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Hagan ML, Mander S, Joseph C, Mcgrath M, Barrett A, Lewis A, Hill WD, Browning D, Mcgee-Lawrence ME, Cai H, Liu K, Barrett JT, Gewirtz DA, Thangaraju M, Schoenlein PV. Upregulation of the EGFR/MEK1/MAPK1/2 signaling axis as a mechanism of resistance to antiestrogen‑induced BimEL dependent apoptosis in ER + breast cancer cells. Int J Oncol 2022; 62:20. [PMID: 36524361 PMCID: PMC9854236 DOI: 10.3892/ijo.2022.5468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 11/18/2022] [Indexed: 12/23/2022] Open
Abstract
The epidermal growth factor receptor (EGFR) is commonly upregulated in multiple cancer types, including breast cancer. In the present study, evidence is provided in support of the premise that upregulation of the EGFR/MEK1/MAPK1/2 signaling axis during antiestrogen treatment facilitates the escape of breast cancer cells from BimEL‑dependent apoptosis, conferring resistance to therapy. This conclusion is based on the findings that ectopic BimEL cDNA overexpression and confocal imaging studies confirm the pro‑apoptotic role of BimEL in ERα expressing breast cancer cells and that upregulated EGFR/MEK1/MAPK1/2 signaling blocks BimEL pro‑apoptotic action in an antiestrogen‑resistant breast cancer cell model. In addition, the present study identified a pro‑survival role for autophagy in antiestrogen resistance while EGFR inhibitor studies demonstrated that a significant percentage of antiestrogen‑resistant breast cancer cells survive EGFR targeting by pro‑survival autophagy. These pre‑clinical studies establish the possibility that targeting both the MEK1/MAPK1/2 signaling axis and pro‑survival autophagy may be required to eradicate breast cancer cell survival and prevent the development of antiestrogen resistance following hormone treatments. The present study uniquely identified EGFR upregulation as one of the mechanisms breast cancer cells utilize to evade the cytotoxic effects of antiestrogens mediated through BimEL‑dependent apoptosis.
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Affiliation(s)
- Mackenzie L. Hagan
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA
| | - Suchreet Mander
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA
| | - Carol Joseph
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA
| | - Michael Mcgrath
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA
| | - Amanda Barrett
- Department of Pathology, Augusta University, Augusta, GA 30912, USA,Department of Medical College of Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
| | - Allison Lewis
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA
| | - William D. Hill
- Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Darren Browning
- Department of Medical College of Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA,Department of Biochemistry, Augusta University, Augusta, GA 30912, USA
| | | | - Haifeng Cai
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA,Department of Surgical Oncology, Tangshan People's Hospital, Tangshan, Hebei 063000, P.R. China
| | - Kebin Liu
- Department of Medical College of Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA,Department of Biochemistry, Augusta University, Augusta, GA 30912, USA
| | - John T. Barrett
- Department of Medical College of Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA,Department of Radiation Oncology, Augusta University, Augusta, GA 30912, USA
| | - David A. Gewirtz
- Department of Pharmacology and Toxicology, Massey Cancer Center, Richmond, VA 23298, USA
| | - Muthusamy Thangaraju
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA,Department of Medical College of Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA
| | - Patricia V. Schoenlein
- Department of Cellular Biology and Anatomy, Augusta University, Augusta, GA 30912, USA,Department of Medical College of Georgia Cancer Center, Augusta University, Augusta, GA 30912, USA,Correspondence to: Dr Patricia V. Schoenlein, Department of Cellular Biology and Anatomy, Augusta University, Research and Education Building Room 2912, 1120 15th Street, Augusta, GA 30912, USA, E-mail:
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2
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Youn HJ, Han W. A Review of the Epidemiology of Breast Cancer in Asia: Focus on Risk Factors. Asian Pac J Cancer Prev 2020; 21:867-880. [PMID: 32334446 PMCID: PMC7445974 DOI: 10.31557/apjcp.2020.21.4.867] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Indexed: 01/11/2023] Open
Abstract
Background and Aim: Breast cancer is the most prevalent cancer in women. To date, regional differences in breast cancer risk factors have not been identified. The aim of our review was to gain a better understanding of the role of risk factors in women with breast cancer in Asia. Methods: We conducted a PubMed search on 15 March 2016, for journal articles published in English between 2011 and 2016, which reported data for human subjects in Asia with a diagnosis of breast cancer. Search terms included breast neoplasm, epidemiology, Asia, prevalence, incidence, risk and cost of illness. Studies of any design were included, except for review articles and meta-analyses, which were excluded to avoid duplication of data. No exclusions were made based on breast cancer treatment. We reported the results using the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guidelines. Results: A total of 776 abstracts were retrieved. After screening against the eligibility criteria, 562 abstracts were excluded. The remaining 214 abstracts, which were published between 2013 and 2015, were included in this review. Results were summarized and reported under three categories: incidence, prevalence or outcomes for breast cancer in Asia; modifiable risk factors; and non-modifiable risk factors. We found that the increased risk of breast cancer among participants from Asia was associated with older age, family history of breast cancer, early menarche, late menopause, high body mass index, being obese or overweight, exposure to tobacco smoke, and high dietary intake of fats or fatty foods. In contrast, intake of dietary fruits, vegetables, and plant- and soy-based products was associated with a decreased breast cancer risk. While based on limited data, when compared to women from the United States, women from Asia had a decreased risk of breast cancer. Conclusions: This review of 214 abstracts of studies in Asia, published between 2013 and 2015, confirmed the relevance of known non-modifiable and modifiable risk factors for women with breast cancer.
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Affiliation(s)
- Hyun Jo Youn
- Department of Surgery, Research Institute of Clinical Medicine, Chonbuk National University and Biomedical Research Institute, Chonbuk National University Hospital, Republic of Korea
| | - Wonshik Han
- Department of Surgery and Cancer Research Institute, Seoul National University College of Medicine, Seoul National University Cancer Hospital, Republic of Korea
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3
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Avazpour N, Hajjari M, Kazemi Nezhad SR, Tahmasebi Birgani M. SNHG1 Long Noncoding RNA is Potentially Up-Regulated in Colorectal Adenocarcinoma. Asian Pac J Cancer Prev 2020; 21:897-901. [PMID: 32334448 DOI: 10.31557/apjcp.2020.21.4.897] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Indexed: 01/13/2023] Open
Abstract
Colorectal cancer (CRC) is one of the most common types of cancer worldwide. However, the molecular mechanisms involved in CRC initiation and progression is remained to be unknown. It seems that lncRNAs, as the main and lengthy functional transcripts of the genome, have important roles in different cancers such as CRC. CRC-related lncRNAs are reported to be involved in diverse molecular processes such as metastasis, invasion, cell proliferation, and apoptosis. This study was aimed to analyse the expression level of lncRNA SNHG1 in colorectal adenocarcinoma and normal tissues. We performed an in silico analysis on a large cohort and confirmed the results by experimental analysis of clinical samples through real-time PCR. Our findings demonstrated that that SNHG1 is potentially overexpressed in tumor tissues compared with adjacent normal tissues. The expression level of SNHG1 was shown to be potentially associated with clinicopathological features of tumors. The current study suggests the potential role of SNHG1 in colon cancer progression.
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Affiliation(s)
- Niloofar Avazpour
- Department of Genetics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Mohamadreza Hajjari
- Department of Genetics, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | | | - Maryam Tahmasebi Birgani
- Department of Medical Genetics, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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4
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Ito Y, Umezu T, Tadokoro K, Saito Y, Katagiri S, Suguro T, Asano M, Yoshizawa S, Akahane D, Tanaka Y, Fujimoto H, Okabe S, Gotoh M, Tauchi T, Kawana C, Ohyashiki JH, Nakamura N, Ohyashiki K. BIM deletion polymorphism accounts for lack of favorable outcome in Japanese females with follicular lymphoma. Leuk Lymphoma 2018; 60:1283-1288. [DOI: 10.1080/10428194.2018.1529310] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yoshikazu Ito
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Tomohiro Umezu
- Institute of Medical Science, Tokyo Medical University, Shinjuku-ku, Japan
| | | | - Yuu Saito
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | | | - Tamiko Suguro
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Michiyo Asano
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | | | - Daigo Akahane
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Yuko Tanaka
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Hiroaki Fujimoto
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Seiichi Okabe
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Moritaka Gotoh
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Tetsuzo Tauchi
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
| | - Chiaki Kawana
- Institute of Medical Science, Tokyo Medical University, Shinjuku-ku, Japan
| | - Junko H. Ohyashiki
- Institute of Medical Science, Tokyo Medical University, Shinjuku-ku, Japan
| | - Naoya Nakamura
- Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan
| | - Kazuma Ohyashiki
- Department of Hematology, Tokyo Medical University, Tokyo, Japan
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5
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Kim EK, Cho J, Kim JY, Chang SA, Park SJ, Choi JO, Lee SC, Ahn JS, Park SW, Im YH, Jeon ES, Park YH. Early Decline in Left Ventricular Ejection Fraction Can Predict Trastuzumab-Related Cardiotoxicity in Patients with Breast Cancer: A Study Using 13 Years of Registry Data. Cancer Res Treat 2018; 51:727-736. [PMID: 30177584 PMCID: PMC6473274 DOI: 10.4143/crt.2018.262] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 09/03/2018] [Indexed: 12/16/2022] Open
Abstract
Purpose While concerns regarding trastuzumab-related cardiac dysfunction (TRCD) in patients with breast cancer are increasing, there is a lack of evidence supporting the current recommendations for TRCD monitoring. We aimed to investigate the clinical predictors of TRCD in the adjuvant setting of human epidermal growth factor receptor 2–positive breast cancer patients. Materials and Methods From August 2003 to April 2016, consecutive 998 patients who were treated with adjuvant trastuzumab for breast cancer were retrospectively evaluated. TRCD was defined as a decrease ≥10% in left ventricular ejection fraction (LVEF), with a decline below the normal limit or symptomatic heart failure. Results Among 787 eligible patients who had complete data sets consisting of both baseline and follow-up assessment of left ventricular systolic function by echocardiography (mean age, 49.9±9.5 years), 58 (7.4%) developed TRCD. TRCD patients had lower baseline LVEF (63% [59–66] vs. 65% [61–68], p=0.016) and more frequently administered Adriamycin (98% vs. 89%, p=0.022) than those without TRCD. On follow-up echocardiography, a drop in LVEF ≥5% within the first 3 months was more frequent in TRCD patients (78.3% vs. 38.4%, p<0.001). Regardless of baseline LVEF and Adriamycin treatment, a drop in LVEF ≥5% within the first 3 months of trastuzumab administration was strongly associated with the development of TRCD (adjusted hazard ratio, 45.1[17.0–127.6], p<0.001). Conclusion The overall incidence of TRCD was 7.4% in Asian breast cancer patients treated with adjuvant trastuzumab. A decline in LVEF ≥5% within the first 3 months of trastuzumab initiation was strongly associated with TRCD development in patients with breast cancer.
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Affiliation(s)
- Eun Kyoung Kim
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jinhyun Cho
- Division of Hematology-Oncology, Department of Medicine, Inha University Hospital, Inha University School of Medicine, Incheon, Korea
| | - Ji-Yeon Kim
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung-A Chang
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung-Ji Park
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jin Oh Choi
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sang Chol Lee
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Jin Seok Ahn
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Seung Woo Park
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Young-Hyuck Im
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Eun Seok Jeon
- Division of Cardiology, Heart Vascular Stroke Institute, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Yeon Hee Park
- Division of Hematology-Oncology, Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
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6
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Flister MJ, Bergom C. Genetic Modifiers of the Breast Tumor Microenvironment. Trends Cancer 2018; 4:429-444. [PMID: 29860987 DOI: 10.1016/j.trecan.2018.04.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 04/13/2018] [Accepted: 04/16/2018] [Indexed: 02/06/2023]
Abstract
Multiple nonmalignant cell types in the tumor microenvironment (TME) impact breast cancer risk, metastasis, and response to therapy, yet most heritable mechanisms that influence TME cell function and breast cancer outcomes are largely unknown. Breast cancer risk is ∼30% heritable and >170 genetic loci have been associated with breast cancer traits. However, the majority of candidate genes have poorly defined mechanistic roles in breast cancer biology. Research indicates that breast cancer risk modifiers directly impact cancer cells, yet it is equally plausible that some modifier alleles impact the nonmalignant TME. The objective of this review is to examine the list of current breast cancer candidate genes that may modify breast cancer risk and outcome through the TME.
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Affiliation(s)
- Michael J Flister
- Genomic Sciences and Precision Medicine Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA; Cancer Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA; Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Carmen Bergom
- Cancer Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA; Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
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7
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Maimaiti Y, Dong L, Aili A, Maimaitiaili M, Huang T, Abudureyimu K. Bim may be a poor prognostic biomarker in breast cancer patients especially in those with luminal A tumors. Cancer Biomark 2018; 19:411-418. [PMID: 28582840 DOI: 10.3233/cbm-160377] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Bcl-2 interacting mediator of cell death (Bim) appears to have contradictory roles in cancer. It is uncertain whether Bim show prognostic significance in patients with breast cancer. OBJECTIVE To investigate the correlation between Bim expression and clinicopathological characteristics of breast cancer and to evaluate Bim's effect on overall survival (OS). METHODS We used immunohistochemistry (IHC) technique to detect the expression of Bim via tissue microarray in 275 breast cancer samples, Kaplan-Meier analysis to perform survival analysis, and Cox proportional hazards regression model to explore the risk factors of breast cancer. RESULTS The results revealed that Bim expression was significantly correlated with age, estrogen receptor (ER) and/or progesterone receptor (PR), human epidermal growth factor receptor (HER2) and Ki67 expression (P< 0.05). Bim expression was significantly different in the four molecular subtypes (P= 0.000). Survival analysis showed that Bim positive expression contributed to a shorter OS (P= 0.034), especially in patients with luminal A tumors (P= 0.039). Univariate and multivariate regression analysis showed that Bim was an independent prognostic factor for breast cancer (P< 0.05). CONCLUSION Bim may serve as an effective predictive factor for lower OS in breast cancer patients, especially in those with luminal A tumors.
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Affiliation(s)
- Yusufu Maimaiti
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China.,Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Lingling Dong
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.,Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Aikebaier Aili
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Maimaitiaili Maimaitiaili
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
| | - Tao Huang
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Kelimu Abudureyimu
- Department of General Surgery, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, Xinjiang, China
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8
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Gómez-Flores-Ramos L, Álvarez-Gómez RM, Villarreal-Garza C, Wegman-Ostrosky T, Mohar A. Breast cancer genetics in young women: What do we know? MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2017; 774:33-45. [PMID: 29173497 DOI: 10.1016/j.mrrev.2017.08.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 04/21/2017] [Accepted: 08/17/2017] [Indexed: 12/12/2022]
Abstract
Breast cancer (BC) in young women, generally defined in oncology as women who are 40 years of age or younger, represents 2 out of 10 BC cases in developing countries. Several research studies, including genetic cancer panel tests, genome-wide association studies, expression analyses and polymorphisms reports, have found that young women with BC exhibit a higher genetic susceptibility and specific genomic signature compared to postmenopausal women with BC. Thus, international guidelines recommend genetic counseling for this age population. This review presents the current state of the art of genetics and genomics with regards to young women with BC.
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Affiliation(s)
- Liliana Gómez-Flores-Ramos
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Circuito Mario de la Cueva, Coyoacán, Ciudad Universitaria, C.P. 04510, Mexico City, Mexico; Unidad de Investigación en Epidemiología, Subdivisión de Investigación Básica, Instituto Nacional de Cancerología, Av. San Fernando # 22, Col. Sección XVI, Delegación Tlalpan, C.P. 14080, Mexico City, Mexico
| | - Rosa María Álvarez-Gómez
- Clínica de Cáncer Hereditario, Subdivisión de Investigación Básica, Instituto Nacional de Cancerlogía, Av. San Fernando # 22, Col. Sección XVI, Delegación Tlalpan, C.P. 14080, Mexico City, Mexico
| | - Cynthia Villarreal-Garza
- Clínica de Cáncer Hereditario, Subdivisión de Investigación Básica, Instituto Nacional de Cancerlogía, Av. San Fernando # 22, Col. Sección XVI, Delegación Tlalpan, C.P. 14080, Mexico City, Mexico; Centro de Cáncer de Mama, Tecnológico de Monterrey, Centro Médico Zambrano Hellion, 6° Piso Av. Batallón de San Patricio #112 Col. Real San Agustín, San Pedro Garza García C.P. 66278, Nuevo León, Mexico
| | - Talia Wegman-Ostrosky
- Clínica de Cáncer Hereditario, Subdivisión de Investigación Básica, Instituto Nacional de Cancerlogía, Av. San Fernando # 22, Col. Sección XVI, Delegación Tlalpan, C.P. 14080, Mexico City, Mexico
| | - Alejandro Mohar
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Circuito Mario de la Cueva, Coyoacán, Ciudad Universitaria, C.P. 04510, Mexico City, Mexico; Unidad de Investigación en Epidemiología, Subdivisión de Investigación Básica, Instituto Nacional de Cancerología, Av. San Fernando # 22, Col. Sección XVI, Delegación Tlalpan, C.P. 14080, Mexico City, Mexico.
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9
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Wang YM, Zhang GY, Wang Y, Hu M, Zhou JJ, Sawyer A, Cao Q, Wang Y, Zheng G, Lee VWS, Harris DCH, Alexander SI. Exacerbation of spontaneous autoimmune nephritis following regulatory T cell depletion in B cell lymphoma 2-interacting mediator knock-out mice. Clin Exp Immunol 2017; 188:195-207. [PMID: 28152566 PMCID: PMC5383436 DOI: 10.1111/cei.12937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2017] [Indexed: 02/02/2023] Open
Abstract
Regulatory T cells (Tregs ) have been recognized as central mediators for maintaining peripheral tolerance and limiting autoimmune diseases. The loss of Tregs or their function has been associated with exacerbation of autoimmune disease. However, the temporary loss of Tregs in the chronic spontaneous disease model has not been investigated. In this study, we evaluated the role of Tregs in a novel chronic spontaneous glomerulonephritis model of B cell lymphoma 2-interacting mediator (Bim) knock-out mice by transient depleting Tregs . Bim is a pro-apoptotic member of the B cell lymphoma 2 (Bcl-2) family. Bim knock-out (Bim-/- ) mice fail to delete autoreactive T cells in thymus, leading to chronic spontaneous autoimmune kidney disease. We found that Treg depletion in Bim-/- mice exacerbated the kidney injury with increased proteinuria, impaired kidney function, weight loss and greater histological injury compared with wild-type mice. There was a significant increase in interstitial infiltrate of inflammatory cells, antibody deposition and tubular damage. Furthermore, the serum levels of cytokines interleukin (IL)-2, IL-4, IL-6, IL-10, IL-17α, interferon (IFN)-γ and tumour necrosis factor (TNF)-α were increased significantly after Treg depletion in Bim-/- mice. This study demonstrates that transient depletion of Tregs leads to enhanced self-reactive T effector cell function followed by exacerbation of kidney disease in the chronic spontaneous kidney disease model of Bim-deficient mice.
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Affiliation(s)
- Y. M. Wang
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - G. Y. Zhang
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - Y. Wang
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - M. Hu
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - J. J. Zhou
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - A. Sawyer
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
| | - Q. Cao
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - Y. Wang
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - G. Zheng
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - V. W. S. Lee
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - D. C. H. Harris
- Centre for Transplantation and Renal ResearchUniversity of Sydney at Westmead Millennium InstituteWestmeadNSWAustralia
| | - S. I. Alexander
- Centre for Kidney ResearchThe Children's Hospital at WestmeadWestmeadNSWAustralia
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