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Qi W, Cao L, Ou D, Cai G, Xu C, Chen J. Establishing a Risk Stratification Model to Identify Clinically High-Risk N0 Breast Cancer Who Could Benefit from Regional Nodal Irradiation: A Single Institute Analysis. Int J Radiat Oncol Biol Phys 2023; 117:e201-e202. [PMID: 37784854 DOI: 10.1016/j.ijrobp.2023.06.1079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) The adverse clinical features for pN0 BC patients significantly varies and there is no established clinical risk stratification system to identify those "high-risk" pN0 BC patients who might benefit from RNI. The purpose of this real-world study was to investigate the risk factors for developing recurrence among patients with pathological T1-3N0 breast cancer (BC) treated with breast-conserving surgery (BCS) followed by whole breast irradiation alone (WBI) and identify those clinically high-risk BCs who could benefit from regional nodal irradiation (RNI). MATERIALS/METHODS Female BC patients treated from 2009 to 2016 were retrospectively reviewed. The disease-free survival (DFS) and overall survival (OS) were estimated by the Kaplan-Meier method, and survival differences were compared with the log-rank test. Univariate and multivariate analysis was performed using Cox logistic regression analysis. An external validation was conducted by using SEER database. RESULTS A total of 622 BC patients treated with BCS+WBI alone were included. With a median follow-up of 82 months, the 7-year OS and DFS for the entire cohort was 97% and 91%, respectively. Multivariable Cox analysis indicated that tumor size (p = 0.006), tumor location (p = 0.033), lymphovascular invasion (LVI) status (p = 0.0028) and Ki-67 index (p = 0.051) were independent risk factors for DFS, while only tumor size was the only independent risk factors for OS (p = 0.029). A scoring system was developed using these four factors and the 7-year DFS and OS were 97% and 96% for patients with 0-1 risk factors, 95% and 82% for patients with ≥2 risk factors (p<0.0001 for DFS, and p = 0.0063 for OS). Based on tumor size and tumor location, an external validation by demonstrated that the 7-year OS was 90% and 88% for patients with 0-1 risk factor, which was significantly better than those defined as high-risk BC patients (82%, p<0.0001). CONCLUSION By using our institute database, we establish a risk stratification system for identifying sub-group of pN0 BC patients, who are at high risk for developing recurrence. The results of our study support tailored RT decision-making according to individual risks, which needed to be confirmed in further studies.
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Affiliation(s)
- W Qi
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - L Cao
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - D Ou
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - G Cai
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - C Xu
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - J Chen
- Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Wang S, Ou D, Cao L, Xu C, Cao W, Chen J, Cai G. Treatment Outcomes and Prognostic Factors of Chemotherapy Combined with Radiotherapy for Patients with Stage I-II Nasal-Type Natural Killer/T-Cell Lymphoma. Int J Radiat Oncol Biol Phys 2023; 117:e491. [PMID: 37785551 DOI: 10.1016/j.ijrobp.2023.06.1723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) The purpose of this study was to assess the treatment outcome and the potential prognostic factors for patients with stage I-II nasal ENKTL treated with radiotherapy (RT) combined chemotherapy (CT). MATERIALS/METHODS From July, 2005 to January, 2019, 118 eligible patients were retrospective included in the study. Among the 118 patients, 84 were male and 34 were female. The median age was 45 years (range: 14-77 years). According to the Ann Arbor staging system, 66 patients had stage I disease (Primary tumor invasion (PTI) was present in 29 patients), and 52 patients had stage II disease. B symptoms were observed in 61 patients. The Eastern Cooperative Oncology Group (ECOG) performance score was 0 to 1 in 88 patients. Cervical lymph node involvement was observed in 51 patients. The primary lesions were located in the nasal cavity in 92 cases and in the Waldeyer ring in 26 cases. Five patients had received RT followed by CT (RT + CT), 20 patients had received CT followed by RT (CT + RT), 90 patients had received CT followed by RT, again followed by CT (CT+RT+CT), and 3 patients had received concurrent chemoradiotherapy (CRT) (1 patient received CRT + CT, other 2 patients received CT+CRT+CT). Patients were irradiated with a median dose of 50 Gy (range, 24-61.2). All patients received chemotherapy, 91 received non-anthracycline-based chemotherapy, whereas 27 patients received anthracycline-based chemotherapy. The median number of courses of chemotherapy was four (range: 1-10). Patients were scored as having low-risk disease (n = 50), intermediate-risk disease (n = 60) or high-risk disease (n = 8) according to the prognostic index of natural killer cell lymphoma (PINK). RESULTS Among the 118 patients, after initial therapy, the complete response (CR) rate was 82.2% (n = 97), and the partial response (PR) rate was 11.0% (n = 13). The stable disease (SD) rate was 2.5% (n = 3), and the progressive disease (PD) rate was 4.2% (n = 5). With a median follow-up of 43 months (range, 4-201) after irradiation, the 3-year PFS and OS were 76.9% and 82.9%, respectively. The 3-year OS rate was 75.0% for RT + CT, 70.0% for CT + RT, 87.1% for CT + RT+ CT, and 50.0% for CRT (P = 0.052). Three-year OS and PFS were 88.6% and 83.4%, respectively, for non-anthracycline-based chemotherapy regimen compared to 61.6% (P = 0.001) and 58.4% (P = 0.003), respectively, for the anthracycline-based chemotherapy regimen. Three-year OS and PFS were 84.0% and 79.0%, respectively, for patients receiving high-dose RT (≥50 Gy, n = 111) compared to 71.4% (P = 0.076) and 71.4% (P = 0.228), respectively, for low-dose RT (<50 Gy, n = 7). In multivariate analysis, adverse factors associated with OS in our study were chemotherapy regimen and response to RT and CT (P = 0.047, <0.001). CONCLUSION Radiotherapy combined with chemotherapy reported promising response rate and a favorable survival for patients with stage I-II nasal ENKTL. Anthracycline-based chemotherapy regimen and no remission after RT and CT were adverse factors of OS.
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Affiliation(s)
- S Wang
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - D Ou
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - L Cao
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - C Xu
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - W Cao
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - J Chen
- Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - G Cai
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Ou D, Cai R, Qi WX, Chen JY, Xu HP. Toripalimab Combined with Chemoradiotherapy for Locally Advanced Cervical Squamous Cell Carcinoma Patients: Early Results of Safety and Feasibility. Int J Radiat Oncol Biol Phys 2023; 117:S40. [PMID: 37784493 DOI: 10.1016/j.ijrobp.2023.06.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) To assess the safety and efficacy of toripalimab combined with chemoradiotherapy for locally advanced cervical squamous cell carcinoma. MATERIALS/METHODS Twenty-two locally advanced cervical cancer patients, regardless of programmed death ligand-1 (PD-L1) status, received toripalimab treatment combined with concurrent chemoradiotherapy (CCRT), includes cisplatin (40 mg/m2, once a week for 5 weeks), radiotherapy (45-50.4 Gy/25-28Fx, 5 fractions a week, followed by brachytherapy 24-30 Gy/3-5Fx) and toripalimab (240mg on day 1, 22 and 43). The primary endpoints were safety and 2-year progression-free survival (PFS). RESULTS The median age was 55 years old (42 to 72), with 2 patients in FIGO stage Ⅱ, 15 patients in stage ⅢC, and 5 patients in stage ⅣA. All patients completed CCRT successfully. Grade Ⅲ and higher adverse events (AEs) were observed in 11 patients (11/22, 50%), and no patient had a grade Ⅴ AE. The most frequent grade Ⅲ AE was leukopenia (8/22, 36.4%). The most common immunotherapy-related adverse event was hypothyroidism (2/22, 9.1%). The objective response rate (ORR) was 100%. At data cutoff (Sep 30, 2022), the median follow-up was 19.7 months (7.67 to 26.1 months). The LC and the PFS rate were 95.5% and 81.8%, and the OS rate was 90.9%. The patients with baseline absolute lymphocyte count (ALC) ≤1.255 × 10^9/L had significant higher rates of metastasis than those with ALC >1.255 × 10^9/L (42.9% vs 0%, p = 0.023). CONCLUSION Toripalimab combined with CCRT achieved good tolerance and demonstrated promising anti-tumor effects in patients with locally advanced cervical cancer. Longer follow-up results and further phase Ⅱ/Ⅲ studies are expected. Chinese Clinical Trial Registry number, ChiCTR2000032879.
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Affiliation(s)
- D Ou
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - R Cai
- Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - W X Qi
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - J Y Chen
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - H P Xu
- Department of Radiation Oncology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Huang H, Wang X, Ou D, Liu X, Wu B, Zhou B, Wang Y, Shi X. Four Variants of SLCO2A1 Identified in Three Chinese Patients with Chronic Enteropathy Associated with the SLCO2A1 Gene. Dig Dis Sci 2021; 66:2992-3001. [PMID: 33000396 DOI: 10.1007/s10620-020-06629-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 09/16/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Chronic enteropathy associated with the SLCO2A1 gene (CEAS) is an enteropathy characterized by multiple small intestinal ulcers of nonspecific histology, also known as chronic nonspecific multiple ulcers of the small intestine. The SLCO2A1 gene encodes a prostaglandin transporter (PGT). AIMS The aim of this study was to investigate the clinical characteristics of ten Chinese patients with intestinal ulcers of unknown origin, screen them for variants of SLCO2A1, and to investigate the expression of PGT in the small intestinal mucosa of patients with CEAS. METHODS Ten Chinese patients with intestinal ulcers of unknown origin were included in this study. Blood samples were collected for whole-exome sequencing and Sanger sequencing of candidate gene variants. Immunohistochemical staining was used to investigate the expression of PGT. RESULTS These ten patients were clinically diagnosed with intestinal ulcers of unknown origin based on criteria established according to earlier publications. Three of them were genetically diagnosed as having CEAS and four candidate variants of the SLCO2A1 gene were identified, among which c.941-1G>A, c.178G>A and c.1681C>T were detected in patients with CEAS for the first time. The terminal ileum was involved in all three patients with CEAS in our study, which was different from the results of Japanese patients. The expression of PGT in the vascular endothelial cells of the intestinal mucosa tissues of patients with CEAS was negative or intermediate. CONCLUSION We summarized the clinical data of ten Chinese patients with intestinal ulcers of unknown origin and identified three novel SLCO2A1 variants from three patients with CEAS. This study improves our understanding of CEAS and broadens the spectrum of SLCO2A1 variants known to cause CEAS.
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Affiliation(s)
- Hui Huang
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xuehong Wang
- Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Dalian Ou
- Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Xiaowei Liu
- Department of Gastroenterology, Xiangya Hospital of Central South University, Changsha, 410008, Hunan, China
| | - Boda Wu
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
- Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Bai Zhou
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
- Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
| | - Yongjun Wang
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
- Department of Gastroenterology, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China.
| | - Xiaoliu Shi
- Department of Medical Genetics, The Second Xiangya Hospital, Central South University, Changsha, 410011, Hunan, China
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Wu Y, Tan Y, Ou D, Wang X, Wang Y. Azathioprine-induced toxoplasma gondii infection in a patient with Crohn's disease with NUDT15 variation: A case report. Medicine (Baltimore) 2021; 100:e25781. [PMID: 33950972 PMCID: PMC8104275 DOI: 10.1097/md.0000000000025781] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 04/15/2021] [Indexed: 01/04/2023] Open
Abstract
INTRODUCTION Azathioprine (AZA) has been widely used for the treatment of various immune-related diseases and has become a mainstay in the treatment of inflammatory bowel disease. However, patients with genetic mutations may experience severe adverse events when treated with azathioprine. Most of the previous literature focused on the TPMP gene-related adverse reactions, herein, we report a case of Crohn's disease patient with nucleoside diphosphate-linked moiety X motif 15 gene (NUDT15) variation and wild-type TPMP gene who developed toxoplasma gondii infection after azathioprine treatment. PATIENT CONCERNS A 56-year-old Crohn's disease patient developed toxoplasma gondii infection within 2 months after the administration of azathioprine; however, he had no relevant high-risk factors. DIAGNOSIS Subsequent genetic testing revealed that the patient was heterozygous for NUDT15. Therefore, it was reasonable to consider that the patient's genetic mutation resulted in reduced tolerance to azathioprine, leading to low immunity and eventually toxoplasma infection. INTERVENTIONS AZA was then discontinued; after anti-infection, antipyretic and other supportive treatments were administered, the patient's condition gradually improved. OUTCOMES The patient was followed up at 1, 3, and 6 months after discharge; fortunately, he was in good health. CONCLUSION We report a case of Crohn's disease in a patient who developed severe pneumonia caused by toxoplasma gondii infection due to the administration of AZA, with normal TPMP gene but NUDT15 gene mutation. This indicates that NUDT15 variation may contribute to severe adverse events in patients treated with azathioprine, and we suggest that NUDT15 genotype be detected before the use of azathioprine in order to provide personalized therapy and reduce side effects.
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Affiliation(s)
- Yanan Wu
- Department of Gastroenterology, The Second Xiangya Hospital
- Research Center of Digestive Disease, Central South University, Changsha, Hunan 410011, China
| | - Yuyong Tan
- Department of Gastroenterology, The Second Xiangya Hospital
- Research Center of Digestive Disease, Central South University, Changsha, Hunan 410011, China
| | - Dalian Ou
- Department of Gastroenterology, The Second Xiangya Hospital
- Research Center of Digestive Disease, Central South University, Changsha, Hunan 410011, China
| | - Xuehong Wang
- Department of Gastroenterology, The Second Xiangya Hospital
- Research Center of Digestive Disease, Central South University, Changsha, Hunan 410011, China
| | - Yongjun Wang
- Department of Gastroenterology, The Second Xiangya Hospital
- Research Center of Digestive Disease, Central South University, Changsha, Hunan 410011, China
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Liu P, Ou D, Niu X, Qiu J, Lou P, Xue L, Xu T, WANG X. Dynamic Changes in Cognitive Function in Patients with Radiation-Induced Temporal Lobe Necrosis after IMRT for Nasopharyngeal Cancer. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2247] [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: 11/25/2022]
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Ou D, Wang X, Xue F, Niu X, Liu P, He X, Hu C. Is Nasopharyngeal Carcinoma In Young Patients A Distinct Clinical Entity? A Single-Institution Case Matched Analysis In The Era Of Intensity-Modulated Radiotherapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Ou D, Cao L, Xu C, Fang Y, Chen J. Interim Analysis of a Phase III Study of Management of Cardiac Toxicity in Breast Cancer Patients treated with Multidisciplinary Therapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Abstract
RATIONALE Epstein-Barr virus (EBV)-associated T-cell lymphoproliferative disorder (LPD) usually occurs in children and young adults. Gastrointestinal involvement is rare. EBV-associated T-cell lymphoproliferative disorder manifesting as intestinal ulcers poses diagnostic challenges clinically and pathologically because of the atypical manifestations. We concluded that some indicators according to our case and literatures, which might be helpful to the diagnosis of EBV-associated LPD manifested as intestinal ulcers. PATIENT CONCERNS Here we present a 26-year-old man with complaints of diarrhea and abdominal pain that had persisted for 1 year. Multiform and multifocal deep ulcers were discovered in the colonoscopy. Cell atypia was not obvious but colitis with crypt distortion was found in pathology. DIAGNOSES According to the symptoms, laboratory examinations, colonoscopy and pathology results, Crohn Disease was diagnosed. INTERVENTIONS Infliximab therapy was initiated based on the diagnosis of Crohn Disease. OUTCOMES After the fifth course of therapy, intermittent fever and hematochezia occurred. Physical examination revealed swollen tonsils and ulcers, and purulent exudate from the right tonsil and palatoglossal arch were observed. Biopsies obtained through colonoscopy and nasopharyngoscopy demonstrated EBV-associated T-cell proliferation disease (level 3). After that, the tissue sample from the first colonoscopy was reexamined immunohistochemically. The result suggested EBV-associated T-cell proliferation disease (level 1). LESSONS When we confront with patients with multiform and multifocal deep intestinal ulcers, not only the common diseases such as Crohn Disease and intestinal tuberculosis should be considered, EBV-associated T-cell proliferation disease should be considered as well. Repeated multiple biopsy, gene rearrangement, EBV DNA quantitative analysis result, EBV-encoded RNA(EBER) and experienced pathologists might be helpful to the diagnosis.
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Affiliation(s)
| | - Yinghuan Dai
- Department of Pathology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, PR China
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Ou D, Adam J, Garberis I, Blanchard P, Nguyen F, Levy A, Casiraghi O, Leijenaar R, Gorphe P, Breuskin I, Janot F, Robert C, Lambin P, Temam S, Scoazec J, Deutsch E, Tao Y. OC-0586 Immunological contexture basis of a prognostic radiomics signature in head and neck cancers. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31006-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wang S, Kirova Y, Shan SC, Cai G, Ou D, Cao L, Cai R, Chen JY. Different radiation techniques to deliver therapeutic dose to the axilla in patients with sentinel lymph node-positive breast cancer: Doses, techniques challenges and clinical considerations. Cancer Radiother 2018; 22:767-772. [DOI: 10.1016/j.canrad.2018.02.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Revised: 12/02/2017] [Accepted: 02/08/2018] [Indexed: 12/18/2022]
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Ou D, Adam J, Garberis I, Blanchard P, Nguyen F, Levy A, Casiraghi O, Gorphe P, Breuskin I, Janot F, Temam S, Scoazec J, Deutsch E, Tao Y. OC-0489: TAM and HLA class I expression in relation to HPV and clinical outcome in head and neck cancer. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)30799-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Cao L, Ou D, Shen KW, Cai G, Cai R, Xu F, Zhao SG, Xu C, Grellier Adedjouma N, Kirova YM, Chen JY. Outcome of postmastectomy radiotherapy after primary systemic treatment in patients with clinical T1-2N1 breast cancer. Cancer Radiother 2018; 22:38-44. [PMID: 29306555 DOI: 10.1016/j.canrad.2017.07.051] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 02/07/2017] [Revised: 07/23/2017] [Accepted: 07/31/2017] [Indexed: 11/17/2022]
Abstract
PURPOSE The role of postmastectomy radiotherapy following primary systemic treatment in patients with clinical T1-2N1 breast cancer remains a controversial issue. The purpose of this study was to evaluate the benefit of postmastectomy radiotherapy following primary systemic treatment. PATIENTS AND METHODS Between 2005 and 2012, in two independent institutions, female patients with T1-2N1 breast cancer receiving primary systemic treatment followed by mastectomy and lymph node dissection because bad response, then treated with or without chest wall and regional lymph node irradiation have been studied retrospectively. The patients received normofractionated radiotherapy using 3D conformal photons or electron techniques. Locoregional recurrence-free survival, distant metastasis-free survival and disease-free survival were calculated using Kaplan-Meier method. Univariate analysis of potential prognostic factors was performed using log-rank test. RESULTS Eighty-eight patients have been studied. Of them, 75 patients received postmastectomy radiotherapy. At surgery, 53 patients achieved ypN0. Median follow-up was 67 months. Postmastectomy radiotherapy significantly improved locoregional recurrence-free survival, with a 5-year rate of 96.9% versus 78.6% in the group that did not have postmastectomy radiotherapy. In the subgroup of 53 patients achieving ypN0, postmastectomy radiotherapy improved locoregional recurrence-free survival (a 5-year rate of 94.7% vs. 72.9%), distant metastasis-free survival (a 5-year rate of 92.8% vs. 75%) and disease-free survival (a 5-year rate of 92.9% vs. 62.5%). By univariate analysis, postmastectomy radiotherapy was the only significant prognostic factor affecting locoregional recurrence-free survival. CONCLUSIONS For patients with clinical T1-2N1 disease, postmastectomy radiotherapy could significantly improve locoregional recurrence-free survival after primary systemic treatment and be even more therapeutic in the subgroup of patients with good response for primary systemic treatment by improving locoregional recurrence-free, distant metastasis-free and disease-free survival. Larger prospective studies are needed to confirm our findings.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Breast Neoplasms/mortality
- Breast Neoplasms/pathology
- Breast Neoplasms/therapy
- Carcinoma, Ductal, Breast/mortality
- Carcinoma, Ductal, Breast/pathology
- Carcinoma, Ductal, Breast/therapy
- Chemotherapy, Adjuvant
- Disease-Free Survival
- Female
- Follow-Up Studies
- Humans
- Lymph Node Excision
- Mastectomy
- Middle Aged
- Neoadjuvant Therapy
- Neoplasm Metastasis
- Neoplasm Recurrence, Local/pathology
- Prognosis
- Radiotherapy, Adjuvant
- Retrospective Studies
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Affiliation(s)
- L Cao
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - D Ou
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - K-W Shen
- Comprehensive Breast Health Center, Ruijin Hospital, Shanghai, China
| | - G Cai
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - R Cai
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - F Xu
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - S-G Zhao
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - C Xu
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - N Grellier Adedjouma
- Department of Radiation Oncology, institut Curie, 26, rue d'Ulm, 75005 Paris, France
| | - Y M Kirova
- Department of Radiation Oncology, institut Curie, 26, rue d'Ulm, 75005 Paris, France.
| | - J-Y Chen
- Department of Radiation Oncology, Ruijin Hospital, Shanghai, China; Shanghai Jiaotong University School of Medicine, Shanghai, China
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Tan Y, Ou D, Wang X, Zhang J, Liu D, Huo J. Closure of an intestinal perforation with an autologous fat plug in a man with Crohn's disease. Endoscopy 2017; 48 Suppl 1:E257-8. [PMID: 27489994 DOI: 10.1055/s-0042-111324] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- Yuyong Tan
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Dalian Ou
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Xuehong Wang
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Jie Zhang
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Deliang Liu
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Jirong Huo
- Department of Gastroenterology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
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Lindsay C, Faugeroux V, Michiels S, Pailler E, Facchinetti F, Ou D, Bluthgen M, Pannet C, Ngo-Camus M, Bescher G, Caramella C, Billiot F, Remon J, Planchard D, Soria JC, Besse B, Farace F. A prospective examination of circulating tumor cell profiles in non-small-cell lung cancer molecular subgroups. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx156] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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16
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Ou D, Cao L, Xu C, Chen J. EP-1126: Whole brain radiotherapy of breast cancer brain metastases: intracranial progression and prognosis. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31562-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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17
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Ou D, Adam J, Garberis I, Blanchard P, Nguyen F, Levy A, Casiraghi O, Gorphe P, Breuskin I, Janot F, Temam S, Scoazec J, Deutsch E, Tao Y. OC-0400: Prognostic impact of tumor infiltrating lymphocytes and PD-L1 expression in head and neck cancers. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30842-3] [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: 12/01/2022]
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Limkin E, Schernberg A, Reuze S, Behar L, Ou D, Tao Y, Deutsch E, Robert C, Ferte C. An advanced tumor shape radiomic signature predicts recurrence of locally advanced (LA) HNSCC patients (pts). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw376.35] [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: 11/13/2022] Open
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Bluthgen M, Dansin E, Ou D, Lena H, Mazieres J, Pichon E, Thillays F, Massard G, Quantin X, Oulkhouir Y, Hon TNT, Thiberville L, Clement-Duchene C, Lindsay C, Missy P, Molina T, Girard N, Besse B, Thomas P. Quality of resection and outcome in stage III thymic epithelial tumors (TET): A retrospective analysis of 150 cases from the national network RYTHMIC experience. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw391.02] [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: 11/13/2022] Open
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Abstract
In this paper the preliminary results of a four year longitudinal study concerned with job design and levels of strain among a population of Prison Officers are reported. The job design factors that were studied related to perceived demands, constraints and supports. It was hypothesised that (i) those officers who perceive themselves as having jobs high in demand and level of constraint would suffer more strain than those of equal demand but who had a greater decision latitude (i.e., fewer constraints). It was further hypothesized that (ii) those in highly demanding and constrained jobs would show fewer strain symptoms if the environment in which they worked was perceived as providing social support. Preliminary analysis of the data shows that the first hypothesis was not supported for a measure of general physical well-being. However, there was evidence that those working in high security prisons showed significantly lower levels of general physical health than those working in low security environments. For measures of psychological well-being both hypotheses (i) and (ii) were partially supported. Those who perceived themselves as having high levels of support were found to suffer less from anxiety and depression. These effects were most apparent in the higher security prisons. Additional analyses have shown that the demands supports and constraints model is probably too simplistic and that other variables (e.g. personality) and further refinements to the model would help to account for additional variance in the measures of strain.
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Affiliation(s)
- D.L. Morrison
- Dept. of Psychology, Murdoch University, Perth, Western Australia
| | - D. Ou
- Dept. of Psychology, Murdoch University, Perth, Western Australia
| | - D. Roberts
- Dept. of Psychology, Murdoch University, Perth, Western Australia
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Ou D, Levy A, Blanchard P, Leijenaar R, Robert C, Nguyen F, Lambin P, Deutsch E, Tao Y. 2876 Radiomics feature quantification in patients with locally advanced head and neck carcinomas treated with chemoradiotherapy. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31613-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tai J, Cheung SSC, Ou D, Warnock GL, Hasman D. Antiproliferation activity of Devil's club (Oplopanax horridus) and anticancer agents on human pancreatic cancer multicellular spheroids. Phytomedicine 2014; 21:506-514. [PMID: 24215675 DOI: 10.1016/j.phymed.2013.10.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 07/23/2013] [Revised: 08/07/2013] [Accepted: 10/04/2013] [Indexed: 06/02/2023]
Abstract
Devil's club (DC, Oplopanax horridus) is an important medicinal herb of the Pacific Northwest which has significant antiproliferation activity against a variety of human tumor cell lines in vitro. This study compared the antiproliferation activity of DC extract alone, and in combination with chemotherapeutic agents gemcitabine (GEM), cisplatin (CDDP), and paclitaxel (PTX) on human pancreatic cancer PANC-1 3D spheroids and 2D monolayer cells. 3D tumor spheroids were prepared with a rotary cell culture system. PANC-1 3D spheroids were significantly more resistant to killing by DC extract, GEM and PTX compared to 2D cells, with IC50 levels closer to that observed in vivo. DC extract significantly enhanced the antiproliferation activity of CDDP and GEM at some concentrations. The bioactive compound identified as a polyacetylene showed strong antiproliferation activity against PANC-1 2D cells and 3D spheroids with IC50 at 0.73±0.04 and 3.15±0.16μM, respectively. 3D spheroids and 2D cells differentially expressed a number of apoptosis related genes. Cell cycle analysis showed that the proportion of cells in S phase was increased and in G2/M phase reduced in 3D spheroids compared to 2D cells. DC extract can potentially be used to enhance the activity of chemotherapeutic agents against pancreatic cancer cells. Use of 3D spheroid model for screening of natural products can potentially increase the efficiency in discovering in vivo bioactive compounds.
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Affiliation(s)
- J Tai
- Department of Pathology and Laboratory Medicine, Child and Family Research Institute, University of British Columbia, Canada.
| | - S S C Cheung
- Department of Surgery, University of British Columbia, Canada
| | - D Ou
- Department of Surgery, University of British Columbia, Canada
| | - G L Warnock
- Department of Surgery, University of British Columbia, Canada
| | - D Hasman
- Forensic Science Center, British Columbia Institute of Technology, Canada
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Ou D, Zhang Y, He X, Gu Y, Hu C, Ying H, Zhu G, Wu Y, Yue L, Mao J. Magnetic Resonance Sialography to Evaluate Radiation-Induced Xerostomia in Patients With Early-Stage Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ou D, Hsu C, Huang Y, Shen Y, Lee B, Cheng A. 309 Potentiating the anti-tumor efficacy of molecular targeted therapy for hepatocellular carcinoma by inhibiting the insulin-like growth factor signaling pathway. EJC Suppl 2010. [DOI: 10.1016/s1359-6349(10)72016-4] [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: 11/16/2022] Open
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25
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Ou D, He X, Hu C, Zhu G, Ying H, Wu Y. Induction Chemotherapy with Cisplatin and Gemcitabine followed by Radiotherapy for Locally Advanced Nasopharyngeal Carcinoma. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Liu D, Lu F, Ou D, Zhou Y, Huo J, Zhou Z. [Endoscopic band ligation versus endoscopic hemoclip placement for bleeding due to Dieulafoy lesions in the upper gastrointestinal tract]. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2009; 34:905-909. [PMID: 19779265] [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: 05/28/2023]
Abstract
OBJECTIVE To compare the hemostatic efficacy and safety of endoscopic band ligation(EBL) and endoscopic hemoclip placement(EHP) for bleeding due to Dieulafoy lesions in the upper gastrointestinal tract. METHODS Between February 2004 and October 2006, 34 patients with Dieulafoy lesions in the upper gastrointestinal tract were prospectively enrolled,including 22 cases of lesions in the stomach,10 in gastrointestinal stoma,and 2 in duodenal, who were randomly assigned to undergo EBL (n=16) or EHP (n=18). The therapeutic results of these 2 groups were compared. RESULTS The median number of O-ring or hemoclip required in the EBL group and the EHP group was similar. The rate of primary haemostasis,recurrent bleeding,transfer into surgery, complications, and average stay and blood transfusion requirements did not significantly differ in the 2 groups (P>0.05). CONCLUSION In this study, no significant differences are detected in the efficacy and the safety of EBL vs. EHP for bleeding due to Dieulafoy lesions in the upper gastrointestinal tract.
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Affiliation(s)
- Deliang Liu
- Department of Gastroenterology, Second Xiangya Hospital, Central South University, Changsha, China
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Liu X, Liu D, Li J, Ou D, Zhou Z. [Safety and efficacy of carbon dioxide insufflation during colonoscopy]. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2009; 34:825-829. [PMID: 19734597] [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: 05/28/2023]
Abstract
OBJECTIVE To assess the safety and efficacy of carbon dioxide (CO(2)) in colonoscopy examination. METHODS We randomized 349 patients to undergo colonoscopy with insufflation of air (n=175) or CO(2) (n=174). At colonoscopy, p (ET CO(2)) was observed at 4 time points: before the exam, arrived caecum, back rectum, and after the exam. Patient's experience of pain in the end and after the examination at 1, 3, 6, and 24 h was registered using a visual analog scale (VAS). Sedation was not used routinely. RESULTS The groups were similar in age, sex, inspection time, and caecal intubation rate (all P>0.05). There were no significant differences in p (ET CO(2)) values between the 2 groups before and after the procedure (all P>0.05). VAS scores in the CO(2) group at various time points after the examination were significantly lower than those in the air group (all P<0.05). The percent of VAS scores of 0 in the CO(2) group after 1, 3, 6, and 24 h was significantly higher than that in the air group (all P<0.01). CONCLUSION Injection of CO(2) for colonoscopy will not cause CO(2) retention, and it may significantly reduce the pain, which is safe and effective.
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Affiliation(s)
- Xiongxiang Liu
- Department of Gastroenterology, Second Xiangya Hospital, Central South University, Changsha 410011, China
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Li K, Qiao J, Zhao L, Dong S, Ou D, Wang J, Wang H, Xu T. Increased calcium deposits and decreased Ca2+-ATPase in right ventricular myocardium of ascitic broiler chickens. ACTA ACUST UNITED AC 2007; 53:458-63. [PMID: 17054481 DOI: 10.1111/j.1439-0442.2006.00856.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Right ventricular hypertrophy and failure is an important step in the development of ascites syndrome (AS) in broiler chickens. Cytoplasmic calcium concentration is a major regulator of cardiac contractile function and various physiological processes in cardiac muscle cells. The purpose of this study was to measure the right ventricular pressure and investigate the precise ultrastructural location of Ca(2+) and Ca(2+)-ATPase in the right ventricular myocardium of chickens with AS induced by low ambient temperature. The results showed that the right ventricular diastolic pressure of ascitic broilers was significantly higher than that of control broilers (P < 0.01), and the maximum change ratio of right intraventricular pressure (RV +/- dp/dt(max)) of ascitic broilers was significantly lower than that of the controls (P < 0.01). Extensively increased calcium deposits were observed in the right ventricular myocardium of ascitic broilers, whereas in the age-matched control broilers, calcium deposits were much less. The Ca(2+)-ATPase reactive products were obviously found on the sarcoplasmic reticulum and mitochondrial membrane of the control right ventricular myocardium, but rarely observed in the ascitic broilers. The data suggest that in ascitic broilers there is the right ventricular diastolic dysfunction, in which the overload of intracellular calcium and the decreased Ca(2+)-ATPase activity might be the important factors.
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Affiliation(s)
- K Li
- Department of Animal Physiopathology, College of Veterinary Medicine, China Agricultural University, Beijing 100094, China
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Yang Y, Liu M, Xu S, Hou L, Ou D, Liu H, Cheng S, Hofmann T. HCHs and DDTs in sediment-dwelling animals from the Yangtze Estuary, China. Chemosphere 2006; 62:381-9. [PMID: 15993466 DOI: 10.1016/j.chemosphere.2005.04.102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2005] [Revised: 04/01/2005] [Accepted: 04/18/2005] [Indexed: 05/03/2023]
Abstract
HCHs and DDTs in sediment-dwelling animals including mollusks and crabs from the Yangtze Estuary were determined by GC-ECD. Levels of t-HCH were in the range of 1.2-5.5 ng g(-1) and averaged 3.5 ng g(-1) in mollusks, while t-DDT concentrations ranged from 26.0 to 68.8 ng g(-1), with a mean of 34.5 ng g(-1). In crabs t-HCH concentrations varied from 2.0 to 25.7 ng g(-1) and averaged 13.8 ng g(-1), whereas the concentrations of t-DDT were in the range of 1.5-24.8 ng g(-1) with a mean value of 5.9 ng g(-1). The HCHs and DDTs levels depend on geographical position and sources, showing the high levels at fresh water area in the estuary, such as XP, CM and LHK sites, and lower at brackish water area, such as FX site, and little difference between species. Results also indicate there was no significant relationship between t-HCH (t-DDT) concentrations and lipid contents both in mollusks and crabs because of non-equilibrium state under a specific estuarine dynamics; smaller individuals accumulated more HCHs and DDTs than larger individuals of mollusks at LHK site, showing different uptake rate for these pesticides; moreover, HCHs and DDTs levels were lower in female crab bodies than male crab bodies suggesting that the release of spawning. BSAFs (Biota- Sediment Accumulation Factors) from sediment-dwelling animals for HCHs and DDTs show a significant "one high with two low" and "one low with two high" effect in the Yangtze Estuary.
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Affiliation(s)
- Y Yang
- Applied Geology, Institute of Geoscience, Johannes Gutenberg-University, Mainz, Germany
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30
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Liu M, Yang Y, Xu S, Liu H, Hou L, Ou D, Liu Q, Cheng S. HCHs and DDTs in salt marsh plants (Scirpus) from the Yangtze estuary and nearby coastal areas, China. Chemosphere 2006; 62:440-8. [PMID: 15964053 DOI: 10.1016/j.chemosphere.2005.04.062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2004] [Revised: 03/08/2005] [Accepted: 04/17/2005] [Indexed: 05/03/2023]
Abstract
HCHs and DDTs in salt marsh plants taken from intertidal flats in the Yangtze estuary and coastal area in April and July 2002 were determined by GC-ECD. A significant seasonal effect was observed for HCHs and DDTs in sources and concentration levels in different sample types including above-ground tissues and roots as well as the whole plants and rhizospheric sediments. The results indicated that the concentration of t-HCH was higher in the above-ground tissues than in their roots in April; however, the partitioning of DDTs between contaminated sediments and the roots showed the higher concentrations of t-DDT in their roots. HCHs and DDTs concentration levels were higher in above-ground tissues than in roots in July. BCFs of HCHs and DDTs exhibited lower values with higher levels of contaminants in sediments, and higher values with lower levels in sediments.
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Affiliation(s)
- M Liu
- Department of Geography, Key Laboratory of Geographical Information Sciences of the State Ministry of Education, East China Normal University, Shanghai 200062, PR China.
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31
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Ou D, Wang X, Metzger DL, Robbins M, Huang J, Jobin C, Chantler JK, James RFL, Pozzilli P, Tingle AJ. Regulation of TNF-Related Apoptosis-Inducing Ligand-Mediated Death-Signal Pathway in Human β Cells by Fas-Associated Death Domain and Nuclear Factor κB. Hum Immunol 2005; 66:799-809. [PMID: 16112027 DOI: 10.1016/j.humimm.2005.03.009] [Citation(s) in RCA: 11] [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] [Received: 01/29/2005] [Revised: 03/21/2005] [Accepted: 03/25/2005] [Indexed: 01/30/2023]
Abstract
Transfectants of human CM and NES2Y beta cell lines and primary islets transfected by FADD-DN (dominant-negative form of Fas-associated death domain), a mutant of FADD and/or a superrepressor of nuclear factor kappaB (NF-kappaB) (AdIkappaB(SA)2), were examined for their susceptibility to the TRAIL (TNF-related apoptosis-inducing ligand)-induced death signal pathway, compared with controls, wild-type cells, and vector transfectants in caspase fluorescence, Western blot, electrophoretic mobility shift, apoptosis, and cytotoxicity assays. FADD-DN inhibited caspase-8 activation induced by TRAIL in the transfectants of CM and NES2Y cells. TRAIL-induced apoptosis and cytotoxicity to the FADD-DN transfectants were decreased in comparison to those responses in controls (CM, p < 0.01 and p < 0.01; NES2Y, p < 0.05, and p < 0.02, respectively). When CM, NES2Y, and primary islet cells were transfected by AdIkappaB(SA)2, TRAIL-induced IkappaB degradation and nuclear translocation of NF-kappaB p50/p65 were blocked. TRAIL-induced apoptosis and cytotoxicity to AdIkappaB(SA)2 transfectants of these cells were also reduced (CM, p < 0.02 and p < 0.02; NES2Y, p < 0.01 and p < 0.01, respectively, and islet p < 0.01 for cytotoxicity). Finally, cytotoxicity induced by TRAIL in CM and NES2Y cells transfected with both FADD-DN and AdIkappaB(SA)2 was reduced, compared with that observed in these cells transfected with either FADD-DN alone or AdIkappaB(SA)2 alone, suggesting that FADD and NF-kappaB have synergistic proapoptotic regulatory effects on the susceptibility of beta cell lines and islet cells to TRAIL-induced destruction.
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Affiliation(s)
- D Ou
- Department of Pediatrics, Faculty of Medicine, University of British Columbia, BC, Vancouver, Canada.
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Liu M, Yang Y, Hou L, Xu S, Ou D, Zhang B, Liu Q. Chlorinated organic contaminants in surface sediments from the Yangtze Estuary and nearby coastal areas, China. Mar Pollut Bull 2003; 46:672-676. [PMID: 12735965 DOI: 10.1016/s0025-326x(03)00050-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Affiliation(s)
- M Liu
- Department of Geography, Open Laboratory of Urban Environmental Process of the State Ministry of Education, East China Normal University, Shanghai 200062, China.
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Ou D, Metzger DL, Wang X, Huang J, Pozzilli P, Tingle AJ. TNF-related apoptosis-inducing ligand death pathway-mediated human beta-cell destruction. Diabetologia 2002; 45:1678-88. [PMID: 12488957 DOI: 10.1007/s00125-002-0926-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [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] [Received: 03/21/2002] [Revised: 06/24/2002] [Indexed: 11/30/2022]
Abstract
AIMS/HYPOTHESIS The aim of this study is to investigate whether apoptosis in human beta cells can be related to the induction of the tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) pathway. METHODS We examined the expression of TRAIL and TRAIL receptors in two human pancreatic beta-cell lines and in human primary islet cells using RT-PCR assays and flow cytometric analyses and tested TRAIL-mediated beta-cell destruction in (51)Cr release cytotoxicity assays, Annexin-V and APO-DIREC assays. RESULTS Most of the human beta cells express TRAIL receptors-R1, -R2, -R3, -R4 and/or TRAIL. TRAIL induced much stronger cytotoxicity and apoptosis to beta-cell lines CM and HP62 than did FasL, TNF-alpha, LTalpha1beta2, LTalpha2beta1, LIGHT, and IFN-gamma. The cytotoxicity and apoptosis induced by TRAIL to beta-cell lines CM were inhibited competitively by soluble TRAIL receptors, R1, R2, R3 or R4. Treatment of these beta cells with antibodies against TRAIL receptors was able to block the cytotoxicity of TRAIL to these cells. Beta-cell antigen-specific CTL (CD4(+) and CD8(+)) clones express TRAIL, suggesting that these cells are potential sources of TRAIL-inducing beta-cell destruction. Normal primary islet cells from most donors are resistant to the cytotoxicity mediated by TRAIL. However, treatment with an inhibitor of protein synthesis (cycloheximide) or with an enzyme (PI-PLC) that can remove TRAIL-R3 from the islet-cell membrane was able to increase the susceptibility of TRAIL-resistant primary islet cells to the TRAIL death pathway. CONCLUSION/INTERPRETATION The TRAIL death pathway is present and can function in human islet beta cells, but unidentified inhibitors of the TRAIL death pathway are present in normal islet cells.
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Affiliation(s)
- D Ou
- Department of Pediatrics, University of British Columbia, Canada.
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Anderson KM, Alrefai WA, Dudeja PK, Jadko S, Bonomi P, Hu Y, Ou D, Harris JE. Increased cytosol Ca(2+) and type 1 programmed cell death in Bcl-2-positive U937 but not in Bcl-2-negative PC-3 and Panc-1 cells induced by the 5-lipoxygenase inhibitor MK 886. Prostaglandins Leukot Essent Fatty Acids 2002; 66:443-52. [PMID: 12054916 DOI: 10.1054/plef.2001.0372] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
MK 886, an arachidonic acid-related analog which inhibits the enzyme, 5-lipoxygenase by an indirect mechanism involving the 5-lipoxygenase activating protein, rapidly increased U937 cytosol Ca(2+), much of which localized around the cell nuclei. Five-lipoxygenase activity was not directly involved since the direct redox-dependent 5-LPOx inhibitor, SC-41661A did not increase Ca(2+). U937 cells subsequently undergo classic type 1 programmed cell death. At least initially the ionized calcium originates from internal stores. Coincident with the rise in U937 ionized calcium, MK 886 rapidly increased reactive oxygen species and reduced mitochondrial membrane potential, as judged by several fluorescent probes. The Ca(2+) response of myeloid leukemia-derived HL-60 cells to MK 886 was similar and both cell lines express Bcl-2 protein. Bcl-2-negative Panc-1 and PC-3 cells did not respond to MK 886 with a Ca(2+) signal but did develop oxidative stress and a decline in mitochondrial membrane potential; these events are thought to contribute to the inhibition of cell proliferation and induction of a type 2 PCD. In addition to its marked inhibition of Bcl-2 mRNA synthesis, an interesting hypothesis is that MK 886, serving as a low molecular weight ligand, either by direct or indirect inhibition of U937 Bcl-2 protein function, possibly related to an ion channel activity, alters the distribution of intracellular, possibly nuclear Ca(2+), thereby promoting the development of type 1 programmed cell death.
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Affiliation(s)
- K M Anderson
- Department of Medicine, Section of Medical Oncology, Chicago, IL 60612, USA
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Anderson KM, Alrefai WA, Anderson CA, Ho Y, Jadko S, Ou D, Wu YB, Harris JE. A response of Panc-1 cells to cis-platinum, assessed with a cDNA array. Anticancer Res 2002; 22:75-81. [PMID: 12017337] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
BACKGROUND The problem posed by the lack of response of cells in most solid cancers to current chemotherapy generally remains intractable. MATERIALS AND METHODS The use of cDNA arrays represents one global approach to identifying reasons for this failure. A messenger RNA response of pancreatic cancer (Panc-1) cells after culture for 24 hours with 12 microM cis-platinum was analyzed with a commercial cDNA array. RESULTS Major drug-induced events included inhibition of messenger RNAs associated with cell proliferation and up-regulation of generally countervailing DNA repair, cellular stress, heat shock protein, glutathione stress-related and multiple drug resistance enzyme messenger RNAs, accompanied by a limited programmed cell death response. CONCLUSION Induction of widespread normal stress-induced countervailing mRNAs by comparatively non-selective agents such as cis-platinum strongly biases against a successful therapeutic outcome. This paradoxical result of a therapeutic intent provides a further compelling argument for the use of specifically-targeted therapy such as growth factor receptor, tyrosine kinase and other discretely focused agents, probably employed in combinations based on expression of their targets in an individual patient's cancer, as identified by cDNA or proteonomic arrays.
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Affiliation(s)
- K M Anderson
- Department of Medicine, Rush Medical College, Chicago, IL 60612, USA.
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Ou MC, Pang CC, Chen FM, Su CH, Ou D. Antibiotic treatment for threatened abortion during the early first trimester in women with previous spontaneous abortion. Acta Obstet Gynecol Scand 2001; 80:753-6. [PMID: 11531620 DOI: 10.1034/j.1600-0412.2001.080008753.x] [Citation(s) in RCA: 8] [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: 11/23/2022]
Abstract
BACKGROUND We retrospectively examined the usefulness of antibiotic therapy for management of first-trimester threatened abortion in women with previous spontaneous abortion. METHODS From 1993 through 1999, women with first-trimester threatened abortion received antibiotic therapy. Only those with gestational age less than 9 weeks and previous spontaneous abortion were included in this analysis. Women with mild abdominal cramping received amoxicillin plus erythromycin for 1 week; those with severe abdominal pain received amoxicillin plus clindamycin for 1 week. Recurrence was documented on the basis of either lower abdominal pain or vaginal bleeding. RESULTS Of the 23 women included, 15 (65%) had abnormal vaginal flora (a score above 4, Nugent's criteria). Seven of 16 women who received amoxicillin plus clindamycin and three of seven who received amoxicillin plus erythromycin had complete resolution of lower abdominal pain and vaginal bleeding without recurrence (p=1). The recurrence rate was higher, though not significantly, in women with abnormal bacterial vaginal flora (8/15 vs. 2/8, p=0.379). Twenty-two (96%) of the 23 pregnancies were carried to term, with no identifiable neonatal anomalies. CONCLUSIONS These results suggest the usefulness of early antibiotic therapy in preventing pregnancy loss in women with threatened abortion early in the first trimester, and warrant further clinical trials.
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Affiliation(s)
- M C Ou
- Department of Obstetrics and Gynecology, Su Woman Hospital, Taipei 108, Taiwan
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Ou D, Bonomi P, Jao W, Jadko S, Harris JE, Anderson KM. The mode of cell death in H-358 lung cancer cells cultured with inhibitors of 5-lipoxygenase or the free radical spin trap, NTBN. Cancer Lett 2001; 166:223-31. [PMID: 11311496 DOI: 10.1016/s0304-3835(01)00411-6] [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: 11/23/2022]
Abstract
The 5-lipoxygenase inhibitors SC41661A and MK886 with different mechanisms of action and the free radical spin trap, NTBN inhibit proliferation of the human bronchiolar lung cancer cell line NCI H-358 (5807 CRL). With continued culture, the agents induced a form of programmed cell death in which DNA laddering was not detected and ultrastructural changes were not characteristic of classic 'type 1' cellular suicide. The changes were more consistent with a type 2 cytosolic, autophagic form of PCD. MK886 induced strikingly abnormal mitochondrial morphology. Since the lipoxygenase inhibitors and NTBN induce classic type 1 PCD in U937 monoblastoid cells, these agents can activate either pathway, depending upon cell type. It is not certain whether activation of type 1 or 2 pathways depends entirely upon cell lineage and/or initiating agent, if all cells retain both pathways, and if type 1 PCD a more effective mediator of the process. These are all relevant questions for assessing the impact of PCD on malignant cell survival and considering ways in which it might be enhanced.
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Affiliation(s)
- D Ou
- Department of Pathology, University of Illinois at Chicago; 60612, USA
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Ou D, Mitchell LA, Metzger DL, Gillam S, Tingle AJ. Cross-reactive rubella virus and glutamic acid decarboxylase (65 and 67) protein determinants recognised by T cells of patients with type I diabetes mellitus. Diabetologia 2000; 43:750-62. [PMID: 10907121 DOI: 10.1007/s001250051373] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [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: 10/27/2022]
Abstract
AIMS/HYPOTHESIS To examine the cross-reaction between viral and beta-cell protein determinants and to further understand the potential role of this mechanism in Type I (insuline-dependent) diabetes mellitus. METHODS Immune responses to a panel of 28 viral and beta-cell protein peptides representing selected sequences of rubella virus (RV), Coxsackie virus, human 38 KDa31G and glutamic acid decarboxylase (GAD 65 and 67) proteins in proliferation or cytotoxicity assays have been studied using uncloned and cloned T-cell cohorts from a group of 60 Type I diabetic patients. RESULTS Peptide GAD65(252-266) induced the responses of patients with recent onset diabetes in proliferation assays at the highest frequency (77%), whereas GAD67(212-226) stimulated the cellular responses at the highest rate (61%) in patients with late-onset diabetes. RVE1(157-176) was recognised by all groups of patients at the highest frequency and the largest amplitude among the viral peptides tested. T-cell clones specific to GAD65(252-266), GAD65(274-286) or GAD67(212-226) were tested in cytotoxicity assays for their responses to rubella virus peptides. Each of these T-cell clones cross-reacted with two to four rubella virus peptides, including RVE1(157-176) and RVE2(87-107). Analysis of the sequences of cross-reactive viral and glutamic acid decarboxylase antigens showed that these epitopes shared similar peptide binding motifs to HLA DR3/DR4. There is a statistically significant correlation between the response amplitude of patient's peripheral blood mononuclear cells to RVE1(157-176), RVE2(87-107) and GAD65(274-286) in patients with recent onset diabetes, and to RVE1(157-176) and GAD67(212-226) in patients with late onset diabetes. CONCLUSION/INTERPRETATION Cross-reactive glutamic acid decarboxylase and rubella virus determinants identified by T-cell clones were also recognised at high frequencies by general T-cell populations of Type I diabetic patients.
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Affiliation(s)
- D Ou
- Department of Paediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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Anderson KM, Alrefai WA, Bonomi P, Dudeja P, Ou D, Anderson C, Harris JE. Altered oncogene, tumor suppressor and cell-cycle gene expression in PANC-1 cells cultured with the pleiotrophic 5-lipoxygenase inhibitor, MK886, assessed with a gene chip. Anticancer Res 1999; 19:3873-87. [PMID: 10628326] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
We describe a genomic response of mRNAs associated with a subset of oncogenes, tumor suppressor and cell cycle-related genes in proliferating human Panc-1 pancreatic cancer cells after 24 hours of culture with MK886, a pleotrophic 5-lipoxygenase inhibitor. Ninety-eight of these cDNAs are represented in one of the sub-arrays included in the Clontech Human cDNA Expression Array. In this initial analysis, control cells exhibited apparent widespread low levels of disparate mRNA synthesis. In cells cultured with 40 microM MK886 for 24 hr, while most expressed genes, including a number of specific proliferation-enhancing genes such as c-myc were inhibited, 19 other ones including some countervailing genes including tyrosine SRC protein kinase, cyclins B1 and D1, CDC25B phosphatase and 40s ribosomal S19, amounting to 19 percent of the cDNAs resident on the chip were up-regulated at > 1.10 experimental/control values. Therapy-induced activation of compensatory proliferative genomic responses provides an additional explanation why malignant cells can fail therapy. Among their many future uses, gene chips clearly will be an extremely powerful tool for identifying relationships between the hierarchical linear and non-linear control and implementation-related cellular events and for identifying potential molecular targets tor cancer therapy.
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Affiliation(s)
- K M Anderson
- Department of Medicine, Rush Medical College, Chicago, IL, USA
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Ou D, Jonsen LA, Metzger DL, Tingle AJ. CD4+ and CD8+ T-cell clones from congenital rubella syndrome patients with IDDM recognize overlapping GAD65 protein epitopes. Implications for HLA class I and II allelic linkage to disease susceptibility. Hum Immunol 1999; 60:652-64. [PMID: 10439311 DOI: 10.1016/s0198-8859(99)00037-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [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: 10/17/2022]
Abstract
To fully characterize human glutamic acid decarboxylase (GAD)65 protein T-cell epitopes associated with insulin-dependent diabetes mellitus (IDDM), CTL clones specific to GAD65 protein antigens were isolated from two congenital rubella syndrome (CRS)-associated IDDM patients. Overlapping nonamer T-cell epitopes recognized by both CD4+ or CD8+ CTL clones within peptides GAD65(252-266) and GAD65(274-286) were identified as sequences bounded by GAD65(255-266) with 6/9 overlapping residues, and GAD65(276-285) with 8/9 overlapping residues, respectively, using two panels of overlapping peptide analogs in cytotoxicity assays. HLA restrictive elements of the T-cell clones were also identified using a panel of B cell lines with different HLA phenotypes as targets in cytotoxicity assays. The antigenic GAD65 peptides elicited cytotoxic responses of peptide-specific CD4+ T-cell clones in the context of HLA DRB1*0404. The CD8+ T-cell clone specific to GAD65(255-263) was found to be restricted by HLA A3 and A11. Similarly, the CD8+ T-cell clone specific to GAD65(277-285) killed peptide-sensitized target cells expressing HLA B35 and B15. The observed HLA restriction of these overlapping epitopes implies that a tandem of [DRB1*0404-A11(3)] and/or a tandem of [DRB1*0404-B35(15)] might predispose CRS patients to development of IDDM.
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Affiliation(s)
- D Ou
- Department of Paediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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Anderson KM, Ou D, Wu YB, Jajeh A, Harris JE. Induction of type 1 programmed cell death in U937 cells by the antioxidant, butylated hydroxy-toluene or the free radical spin trap, NTBN. Leuk Res 1999; 23:665-73. [PMID: 10400188 DOI: 10.1016/s0145-2126(99)00081-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Oxidative stress can initiate programmed cell death and contributes to the patho-physiology of a number of diseases. Low micromolar to millimolar concentrations of various antioxidants or free radical scavengers promote cell growth and reduce cellular suicide induced by several functionally distinct agents, including some known to produce oxidative stress. Severe anoxia or inhibitors of oxidative phosphorylation also initiate programmed cell death. These results seem paradoxical. In order to compare the response of U937 monoblastoid cells to higher concentrations of an antioxidant or a free radical-spin trap, cells were cultured with 20-80 microM concentrations of butylated hydroxy-toluene or with 5 to 60 mM concentrations of the free radical spin trap, N-tertiary butyl phenyl-nitrone. At these concentrations, both agents inhibited cellular proliferation and induced oligosomic DNA, detected by its 'laddering' after electrophoresis on agarose, confirmed by TUNEL (BHT) or flow cytometric (NTBN) evidence of hypodiploid DNA and ultrastructural evidence of a type 1 programmed cell death. The ability of hydroxy-toluenes to oxidize DNA and promote carcinogenesis and whether free radical spin traps could augment or interfere with the response of malignantly transformed cells to chemotherapy or ionizing radiation provide the raison d'etre of these studies.
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Affiliation(s)
- K M Anderson
- Department of Medicine, Rush Medical College, Chicago, IL 60612, USA.
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Abstract
Oxidative stress, originating from reactive oxygen species and free radicals provides a constant challenge to eukaryotic cell survival. While implicated in a number of degenerative diseases, some associated with aging and with aging itself, the manner and extent to which oxidative stress contributes to the initiation or implementation of programmed-cell death is problematic. If oxidative stress is an important modulator of programmed-cell death, any ability intentionally to augment or inhibit it might ameliorate diseases in which the process is abnormally underactive or overactive.
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Affiliation(s)
- K M Anderson
- Department of Medicine, Rush Presbyterian St Luke's Medical Center, Chicago, IL 60612, USA
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Abstract
Generally it has been believed that a maximum therapeutic induction of programmed cell death in cancer cells is universally desirable. As a corollary, the presence of Bcl-2, a major anti-programmed cell death protein, is considered an unfavorable prognostic sign. The latter is not and the former may not be universally true.
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Affiliation(s)
- D Ou
- Department of Pathology, University of Illinois Medical School at Chicago and the West Side V.A. Hospital, USA
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Abstract
BACKGROUND Products of the arachidonic acid-metabolizing enzyme, 5-lipoxygenase, stimulate the growth of several cell types. Selective inhibitors of the enzyme, including SC41661A and MK886, reduce PC-3 prostate cell proliferation. With continued culture, cells die, but the mode of death, necrotic or nonnecrotic, has not been established. METHODS Flow cytometry, laddering after agarose electrophoresis of DNA from inhibitor-treated cells, and light and electron microscopy were employed to examine the type of death in PC-3 prostate cells cultured with either 5-lipoxygenase inhibitor. RESULTS The inhibitors induced nonnecrotic, programmed cell death. SC41661A-treated cells exhibited "foamy," vacuolated cytoplasm and mitochondria with disrupted cristae and limiting membranes, while some cells contained numerous polysomes and extended hypertrophic Golgi and secretory cisternal networks. A proportion of the treated cells detached and the nuclei of these cells were characteristic of type 1 "apoptotic" programmed cell death. MK886, a 5-lipoxygenase-inhibitor with a different mechanism of action, induced nonnecrotic changes largely confined to the cytoplasm, most consistent with type 2 "autophagic" programmed cell death. In preliminary studies of mechanism, we demonstrated that PC-3 cells express mRNA for 5-lipoxygenase and for 5-lipoxygenase-activating protein. The less active inhibitor, SC45662 neither reduced proliferation nor induced DNA laddering. The antioxidant, N-acetyl-l-cysteine but not butylated hydroxy toluene or alpha tocopherol, partially reduced the inhibition of proliferation from SC41661A. CONCLUSIONS SC41661A and MK886 inhibit PC-3 cell proliferation and induce a form of type 1 or type 2 programmed cell death, respectively. PC-3 cells contain messenger RNA for 5-lipoxygenase and 5-lipoxygenase-activating proteins. Drug-induced changes included altered redox potential, inferred from the increased survival due to the antioxidant and glutathione precursor, N-acetyl-l-cysteine. PC-3 cells are an appropriate model for studying the mechanism responsible for 5-lipoxygenase inhibitor-induced cellular suicide.
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Affiliation(s)
- K M Anderson
- Department of Medicine, Rush Medical College, Chicago, Illinois 60612, USA
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Ou D, Mitchell LA, Décarie D, Tingle AJ, Lacroix M, Zrein M. Point mutation of a rubella virus E1 protein T-cell epitope by substitution of single amino acid reversed the restrictive HLA-DR polymorphism: a possible mechanism maintaining HLA polymorphism. Viral Immunol 1998; 11:93-102. [PMID: 9765031 DOI: 10.1089/vim.1998.11.93] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The influence of single amino acid substitutions within a rubella E1 protein T-cell epitope, E1(273-284) on T-cell recognition was studied. Substitutions of an uncharged amino acid A for an E or for a T and substitution of a T for S were found to not significantly reduce the T-cell responses. However, substitution of a charged residue such as E for hydrophobic residues (I, V, or W); D for Q; or a relatively larger size amino acid for polar residues completely abolished the cytotoxicities mediated by E1(273-284)-specific T-cell clone. A set of single amino acid-substituted peptide analogs of E1(273-284) not eliciting cytotoxicity of the T-cell clone was used to test the influence of point mutation of the epitope on HLA DR restrictions. A panel of B-cell lines with different DR4 subtypes was used as targets in cytotoxicity assays to determine the restrictive HLA molecules. Results showed that modification of the T-cell epitope by point mutation could reverse the HLA DR restriction from one allele to other alleles. A model based on these results has been proposed to explain the mechanism balancing major histocompatibility complex (MHC) polymorphism in outbred populations.
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Affiliation(s)
- D Ou
- Department of Paediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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Abstract
In this analysis, we introduce a new categorization of HLA DR alleles which are important members of HLA class II genes encoding cell surface glycoproteins that function to present antigenic peptides to T cells. We have grouped all HLA DR molecules into seven different functional categories on the basis of their ability to bind and present antigenic peptides to T cells and their association with susceptibility or resistance to disease. This novel categorization of DR alleles on the basis of function allows for the prediction of seven similar subregion structures (supertypes or supermotifs) within pocket 4 of HLA DR peptide binding groove as the molecular basis for grouping these alleles. The physicochemical characteristics of HLA DR supertype residues, charge in particular, may influence the selectivity for binding peptide, dominate promiscuous T-cell recognition of antigenic peptides, and affect HLA DR disease associations. To rationalize the functional categories of DR alleles, we have further combined the seven DR supertype patterns into three groups based on the charges of residues within the supertypes. Grouping HLA DR alleles into functional categories may assist in understanding the mechanistic basis of autoimmunity, resolving current paradoxes in HLA disease associations, and developing new immunotherapy strategies.
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Affiliation(s)
- D Ou
- Department of Paediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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Anderson KM, Seed T, Alrefai W, Ou D, Harris JE. NTBN, a free radical spin trap induces programmed cell death in human pancreatic cancer (PANC-1) cells. Anticancer Res 1998; 18:3213-22. [PMID: 9858885] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
N-tertiary butyl-a-phenylnitrone, a free radical spin trap at > or = 10 mM concentration, inhibited proliferation and reduced the viability of human pancreatic cancer (Panc-1) cells. The drug concentration determined the extent of inhibition, and with continued culture a proportion of the cells detached, most of which stained with trypan blue. Although hypodiploid cells were detected by flow cytometry of cells cultured with 20 mM NTBN, DNA laddering was absent and the TUNEL reaction negative. "Dark" cells present in samples cultured with 10 mM NTBN exhibited decreased cytoplasmic volume and increased staining with methylene blue and azure II, but lacked characteristic nuclear changes of type 1 programmed cell death. Cells cultured with > 10 mM of the spin trap exhibited nuclear and cytoplasmic changes more consistent with a non-type 1, type 2 variant of PCD with extensive cytoplasmic vacuolization. Careful analysis revealed evidence of marked pinocytosis in some cells. In view of the spin-trap associated pinocytosis, augmented uptake of chemotherapy in affected cells might be anticipated, but additive, synergistic or antagonistic interactions between NTBN and 5-fluorouracil were not observed.
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Affiliation(s)
- K M Anderson
- Department of Medicine, Rush Medical College, Chicago, Il. 60612, USA.
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Ueda H, Ou D, Endo T, Nagase H, Tomono K, Nagai T. Evaluation of a sulfobutyl ether beta-cyclodextrin as a solubilizing/stabilizing agent for several drugs. Drug Dev Ind Pharm 1998; 24:863-7. [PMID: 9876538 DOI: 10.3109/03639049809088532] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [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: 11/13/2022]
Abstract
To evaluate the potential use of beta-cyclodextrin sulfobutyl ether, 7 sodium salt (SBE7-beta-CD) as a drug solubilizing and stabilizing agent, the solubilizing effects of SBE7-beta-CD on 22 different poorly water-soluble drugs were compared with those of intact beta-CD and heptakis-(2,6-di-O-methyl)-beta-CD (DMCD). SBE7-beta-CD was generally a more effective solubilizer for poorly water-soluble drugs than was intact beta-CD, but SBE7-beta-CD was not as effective as DMCD. The effects of SBE7-beta-CD on the acid hydrolysis rate of prostaglandin I2, the alkaline hydrolysis rate of indomethacin, the dehydration of prostaglandin E1, and the isomerization of prostaglandin A1 were also investigated and compared to those for intact beta-CD, DMCD, and 2,3,6 partially methylated-beta-CD (PMCD). The stabilizing effects of SBE7-beta-CD on chemically unstable drugs were generally higher than those of other CDs.
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Affiliation(s)
- H Ueda
- Department of Physical Chemistry, Hoshi University, Tokyo, Japan
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Shen G, Feng Z, Huang J, Xu G, Lou X, Ou D. [The development of SH-C1 autobiochemical analyzer]. Zhongguo Yi Liao Qi Xie Za Zhi 1998; 22:125-128. [PMID: 12016778] [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: 05/23/2023]
Abstract
As a miniature automatic analyzer, SH-C1 analyzer can be divided into five parts: the diluter, the circular reaction plate, the photometer, the electronic control board and the main microcomputer system with CRT monitor. The paper discusses its general structure and its key parts: the double-beam high precision photometer and the diluter controlled by microprocessors. The paper also describes the software system and the properties of the instrument.
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Affiliation(s)
- G Shen
- Zhejiang University (310027)
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Ou D, Mitchell LA, Décarie D, Tingle AJ, Nepom GT. Promiscuous T-cell recognition of a rubella capsid protein epitope restricted by DRB1*0403 and DRB1*0901 molecules sharing an HLA DR supertype. Hum Immunol 1998; 59:149-57. [PMID: 9548074 DOI: 10.1016/s0198-8859(98)00006-8] [Citation(s) in RCA: 13] [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: 02/07/2023]
Abstract
Two T cell clones derived from different donors with HLA-DRB1*0403 or DRB1*0901 phenotype recognize a rubella capsid peptide, C(265-273) in the context of several different HLA-DR molecules in addition to DRB1*0403 and DRB1*0901. All DR molecules restricting the T-cell clones have in common residues, R or Q at position beta 70, R at position beta 71, and E at position beta 74 in pocket '4' of the DR peptide binding groove, suggesting that a DR subregion structure or supertype, "Q/RRE" underlies the promiscuous T-cell recognition of this peptide. Single amino acid substituted analogs of peptide C(263-275) at anchor position 4 for natural residue R were tested for their ability to induce clonal T-cell cytotoxic responses. The results indicated that a positively charged residue, R or K, was required for T-cell recognition, suggesting a possible mechanism of electrostatic interactions between the negatively charged residue E at position beta 74 of these DR molecules and the positively charged residue at anchor position 4 of the peptide in T-cell recognition.
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Affiliation(s)
- D Ou
- Department of Paediatrics, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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