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Lima de Andrade RD, Palomino GJQ, de Queiroz ISM, Bezerra da Silva AF, Ferreira ACA, Alves BG, de Morais SM, Rodrigues APR, de Lima LF, de Figueiredo JR. Ultra-diluted/dynamized doxorubicin reduces the toxicity caused by doxorubicin during the in vitro culture of pig preantral follicles enclosed in ovarian tissue. Reprod Toxicol 2024; 129:108683. [PMID: 39121978 DOI: 10.1016/j.reprotox.2024.108683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 08/02/2024] [Accepted: 08/06/2024] [Indexed: 08/12/2024]
Abstract
The present study investigated the effect of adding allopathic doxorubicin (DOX 0.3 µg/mL), the vehicle of ultradiluted/dynamized doxorubicin (0.2 % ethanol), different dynamizations of ultradiluted/dynamized doxorubicin (DOX 6CH, DOX 12CH and DOX 30CH), both in the absence or presence of chemical stress induced by doxorubicin at 0.3 µg/mL on follicular survival and activation, antioxidant capacity of the medium, Catalase activity (CAT), production of reactive protein thiol, maintenance of type I and III collagen fibers and accumulation of lipofuscin in porcine ovarian tissue cultured in vitro for 48 hours. To do this, part of the ovarian tissue fragments was fixed for the uncultured control and the rest were cultured in: MEM (cultured control), DOX 0.3 µg/mL, Ethanol, DOX 6CH, DOX 12CH, DOX 30CH, DOX (0.3 µg/mL) + DOX 6CH, DOX (0.3 µg/mL) + DOX 12CH, DOX (0.3 µg/mL) + DOX 30CH treatments. The results showed that, in general, ultradiluted/dynamized doxorubicin (DOX 6CH, DOX 12CH and DOX 30CH) mitigated the toxic effect of allopathic doxorubicin (0.3 µg/mL) on the morphology of preantral follicles, the content of type I and III collagen fibers, and the production of lipofuscin in the tissue. However, only DOX (0.3 µg/mL) + DOX 6CH attenuated the oxidative stress induced by DOX (0.3 µg/mL), maintaining adequate CAT activity that was similar to the uncultured control. Additionally, when the three isolated ultradiluted/dynamized doxorubicin were considered, only DOX 12CH increased the reduced thiol levels compared to the uncultured control and MEM. In conclusion, supplementing the culture medium with ultradiluted/dynamized DOX (DOX 6CH, DOX 12CH and DOX 30CH) attenuated the toxicity induced by allopathic doxorubicin during the in vitro culture of pig preantral follicles enclosed in ovarian tissue.
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Affiliation(s)
- Ramyres Diego Lima de Andrade
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Gaby Judith Quispe Palomino
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | | | - Ana Flávia Bezerra da Silva
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Anna Clara Accioly Ferreira
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | | | - Selene Maia de Morais
- Laboratory of Chemistry and Natural Products, State University of Ceara, Fortaleza, CE, Brazil
| | - Ana Paula Ribeiro Rodrigues
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - Laritza Ferreira de Lima
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil
| | - José Ricardo de Figueiredo
- Laboratory of Manipulation of Oocytes and Preantral Follicles (LAMOFOPA), State University of Ceará, Fortaleza, CE, Brazil.
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Baki KB, Sapmaz T, Sevgin K, Topkaraoglu S, Erdem E, Tekayev M, Guler EM, Beyaztas H, Bozali K, Aktas S, Irkorucu O, Sapmaz E. Curcumin and gallic acid have a synergistic protective effect against ovarian surface epithelium and follicle reserve damage caused by autologous intraperitoneal ovary transplantation in rats. Pathol Res Pract 2024; 258:155320. [PMID: 38728794 DOI: 10.1016/j.prp.2024.155320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 03/07/2024] [Accepted: 04/17/2024] [Indexed: 05/12/2024]
Abstract
The objective of this study to examine the effects of curcumin and gallic acid use against oxidative stress damage in the autologous intraperitoneal ovarian transplantation model created in rats on ovarian follicle reserve, ovarian surface epithelium, and oxidant-antioxidant systems. 42 adult female Sprague Dawley rats (n=7) were allocated into 6 groups. Group 1 served as the control. In Group 2, rats underwent ovarian transplantation (TR) to their peritoneal walls. Group 3 received corn oil (CO) (0.5 ml/day) one day before and 14 days after transplantation. Group 4 was administered curcumin (CUR) (100 mg/kg/day), Group 5 received gallic acid (GA) (20 mg/kg/day), and Group 6 was treated with a combination of curcumin and gallic acid via oral gavage after transplantation. Rats were sacrificed on the 14th postoperative day, and blood along with ovaries were collected for analysis. The removed ovaries were analyzed at light microscopic, fluorescence microscopic, and biochemical levels. In Group 2 and Group 3, while serum and tissue Total Oxidant Levels (TOS) and Oxidative Stress Index (OSI) increased, serum Total Antioxidant Levels (TAS) decreased statistically significantly (p˂0.05) compared to the other groups (Groups 1, 4, 5, and 6). The ovarian follicle reserve was preserved and the changes in the ovarian surface epithelium and histopathological findings were reduced in the antioxidant-treated groups (Groups 4, 5, and 6). In addition, immunofluorescence examination revealed that the expression of Cytochrome C and Caspase 3 was stronger and Ki-67 was weaker in Groups 2 and 3, in comparison to the groups that were given antioxidants. It can be said that curcumin and gallic acid have a histological and biochemical protective effect against ischemia-reperfusion injury due to ovarian transplantation, and this effect is stronger when these two antioxidants are applied together compared to individual use.
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Affiliation(s)
- Kubra Basol Baki
- University of Health Sciences, Hamidiye Institute of Health Sciences, Department of Histology and Embryology, Istanbul 34668, Türkiye; Bezmialem Vakif University, Medical Faculty, Department of Histology and Embryology, Istanbul, Türkiye
| | - Tansel Sapmaz
- University of Health Sciences, Hamidiye Faculty of Medicine, Department of Histology and Embryology, Istanbul 34668, Türkiye.
| | - Kubra Sevgin
- University of Health Sciences, International Faculty of Medicine, Department of Histology and Embryology, Istanbul 34668, Türkiye
| | - Sude Topkaraoglu
- University of Health Sciences, Hamidiye Institute of Health Sciences, Department of Histology and Embryology, Istanbul 34668, Türkiye; University of Health Sciences, Hamidiye Faculty of Medicine, Department of Histology and Embryology, Istanbul 34668, Türkiye
| | - Esra Erdem
- University of Health Sciences, Vocational School of Health Services, Department of Medical Services and Techniques, Pathology Laboratory Techniques Program, Istanbul 34668, Türkiye
| | - Muhammetnur Tekayev
- University of Health Sciences, Hamidiye Institute of Health Sciences, Department of Histology and Embryology, Istanbul 34668, Türkiye
| | - Eray Metin Guler
- University of Health Sciences, Hamidiye Faculty of Medicine, Haydarpasa Numune Health Application and Research Center, Department of Medical Biochemistry, Istanbul, Türkiye; University of Health Sciences, Hamidiye Faculty of Medicine, Department of Medical Biochemistry, Istanbul, Türkiye
| | - Hakan Beyaztas
- University of Health Sciences, Hamidiye Faculty of Medicine, Department of Medical Biochemistry, Istanbul, Türkiye
| | - Kubra Bozali
- University of Health Sciences, Hamidiye Faculty of Medicine, Department of Medical Biochemistry, Istanbul, Türkiye
| | - Selman Aktas
- University of Health Sciences, Hamidiye Faculty of Medicine, Department of Biostatistics and Medical Informatics, Istanbul, Türkiye
| | - Oktay Irkorucu
- University of Sharjah, College of Medicine, Department of Clinical Sciences, Sharjah, United Arab Emirates
| | - Ekrem Sapmaz
- University of Health Sciences, Adana City Training and Research Hospital, Department of Gynecology and Obstetrics, Adana, Türkiye
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Chen H, Zhang G, Peng Y, Wu Y, Han X, Xie L, Xu H, Chen G, Liu B, Xu T, Pang M, Hu C, Fan H, Bi Y, Hua Y, Zhou Y, Luo S. Danggui Shaoyao San protects cyclophosphamide-induced premature ovarian failure by inhibiting apoptosis and oxidative stress through the regulation of the SIRT1/p53 signaling pathway. JOURNAL OF ETHNOPHARMACOLOGY 2024; 323:117718. [PMID: 38181933 DOI: 10.1016/j.jep.2024.117718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/28/2023] [Accepted: 01/03/2024] [Indexed: 01/07/2024]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE It has been reported that apoptosis and oxidative stress are related to cyclophosphamide (CYC)-induced premature ovarian failure (POF). Therefore, anti-apoptotic and anti-oxidative stress treatments exhibit therapeutic efficacy in CYC-induced POF. Danggui Shaoyao San (DSS), which has been extensively used to treat gynecologic diseases, is found to inhibit apoptosis and reduce oxidative stress. However, the roles of DSS in regulating apoptosis and oxidative stress during CYC-induced POF, and its associated mechanisms are still unknown. AIM OF THE STUDY This work aimed to investigate the roles and mechanisms of DSS in inhibiting apoptosis and oxidative stress in CYC-induced POF. MATERIALS AND METHODS CYC (75 mg/kg) was intraperitoneally injected in mice to construct the POF mouse model for in vivo study. Thereafter, alterations of body weight, ovary morphology and estrous cycle were monitored to assess the ovarian protective properties of DSS. Serum LH and E2 levels were analyzed by enzyme-linked immunosorbent assay (ELISA). Hematoxylin-eosin (HE) staining was employed for examining ovarian pathological morphology and quantifying follicles in various stages. Meanwhile, TUNEL staining and apoptosis-related proteins were adopted for evaluating apoptosis. Oxidative stress was measured by the levels of ROS, MDA, and 4-HNE. Western blot (WB) assay was performed to detect proteins related to the SIRT1/p53 pathway. KGN cells were used for in vitro experiment. TBHP stimulation was carried out for establishing the oxidative stress-induced apoptosis cell model. Furthermore, MTT assay was employed for evaluating the protection of DSS from TBHP-induced oxidative stress. The anti-apoptotic ability of DSS was evaluated by hoechst/PI staining, JC-1 staining, and apoptosis-related proteins. Additionally, the anti-oxidative stress ability of DSS was measured by detecting the levels of ROS, MDA, and 4-HNE. Proteins related to SIRT1/p53 signaling pathway were also measured using WB and immunofluorescence (IF) staining. Besides, SIRT1 expression was suppressed by EX527 to further investigate the role of SIRT1 in the effects of DSS against apoptosis and oxidative stress. RESULTS In the in vivo experiment, DSS dose-dependently exerted its anti-apoptotic, anti-oxidative stress, and ovarian protective effects. In addition, apoptosis, apoptosis-related protein and oxidative stress levels were inhibited by DSS treatment. DSS treatment up-regulated SIRT1 and down-regulated p53 expression. From in vitro experiment, it was found that DSS treatment protected KGN cells from TBHP-induced oxidative stress injury. Besides, DSS administration suppressed the apoptosis ratio, apoptosis-related protein levels, mitochondrial membrane potential damage, and oxidative stress. SIRT1 suppression by EX527 abolished the anti-apoptotic, anti-oxidative stress, and ovarian protective effects, as discovered from in vivo and in vitro experiments. CONCLUSIONS DSS exerts the anti-apoptotic, anti-oxidative stress, and ovarian protective effects in POF mice, and suppresses the apoptosis and oxidative stress of KGN cells through activating SIRT1 and suppressing p53 pathway.
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Affiliation(s)
- Hongmei Chen
- The First School of Clinical Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510405, China
| | - Guoyong Zhang
- Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Yan Peng
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Yuting Wu
- Binzhou Medical University Hospital, Binzhou, 256603, China
| | - Xin Han
- Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Lingpeng Xie
- Department of Hepatology, Cancer Center, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510315, China
| | - Honglin Xu
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China; The Tenth Affiliated Hospital of Southern Medical University (Dongguan People's Hospital), Dongguan, 523058, China
| | - Guanghong Chen
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China; The First Affiliated Hospital of Guangzhou University of Chinese Medicine/Post- Doctoral Research Station, Guangzhou, 510405, China; Guangdong Clinical Research Academy of Chinese Medicine, Guangzhou, 510405, China
| | - Bin Liu
- Department of Traditional Chinese Medicine, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, 510260, China
| | - Tong Xu
- Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Mingjie Pang
- Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Changlei Hu
- Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China
| | - Huijie Fan
- Department of Traditional Chinese Medicine, Yangjiang People's Hospital, Yangjiang, 529599, China
| | - Yiming Bi
- Department of Acupuncture and Moxibustion, The Affliated TCM Hospital of Guangzhou Medical University, Guangzhou, 510130, China
| | - Yue Hua
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Yingchun Zhou
- Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China; School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, 510515, China.
| | - Songping Luo
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510405, China.
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Menezes VG, Monte APOD, de Sousa Barberino R, Gouveia BB, Lins TLBG, Macedo TJSE, Júnior JLDO, de Almeida Araújo C, Campos FS, Filho EFDO, Batista AM, Queiroz MAÁ, Araújo GGLD, Matos MHTD, Wischral A. Effect of reduced water intake on ovarian reserve, leptin immunoexpression and impact of leptin on the in vitro culture of sheep secondary follicles. Anim Reprod Sci 2023; 255:107278. [PMID: 37390679 DOI: 10.1016/j.anireprosci.2023.107278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/22/2023] [Accepted: 06/07/2023] [Indexed: 07/02/2023]
Abstract
This study evaluated the effect of reduced water intake on survival, apoptosis and immunoexpression of leptin in sheep preantral follicles, activation of primordial follicles, serum levels of leptin, estradiol (E2) and progesterone (P4), and in vitro maturation (IVM) of oocytes antral follicles, as well evaluated the effects of leptin on in vitro culture of secondary follicles isolated these animals. Ewes (n = 32) were divided into four groups: water ad libitum (Control - 100%), 80%; 60% and 40% of ad libitum intake. Blood was collected to determine, leptin, E2 and P4, before and after experiment. After the slaughter, ovarian cortex was used to histological and immunohistochemistry analysis and oocytes IVM. Moreover, isolated secondary follicles were cultured in vitro for 12 days in control medium (α-MEM+) or α-MEM+ with 10 or 25 ng/mL leptin. The reduction of water intake caused a linear decreasing effect on the percentages of normal preantral follicles, especially of primordial (P < 0.05), increased the apoptosis (P < 0.05) and decreased leptin expression in preantral follicles. The treatment with 60% of water intake showed greater total growth rate of isolated secondary follicles cultured with 25 ng/L leptin (P < 0.05), compared to those cultured in α-MEM+ . In conclusion, reduced water intake impaired the number of normal sheep preantral follicles, especially of primordial follicles, increased apoptosis and decreased leptin expression in preantral follicles. Moreover, secondary follicles from of ewes that receive 60% water intake increased follicular growth after in vitro culture with 25 ng/mL leptin.
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Affiliation(s)
- Vanúzia Gonçalves Menezes
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil.
| | - Alane Pains Oliveira do Monte
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| | - Ricássio de Sousa Barberino
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| | - Bruna Bortoloni Gouveia
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| | - Thae Lane Barbosa Gama Lins
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| | - Taís Jobard Silva E Macedo
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| | | | - Cleyton de Almeida Araújo
- Postgraduate Program in Animal Science and Pastures, Universidade Federal do Agreste Pernambucano, Garanhuns, PE, Brazil
| | - Fleming Sena Campos
- Postgraduate Program in Animal Science and Pastures, Universidade Federal do Agreste Pernambucano, Garanhuns, PE, Brazil; Departamento de Ciência Animal, Centro de Ciências de Chapadinha - CCCh, Universidade Federal do Maranhão - UFMA, Chapadina, MA, 65500-000 Brazil
| | - Emanuel Felipe de Oliveira Filho
- Laboratory of Deficiency and Metabolic Diseases and Poisoning of Ruminants, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil
| | - André Mariano Batista
- Laboratory of Biotechnics Applied to Reproduction, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil
| | - Mário Adriano Ávila Queiroz
- Laboratory of Bromatology and Animal Nutrition, Universidade Federal Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| | | | - Maria Helena Tavares de Matos
- Nucleus of Biotechnology Applied to Ovarian Follicle Development, Universidade Federal do Vale do São Francisco, Petrolina, PE, Brazil
| | - Aurea Wischral
- Laboratory of Biotechnics Applied to Reproduction, Universidade Federal Rural de Pernambuco, Recife, PE, Brazil
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Postmus AC, Kruit JK, Eilers RE, Havinga R, Koster MH, Johmura Y, Nakanishi M, van de Sluis B, Jonker JW. The chemotherapeutic drug doxorubicin does not exacerbate p16 Ink4a-positive senescent cell accumulation and cardiometabolic disease development in young adult female LDLR-deficient mice. Toxicol Appl Pharmacol 2023; 468:116531. [PMID: 37088304 DOI: 10.1016/j.taap.2023.116531] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/05/2023] [Accepted: 04/19/2023] [Indexed: 04/25/2023]
Abstract
Cancer survivors who received chemotherapy, such as the anthracycline doxorubicin (DOX), have an increased risk of developing complications later in life, including the development of chronic metabolic diseases. Although the etiology of this increased risk for late metabolic complications in cancer survivors is poorly understood, a causal role of therapy-induced senescent cells has been suggested. To study the role of cellular senescence in chemotherapy-induced metabolic complications, young adult female low-density lipoprotein receptor-deficient (Ldlr-/-)-p16-3MR mice, in which p16Ink4a-positive (p16Ink4a+) senescent cells can be genetically eliminated, were treated with four weekly injections of DOX (2.5 mg/kg) followed by a high-fat high-cholesterol diet for 12 weeks. While DOX treatment induced known short-term effects, such as reduction in body weight, gonadal fat mass, and adipose tissue inflammation, it was not associated with significant long-term effects on glucose homeostasis, hepatic steatosis, or atherosclerosis. We further found no evidence of DOX-induced accumulation of p16Ink4a+-senescent cells at 1 or 12 weeks after DOX treatment. Neither did we observe an effect of elimination of p16Ink4a+-senescent cells on the development of diet-induced cardiometabolic complications in DOX-treated mice. Other markers for senescence were generally also not affected except for an increase in p21 and Cxcl10 in gonadal white adipose tissue long-term after DOX treatment. Together, our study does not support a significant role for p16Ink4a+-senescent cells in the development of diet-induced cardiometabolic disease in young adult DOX-treated female Ldlr-/- mice. These findings illustrate the need of further studies to understand the link between cancer therapy and cardiometabolic disease development in cancer survivors.
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Affiliation(s)
- Andrea C Postmus
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, the Netherlands
| | - Janine K Kruit
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, the Netherlands
| | - Roos E Eilers
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, the Netherlands
| | - Rick Havinga
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, the Netherlands
| | - Mirjam H Koster
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, the Netherlands
| | - Yoshikazu Johmura
- Division of Cancer and Senescence Biology, Cancer Research Institute, Institute for Frontier Science Initiative, Kanazawa University, Kakuma, Kanazawa, Japan
| | - Makoto Nakanishi
- Division of Cancer Cell Biology, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Bart van de Sluis
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, the Netherlands
| | - Johan W Jonker
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713 GZ Groningen, the Netherlands.
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