Abstract
The purpose of this study is to review and suggest coastal shipping policies for introduction of WIG craft into domenstic passenger shipping market. Two Korean companies are leading in the development of WIG craft as an innovative sea transportation vehicle, and it is awaiting for commercialization. WIG craft is expected to be commercialized from coastal passenger market and we used AHP method to investigate the major factors and its` priority for smooth market entry. The results shows that priorities are on the WIG craft legislation, dock installation and operation, port state control, and pilot hiring and training, craft maintenance, and ship`s certification in order.
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- 2012
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21. An Application of ERM to Risk Management in the Logistics: A Case
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Seung-Min Lim, Jae-Bong Kim, and Taeho Park
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Supply chain management ,Humanitarian Logistics ,Traffic management ,Risk analysis (engineering) ,Enterprise risk management ,business.industry ,Supply chain ,Integrated logistics support ,Operations management ,Supply chain network ,business ,Risk management - Abstract
Logistics in a supply chain network has become an important operational strategy in a competitive market. A number of internal and external risks involved in the logistics operations in a company tend to create problems in fulfilling customer orders. This research presents how ERM (enterprise risk management) can be used to identify, assess, and control logistics risks. An electronic company's logistics activities were used as an industry case to demonstrate a way to identify and assess risks surrounding global logistics function. This paper has further presented action plans to mitigate the impact of the risks that occur.
- Published
- 2012
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22. Some Suggestions for Making Questions of Essay Type Bar Examination of Criminal Law and Criminal Procedure
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Jae-Bong Kim
- Subjects
Theory of criminal justice ,Bar (music) ,Law ,Criminal law ,Criminal procedure ,Sociology ,Criminology - Published
- 2011
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23. On the Development of Urban Fishing Ports in Busan - Focusing on the Development Demands of Interested Parties
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Jae-Bong Kim, Geum-Hong Seo, and Yong-Sik Oh
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Harmony (color) ,Geography ,Resource (biology) ,Urbanization ,Fishing ,Environmental engineering ,Port (computer networking) ,Environmental planning - Abstract
In the central Busan area from Haeundae to Saha, fishing villages are vanished actually in the progress of urbanization, and 17 fishing ports surrounded by urbanized area are left alone and isolated. But, we think these urbanized fishing ports are the very resource which grant the identity as the marine city and they have considerable potentials to enhance the value of neighboring community depending on the proper development of it. In this study, we defined the fishing ports in central Busan area as the representatives of `urban fishing port`, and tried to find the way of coexistence and harmony between `city` and `fishing port`. For this purpose, we investigated the fishery potentials, physical environments and development demands of 17 fishing ports in central Busan area, and composed opinions from fishing communities and neighboring inhabitants to set up the long term directions of urban fishing ports development for harmonious coexistence of city and fishing port.
- Published
- 2010
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24. Overexpression of stathmin1 in the diffuse type of gastric cancer and its roles in proliferation and migration of gastric cancer cells
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Yongseok Lee, Sun-Yong Baek, Hur Gy, Sae-Ock Oh, Sik Yoon, Bongsoo Kim, Geun-Am Song, Hyun-Chul Kim, Jin Young Kim, Jae-Bong Kim, Tae-Yong Jeon, Myoung-Eun Han, Young-Suk Lee, and Gwang Ha Kim
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Male ,Cancer Research ,Pathology ,medicine.medical_specialty ,proliferation ,Mice, Nude ,Stathmin ,migration ,Mice ,Downregulation and upregulation ,Cell Movement ,Stomach Neoplasms ,Carcinoma ,medicine ,Animals ,Humans ,Neoplasm Invasiveness ,RNA, Small Interfering ,Stomach cancer ,Cells, Cultured ,stathmin1 ,Aged ,Cell Proliferation ,biology ,Cell growth ,gastric cancer ,digestive, oral, and skin physiology ,Cancer ,Cell migration ,Middle Aged ,medicine.disease ,Xenograft Model Antitumor Assays ,digestive system diseases ,Up-Regulation ,Gene Expression Regulation, Neoplastic ,Oncology ,Case-Control Studies ,Cancer cell ,biology.protein ,Female ,Translational Therapeutics - Abstract
Background: Stathmin1 is a microtubule-regulating protein that has an important role in the assembly and disassembly of the mitotic spindle. The roles of stathmin1 in carcinogenesis of various cancers, including prostate and breast cancer, have been explored. However, its expression and roles in gastric cancer have not yet been described. Methods: Stathmin1 expression in paraffin-embedded tissue sections from 226 patients was analysed by immunohistochemistry. Roles of stathmin1 were studied using a specific small interfering RNA (siRNA). Results: The expression of stathmin1 was positively correlated with lymph node metastasis, TNM stages and vascular invasion, and negatively with recurrence-free survival, in the diffuse type of gastric cancer. The median recurrence-free survival in patients with a negative and positive expression of stathmin1 was 17.0 and 7.0 months, respectively (P=0.009). When the expression of stathmin1 was knocked down using siRNA, the proliferation, migration and invasion of poorly differentiated gastric cancer cells in vitro were significantly inhibited. Moreover, stathmin1 siRNA transfection significantly slowed the growth of xenografts in nude mice. Conclusion: These results suggest that stathmin1 can be a good prognostic factor for recurrence-free survival rate and is a therapeutic target in diffuse-type gastric cancer.
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- 2010
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25. Hedgehog signaling regulates proliferation of prostate cancer cells via stathmin1
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Sun-Yong Baek, Young-Suk Lee, Myoung-Eun Han, Jae-Bong Kim, Moon-Kee Chung, Sae-Ock Oh, Sik Yoon, Hyun Jung Kim, and Bong-Seon Kim
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Male ,Patched Receptors ,Patched ,medicine.medical_specialty ,Cyclopamine ,Receptors, Cell Surface ,Biology ,General Biochemistry, Genetics and Molecular Biology ,Mice ,chemistry.chemical_compound ,Prostate cancer ,Prostate ,GLI1 ,Internal medicine ,medicine ,Animals ,Humans ,Hedgehog Proteins ,Gene Silencing ,Enzyme Inhibitors ,RNA, Small Interfering ,Cell Proliferation ,Veratrum Alkaloids ,Prostatic Neoplasms ,Cancer ,General Medicine ,medicine.disease ,Hedgehog signaling pathway ,Patched-1 Receptor ,medicine.anatomical_structure ,Endocrinology ,chemistry ,Cancer cell ,Cancer research ,biology.protein ,Stathmin ,Signal Transduction - Abstract
Hedgehog (Hh) signaling is an essential pathway in embryonic development of prostate. Hh also plays roles in the proliferation of progenitor cells and cancer cells of adult prostate. However, how Hh signaling contributes to carcinogenesis of prostate is poorly understood. Stathmin1 is a microtubule-regulating protein that plays an important role in the assembly and disassembly of the mitotic spindle. Stathmin1 is expressed in normal developing mouse prostate and in prostate cancer. The expression pattern of stathmin1 is similar to that of Shh in prostate development and cancer, suggesting a connection between these two proteins. In this study, we examined the relationship between stathmin1 and Hh signaling. Here, we show that stathmin1 expression is regulated by Hh signaling in prostate cancer cells. Cyclopamine, a specific inhibitor of Hh signaling, reduced the expression of stathmin1 in prostate cancer cells. However, the Shh peptide induced stathmin1 expression. Overexpression of Gli1 further confirmed the relationship. Co-expression of stathmin1 and Patched 1, a receptor for Hh signaling was observed in prostate cancer tissues. Cyclopamine and stathmin1 siRNA both decreased proliferation of prostate cancer cells but did not produce an additive effect, suggesting a common pathway. These results suggest that Hh signaling regulates proliferation of prostate cancer cells by controlling stathmin1 expression.
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- 2009
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26. A Study on Improvements in Summary Procedure
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Jae-Bong Kim, Young Soo Han, and Cho Gi Yeong
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- 2009
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27. The Revision Direction of the Provision related to Attempted Crime
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Jae-Bong Kim, Cheon-hyun Lee, and Ryu Chen Chel
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Law ,Sociology - Published
- 2009
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28. A study on the developing orientation of inner-city fishing port - Focusing on central Busan area
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Jae-Bong Kim
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Geography ,Inner city ,Fishing ,Economic geography ,Orientation (graph theory) ,Port (computer networking) - Published
- 2008
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29. Wnt7b is Upregulated in Macrophages during Thymic Regeneration and Negatively Regulated by RANKL
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Jae Bong Kim, Sik Yoon, Soo-Kyung Bae, Bong Seon Kim, Sung-Min Kim, and Jong Gab Kim
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medicine.medical_specialty ,biology ,Cyclophosphamide ,Activator (genetics) ,Wnt signaling pathway ,Cell biology ,Endocrinology ,Downregulation and upregulation ,RANKL ,Internal medicine ,Gene expression ,medicine ,biology.protein ,Involution (medicine) ,sense organs ,Receptor ,medicine.drug - Abstract
Thymus can regenerate to its normal mass within 14 days after acute involution induced by cyclophosphamide (CY) in adult rat. Despite the established role of Wnt pathways in the process of thymus development, they have not yet been associated with the regeneration of adult thymus. The purpose of this study was to investigate whether Wnt7b, which is expressed in developing thymic epithelial cells rather than in thymocytes, is modulated during thymic regeneration in adult rat. Here, we show that Wnt7b expression was up-regulated in the regenerating thymus. Cells immunolabeled for the Wnt7b were identified as macrophages. Furthermore, Wnt7b gene expression was decreased by the treatment of receptor activator of NF-kappaB ligand (RANKL). Taken together, our results demonstrate that Wnt7b gene expression was increased in macrophages during thymic regeneration and negatively regulated by RANKL.
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- 2007
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30. Cervicofacial Lymphatic Malformations: A Retrospective Review of 40 Cases
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Kang Young Choi, Jung Dug Yang, Jeong Woo Lee, Ho Yun Chung, Seung Huh, Yong-Sun Kim, Seok-Jong Lee, Jae Bong Kim, Byung Chae Cho, and Jongmin Lee
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medicine.medical_specialty ,Pathology ,medicine.medical_treatment ,lcsh:Surgery ,Disease ,Lesion ,03 medical and health sciences ,0302 clinical medicine ,Lymphangioma ,Sclerotherapy ,medicine ,Stage (cooking) ,030223 otorhinolaryngology ,Lymphatic abnormalities ,business.industry ,Incidence (epidemiology) ,Medical record ,Vascular malformation ,lcsh:RD1-811 ,medicine.disease ,030220 oncology & carcinogenesis ,Surgery ,Original Article ,Radiology ,medicine.symptom ,business - Abstract
Background Lymphatic malformation (LM) is a form of congenital vascular malformation with a low incidence. Although LM has been studied, no consensus has emerged regarding its cause or treatment. Methods In this study, we retrospectively evaluated 40 patients who visited our vascular anomalies center for the treatment of cervicofacial LM, which is a common manifestation of LM. The medical records of patients over a period of 12 years were reviewed and analyzed for commonalities regarding the diagnosis and the results of treatment. Results Suspected cervicofacial LM was confirmed through imaging studies. No difference in incidence was observed according to sex, and 73% of patients first presented with symptoms before the age of two years. The left side and the V2–V3 area were most commonly affected. No significant differences in incidence were observed among the macrocystic, microcystic, and combined types of LM. A total of 28 out of 36 patients received sclerotherapy as the first choice of treatment, regardless of the type of lesion. Complete resolution was achieved in only 25% of patients. Conclusions LM is important to confirm the diagnosis early and to choose an appropriate treatment strategy according to the stage of the disease and each individual patient's symptoms. When treatment is delayed or an incorrect treatment is administered, patient discomfort increases as the lesion gradually spreads. Therefore, more so than is the case for most other diseases, a team approach on a case-by-case basis is important for the accurate and appropriate treatment of LM.
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- 2015
31. Expression of Mucins in the Human Fetal and Neonatal Stomach
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Bong Seon Kim, Sachie Matsushita, Michiyo Higashi, Liying Su, Fusayoshi Murata, Shinichiro Tsuyama, Jae Bong Kim, Kazuhisa Hasui, Suguru Yonezawa, and Kazunobu Sueyoshi
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Pathology ,medicine.medical_specialty ,Histology ,Physiology ,Stomach ,Mucin ,Cell Biology ,Biology ,Biochemistry ,Pathology and Forensic Medicine ,medicine.anatomical_structure ,Human fetal ,medicine ,Immunohistochemistry - Published
- 2004
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32. Functional Anatomy of Korean Laryngeal Framework
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Sun-Yong Baek, Jung-Chul Suh, Moo-Jin Baek, Hwan-Jung Roh, Eui-Kyung Goh, Kang-Dae Lee, Bong-Sun Kim, Jin-Jung Kim, Soo-Geun Wang, Kyong-Myong Chon, and Jae-Bong Kim
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business.industry ,Functional anatomy ,Medicine ,Anatomy ,business - Published
- 1998
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33. Hedgehog Signaling Regulates the Survival of Gastric Cancer Cells by Regulating the Expression of Bcl-2
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Bong-Seon Kim, Sae-Ock Oh, Sun-Yong Baek, Myoung-Eun Han, Jae-Bong Kim, and Young-Suk Lee
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medicine.medical_specialty ,Cyclopamine ,Cell Survival ,Biology ,medicine.disease_cause ,Article ,Catalysis ,lcsh:Chemistry ,Inorganic Chemistry ,chemistry.chemical_compound ,Stomach Neoplasms ,Cell Line, Tumor ,Internal medicine ,medicine ,Humans ,gastric cancer ,hedgehog signaling ,apoptosis ,Bcl-2 ,Hedgehog Proteins ,Physical and Theoretical Chemistry ,lcsh:QH301-705.5 ,Molecular Biology ,Hedgehog ,Spectroscopy ,Cell Proliferation ,Cell growth ,Organic Chemistry ,Veratrum Alkaloids ,General Medicine ,Hedgehog signaling pathway ,Computer Science Applications ,Gene Expression Regulation, Neoplastic ,Endocrinology ,lcsh:Biology (General) ,lcsh:QD1-999 ,Proto-Oncogene Proteins c-bcl-2 ,chemistry ,Apoptosis ,Cancer cell ,Cancer research ,Signal transduction ,Carcinogenesis ,Signal Transduction - Abstract
Gastric cancer is the second most common cause of cancer deaths worldwide. The underlying molecular mechanisms of its carcinogenesis are relatively poorly characterized. Hedgehog (Hh) signaling, which is critical for development of various organs including the gastrointestinal tract, has been associated with gastric cancer. The present study was undertaken to reveal the underlying mechanism by which Hh signaling controls gastric cancer cell proliferation. Treatment of gastric cancer cells with cyclopamine, a specific inhibitor of Hh signaling pathway, reduced proliferation and induced apoptosis of gastric cancer cells. Cyclopamine treatment induced cytochrome c release from mitochondria and cleavage of caspase 9. Moreover, Bcl-2 expression was significantly reduced by cyclopamine treatment. These results suggest that Hh signaling regulates the survival of gastric cancer cells by regulating the expression of Bcl-2.
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- 2009
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34. Regulation of cerebrospinal fluid production by caffeine consumption
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Myoung-Eun Han, Jae-Bong Kim, Sae-Ock Oh, Sun-Yong Baek, Young-Suk Lee, Joo-Taek Choi, Sik Yoon, Hak-Jin Kim, Chul-Sik Pan, Dong-Hyun Kim, and Bong-Seon Kim
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Male ,medicine.medical_specialty ,Blotting, Western ,Biology ,lcsh:RC321-571 ,Cerebral Ventricles ,Rats, Sprague-Dawley ,chemistry.chemical_compound ,Cellular and Molecular Neuroscience ,Cerebrospinal fluid ,Theophylline ,Internal medicine ,Caffeine ,Gene expression ,medicine ,Animals ,lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry ,Cerebrospinal Fluid ,Receptor, Adenosine A1 ,General Neuroscience ,lcsh:QP351-495 ,medicine.disease ,Adenosine receptor ,Adenosine ,Immunohistochemistry ,Magnetic Resonance Imaging ,Rats ,lcsh:Neurophysiology and neuropsychology ,Endocrinology ,chemistry ,Cerebral blood flow ,Cerebrovascular Circulation ,Choroid Plexus ,Choroid plexus ,Sodium-Potassium-Exchanging ATPase ,medicine.drug ,Ventriculomegaly ,Research Article - Abstract
Background Caffeine is the most commonly consumed psycho-stimulant in the world. The effects of caffeine on the body have been extensively studied; however, its effect on the structure of the brain has not been investigated to date. Results In the present study we found that the long-term consumption of caffeine can induce ventriculomegaly; this was observed in 40% of the study rats. In the caffeine-treated rats with ventriculomegaly, there was increased production of CSF, associated with the increased expression of Na+, K+-ATPase and increased cerebral blood flow (CBF). In contrast to the chronic effects, acute treatment with caffeine decreased the production of CSF, suggesting 'effect inversion' associated with caffeine, which was mediated by increased expression of the A1 adenosine receptor, in the choroid plexus of rats chronically treated with caffeine. The involvement of the A1 adenosine receptor in the effect inversion of caffeine was further supported by the induction of ventriculomegaly and Na+, K+-ATPase, in A1 agonist-treated rats. Conclusion The results of this study show that long-term consumption of caffeine can induce ventriculomegaly, which is mediated in part by increased production of CSF. Moreover, we also showed that adenosine receptor signaling can regulate the production of CSF by controlling the expression of Na+, K+-ATPase and CBF.
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- 2009
35. RANKL stimulates proliferation, adhesion and IL-7 expression of thymic epithelial cells
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Chi Dae Kim, Jae Bong Kim, Bong Seon Kim, Yong Jin Na, Hee Woo Lee, Jeon-Ok Moon, Choong Won Lee, Junghoon Lee, Hye-Kyung Park, and Sik Yoon
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Male ,T cell ,Clinical Biochemistry ,bcl-X Protein ,Down-Regulation ,Vascular Cell Adhesion Molecule-1 ,Thymus Gland ,In Vitro Techniques ,Biochemistry ,Cell Line ,Mice ,Immune system ,medicine ,Cell Adhesion ,Animals ,Regeneration ,RNA, Messenger ,Cell adhesion ,Molecular Biology ,Cyclophosphamide ,Cell Proliferation ,bcl-2-Associated X Protein ,Thymic involution ,biology ,Receptor Activator of Nuclear Factor-kappa B ,Cell adhesion molecule ,Cell growth ,Interleukin-7 ,RANK Ligand ,Granulocyte-Macrophage Colony-Stimulating Factor ,Epithelial Cells ,Intercellular Adhesion Molecule-1 ,Cell biology ,Up-Regulation ,Mice, Inbred C57BL ,Thymocyte ,medicine.anatomical_structure ,RANKL ,biology.protein ,Molecular Medicine ,Original Article - Abstract
In many clinical situations which cause thymic involution and thereby result in immune deficiency, T cells are the most often affected, leading to a prolonged deficiency of T cells. Since only the thymic-dependent T cell production pathway secures stable regeneration of fully mature T cells, seeking strategies to enhance thymic regeneration should be a key step in developing therapeutic methods for the treatment of these significant clinical problems. This study clearly shows that receptor activator of NF-kappaB ligand (RANKL) stimulates mouse thymic epithelial cell activities including cell proliferation, thymocyte adhesion to thymic epithelial cells, and the expression of cell death regulatory genes favoring cell survival, cell adhesion molecules such as ICAM-1 and VCAM-1, and thymopoietic factors including IL-7. Importantly, RANKL exhibited a significant capability to facilitate thymic regeneration in mice. In addition, this study demonstrates that RANKL acts directly on the thymus to activate thymus regeneration regardless of its potential influences on thymic regeneration through an indirect or systemic effect. In light of this, the present study provides a greater insight into the development of novel therapeutic strategies for effective thymus repopulation using RANKL in the design of therapies for many clinical conditions in which immune reconstitution is required.
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- 2008
36. Up-regulation of VEGF expression by NGF that enhances reparative angiogenesis during thymic regeneration in adult rat
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Yun-Hee Bae, Hee-Jun Wee, Jong-Gab Kim, Soo-Kyung Bae, Sik Yoon, Jae-Bong Kim, Tae-Woo Kim, Hyun-Joo Park, Bong-Seon Kim, Mi Na Kim, and Moon-Kyoung Bae
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Male ,Vascular Endothelial Growth Factor A ,medicine.medical_specialty ,Angiogenesis ,Thymic Epithelial Cell ,Neovascularization, Physiologic ,Thymus Gland ,Biology ,Tropomyosin receptor kinase A ,Thymic Regeneration ,Neovascularization ,Rats, Sprague-Dawley ,chemistry.chemical_compound ,Neurotrophic factors ,Internal medicine ,Nerve Growth Factor ,medicine ,Animals ,Regeneration ,Involution (medicine) ,RNA, Messenger ,Receptor, trkA ,Fluorescent Antibody Technique, Indirect ,Molecular Biology ,Cyclophosphamide ,Cells, Cultured ,Fluorescent Dyes ,NGF ,Regeneration (biology) ,Angiography ,Proteins ,Cell Biology ,VEGF ,Immunohistochemistry ,Cell biology ,Rats ,Specific Pathogen-Free Organisms ,Up-Regulation ,Vascular endothelial growth factor ,Nerve growth factor ,Endocrinology ,chemistry ,medicine.symptom ,Fluorescein-5-isothiocyanate - Abstract
Angiogenesis is important for adult tissue regeneration as well as normal development. Vascular endothelial growth factor (VEGF) is a unique potent angiogenic factor, and plays an essential role in regulating angiogenesis during embryonic development, normal tissue growth, and tissue regeneration. Recent evidence shows that nerve growth factor (NGF) also plays a role as an angiogenic regulator as well as a well-known neurotrophic factor. The aim of this study was to investigate whether thymus regeneration accompanies reparative angiogenesis and also to evaluate whether the thymic expression of VEGF is regulated by NGF in vivo and in vitro. Here, we show that high VEGF mRNA and protein levels are concomitant with reparative angiogenesis that occurs dramatically during regeneration following acute involution induced by cyclophosphamide (CY) in the rat thymus. Fluorescent thymus angiography using FITC-dextran showed that thymic regeneration is associated with a much denser capillary network compared with normal control thymus. Furthermore, the expressions of NGF and TrkA were highly increased during thymic regeneration. We also show that NGF mediates thymic epithelial induction of VEGF expression in vitro and in vivo. Taken together, our results suggest that NGF-mediated VEGF up-regulation in thymic epithelial cells may contribute to reparative angiogenesis during thymic regeneration in adult.
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- 2007
37. Aspirin-induced blockade of NF-kappaB activity restrains up-regulation of glial fibrillary acidic protein in human astroglial cells
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Hee-Jun Wee, Hak-Joong Lee, Soo-Kyung Bae, Mi-Ae Yoo, Sun-Yong Baek, Sae-Ock Oh, Su-Ryun Kim, Sik-Yoon, Bong-Seon Kim, Moon-Kyoung Bae, and Jae-Bong Kim
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Transcription, Genetic ,A172 ,Down-Regulation ,macromolecular substances ,NF-κB ,Downregulation and upregulation ,Gene expression ,Glial Fibrillary Acidic Protein ,Tumor Cells, Cultured ,Humans ,RNA, Messenger ,Hypoxia ,Molecular Biology ,Messenger RNA ,Reporter gene ,Expression vector ,Glial fibrillary acidic protein ,biology ,Aspirin ,GFAP ,HBAs ,NF-kappa B ,Transfection ,Cell Biology ,GFAP stain ,Molecular biology ,Cell Hypoxia ,I-kappa B Kinase ,Up-Regulation ,nervous system ,Astrocytes ,biology.protein ,Reactive gliosis - Abstract
The marked induction of glial fibrillary acidic protein (GFAP) has been observed in astrocytes during neuropathological processes accompanying reactive gliosis; however, the precise molecular mechanism(s) underlying this GFAP induction remains poorly resolved. Therefore, in this study, we examined whether the change of nuclear factor-kappa B (NF-kappaB) activity can influence GFAP expression levels. Aspirin, widely used to prevent NF-kappaB activity, reduced the levels of GFAP mRNA and protein in human astroglial cells including human glioblastoma A172 cells and primary human brain astrocyte cells (HBAs). Furthermore, aspirin inhibited the effects of hypoxic injury on the up-regulation of GFAP expression in HBAs. We confirmed the repressive effect of aspirin on GFAP transcription by GFAP promoter-driven reporter assay and found that one NF-kappaB binding site conserved in the mouse and human GFAP gene promoters is critical for this effect. To further delineate whether NF-kappaB is directly involved in the regulation of GFAP gene expression, we transfected A172 cells with an expression vector encoding a super-repressor IkappaBalpha protein (IkappaBalpha-SR) to specifically inhibit NF-kappaB activity and found the marked reduction of GFAP protein levels in IkappaBalpha-SR-transfectant cells. Taken together, our results suggest that NF-kappaB may play pivotal roles in GFAP gene expression.
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- 2005
38. CDNA array analysis of gene expression profiles in brain of mice exposed to manganese
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Jae-Bong Kim, Sun-Yong Baek, Jae Woo Kim, Hyunju Kim, Cheol-In Yoo, Eul-Sun Kim, Choong-Ryeol Lee, Jiho Lee, Sik Yoon, Hun Lee, Yangho Kim, Jin-Hun Cho, Jungsun Park, and Bong-Seon Kim
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Male ,Neurofilament ,DNA, Complementary ,Health, Toxicology and Mutagenesis ,Protein subunit ,Substantia nigra ,Nerve Tissue Proteins ,Striatum ,Biology ,Mice ,Complementary DNA ,Gene expression ,medicine ,Animals ,Protein kinase A ,Oligonucleotide Array Sequence Analysis ,Manganese ,Gene Expression Profiling ,Neurodegeneration ,Public Health, Environmental and Occupational Health ,medicine.disease ,Molecular biology ,Immunohistochemistry ,Corpus Striatum ,Mice, Inbred C57BL ,Substantia Nigra - Abstract
This study is performed to detect changes of gene expression in substantia nigra (SN) and striatum in manganese (Mn)-exposed mice brain. The cDNA array is a recently developed molecular biological method that can detect the differential expression of several hundreds of genes simultaneously and is therefore advantageous in the study of trace metal intoxication effect at the genetic level. Using this technology, we discovered 5 genes in the mouse striatum and 9 genes in SN changed by more than 50% following Mn exposure. Depression were observed in two genes (neural cell adhesion protein BIG2, heavy neurofilament subunit genes) in striatum and three genes (light neurofilament subunit, brain acyl-CoA synthetase II, heavy neurofilament subunit genes) in the SN. However three genes (N-acetylglucosaminyltransferase I, S100beta, and synaptonemal complex protein I genes) in striatum and six genes (noggin, striatin, Ost oncogene, S100beta, calcium/calmodulin-dependent protein kinase kinase beta, and N-acetylglucosaminyltransferase I genes) in SN were elevated following Mn exposure. Immunohistochemical study revealed that protein levels of S100beta also increased following Mn treatment. Activated astrocytes overexpressing S100beta are invariably and intimately associated with decreased expression of heavy and light neurofilament subunits which is a distinguishing feature of neurodegeneration by Mn exposure. All our findings suggested that neuronal degenerations occur in SN as well as striatum of mice exposed to Mn.
- Published
- 2004
39. Cationic colloidal gold staining of acidic glycoconjugates in mouse Paneth cells
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Bong Seon Kim, Jun Ohmori, Dong-Hua Yang, Jae Bong Kim, Fusayoshi Murata, Shinichiro Tsuyama, and Ying Bin Ge
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Male ,Histology ,Glycoconjugate ,Gold Colloid ,law.invention ,symbols.namesake ,Mice ,law ,Ileum ,Microscopy ,Animals ,Intestinal Mucosa ,Fixative ,chemistry.chemical_classification ,Staining and Labeling ,Granule (cell biology) ,Golgi apparatus ,Staining ,Microscopy, Electron ,chemistry ,Biochemistry ,Cytoplasm ,symbols ,Biophysics ,Electron microscope ,Glycoconjugates - Abstract
The acidic glycoconjugates of mouse ileum Paneth cells were examined with the aid of light and electron microscopy, using cationic colloidal gold (CCG) as a probe. Specimens of mouse ilea were fixed in half-strength Karnovsky's fixative and embedded in Lowicryl K4M resin. Semithin and ultrathin sections were cut of examination with light and electron microscopy, respectively. Examination of the sections using light microscopy revealed the positive staining of CCG at pH 1.0 and pH 2.5, which was detected at the rim of secretory granules and at the supranuclear regions of the Paneth cells. At pH 4.0, in addition to staining of the secretory granule rim, weak staining was observed in the granule core. At pH 7.2, the cytoplasm other than secretory granules exhibited positive CCG staining. Examination of the sections using electron microscopy, at pH 1.0, the trans lamellae of the Golgi apparatus, the rim of the secretory granules, and lysosomes were labeled selectively by CCG. At pH 2.5, labeling was also discernible over the same structures in the cells. However, at this pH, the labeling intensity was stronger than that at pH 1.0, due to the dual labeling of sulfated and sialylated glycoconjugates in these structures. At pH 4.0, the Golgi apparatus, rims and cores of secretory granules and ribosomes were labeled. Lysosomes and nuclei were also positively stained. At pH 7.2, the rims of secretory granules were not stained. The present results indicate that the CCG method gives good resolution and contrast when applied to staining, and therefore is useful for the specific staining of glycoconjugates such as sulfated, sialylated and phosphated glycoconjugates for light and electron microscopy.
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- 1997
40. p190RhoGAP and Rap-dependent RhoGAP (ARAP3) inactivate RhoA in response to nerve growth factor leading to neurite outgrowth from PC12 cells
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Chan Young Jeon, Jae Bong Kim, Hee-Jun Kim, Sung Chan Kim, Jae-Yong Lee, and Jae Bong Park
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RHOA ,GTPase-activating protein ,Neurite ,Clinical Biochemistry ,Cell morphology ,PC12 Cells ,Biochemistry ,Nerve Growth Factor ,Neurites ,Animals ,Molecular Biology ,Adaptor Proteins, Signal Transducing ,Neurons ,biology ,Chemistry ,GTPase-Activating Proteins ,rap1 GTP-Binding Proteins ,Cell migration ,Rats ,Cell biology ,Repressor Proteins ,Nerve growth factor ,nervous system ,biology.protein ,Molecular Medicine ,Original Article ,Rap1 ,rhoA GTP-Binding Protein ,Proto-oncogene tyrosine-protein kinase Src - Abstract
Rat pheochromocytoma (PC12) cells have been used to investigate neurite outgrowth. Nerve growth factor (NGF) has been well known to induce neurite outgrowth from PC12 cells. RhoA belongs to Ras-related small GTP-binding proteins, which regulate a variety of cellular processes, including cell morphology alteration, actin dynamics, and cell migration. NGF suppressed GTP-RhoA levels after 12 h in PC12 cells and was consistently required for a long time to induce neurite outgrowth. Constitutively active (CA)-RhoA suppressed neurite outgrowth from PC12 cells in response to NGF, whereas dominant-negative (DN)-RhoA stimulated it, suggesting that RhoA inactivation is essential for neurite outgrowth. Here, we investigated the mechanism of RhoA inactivation. DN-p190RhoGAP abrogated neurite outgrowth, whereas wild-type (WT)-p190RhoGAP and WT-Src synergistically stimulated it along with accelerating RhoA inactivation, suggesting that p190RhoGAP, which can be activated by Src, is a major component in inhibiting RhoA in response to NGF in PC12 cells. Contrary to RhoA, Rap1 was activated by NGF, and DN-Rap1 suppressed neurite outgrowth, suggesting that Rap1 is also essential for neurite outgrowth. RhoA was co-immunoprecipitated with Rap1, suggesting that Rap1 interacts with RhoA. Furthermore, a DN-Rap-dependent RhoGAP (ARAP3) prevented RhoA inactivation, abolishing neurite formation from PC12 cells in response to NGF. These results suggest that NGF activates Rap1, which, in turn, up-regulates ARAP3 leading to RhoA inactivation and neurite outgrowth from PC12 cells. Taken together, p190RhoGAP and ARAP3 seem to be two main factors inhibiting RhoA activity during neurite outgrowth in PC12 cells in response to NGF.
- Published
- 2010
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41. Expression of 4-1BB and 4-1BBL in thymocytes during thymus regeneration
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Jae-Bong Kim, Beom K. Choi, Hee-Woo Lee, Sik Yoon, Seong-A Ju, Hye Kyung Kim, Hyo Jin Kim, Young-Tak Lim, Byoung S. Kwon, Young Mi Kim, and Bong-Seon Kim
- Subjects
CD4-Positive T-Lymphocytes ,Male ,T-Lymphocytes ,Cellular differentiation ,Clinical Biochemistry ,Population ,Thymus Gland ,CD8-Positive T-Lymphocytes ,Biology ,Biochemistry ,Cell Line ,Acute Thymic Involution ,Mice ,Tumor Necrosis Factor Receptor Superfamily, Member 9 ,Antigen ,Cell Adhesion ,Animals ,Regeneration ,RNA, Messenger ,Lymphopoiesis ,education ,Cyclophosphamide ,Molecular Biology ,Cells, Cultured ,education.field_of_study ,CD137 ,Cell Differentiation ,Epithelial Cells ,Molecular biology ,Mice, Inbred C57BL ,Thymocyte ,4-1BB Ligand ,Gene Expression Regulation ,Molecular Medicine ,Original Article ,Immunosuppressive Agents ,CD8 - Abstract
4-1BB, a member of the tumor necrosis factor receptor (TNFR) superfamily, is a major costimulatory receptor that is rapidly expressed on the surface of CD4(+) and CD8(+) T cells after antigen- or mitogen-induced activation. The interaction of 4-1BB with 4-1BBL regulates immunity and promotes the survival and expansion of activated T cells. In this study, the expression of 4-1BB and 4-1BBL was examined during regeneration of the murine thymus following acute cyclophosphamide- induced involution. Four-color flow cytometry showed that 4-1BB and 4-1BBL were present in the normal thymus and were preferentially expressed in the regenerating thymus, mainly in CD4(+)CD8(+) double-positive (DP) thymocytes. Furthermore, the CD4(lo)CD8(lo), CD4(+)CD8(lo) and CD4(lo)CD8(+) thymocyte subsets, representing stages of thymocyte differentiation intermediate between DP and single-positive (SP) thymocytes, also expressed 4-1BB and 4-1BBL during thymus regeneration but to a lesser degree. Interestingly, the 4-1BB and 4-1BBL positive cells among the CD4(+)CD8(+) DP thymocytes present during thymus regeneration were TCR(hi) and CD69(+) unlike the corresponding controls. Moreover, the 4-1BB and 4-1BBL positive cells among the intermediate subsets present during thymus regeneration also exhibited TCR(hi/int+) and CD69(+/int) phenotypes, indicating that 4-1BB and 4-1BBL are predominantly expressed by the positively selected population of the CD4(+)CD8(+) DP and the intermediate thymocytes during thymus regeneration. RT-PCR and Western blot analyses confirmed the presence and elevated levels of 4-1BB and 4-1BBL mRNA and protein in thymocytes during thymus regeneration. We also found that the interaction of 4-1BB with 4-1BBL promoted thymocyte adhesion to thymic epithelial cells. Our results suggest that 4-1BB and 4-1BBL participate in T lymphopoiesis associated with positive selection during recovery from acute thymic involution.
- Published
- 2009
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42. Hedgehog signaling regulates proliferation of prostate cancer cells via stathmin1.
- Author
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Moon-Kee Chung, Hyun-Jung Kim, Young-Suk Lee, Myoung-Eun Han, Sik Yoon, Sun-Yong Baek, Bong-Seon Kim, Jae-Bong Kim, and Sae-Ock Oh
- Subjects
PROSTATE cancer ,CANCER cell proliferation ,EMBRYOLOGY ,CARCINOGENESIS ,PROTEINS - Abstract
Hedgehog (Hh) signaling is an essential pathway in embryonic development of prostate. Hh also plays roles in the proliferation of progenitor cells and cancer cells of adult prostate. However, how Hh signaling contributes to carcinogenesis of prostate is poorly understood. Stathmin1 is a microtubule-regulating protein that plays an important role in the assembly and disassembly of the mitotic spindle. Stathmin1 is expressed in normal developing mouse prostate and in prostate cancer. The expression pattern of stathmin1 is similar to that of Shh in prostate development and cancer, suggesting a connection between these two proteins. In this study, we examined the relationship between stathmin1 and Hh signaling. Here, we show that stathmin1 expression is regulated by Hh signaling in prostate cancer cells. Cyclopamine, a specific inhibitor of Hh signaling, reduced the expression of stathmin1 in prostate cancer cells. However, the Shh peptide induced stathmin1 expression. Overexpression of Gli1 further confirmed the relationship. Co-expression of stathmin1 and Patched 1, a receptor for Hh signaling was observed in prostate cancer tissues. Cyclopamine and stathmin1 siRNA both decreased proliferation of prostate cancer cells but did not produce an additive effect, suggesting a common pathway. These results suggest that Hh signaling regulates proliferation of prostate cancer cells by controlling stathmin1 expression. [ABSTRACT FROM AUTHOR]
- Published
- 2010
- Full Text
- View/download PDF
43. Hedgehog Signaling Regulates the Survival of Gastric Cancer Cells by Regulating the Expression of Bcl-2.
- Author
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Myoung-Eun Han, Young-Suk Lee, Sun-Yong Baek, Bong-Seon Kim, Jae-Bong Kim, and Sae-Ock Oh
- Subjects
GASTROINTESTINAL cancer ,CANCER cells ,HEDGEHOG signaling proteins ,GENE expression ,CELL proliferation ,APOPTOSIS ,CELL death ,CYTOCHROMES ,MITOCHONDRIA ,PHYSIOLOGY - Abstract
Gastric cancer is the second most common cause of cancer deaths worldwide. The underlying molecular mechanisms of its carcinogenesis are relatively poorly characterized. Hedgehog (Hh) signaling, which is critical for development of various organs including the gastrointestinal tract, has been associated with gastric cancer. The present study was undertaken to reveal the underlying mechanism by which Hh signaling controls gastric cancer cell proliferation. Treatment of gastric cancer cells with cyclopamine, a specific inhibitor of Hh signaling pathway, reduced proliferation and induced apoptosis of gastric cancer cells. Cyclopamine treatment induced cytochrome c release from mitochondria and cleavage of caspase 9. Moreover, Bcl-2 expression was significantly reduced by cyclopamine treatment. These results suggest that Hh signaling regulates the survival of gastric cancer cells by regulating the expression of Bcl-2. [ABSTRACT FROM AUTHOR]
- Published
- 2009
- Full Text
- View/download PDF
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