1
|
Heo EJ, Kim M, Park CG, Chang KH, Kim KH, Shim JB, Park YJ, Kim CY, Lee NK, Lee S. The Feasibility of Fast, Four-Dimensional Computed Tomography-Based O-Ring Linac Plans for Stereotactic Body Radiotherapy in Patients with Poor Performance Status. Int J Radiat Oncol Biol Phys 2023; 117:e672. [PMID: 37785984 DOI: 10.1016/j.ijrobp.2023.06.2120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) As patients with poor performance status cannot endure long treatment times, it can lead to unplanned and prolonged radiation treatment or discontinuation of treatment. Moreover, prolonged radiation treatment appears to negatively affect survival for patients. We aimed to verify the feasibility of fast 4DCT-based O-ring linear accelerator (LINAC) treatment in lung 4D stereotactic body radiotherapy (SBRT). MATERIALS/METHODS This study included data of 38 patients who received lung 4D-SBRT. Gating20-70% plans were based on 4DCT data obtained at phase values ranging from 20-70% using a C-arm LINAC. Non-GatingFB plans were retrospectively established based on 4DCT data obtained at phase values of 0-90% using an O-ring LINAC. The prescribed dose of 4,800 cGy was delivered to PTV in four fractions. The conformity index (CI), homogeneity index (HI), and gradient measurement (GM) of the PTV were analyzed to compare dosimetric data between Gating20-70% and Non-GatingFB plans. Organs at risks (OARs) were analyzed in accordance with the RTOG 0915 protocol. Treatment delivery time and total monitor units (MU) were analyzed to compare the efficiency of treatment delivery. Statistical comparisons were performed using the Wilcoxon signed-rank test (p<0.05). RESULTS For the PTV, there was no significant difference in the CI or HI between Gating20-70% and Non-GatingFB plans (CI: 1.337±0.137, 1.335±0.174, HI: 0.939±0.015, 0.939±0.016, all at p>0.05). However, there was a significant difference in GM between Gating20-70% and Non-GatingFB plan (1.528±0.206 cm, 1.381±0.222 cm, p<0.001). For OARs, all plans met the criteria for dose constraint. There was a significant difference between Gating20-70% and Non-GatingFB plans except in the spinal cord. In particular, D1000cc and D1500cc values for the ipsilateral lung for Gating20-70% plans were 31.6% and 59.9% lower than those for Non-GatingFB plans (D1000cc: 50.780±132.061 cGy, 34.755±102.480 cGy, p<0.001, D1500cc: 6.641±14.598 cGy, 2.666±7.926 cGy, p<0.001). Treatment delivery time was 92% longer for Gating20-70% plans than for Non-GatingFB plans (5.0±0.4 min, 9.6±3.3 min, p = 0.043). The total MU value for Gating20-70% plans was 9.6% higher than that for Non-GatingFB plans (3665.8±230.7, 4016±236.9, p = 0.039). CONCLUSION When compared to OARs both plans were acceptable per RTOG-0915 protocol, but significant differences were between Non-GatingFB and Gating20-70% plans. However, treatment delivery time of Non-GatingFB plans decreased by 47.9% than Gating20-70% plans. We verified the feasibility of fast 4DCT-based O-ring LINAC treatment for patients who cannot endure long treatment times due to poor performance status in lung 4D-SBRT. In further study, we will analyze dosimetric differences and treatment delivery efficiency considering tumor motion according to tumor location.
Collapse
Affiliation(s)
- E J Heo
- Department of Radiation Oncology, College of Medicine, Korea University, Seoul, Korea, Republic of (South) Korea; Department of Bio-medical Science, Graduate School of Korea University, Sejong, Korea, Republic of (South) Korea
| | - M Kim
- Department of Biostatistics and Computing, Yonsei University Graduate school, Seoul, Korea, Republic of (South) Korea
| | - C G Park
- Department of Mathematics, Kyonggi University, Gyeonggi, Korea, Republic of (South) Korea
| | - K H Chang
- Department of Radiologic Science, Far East University, Chungcheongbuk-do, Korea, Republic of (South) Korea
| | - K H Kim
- Department of Neurosurgery, Ilsan Paik Hospital, College of Medicine, Inje University, Goyang, Korea, Republic of (South) Korea
| | - J B Shim
- Department of Radiation Oncology, Guro Hospital, Korea University Medical Center, Seoul, Korea, Republic of (South) Korea
| | - Y J Park
- Department of Radiation Oncology, College of Medicine, Korea University, Seoul, Korea, Republic of (South) Korea
| | - C Y Kim
- Department of Radiation Oncology, College of Medicine, Korea University, Seoul, Korea, Republic of (South) Korea
| | - N K Lee
- Department of Radiation Oncology, College of Medicine, Korea University, Seoul, Korea, Republic of (South) Korea
| | - S Lee
- Department of Radiation Oncology, College of Medicine, Korea University, Seoul, Korea, Republic of (South) Korea
| |
Collapse
|
2
|
Lee S, Han SW, Lee MR, Kim CY, Ha GW. The effect on incisional hernia of absorbable barbed suture for midline fascial closure in minimally invasive surgery for colorectal and gastric cancers: study protocol for a randomized controlled trial. Trials 2023; 24:311. [PMID: 37149610 PMCID: PMC10164296 DOI: 10.1186/s13063-023-07324-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 04/24/2023] [Indexed: 05/08/2023] Open
Abstract
BACKGROUND Incisional hernia following abdominal surgery is a frequent complication of midline laparotomy. This complication is strongly associated with the technique and material used for suture. While a monofilament absorbable suture is recommended to prevent incisional hernia, it can lead to suture loosening or surgical-knot breakage. Although barbed sutures can be an alternative suture material in abdominal fascial closure, evidence for its safety and effectiveness is lacking. Therefore, we designed a prospective randomized trial to evaluate the safety and efficacy of absorbable barbed sutures for midline fascia closure in minimally invasive surgery for colorectal and gastric cancers in comparison with conventional absorbable monofilament sutures. METHODS A total of 312 patients who underwent minimally invasive surgery for colorectal and gastric cancers will be randomly allocated to either the absorbable barbed or monofilament suture group for abdominal fascia closure in a 1:1 ratio. The primary outcome is incisional hernia rate within 3 years after surgery, as verified by physical examination and computed tomography. Postoperative complications, including surgical site infection, postoperative pain, and quality of life, will be compared between two groups as secondary outcomes. The investigator will examine the patients until discharge and at 6, 12, 18, 24, and 36 months postoperatively. DISCUSSION This is the first randomized controlled trial to compare absorbable barbed sutures with monofilament sutures for midline fascia closure in minimally invasive surgery. If absorbable barbed sutures demonstrate superior results to those of monofilament sutures, this type of suture material may be recommended as an alternative option for abdominal fascia closure. TRIAL REGISTRATION KCT0007069. Registered on January 30, 2023.
Collapse
Affiliation(s)
- Sejin Lee
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea
| | - Se Wung Han
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea
| | - Min Ro Lee
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea
| | - Chan-Young Kim
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea
| | - Gi Won Ha
- Research Institute of Clinical Medicine of Jeonbuk National University-Biomedical Research Institute of Jeonbuk National University Hospital, Jeonju, Republic of Korea.
- Department of Surgery, Jeonbuk National University Hospital, 20 Geonji-Ro, Deokjin-Gu, Jeonju, 54907, Republic of Korea.
| |
Collapse
|
3
|
Choi S, Min JS, Jeong SH, Yoo MW, Son YG, Oh SJ, Kim JH, Park JM, Hur H, Jee YS, Hwang SH, Jin SH, Lee SE, Lee YJ, Seo KW, Park S, Lee CM, Kim CH, Jeong IH, Lee HH, Choi SI, Lee SI, Kim CY, Chae H, Son MW, Pak KH, Kim S, Lee MS, Kim HI. Long-Term Survival Outcomes of Elderly Patients Treated With S-1 or Capecitabine Plus Oxaliplatin for Stage II or III Gastric Cancer: A Multicenter Cohort Study. J Gastric Cancer 2022; 22:67-77. [PMID: 35425655 PMCID: PMC8980600 DOI: 10.5230/jgc.2022.22.e6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 02/22/2022] [Accepted: 02/22/2022] [Indexed: 11/20/2022] Open
Abstract
Purpose Materials and Methods Results Conclusions
Collapse
Affiliation(s)
- Seohee Choi
- Department of Surgery, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Jae-Seok Min
- Department of Surgery, Dongnam Institute of Radiological and Medical Sciences, Cancer Center, Busan, Korea
| | - Sang-Ho Jeong
- Department of Surgery, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Moon-Won Yoo
- Department of Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Young-Gil Son
- Department of Surgery, Keimyung University Dongsan Hospital, Keimyung University School of Medicine, Daegu, Korea
| | - Sung Jin Oh
- Department of Surgery, Inje University Haeundae Paik Hospital, Inje University College of Medicine, Busan, Korea
| | - Jong-Han Kim
- Department of Surgery, Korea University College of Medicine, Seoul, Korea
| | - Joong-Min Park
- Department of Surgery, Chung-Ang University College of Medicine, Seoul, Korea
| | - Hoon Hur
- Department of Surgery, Ajou University School of Medicine, Suwon, Korea
| | - Ye Seob Jee
- Department of Surgery, Dankook University Hospital, Cheonan, Korea
| | - Sun-Hwi Hwang
- Department of Surgery, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Sung-Ho Jin
- Department of Surgery, Korea Cancer Center Hospital, Seoul, Korea
| | - Sang Eok Lee
- Department of Surgery, Konyang University Hospital, Daejeon, Korea
| | - Young-Joon Lee
- Department of Surgery, Gyeongsang National University School of Medicine, Jinju, Korea
| | - Kyung Won Seo
- Department of Surgery, Kosin University College of Medicine, Busan, Korea
| | - Sungsoo Park
- Department of Surgery, Korea University College of Medicine, Seoul, Korea
| | - Chang Min Lee
- Department of Surgery, Korea University College of Medicine, Seoul, Korea
| | | | - In Ho Jeong
- Department of Surgery, Jeju National University Hospital, Jeju, Korea
| | - Han Hong Lee
- Department of Surgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Sung Il Choi
- Department of Surgery, Kyung Hee University Hospital at Gangdong, Seoul, Korea
| | - Sang-Il Lee
- Department of Surgery, Chungnam National University College of Medicine, Daejeon, Korea
| | - Chan-Young Kim
- Department of Surgery, Jeonbuk National University College of Medicine, Jeonju, Korea
| | - Hyundong Chae
- Department of Surgery, Daegu Catholic University College of Medicine, Daegu, Korea
| | - Myoung-Won Son
- Department of Surgery, Soonchunhyang University Cheonan Hospital, Cheonan, Korea
| | - Kyung Ho Pak
- Department of Surgery, Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Korea
| | - Sungsoo Kim
- Department of Surgery, Jeju National University Hospital, Jeju, Korea
| | - Moon-Soo Lee
- Department of Surgery, Eulji University Hospital, Daejeon, Korea
| | - Hyoung-Il Kim
- Department of Surgery, Yonsei University College of Medicine, Seoul, Korea
| |
Collapse
|
4
|
Jang JH, Park S, An J, Choi JD, Seol IC, Park G, Lee SH, Moon Y, Kang W, Jung ES, Cha JY, Kim CY, Kim S, Jung IC, Yoo H. Gait Disturbance Improvement and Cerebral Cortex Rearrangement by Acupuncture in Parkinson's Disease: A Pilot Assessor-Blinded, Randomized, Controlled, Parallel-Group Trial. Neurorehabil Neural Repair 2020; 34:1111-1123. [PMID: 33198568 DOI: 10.1177/1545968320969942] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
BACKGROUND Parkinson's disease (PD) leads to impaired mobility and limited independence. OBJECTIVE We investigated the effects of acupuncture on gait disturbance and analyzed hemodynamic changes caused by acupuncture in the cerebral cortex of patients with PD. METHODS Participants (n = 26) with gait disturbance due to PD were randomly assigned to the intervention (acupuncture twice a week for 4 weeks + conventional therapy) or control (conventional therapy) groups. We analyzed gait parameters using the GAITRite system and hemodynamic responses in the cerebral cortices using functional near-infrared spectroscopy, Unified Parkinson's Disease Rating Scale (UPDRS) scores, neurotransmitter levels, as well as the immediate effects of acupuncture in patients with PD. RESULTS The participants tended to walk with hypometric gait (high cadence, short steps) overground. After acupuncture treatment, those in the intervention group showed a significant reduction in cadence and the UPDRS scores involving "walking and balance" compared with those in the control group (P = .004 and P = .020, respectively); the stride, swing, and single support times were significantly increased (P = .006, P = .001, and P = .001, respectively). Oxyhemoglobin levels in the intervention group while walking on a treadmill were significantly increased in the prefrontal and supplementary motor areas. The oxyhemoglobin levels in the prefrontal cortex and swing time revealed significant positive correlations. CONCLUSIONS Our findings indicated that acupuncture tended to improve hypometric gait and rearranged activation of the cerebral cortex. Thus, acupuncture may be a useful complementary treatment for gait disturbance, including hypometric gait, in patients with PD. Trial Registration Number. Clinical Research Information Service (KCT0002603), https://cris.nih.go.kr/cris/index.jsp.
Collapse
Affiliation(s)
- Jung-Hee Jang
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea.,Korea Institute of Oriental Medicine, Daejeon, Republic of Korea
| | - Sangsoo Park
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| | - Jinung An
- Convergence Research Center for Wellness, Digist R4-814, Dalseong-Gun, Daegu, Republic of Korea
| | - Jong-Duk Choi
- College of Health & Medical Science, Graduate School, Daejeon City, Republic of Korea
| | - In Chan Seol
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| | - Gunhyuk Park
- Korea Institute of Oriental Medicine, Naju-si, Jeollanam-do, Republic of Korea
| | | | - Young Moon
- College of Health & Medical Science, Graduate School, Daejeon City, Republic of Korea
| | - Weechang Kang
- Daejeon University, Dong-gu, Daejeon City, Republic of Korea
| | - Eun-Sun Jung
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| | - Ji-Yun Cha
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| | - Chan-Young Kim
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| | - Siyeon Kim
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| | - In Chul Jung
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| | - Horyong Yoo
- Dunsan Korean Medicine Hospital, Seo-gu, Daejeon, Republic of Korea
| |
Collapse
|
5
|
Oh HJ, Yang D, Oh HW, Jeon JG, Kim C, Ahn JY, Han SW, Kim CY. Chronologic trends of cancer-related lymph node research in PubMed: informetrics analysis. Ann Surg Treat Res 2020; 99:305-313. [PMID: 33163460 PMCID: PMC7606126 DOI: 10.4174/astr.2020.99.5.305] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/01/2020] [Accepted: 07/29/2020] [Indexed: 02/06/2023] Open
Abstract
Purpose Given the long history of investigation into cancer and its relevance to the lymph node (LN), it would be meaningful to plot the trends of research on cancer-related LN. Methods Queries such as “cancer,” “lymph node,” and “cancer and lymph node” were submitted to PubMed to collect articles on cancer and LN published between 1945 and 2017. The collected articles were then extracted by an automatic web crawler and examined through informetrics and linguistic analysis. Results The number of articles related to cancer was 2,795,476 and 127,897 articles (4.6%) were found to be relevant to LN. With regard to cancer types, breast cancer was the most studied (37%), followed by gastric cancer (17%). With regard to the subjects in which the surgeon is interested, LN metastasis (57%) was found to be the topic most discussed, followed by LN dissection (22%) and sentinel LN (17%). Publications on LN metastasis gradually increased over time from 1988 to 2017 although those on sentinel LN and LN dissection have stagnated since the early 2000s. Conclusion Although research on cancer was abundant, only a small portion was dedicated to investigating its relevance to LN. Western countries had led the research on cancer-related LN, but Asian countries began to participate as major players, expanding their contributions. While LN metastasis, one of the major cancer-related LN topics, showed a steady increase, those involved in oncologic surgery such as LN dissection and sentinel LN did not.
Collapse
Affiliation(s)
- Hyo-Jung Oh
- Department of Library and Information Science, Jeonbuk National University, Jeonju, Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Korea
| | - Dongmin Yang
- Graduate School of Archives and Records Management, Jeonbuk National University, Jeonju, Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Korea
| | - Hyo-Won Oh
- Department of Preventive and Public Health Dentistry, College of Dentistry, Wonkwang University, Iksan, Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Korea
| | - Jae-Gyu Jeon
- Department of Preventive Dentistry, School of Dentistry, BK21 Program, Jeonbuk National University, Jeonju, Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Korea
| | - Chonghyuck Kim
- Department of English Language and Literature, Jeonbuk National University, Jeonju, Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Korea
| | - Jeong-Yong Ahn
- Department of Statistics, Jeonbuk National University, Jeonju, Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Korea
| | - Se Wung Han
- Department of Surgery, Jeonbuk National University Medical School, Jeonju, Korea
| | - Chan-Young Kim
- Department of Surgery, Jeonbuk National University Medical School, Jeonju, Korea.,Research Institute of Clinical Medicine of Jeonbuk National University, Jeonju, Korea.,Institute of Medical Information Convergence Research in JBNU, Jeonju, Korea
| |
Collapse
|
6
|
Yoo HR, Seol IC, Cha JY, Jung ES, Kim CY, Chae IC, Park SS, Lee SW, Baek YH. The Cohort Study Analysis of Correlation between Cold-Heat Patterns and Various Factors. Advances in Integrative Medicine 2019. [DOI: 10.1016/j.aimed.2019.03.341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
7
|
Toms SA, Kim CY, Nicholas G, Ram Z. Increased compliance with tumor treating fields therapy is prognostic for improved survival in the treatment of glioblastoma: a subgroup analysis of the EF-14 phase III trial. J Neurooncol 2019; 141:467-473. [PMID: 30506499 PMCID: PMC6342854 DOI: 10.1007/s11060-018-03057-z] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 11/21/2018] [Indexed: 01/22/2023]
Abstract
BACKGROUND Tumor treating fields (TTFields) is a non-invasive, antimitotic therapy. In the EF-14 phase 3 trial in newly diagnosed glioblastoma, TTFields plus temozolomide (TTFields/TMZ) improved progression free (PFS) and overall survival (OS) versus TMZ alone. Previous data indicate a ≥ 75% daily compliance improves outcomes. We analyzed compliance data from TTFields/TMZ patients in the EF-14 study to correlate TTFields compliance with PFS and OS and identify potential lower boundary for compliance with improved clinical outcomes. METHODS Compliance was assessed by usage data from the NovoTTF-100A device and calculated as percentage per month of TTFields delivery. TTFields/TMZ patients were segregated into subgroups by percent monthly compliance. A Cox proportional hazard model controlled for sex, extent of resection, MGMT methylation status, age, region, and performance status was used to investigate the effect of compliance on PFS and OS. RESULTS A threshold value of 50% compliance with TTFields/TMZ improved PFS (HR 0.70, 95% CI 0.47-1.05) and OS (HR 0.67, 95% CI 0.45-0.99) versus TMZ alone with improved outcome as compliance increased. At compliance > 90%, median survival was 24.9 months (28.7 months from diagnosis) and 5-year survival rate was 29.3%. Compliance was independent of gender, extent of resection, MGMT methylation status, age, region and performance status (HR 0.78; p = 0.031; OS at compliance ≥ 75% vs. < 75%). CONCLUSION A compliance threshold of 50% with TTFields/TMZ correlated with significantly improved OS and PFS versus TMZ alone. Patients with compliance > 90% showed extended median and 5-year survival rates. Increased compliance with TTFields therapy is independently prognostic for improved survival in glioblastoma.
Collapse
Affiliation(s)
- S A Toms
- Department of Neurosurgery, Warren Alpert Medical School of Brown University, Providence, RI, USA.
| | - C Y Kim
- Seoul National University, Bundang, South Korea
| | - G Nicholas
- Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Z Ram
- Tel Aviv Medical Center, Tel Aviv, Israel
| |
Collapse
|
8
|
Oh HJ, Kim CY. Non-Exposure Endoscopic-Laparoscopic Cooperative Surgery for Stomach Tumors. Clin Endosc 2018; 51:113-114. [PMID: 29558792 PMCID: PMC5903077 DOI: 10.5946/ce.2018.048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 03/13/2018] [Accepted: 03/13/2018] [Indexed: 12/17/2022] Open
Affiliation(s)
- Hyo-Jung Oh
- Graduate School of Archives and Records Management, Chonbuk National University, Jeonju, Korea
- Division of Gastrointestinal Surgery, Department of Surgery, Chonbuk National University Medical School, Jeonju, Korea
| | - Chan-Young Kim
- Division of Gastrointestinal Surgery, Department of Surgery, Chonbuk National University Medical School, Jeonju, Korea
- Institute of Medical Information Convergence Research in CBNU, Jeonju, Korea
| |
Collapse
|
9
|
Yoon JH, Gwak GY, Woo GH, Kim TH, Kim KA, Kim CY, Lee HS. Augmentation of Butyrate-induced Differentiation of Human Hepatocyte by Cyclin E Over-expression. Int J Artif Organs 2018; 28:44-50. [PMID: 15742309 DOI: 10.1177/039139880502800108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
In mammalian cells, cellular differentiation into specific cell types is usually preceded by growth arrest. On the other hand, the induced differentiation may also be preceded by an enhanced G1–S transition of the cell cycle prior to the growth arrest. This suggests that an early increase in proliferation is in some way a prerequisite for subsequent differentiation. We therefore attempted to assess whether we could produce human hepatocytes with further differentiated functions by promoting G1-S transition in a butyrate-treated human hepatocyte cell line. A cyclin E-over-expressing cell line was established by transfecting human cyclin E cDNA. Upon butyrate treatment, the cyclin E-over-expressing cells exhibited a significantly increased albumin-secreting and ammonia-detoxifying capacity when compared to the control cells. In particular, the ornithine transcarbamylase activity was increased in these cells. Collectively, these results implicate that the cyclin E over-expression may augment the hepatocyte-specific functions during the butyrate-induced differentiation process of human hepatocytes by enhancing G1-S cell cycle transition.
Collapse
Affiliation(s)
- J-H Yoon
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|
10
|
Hong SH, Lee WJ, Kim YD, Kim H, Jeon YJ, Lim B, Cho DH, Heo WD, Yang DH, Kim CY, Yang HK, Yang JK, Jung YK. APIP, an ERBB3-binding partner, stimulates erbB2-3 heterodimer formation to promote tumorigenesis. Oncotarget 2017; 7:21601-17. [PMID: 26942872 PMCID: PMC5008309 DOI: 10.18632/oncotarget.7802] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 02/20/2016] [Indexed: 01/07/2023] Open
Abstract
Despite the fact that the epidermal growth factor (EGF) family member ERBB3 (HER3) is deregulated in many cancers, the list of ERBB3-interacting partners remains limited. Here, we report that the Apaf-1-interacting protein (APIP) stimulates heregulin-β1 (HRG-β1)/ERBB3-driven cell proliferation and tumorigenesis. APIP levels are frequently increased in human gastric cancers and gastric cancer-derived cells. Cell proliferation and tumor formation are repressed by APIP downregulation and stimulated by its overexpression. APIP's role in the ERBB3 pathway is not associated with its functions within the methionine salvage pathway. In response to HRG-β1, APIP binds to the ERBB3 receptor, leading to an enhanced binding of ERBB3 and ERBB2 that results in sustained activations of ERK1/2 and AKT protein kinases. Furthermore, HRG-β1/ERBB3-dependent signaling is gained in APIP transgenic mouse embryonic fibroblasts (MEFs), but not lost in Apip−/− MEFs. Our findings offer compelling evidence that APIP plays an essential role in ERBB3 signaling as a positive regulator for tumorigenesis, warranting future development of therapeutic strategies for ERBB3-driven gastric cancer.
Collapse
Affiliation(s)
- Se-Hoon Hong
- School of Biological Science, Seoul National University, Gwanak-gu, Seoul 151-747, Korea
| | - Won Jae Lee
- School of Biological Science, Seoul National University, Gwanak-gu, Seoul 151-747, Korea
| | - Young Doo Kim
- School of Biological Science, Seoul National University, Gwanak-gu, Seoul 151-747, Korea
| | - Hyunjoo Kim
- School of Biological Science, Seoul National University, Gwanak-gu, Seoul 151-747, Korea
| | - Young-Jun Jeon
- School of Biological Science, Seoul National University, Gwanak-gu, Seoul 151-747, Korea
| | - Bitna Lim
- School of Biological Science, Seoul National University, Gwanak-gu, Seoul 151-747, Korea
| | - Dong-Hyung Cho
- Graduate School of East-West Medical Science, Kyung Hee University, Gyeoggi-Do 446-701, Korea
| | - Won Do Heo
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
| | - Doo-Hyun Yang
- Department of Surgery, Chonbuk National University Medical School, Jeonju 561-180, Korea
| | - Chan-Young Kim
- Department of Surgery, Chonbuk National University Medical School, Jeonju 561-180, Korea
| | - Han-Kwang Yang
- Department of Surgery, Seoul National University College of Medicine, Seoul 110-744, Korea
| | - Jin Kuk Yang
- Department of Chemistry, College of Natural Sciences, Soongsil University, Seoul 156-743, Korea
| | - Yong-Keun Jung
- School of Biological Science, Seoul National University, Gwanak-gu, Seoul 151-747, Korea
| |
Collapse
|
11
|
Griffin AS, Preece SR, Ronald J, Smith TP, Suhocki PV, Kim CY. Hemorrhage risk with transjugular intrahepatic portosystemic shunt (TIPS) insertion at the main portal vein bifurcation with stent grafts. Diagn Interv Imaging 2017; 98:837-842. [PMID: 28843589 DOI: 10.1016/j.diii.2017.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 07/20/2017] [Accepted: 07/20/2017] [Indexed: 02/07/2023]
Abstract
PURPOSE The purpose of this study was to assess the incidence of major hemorrhage after transjugular intrahepatic portosystemic shunt (TIPS) insertion using a stent graft at the main portal vein bifurcation. PATIENTS AND METHODS TIPS insertion using stent grafts was performed in 215 patients due to non-variceal hemorrhage indications. There were 137 men and 78 women, with a mean age of 57 years±10.6 (SD) (range: 19-90 years). Based on retrospective review of portal venograms, TIPS inserted within 5mm from the portal vein bifurcation were considered "bifurcation TIPS", while those inserted 2cm or greater from the bifurcation were considered intrahepatic. Suspicion for acute major periprocedural hemorrhage were categorized as low, moderate, and high, based on the number of signs of hemorrhage. RESULTS Of 215 TIPS inserted for purposes other than hemorrhage, the TIPS was inserted at the portal bifurcation in 41 patients (29 men, 12 women; mean age, 55.9±11.7 (SD); range: 26-79 years) and intrahepatic in 62 patients (37 men, 25 women; mean age, 57.6±10.6 (SD), range: 34-82 years), whereas 112 were indeterminate in location. No active extravasations were identified on post-TIPS portal venograms. Suspicion for acute major hemorrhage was moderate or high in 3/41 (7%) of patients in the TIPS bifurcation group compared to 5/62 (8%) in the intrahepatic TIPS group (P>0.99). There were no significant differences in 30-day mortality rates (1/41 [2%] and 3/62 [5%] respectively; P> 0.99). No deaths or interventions were attributed to acute hemorrhage. CONCLUSION TIPS insertion at the portal bifurcation with stent grafts did not incur an elevated risk of hemorrhagic complications.
Collapse
Affiliation(s)
- A S Griffin
- Division of Vascular & Interventional Radiology, Department of Radiology, Duke University Medical Center, 2311, Erwin Road, 27710 Durham, NC, United States
| | - S R Preece
- Vascular Institute, Teton Radiology, Idaho Falls, ID, United States
| | - J Ronald
- Division of Vascular & Interventional Radiology, Department of Radiology, Duke University Medical Center, 2311, Erwin Road, 27710 Durham, NC, United States
| | - T P Smith
- Division of Vascular & Interventional Radiology, Department of Radiology, Duke University Medical Center, 2311, Erwin Road, 27710 Durham, NC, United States
| | - P V Suhocki
- Division of Vascular & Interventional Radiology, Department of Radiology, Duke University Medical Center, 2311, Erwin Road, 27710 Durham, NC, United States
| | - C Y Kim
- Division of Vascular & Interventional Radiology, Department of Radiology, Duke University Medical Center, 2311, Erwin Road, 27710 Durham, NC, United States.
| |
Collapse
|
12
|
Chae MR, Kang SJ, Lee KP, Choi BR, Kim HK, Park JK, Kim CY, Lee SW. Onion (Allium cepa L.) peel extract (OPE) regulates human sperm motility via protein kinase C-mediated activation of the human voltage-gated proton channel. Andrology 2017; 5:979-989. [PMID: 28805023 DOI: 10.1111/andr.12406] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 06/13/2017] [Accepted: 06/27/2017] [Indexed: 01/14/2023]
Abstract
Onion (Allium cepa L.) and quercetin protect against oxidative damage and have positive effects on multiple functional parameters of spermatozoa, including viability and motility. However, the associated underlying mechanisms of action have not yet been identified. The aim of this study was to investigate the effect of onion peel extract (OPE) on voltage-gated proton (Hv1) channels, which play a critical role in rapid proton extrusion. This process underlies a wide range of physiological processes, particularly male fertility. The whole-cell patch-clamp technique was used to record the changes in Hv1 currents in HEK293 cells transiently transfected with human Hv1 (HVCN1). The effects of OPE on human sperm motility were also analyzed. OPE significantly activated the outward-rectifying proton currents in a concentration-dependent manner, with an EC50 value of 30 μg/mL. This effect was largely reversible upon washout. Moreover, OPE induced an increase in the proton current amplitude and decreased the time constant of activation at 0 mV from 4.9 ± 1.7 to 0.6 ± 0.1 sec (n = 6). In the presence of OPE, the half-activation voltage (V1/2 ) shifted in the negative direction, from 20.1 ± 5.8 to 5.2 ± 8.7 mV (n = 6), but the slope was not significantly altered. The OPE-induced current was profoundly inhibited by 10 μm Zn2+ , the most potent Hv1 channel inhibitor, and was also inhibited by treatment with GF109203X, a specific protein kinase C (PKC) inhibitor. Furthermore, sperm motility was significantly increased in the OPE-treated groups. OPE exhibits protective effects on sperm motility, at least partially via regulation of the proton channel. Moreover, similar effects were exerted by quercetin, the major flavonoid in OPE. These results suggest OPE, which is rich in the potent Hv1 channel activator quercetin, as a possible new candidate treatment for human infertility.
Collapse
Affiliation(s)
- M R Chae
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S J Kang
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - K P Lee
- Laboratory of Physiology, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - B R Choi
- Department of Urology, Medical School and Institute for Medical Sciences, Chonbuk National University, Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University Hospital, Jeonju, Korea
| | - H K Kim
- College of Pharmacy, Kyungsung University, Busan, Korea
| | - J K Park
- Department of Urology, Medical School and Institute for Medical Sciences, Chonbuk National University, Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University Hospital, Jeonju, Korea
| | - C Y Kim
- College of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Korea
| | - S W Lee
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| |
Collapse
|
13
|
Choo SH, Lee SW, Chae MR, Kang SJ, Sung HH, Han DH, Chun JN, Park JK, Kim CY, Kim HK, So I. Effects of eupatilin on the contractility of corpus cavernosal smooth muscle through nitric oxide-independent pathways. Andrology 2017; 5:1016-1022. [PMID: 28719725 DOI: 10.1111/andr.12397] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 05/26/2017] [Accepted: 06/09/2017] [Indexed: 12/19/2022]
Abstract
Eupatilin (5,7-dihydroxy-3,4,6-trimethoxyflavone) is one of the main compounds present in Artemisia species. Eupatilin has both antioxidative and anti-inflammatory properties and a relaxation effect on vascular contraction regardless of endothelial function. We evaluated the relaxant effects of eupatilin on the corpus cavernosum (CC) of rabbits and the underlying mechanisms of its activity in human corpus cavernosum smooth muscle (CCSM) cells. Isolated rabbit CC strips were mounted in an organ bath system. A conventional whole-cell patch clamp technique was used to measure activation of calcium-sensitive K+ -channel currents in human CCSM cells. The relaxation effect of eupatilin was evaluated by cumulative addition (10-5 m ~ 3 × 10-4 m) to CC strips precontracted with 10-5 m phenylephrine. Western blotting analysis was performed to measure myosin phosphatase targeting subunit 1 (MYPT1) and protein kinase C-potentiated inhibitory protein for heterotrimeric myosin light chain phosphatase of 17-kDa (CPI-17) expression and to evaluate the effect of eupatilin on the RhoA/Rho-kinase pathway. Eupatilin effectively relaxed the phenylephrine-induced tone in the rabbit CC strips in a concentration-dependent manner with an estimated EC50 value of 1.2 ± 1.6 × 10-4 m (n = 8, p < 0.05). Iberiotoxin and tetraethylammonium significantly reduced the relaxation effect (n = 8, p < 0.001 and p = 0.003, respectively). Removal of the endothelium or the presence of L-NAME or indomethacin did not affect the relaxation effect of eupatilin. In CCSM cells, the extracellular application of eupatilin 10-4 m significantly increased the outward currents, and the eupatilin-stimulated currents were significantly attenuated by treatment with 10-7 m iberiotoxin (n = 13, p < 0.05). Eupatilin reduced the phosphorylation level of MYPT1 at Thr853 of MLCP and CPI-17 at Thr38. Eupatilin-induced relaxation of the CCSM cells via NO-independent pathways. The relaxation effects of eupatilin on CCSM cells were partially due to activation of BKCa channels and inhibition of RhoA/Rho-kinase.
Collapse
Affiliation(s)
- S H Choo
- Department of Urology, Ajou University School of Medicine, Suwon, Korea
| | - S W Lee
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - M R Chae
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - S J Kang
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - H H Sung
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - D H Han
- Department of Urology, Samsung Medical Center, Samsung Biomedical Research Institute, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - J N Chun
- Department of Physiology and Biomedical Sciences, Seoul National University College of Medicine, Seoul, Korea
| | - J K Park
- Department of Urology, Institute for Medical Sciences, Medical School, Chonbuk National University, Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University Hospital, Jeonju, Korea
| | - C Y Kim
- College of Pharmacy and Institute of Pharmaceutical Science and Technology, Hanyang University, Ansan, Korea
| | - H K Kim
- College of Pharmacy, Kyungsung University, Busan, Korea
| | - I So
- Department of Physiology, Seoul National University College of Medicine, Seoul, Korea
| |
Collapse
|
14
|
Oh HJ, Oh HW, Lee DW, Kim CH, Ahn JY, Kim Y, Shin HB, Kim CY, Park SH, Jeon JG. Chronologic Trends in Studies on Fluoride Mechanisms of Action. J Dent Res 2017; 96:1353-1360. [PMID: 28657808 DOI: 10.1177/0022034517717680] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Fluoride has been widely used for the prevention of dental caries since the mid-20th century. The aim of this study was to investigate the chronologic trends in studies on fluoride mechanisms of action against dental caries during the years 1950 to 2015. To this aim, queries such as "fluoride," "fluoride and demineralization," "fluoride and remineralization," "fluoride and (plaque or biofilms)," and "fluoride and (bacteria or microbials)" were submitted to PubMed to collect research article information, including titles, abstracts, publication dates, author affiliations, and publication journals. The article information that PubMed produced was then collected by an automatic web crawler and examined through informetrics and linguistic analyses. We found that the number of articles concerned with fluoride mechanisms of action against dental caries was 6,903 and gradually increased over time during the years 1950 to 2015. They were published by 1,136 journals-most notably, Caries Research and Journal of Dental Research. Of the articles published, those related to bacteria/microbials had a higher percentage (44%) than those dealing with plaque/biofilms, demineralization, and remineralization. With regard to the geographic distribution of authors, Europe and North America accounted for 65% of the articles during the years 1987 to 2015, although the number of authors in Asia sharply increased in recent years. Among the fluoride compounds, NaF was mentioned more frequently than SnF2, Na2PO3F, amine fluoride, and acidulated phosphate fluoride during the years 1986 to 2015. Water fluoridation received the most attention among the various fluoride application methods (toothpastes, mouthwashes, fluoride varnishes, and fluoride gels) during the same period. These results, obtained from employing informetrics and linguistic analyses, suggest that in studies on fluoride mechanisms of action, 1) the unbalanced geographic distribution of articles and 2) the heavy concentration of articles on particular fluoride compounds and application methods should be overcome in future research.
Collapse
Affiliation(s)
- H J Oh
- 1 Graduate School of Archives and Records Management, Chonbuk National University, Jeonju, Republic of Korea.,2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea
| | - H W Oh
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,3 Department of Preventive & Public Health Dentistry, College of Dentistry, Wonkwang University, Iksan, Republic of Korea
| | - D W Lee
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,4 Department of Preventive Dentistry, School of Dentistry, BK21 Program, Chonbuk National University, Jeonju, Republic of Korea
| | - C H Kim
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,5 Department of English Language and Literature, Chonbuk National University, Jeonju, Republic of Korea
| | - J Y Ahn
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,6 Department of Statistics, Chonbuk National University, Jeonju, Republic of Korea
| | - Y Kim
- 1 Graduate School of Archives and Records Management, Chonbuk National University, Jeonju, Republic of Korea.,2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea
| | - H B Shin
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,7 Department of Surgery, Medical School, Chonbuk National University, Jeonju, Republic of Korea
| | - C Y Kim
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,7 Department of Surgery, Medical School, Chonbuk National University, Jeonju, Republic of Korea
| | - S H Park
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,8 Department of Rehabilitation Medicine, Medical School, Chonbuk National University, Jeonju, Republic of Korea
| | - J G Jeon
- 2 Institute of Medical Information Convergence Research, Chonbuk National University, Jeonju, Republic of Korea.,4 Department of Preventive Dentistry, School of Dentistry, BK21 Program, Chonbuk National University, Jeonju, Republic of Korea
| |
Collapse
|
15
|
Kang SY, Park HS, Kim CY. Prognostic significance of intraoperative macroscopic serosal invasion finding when it shows a discrepancy in pathologic result gastric cancer. Ann Surg Treat Res 2016; 90:250-6. [PMID: 27186569 PMCID: PMC4865702 DOI: 10.4174/astr.2016.90.5.250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 01/28/2016] [Accepted: 03/02/2016] [Indexed: 12/29/2022] Open
Abstract
Purpose Depth of wall invasion is an important prognostic factor in patients with gastric cancer, whereas the prognostic significance of intraoperative macroscopic serosal invasion (mSE) findings remain unclear when they show a discrepancy in pathologic findings. This study, therefore, assessed the prognostic significance of mSE. Methods Data from cohort of 2,835 patients with resectable gastric cancer who underwent surgery between 1990 and 2010 were retrospectively reviewed. Results The overall accuracy of mSE and pathologic results was 83.4%. The accuracy of mSE was 75.5% in pT2. On the other hand, the accuracy of pT3 dropped to 24.5%. According to mSE findings (+/–), the 5-year disease-specific survival (DSS) rate differed significantly in patients with pT2 (+; 74.2% vs. –; 92.0%), pT3 (+; 76.7% vs. –; 91.8%) and pT4a (+; 51.3% vs. –; 72.8%) (P < 0.001 each), but not in patients with T1 tumor. Multivariate analysis showed that mSE findings (hazard ratio [HR], 2.275; 95% confidence interval [CI], 1.148–4.509), tumor depth (HR, 6.894; 95% CI, 2.325–20.437), nodal status (HR, 5.206; 95% CI, 2.298–11.791), distant metastasis (HR, 2.881; 95% CI, 1.388–6.209), radical resection (HR, 2.002; 95% CI, 1.017–3.940), and lymphatic invasion (HR, 2.713; 95% CI, 1.424–5.167) were independent predictors of 5-year DSS rate. Conclusion We observed considerable discrepancies between macroscopic and pathologic diagnosis of serosal invasion. However, macroscopic diagnosis of serosal invasion was independently prognostic of 5-year DSS. It suggests that because the pathologic results could not be perfect and the local inflammatory change with mSE(+) could affect survival, a combination of mSE(+/–) and pathologic depth may be predictive of prognosis in patients with gastric cancer.
Collapse
Affiliation(s)
- Sang Yull Kang
- Department of Surgery, Chonbuk National University Medical School, Jeonju, Korea
| | - Ho Sung Park
- Department of Pathology, Chonbuk National University Medical School, Jeonju, Korea
| | - Chan-Young Kim
- Department of Surgery, Chonbuk National University Medical School, Jeonju, Korea
| |
Collapse
|
16
|
Choi BR, Kumar SK, Zhao C, Zhang LT, Kim CY, Lee SW, Jeon JH, So I, Kim SH, Park NC, Kum HK, Park JK. Additive effects of Artemisia capillaris extract and scopoletin on the relaxation of penile corpus cavernosum smooth muscle. Int J Impot Res 2016; 28:80. [PMID: 26965159 DOI: 10.1038/ijir.2016.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
17
|
Yoon WS, Lee NK, Lee JA, Yang DS, Kim CY, Son GS, Chang YW. Abstract P3-12-17: Can radiation dosimetric parameters explain severe skin reaction during adjuvant whole breast irradiation applying field-in-field technique? Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p3-12-17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Aim: Although modern radiotherapy such as field-in-field technique decreased the radiation toxicity, skin reaction is still frequent and main problem during adjuvant whole breast irradiation. Our study investigated various radiation dosimetric and clinical parameters as the risk factors of severe skin reaction.
Methods: From January 2012 to December 2014, total 219 patients with breast conserving surgery and adjuvant whole breast irradiation were retrospectively reviewed. All patients took both whole breast irradiation (50 Gy/25 fractions) and boost to the tumor bed (10 - 15 Gy). Skin reaction was measured by comparing the photography of radiation field between the first day of whole breast irradiation and boost therapy. For each axilla and inferior fold, the intensity (score 1 to 5) and extent (score 0 to 1) of erythema were recorded and summed. The severe skin reaction was defined as score 5 or 6. The relations of various radiation dosimetric parameters for radiotherapy planning, personal breast characteristics and clinical factors to severe skin reaction were evaluated using the Logistic regression tests.
Results: Total 75 (34%) and 57 (26%) patients showed the severe skin reaction to axilla and inferior fold, respectively. The variables of P < 0.2 in univariate analyses including age, the body mass index, the breast height, the V100, the calculated point dose in radiation planning system, the breast separation, the field size, and the gradient of inferior fold entered the multivariate analyses. Age (P=0.013 (OR = 0.950, 95% CI 0.913 - 0.989)), the body mass index (P = 0.015 (OR = 1.123, 95% CI 1.023 - 1.233)), the calculated axilla point dose (P = 0.091 (OR = 1.064, 95% CI 0.990 - 1.142)), and the gradient of inferior fold (P = 0.073 (OR = 1.029, 95% CI 0.997 - 1.063)) were risk factors for severe axilla skin reaction, whereas age (P = 0.018 (OR = 0.948, 95% CI 0.907 - 0.991)) and the V100 (P < 0.001 (OR = 1.005, 95% CI 1.003 - 1.007)) were for severe inferior fold skin reaction.
Conclusion: In addition to clinical factor and personal breast characteristics, the radiation dosimetric parameters such as calculated point dose and V100 could be another predictive factors of severe skin reaction.
Citation Format: Yoon WS, Lee NK, Lee JA, Yang DS, Kim CY, Son GS, Chang YW. Can radiation dosimetric parameters explain severe skin reaction during adjuvant whole breast irradiation applying field-in-field technique?. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P3-12-17.
Collapse
Affiliation(s)
- WS Yoon
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - NK Lee
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - JA Lee
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - DS Yang
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - CY Kim
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - GS Son
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| | - YW Chang
- Ansan Hospital, Korea University, Ansan, Gyeonggi-do, Korea
| |
Collapse
|
18
|
Lee JM, Kim CY, Shin JH, Lee SH, Song JH, Park MS, Kim YS, Kim SK, Chang J, Chung KS. EPH-ephrin signaling in hyperoxia induced lunginjury. Intensive Care Med Exp 2015. [PMCID: PMC4798300 DOI: 10.1186/2197-425x-3-s1-a563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
19
|
Choi BR, Kumar SK, Zhao C, Zhang LT, Kim CY, Lee SW, Jeon JH, Soní KK, So I, Kim SH, Park NC, Kim HK, Park JK. Additive effects of Artemisia capillaris extract and scopoletin on the relaxation of penile corpus cavernosum smooth muscle. Int J Impot Res 2015; 27:225-32. [PMID: 26447600 DOI: 10.1038/ijir.2015.23] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2015] [Revised: 06/07/2015] [Accepted: 07/30/2015] [Indexed: 11/09/2022]
Abstract
The objective was to investigate the cellular effect and action mechanism of Artemisia capillaris extract (ACE) and its component, scopoletin, on penile corpus cavernosum smooth muscle (PCCSM). In vitro study with PCCSM, the precontracted PCCSM with phenylephrine was treated with ACE or scopoletin. Cyclic nucleotides in the perfusate were measured by radioimmunoassay and expression of protein and mRNA of endothelial nitric oxide synthase (eNOS) and neuronal nitric oxide synthase in the perfused PCCSM were measured by western blot and real-time PCR, respectively. The interaction of ACE or scopoletin with udenafil was also evaluated. ACE and scopoletin exerted a significant and concentration-dependent relaxation in PCCSM. The perfusion with ACE or scopoletin significantly increased cyclic adenosine monophosphate (cAMP) and cyclic guanosine monophosphate (cGMP) and the perfusion with ACE or scopoletin increased the expression of eNOS mRNA and protein. Furthermore, ACE or scopoletin enhanced udenafil-inducing relaxation in PCCSM. ACE and scopoletin relaxed the PCCSM mainly by activating nitric oxide-cGMP system and cAMP pathway and they may be additive therapeutic candidates for ED patients who do not completely respond to udenafil.
Collapse
Affiliation(s)
- B R Choi
- Department of Urology, Chonbuk National University and Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University, Jeonju, Republic of Korea
| | - S K Kumar
- Department of Urology, Chonbuk National University and Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University, Jeonju, Republic of Korea
| | - C Zhao
- Department of Urology, Renji Hospital, Jiao Tong University School of Medicine, and Shanghai Institute of Andrology, Shanghai, China
| | - L T Zhang
- Department of Urology, Chonbuk National University and Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University, Jeonju, Republic of Korea
| | - C Y Kim
- Department of Pharmacognosy, Hangyang University, Ansan, Republic of Korea
| | - S W Lee
- Department of Urology, Sungkyunkwan University Medical School, Seoul, Republic of Korea
| | - J-H Jeon
- Department of Physiology, Seoul National University Medical School, Seoul, Republic of Korea
| | | | - I So
- Department of Physiology, Seoul National University Medical School, Seoul, Republic of Korea
| | - S H Kim
- Department of Physiology, Diabetic Research Center, Chonbuk National University Medical School, Jeonju, Republic of Korea
| | - N C Park
- Department of Urology, Pusan National University Hospital, Busan, Republic of Korea
| | - H K Kim
- Department of Urology, Chonbuk National University and Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University, Jeonju, Republic of Korea
| | - J K Park
- Department of Urology, Chonbuk National University and Research Institute of Clinical Medicine of Chonbuk National University-Biomedical Research Institute and Clinical Trial Center of Medical Device of Chonbuk National University, Jeonju, Republic of Korea
| |
Collapse
|
20
|
Lee SH, Lee JM, Kim CY, Park MS, Park BH, Jung WJ, Kim SY, Kim EY, Jung JY, Kang YA, Kim YS, Kim SK, Chang J, Chung KS. Prognostic implications of serum lipid metabolism over time during sepsis. Intensive Care Med Exp 2015. [PMCID: PMC4798139 DOI: 10.1186/2197-425x-3-s1-a226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
|
21
|
Yang DS, Yoon WS, Lee JA, Lee NK, Lee S, Kim CY, Yim HJ, Lee SH, Chung HH, Cha SH. The effectiveness of gadolinium MRI to improve target delineation for radiotherapy in hepatocellular carcinoma: a comparative study of rigid image registration techniques. Phys Med 2014; 30:676-81. [PMID: 24870246 DOI: 10.1016/j.ejmp.2014.05.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 04/14/2014] [Accepted: 05/06/2014] [Indexed: 11/29/2022] Open
Abstract
To achieve consistent target delineation in radiotherapy for hepatocellular carcinoma (HCC), image registration between simulation CT and diagnostic MRI was explored. Twenty patients with advanced HCC were included. The median interval between MRI and CT was 11 days. CT was obtained with shallow free breathing and MRI at exhale phase. On each CT and MRI, the liver and the gross target volume (GTV) were drawn. A rigid image registration was taken according to point information of vascular bifurcation (Method[A]) and pixel information of volume of interest only including the periphery of the liver (Method[B]) and manually drawn liver (Method[C]). In nine cases with an indefinite GTV on CT, a virtual sphere was generated at the epicenter of the GTV. The GTV from CT (VGTV[CT]) and MRI (VGTV[MR]) and the expanded GTV from MRI (V+GTV[MR]) considering geometrical registration error were defined. The underestimation (uncovered V[CT] by V[MR]) and the overestimation (excessive V[MR] by V[CT]) were calculated. Through a paired T-test, the difference between image registration techniques was analyzed. For method[A], the underestimation rates of VGTV[MR] and V+GTV[MR] were 16.4 ± 8.9% and 3.2 ± 3.7%, and the overestimation rates were 16.6 ± 8.7% and 28.4 ± 10.3%, respectively. For VGTV[MR] and V+GTV[MR], the underestimation rates and overestimation rates of method[A] were better than method[C]. The underestimation rates and overestimation rates of the VGTV[MR] were better in method[B] than method[C]. By image registration and additional margin, about 97% of HCC could be covered. Method[A] or method[B] could be recommended according to physician preference.
Collapse
Affiliation(s)
- D S Yang
- Department of Radiation Oncology, Guro Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - W S Yoon
- Department of Radiation Oncology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea.
| | - J A Lee
- Department of Radiation Oncology, Guro Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - N K Lee
- Department of Radiation Oncology, Anam Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - S Lee
- Department of Radiation Oncology, Anam Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - C Y Kim
- Department of Radiation Oncology, Anam Hospital, College of Medicine, Korea University, Seoul, Republic of Korea
| | - H J Yim
- Department of Internal Medicine, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
| | - S H Lee
- Department of Radiology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
| | - H H Chung
- Department of Radiology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
| | - S H Cha
- Department of Radiology, Ansan Hospital, College of Medicine, Korea University, Ansan, Republic of Korea
| |
Collapse
|
22
|
Lee DH, Lee JH, Kim YJ, Park NH, Cho Y, Lee YB, Yoo JJ, Lee M, Cho YY, Choi WM, Yu SJ, Yoon JH, Kim CY, Lee HS. Relationship between polymorphisms near the IL28B gene and spontaneous HBsAg seroclearance: a systematic review and meta-analysis. J Viral Hepat 2014; 21:163-70. [PMID: 24438678 DOI: 10.1111/jvh.12193] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 09/25/2013] [Indexed: 12/13/2022]
Abstract
Polymorphisms near the interleukin (IL) 28B gene have been proposed to be associated with spontaneous clearance of the hepatitis C virus. The purpose of this study was to assess the relationship between IL28B polymorphisms and the rate of spontaneous hepatitis B surface antigen (HBsAg) seroclearance by means of meta-analysis. MEDLINE/PubMed and EMBASE were utilized to identify relevant studies. Odds ratio (OR) and 95% confidence interval (CI) were analysed together to assess the strength of the association. Subgroup analyses were mainly performed according to ethnicity. A total of 4028 cases with persistent chronic hepatitis B and 2327 spontaneously recovered controls were included from 11 studies. The single nucleotide polymorphism (SNP), rs12979860, had no significant association with HBsAg seroclearance (OR = 0.98, 95% CI: 0.84-1.14 in the dominant model; OR = 1.00, 95% CI: 0.68-1.46 in the recessive model; and OR = 0.95, 95% CI: 0.82-1.09 in the allelic model). The SNP, rs12980275, had no significant association either (OR = 1.03, 95% CI: 0.84-1.26 in the dominant model; OR = 1.17, 95% CI: 0.46-2.96 in the recessive model; and OR = 1.04, 95% CI: 0.86-1.26 in the allelic model), nor did the SNP, rs8099917 (OR = 0.94, 95% CI: 0.77-1.15 in the dominant model; OR = 0.74, 95% CI: 0.34-1.62 in the recessive model; and OR = 0.93, 95% CI: 0.77-1.13 in the allelic model). Similarly, the results of subgroup analyses by ethnicity also showed no association in either the Asian group or non-Asian group. We concluded that there was no significant association between common IL28B polymorphisms and the rate of spontaneous HBsAg seroclearance.
Collapse
Affiliation(s)
- D H Lee
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Seoul National University Hospital, Seoul, Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
|
24
|
Hong S, Hara H, Shimazawa M, Hyakkoku K, Kim CY, Seong GJ. Retinal protective effects of topically administered agmatine on ischemic ocular injury caused by transient occlusion of the ophthalmic artery. Braz J Med Biol Res 2012; 45:212-5. [PMID: 22331138 PMCID: PMC3854200 DOI: 10.1590/s0100-879x2012007500020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Accepted: 01/18/2012] [Indexed: 11/22/2022] Open
Abstract
Agmatine, an endogenous polyamine and putative neuromodulator, is known to have neuroprotective effects on various neurons in the central nervous system. We determined whether or not topically administered agmatine could reduce ischemic retinal injury. Transient ocular ischemia was achieved by intraluminal occlusion of the middle cerebral artery of ddY mice (30-35 g) for 2 h, which is known to also induce occlusion of the ophthalmic artery. In the agmatine group (N = 6), a 1.0 mM agmatine-containing ophthalmic solution was administered four times daily for 2 weeks before occlusion. In the control group (N = 6), a 0.1% hyaluronic acid ophthalmic solution was instilled at the same times. At 22 h after reperfusion, the eyeballs were enucleated and the retinal sections were stained by terminal deoxynucleotidyl transferase dUTP nick-end labeling (TUNEL). Transient ocular ischemia induced apoptosis of retinal cells in the entire retinal layer, and topically administered agmatine can significantly reduce this ischemic retinal injury. The proportion of apoptotic cells was definitely decreased (P < 0.001; Kruskal-Wallis test). Overall, we determined that topical agmatine application effectively decreases retinal damage in an in vivo ocular ischemic injury model. This implies that agmatine is a good candidate as a direct neuroprotective agent for eyes with ocular ischemic diseases.
Collapse
Affiliation(s)
- S Hong
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Republic of Korea
| | | | | | | | | | | |
Collapse
|
25
|
Yoon WS, Yang DS, Lee JA, Lee S, Park YJ, Kim CY. Risk factors related to interfractional variation in whole pelvic irradiation for locally advanced pelvic malignancies. Strahlenther Onkol 2012; 188:395-401. [PMID: 22318329 DOI: 10.1007/s00066-011-0049-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2011] [Accepted: 10/04/2011] [Indexed: 11/30/2022]
Abstract
PURPOSE The goal of the present study was to demonstrate risk factors affecting the interfractional variation in whole pelvic irradiation. PATIENTS AND METHODS Daily image acquisitions of 101 patients with locally advanced pelvic malignancy were undertaken using a kilo-voltage orthogonal on-board imager. The baseline deviation (the shift between the initial treatment and each fraction; Value(Base)) and day-to-day variation (the shift between the previous treatment and each fraction; Value(DD)) were measured. The standard deviations (SD) along the x- (right-left), y- (cranial-caudal), and z- (anterior-posterior) axes (SD[x], SD[y], and SD[z], respectively), the 3D vector of the SD (SD[3D]), and the mean of 3D shift (mean[3D]) were calculated in each patient. Various clinical factors, lumbar pelvic balance and rotation, and the shift of 5 consecutive fractions from the initial treatment (Value(5Fx)) were investigated as risk factors. RESULTS The prone set-up showed a larger mean(Base)[3D] than in the supine position (p =0 .063). A body mass index (BMI) ≥ 30 kg/m(2) resulted in the largest mean(DD)[3D] (p = 0.078) and SD(DD)[3D] (p = 0.058). All the SD(5Fx) along the x-, y-, and z-axes had moderate linear relationships with SD(Base) and SD(DD) (p < 0.001). The SD(5Fx)[3D] also had a moderate linear relationship with the mean(Base)[3D], mean(DD)[3D], SD(Base)[3D], and SD(DD)[3D] (p < 0.001). In multivariate analysis, the SD(5Fx) had the same significant relationship with SD(Base) and SD(DD) (p < 0.001). A BMI ≥ 30 kg/m(2) was associated with the largest SD(DD)[x] (p = 0.003). CONCLUSION Close surveillance through high-quality and frequent image guidance is recommended for patients with extensive variations of the initial five consecutive fractions or obesity.
Collapse
Affiliation(s)
- W S Yoon
- Department of Radiation Oncology, Guro Hospital, Korea University College of Medicine, Korea University Medical Center, Guro-dong-gil 97, 152-703, Guro-dong, Guro-gu, Seoul, Korea
| | | | | | | | | | | |
Collapse
|
26
|
Jang KY, Park HS, Moon WS, Kim CY, Kim SH. Heterotopic pancreas in the stomach diagnosed by endoscopic ultrasound-guided fine needle aspiration cytology. Cytopathology 2011; 21:418-20. [PMID: 20105213 DOI: 10.1111/j.1365-2303.2009.00727.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
27
|
Li JW, Matias E, Chen N, Kim CY, Wang J, Gorin J, He F, Thorpe P, Lu Y, Chen WF, Grochulski P, Chen XB, Zhang WJ. Investigations of mechanical vibrations for beamlines at the Canadian Light Source. J Synchrotron Radiat 2011; 18:109-116. [PMID: 21335895 DOI: 10.1107/s0909049510041075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Accepted: 10/12/2010] [Indexed: 05/30/2023]
Abstract
Vibration is often a problem causing poor quality of photon beams at synchrotron radiation facilities, since beamlines are quite sensitive to vibrations. Therefore, vibration analysis and control at synchrotron radiation facilities is crucial. This paper presents investigations on mechanical vibrations at four beamlines and endstations at the Canadian Light Source, i.e. the Canadian Macromolecular Crystallography Facility 08ID-1 beamline, the Hard X-ray MicroAnalysis 06ID-1 beamline, the Resonant Elastic and Inelastic Soft X-ray Scattering 10ID-2 beamline, and the Scanning Transmission X-ray Microscope endstation at the Spectromicroscopy 10ID-1 beamline. This study identifies vibration sources and investigates the influence of mechanical vibrations on beamline performance. The results show that vibrations caused by movable mechanical equipment significantly affect the data acquired from beamlines.
Collapse
Affiliation(s)
- J W Li
- Canadian Light Source Inc., 101 Perimeter Road, Saskatoon, Saskatchewan, Canada S7N 0X4
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Lee J, Kim NR, Kim H, Han J, Lee ES, Seong GJ, Kim CY. Negative refraction power causes underestimation of peripapillary retinal nerve fibre layer thickness in spectral-domain optical coherence tomography. Br J Ophthalmol 2010; 95:1284-9. [PMID: 20956274 DOI: 10.1136/bjo.2010.186536] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND/AIMS Although studies using optical coherence tomography (OCT) reported that the retinal nerve fibre layer (RNFL) thickness of myopic eyes was thinner than those of normal controls, it was unclear if this finding indicated the difference in actual structural thickness or that created by sources affecting accuracy of OCT measurement. This study's aim was to evaluate the effect of refraction power on the measurement of the RNFL thickness using spectral-domain OCT. METHODS OCT scans to measure RNFL thickness were repeated in 15 cycloplegic eyes of 15 participants, while different refraction powers were induced by wearing soft contact lenses of eight different dioptres (-6 to +8). RESULTS Measured RNFL thicknesses decreased significantly with soft contact lenses of higher plus dioptres and increased with those of more minus dioptres. This finding was consistent with or without controlling factors including the signal strength and test-retest variability of the machine. Measurement of peripapillary RNFL thicknesses was not varied between scans performed with and without plano contact lenses. CONCLUSIONS In spectral-domain OCT, RNFL thickness was underestimated in eyes with increasing negative refraction power and overestimated with increasing positive refraction power.
Collapse
Affiliation(s)
- J Lee
- Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine, Seoul, Korea
| | | | | | | | | | | | | |
Collapse
|
29
|
Kim H, Kim CY, Kim DW, Lee IS, Lee GH, Park JC, Lee SJ, Lee KY. Wear performance of self-mating contact pairs of TiN and TiAlN coatings on orthopedic grade Ti-6Al-4V. Biomed Mater 2010; 5:044108. [PMID: 20683130 DOI: 10.1088/1748-6041/5/4/044108] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Both titanium nitride (TiN) and titanium aluminum nitride (TiAlN) have shown great wear resistance potential in metallic medical devices as protective, hard thin film coatings. In the present study, the effects of TiN and TiAlN coating layers on the wear performance of Ti-6Al-4V were compared and analyzed. TiN and TiAlN coatings with a thickness of 3 microm were deposited by a cathodic vacuum arc ion plating technique on the surface of Ti-6Al-4V. Wear tests were conducted by using a pin-on-disk-type tribotester with a point contact self-mating pair in a linear reciprocal motion. A sliding distance of 20 mm per cycle at 1 Hz was used under a load of 15 N under ambient conditions with no lubricant. The wear resistance of TiN and TiAlN coatings is superior to that of uncoated Ti-6Al-4V at the early stage of sliding contact. Until a measurable amount of wear was detected, the number of sliding cycles of the TiAlN coating pair was longer than TiN. After the first detection of wear from the coating layers, the rate of wear of the TiN coating pairs was significantly higher than that of TiAlN (p < 0.05), and it was close to that of the uncoated pairs. In conclusion, the TiAlN coating is superior to TiN from the viewpoint of wear resistance under the test conditions used in this study.
Collapse
Affiliation(s)
- H Kim
- Department of Mechanical Engineering, Bioengineering Research Center, Sejong University, Seoul 143-747, Korea
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Kim YJ, Kim HY, Kim JS, Lee JH, Yoon JH, Kim CY, Park BL, Cheong HS, Bae JS, Kim S, Shin HD, Lee HS. Putative association of transforming growth factor-alpha polymorphisms with clearance of hepatitis B virus and occurrence of hepatocellular carcinoma in patients with chronic hepatitis B virus infection. J Viral Hepat 2010; 17:518-26. [PMID: 19780938 DOI: 10.1111/j.1365-2893.2009.01205.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Previous studies showed that several genetic polymorphisms might influence the clinical outcome of chronic hepatitis B virus (HBV) infection, including HBV clearance or development of hepatocellular carcinoma (HCC). The aim of this study was to determine whether polymorphisms of the transforming growth factor-alpha (TGF-alpha) gene are associated with clinical outcome of HBV infection. A total of 1096 Korean subjects having either present or past evidence of HBV infection were prospectively enrolled between January 2001 and August 2003. Among 16 genetic variants in TGFA gene, nine variants were genotyped using TaqMan assay and the genetic association with HBV clearance and HCC occurrence was analysed. Statistical analyses revealed that TGFA+103461T>C, TGFA+106151C>G and TGFA-ht2 were marginally associated with clearance of HBV infection. However, only TGFA-ht2 retained significance after multiple correction (OR = 0.39, P(corr) = 0.007 in recessive model). Although no variants were significant after multiple correction, TGFA+88344G>A and TGFA+103461T>C were weakly associated in recessive model in the analysis of HCC occurrence. In addition, Cox relative hazards model also revealed that TGFA+88344G>A was associated with onset age of HCC occurrence in subjects (RH = 1.46, P(corr) = 0.04). TGF-alpha polymorphisms might be an important factor in immunity, progression of inflammatory process and carcinogenesis, which explains the variable outcome of HBV infection at least in part. Further biological evidence is warranted in the future to support these suggestive associations.
Collapse
Affiliation(s)
- Y J Kim
- Department of Internal Medicine and Liver Research Institute, Seoul National University College of Medicine, Chongno Gu, Seoul, Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Affiliation(s)
- C Y Kim
- Department of Dermatology, School of Medicine, Gyeongsang Institute of Health Science, Gyeongsang National University and Hospital, Gyeongnam, Korea.
| | | | | |
Collapse
|
32
|
Lim YA, Kim HH, Joung US, Kim CY, Shin YH, Lee SW, Kim HJ. The development of a national surveillance system for monitoring blood use and inventory levels at sentinel hospitals in South Korea. Transfus Med 2009; 20:104-12. [PMID: 20015060 DOI: 10.1111/j.1365-3148.2009.00986.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We developed a web-based program for a national surveillance system to determine baseline data regarding the supply and demand of blood products at sentinel hospitals in South Korea. Sentinel hospitals were invited to participate in a 1-month pilot-test. The data for receipts and exports of blood from each hospital information system were converted into comma-separated value files according to a specific conversion rule. The daily data from the sites could be transferred to the web-based program server using a semi-automated submission procedure: pressing a key allowed the program to automatically compute the blood inventory level as well as other indices including the minimal inventory ratio (MIR), ideal inventory ratio (IIR), supply index (SI) and utilisation index (UI). The national surveillance system was referred to as the Korean Blood Inventory Monitoring System (KBIMS) and the web-based program for KBIMS was referred to as the Blood Inventory Monitoring System (BMS). A total of 30 256 red blood cell (RBC) units were submitted as receipt data, however, only 83% of the receipt data were submitted to the BMS server as export data (25 093 RBC units). Median values were 2.67 for MIR, 1.08 for IIR, 1.00 for SI, 0.88 for UI and 5.33 for the ideal inventory day. The BMS program was easy to use and is expected to provide a useful tool for monitoring hospital inventory levels. This information will provide baseline data regarding the supply and demand of blood products in South Korea.
Collapse
Affiliation(s)
- Y A Lim
- Department of Laboratory Medicine, Ajou University School of Medicine, Suwon, Korea.
| | | | | | | | | | | | | |
Collapse
|
33
|
Hwang SE, Yang DH, Kim CY. Prognostic factors for survival in patients with hepatic recurrence after curative resection of gastric cancer. World J Surg 2009; 33:1468-72. [PMID: 19381718 DOI: 10.1007/s00268-009-0034-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND This study was done to evaluate the prognostic factors that may affect the survival of patients with recurrent hepatic metastasis after curative resection of gastric cancer. METHODS We reviewed the medical records of 73 patients with recurrent hepatic metastasis after surgical treatment of gastric cancer from January 1995 to December 2005. Prognostic factors were classified into three groups: primary tumor factors, recurrent hepatic factors, and treatment factors. The prognostic values of these factors were assessed using univariate and multivariate analyses by the log-rank test in the Kaplan-Meier method and Cox's proportional hazard model. RESULTS The overall median survival rate of the 73 study patients was 20.0 months [95% confidence interval (CI) 15.4-24.6 months]. The median survival rate after diagnosis of recurrent hepatic metastasis was 5 months (95% CI 3.5-6.5 months). Univariate analysis showed that the favorable prognostic factors were stage I and II among the primary tumor factors, no extrahepatic metastasis and unilobar distribution among the recurrent hepatic factors, and radiofrequency ablation (RFA) +/- chemotherapy among the treatment factors when operative treatment had been excluded. The independent favorable prognostic factors revealed by the multivariate analysis were no extrahepatic metastasis and RFA +/- chemotherapy. The median survival rate of patients who had two favorable prognostic factors was 27 months (95% CI 0-66.38 months). CONCLUSIONS Improvement in the survival rate can be expected with RFA +/- chemotherapy for patients with recurrent gastric cancer in the liver without extrahepatic metastasis.
Collapse
Affiliation(s)
- Si-Eun Hwang
- Department of Surgery, Chonbuk National University Medical School, Dukjin-Gu, Jeonju, Chonbuk, Korea
| | | | | |
Collapse
|
34
|
Jin HY, Kang YM, Kim CY, Kim SH, Liu WJ, Piao MH, Park JH, Baek HS, Park TS. Morphological comparison of small nerve fibres in gastric mucosa in non-diabetic and Type 2 diabetic subjects. Diabet Med 2009; 26:943-6. [PMID: 19719718 DOI: 10.1111/j.1464-5491.2009.02787.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
AIM To determine changes in small nerve fibres in gastric mucosa in patients with Type 2 diabetes by morphological observation. METHODS In twenty-five non-diabetic and 21 Type 2 diabetic participants, gastric mucosal biopsy under endoscopy was performed. Innervation in gastric mucosa was detected using immunohistochemical staining. Anti-protein gene product (PGP) 9.5 positive nerves underwent morphological observation and quantitative analysis. RESULTS Small nerve fibres in gastric mucosa were shortened in the diabetic subjects. The ratio of gastric mucosal protrusions maintaining nerve fibres between gastric pits to total observed protrusions was lower in patients with Type 2 diabetes compared with the non-diabetic subjects (ratio of innervated protrusion/total protrusion: 0.49 +/- 0.12 vs. 0.89 +/- 0.06, P < 0.05). CONCLUSIONS This study sets the scene for further research to investigate the relationship between gastric mucosal nerves and autonomic neuropathy or diabetic peripheral neuropathy.
Collapse
Affiliation(s)
- H Y Jin
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Research Institute of Clinical Medicine, Chonbuk National University Medical School, Jeonju, 561-712, South Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Choi JA, Kim CY, Na KS, Park SH, Joo CK. Clinical results after implantation of a spherical aberration-free intraocular lens: effect of contrast sensitivity and wavefront aberration--a clinical comparative study. Ophthalmologica 2009; 223:320-5. [PMID: 19468244 DOI: 10.1159/000219857] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Accepted: 11/13/2008] [Indexed: 11/19/2022]
Abstract
PURPOSE To compare the clinical results of the spherical aberration-free Akreos AO (Bausch & Lomb) with the Akreos Adapt (Bausch & Lomb), the parent model of spherical optic design. METHODS Fifty patients (100 eyes) were randomly assigned to bilaterally receive Akreos AO or Akreos Adapt intraocular lenses (IOLs) after phacoemulsification. At 6 months postoperatively, best-corrected contrast sensitivities were determined at 3, 4.8, 7.5, 12 and 19 cycles per degree using a Visual Capacity Analyzer (L2 Informatique) under mesopic (5 cd/m(2)) and photopic (100 cd/m(2)) conditions with undilated pupils. Wavefront analysis of total aberration was performed with the WaveScan WaveFront System (Advanced Medical Optics VISX). RESULTS Postoperative contrast sensitivities were not statistically different under mesopic and photopic conditions. On the other hand, fourth-order spherical aberration was lower in the AO group than the Adapt group with only a marginal difference (p = 0.048). Other higher-order aberrations such as coma and trefoil were not significantly different between the two groups (p = 0.657, 0.614). The questionnaire on subjective visual quality in terms of glare disability, distant vision and night driving did not reveal an improved visual function in the AO group. CONCLUSION The spherical aberration-free Akreos AO IOL did not show improved visual quality compared with its spherical counterpart.
Collapse
Affiliation(s)
- Jin-A Choi
- Department of Ophthalmology and Visual Science, Kangnam St. Mary's Hospital, College of Medicine, Catholic University of Korea, Seoul, Korea
| | | | | | | | | |
Collapse
|
36
|
Kim CY, Yang DH. Adjustment of N stages of gastric cancer by the ratio between the metastatic and examined lymph nodes. Ann Surg Oncol 2009; 16:1868-74. [PMID: 19434459 DOI: 10.1245/s10434-009-0430-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2008] [Revised: 02/18/2009] [Accepted: 02/18/2009] [Indexed: 12/25/2022]
Abstract
BACKGROUND The present study attempted to determine whether N stage could be adjusted for the differences in survival rates based on the ratio between the examined and metastatic lymph nodes (LN ratio). METHODS Five hundred and twenty-nine patients with both >15 lymph nodes examined and >or= N1 after R0 resection were enrolled in the present study. To determine the cutoff LN ratio, the ratios at each N stage were compared at intervals of 10% with the log-rank test of Kaplan-Meier estimates of the survival curves. RESULTS The 5-year survival rate of patients with N1 was 71.7%. Those of N2 patients with LN ratio of <60% (n = 116) and >or=60% (n = 3) were 37.0% and 0%, respectively. Those of N3 patients with LN ratio of <30% (n = 32), between 30% and 60% (n = 67), and >or=60% (n = 26) were 31.0%, 16.3%, and 0%, respectively. Thus, adjusted N2 was obtained from the sum of N2 < 60% and N3 < 30%. N3 with an LN ratio between 30% and 60% was regarded as adjusted N3. N2 and N3 patients with an LN ratio of >or=60% were regarded as adjusted T4. The 5-year survival rate in patients with adjusted N2, N3, and N4 were 35.7%, 16.3%, and 0%, respectively. Multivariate analysis showed adjusted N stage and tumor depth were significant independent prognostic factors. CONCLUSIONS The results of this study suggest that, since stage migration can be induced in the N staging system, such stage migration can be adjusted by the LN ratio based on the survival rate.
Collapse
Affiliation(s)
- Chan-Young Kim
- Department of Surgery, Chonbuk National University Medical School, Chonju, Chonbuk, Korea
| | | |
Collapse
|
37
|
Jeong DS, Kim KH, Kim CY, Kim JS. Efficacy of a High-Dose Aprotinin Regimen for Reducing Transfusion Requirements and Inflammatory Responses in Adult Cardiac Surgery. J Int Med Res 2008; 36:1039-48. [DOI: 10.1177/147323000803600522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This study evaluated and compared the risks and effects to the inflammatory response of low- and high-dose aprotinin regimens. Between January and June 2006, patients scheduled for cardiac surgery using cardiopulmonary bypass were enrolled and randomly allocated to either low- ( n = 15) or high-dose ( n = 13) aprotinin groups. The incidences of mortality and adverse events were comparable in both groups. Post-operative creatinine levels and blood loss were not significantly different between the two groups. With the exception of platelets, the counts of transfused allogenic blood products were not significantly different between the groups. Interleukin (IL)-6, IL-10, soluble tumour necrosis factor II receptor, and interferon-γ levels increased in both groups compared with baseline, but no significant intergroup differences were detected. In conclusion, high- and low-dose aprotinin had similar effects in the reduction of mediastinal bleeding and attenuation of systemic inflammatory responses, and high-dose aprotinin therapy could be used without any increased adverse effects.
Collapse
Affiliation(s)
- DS Jeong
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Chongno-gu, Seoul, Korea
| | - K-H Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Chongno-gu, Seoul, Korea
| | - CY Kim
- Department of Thoracic and Cardiovascular Surgery, Inje University Ilsan Paik Hospital, Goyang, Gyeonggi Province, Korea
| | - JS Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Chongno-gu, Seoul, Korea
| |
Collapse
|
38
|
Cho MH, Kim CY, Moon K, Chung KB, Yim CJ, Ko DH, Sohn HC, Jeon H. Change in the interfacial reaction of Hf-silicate film as a function of thickness and stoichiometry. J Chem Phys 2008; 129:034705. [PMID: 18647036 DOI: 10.1063/1.2955461] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Medium energy ion scattering and high-resolution transmission electron microscopy are used to investigate the depth of the interfacial reaction of Hf-silicate film. The interfacial reaction is critically affected by the film thickness and the mole fraction of HfO(2) in silicate film. The interfacial compressive strain generated at the surface of the Si substrate is dependent on the film thickness during the postannealing process in film with a thickness of approximately 4 nm. Finally, the phase separation phenomenon demonstrates critically different behaviors at different film thicknesses and stoichiometries because the diffusion of Si from interface to surface is dependent on these factors. Moreover, the oxidation by oxygen impurity in the inert ambient causes SiO(2) top formation.
Collapse
Affiliation(s)
- M-H Cho
- Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, South Korea.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Jeong DS, Kim KH, Kim CY, Kim JS. Relationship between Plasma B-type Natriuretic Peptide and Ventricular Function in Adult Cardiac Surgery Patients. J Int Med Res 2008; 36:31-9. [DOI: 10.1177/147323000803600105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Plasma concentrations of B-type natriuretic peptide (BNP) were analysed during the peri- and post-operative periods in cardiac surgery patients, and the relationship between plasma BNP concentrations and various clinical parameters was explored. Thirty patients (17 women, 13 men) of age 54.5 ± 17.1 years undergoing cardiac surgery between June 2004 and March 2005 were enrolled. Plasma BNP concentrations were measured pre-operatively, immediately post-operatively, and on the first, second, fourth and seventh post-operative days. On the first post-operative day, the BNP level was significantly increased but levels returned to baseline values by the seventh post-operative day. The pre-operative BNP level correlated with left ventricular ejection fraction and age, and the level 24 h after surgery correlated with left ventricular end-diastolic dimension and pre-operative BNP levels. These results showed that the plasma BNP concentration becomes markedly and acutely elevated after cardiac surgery, reflecting temporary ventricular dysfunction.
Collapse
Affiliation(s)
- DS Jeong
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Chongno-gu, Seoul, Korea
| | - K-H Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Chongno-gu, Seoul, Korea
| | - CY Kim
- Department of Thoracic and Cardiovascular Surgery, Inje University Ilsan Paik Hospital, Goyang, Gyeonggi Province, Korea
| | - JS Kim
- Department of Thoracic and Cardiovascular Surgery, Seoul National University Hospital, Chongno-gu, Seoul, Korea
| |
Collapse
|
40
|
Ma KT, Lee HK, Seong GJ, Kim CY. Phacoemulsification using iris hooks and scleral fixation of the intraocular lens in patients with secondary glaucoma associated with lens subluxation. Eye (Lond) 2007; 22:1187-90. [PMID: 17585310 DOI: 10.1038/sj.eye.6702909] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
PURPOSE We described the techniques and results of phacoemulsification using iris hook and scleral fixation of intraocular lens (IOL) in patients with secondary glaucoma associated with lens subluxation. METHODS Eight eyes of seven patients with secondary glaucoma associated with lens dislocation, who had undergone the surgery, were retrospectively reviewed. RESULTS At a mean of 23.5 months+/-13.6 (SD) after the surgery, the mean best-corrected visual acuity improved from 0.24+/-0.21 to 0.83+/-0.3, and mean intraocular pressure (IOP) was changed from 38.4+/-11.4 to 15.5+/-1.8 mmHg at the final examination. There were no vitreoretinal complications except cystoid macular oedema in one eye. CONCLUSION The technique appears to be safe and effective in terms of visual rehabilitation and controlling IOP in patients with secondary glaucoma associated with lens subluxation.
Collapse
Affiliation(s)
- K T Ma
- Siloam Eye Hospital, Seoul, Korea
| | | | | | | |
Collapse
|
41
|
Chang EY, Minjarez RC, Kim CY, Seltman AK, Gopal DV, Diggs B, Davila R, Hunter JG, Jobe BA. Endoscopic ultrasound for the evaluation of Nissen fundoplication integrity: a blinded comparison with conventional testing. Surg Endosc 2007; 21:1719-25. [PMID: 17345143 DOI: 10.1007/s00464-007-9234-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2006] [Revised: 11/03/2006] [Accepted: 11/20/2006] [Indexed: 11/24/2022]
Abstract
BACKGROUND For patients whose symptoms develop after Nissen fundoplication, the precise mechanism of anatomic failure can be difficult to determine. The authors have previously reported the endosonographic hallmarks defining an intact Nissen fundoplication in swine and the known causes of failure. The current clinical trial tested the hypothesis that a defined set of endosonographic criteria can be applied to determine fundoplication integrity in humans. METHODS The study enrolled seven symptomatic and nine asymptomatic subjects at a mean of 6 years (range, 1-30 years) after Nissen fundoplication. A validated gastroesophageal reflux disease (GERD)-specific questionnaire and medication history were completed. Before endoscopic ultrasound (EUS), all the patients underwent complete conventional testing (upper endoscopy, esophagram, manometry, 24-h pH). A diagnosis was rendered on the basis of combined test results. Then EUS was performed by an observer blinded to symptoms, medication use, and conventional testing diagnoses. Because EUS and esophagogastroduodenoscopy (EGD) are uniformly performed in combination, the EUS diagnosis was rendered on the basis of previously established criteria combined with the EGD interpretation. The diagnoses then were compared to examine the contribution of EUS in this setting. RESULTS The technique and defined criteria were easily applied to all subjects. All symptomatic patients had heartburn and were taking proton pump inhibitors (PPI). No asymptomatic patients were taking PPI. All diagnoses established with combined conventional testing were detected on EUS with upper endoscopy. Additionally, EUS resolved the etiology of a low lower esophageal sphincter pressure in two symptomatic patients and detected the additional diagnoses of slippage in two subjects. Among asymptomatic subjects, EUS identified additional diagnoses in two subjects considered to be normal by conventional testing methods. CONCLUSION According to the findings, EUS is a feasible method for evaluating post-Nissen fundoplication hiatal anatomic relationships. The combination of EUS and EGD allows the mechanism of failure to be detected in patients presenting with postoperative symptoms after Nissen fundoplication.
Collapse
Affiliation(s)
- E Y Chang
- Department of Surgery, Oregon Health & Science University, Portland, OR, USA
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Seo JH, Kim CY, Kang SJ, Yoo KH, Whang CN, Moewes A, Chang GS. Electronic structure of NPB and BCP molecules probed by x-ray emission spectroscopy. J Chem Phys 2007; 126:064706. [PMID: 17313237 DOI: 10.1063/1.2464086] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Soft x-ray absorption and emission spectroscopies have been employed to investigate the electronic structure and chemical bonding of two prototypical molecules, N,N(')-bis-(1-naphthyl)-N,N(')-diphenyl-1,1(')-biphenyl-4,4(')-diamine (NPB) and bathocuproine (BCP), which are frequently chosen because of their hole-transporting and hole-blocking properties, respectively. The resulting resonant C Kalpha x-ray emission spectra of these materials reveal different spectral features depending on the resonant excitation energy. According to the N absorption and emission spectra, the contribution of N atoms to the highest occupied and lowest unoccupied molecular orbitals is different for in NPB and in BCP. Detailed knowledge of these materials will allow tailoring charge transport properties of organic devices in order to develop high performance organic light-emitting diodes and photovoltaic cells.
Collapse
Affiliation(s)
- J H Seo
- Institute of Physics and Applied Physics, Yonsei University, Seoul 120-749, Korea
| | | | | | | | | | | | | |
Collapse
|
43
|
|
44
|
Todorova MT, Mantis JG, Le M, Kim CY, Seyfried TN. Genetic and environmental interactions determine seizure susceptibility in epileptic EL mice. Genes Brain Behav 2006; 5:518-27. [PMID: 17010098 DOI: 10.1111/j.1601-183x.2006.00204.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Gene identification has progressed rapidly for monogenic epilepsies, but complex gene-environmental interactions have hindered progress in gene identification for multifactorial epilepsies. We analyzed the role of environmental risk factors in the inheritance of multifactorial idiopathic generalized epilepsy in the EL mouse. Seizure susceptibility was evaluated in the EL (E) and seizure-resistant ABP/LeJ (A) parental mouse strains and in their AEF1 and AEF2 hybrid offspring using a handling-induced seizure test. The seizure test was administered in three environments (environments I, II and III) that differed with respect to the number of seizure tests administered (one test or four tests) and the age of the mice when tested (young or old). The inheritance of seizure susceptibility appeared dominant after repetitive seizure testing in young or old mice, but recessive after a single test in old mice. Heritability was high (0.67-0.77) in each environment. Significant quantitative trait loci (QTL) that were associated with environments I and III (repetitive testing) were found on chromosomes 2 and 9 and colocalized with previously mapped El2 and El4, respectively. The El2 QTL found in environment I associated only with female susceptibility. A novel QTL, El-N, for age-dependent predisposition to seizures was found on proximal chromosome 9 only in environment II. The findings indicate that environmental risk factors determine the genetic architecture of seizure susceptibility in EL mice and suggest that QTL for complex epilepsies should be defined in terms of the environment in which they are expressed.
Collapse
Affiliation(s)
- M T Todorova
- Biology Department, Boston College, Chestnut Hill, MA 02467, USA
| | | | | | | | | |
Collapse
|
45
|
Han YM, Kim CY, Yang DH, Kwak HS, Jin GY. Fluoroscopically guided feeding tube insertion for relief of postoperative gastrointestinal anastomotic obstruction and leakage. Cardiovasc Intervent Radiol 2006; 29:395-400. [PMID: 16502160 DOI: 10.1007/s00270-005-0095-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE To evaluate the feasibility and effectiveness of feeding tube insertion and enteral feeding for the treatment of postoperative gastrointestinal anastomotic obstruction and leakage. MATERIALS AND METHODS From June 1999 to June 2002, thirty-four cases of postoperative gastrointestinal anastomotic obstruction and leakage after surgery for gastric carcinoma were treated by insertion of a feeding tube under fluoroscopic guidance. Twenty-one patients were male and 13 were female. The patients' ages ranged from 39 to 74 years (mean age: 61 years). All the patients experienced vomiting, and 15 patients had anastomotic site or duodenal stump leakage. We evaluated the feasibility of feeding tube insertion for enteral feeding to improve the obstruction and facilitate leakage site closure, and the patients' nutritional benefit was also evaluated by checking the serum albumin level between pre- and post-enteral feeding via the feeding tube. RESULTS Thirty-two patients (94%) were successfully managed by feeding tube insertion, but the remaining two were not managed, and this was due to severe angulations at the anastomotic site. The procedure times for feeding tube insertion ranged from 15 to 60 minutes (mean time: 45 minutes). Twenty-eight patients experienced symptomatic relief of gastrointestinal obstruction, and they were able to resume a normal regular diet after feeding tube removal. Three patients underwent stent insertion due to recurrent symptoms, and one patient underwent jejunostomy feeding due to the presence of a persistent leakage site. Eleven patients achieved leakage site closure after enteral feeding via a feeding tube. The serum albumin level was significant, increased from pre-enteral feeding (2.65 +/- 0.37 g/dL) to the post-enteral feeding (3.64 +/- 0.58 g/dL) via the feeding tube (p < 0.001). The duration of follow-up ranged from one to 53 months (mean: 23 months). CONCLUSION The insertion of a feeding tube for enteral feeding under fluoroscopic guidance is safe, and it provides effective relief from gastrointestinal anastomotic site obstruction and leakage after gastric surgery. Moreover, our findings indicate that feeding tube insertion for enteral feeding may be used as the primary procedure to treat postoperative anastomotic obstruction and leakage.
Collapse
Affiliation(s)
- Young-Min Han
- Department of Radiology, Chonbuk National University Medical School and Hospital, Keumam Dong, Chonju, Republic of Korea.
| | | | | | | | | |
Collapse
|
46
|
Abstract
PURPOSE The development of mouse models of glaucoma requires methods to accurately measure the intraocular pressure (IOP) in this species. The aim of this study was to compare the accuracy of IOP measurements in mice between modified Goldmann and rebound tonometers. METHODS IOP was measured either with a modified Goldmann or a rebound tonometer while simultaneously measuring the IOP using invasive manometry in enucleated eyes and in vivo. The level of IOP was controlled hydrostatically. The agreement and correlation between the IOP determined by invasive manometry and by either noninvasive method was evaluated. In addition, the IOP was determined by both noninvasive methods in a cohort of mice with laser-induced ocular hypertension (OHT), and the agreement and correlation between the two tonometry methods were evaluated. RESULTS Measured IOP by either noninvasive tonometer correlated well with those recorded simultaneously by invasive manometry (r=0.98 for rebound and r=0.94 for Goldmann). In mice with OHT, the IOP correlation between rebound and modified Goldmann was moderate (r=0.71); the IOP measured by modified Goldmann tonometry was consistently higher than that by rebound by approximately 5 mmHg. However, the relative per cent increases in IOP were similar between the two methods. CONCLUSION Both noninvasive methods of IOP measurements in mice are suitable to detect changes in IOP although rebound tonometry correlated better with the invasive manometry readings. The results suggest that the relative, rather than absolute, IOP offers a more reliable means of correlating findings from studies using different tonometers.
Collapse
Affiliation(s)
- C Y Kim
- Department of Ophthalmology and Visual Sciences, The University of Iowa, Iowa City, IA, USA
| | | | | | | |
Collapse
|
47
|
Ahn MJ, Yoon KD, Kim CY, Kim JH, Shin CG, Kim J. Inhibitory activity on HIV-1 reverse transcriptase and integrase of a carmalol derivative from a brown Alga, Ishige okamurae. Phytother Res 2006; 20:711-3. [PMID: 16775811 DOI: 10.1002/ptr.1939] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The bioassay-directed isolation of a marine brown alga, Ishige okamurae, afforded a carmalol derivative, diphlorethohydroxycarmalol. This compound exhibited inhibitory effects on HIV-1 reverse transcriptase and integrase with IC(50) values of 9.1 microM and 25.2 microM, respectively. However, diphlorethohydroxycarmalol did not show an inhibitory activity against HIV-1 protease. Moreover, diphlorethohydroxycarmalol nonaacetate obtained by acetylation and fucosterol failed to show any inhibitory activity against these viral enzymes.
Collapse
Affiliation(s)
- M-J Ahn
- Department of Crops Biotechnology, College of Life Sciences and Natural Resources, Jinju National University, Jinju, Gyeongnam 660-758, Korea
| | | | | | | | | | | |
Collapse
|
48
|
|
49
|
Yoon SY, Kwon YB, Kim HW, Roh DH, Kang SY, Kim CY, Han HJ, Kim KW, Yang IS, Beitz AJ, Lee JH. Intrathecal neostigmine reduces the zymosan-induced inflammatory response in a mouse air pouch model via adrenomedullary activity: Involvement of spinal muscarinic type 2 receptors. Neuropharmacology 2005; 49:275-82. [PMID: 15922370 DOI: 10.1016/j.neuropharm.2004.12.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2004] [Revised: 11/04/2004] [Accepted: 12/10/2004] [Indexed: 11/26/2022]
Abstract
Intrathecal (IT) injection of neostigmine (a cholinesterase inhibitor) has been reported to produce a significant anti-nociceptive effect in a number of inflammatory pain models. However, a potential anti-inflammatory effect of IT neostigmine in these models has not been investigated. In the present study, we have examined the 'anti-inflammatory effect of IT injection of neostigmine' (AI-NEO) using a standard mouse air pouch model by evaluating the effect of AI-NEO on zymosan-induced leukocyte migration and myeloperoxidase (MPO) release. IT neostigmine was found to suppress both leukocyte migration and MPO degranulation in a dose dependent manner. We then established which subtypes of cholinergic receptors were involved in this AI-NEO. IT pretreatment with atropine (a muscarinic receptor antagonist) but not hexamethonium (a nicotinic receptor antagonist) completely blocked the IT neostigmine anti-inflammatory effect. Subsequent experiments showed that IT pretreatment with methoctramine (a muscarinic type 2 (M2) receptor antagonist), but not pirenzepine (M1 receptor antagonist) or 4-DAMP (M3 receptor antagonist), suppressed the AI-NEO. We then evaluated whether adrenal glandular activity was important in the AI-NEO. Adrenalectomy significantly blocked the AI-NEO, while intraperitoneal pretreatment with the beta-adrenoceptor antagonist (propranolol), but not the corticosteroid antagonist (RU486) reversed AI-NEO. In conclusion, these results indicate that IT neostigmine facilitates the activation of spinal M2 receptors and this activation ultimately leads to release of adrenal catecholamines which contribute to the anti-inflammatory effect observed at the site of tissue inflammation.
Collapse
Affiliation(s)
- Seo-Yeon Yoon
- Department of Veterinary Physiology, College of Veterinary Medicine and School of Agricultural Biotechnology, Seoul National University, Seoul, South Korea
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Yi HK, Kim SY, Hwang PH, Kim CY, Yang DH, Oh Y, Lee DY. Impact of PTEN on the expression of insulin-like growth factors (IGFs) and IGF-binding proteins in human gastric adenocarcinoma cells. Biochem Biophys Res Commun 2005; 330:760-7. [PMID: 15809062 DOI: 10.1016/j.bbrc.2005.03.045] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2005] [Indexed: 02/06/2023]
Abstract
PTEN is a tumor suppressor gene that is frequently mutated or deleted in a variety of human cancers including human gastric cancer. PTEN functions primarily as a lipid phosphatase and plays a key role in the regulation of the PI3 kinase/Akt pathway, thereby modulating cell proliferation and cell survival. On the other hand, the IGF system plays an important role in cell proliferation and cell survival via the PI3 kinase/Akt and MAP kinase pathways in many cancer cells. To characterize the impact of PTEN on the IGF-IGFR-IGFBP axis in gastric cancer, we overexpressed PTEN using an adenovirus gene transfer system in human gastric adenocarcinoma cells, SNU-484 and SNU-663, which lack PTEN. Overexpression of PTEN inhibited serum-induced as well as IGF-I-induced cell proliferation as compared to control cells. PTEN overexpression resulted in a significant decrease in the expression of IGF-I, -II, and IGF-IR. Interestingly, amongst the six IGFBPs, only IGFBP-3 was upregulated by PTEN, whereas IGFBP-4 and -6 were reduced. The IGFBP-3 promoter activity assay and Western immunoblotting demonstrate that PTEN regulates IGFBP-3 at the transcriptional level. In addition, the PI3 kinase inhibitor, LY294002, upregulates IGFBP-3 expression but downregulates IGF-I and IGF-II, indicating that PTEN controls IGFBP-3 and IGFs by an Akt-dependent pathway. These findings suggest that PTEN may inhibit antiapoptotic IGF actions not only by blocking the IGF-IGFR-induced Akt activity, but also by regulating expression of components of the IGF system, in particular, upregulation of IGFBP-3, which is known to exert antiproliferative effects through IGF-dependent and IGF-independent mechanisms in cancer cells.
Collapse
Affiliation(s)
- Ho-Keun Yi
- Department of Biochemistry, School of Dentistry, Chonbuk National University, Jeonju, Republic of Korea
| | | | | | | | | | | | | |
Collapse
|