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Lee YX, Tzeng CR, Hu YM, Chen CH, Chen CW, Liao CC, Chen LY, Weng YC, Wang HC, Huang RL, Lai HC. P–522 Cervical secretion methylation profile is associated with the success of frozen-thawed embryo transfer - a proof-of-concept study. Hum Reprod 2021. [DOI: 10.1093/humrep/deab130.521] [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: 11/13/2022] Open
Abstract
Abstract
Study question
Is cervical secretion gene methylation profile different between receptive and non-receptive endometrium and associated with implantation outcome in frozen-embryo transfer (FET) cycle?
Summary answer
The combination of candidate genes methylation profiles obtained from cervical secretion showed significant associations with pregnancy outcomes.
What is known already
Implantation failure remains a black box in reproductive medicine, and the exact mechanism of how endometrial receptivity is regulated is still unknown. Epigenetic modifications play a role in the gene expression pattern and may alter the endometrial receptivity in the human endometrium. Cervical secretion containing various implantation-related cytokines, and the gene methylation change can be used as a non-invasive molecular source that reflects the endometrium condition.
Study design, size, duration
In this retrospective case-control study, sixty-two women who entered the FET cycle (30 pregnant and 32 non-pregnant women) were enrolled.
Participants/materials, setting, methods
Cervical secretion was collected before embryo transfer from women enrolled in multicenter university-affiliated reproductive units. The DNA methylation status of six candidate genes was measured using quantitative methylation-specific PCR (qMSP). The correlation between methylation change and the pregnancy outcome was analyzed.
Main results and the role of chance
The candidate genes were selected from that associated with implantation with literature review and the original genome-wide DNA methylation data from NCBI GEO DataSets (GSE90060) which processed using bioinformatics analysis. Six candidate genes whose CpG-level methylation analysis with β-value statistically higher in receptive endometrium than in a pre-receptive endometrium were selected. All six candidate genes showed different degrees of correlation with the pregnancy outcomes. Among them, PRKAG2 methylation changes showed the highest correlation with the pregnancy outcome. A logistic regression model was used to evaluate the performance of a single gene or a combination of genes for implantation prediction. The results showed a statistically significant association between the methylation status of a combination of genes (PRKAG2, KRS1, HAND2) and the pregnancy outcome (p = 0.008), resulting in an optimal AUC of 0.7 (95% CI: 0.57 - 0.81) for implantation prediction.
Limitations, reasons for caution
The results obtained from a relatively small cohort size. A larger study and further comprehensive methylome investigations are warranted.
Wider implications of the findings: This study is the first proof-of-concept study that cervical secretion methylation profile is associated with implantation outcome in a FET cycle, and showed potential as a non-invasive method for implantation prediction.
Trial registration number
non applicable
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Affiliation(s)
- Y X Lee
- Taipei Medical University, Graduate Institute of Clinical Medicine, Taipei, Taiwan R.O.C
- Shuang Ho Hospital- Taipei Medical University, Translational epigenetics center, New Taipei City, Taiwan R.O.C
- Taipei Fertility Center, Taipei Fertility Center, Taipei, Taiwan R.O.C
| | - C R Tzeng
- Taipei Fertility Center, Taipei Fertility Center, Taipei, Taiwan R.O.C
- Taipei Medical University, Department of Obstetrics and Gynecology- School of Medicine- College of Medicine, Taipei, Taiwan R.O.C
| | - Y M Hu
- Taipei Fertility Center, Taipei Fertility Center, Taipei, Taiwan R.O.C
| | - C H Chen
- Taipei Medical University, Department of Obstetrics and Gynecology- School of Medicine- College of Medicine, Taipei, Taiwan R.O.C
- Taipei Medical University Hospital, Division of Reproductive Medicine- Department of Obstetrics and Gynecology-, Taipei, Taiwan R.O.C
| | - C W Chen
- Shuang Ho Hospital- Taipei Medical University, Department of Obstetrics and Gynecology, New Taipei City, Taiwan R.O.C
| | - C C Liao
- Shuang Ho Hospital- Taipei Medical University, Department of Obstetrics and Gynecology, New Taipei City, Taiwan R.O.C
| | - L Y Chen
- Shuang Ho Hospital- Taipei Medical University, Translational epigenetics center, New Taipei City, Taiwan R.O.C
- Shuang Ho Hospital- Taipei Medical University, Department of Obstetrics and Gynecology, New Taipei City, Taiwan R.O.C
| | - Y C Weng
- Shuang Ho Hospital- Taipei Medical University, Translational epigenetics center, New Taipei City, Taiwan R.O.C
| | - H C Wang
- Taipei Medical University, Department of Obstetrics and Gynecology- School of Medicine- College of Medicine, Taipei, Taiwan R.O.C
| | - R L Huang
- Shuang Ho Hospital- Taipei Medical University, Translational epigenetics center, New Taipei City, Taiwan R.O.C
- Taipei Medical University, Department of Obstetrics and Gynecology- School of Medicine- College of Medicine, Taipei, Taiwan R.O.C
- Shuang Ho Hospital- Taipei Medical University, Department of Obstetrics and Gynecology, New Taipei City, Taiwan R.O.C
| | - H C Lai
- Shuang Ho Hospital- Taipei Medical University, Translational epigenetics center, New Taipei City, Taiwan R.O.C
- Taipei Medical University, Department of Obstetrics and Gynecology- School of Medicine- College of Medicine, Taipei, Taiwan R.O.C
- Shuang Ho Hospital- Taipei Medical University, Department of Obstetrics and Gynecology, New Taipei City, Taiwan R.O.C
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Lee PH, Peng JK, Chang HC, Huang PSB, Wu CY, Hsu SH, Weng YC, Tu CY, Lee JH, Chiu GL, Tsai JS. Strategies maintaining hospice and palliative care quality during COVID-19 pandemic in Taiwan. BMJ Support Palliat Care 2021; 12:bmjspcare-2021-003276. [PMID: 34315720 DOI: 10.1136/bmjspcare-2021-003276] [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] [Received: 07/06/2021] [Accepted: 07/11/2021] [Indexed: 11/04/2022]
Affiliation(s)
- Ping-Hsueh Lee
- Department of Geriatric Medicine, Kuang Tien General Hospital, Taichung, Taiwan
| | - Jen-Kuei Peng
- Department of Family Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Department of Family Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Hsien-Cheng Chang
- Department of Family Medicine, Lo-Hsu Medical Foundation Lotung Poh-Ai Hospital, Yilan, Taiwan
| | - Paul Sin-Bao Huang
- Department of Family Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Chien-Yi Wu
- Department of Family Medicine, Kaohsiung Medical University Chung Ho Memorial Hospital, Kaohsiung, Taiwan
| | - Su-Hsuan Hsu
- Department of Family Medicine, National Taiwan University Hospital Jinshan Branch, New Taipei, Taiwan
| | | | - Chun-Yi Tu
- Department of Family Medicine, Taipei Veterans General Hospital Taoyuan Branch, Taoyuan, Taiwan
| | - Jun-Hua Lee
- Department of Social Work, Fu Jen Catholic University, Taipei, Taiwan
| | - Ge-Lin Chiu
- Department of Nursing, National Cheng-Kung University Hospital, College of Medicine National Cheng Kung University, Tainan, Taiwan
| | - Jaw-Shiun Tsai
- Department of Family Medicine, National Taiwan University Hospital, Taipei, Taiwan
- Department of Family Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
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Hsu KH, Huang JW, Tseng JS, Chen KW, Weng YC, Yu SL, Yang TY, Huang YH, Chen JJW, Chen KC, Chang GC. Primary Tumor Radiotherapy During EGFR-TKI Disease Control Improves Survival of Treatment Naïve Advanced EGFR-Mutant Lung Adenocarcinoma Patients. Onco Targets Ther 2021; 14:2139-2148. [PMID: 33790577 PMCID: PMC8006910 DOI: 10.2147/ott.s300267] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 03/10/2021] [Indexed: 12/25/2022] Open
Abstract
Background Whether radiotherapy only for primary lung tumor (RTPLT) after epidermal growth factor receptor (EGFR)-tyrosine kinase inhibitor (TKI) therapy improves survival of treatment naïve advanced EGFR-mutant lung adenocarcinoma (LAD) patients with/without polymetastasis. Materials and Methods This was a retrospective, single-center, observational study. Patients with stage IIIB-IV EGFR-mutant LAD with disease control by EGFR-TKI therapy were divided into curative RTPLT, and control, without radiotherapy (WRTPLT) groups. Results A total of 138 patients were enrolled; 46 in the RTPLT group and 92 in the WRTPLT group. Amongst them, 37% had oligometastasis, and 26.1% brain metastasis. The RTPLT group had both significantly longer progression-free survival (PFS) (27.5 months [95% CI 18.1–36.9] vs 10.9 months [95% CI 6.3–15.5], P<0.001) and overall survivor (OS) (NR [95% CI NR-NR] vs 38.0 months [95% CI 31.2–44.8], P<0.001), respectively, when compared to the WRTPLT group. In multivariate analysis, the adjusted HR of radiotherapy on PFS was 0.30 (0.19–0.47) and on OS, 0.11 (0.04–0.30). Patients with oligometastasis had significantly longer PFS than those with polymetastasis with an HR of 0.35 (0.14–0.85), P=0.02. Patients with either oligometastasis or polymetastasis had significant longer PFS when undergoing radiotherapy than those without (both P<0.05). An EGFR-TKI to radiotherapy interval <24 weeks seemed more beneficial (P=0.097). Radiation pneumonitis comprised 32 (69.6%), 12 (26.1%), and two (4.3%) cases of common terminology criteria grade I, II, and III, respectively. Conclusion Curative RTPLT can prolong survival in patients with LAD following EGFR-TKI disease control, both involving oligometastasis and polymetastasis. RTPLT within 24 weeks after EGFR-TKI initiation appeared to be more beneficial with tolerable radiation pneumonitis.
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Affiliation(s)
- Kuo-Hsuan Hsu
- Division of Critical Care and Respiratory Therapy, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Institute of Biomedical Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Jing-Wen Huang
- Institute of Biomedical Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan.,Department of Radiation Oncology, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Jeng-Sen Tseng
- Institute of Biomedical Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan.,Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Kuan-Wen Chen
- Department of Radiation Oncology, Taichung Tzu-Chi Hospital, Buddhist Tzu-Chi Medical Foundation, Taichung, Taiwan
| | - Yih-Chyang Weng
- Radiation Oncology, Nantou Hospital of Ministry of Health and Welfare, Nantou City, Taiwan
| | - Sung-Liang Yu
- Department of Clinical Laboratory Sciences and Medical Biotechnology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Department of Laboratory Medicine, National Taiwan University Hospital, Taipei, Taiwan.,Center of Genomic Medicine, National Taiwan University College of Medicine, Taipei, Taiwan.,Department of Pathology and Graduate Institute of Pathology, College of Medicine, National Taiwan University, Taipei, Taiwan.,Center for Optoelectronic Biomedicine, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Tsung-Ying Yang
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Yen-Hsiang Huang
- Institute of Biomedical Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan.,Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Jeremy J W Chen
- Institute of Biomedical Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan
| | - Kun-Chieh Chen
- Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Division of Pulmonary Medicine, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan.,Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Gee-Chen Chang
- Institute of Biomedical Sciences, College of Life Sciences, National Chung Hsing University, Taichung, Taiwan.,Division of Chest Medicine, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan.,Faculty of Medicine, School of Medicine, National Yang-Ming University, Taipei, Taiwan.,Division of Pulmonary Medicine, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan.,Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan.,School of Medicine, Chung Shan Medical University, Taichung, Taiwan
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Weng YC, Bruynzeel F. [A man with erythematosquamous plaques]. Ned Tijdschr Geneeskd 2021; 165:D5795. [PMID: 33651510] [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: 06/12/2023]
Abstract
A 43-year-old male visited our dermatology department with a skin eruption diagnosed as psoriasis. It began 1 month after starting peg-interferon-α-1a therapy for multiple sclerosis. Peg-interferon is known to be able to induce psoriasis, as well as other medication, while the pathophysiology remains unclear.
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Affiliation(s)
- Y C Weng
- Groene Hart Ziekenhuis, afd. Dermatologie, Gouda
- Contact: Y.C. Weng
| | - F Bruynzeel
- Groene Hart Ziekenhuis, afd. Dermatologie, Gouda
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Weng YC, Gu DS, Zeng DQ, Zhang L. [Analysis of the compliance and effectiveness of the allergen specific immunotherapy in patients with allergic rhinitis]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 30:542-545. [PMID: 29871065 DOI: 10.13201/j.issn.1001-1781.2016.07.009] [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] [Key Words] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Indexed: 11/12/2022]
Abstract
Objective:To investigate the effectiveness and compliance of the 2 year specific immunotherapy in patients with allergic rhinitis. Method:Two hundred and sixty-two patients of allergic rhinitis were treated with SLIT for 2 years. The symptom questionnaire about effectiveness and compliance were obtained 2 years after SLIT. The patient satisfaction was also investigated. Result:Sixty patients had complete compliance and 202 patients had poor compliance. Of the 142 children, 40 (28%) cases had complete compliance, and of the 118 adult patients, 20 cases (17%) had complete compliance. There was obvious difference between the two (P<0.05). Comparing of before and after treatment, total medication score, total nasal symptom score and every symptom score decreased obviously (P<0.05). Two years after treatment, the total effective rate was 63%,there was significant difference between the children group and the adult group (P<0.05). Conclusion:There are a lot of factors affecting the treatment compliance of sublingual immunotherapy, such as patients, family, health care workers and social support, etc. In the course of treatment, a series of strategies can be adopted to improve the treatment compliance. SLIT is an effective method for the treatment of allergic rhinitis, and the treatment effect of children is better.
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Affiliation(s)
- Y C Weng
- Department of Otolaryngology Head and Neck Surgery, Chinese People's Armed Police Force, Zhejiang Corps Hospital, Jiaxing, 314000, China
| | - D S Gu
- Department of Otolaryngology Head and Neck Surgery, Chinese People's Armed Police Force, Zhejiang Corps Hospital, Jiaxing, 314000, China
| | - D Q Zeng
- Department of Otolaryngology Head and Neck Surgery, Chinese People's Armed Police Force, Zhejiang Corps Hospital, Jiaxing, 314000, China
| | - L Zhang
- Department of Otolaryngology Head and Neck Surgery, Chinese People's Armed Police Force, Zhejiang Corps Hospital, Jiaxing, 314000, China
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Weng YC, Zeng DQ, Gu DS, Chen YW. [One case in which papillary thyroid carcinoma and papillary carcinoma occur on the same side]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:499-500. [PMID: 29871051 DOI: 10.13201/j.issn.1001-1781.2016.06.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Indexed: 11/12/2022]
Abstract
thyroid carcinoma is a common tumor in the endocrine system. There are four common types of thyroid carcinoma: papillary carcinoma; follicular cancer; medullary carcinoma; undifferentiated carcinoma. Thyroid papillary carcinoma is derived from follicular epithelial cells, which is different from that of medullary thyroid carcinoma. If both occur in the same side of the thyroid gland, this is very rare. In this paper we report a case in which papillary thyroid carcinoma and papillary carcinoma occurr on the same side.
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Chiou TJ, Liu CY, Tzeng WF, Su YC, Weng YC, Hung CJ, Tang Y, Chen YJ. The use of transdermal fentanyl in cancer pain--a compliance study of outpatients in Taiwan. Am J Hosp Palliat Care 2009; 27:31-7. [PMID: 19801533 DOI: 10.1177/1049909109346427] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The aim of this study is to investigate cancer patients' response and side effects associated with transdermal therapeutic fentanyl (TTS-F), whose pain was hardly controlled by nonweak/weak opioids in Taiwan. From 2005 to 2006, 822 outpatients received TTS-F to collect pain assessment forms and diaries for 4 weeks. Most (78.7%) patients were initially prescribed 25 microg/h TTS-F. Doses were adjusted weekly at clinicians' discretion, according to pain assessment and side effects. Patients receiving 50 microg/h, 75 microg/h, and > 75 microg/h TTS-F had increased from 17.5% to 32.1%, 1.8% to 3.4%, and 1.9% to 2.2%, respectively, by week 2; further small increases were found in weeks 3 and 4. Pain palliation improved from 60.6% during week 1 to 78.6% at week 4. The common adverse effects were nausea/vomiting. Patient's compliance was >90%. This study found that the TTS-F is effective and well tolerated.
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Affiliation(s)
- Tzeon-Jye Chiou
- Department of Medicine, Division of Transfusion Medicine, Taipei Veterans General Hospital and National Yang-Ming University School of Medicine, Taipei, Taiwan.
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Lalancette-Hébert M, Phaneuf D, Soucy G, Weng YC, Kriz J. Live imaging of Toll-like receptor 2 response in cerebral ischaemia reveals a role of olfactory bulb microglia as modulators of inflammation. ACTA ACUST UNITED AC 2009; 132:940-54. [PMID: 19153151 DOI: 10.1093/brain/awn345] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.1] [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: 12/19/2022]
Abstract
Activation of microglial cells in response to ischaemic injury, inflammatory and/or immune stimuli is associated with the marked induction of Toll-like receptor 2 (TLR2). At present, little is known about the spatial and temporal sequence of events, micro-regional specificities and the potential long term role of the TLR2 response to brain injuries. To investigate microglial activation/TLR2 response in real time, we generated a transgenic mouse model bearing the dual reporter system luciferase/green fluorescent protein under transcriptional control of a murine TLR2 promoter. In this model, transcriptional activation of TLR2 was visualized in the brains of live animals using biophotonic/bioluminescence molecular imaging and a high resolution/sensitivity charged coupled device camera. It was found that TLR2 induction/microglial activation has a marked chronic component after ischaemic injury and may last several months after the initial attack. The pro-inflammatory response was not restricted to the site of ischaemic injury but was also evident in the olfactory bulb. A significant TLR2 response was first seen in the olfactory bulb 6 h after stroke and several hours before the increase in photon emission over the site of infarction. This sequence of events was further confirmed by immunohistochemistry. A similar early TLR2 response from olfactory bulb microglia was observed in the brain's immune response to pathogens. We therefore propose that, owing to their unique situation, receiving and translating numerous inputs from the brain as well as from the environment, olfactory bulb microglia may serve as sensors and/or modulators of brain inflammation.
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Affiliation(s)
- M Lalancette-Hébert
- Department of Anatomy and Physiology, Laval University, Centre de Recherche du Centre Hospitalier de l'Université Laval, Québec, Canada G1V 4G2
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Hsieh SL, Lai F, Cheng PH, Chen JL, Lee HH, Tsai WN, Weng YC, Hsieh SH, Hsu KP, Ko LF, Yang TH, Chen CH. An integrated healthcare enterprise information portal and healthcare information system framework. Conf Proc IEEE Eng Med Biol Soc 2006; 2006:4731-4734. [PMID: 17946647 DOI: 10.1109/iembs.2006.260715] [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] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The paper presents an integrated, distributed Healthcare Enterprise Information Portal (HEIP) and Hospital Information Systems (HIS) framework over wireless/wired infrastructure at National Taiwan University Hospital (NTUH). A single sign-on solution for the hospital customer relationship management (CRM) in HEIP has been established. The outcomes of the newly developed Outpatient Information Systems (OIS) in HIS are discussed. The future HEIP blueprints with CRM oriented features: e-Learning, Remote Consultation and Diagnosis (RCD), as well as on-Line Vaccination Services are addressed. Finally, the integrated HEIP and HIS architectures based on the middleware technologies are proposed along with the feasible approaches. The preliminary performance of multi-media, time-based data exchanges over the wireless HEIP side is collected to evaluate the efficiency of the architecture.
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Affiliation(s)
- S L Hsieh
- Inf. Syst. Office, Nat. Taiwan Univ. Hosp., Taipei, Taiwan
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Post S, Weng YC, Cimprich K, Chen LB, Xu Y, Lee EY. Phosphorylation of serines 635 and 645 of human Rad17 is cell cycle regulated and is required for G(1)/S checkpoint activation in response to DNA damage. Proc Natl Acad Sci U S A 2001; 98:13102-7. [PMID: 11687627 PMCID: PMC60831 DOI: 10.1073/pnas.231364598] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
ATR [ataxia-telangiectasia-mutated (ATM)- and Rad3-related] is a protein kinase required for both DNA damage-induced cell cycle checkpoint responses and the DNA replication checkpoint that prevents mitosis before the completion of DNA synthesis. Although ATM and ATR kinases share many substrates, the different phenotypes of ATM- and ATR-deficient mice indicate that these kinases are not functionally redundant. Here we demonstrate that ATR but not ATM phosphorylates the human Rad17 (hRad17) checkpoint protein on Ser(635) and Ser(645) in vitro. In undamaged synchronized human cells, these two sites were phosphorylated in late G(1), S, and G(2)/M, but not in early-mid G(1). Treatment of cells with genotoxic stress induced phosphorylation of hRad17 in cells in early-mid G(1). Expression of kinase-inactive ATR resulted in reduced phosphorylation of these residues, but these same serine residues were phosphorylated in ionizing radiation (IR)-treated ATM-deficient human cell lines. IR-induced phosphorylation of hRad17 was also observed in ATM-deficient tissues, but induction of Ser(645) was not optimal. Expression of a hRad17 mutant, with both serine residues changed to alanine, abolished IR-induced activation of the G(1)/S checkpoint in MCF-7 cells. These results suggest ATR and hRad17 are essential components of a DNA damage response pathway in mammalian cells.
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Affiliation(s)
- S Post
- Department of Molecular Medicine/Institute of Biotechnology, University of Texas Health Science Center, 15355 Lambda Drive, San Antonio, TX 78245, USA
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Zhao S, Weng YC, Yuan SS, Lin YT, Hsu HC, Lin SC, Gerbino E, Song MH, Zdzienicka MZ, Gatti RA, Shay JW, Ziv Y, Shiloh Y, Lee EY. Functional link between ataxia-telangiectasia and Nijmegen breakage syndrome gene products. Nature 2000; 405:473-7. [PMID: 10839544 DOI: 10.1038/35013083] [Citation(s) in RCA: 392] [Impact Index Per Article: 16.3] [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: 11/09/2022]
Abstract
Ataxia-telangiectasia (A-T) and Nijmegen breakage syndrome (NBS) are recessive genetic disorders with susceptibility to cancer and similar cellular phenotypes. The protein product of the gene responsible for A-T, designated ATM, is a member of a family of kinases characterized by a carboxy-terminal phosphatidylinositol 3-kinase-like domain. The NBS1 protein is specifically mutated in patients with Nijmegen breakage syndrome and forms a complex with the DNA repair proteins Rad50 and Mrel1. Here we show that phosphorylation of NBS1, induced by ionizing radiation, requires catalytically active ATM. Complexes containing ATM and NBS1 exist in vivo in both untreated cells and cells treated with ionizing radiation. We have identified two residues of NBS1, Ser 278 and Ser 343 that are phosphorylated in vitro by ATM and whose modification in vivo is essential for the cellular response to DNA damage. This response includes S-phase checkpoint activation, formation of the NBS1/Mrel1/Rad50 nuclear foci and rescue of hypersensitivity to ionizing radiation. Together, these results demonstrate a biochemical link between cell-cycle checkpoints activated by DNA damage and DNA repair in two genetic diseases with overlapping phenotypes.
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Affiliation(s)
- S Zhao
- Department of Molecular Medicine/Institute of Biotechnology, The University of Texas Health Science Center at San Antonio, 78245-3207, USA
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Chen H, Weng YC, Schatteman GC, Sanders L, Christy RJ, Christy BA. Expression of the dominant-negative regulator Id4 is induced during adipocyte differentiation. Biochem Biophys Res Commun 1999; 256:614-9. [PMID: 10080947 DOI: 10.1006/bbrc.1999.0386] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Expression of the Id4 gene was investigated during differentiation of 3T3-L1 preadipocytes into mature adipocytes. Id4 is a member of a family encoding non-DNA binding helix-loop-helix proteins proposed to inhibit the activity of basic HLH (bHLH) proteins important in many developmental processes. We show here that Id4 expression is low in confluent preadipocytes and rapidly induced by treatment with the combination of hormones which causes differentiation into mature adipocytes. Id4 expression is also induced by treatment with individual hormones, especially dexamathasone. Id4 mRNA can be detected in mouse and human adipose tissue. Genes encoding E-proteins (bHLH proteins known to interact with and be regulated by Id proteins) are expressed and regulated during differentiation in 3T3-L1 cells. These data suggest that the Id4 transcriptional regulator is playing a role in adipose cell differentiation and suggest that DNA-binding HLH proteins may also be important in regulation of differentiation of these cells.
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Affiliation(s)
- H Chen
- Department of Molecular Medicine/Institute of Biotechnology, University of Texas Health Science Center, San Antonio, Texas, 78245-3207, USA
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