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Taniguchi A, Susa T, Kogo H, Iizuka-Kogo A, Yokoo S, Matsuzaki T. Long-term Pilocarpine Treatment Improves Salivary Flow in Irradiated Mice. Acta Histochem Cytochem 2019; 52:45-58. [PMID: 31341340 PMCID: PMC6643095 DOI: 10.1267/ahc.19006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 05/28/2019] [Indexed: 12/11/2022] Open
Abstract
Radiation therapy for head and neck cancer frequently causes salivary gland dysfunction. Pilocarpine is a clinically approved and effective drug that induces saliva secretion, thereby keeping the oral mucosa moist and reducing discomfort in patients, but the effect is transient. We expected that this drug also has beneficial long-term effects that maintain the integrity of salivary glands by reducing, for instance, apoptosis. Here, we examined the effects of long-term pilocarpine administration in irradiated mice. The results indicated that long-term pilocarpine administration significantly improved salivary flow in irradiated mice, suggesting the potential beneficial effects of long-term administration. To elucidate the underlying mechanism, we analyzed the histology, apoptosis, and proliferation of acinar cells, and the expression of functional membrane proteins such as transmembrane member 16A, aquaporin-5, and Na-K-Cl cotransporter. Long-term pilocarpine treatment seemed to decrease irradiation-induced apoptosis, although the change was not statistically significant. The present results indicated that long-term administration of pilocarpine has beneficial effects on salivary flow in irradiated mice, and suggested that long-term administration possibly decreases apoptosis in irradiated salivary glands.
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Affiliation(s)
- Akie Taniguchi
- Department of Oral and Maxillofacial Surgery, and Plastic Surgery, Gunma University Graduate School of Medicine
- Department of Anatomy and Cell Biology, Gunma University Graduate School of Medicine
| | - Taketo Susa
- Department of Oral and Maxillofacial Surgery, and Plastic Surgery, Gunma University Graduate School of Medicine
- Department of Anatomy and Cell Biology, Gunma University Graduate School of Medicine
| | - Hiroshi Kogo
- Department of Anatomy and Cell Biology, Gunma University Graduate School of Medicine
| | - Akiko Iizuka-Kogo
- Department of Anatomy and Cell Biology, Gunma University Graduate School of Medicine
| | - Satoshi Yokoo
- Department of Oral and Maxillofacial Surgery, and Plastic Surgery, Gunma University Graduate School of Medicine
| | - Toshiyuki Matsuzaki
- Department of Anatomy and Cell Biology, Gunma University Graduate School of Medicine
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Ingles J, Simpson A, Kyathanahalli C, Anamthathmakula P, Hassan S, Jeyasuria P, Condon JC. Preconditioning the uterine unfolded protein response maintains non-apoptotic Caspase 3-dependent quiescence during pregnancy. Cell Death Dis 2018; 9:933. [PMID: 30224704 PMCID: PMC6141493 DOI: 10.1038/s41419-018-1000-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 07/24/2018] [Accepted: 07/27/2018] [Indexed: 02/06/2023]
Abstract
The prevention of apoptotic caspase 3 activation through biological preconditioning, mediated through the modulation of the unfolded protein response has been demonstrated to ameliorate multiple pathophysiologies. The maintenance of non-apoptotic caspase 3 activity by the unfolded protein response within the pregnant uterus has previously been proven to be critical in inhibiting uterine myocyte contractility during pregnancy. Here we report that the pregnant uterus utilizes an unfolded protein response-preconditioning paradigm to conserve myometrial caspase 3 in a non-apoptotic state in order to effectively inhibit uterine contractility thereby preventing the onset of preterm labor. In the absence of appropriate endogenous preconditioning during pregnancy, uterine caspase 3 is transformed from a non-apoptotic to an apoptotic phenotype. Apoptotic caspase 3 activation results in the precocious triggering of local uterine inflammatory signaling and prostaglandin production, consequently resulting in an increased incidence of preterm birth. These findings represent a paradigm shift in our understanding of how preconditioning promotes the maintenance of uterine non-apoptotic caspase 3 action during pregnancy preventing the onset of premature uterine contraction and therefore defining the timing of the onset of labor.
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Affiliation(s)
- Judith Ingles
- Department of Physiology, School of Medicine, Wayne State University, Detroit, MI, USA
| | - Arren Simpson
- Department of Biology, University of Detroit Mercy, Detroit, MI, USA
| | | | | | - Sonia Hassan
- Department of Physiology, School of Medicine, Wayne State University, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA.,Perinatal Research Initiative in support of the Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda and Detroit, MD and MI, USA
| | - Pancharatnam Jeyasuria
- Department of Physiology, School of Medicine, Wayne State University, Detroit, MI, USA.,Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA.,Perinatal Research Initiative in support of the Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda and Detroit, MD and MI, USA
| | - Jennifer C Condon
- Department of Physiology, School of Medicine, Wayne State University, Detroit, MI, USA. .,Department of Obstetrics and Gynecology, Wayne State University, Detroit, MI, USA. .,Perinatal Research Initiative in support of the Perinatology Research Branch, Division of Obstetrics and Maternal-Fetal Medicine, Division of Intramural Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, U. S. Department of Health and Human Services, Bethesda and Detroit, MD and MI, USA.
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Ramnarayanan S, Kyathanahalli C, Ingles J, Park-York M, Jeyasuria P, Condon JC. The Unfolded Protein Response Regulates Uterine Myocyte Antioxidant Responsiveness During Pregnancy. Biol Reprod 2016; 95:120. [PMID: 27733380 PMCID: PMC5315424 DOI: 10.1095/biolreprod.116.141804] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Revised: 06/14/2016] [Accepted: 09/29/2016] [Indexed: 12/31/2022] Open
Abstract
There is considerable evidence that implicates oxidative stress in the pathophysiology of human pregnancy complications. However, the role and the mechanism of maintaining an antioxidant prosurvival uterine environment during normal pregnancy is largely unresolved. Herein we report that the highly active uterine unfolded protein response plays a key role in promoting antioxidant activity in the uterine myocyte across gestation. The unfolded protein response (UPR) senses the accumulation of misfolded proteins in the endoplasmic reticulum (ER) and activates a signaling network that consists of the transmembrane protein kinase eukaryotic translation initiation factor 2 alpha kinase 3/PKR-like-ER kinase (EIF2AK3), which acts to decrease protein translation levels, allowing for a lowered need for protein folding during periods of ER stress. However, independent of its translational regulatory capacity, EIF2AK3-dependent signals elicit the activation of the transcription factor, nuclear factor erythroid 2-like 2 (NFE2L2) in response to oxidative stress. NFE2L2 binds to antioxidant response elements in the promoters of a variety of antioxidant genes that minimize the opportunities for generation of reactive oxygen intermediates. Our analysis demonstrates that in the absence of EIF2AK3, the uterine myocyte experiences increased levels of reactive oxygen species due to decreased NFE2L2 activation. Elevated levels of intracellular reactive oxygen species were observed in the EIF2AK3 null cells, and this was associated with the onset of apoptotic cell death. These findings confirm the prosurvival and antioxidant role of UPR-mediated EIF2AK3 activation in the context of the human uterine myocyte.
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Affiliation(s)
- Saiprasad Ramnarayanan
- Department of Obstetrics and Gynecology, School of Medicine, Wayne State University, Detroit, Michigan
| | | | - Judith Ingles
- Department of Obstetrics and Gynecology, School of Medicine, Wayne State University, Detroit, Michigan
| | - MieJung Park-York
- Department of Obstetrics and Gynecology, School of Medicine, Wayne State University, Detroit, Michigan
| | - Pancharatnam Jeyasuria
- Department of Obstetrics and Gynecology, School of Medicine, Wayne State University, Detroit, Michigan
- Department of Physiology, School of Medicine, Wayne State University, Detroit, Michigan
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland
| | - Jennifer C Condon
- Department of Obstetrics and Gynecology, School of Medicine, Wayne State University, Detroit, Michigan
- Department of Physiology, School of Medicine, Wayne State University, Detroit, Michigan
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland
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Pinto AT, Pinto ML, Velho S, Pinto MT, Cardoso AP, Figueira R, Monteiro A, Marques M, Seruca R, Barbosa MA, Mareel M, Oliveira MJ, Rocha S. Intricate Macrophage-Colorectal Cancer Cell Communication in Response to Radiation. PLoS One 2016; 11:e0160891. [PMID: 27513864 PMCID: PMC4981353 DOI: 10.1371/journal.pone.0160891] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 07/26/2016] [Indexed: 11/19/2022] Open
Abstract
Both cancer and tumour-associated host cells are exposed to ionizing radiation when a tumour is subjected to radiotherapy. Macrophages frequently constitute the most abundant tumour-associated immune population, playing a role in tumour progression and response to therapy. The present work aimed to evaluate the importance of macrophage-cancer cell communication in the cellular response to radiation. To address this question, we established monocultures and indirect co-cultures of human monocyte-derived macrophages with RKO or SW1463 colorectal cancer cells, which exhibit higher and lower radiation sensitivity, respectively. Mono- and co-cultures were then irradiated with 5 cumulative doses, in a similar fractionated scheme to that used during cancer patients' treatment (2 Gy/fraction/day). Our results demonstrated that macrophages sensitize RKO to radiation-induced apoptosis, while protecting SW1463 cells. Additionally, the co-culture with macrophages increased the mRNA expression of metabolism- and survival-related genes more in SW1463 than in RKO. The presence of macrophages also upregulated glucose transporter 1 expression in irradiated SW1463, but not in RKO cells. In addition, the influence of cancer cells on the expression of pro- and anti-inflammatory macrophage markers, upon radiation exposure, was also evaluated. In the presence of RKO or SW1463, irradiated macrophages exhibit higher levels of pro-inflammatory TNF, IL6, CCL2 and CCR7, and of anti-inflammatory CCL18. However, RKO cells induce an increase of macrophage pro-inflammatory IL1B, while SW1463 cells promote higher pro-inflammatory CXCL8 and CD80, and also anti-inflammatory VCAN and IL10 levels. Thus, our data demonstrated that macrophages and cancer cells mutually influence their response to radiation. Notably, conditioned medium from irradiated co-cultures increased non-irradiated RKO cell migration and invasion and did not impact on angiogenesis in a chicken embryo chorioallantoic membrane assay. Overall, the establishment of primary human macrophage-cancer cell co-cultures revealed an intricate cell communication in response to ionizing radiation, which should be considered when developing therapies adjuvant to radiotherapy.
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Affiliation(s)
- Ana T. Pinto
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB-Institute of Biomedical Engineering, University of Porto, Porto, Portugal
- FEUP-Faculty of Engineering, University of Porto, Porto, Portugal
| | - Marta L. Pinto
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB-Institute of Biomedical Engineering, University of Porto, Porto, Portugal
- ICBAS-Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
| | - Sérgia Velho
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IPATIMUP-Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
| | - Marta T. Pinto
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IPATIMUP-Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
| | - Ana P. Cardoso
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB-Institute of Biomedical Engineering, University of Porto, Porto, Portugal
| | - Rita Figueira
- Radiotherapy Service, Centro Hospitalar S. João, EPE, Porto, Portugal
| | - Armanda Monteiro
- Radiotherapy Service, Centro Hospitalar S. João, EPE, Porto, Portugal
| | - Margarida Marques
- Radiotherapy Service, Centro Hospitalar S. João, EPE, Porto, Portugal
| | - Raquel Seruca
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- IPATIMUP-Institute of Molecular Pathology and Immunology of the University of Porto, Porto, Portugal
- Department of Pathology and Oncology, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Mário A. Barbosa
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB-Institute of Biomedical Engineering, University of Porto, Porto, Portugal
- ICBAS-Institute of Biomedical Sciences Abel Salazar, University of Porto, Porto, Portugal
| | - Marc Mareel
- Department of Radiation Oncology and Experimental Cancer Research, Ghent University Hospital, Ghent, Belgium
| | - Maria J. Oliveira
- i3s-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- INEB-Institute of Biomedical Engineering, University of Porto, Porto, Portugal
- Department of Pathology and Oncology, Faculty of Medicine, University of Porto, Porto, Portugal
- * E-mail:
| | - Sónia Rocha
- Centre for Gene Regulation and Expression, College of Life Sciences, University of Dundee, Dundee, United Kingdom
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Uterine endoplasmic reticulum stress-unfolded protein response regulation of gestational length is caspase-3 and -7-dependent. Proc Natl Acad Sci U S A 2015; 112:14090-5. [PMID: 26504199 DOI: 10.1073/pnas.1518309112] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
We previously identified myometrial caspase-3 (CASP3) as a potential regulator of uterine quiescence. We also determined that during pregnancy, the functional activation of uterine CASP3 is likely governed by an integrated endoplasmic reticulum stress response (ERSR) and is consequently limited by an increased unfolded protein response (UPR). The present study examined the functional relevance of uterine UPR-ERSR in maintaining myometrial quiescence and regulating the timing of parturition. In vitro analysis of the human uterine myocyte hTERT-HM cell line revealed that tunicamycin (TM)-induced ERSR modified uterine myocyte contractile responsiveness. Accordingly, alteration of in vivo uterine UPR-ERSR using a pregnant mouse model significantly modified gestational length. We determined that "normal" gestational activation of the ERSR-induced CASP3 and caspase 7 (CASP7) maintains uterine quiescence through previously unidentified proteolytic targeting of the gap junction protein, alpha 1(GJA1); however, surprisingly, TM-induced uterine ERSR triggered an exaggerated UPR that eliminated uterine CASP3 and 7 tocolytic action precociously. These events allowed for a premature increase in myometrial GJA1 levels, elevated contractile responsiveness, and the onset of preterm labor. Importantly, a successful reversal of the magnified ERSR-induced preterm birth phenotype could be achieved by pretreatment with 4-phenylbutrate, a chaperone protein mimic.
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Yang Y, Li C, Xiang X, Dai Z, Chang J, Zhang M, Cai H, Zhang H, Zhang M, Guo Y, Wu Z. Ursolic acid prevents endoplasmic reticulum stress-mediated apoptosis induced by heat stress in mouse cardiac myocytes. J Mol Cell Cardiol 2014; 67:103-11. [PMID: 24389342 DOI: 10.1016/j.yjmcc.2013.12.018] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 12/05/2013] [Accepted: 12/23/2013] [Indexed: 01/15/2023]
Abstract
Heat stress causes serious physiological dysfunction of cardiac myocytes and is associated with several types of cardiovascular diseases. However, the underlying mechanisms and therapeutic strategies to alleviate heat stress-induced myocardial damage are not available. The objective of this study was to (1) investigate the functional role of endoplasmic reticulum (ER) stress-mediated apoptosis in heat exposure-induced myocardial damage, and (2) to evaluate the effects of ursolic acid on the myocardial apoptosis as well as the underlying mechanisms in mouse cardiac myocytes. We show here that heat stress-induced apoptosis is predominantly mediated by the activation of PERK-eIF2α-CHOP unfolded protein response which up-regulates the protein expression of Puma, and by the modulation of cellular redox state. Intriguingly, the myocardial apoptosis is markedly attenuated by ursolic acid treatment. Mechanistically, the protective effects of ursolic acid are mediated, at least partly, by reestablishing the intracellular redox state and inducing the expression of the anti-apoptotic protein Mcl-1, which, in turn, inactivating CHOP-induced Puma up-regulation. The striking finding that ursolic acid has both anti-apoptotic and antioxidative activities against ER stress-associated myocardial damage suggests that supplementation of ursolic acid might be a potential strategy to reduce the detrimental effects of heat stress in cardiomyocytes.
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Affiliation(s)
- Ying Yang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Changwu Li
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Xi Xiang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, PR China
| | - Zhaolai Dai
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Jianyu Chang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, PR China
| | - Ming Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Hong Cai
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Hua Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China
| | - Meijia Zhang
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, 100193, PR China
| | - Yuming Guo
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China.
| | - Zhenlong Wu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, PR China.
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Kyathanahalli C, Marks J, Nye K, Lao B, Albrecht ED, Aberdeen GW, Nathanielsz PW, Jeyasuria P, Condon JC. Cross-species withdrawal of MCL1 facilitates postpartum uterine involution in both the mouse and baboon. Endocrinology 2013; 154:4873-84. [PMID: 24140717 PMCID: PMC3836074 DOI: 10.1210/en.2013-1325] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A successful postpartum involution permits the postnatal uterus to rapidly regain its prepregnancy function and size to ultimately facilitate an ensuing blastocyst implantation. This study investigates the molecular mechanisms that govern the initiation of the involution process by examining the signaling events that occur as the uterus transitions from the pregnant to postnatal state. Using mouse and baboon uteri, we found a remarkable cross-species conservation at the signal transduction level as the pregnant uterus initiates and progresses through the involution process. This study originated with the observation of elevated levels of caspase-3 activation in both the laboring mouse and baboon uterus, which we found to be apoptotic in nature as evidenced by the concurrent appearance of cleaved poly(ADP-ribose) polymerase. We previously defined a nonapoptotic and potential tocolytic role for uterine caspase-3 during pregnancy regulated by increased antiapoptotic signaling mediated by myeloid cell leukemia sequence 1 and X-linked inhibitor of apoptosis. In contrast, this study determined that diminished antiapoptotic signaling in the postpartum uterus allowed for both endometrial apoptotic and myometrial autophagic episodes, which we speculate are responsible for the rapid reduction in size of the postpartum uterus. Using our human telomerase immortalized myometrial cell line and the Simian virus-40 immortalized endometrial cell line (12Z), we demonstrated that the withdrawal of antiapoptotic signaling was also an upstream event for both the autophagic and apoptotic processes in the human uterine myocyte and endometrial epithelial cell.
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Miuma S, Saldivar JC, Karras JR, Waters CE, Paisie CA, Wang Y, Jin V, Sun J, Druck T, Zhang J, Huebner K. Fhit deficiency-induced global genome instability promotes mutation and clonal expansion. PLoS One 2013; 8:e80730. [PMID: 24244712 PMCID: PMC3828255 DOI: 10.1371/journal.pone.0080730] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 10/07/2013] [Indexed: 01/25/2023] Open
Abstract
Loss of Fhit expression, encoded at chromosome fragile site FRA3B, leads to increased replication stress, genome instability and accumulation of genetic alterations. We have proposed that Fhit is a genome ‘caretaker’ whose loss initiates genome instability in preneoplastic lesions. We have characterized allele copy number alterations and expression changes observed in Fhit-deficient cells in conjunction with alterations in cellular proliferation and exome mutations, using cells from mouse embryo fibroblasts (MEFs), mouse kidney, early and late after establishment in culture, and in response to carcinogen treatment. Fhit-/- MEFs escape senescence to become immortal more rapidly than Fhit+/+ MEFs; -/- MEFs and kidney cultures show allele losses and gains, while +/+ derived cells show few genomic alterations. Striking alterations in expression of p53, p21, Mcl1 and active caspase 3 occurred in mouse kidney -/- cells during progressive tissue culture passage. To define genomic changes associated with preneoplastic changes in vivo, exome DNAs were sequenced for +/+ and -/- liver tissue after treatment of mice with the carcinogen, 7,12-dimethylbenz[a]anthracene, and for +/+ and -/- kidney cells treated in vitro with this carcinogen. The -/- exome DNAs, in comparison with +/+ DNA, showed small insertions, deletions and point mutations in more genes, some likely related to preneoplastic changes. Thus, Fhit loss provides a ‘mutator’ phenotype, a cellular environment in which mild genome instability permits clonal expansion, through proliferative advantage and escape from apoptosis, in response to pressures to survive.
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Affiliation(s)
- Satoshi Miuma
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Joshua C. Saldivar
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Jenna R. Karras
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Catherine E. Waters
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Carolyn A. Paisie
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Yao Wang
- Department of Biomedical Informatics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Victor Jin
- Department of Biomedical Informatics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Jin Sun
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Teresa Druck
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Jie Zhang
- Department of Biomedical Informatics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
| | - Kay Huebner
- Department of Molecular Virology, Immunology and Medical Genetics, Ohio State University Wexner Medical Center, Columbus, Ohio, United States of America
- * E-mail:
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Suresh A, Subedi K, Kyathanahalli C, Jeyasuria P, Condon JC. Uterine endoplasmic reticulum stress and its unfolded protein response may regulate caspase 3 activation in the pregnant mouse uterus. PLoS One 2013; 8:e75152. [PMID: 24058658 PMCID: PMC3772854 DOI: 10.1371/journal.pone.0075152] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 08/11/2013] [Indexed: 01/22/2023] Open
Abstract
We have previously proposed that uterine caspase-3 may modulate uterine contractility in a gestationally regulated fashion. The objective of this study was to determine the mechanism by which uterine caspase-3 is activated and consequently controlled in the pregnant uterus across gestation. Utilizing the mouse uterus as our gestational model we examined the intrinsic and extrinsic apoptotic signaling pathways and the endoplasmic reticulum stress response as potential activators of uterine caspase-3 at the transcriptional and translational level. Our study revealed robust activation of the uterine myocyte endoplasmic reticulum stress response and its adaptive unfolded protein response during pregnancy coinciding respectively with increased uterine caspase-3 activity and its withdrawal to term. In contrast the intrinsic and extrinsic apoptotic signaling pathways remained inactive across gestation. We speculate that physiological stimuli experienced by the pregnant uterus likely potentiates the uterine myocyte endoplasmic reticulum stress response resulting in elevated caspase-3 activation, which is isolated to the pregnant mouse myometrium. However as term approaches, activation of an elevated adaptive unfolded protein response acts to limit the endoplasmic reticulum stress response inhibiting caspase-3 resulting in its decline towards term. We speculate that these events have the capacity to regulate gestational length in a caspase-3 dependent manner.
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Affiliation(s)
- Arvind Suresh
- Department of Obstetrics and Gynecology, Magee Women’s Research Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Cell Biology, Magee Women’s Research Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Kalpana Subedi
- Department of Obstetrics and Gynecology, Magee Women’s Research Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Chandrashekara Kyathanahalli
- Department of Obstetrics and Gynecology, Magee Women’s Research Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Pancharatnam Jeyasuria
- Department of Obstetrics and Gynecology, Magee Women’s Research Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
| | - Jennifer C. Condon
- Department of Obstetrics and Gynecology, Magee Women’s Research Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- Department of Cell Biology, Magee Women’s Research Institute, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
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