1
|
Kim K, Lee K, Cho S, Kang DU, Park S, Kang Y, Kim H, Choe G, Moon KC, Lee KS, Park JH, Hong C, Nateghi R, Pourakpour F, Wang X, Yang S, Jahromi SAF, Khani A, Kim HR, Choi DH, Han CH, Kwak JT, Zhang F, Han B, Ho DJ, Kang GH, Chun SY, Jeong WK, Park P, Choi J. PAIP 2020: Microsatellite instability prediction in colorectal cancer. Med Image Anal 2023; 89:102886. [PMID: 37494811 DOI: 10.1016/j.media.2023.102886] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 06/21/2023] [Accepted: 06/28/2023] [Indexed: 07/28/2023]
Abstract
Microsatellite instability (MSI) refers to alterations in the length of simple repetitive genomic sequences. MSI status serves as a prognostic and predictive factor in colorectal cancer. The MSI-high status is a good prognostic factor in stage II/III cancer, and predicts a lack of benefit to adjuvant fluorouracil chemotherapy in stage II cancer but a good response to immunotherapy in stage IV cancer. Therefore, determining MSI status in patients with colorectal cancer is important for identifying the appropriate treatment protocol. In the Pathology Artificial Intelligence Platform (PAIP) 2020 challenge, artificial intelligence researchers were invited to predict MSI status based on colorectal cancer slide images. Participants were required to perform two tasks. The primary task was to classify a given slide image as belonging to either the MSI-high or the microsatellite-stable group. The second task was tumor area segmentation to avoid ties with the main task. A total of 210 of the 495 participants enrolled in the challenge downloaded the images, and 23 teams submitted their final results. Seven teams from the top 10 participants agreed to disclose their algorithms, most of which were convolutional neural network-based deep learning models, such as EfficientNet and UNet. The top-ranked system achieved the highest F1 score (0.9231). This paper summarizes the various methods used in the PAIP 2020 challenge. This paper supports the effectiveness of digital pathology for identifying the relationship between colorectal cancer and the MSI characteristics.
Collapse
Affiliation(s)
- Kyungmo Kim
- Interdisciplinary program in Bioengineering, Seoul National University, Seoul 110-799, Republic of Korea
| | - Kyoungbun Lee
- Department of Pathology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Sungduk Cho
- Korea University, College of Informatics, Department of Computer Science and Engineering, Seoul, Republic of Korea
| | - Dong Un Kang
- Department of Electrical and Computer Engineering, Seoul National University, Seoul, Republic of Korea
| | - Seongkeun Park
- Department of Biomedical Engineering, Seoul National University Hospital, Seoul, Republic of Korea
| | - Yunsook Kang
- Department of Biomedical Engineering, Seoul National University Hospital, Seoul, Republic of Korea
| | - Hyunjeong Kim
- Department of Biomedical Engineering, Seoul National University Hospital, Seoul, Republic of Korea
| | - Gheeyoung Choe
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea; Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyung Chul Moon
- Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyu Sang Lee
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea; Department of Pathology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Jeong Hwan Park
- Department of Pathology, Seoul National University College of Medicine, SMG-SNU Boramae Medical Center, Seoul, Republic of Korea
| | - Choyeon Hong
- Department of Pathology, Seoul National University Hospital, Seoul, Republic of Korea
| | - Ramin Nateghi
- Electrical and Electronics Engineering Department, Shiraz University of Technology, Shiraz, Iran
| | - Fattaneh Pourakpour
- Iranian Brain Mapping Biobank, National Brain Mapping Laboratory, Tehran, Iran
| | - Xiyue Wang
- College of Computer Science, Sichuan University, China
| | - Sen Yang
- College of Biomedical Engineering, Sichuan University, China; Tencent AI Lab, Shenzhen, China
| | | | - Aliasghar Khani
- Department of Computer Engineering, Sharif University of Technology, Tehran, Iran
| | - Hwa-Rang Kim
- Graduate School of Electronic and Electrical Engineering, Kyungpook National University, Republic of Korea
| | - Doo-Hyun Choi
- Graduate School of Electronic and Electrical Engineering, Kyungpook National University, Republic of Korea
| | - Chang Hee Han
- Department of Computer Science and Engineering, Sejong University, Seoul, Republic of Korea
| | - Jin Tae Kwak
- School of Electrical Engineering, Korea University, Seoul, Republic of Korea
| | - Fan Zhang
- Research and Development Center, Canon Medical Systems (China) Co., Ltd, Beijing, China
| | - Bing Han
- Research and Development Center, Canon Medical Systems (China) Co., Ltd, Beijing, China
| | - David Joon Ho
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Gyeong Hoon Kang
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam, Republic of Korea; Laboratory of Epigenetics, Cancer Research Institute, Seoul National University College of Medicine, Republic of Korea.
| | - Se Young Chun
- Department of Electrical and Computer Engineering, INMC, Seoul National University, Seoul, Republic of Korea.
| | - Won-Ki Jeong
- Korea University, College of Informatics, Department of Computer Science and Engineering, Seoul, Republic of Korea.
| | | | - Jinwook Choi
- Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, Republic of Korea.
| |
Collapse
|
2
|
Lee B, Kim BG, Baraki TG, Kim JS, Lee YJ, Lee SJ, Hong SJ, Ahn CM, Shin DH, Kim BK, Ko YG, Choi DH, Honh MK, Jang YS. Stent expansion evaluated by optical coherence tomography and subsequent outcomes. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1203] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Regarding stent expansion indexes, previous optical coherence tomography (OCT) studies have shown minimal stent area (MSA) to be most predictive of adverse events.
Purpose
We sought to evaluate the impact of various stent expansion indexes by post-stent OCT on long-term clinical outcomes, and hence to find OCT-defined optimal stent expansion criteria.
Methods
Of the patients registered in the Yonsei OCT registry, a total of 1071 patients with 1123 native coronary artery lesions treated with new-generation drug-eluting stents under the OCT guidance and analyzable final post-stent OCT were included. Stent expansion indexes and different suboptimal stent expansion criteria were evaluated for their association with device-oriented clinical endpoints (DoCE) including cardiac death, target vessel-related myocardial infarction (TVMI) or stent thrombosis, and target lesion revascularization. Major safety events (MSE) included cardiac death, TVMI or stent thrombosis.
Results
The median follow-up period was 40.6 (interquartile range 22.0–50.0) months. As a continuous variable, MSA, adaptive volumetric stent expansion (stent volume/adaptive reference lumen volume) and overall volumetric stent expansion (stent volume/post-stent lumen volume) were significantly predictive of DoCE. As a categorical criteria, MSA <5.0 mm2 (hazard ratio [HR] 3.80; 95% confidence interval [CI] 1.53–9.45), MSA/distal reference lumen area <90% (HR 2.13; 95% CI 1.10–4.14), and overall volumetric stent expansion ≥96.6% (HR 2.38; 95% CI 1.09–5.22) were independently associated with DoCE after adjusting for confounders, and a total malapposition volume ≥7.0 mm3 (HR 3.38; 95% CI 1.05–10.93) was linked to MSE.
Conclusions
This OCT study highlights that sufficient stent expansion to achieve adequate absolute MSA and relative MSA by distal reference lumen area and alleviate significant malapposition is important to improve clinical outcome, but overall stent overexpansion may have deleterious effect.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- B Lee
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - B G Kim
- Sanggye Paik Hospital , Seoul , Korea (Republic of)
| | - T G Baraki
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - J S Kim
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - Y J Lee
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - S J Lee
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - S J Hong
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - C M Ahn
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - D H Shin
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - B K Kim
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - Y G Ko
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - D H Choi
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - M K Honh
- Severance Hospital, Cardiology , Seoul , Korea (Republic of)
| | - Y S Jang
- Cha Bundang Medical Center, cardiology , Seongnam , Korea (Republic of)
| |
Collapse
|
3
|
Kim H, Park W, Choi DH, Ahn SJ, Kim SS, Kim ES, Lee JH, Lee KC, Kim JH, Lee HS, Kim JH, Kim MY, Park HJ, Kim K, Song SH, Kwon J, Lee IJ, Kim TH, Kim TG, Chang AR, Cho O, Jeong BK, Ha B, Lee J, Ki Y. Abstract OT2-04-02: A phase 3 study of post-lumpectomy radiotherapy to whole breast + regional lymph nodes vs whole breast alone for patients with pN1 breast cancer treated with taxane-based chemotherapy (KROG 1701): Trial in progress. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-ot2-04-02] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
In patients with early stage breast cancer, regional nodal irradiation (RNI) is added to whole breast irradiation (WBI) in order to control microscopic regional disease and to prevent systemic spread of cancer. According to recent randomized trials (MA.20 and EORTC 22922-10925), prophylactic RNI was associated with improvement in disease-free survival (DFS) in the patients with high-risk node negative or pN1 breast cancer. However, systemic agents now known to improve loco-regional control, such as taxane or endocrine therapy, were prescribed to a small percentage of patients in the studies. The benefit of RNI found in the previous studies might be attributed to incorporation of less effective systemic treatments. The impact of prophylactic RNI in pN1 breast cancer should be evaluated in the patients receiving modern systemic treatment. The current study was conducted to compare the effect of post-lumpectomy WBI vs WBI plus RNI on DFS in pN1 breast cancer patients who received adjuvant taxane-based chemotherapy.
Methods
This study is a multicenter, phase 3, randomized controlled non-inferiority trial (NCT03269981). Eligibility criteria are ≥ 20 years female; pathologically proven invasive carcinoma of the breast; one to three positive axillary lymph nodes (pN1) in pathologic specimen; receiving breast-conserving surgery followed by taxane-based chemotherapy; having adjuvant endocrine therapy or anti-HER2 treatment according to molecular subtype of tumor. Patients are randomly assigned in a 1:1 ratio to receive WBI or WBI plus RNI. Patient randomization was stratified by molecular subtype of tumor (i.e. luminal A/luminal B/luminal HER2/HER2-enriched/triple-negative) and methods of axillary management (i.e. sentinel lymph node biopsy/axillary lymph node dissection). The primary outcome is DFS. The secondary outcomes include DFS according to molecular subtype, treatment-related toxicity, and patient's quality of life per EORTC QLQ-C30 and QLQ-BR23. Patients will be followed for survival and disease recurrence for seven years. A total of 1,926 patients are planned to be enrolled, with recruitment initiated in April 2017. As of June 2018, a total of 236 patients were enrolled.
Acknowledgement
This study was supported by a grant from the National R&D Program for Cancer Control, Ministry of Health & Welfare, Republic of Korea (grant number: HA17C0043010018).
Citation Format: Kim H, Park W, Choi DH, Ahn SJ, Kim SS, Kim ES, Lee JH, Lee KC, Kim JH, Lee H-S, Kim JH, Kim MY, Park HJ, Kim K, Song SH, Kwon J, Lee IJ, Kim TH, Kim TG, Chang AR, Cho O, Jeong BK, Ha B, Lee J, Ki Y. A phase 3 study of post-lumpectomy radiotherapy to whole breast + regional lymph nodes vs whole breast alone for patients with pN1 breast cancer treated with taxane-based chemotherapy (KROG 1701): Trial in progress [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr OT2-04-02.
Collapse
Affiliation(s)
- H Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - W Park
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - DH Choi
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - SJ Ahn
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - SS Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - ES Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - JH Lee
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - KC Lee
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - JH Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - H-S Lee
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - JH Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - MY Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - HJ Park
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - K Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - SH Song
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - J Kwon
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - IJ Lee
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - TH Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - TG Kim
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - AR Chang
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - O Cho
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - BK Jeong
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - B Ha
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - J Lee
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| | - Y Ki
- Samsung Medical Center, Seoul, Republic of Korea; Chonnam National University Medical School, Gwangju, Republic of Korea; Asan Medical Center, Seoul, Republic of Korea; Soonchunhyang University College of Medicine, Cheonan, Republic of Korea; St. Vincent's Hospital, The Catholic University of Korea College of Medicine, Suwon, Republic of Korea; Gachon University Gil Medical Center, Incheon, Republic of Korea; Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Republic of Korea; Dong-A University Hospital, Busan, Republic of Korea; Seoul National University Hospital, Seoul, Republic of Korea; Kyungpook National University Chilgok Hospital, Daegu, Republic of Korea; Hanyang University College of Medicine, Seoul, Republic of Korea; Ewha Womans University Mokdong Hospital, Seoul, Republic of Korea; Kangwon National University School of Medicine, Chuncheon, Republic of Korea; Chungnam National University College of Medicine, Daejeon, Republic of Korea; Gangnam Severance Hospital, Yonsei Univer
| |
Collapse
|
4
|
Kim K, Jeong Y, Shin KH, Kim JH, Ahn SD, Kim SS, Suh CO, Kim YB, Choi DH, Park W, Cha J, Chun M, Lee DS, Lee SY, Kim JH, Park HJ. Abstract P3-12-12: Impact of regional nodal irradiation for breast cancer patients with supraclavicular and/or internal mammary lymph node involvement: A multicenter, retrospective study (KROG 16-14). Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p3-12-12] [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
Purpose: To evaluate the treatment outcomes of radiotherapy (RT) for breast cancer with ipsilateral supraclavicular (SCL) and/or internal mammary (IMN) lymph node involvement.
Methods: A total of 353 patients from 11 institutions were included. One hundred and thirty-six patients had SCL involvement, 148 had IMN involvement, and 69 had both. All patients received neoadjvant systemic therapy followed by breast conserving surgery or mastectomy, and postoperative RT to whole breast/chest wall. As for regional lymph node irradiation, SCL RT was given to 344 patients, and IMN RT to 236 patients. The median RT dose was 50.4 Gy.
Results: The median follow-up duration was 61 months (range, 7-173). In-field progression was present in SCL (n=20) and/or IMN (n=7). The 5-year disease-free survival (DFS) and overall survival rates were 57.8% and 75.1%, respectively. On multivariate analysis, both SCL/IMN involvement, number of axillary lymph node ≥4, triple negative subtype, and mastectomy were significant adverse prognosticators for DFS (p = 0.022, 0.001, 0.001, and 0.004, respectively). Regarding the impact of regional nodal irradiation, SCL RT dose ≥54 Gy was not associated with DFS (5-yr rate, 52.9% vs. 50.9%, p = 0.696) in SCL-involved patients, and the receipt of IMN RT was not associated with DFS (5-yr rate, 56.1% vs. 78.1%, p = 0.099) in IMN-involved patients.
Conclusion: Neoadjuvant chemotherapy followed by surgery and postoperative RT achieved an acceptable in-field regional control rate in patients with SCL and/or IMN involvement. However, a higher RT dose to SCL or IMN RT was not associated with the improved DFS in these patients.
Citation Format: Kim K, Jeong Y, Shin KH, Kim JH, Ahn SD, Kim SS, Suh C-O, Kim YB, Choi DH, Park W, Cha J, Chun M, Lee DS, Lee SY, Kim JH, Park HJ. Impact of regional nodal irradiation for breast cancer patients with supraclavicular and/or internal mammary lymph node involvement: A multicenter, retrospective study (KROG 16-14) [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P3-12-12.
Collapse
Affiliation(s)
- K Kim
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - Y Jeong
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - KH Shin
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - JH Kim
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - SD Ahn
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - SS Kim
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - C-O Suh
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - YB Kim
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - DH Choi
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - W Park
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - J Cha
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - M Chun
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - DS Lee
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - SY Lee
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - JH Kim
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| | - HJ Park
- Ewha Womans University College of Medicine, Seoul, Korea; Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea; Seoul National University College of Medicine, Seoul, Korea; Yonsei Cancer Center, Yonsei University College of Medicine, Seoul, Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Wonju Severance Christian Hospital, Wonju, Korea; Ajou University School of Medicine, Suwon, Korea; Uijeongbu St. Mary's Hospital, The Catholic University of Korea, Uijeongbu, Korea; Chonbuk National University Hospital, Jeonju, Korea; Keimyung University Dongsan Medical Center, Keimyung University School of Medicine, Daegu, Korea; Hanyang University College of Medicine, Seoul, Korea
| |
Collapse
|
5
|
Kim MS, Choi DH, Kwon H, Ahn E, Cho HY, Baek MJ, Shin JE, Moon MJ. Procedural and obstetric outcomes after embryo reduction vs fetal reduction in multifetal pregnancy. Ultrasound Obstet Gynecol 2019; 53:214-218. [PMID: 29418029 DOI: 10.1002/uog.19024] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 01/28/2018] [Accepted: 02/02/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To compare the obstetric outcome and incidence of procedure-related adverse events after embryo reduction (ER) vs fetal reduction (FR), in multifetal pregnancies undergoing reduction to twins or singletons. METHODS We analyzed retrospectively data from multifetal pregnancies that underwent transvaginal ER (n = 181) at a mean gestational age of 7.6 weeks or transabdominal FR (n = 115) at a mean gestational age of 12.9 weeks between December 2006 and January 2017. FR was performed after a detailed fetal anomaly scan. The two groups were compared with respect to obstetric outcomes, such as incidence of miscarriage, early or late preterm delivery, maternal complications and fetal loss, and procedure-related adverse events, including incidence of subchorionic hematoma and procedure-related fetal loss. RESULTS Compared with pregnancies that underwent ER, the incidence of procedure-related fetal loss was lower in the FR group (7.2% vs 0.9%; P = 0.039; odds ratio (OR), 0.12; 95% CI, 0.02-0.89). Mean gestational age at delivery for twins was 34.2 weeks in the ER group and 35.7 weeks in the FR group (P = 0.014). Compared with the ER group, the FR group had lower miscarriage (8.8% vs 2.6%; P = 0.045; OR, 0.28; 95% CI, 0.08-0.97) and overall fetal loss (13.3% vs 5.2%; P = 0.031; OR, 0.36; 95% CI, 0.14-0.91) rates. CONCLUSIONS The FR procedure is, overall, a better and safer approach to reducing morbidity and mortality in multifetal pregnancies. Spontaneous demise of one fetus may occur after ER, and FR has the advantage that chorionic villus sampling and ultrasound screening for increased nuchal translucency and anatomical defects can be conducted before the procedure. The ER approach is still reasonable when a patient's religious or other ethical concerns are of primary importance. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.
Collapse
Affiliation(s)
- M S Kim
- Department of Obstetrics and Gynecology, CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - D H Choi
- Fertility Center of CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - H Kwon
- Fertility Center of CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - E Ahn
- Department of Obstetrics and Gynecology, CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - H Y Cho
- Department of Obstetrics and Gynecology, CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - M J Baek
- Department of Obstetrics and Gynecology, CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - J E Shin
- Fertility Center of CHA Bundang Medical Center, Seongnam, Republic of Korea
| | - M J Moon
- Department of Obstetrics and Gynecology, CHA Bundang Medical Center, Seongnam, Republic of Korea
| |
Collapse
|
6
|
Seo JW, Park SH, Lee CJ, Choi DH. 422Comparison of the prognostic significance of blood pressure measurement by unattended automatic office blood pressure and ambulatory blood pressure in subjects with chronic kidney disease. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- J W Seo
- Yonsei Cardiovascular Center, Seoul, Korea Republic of
| | - S H Park
- Yonsei Cardiovascular Center, Seoul, Korea Republic of
| | - C J Lee
- Yonsei Cardiovascular Center, Seoul, Korea Republic of
| | - D H Choi
- Yonsei Cardiovascular Center, Seoul, Korea Republic of
| |
Collapse
|
7
|
|
8
|
Mittal K, Choi DH, Maganti N, Ogden A, Melton BD, Kaur J, Gupta MV, Jonsdottir K, Janseen EAM, Aleskandarany MA, Rakha EA, Rida PCG, Aneja R. Abstract P1-01-23: Hypoxia induced centrosome amplification via HIF-1α/Plk4 signaling axis associates with poorer overall survival in TNBC. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p1-01-23] [Citation(s) in RCA: 1] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Centrosome amplification (CA) which refers to presence of supernumerary or abnormally large centrosomes drives tumor progression by promoting chromosomal instability and the generation of aggressive tumor clones. Although the role of CA in cancer progression is well-defined, no studies have yet discussed how CA is induced in tumor cells. We report here that intra-tumoral hypoxia, which is considered one of the major contributors to intratumor heterogeneity, induces CA via HIF-1α.
Methods: We first immunohistochemically labeled 24 breast carcinoma and uninvolved adjacent normal tissue samples for HIF-1α and calculated weighted indices (WIs) for nuclear HIF-1α. Adjacent serial sections from the same tumors were also immunofluorescently labeled for γ-tubulin and CA was calculated. Using public microarray datasets (Kao dataset, n=327), we investigated whether centrosomal gene expression is enriched in breast tumors characterized by a hypoxia gene expression signature. Finally, to determine the role of hypoxia in CA induction we exposed cultured TNBC cells (MDA-MB-231 and MDA-MB-468) to hypoxia and overexpressed (OE) and knocked out (KO) HIF-1α in TNBC cells and quantitated CA. Additionally, to discern the biological pathway through which HIF-1α induces CA we performed ChIP assay and in silico analyses to identify the possible targets of HIF-1α.
Results: A strong positive correlation between nuclear HIF-1α WI and CA was found in breast tumor samples (Spearman's rho p=0.722, p<0.001). In addition, we found that higher nuclear HIF-1α was associated with worse overall survival (p=0.041; HR=1.03). Our in silico findings suggest that breast tumors with high expression of hypoxia-associated genes exhibited higher expression of centrosomal genes than breast tumors with low expression of hypoxia-associated genes. In addition, cells cultured in hypoxic conditions exhibited ˜1.5 fold higher (p<0.05) CA when compared to the cells cultured in normoxic conditions. Interestingly level of CA decreased when HIF-1α KO TNBC cells were exposed to hypoxia and it increased when HIF-1α OE TNBC cells were culture in normoxic conditions. Furthermore, we discovered that HIF-1α induced CA by directly regulating the expression of Plk4 which was confirmed by performing ChIP assay. Our results indicated HIF-1α interaction with the motif in the PLK4 promoter from genomic DNA of MDA-MB 231 cells under hypoxic conditions, was significantly (p=0.04) higher when compared with the cells cultured under normoxic conditions. Plk4 mRNA expression was assessed using the online BC gene expression data sets (n=25). We found significantly higher expression of Plk4 in TNBC (n=374) when compared with non-TNBC (n=4098) and it was associated with poor overall survival (HR=1.76; p=0.054) in TNBC.
Conclusion: Collectively our findings suggest that hypoxia drives CA in TNBC via HIF-1α and contribute to poor outcomes. Thus, determination of CA and HIF-1α can help risk stratification in TNBC patients for more personalized treatments.
Citation Format: Mittal K, Choi DH, Maganti N, Ogden A, Melton BD, Kaur J, Gupta MV, Jonsdottir K, Janseen EAM, Aleskandarany MA, Rakha EA, Rida PCG, Aneja R. Hypoxia induced centrosome amplification via HIF-1α/Plk4 signaling axis associates with poorer overall survival in TNBC [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P1-01-23.
Collapse
Affiliation(s)
- K Mittal
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - DH Choi
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - N Maganti
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - A Ogden
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - BD Melton
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - J Kaur
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - MV Gupta
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - K Jonsdottir
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - EAM Janseen
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - MA Aleskandarany
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - EA Rakha
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - PCG Rida
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| | - R Aneja
- Georgia State University, Atlanta, GA; West Georgia Hospital; Stavanger University Hospital, Norway; University of Nottingham and Nottingham University Hospitals NHS Trust
| |
Collapse
|
9
|
|
10
|
Kim H, Cho DY, Choi DH, Jung GH, Shin I, Park W, Huh SJ, Nam SJ, Lee JE, Gil WH, Kim SW. Abstract P1-08-08: Heterozygous germline mutations in RAD50 among Korean patients with high-risk breast cancer negative for BRCA1/2 mutation. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p1-08-08] [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
Background: The MRE11-RAD50-nibrin (MRN) complex participates in pathways of double-strand break induced DNA repair and cell cycle checkpoint control. RAD50 interacts with the MRE11 and NBS proteins, is involved in the maintenance of genomic integrity. The association of RAD50 mutation and breast cancer susceptibility has been reported in European patients. However, the impact of RAD50 mutation on a breast cancer predisposition among Koreans remains uncertain. In the current analysis, we evaluated the incidence of RAD50 mutations among Korean patients with non-BRCA1/2 high-risk breast cancer.
Materials and Methods: A total of 247 Korean patients with high-risk breast cancer who tested negative for BRCA1/2 mutation were enrolled. The criteria for high-risk breast cancer were as follows: having a family history of breast or ovarian cancer in any relative; diagnosed at age 40 years or younger; bilateral breast cancer; and male breast cancer. All participants were screened for BRCA1/2 mutations using fluorescent-conformation sensitive capillary electrophoresis (F-CSCE) and traditional sequencing. The entire RAD50 gene of each patient was sequenced using F-CSCE. In silico analyses of the RAD50 variants was performed using PolyPhen-2 and SIFT.
Results: There were two novel deleterious mutations in RAD50 (p.Q426X, p.E1271del). These mutations were found in two patients, including one with p.Q426X and the other with p.E1271del. Besides, five sequence variants in RAD50 were identified: four exonic variants (p.I118T, p.R486C, p.L1264F, and p.R1279H) and one intronic variant (c.1246-11T>C). Among the four missense variants, p.R486C and p.L1264F were variants predicted to be deleterious by in silico analyses.
Conclusions: We found protein-truncating mutations in RAD50 gene in a small proportion of Korean patients with high-risk breast cancer. The contribution of the mutation to the development of breast cancer should be clarified in further researches.
Citation Format: Kim H, Cho D-Y, Choi DH, Jung GH, Shin I, Park W, Huh SJ, Nam SJ, Lee JE, Gil WH, Kim SW. Heterozygous germline mutations in RAD50 among Korean patients with high-risk breast cancer negative for BRCA1/2 mutation. [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 P1-08-08.
Collapse
Affiliation(s)
- H Kim
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - D-Y Cho
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - DH Choi
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - GH Jung
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - I Shin
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - W Park
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - SJ Huh
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - SJ Nam
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - JE Lee
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - WH Gil
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - SW Kim
- Hallym University Dongtan Sacred Heart Hospital, Hwaseong, Republic of Korea; LabGenomics Clinical Research Institute, LabGenomics, Seongnam, Republic of Korea; Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| |
Collapse
|
11
|
Lim TH, Cho YA, Choi DH. Effects of cilostazol on the pharmacokinetics of carvedilol after oral and intravenous administration in rats. J Physiol Pharmacol 2015; 66:591-597. [PMID: 26348083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 06/02/2015] [Indexed: 06/05/2023]
Abstract
This study was designed to investigate the effects of cilostazol on the pharmacokinetics of carvedilol following oral or intravenous administration of carvedilol in rats. Clinically carvedilol and cilostazol can be prescribed for treatment of cardiovascular diseases. Carvedilol and cilostazol are all substrates of CYP2C9 enzymes. Carvedilol was administered orally or intravenously without or with oral administration of cilostazol to rats. The effects of cilostazol on cytochrome P450 (CYP) 2C9 activity and P-gp activity were also evaluated. Cilostazol inhibited CYP2C9 activity in a concentration-dependent manner with 50% inhibitory concentration (IC(50)) of 8.7 μM. Compared with the control group, the area under the plasma concentration-time curve (AUC) of carvedilol was significantly (P < 0.05) increased by 38.0%. The peak concentration (C(max)) was significantly (P < 0.05) increased by 49.2% in the presence of cilostazol after oral administration of carvedilol. Consequently, the relative bioavailability (R.B.) of carvedilol was increased by 1.15 - 1.38-fold, and the absolute bioavailability (A.B.) of carvedilol in the presence of cilostazol was significantly (P < 0.05) higher than that of the control. After intravenous administration, the AUC of carvedilol was significantly (P < 0.05) increased by 19.2% compared to that in the control by cilostazol. These results suggest that cilostazol effectively inhibited the metabolism of carvedilol. The increased oral bioavailability of carvedilol might be due to the inhibition of CYP2C9-mediated metabolism of carvedilol in the liver by cilostazol.
Collapse
Affiliation(s)
- T H Lim
- Department of Pharmacy, Chosun University Hospital, Gwangju, Republic of Korea
| | - Y A Cho
- Biomedical Research Institute, Kyeongsang National University Hospital, Jinju, Republic of Korea
| | - D H Choi
- Department of Internal Medicine, School of Medicine, Chosun University, Gwangju, Republic of Korea.
| |
Collapse
|
12
|
Cho S, Shin EH, Kim J, Ahn SH, Chung K, Kim DH, Han Y, Choi DH. SU-E-T-569: Neutron Shielding Calculation Using Analytical and Multi-Monte Carlo Method for Proton Therapy Facility. Med Phys 2015. [DOI: 10.1118/1.4924931] [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: 11/07/2022] Open
|
13
|
Kim TG, Park W, Choi DH, Kim SH, Kim HC, Lee WY, Park JO, Park YS. The adequacy of the distal resection margin after preoperative chemoradiotherapy for rectal cancer. Colorectal Dis 2014; 16:O257-63. [PMID: 24422744 DOI: 10.1111/codi.12554] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [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: 04/02/2013] [Accepted: 10/20/2013] [Indexed: 02/08/2023]
Abstract
AIM The study aimed to determine the adequacy of the distal margin in patients having preoperative chemoradiotherapy (CRT) followed by restorative surgery for rectal cancer. METHOD A total of 368 patients with locally advanced rectal cancer treated for cure at our institution between July 1999 and March 2009 were included in the study. All underwent preoperative CRT and sphincter-sparing surgery. The distal margin and other factors were examined for their effect on recurrence and survival. The median duration of follow-up was 48 months. RESULTS The length of distal margin ranged from 0 to 9.0 cm (median 1.5 cm). The pelvic control and disease-free survival rates at 5 years for patients with a margin of ≤ 3 mm were no different from those in whom it was > 3 mm (P = 0.6 and 0.8). The 5-year pelvic control rates between the ≤ 3 mm and > 3 mm groups were 66.7 and 86.2% in patients with a ypT3-4 tumour (P = 0.049) and 70.0 and 89.1% in patients who showed no response to CRT (P = 0.039). CONCLUSION The results suggest that a distal margin of < 3 mm in the surgical specimen after preoperative CRT is associated with a lower rate of pelvic tumour control at 5 years in patients with Stage ypT3-4 tumours or in those who do not respond to CRT.
Collapse
Affiliation(s)
- T G Kim
- Department of Radiation Oncology, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Changwon, Korea
| | | | | | | | | | | | | | | |
Collapse
|
14
|
Noh JM, Park W, Suh CO, Keum KC, Kim YB, Shin KH, Kim K, Chie EK, Ha SW, Kim SS, Ahn SD, Shin HS, Kim JH, Lee HS, Lee NK, Huh SJ, Choi DH. Is elective nodal irradiation beneficial in patients with pathologically negative lymph nodes after neoadjuvant chemotherapy and breast-conserving surgery for clinical stage II-III breast cancer? A multicentre retrospective study (KROG 12-05). Br J Cancer 2014; 110:1420-6. [PMID: 24481403 PMCID: PMC3960607 DOI: 10.1038/bjc.2014.26] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [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: 11/05/2013] [Revised: 12/29/2013] [Accepted: 01/08/2014] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND To evaluate the effects of elective nodal irradiation (ENI) in clinical stage II-III breast cancer patients with pathologically negative lymph nodes (LNs) (ypN0) after neoadjuvant chemotherapy (NAC) followed by breast-conserving surgery (BCS) and radiotherapy (RT). METHODS We retrospectively analysed 260 patients with ypN0 who received NAC followed by BCS and RT. Elective nodal irradiation was delivered to 136 (52.3%) patients. The effects of ENI on survival outcomes were evaluated. RESULTS After a median follow-up period of 66.2 months (range, 15.6-127.4 months), 26 patients (10.0%) developed disease recurrence. The 5-year locoregional recurrence-free survival and disease-free survival (DFS) for all patients were 95.5% and 90.5%, respectively. Pathologic T classification (0-is vs 1 vs 2-4) and the number of LNs sampled (<13 vs ≥13) were associated with DFS (P=0.0086 and 0.0012, respectively). There was no significant difference in survival outcomes according to ENI. Elective nodal irradiation also did not affect survival outcomes in any of the subgroups according to pathologic T classification or the number of LNs sampled. CONCLUSIONS ENI may be omitted in patients with ypN0 breast cancer after NAC and BCS. But until the results of the randomised trials are available, patients should be put on these trials.
Collapse
Affiliation(s)
- J M Noh
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 135-710, Republic of Korea
| | - W Park
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 135-710, Republic of Korea
| | - C-O Suh
- Department of Radiation Oncology, Yonsei Cancer Center, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea
| | - K C Keum
- Department of Radiation Oncology, Yonsei Cancer Center, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea
| | - Y B Kim
- Department of Radiation Oncology, Yonsei Cancer Center, Severance Hospital, Yonsei University College of Medicine, 50-1 Yonsei-ro, Seodaemun-gu, Seoul 120-752, Republic of Korea
| | - K H Shin
- Proton Therapy Center, Research Institute and Hospital, National Cancer Center, 323 Ilsan-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 410-769, Republic of Korea
| | - K Kim
- Department of Radiation Oncology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea
| | - E K Chie
- Department of Radiation Oncology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea
| | - S W Ha
- Department of Radiation Oncology, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799, Republic of Korea
| | - S S Kim
- Department of Radiation Oncology, Asan Medical Center, University of Ulsan, College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
| | - S D Ahn
- Department of Radiation Oncology, Asan Medical Center, University of Ulsan, College of Medicine, 88 Olympic-ro 43-gil, Songpa-gu, Seoul 138-736, Republic of Korea
| | - H S Shin
- Department of Radiation Oncology, Bundang CHA Hospital, School of Medicine, CHA University, 59 Yatap-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-712, Republic of Korea
| | - J H Kim
- Department of Radiation Oncology, Dongsan Medical Center, Keimyung University School of Medicine, 56 Dalseong-ro, Jung-gu, Daegu 700-712, Republic of Korea
| | - H-S Lee
- Department of Radiation Oncology, Dong-A University Hospital, Dong-A University School of Medicine, 26 Daesingongwon-ro, Seo-gu, Busan 602-715, Republic of Korea
| | - N K Lee
- Department of Radiation Oncology, Korea Medical Center, Korea University School of Medicine, 73 Inchon-ro, Seongbuk-gu, Seoul 136-705, Republic of Korea
| | - S J Huh
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 135-710, Republic of Korea
| | - D H Choi
- Department of Radiation Oncology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul 135-710, Republic of Korea
| |
Collapse
|
15
|
Kim JH, Choi DH, Park W, Ha SW, Kim K, Ye JW, Suh CO, Shin KH, Kim DW, Lee JH. Abstract P5-16-03: Influence of radiotherapy boost in patients with ductal carcinoma in situ of breast cancer: A multicenter, retrospective study in Korea (KROG 11-04). Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p5-16-03] [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
Purpose
We aimed to estimate the effect of boost radiotherapy on local relapse-free survival (LRFS) in patients with ductal carcinoma in situ (DCIS) of breast cancer.
Material and Methods
We included patients from 8 institutions who met the following inclusion criteria: having tumor status Tis, age 18 years or older at diagnosis, having had breast conserving surgery (BCS) and radiotherapy within 12 weeks after surgery. From January 1995 through December 2006, 594 patients with DCIS breast cancer treated with BCS and radiotherapy were analyzed retrospectively in a study by Korean Radiation Oncology Group (KROG). All patients received whole breast radiotherapy (median 5040 cGy) after BCS. Among them, 154 patients (25.9%) received boost radiotherapy (median 1000 cGy) after whole breast radiotherapy. Patients who received boost radiotherapy had higher tumor grade, more comedo pattern and less papillary pattern. Other patients’ or tumor characteristics were not statistically different between boost group and no boost group.
Results
After median follow-up of 89 months (range 26-200), 5 year and 10 year LRFS was 98.3% and 95.6%. There was no statistically significant difference of LRFS between boost group and no boost group.
Local relapse free survival according to boost radiotherpay 5-year LRFS* (%)10-year LRFS (%)p-value**Boost group98.196.20.626No boost group98.495.4 *Local relapse free survival, **Log-rank test
Nineteen (3.2%) patients had ipsilateral breast recurrences, of whom, 12 patients had invasive breast cancer and 7 had DCIS. Positive HER2 receptor was associated with higher invasive recurrences.
Ipsilateral breast recurrences according to HER2 receptor TotalHER2 receptor (+)HER2 receptor (-)p-value*Ipsilateral breast121110.017Invasive8800.023DCIS**4310.642*Fisher's exact test, **Ductal carcinoma in situ
Nine (1.5%) patients developed contralateral breast cancer, of whom, 6 were invasive breast cancer and 3 were DCIS. On multivariate analysis, only margin status was a significant prognostic factor for LRFS.
Conclusion
In the absence of randomized trials, boost radiotherapy could not decrease local recurrence in DCIS of breast cancer after BCS and radiotherapy. In addition, patients with positive HER2 receptor would need further treatment like target agent, trastuzumab. NSABP B-43 study result would answer the question.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-16-03.
Collapse
Affiliation(s)
- JH Kim
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - DH Choi
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - W Park
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - SW Ha
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - K Kim
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - JW Ye
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - C-O Suh
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - KH Shin
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - DW Kim
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| | - JH Lee
- Dongsan Medical Center Keimyung University School of Medicine; Samsung Medical Center Sungkyunkwan University School of Medicine; Seoul National University Hospital; Yeungnam University Medical Center; Severance Hospital Yonsei University College of Medicine; National Cancer Center; Pusan National University Hospital; Ewha Womans University Mokdong Hospital
| |
Collapse
|
16
|
Choi JS, Choi JS, Choi DH. Effects of licochalcon A on the pharmacokinetics of losartan and its active metabolite, EXP-3174, in rats. Pharmazie 2013; 68:882-888. [PMID: 24380237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Losartan and licochalcon A interact with cytochrome P-450 (CYP) enzymes and P-glycoprotein (P-gp), and the increase in the use of health supplements may result in licochalcon A being taken concomitantly with losartan to treat or prevent cardiovascular diseases as a combination therapy. The effect of licochalcon A, a natural flavonoid, on the pharmacokinetics of losartan and its active metabolite, EXP-3174, was investigated in rats. Pharmacokinetic parameters of losartan and EXP-3174 were determined after oral administration of losartan (9 mg/kg) to rats in the presence or absence of licochalcon A (0.5, 2.5 and 10 mg/kg). The effect of licochalcon A on P-glycoprotein (P-gp) as well as CYP3A4 and 2C9 activities was also evaluated. Licochalcon A inhibited CYP3A4 and CYP2C9 enzyme activities with 50% inhibition concentrations (IC50) of 2.0 and 0.1 microM, respectively. In addition, licochalcon A significantly enhanced the cellular accumulation of rhodamine-123 in a concentration-dependent manner in MCF-7/ADR cells overexpressing P-gp. The pharmacokinetic parameters of losartan were significantly altered by licochalcon A. Licochalcon A (2.5 mg/kg or 10 mg/kg) increased AUC0-infinity of losartan by 33.4-63.2% and Cmax of losartan by 34.0-62.8%. The total body clearance (CL/F) was significantly decreased (2.5 mg/kg, p < 0.05; 10 mg/kg, p < 0.01) by licochalcon A. Consequently, the absolute bioavailability of losartan in the presence of licochalcon A increased significantly (2.5 mg/kg, p < 0.05; 10 mg/kg, p < 0.01) compared to that in the control group. The relative bioavailability (R.B.) of losartan was 1.15- to 1.63-fold greater than that of the control group. However, there was no significant change in Tmax and t1/2 of losartan in the presence of licochalcon A. Licochalcon A (10 mg/kg) increased the AUC0-infinity of EXP-3174 but this was not significant. Furthermore, concurrent use of licochalcon A (10 mg/kg) significantly decreased the metabolite-parent AUC ratio (M.R.) by 20%, suggesting that licochalcon A inhibited the CYP-mediated metabolism of losartan to its active metabolite, EXP-3174. In conclusion, the enhanced oral bioavailability of losartan in the presence of licochalcon A may mainly result from decreased P-gp-mediated efflux transporter in the small intestine and from the inhibition of CYP 3A- and CYP2C9-mediated metabolism in the small intestine and liver and/or from the reduction of total body clearance of losartan by licochalcon A.
Collapse
Affiliation(s)
- J S Choi
- Department of Food and Drug, Chosun University, Gwangju, Republic of Korea
| | - J S Choi
- College of Pharmacy, Chosun University, Gwangju, Republic of Korea
| | - D H Choi
- College of Medicine, Chosun University, Gwangju, Republic of Korea
| |
Collapse
|
17
|
Choi DH, Wang Q, Azuma Y, Majima Y, Warner JH, Miyata Y, Shinohara H, Kitaura R. Fabrication and characterization of fully flattened carbon nanotubes: a new graphene nanoribbon analogue. Sci Rep 2013; 3:1617. [PMID: 23563618 PMCID: PMC3619137 DOI: 10.1038/srep01617] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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: 01/08/2013] [Accepted: 03/22/2013] [Indexed: 11/24/2022] Open
Abstract
Graphene nanoribbons (GNR) are one of the most promising candidates for the fabrication of graphene-based nanoelectronic devices such as high mobility field effect transistors (FET). Here, we report a high-yield fabrication of a high quality another type of GNR analogue, fully flattened carbon nanotubes (flattened CNTs), using solution-phase extraction of inner tubes from large-diameter multi-wall CNTs (MWCNTs). Transmission electron microscopy (TEM) observations show that flattened CNTs have width of typically 20 nm and a barbell-like cross section. Measurements of the low-bias conductance of isolated flattened CNTs as a function of gate voltage shows that the flattened CNTs display ambipolar conduction which is different from those of MWCNTs. The estimated gap based on temperature dependence of conductivity measurements of isolated flattened CNTs is 13.7 meV, which is probably caused by the modified electronic structure due to the flattening.
Collapse
Affiliation(s)
- D H Choi
- Department of Chemistry, Nagoya University, Nagoya, Japan
| | | | | | | | | | | | | | | |
Collapse
|
18
|
Lee SH, Jung YS, Chung JY, Oh AY, Lee SJ, Choi DH, Jang SM, Jang KS, Paik SS, Ha NC, Park BJ. Novel tumor suppressive function of Smad4 in serum starvation-induced cell death through PAK1-PUMA pathway. Cell Death Dis 2011; 2:e235. [PMID: 22130069 PMCID: PMC3252743 DOI: 10.1038/cddis.2011.116] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [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] [Indexed: 01/06/2023]
Abstract
DPC4 (deleted in pancreatic cancer 4)/Smad4 is an essential factor in transforming growth factor (TGF)-β signaling and is also known as a frequently mutated tumor suppressor gene in human pancreatic and colon cancer. However, considering the fact that TGF-β can contribute to cancer progression through transcriptional target genes, such as Snail, MMPs, and epithelial–mesenchymal transition (EMT)-related genes, loss of Smad4 in human cancer would be required for obtaining the TGF-β signaling-independent advantage, which should be essential for cancer cell survival. Here, we provide the evidences about novel role of Smad4, serum-deprivation-induced apoptosis. Elimination of serum can obviously increase the Smad4 expression and induces the cell death by p53-independent PUMA induction. Instead, Smad4-deficient cells show the resistance to serum starvation. Induced Smad4 suppresses the PAK1, which promotes the PUMA destabilization. We also found that Siah-1 and pVHL are involved in PAK1 destabilization and PUMA stabilization. In fact, Smad4-expressed cancer tissues not only show the elevated expression of PAK1, but also support our hypothesis that Smad4 induces PUMA-mediated cell death through PAK1 suppression. Our results strongly suggest that loss of Smad4 renders the resistance to serum-deprivation-induced cell death, which is the TGF-β-independent tumor suppressive role of Smad4.
Collapse
Affiliation(s)
- S-H Lee
- Department of Molecular Biology, College of Natural Science, Pusan National University, Busan, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Lee S, Nam DH, Lee JI, Park W, Choi DH, Huh SJ, Park YH, Ahn JS, Im YH. Abstract P6-13-05: Differences of Clinical Manifestations and Therapeutic Outcomes in Leptomeningeal Metastases (LM) According to Breast Cancer Subtypes. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p6-13-05] [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
Backgrounds: Breast cancer is the solid tumor most commonly associated with leptomeningeal metastases (LM). Therapeutic modalities include intrathecal and systemic chemotherapy, radiotherapy and other palliative modality including placement of a ventricular reservoir. The aim of this study is to characterize clinical feature and outcomes of LM according to breast cancer subtypes in conjunction with whole CNS metastases.
Methods: A retrospective study was performed on breast cancer patients with LM who received palliative management at Samsung Medical Center between 1994 and 2008. Among 281 metastatic breast cancer patients, 71 breast cancer patients with LM were identified. They were divided into three biological subgroups. The propensity of biological subtypes for LM, clinical manifestation including recursive partitioning analysis of Radiation Therapy Oncology Group (RPA RTOG) prognostic class, and therapeutic outcomes were assessed.
Results: The median age was 48 (range 26-70) years. The rates of the patients with triple negative breast cancer (TNBC), human epidermal growth factor receptors 2 (HER2)-positive and hormone receptor (HR)- positive subtype breast cancer were 26 (44%), 15 (25%) and 18 (31%), respectively. Sixty-four patients (90%) had metastatic disease at sites other than LM. TNBC were more common in RPA RTOG prognostic class III than those in HER2 and HR-positive subtypes (61% vs 39% vs 0%, P<0.0001). CNS including LM was the first site of distant metastasis in 65% of the TNBC patients. Treatment includes intrathecal chemotherapy (IT), whole brain radiotherapy (WBRT), and systemic chemotherapy. The median survival duration from the diagnosis of LM to death (OS-LM) was 4.5 months (range 0.2-26.4 months). Main causes of death were deterioration of neurologic sequelae associated with LM (55%), systemic disease progression (27%), and et cetera (18%). Death rates related with LM at each subtype were 64% for TNBC, 36% for HER2-positive, and 0% for HR-positive patients (p=0.060). In the univariate analysis, RPA RTOG classification (p=0.003), systemic disease control at LM (p=0.041), cytologic negative conversion to IT (p=0.001), systemic chemotherapy after LM diagnosis (p=0.002), and combined modality for LM treatment (p=0.005) were singled out as having prognostic value for OS-LM. Cox-regression multivariate analysis showed that RPA class (HR (Hazard Ratio) 1.8, p=0.022), cytologic negative conversion to IT (HR 0.4, p=0.043), and systemic chemotherapy (HR 0.24, p=0.004) are identified as independent prognostic factors.
Conclusion: TNBC and HER2-positive breast cancer appeared to have special predilection for LM as well as brain parenchymal metastases. High RPA class of TNBC may reflect more aggressive tumor biology in this sanctuary area. OS-LM depended on RPA class, cytologic negative conversion, and the use of systemic chemotherapy. The role of systemic chemotherapy and active local treatment modalities according to subtypes should be defined to improve dismal prognosis.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P6-13-05.
Collapse
|
20
|
Haffty BG, Choi DH, Goyal S, Silber A, Ranieri K, Matloff E, Lee MH, Nissenblatt M, Toppmeyer D, Moran MS. Breast cancer in young women (YBC): prevalence of BRCA1/2 mutations and risk of secondary malignancies across diverse racial groups. Ann Oncol 2009; 20:1653-9. [PMID: 19491284 DOI: 10.1093/annonc/mdp051] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Despite significant differences in age of onset and incidence of breast cancer between Caucasian (CA), African-American (AA) and Korean (KO) women, little is known about differences in BRCA1/2 mutations in these populations. The purpose of this study is to evaluate the prevalence of BRCA1/2 mutations and the association between BRCA1/2 mutation status and secondary malignancies among young women with breast cancer in these three racially diverse groups. METHODS Patients presenting to our breast cancer follow-up clinics selected solely on having a known breast cancer diagnosis at a young age (YBC defined as age <45 years at diagnosis) were invited to participate in this study. A total of 333 eligible women, 166 CA, 66 AA and 101 KO underwent complete sequencing of BRCA1/2 genes. Family history (FH) was classified as negative, moderate or strong. BRCA1/2 status was classified as wild type (WT), variant of uncertain significance (VUS) or deleterious (DEL). RESULTS DEL across these three racially diverse populations of YBC were nearly identical: CA 17%, AA 14% and KO 14%. The type of DEL differed with AA having more frequent mutations in BRCA2, compared with CA and KO. VUS were predominantly in BRCA2 and AA had markedly higher frequency of VUS (38%) compared with CA (10%) and KO (12%). At 10-year follow-up from the time of initial diagnosis of breast cancer, the risk of secondary malignancies was similar among WT (14%) and VUS (16%), but markedly higher among DEL (39%). CONCLUSIONS In these YBC, the frequency of DEL in BRCA1/2 is remarkably similar among the racially diverse groups at 14%-17%. VUS is more common in AA, but aligns closely with WT in risk of second cancers, age of onset and FH.
Collapse
Affiliation(s)
- B G Haffty
- Department of Radiation Oncology, UMDNJ-RWJMS and Cancer Institute of New Jersey, New Brunswick, NJ 08901, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Park JW, Sohn DK, Hong CW, Han KS, Choi DH, Chang HJ, Lim SB, Choi HS, Jeong SY. The usefulness of preoperative colonoscopic tattooing using a saline test injection method with prepackaged sterile India ink for localization in laparoscopic colorectal surgery. Surg Endosc 2007; 22:501-5. [PMID: 17704874 DOI: 10.1007/s00464-007-9495-2] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.9] [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: 04/11/2007] [Revised: 05/24/2007] [Accepted: 06/12/2007] [Indexed: 02/07/2023]
Abstract
BACKGROUND Laparoscopic surgery for colorectal neoplasm requires precise tumor localization. The authors have assessed the safety and efficacy of colonoscopic tattooing using a saline test injection method with prepackaged sterile India ink for tumor localization in laparoscopic colorectal surgery. METHODS Between July 2004 and January 2007, 63 patients underwent colonoscopic tattooing using prepackaged sterile India ink before laparoscopic surgery of colorectal tumors. Patient medical records and operation videos were retrospectively assessed. RESULTS Tattoos were visualized intraoperatively in 62 (98.4%) of the 63 patients, and colorectal tumors were accurately localized in 61 patients (96.8%). In one patient, the tattoo could not be detected, whereas in another patient, it was visualized but the serosal surface of the rectosigmoid colon was stained diffusely. Both of these patients underwent intraoperative colonoscopy. Localized leakages of ink were identified in six patients (9.5%) during surgery. However, five of these patients had no symptoms, and the sixth patient, who underwent polypectomy and tattooing simultaneously, felt mild chilling without fever or abdominal pain. CONCLUSIONS Preoperative colonoscopic tattooing using a saline test injection method with prepackaged sterile India ink is a safe and effective method for tumor localization in laparoscopic colorectal surgery.
Collapse
Affiliation(s)
- J W Park
- Center for Colorectal Cancer, Research Institute and Hospital, National Cancer Center, 809 Madu-dong, Ilsan-gu, Goyang, Gyeonggi, 411-769, Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Yang MK, Kim JA, Ahn HJ, Choi DH. Influence of the baricity of a local anaesthetic agent on sedation with propofol during spinal anaesthesia. Br J Anaesth 2007; 98:515-8. [PMID: 17347181 DOI: 10.1093/bja/aem038] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND This study examined the effect of different levels of spinal anaesthesia, induced by solutions of different baricity but containing the same amount of local anaesthetic agent, on the requirement for sedation with propofol. METHODS Thirty-six patients undergoing varicose vein surgery under spinal anaesthesia were randomly allocated to receive tetracaine 15 mg in 3 ml of either glucose 5% (hyperbaric) or CSF (isobaric). I.V. propofol was started 5 min after the intrathecal injection and was titrated to maintain a bispectral index (BIS) score of 65-75. The propofol requirements to maintain this range in the two groups were compared every 5 min. RESULTS The propofol requirement was always lower in the hyperbaric group, with the differences becoming statistically significant 20 min after the intrathecal injection. Total consumption of propofol over the 55 min of the study was also less in the hyperbaric group. CONCLUSION The known difference in level of spinal anaesthetic block induced by solutions of different baricity, but the same dose of local anaesthetic, was associated with different requirements for propofol sedation as determined by BIS assessment.
Collapse
Affiliation(s)
- M K Yang
- Department of Anesthesiology and Pain Medicine, Samsung Medical Center, School of Medicine, Sungkyunkwan University, Seoul, Korea
| | | | | | | |
Collapse
|
23
|
Abstract
Paraesthesia during regional anaesthesia is an unpleasant sensation for patients and, more importantly, in some cases it is related to neurological injury. Relatively few studies have been conducted on the frequency of paraesthesia during combined spinal epidural anaesthesia. We compared two combined spinal epidural anaesthesia techniques: the needle-through-needle technique and the double segment technique in this respect. We randomly allocated 116 parturients undergoing elective Caesarean section to receive anaesthesia using one of these techniques. Both techniques were performed using a 27G pencil point needle, an 18G Tuohy needle, and a 20G multiport epidural catheter from the same manufacturer. The overall frequency of paraesthesia was higher in the needle-through-needle technique group (56.9% vs. 31.6%, p = 0.011). The frequency of paraesthesia at spinal needle insertion was 20.7% in the needle-through-needle technique group and 8.8% in the double segment technique group; whereas the frequency of paraesthesia at epidural catheter insertion was 46.6% in the needle-through-needle technique group and 24.6% in the double segment technique group.
Collapse
Affiliation(s)
- H J Ahn
- Department of Anaesthesiology and Pain Medicine, Samsung Medical Centre, Sungkyunkwan University School of Medicine, 135-710, 50 Ilwon-dong, Kangnam-ku, Seoul, Korea.
| | | | | |
Collapse
|
24
|
Kim JH, Lee HJ, Yeon SC, Choi DH, Lee SS, Kang JK, Chae CH, Paik NW, Lee KH, Cho MH. Antioxidative effects of 7-hydroxy-3-methoxy-cadalene extracted fromZelkova serrata on 4-(methylinitros amino)-1-(3-pyridyl)-1-butanone-induced oxidative stress in A/J mice. Phytother Res 2004; 18:425-7. [PMID: 15174006 DOI: 10.1002/ptr.1427] [Citation(s) in RCA: 6] [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: 11/06/2022]
Abstract
Effects of 7-hydroxy-3-methoxy-cadalene (cadalene) extracted from Zelkova serrata on 4-(methylinitrosamino)-1-(3-pyridyl)-1-butanone (NNK)-induced oxidative stress were examined using A/J mice. NNK (65 microg/ml water) was orally administered to 20 mice for 7 weeks, followed by free feeding of a commercial diet, not containing cadalene, for 2 weeks. The control group was maintained without NNK and cadalene administration, and treatment groups with NNK and cadalene (6.25, 25, 100 mg/kg feed) feeding for 25 weeks. The glutathione concentration of cadalene-treated (65 microg/ml water) group was significantly higher than that of the group treated only with NNK (p < 0.05). The results of our study strongly indicate that cadalene exerts antioxidative effect on NNK-induced lung tumorigenesis in A/J mice.
Collapse
Affiliation(s)
- J H Kim
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Park CH, Lee JJ, Oh SK, Song YC, Choi DH, Park KH. Iris Feature Extraction and Matching Based on Multiscale and Directional Image Representation. Scale Space Methods in Computer Vision 2003. [DOI: 10.1007/3-540-44935-3_40] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
26
|
Han MS, Kang PW, Choi DH, Lee YH, Choi SK, Yoon SR, Shin DJ, Kim JM, Jin HJ, Kwak KD, Kim W. Korean population genetic data for eleven STR loci. Forensic Sci Int 2001; 123:230-1. [PMID: 11728753 DOI: 10.1016/s0379-0738(01)00531-x] [Citation(s) in RCA: 6] [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: 11/16/2022]
Abstract
Allele frequency and forensic parameters for eleven STR loci were surveyed in a random sample from the Korean population.
Collapse
Affiliation(s)
- M S Han
- DNA Analysis Section, National Institute of Scientific Investigation, Seoul, Republic of Korea
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Lee UH, Pack HJ, Do JW, Bang JD, Cho HR, Ko BK, Nam CW, Choi DH, Yu HK, Jeong CS, Han IS, Park JW. Flounder (Paralichthys olivaceus) cDNA encoding a secreted immunoglobulin M heavy chain. Fish Shellfish Immunol 2001; 11:537-540. [PMID: 11556482 DOI: 10.1006/fsim.2001.0336] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Affiliation(s)
- U H Lee
- Department of Biological Science, University of Ulsan, Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Abstract
In the following report, thermal cycling coupled with random 10-mers as primers was used to construct randomly amplified shotgun libraries (RASLs). This approach allowed shotgun libraries to be constructed from nanogram quantities of input DNA. RASLs contained inserts from throughout a target genome in an unbiased fashion and did not appear to contain chimeric sequences. This protocol should be useful for shotgun sequencing the genomes of unculturable organisms and rapidly producing shotgun libraries from cosmids, fosmids, yeast artificial chromosomes (YACs), and bacterial artificial chromosomes (BACs).
Collapse
Affiliation(s)
- F Rohwer
- Scripps Institution of Oceanography, San Diego, CA, USA
| | | | | | | | | |
Collapse
|
29
|
Uh S, Kim DJ, Moon SH, Kim YH, Kim US, Choi DH, Park CS. Role of c-Jun N-terminal kinase in radiation-induced lung fibrosis. Chest 2001; 120:63S-64S. [PMID: 11451928 DOI: 10.1378/chest.120.1_suppl.s63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Affiliation(s)
- S Uh
- Department of Internal Medicine, Soon Chun Hyang University Hospital, Seoul, Korea
| | | | | | | | | | | | | |
Collapse
|
30
|
Chung N, Cho SY, Choi DH, Zhu JR, Lee K, Lee PY, Lee SH, Lee S, Wang JJ, Yin WH, Young MS, Koh KK, Son JW, Sangwatanaroj S, Panchavinnin P, Phankingthongkum R, Cai NS, Fan WF. STATT: a titrate-to-goal study of simvastatin in Asian patients with coronary heart disease. Simvastatin Treats Asians to Target. Clin Ther 2001; 23:858-70. [PMID: 11440286 DOI: 10.1016/s0149-2918(01)80074-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [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: 11/15/2022]
Abstract
BACKGROUND Most published studies on the use of lipid-lowering agents to treat hypercholesterolemia have focused on Western populations, with few data on Asian populations. OBJECTIVE The Simvastatin Treats Asians to Target (STATT) study used a titrate-to-goal protocol to evaluate the efficacy and tolerability of simvastatin 20 to 80 mg/d in the treatment of Asian patients with coronary heart disease. METHODS This was a multicenter, open-label, uncontrolled, 14-week study in patients with coronary heart disease and serum low-density lipoprotein cholesterol (LDL-C) levels of 115-180 mg/dL and triglyceride levels of < or = 400 mg/dL. The dose of simvastatin was titrated from 20 to 80 mg/d to achieve the National Cholesterol Education Program (NCEP) LDL-C target of < or = 100 mg/dL. The primary efficacy measure was the percentage of patients achieving the NCEP target. Among secondary measures were the percentage of patients achieving European Society of Cardiology/European Atherosclerosis Society/European Society of Hypertension target LDL-C levels of < or = 115 mg/dL and the percentage change from baseline in lipid parameters. Tolerability was assessed in terms of the overall incidence of adverse experiences and the incidences of the most commonly reported adverse experiences. RESULTS The intent-to-treat analysis included 133 Asian patients (93 men, 40 women; mean age, 59.5 years), of whom 125 completed 14 weeks of therapy. Their mean blood pressure was 130.2/79.4 mm Hg. Overall, 104 (78.2%) patients treated with simvastatin achieved LDL-C levels < or = 100 mg/dL at week 14, and 125 (94.0%) achieved this target at some point during the study. Similarly, 122 (91.7%) patients achieved an LDL-C level < or = 115 mg/dL at week 14, and 130 (97.7%) achieved this target at some point during the study. Treatment with simvastatin had favorable effects on the lipid profile, producing significant percentage changes from baseline in all parameters (P < 0.001). Simvastatin was well tolerated across the dose range. Overall, 40 patients (30.1%) had > or = 1 clinical adverse experience. Only 14 (10.5%) had adverse experiences that were possibly, probably, or definitely related to study drug; none of these experiences were considered serious. The most common adverse experiences (> or = 3% incidence) were abdominal pain (6%); chest pain (5%); dizziness (4%); and asthenia/fatigue, fibromyalgia, headache, insomnia, and upper respiratory tract infection (3% each). No new or unexpected adverse experiences were seen at the higher doses. CONCLUSIONS Simvastatin was effective and well tolerated at doses of 20, 40, and 80 mg/d in Asian patients with coronary heart disease. Titration enabled the majority to achieve target LDL-C levels of < or = 100 mg/dL.
Collapse
Affiliation(s)
- N Chung
- Cardiology Division, Yonsei University College of Medicine, Seoul, Korea.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Abstract
The frequency distributions of eight STR loci were surveyed in 510 unrelated individuals from the Korean population
Collapse
Affiliation(s)
- M S Han
- DNA Analysis Section, National Institute of Scientific Investigation, Seoul 158-097, South Korea
| | | | | | | | | | | |
Collapse
|
32
|
Abstract
The establishment of a long-term preservation system for mammalian oocytes is important for the development of both biological and medical sciences. A number of efforts have been made to develop this system. In human reproductive medicine, the development of an oocyte cryopreservation system can improve the efficacy of the current assisted reproductive technology (ART) for infertile patients with severe reproductive disorders. In this article, the technical development of cryopreservation programs for human oocytes and its biological background were reviewed. Clinical outcome after the use of this technology was further introduced.
Collapse
Affiliation(s)
- K Y Cha
- College of Medicine, Pochon CHA University and Infertility Medical Center of CHA General Hospital, South Korea
| | | | | | | | | | | | | |
Collapse
|
33
|
Cho HR, Choi DH, Ko BK, Nam CW, Park KM, Lee YJ, Lee SG, Lee JS, Lee KA, Lee EA, Ju SA, Kim BS. Cold preservation of rat cultured hepatocytes: the scoparone effect. Transplant Proc 2000; 32:2325-7. [PMID: 11120185 DOI: 10.1016/s0041-1345(00)01684-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- H R Cho
- Department of Surgery and Department of Internal Medicine, College of Medicine and Department of Life Sciences, Ulsan University, Ulsan, South Korea
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Choi DH, Park NK, Cho HS, Hahm TS, Chung IS. Effects of epidural injection on spinal block during combined spinal and epidural anesthesia for cesarean delivery. Reg Anesth Pain Med 2000; 25:591-5. [PMID: 11097665 DOI: 10.1053/rapm.2000.8934] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND AND OBJECTIVES Epidural injection has been known to enhance spinal anesthesia in combined spinal and epidural (CSE) anesthesia. Saline and local anesthetics have been reported to have a volume effect, elevating sensory level when supplementing a volume into the epidural space. We evaluated the effects of epidural injection when using the CSE technique for cesarean delivery. METHODS Sixty-six parturients were allocated randomly into group C (control, n = 21), S (saline, n = 21), or B (bupivacaine, n = 24): epidural injections of 10 mL saline and 0.25% bupivacaine were given in groups S and B, respectively, 10 minutes after they received 8 mg of 0.5% hyperbaric bupivacaine intrathecally, and no injection was given in group C. The sensory level at 10 minutes, the maximal level and the time to reach it, and degree of motor block and muscle relaxation were compared. We also investigated intraoperative side effects and postoperative findings in the postanesthesia care unit. RESULTS Epidural injection raised the sensory level significantly in groups S and B, but the maximal height of sensory block and degree of muscle relaxation did not differ among the groups. Fewer patients complained of intraoperative pain in group B than in the other groups (P <.001). CONCLUSIONS We could not achieve satisfactory surgical analgesia with 8 mg of hyperbaric bupivacaine injected into the subarachnoid space using the needle-through-needle technique in cesarean deliveries. An epidural saline injection elevated the sensory level, which did not improve the spinal block, whereas an epidural injection of 10 mL of 0.25% bupivacaine enhanced the spinal block and sustained the block postoperatively.
Collapse
Affiliation(s)
- D H Choi
- Department of Anesthesiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Ilwon-Dong, Kangnam-Ku, 135-710 Seoul, Korea.
| | | | | | | | | |
Collapse
|
35
|
Choi DH, Chung HM, Lim JM, Ko JJ, Yoon TK, Cha KY. Pregnancy and delivery of healthy infants developed from vitrified blastocysts in an IVF-ET program. Fertil Steril 2000; 74:838-9. [PMID: 11020537 DOI: 10.1016/s0015-0282(00)01492-8] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
36
|
Choi DH, Na BK, Seo MS, Song HR, Song CY. Purification and characterization of iron superoxide dismutase and copper-zinc superoxide dismutase from Acanthamoeba castellanii. J Parasitol 2000; 86:899-907. [PMID: 11128508 DOI: 10.1645/0022-3395(2000)086[0899:pacois]2.0.co;2] [Citation(s) in RCA: 7] [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: 11/10/2022] Open
Abstract
Two superoxide dismutases (SOD I and SOD II) were purified from Acanthamoeba castellanii and characterized for several biochemical properties. Analysis of the primary structure and inhibition studies revealed that SOD I is iron SOD (Fe-SOD), with a molecular mass of 50 kDa, and SOD II is copper-zinc SOD (Cu,Zn-SOD), with a molecular mass of 38 kDa. Both enzymes have a homodimeric structure consisting of 2 identical subunits, each with a molecular mass of 26 and 19 kDa for SOD I and SOD II, respectively. The isoelectric points of SOD I and SOD II were 6.4 and 3.5, respectively, and there were no isoenzyme forms detected. Both enzymes show a broad optimal pH of 7.0-11.0. Because no differences were observed in the apparent molecular weight of SOD I after addition of the reducing agent 2-mercaptoethanol, the subunits do not appear to be linked covalently by disulfide bonds. However, the subunits of SOD II were covalently linked by intra- and interdisulfide bonds. Western blot analyses showed that the 2 enzymes have different antigenicity. Both enzymes occur as cytoplasmic and detergent-extractable fractions. These enzymes may be potential virulence factors of A. castellanii by acting both as antioxidants and antiinflammatory agents. These enzymes may be attractive targets for chemotherapy and immunodiagnosis of acanthamoebiasis.
Collapse
Affiliation(s)
- D H Choi
- Department of Biology, College of Natural Science, Chung-Ang University, Seoul, Korea
| | | | | | | | | |
Collapse
|
37
|
Ahn YJ, Park SJ, Lee SG, Shin SC, Choi DH. Cordycepin: selective growth inhibitor derived from liquid culture of Cordyceps militaris against Clostridium spp. J Agric Food Chem 2000; 48:2744-2748. [PMID: 10898616 DOI: 10.1021/jf990862n] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The growth responses of nine human intestinal bacteria to liquid culture of Cordyceps militaris Link. Pt. (Ascomycotina: Clavicipitaceae) collected from a pupa of Bombyx mori L. (Lepidoptera: Bombycidae) were examined using spectrophotometric and impregnated paper disk methods and compared to those of tetracycline and chloramphenicol, as well as those of Coptis japonica root-derived berberine chloride. The biologically active constituent of the cultures was characterized as cordycepin (3'-deoxyadenosine) by spectroscopic analysis. This compound revealed potent growth-inhibiting activity toward Clostridium paraputrificum and Clostridium perfringens at 10 microgram/disk without adverse effects on the growth of Bifidobacterium bifidum, Bifidobacterium breve, Bifidobacterium longum, Bifidobacterium adolescentis, Lactobacillus acidophilus, and Lactobacillus casei, whereas tetracycline and chloramphenicol inhibited the growth of these lactic acid-producing bacteria, clostridia and Escherichia coli. However, C. militaris-derived materials revealed no growth stimulation on the bifidobacteria and lactobacilli. These results may be an indication of at least one of the pharmacological actions of C. militaris. As a naturally occurring antibacterial agent, cordycepin could be useful as a new preventive agent against various diseases caused by clostridia.
Collapse
Affiliation(s)
- Y J Ahn
- School of Agricultural Biotechnology, Seoul National University, Suwon 441-744, Republic of Korea.
| | | | | | | | | |
Collapse
|
38
|
Song YG, Kwon HM, Kim JM, Hong BK, Kim DS, Huh AJ, Chang KH, Kim HY, Kang TS, Lee BK, Choi DH, Jang YS, Kim HS. Serologic and histopathologic study of Chlamydia pneumoniae infection in atherosclerosis: a possible pathogenetic mechanism of atherosclerosis induced by Chlamydia pneumoniae. Yonsei Med J 2000; 41:319-27. [PMID: 10957885 DOI: 10.3349/ymj.2000.41.3.319] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [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: 11/27/2022] Open
Abstract
Chronic infection and inflammation have recently been implicated as important etiologic agents for atherosclerosis in general and, in particular, ischemic heart disease. Several agents have been suggested as possible candidates for the chronic inflammation including cytomegalovirus, Helicobacter pylori and Chlamydia pneumoniae. We hypothesized that a vascular infection with C. pneumoniae may induce a chronic inflammatory reaction in the host vascular tissue and activated inflammatory cells may express inflammatory mediators such as cyclooxygenase-2 (COX-2) and matrix metalloproteinases (MMPs). At first, we evaluated the relationship between C. pneumoniae infection and atherosclerosis indirectly by serologic study, and then, to confirm our hypothesis, we performed an immunohistochemical study of atherosclerotic plaques. The seropositive rate of anti-Chlamydia pneumoniae IgG was higher in the disease group (Group I, 59.8%, n = 254) than in the negative control group (Group III, 47.4%, n = 97) (p = 0.041), but the anti-Chlamydia pneumoniae IgA was not different in seropositivity between the two groups (Group I, 64.6%; Group III, 57.7%). The simultaneous seropositive rates of both IgG and IgA were 56.7% in Group I and 43.3% in Group III (p = 0.033). In subgroups without the conventional risk factors of atherosclerosis, these findings were more prominent. Furthermore, we performed immunohistochemical staining on the atherosclerotic aortic tissues obtained from patients that were seropositive to C. pneumoniae (n = 5), by using antibodies to C. pneumoniae, COX-2, and MMP-9. The immunoreactivity for COX-2 and MMP-9 increased in the atherosclerotic plaques itself, predominantly in the surrounding area of immunoreactive C. pneumoniae. These findings support our hypothesis and C. pneumoniae may participate in a pathogenetic mechanism for atherogenesis or progression of atherosclerosis. The present study may open a promising perspective concerning future therapeutic trials of chronic inflammation related atherogenesis under pathophysiological conditions.
Collapse
Affiliation(s)
- Y G Song
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
39
|
Abstract
BACKGROUND AND OBJECTIVES Visceral pain decreases in cesarean patients under spinal anesthesia when the dose of local anesthetic is increased. However, larger doses of local anesthetic are associated with higher sensory blocks. We hypothesized that the addition of fentanyl could reduce the dose of bupivacaine necessary to achieve adequate surgical anesthesia. METHODS Two double-blinded, sequential, prospective studies were performed on 120 patients. In the preliminary study, the patients received 8, 10, or 12 mg of 0.5% hyperbaric bupivacaine intrathecally. In the second, main study, they received each bupivacaine dose with 10 microg of fentanyl. Each group consisted of 20 patients, and the groups were identified as B8, B10, B12, BF8, BF10, and BF12. Sensory and motor block, intraoperative pain defined by visual analogue scale (VAS), muscle relaxation, and side effects were assessed. We also measured the sensory and motor recovery and the onset of pain in the postanesthesia care unit (PACU). RESULTS Maximal block level and incidence of high block (> or = T1) were higher in the 12-mg groups. There was intraoperative pain in 35% of the B8 patients and 20% of the B10 patients, but none in the B12 patients and all fentanyl groups. Incidences of other side effects were not different. The addition of fentanyl to bupivacaine significantly delayed the onset of postoperative pain and sensory recovery, but motor recovery time did not change with additional fentanyl. CONCLUSIONS The optimal dose of hyperbaric bupivacaine to produce surgical anesthesia was 12 mg, which was accompanied by high sensory block. With the addition of 10 microg of fentanyl, the dose of bupivacaine could be reduced to 8 mg in spinal anesthesia for cesarean delivery.
Collapse
Affiliation(s)
- D H Choi
- Department of Anesthesiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea.
| | | | | |
Collapse
|
40
|
Cha KY, Han SY, Chung HM, Choi DH, Lim JM, Lee WS, Ko JJ, Yoon TK. Pregnancies and deliveries after in vitro maturation culture followed by in vitro fertilization and embryo transfer without stimulation in women with polycystic ovary syndrome. Fertil Steril 2000; 73:978-83. [PMID: 10785224 DOI: 10.1016/s0015-0282(00)00422-2] [Citation(s) in RCA: 143] [Impact Index Per Article: 6.0] [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: 10/17/2022]
Abstract
OBJECTIVE To improve the efficacy of an IVF-ET program for unstimulated patients with polycystic ovary syndrome (PCOS) with the use of culture for oocyte maturation. DESIGN Prospective studies with the comparison of different ET procedures from March 1995 through February 1998. SETTING University-affiliated hospital. PATIENT(S) Ninety-four cycles in 64 consenting patients with PCOS. INTERVENTION(S) Immature oocytes were retrieved from unstimulated patients with PCOS and subsequently cultured and fertilized in vitro. Zygote intrafallopian transfer (ZIFT), uterine ET, or a combined approach of ZIFT + uterine ET was subsequently performed. MAIN OUTCOME MEASURE(S) Laboratory and clinical data. RESULT(S) Among 1, 280 immature oocytes (13.6 +/- 7.5 oocytes per patient) retrieved, 89% (1,139) were morphologically normal, and 62.2% (708/1,139) of the normal oocytes matured in vitro after culture for 48 hours. When intracytoplasmic sperm injection was performed, 68% (481/708) developed to the normal pronuclear stage, and 88.1% of the embryos cocultured with Vero cells (266/302) cleaved. Eighty-five ET cycles were conducted and pregnancy was established in 23 cycles (27.1%), which consisted of 8 after uterine ET and 15 after a combined approach. Seventeen patients delivered 20 normal infants. CONCLUSION(S) The IVF-ET method using no ovarian stimulation followed by in vitro maturation culture can be a feasible assisted reproductive technology for treatment of PCOS with various complications.
Collapse
Affiliation(s)
- K Y Cha
- College of Medicine, Pochon CHA University, Infertility Medical Center of CHA General Hospital, Seoul, South Korea
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Song HY, Hwang JH, Noh H, Shin SK, Choi DH, Shim WH, Lee HY, Cho SY, Han DS, Choi KH. The prevalence and associated risk factors of renal artery stenosis in patients undergoing cardiac catheterization. Yonsei Med J 2000; 41:219-25. [PMID: 10817023 DOI: 10.3349/ymj.2000.41.2.219] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [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: 11/27/2022] Open
Abstract
Renal artery stenosis may be a cause of hypertension and a potential contributor to progressive renal insufficiency. However, the prevalence of renal artery disease in a general population is poorly defined. The purposes of this study were to evaluate the prevalence of angiographically-determined renal artery narrowing in a patient population undergoing routine cardiac catheterization, and to identify the risk factors for renal artery stenosis. After left ventriculography, abdominal aortography was performed to screen for the presence of renal artery stenosis. A total of 427 patients (274 males, 153 females) were studied and the mean age was 59 years. Renal artery narrowing was identified in 10.5% of patients. Significant (> or = 50% diameter narrowing) renal artery stenosis was found in 24 patients (5.6%) and insignificant stenosis was found in 21 patients (4.9%). Significant unilateral stenosis was present in 4.2% of patients and bilateral stenosis was present in 1.4%. The stem of the renal artery was a more common site of stenosis in 62.2% of patients than in the ostium (37.8%), but the severity of stenosis was not significantly different according to the site of stenosis. By univariate and multivariate logistic regression analysis, the association of clinical variables with renal artery stenosis was assessed. Multivariable predictors included age, hypertension and peripheral vascular disease (p < 0.05). The variables such as sex, smoking history, hyperlipidemia, renal insufficiency, as well as the presence of obesity, severity of coronary heart disease and D.M., were not associated. In conclusion, the prevalence of angiographically-determined renal artery narrowing in a patient population undergoing cardiac catheterization is 10.5%. Old age, hypertension and evidence of peripheral vascular disease represent the predictors of renal artery stenosis.
Collapse
Affiliation(s)
- H Y Song
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Chung HM, Hong SW, Lim JM, Lee SH, Cha WT, Ko JJ, Han SY, Choi DH, Cha KY. In vitro blastocyst formation of human oocytes obtained from unstimulated and stimulated cycles after vitrification at various maturational stages. Fertil Steril 2000; 73:545-51. [PMID: 10689011 DOI: 10.1016/s0015-0282(99)00546-4] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [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: 11/21/2022]
Abstract
OBJECTIVE To evaluate the developmental competence and chromosomal normality of oocytes vitrified at various times after maturation culture. DESIGN In vitro model study. SETTING A university-affiliated hospital. PATIENT(S) Unstimulated women who underwent cesarean section or oophorectomy and infertile women who underwent a long protocol of GnRH stimulation. INTERVENTION(S) Retrieved oocytes were vitrified at 0 or 48 hours after culture in unstimulated cycles and at 0, 8-15, or 24-28 hours after culture in stimulated cycles. MAIN OUTCOME MEASURE(S) Postthaw morphologic normality, maturation, fertilization, cleavage, blastocyst formation, and chromosome number. RESULT(S) In the 53 oocytes that were obtained from unstimulated cycles, no statistically significant differences were found in rates of morphologic normality (range, 56%-63%) or fertilization (range, 31%-37%) according to the time of vitrification. In the 50 oocytes that were obtained from stimulated cycles, more of those that were vitrified at 24-28 hours were morphologically normal than those that were vitrified at 0 or 8-15 hours. Regardless of these differences, high cleavage rates (83%-100%) were obtained that did not differ significantly among the treatment groups. In both cycles, 20%-43% of cleaved oocytes developed to the blastocyst stage by 6 days after IVF. All the karyotyped blastocysts, three from unstimulated cycles and four from stimulated cycles, had a normal number of chromosomes. CONCLUSION(S) Vitrified and thawed oocytes from unstimulated or stimulated cycles developed to the blastocyst stage, regardless of when vitrification occurred; the number of chromosomes in the blastocysts was normal.
Collapse
Affiliation(s)
- H M Chung
- College of Medicine, Pochon CHA University, Infertility Medical Center of CHA General Hospital, Seoul, South Korea.
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Abstract
BACKGROUND Epidural anesthesia (EA) is popular for cesarean section, but has some drawbacks such as incomplete block, inadequate muscle relaxation and delayed onset. Combined spinal epidural anesthesia (CSEA) has gained increasing interest as it combines the reliability of a spinal block and the flexibility of an epidural block. We investigated the efficacy of CSEA that combines the main spinal and the supporting epidural anesthesia, comparing with pH-adjusted EA, for cesarean section. METHODS Sixty-four pregnant women at full term were divided into two groups. Patients in the CSEA group (n=32) were given 1.5-1.6 ml of 0.5% hyperbaric bupivacaine intrathecally, followed by 10 ml of 0.25% plain bupivacaine through the epidural catheter 10 min later. Patients in the EA group (n=32) received 20-25 ml of 2% lidocaine which was already mixed with 0.1 ml of 0.1% epinephrine, 100 g of fentanyl and 1.5 ml of 8.4% sodium bicarbonate. The quality and side effects of surgical anesthesia, neonatal state, and postoperative course were compared between the two groups. RESULTS In the EA group, 22% (7 cases) complained of intraoperative pain but none in the CSEA group (P=0.011). Muscle relaxation and motor block were much better in the CSEA group (P<0.001 and P=0.011 each). Significantly more women in the EA group had shivering (P=0.001). They also had more nausea and vomiting but the differences were not significant. Not only the time to T4 block (9.7 vs. 18.3 min, mean, P<0.001) but also the stay in the postanesthesia care unit, recovery of sensory and motor block and start of postoperative pain were all significantly shorter in the CSEA group. No one in either group had postdural puncture headache (PDPH). CONCLUSION We can conclude that, when combining the main spinal and the supporting epidural anesthesia, CSEA has greater efficacy and fewer side effects than the pH-adjusted EA in cesarean sections.
Collapse
Affiliation(s)
- D H Choi
- Department of Anesthesiology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | | | | |
Collapse
|
44
|
Choi SH, Kim SW, Choi DH, Min BH, Chun BG. Polyamine-depletion induces p27Kip1 and enhances dexamethasone-induced G1 arrest and apoptosis in human T lymphoblastic leukemia cells. Leuk Res 2000; 24:119-27. [PMID: 10654447 DOI: 10.1016/s0145-2126(99)00161-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [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: 01/10/2023]
Abstract
Glucocorticoid-induced apoptosis is preceded by G1 arrest and supposed to be up-regulated by polyamine-depletion, which also induces G1, arrest. In CEM leukemia cells, dexamethasone showed an antileukemic effect by inducing G1 arrest and apoptosis. DFMO, which depleted cellular polyamines by inhibiting ornithine decarboxylase, induced G1 arrest but without apoptosis, though it enhanced dexamethasone-induced G1 arrest and apoptosis. The G1 arrest was associated with hypophosphorylation of pRb. Dexamethasone inhibited the increase of mutated p53 expression but had little effect on p2Wafl/Cip1 expression. The p27Kip1, level was increased by dexamethasone or and DFMO in line with the kinetics of G1 arrest. Therefore, the up-regulation of dexamethasone-induced apoptosis by polyamine-depletion may be associated with additive down-regulation of G1 progression via the p27Kip1-pRb pathtway.
Collapse
Affiliation(s)
- S H Choi
- Department of Pharmacology, Korea University College of Medicine, Seoul, South Korea
| | | | | | | | | |
Collapse
|
45
|
Kwon K, Chung N, Ha JW, Rim SJ, Kim HJ, Chang KJ, Lee BK, Pyun WB, Kim IJ, Kim DK, Choi DH, Jang YS, Lee JD, Cho SY, Kim SS. Assessments of myocardial perfusion in human using stress intravenous PESDA myocardial contrast echocardiography and Pulse Inversion Harmonic Imaging: A Comparison study with Tc-99m sestamibi SPECT. Korean Circ J 2000. [DOI: 10.4070/kcj.2000.30.7.793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- KiHwan Kwon
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - N Chung
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - JW Ha
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - SJ Rim
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - HJ Kim
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - KJ Chang
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - BK Lee
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - WB Pyun
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - IJ Kim
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - DK Kim
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - DH Choi
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - YS Jang
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - JD Lee
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - S Y Cho
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| | - SS Kim
- Department of Anesthesiology, Seoul University Hospital, Seoul, Korea
| |
Collapse
|
46
|
Chae SH, Jeong IH, Choi DH, Oh JW, Ahn YJ. Growth-inhibiting effects of Coptis japonica root-derived isoquinoline alkaloids on human intestinal bacteria. J Agric Food Chem 1999; 47:934-8. [PMID: 10552394 DOI: 10.1021/jf980991o] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The growth-inhibiting activity of Coptis japonica (Makino) root-derived materials toward eight human intestinal bacteria was examined using an impregnated paper disk method and compared to that of four commercially available isoquinoline alkaloids [berberine sulfate (BS), berberine iodide (BI), palmatine chloride (PC), and palmatine sulfate(PS)], as well as that of Thea sinensis leaf-derived epigallocatechin gallate (EGCG). The biologically active constituents of the Coptis extract were characterized as the isoquinoline alkaloids berberine chloride (BC), palmatine iodide (PI), and coptisine chloride (CC) by spectral analysis. The growth responses varied with both chemical and bacterial strain used. In a test using 500 microg/disk, BC and PI produced a clear inhibitory effect against Bifidobacterium longum, Bifidobacterium bifidum, Clostridium perfringens, and Clostridium paraputrificum, whereas weak or no inhibition was observed in Bifidobacterium adolescentis, Lactobacillus acidophilus, Lactobacillus casei, and Escherichia coli. At 1000 microg/ disk, CC revealed weak or no growth inhibition toward all test bacteria, whereas EGCG exhibited weak growth inhibition against only C. perfringens and C. paraputrificum. Among various isoquinoline alkaloids, BC exhibited more potent inhibitory activity toward C. perfringens than BI and BS, whereas the inhibitory effect was more pronounced in PI compared to PC and PS. The Coptis root-derived materials did not promote growth of B. longum and C. perfringens.
Collapse
Affiliation(s)
- S H Chae
- Division of Applied Biology and Chemistry and Research Center for New-Biomaterials in Agriculture, College of Agriculture and Life Sciences, Seoul National University, Suwon 441-744, Republic of Korea
| | | | | | | | | |
Collapse
|
47
|
Abstract
The extracts from the starfish Asterina pectinifera obtained using various organic solvents and distilled water were tested for their antimicrobial activities against fungi and yeasts. The methanol and water extracts were found to be the most active and Aspergillus spp. and Cryptococcus neoformans proved to be sensitive species. The extracts are polar, stable to a wide range of pH and a high temperature, and possess a very distinctive UV spectrum. The colour reactions for functional groups of antimicrobial substances indicate the presence of some distinctive chemical properties common to steroidal oligoglycosides which results suggest that the antimicrobial activity is due to structures common to steroidal oligoglycosides.
Collapse
Affiliation(s)
- D H Choi
- Department of Applied Biology, Dongguk University, Seoul, South Korea
| | | | | |
Collapse
|
48
|
Abstract
Transforming growth factor-beta 1 (TGF-beta 1) is a member of a gene superfamily that regulates proliferation, differentiation and other functions in many cell types. To gain insight into the role of TGF-beta 1 in wound repair, we have analysed the ability of an antisense TGF-beta 1 oligodeoxynucleotides (ODN) to specifically inhibit wound-induced expression of TGF-beta 1 mRNA in the mouse skin. Although injury induced the expression of TGF-beta 1 mRNA at the wound sites, expression of TGF-beta 2-or TGF-beta 3-mRNA was not detected. In comparison to the 24 h following injury, higher levels of TGF-beta 1 mRNA expression were observed in the wound sites after 72 h. Northern blotting and in situ hybridisation analysis showed that wound sites treated with antisense TGF-beta 1 ODN exhibited no detectable levels of TGF-beta 1 mRNA after injury, whereas the sites treated with sense TGF-beta 1 ODN possessed significant amounts of its mRNA. Our results demonstrated that antisense TGF-beta 1 ODN inhibited the wound-induced expression of TGF-beta 1 mRNA in vivo.
Collapse
Affiliation(s)
- H M Kim
- Department of Oriental Pharmacy, College of Pharmacy, Wonkwang University, Iksan, South Korea
| | | | | |
Collapse
|
49
|
Hong JS, Kim DS, Kim SH, Choi DH, Lee JH, Lee HY. The enhancement of growth and differentiation of rat adrenal nerve cells by the addition of conditioned medium from human fibroblast cultures. Cytotechnology 1998; 26:125-30. [PMID: 22358550 PMCID: PMC3466676 DOI: 10.1023/a:1007942619463] [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] [Indexed: 11/12/2022] Open
Abstract
The growth of rat adrenal nerve cells was remarkably enhanced by supplementing the cultured medium from the human fibroblast cell line, Hs 68. Maximum specific growth rate and length of the neurites were observed as 0.076 (1/hr) and 0.026 mm, respectively in 20% supplement of five day old medium. In adding more than 20% of the cultured medium both cell and neurite growth was severely decreased. It was interesting that the cultured medium from Hs 68 cells could play a role in the extension of the neurites rather than in the growth of neurite cells. It was also found that molecules lower than 50,000 daltons in the conditioned medium could improve the growth of neurite bearing cells and the extension of the neurites than larger molecules. The efficacy of the proteins (<50,000 MW) was similar to that of human nerve growth factor and much better than that of basic fibroblast growth factor which was mainly secreted from human fibroblast cells.
Collapse
Affiliation(s)
- J S Hong
- Division of Food and Biotechnology, Kangwon National University, Chunchon, 200-701, S. Korea
| | | | | | | | | | | |
Collapse
|
50
|
Abstract
The feasibility of using neural networks for camera localization and mobile robot control is investigated here. This approach has the advantages of eliminating the laborious and error-prone process of imaging system modeling and calibration procedures. Basically, two different approaches of using neural networks are introduced of which one is a hybrid approach combining neural networks and the pinhole-based analytic solution while the other is purely neural network based. These techniques have been tested and compared through both simulation and real-time experiments and are shown to yield more precise localization than analytic approaches. Furthermore, this neural localization method is also shown to be directly applicable to the navigation control of an experimental mobile robot along the hallway purely guided by a dark wall strip. It also facilitates multi-sensor fusion through the use of multiple sensors of different types for control due to the network's capability of learning without models.
Collapse
Affiliation(s)
- D H Choi
- School of Electronic and Electrical Engineering, Kyungpook National University, Taegu, Korea
| | | |
Collapse
|