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Gao H, Zhou F, Li R, Yuan J, Ye L. E2F1 inhibits cellular senescence and promotes oxaliplatin resistance in colorectal cancer. ANNALS OF TRANSLATIONAL MEDICINE 2023; 11:185. [PMID: 36923082 PMCID: PMC10009566 DOI: 10.21037/atm-22-4054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 12/18/2022] [Indexed: 02/18/2023]
Abstract
Background Doctors have always been overwhelmed by tumor drug resistance because it is a major challenge in the clinical treatment of tumors. Cellular senescence has a strong relationship with the development of tumor drug resistance. Herein, we aimed to explore new regulatory factors involved in the aging process of colorectal cancer (CRC) cells and assess the effect of cellular senescence on CRC drug resistance. Methods Genes associated with cellular senescence for anticipating regulatory factors were first used, and the regulatory molecules of survival significance were then identified based on the results of public database analysis. The effects of E2F translation factor 1 (E2F1) on CRC cell viability, invasion, migration, and cellular senescence processes were assessed through 3-(4,5)-dimethylthiahiazo(-z-y1)-3,5-di-phenytetrazoliumromide (MTT), 5-Ethynyl-2'-deoxyuridine (EdU), Transwell, scar repairining, β-galactosidase staining, and cell immunofluorescence assays, respectively. Overexpression or silencing plasmids were used for transfecting HCT116 or OXA-HCT116 to assess the effect of E2F1 on the senescence process and drug resistance in CRC cells. Results On combining the database analysis results with those of our studies, we found that E2F1 was a critical regulator of cellular senescence in CRC. In the in vitro experiments, the E2F1 overexpression significantly stimulated the proliferation, invasion, and migration of CRC cells and even reduced oxaliplatin-induced senescence, further enhancing their resistance to oxaliplatin. Conversely, the tumorigenesis of colorectal cancer was repressed after the suppression of E2F1. Furthermore, CRC cells, which were otherwise resistant to oxaliplatin, also showed senescent phenotypes. Conclusions Our results suggest that E2F1 suppresses the aging of CRC cells and tumor cells develop resistance to oxaliplatin through high E2F1 expression. Moreover, E2F1 may act as a possible target for oxaliplatin resistance studies.
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Affiliation(s)
- Haiyang Gao
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fangyuan Zhou
- Department of Integrated Traditional Chinese and Western Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Runze Li
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jiao Yuan
- Department of Biospecimen Centre, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lin Ye
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Farrukh S, Baig S, Hussain R, Imad R, Khalid M. Parental Genetics Communicate with Intrauterine Environment to Reprogram Newborn Telomeres and Immunity. Cells 2022; 11:cells11233777. [PMID: 36497039 PMCID: PMC9735452 DOI: 10.3390/cells11233777] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 11/22/2022] [Indexed: 11/29/2022] Open
Abstract
Telomeres, markers for cellular senescence, have been found substantially influenced by parental inheritance. It is well known that genomic stability is preserved by the DNA repair mechanism through telomerase. This study aimed to determine the association between parents−newborn telomere length (TL) and telomerase gene (TERT), highlighting DNA repair combined with TL/TERT polymorphism and immunosenescence of the triad. The mother−father−newborn triad blood samples (n = 312) were collected from Ziauddin Hospitals, Pakistan, between September 2021 and June 2022. The telomere length (T/S ratio) was quantified by qPCR, polymorphism was identified by Sanger sequencing, and immunosenescence by flow cytometry. The linear regression was applied to TL and gene association. The newborns had longest TL (2.51 ± 2.87) and strong positive association (R = 0.25, p ≤ 0.0001) (transgenerational health effects) with mothers’ TL (1.6 ± 2.00). Maternal demographics—socioeconomic status, education, and occupation—showed significant effects on TL of newborns (p < 0.015, 0.034, 0.04, respectively). The TERT risk genotype CC (rs2736100) was predominant in the triad (0.6, 0.5, 0.65, respectively) with a strong positive association with newborn TL (β = 2.91, <0.0011). Further analysis highlighted the expression of KLRG 1+ in T-cells with shorter TL but less frequent among newborns. The study concludes that TERT, parental TL, antenatal maternal health, and immunity have a significantly positive effect on the repair of newborn TL.
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Affiliation(s)
- Sadia Farrukh
- Department Biochemistry, Ziauddin University, Karachi 74600, Pakistan
- Correspondence: (S.F.); (S.B.)
| | - Saeeda Baig
- Department Biochemistry, Ziauddin University, Karachi 74600, Pakistan
- Correspondence: (S.F.); (S.B.)
| | - Rubina Hussain
- Department Gynecology and Obstetrics, Ziauddin University, Karachi 74600, Pakistan
| | - Rehan Imad
- Department Molecular Medicine, Ziauddin University, Karachi 74600, Pakistan
| | - Maria Khalid
- Department Gynecology and Obstetrics, Ziauddin University, Karachi 74600, Pakistan
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Wei H, Aucoin J, Kuntapay GR, Justice A, Jones A, Zhang C, Santos HP, Hall LA. The prevalence of nurse burnout and its association with telomere length pre and during the COVID-19 pandemic. PLoS One 2022; 17:e0263603. [PMID: 35294438 PMCID: PMC8926201 DOI: 10.1371/journal.pone.0263603] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 01/22/2022] [Indexed: 11/18/2022] Open
Abstract
Background Burnout is a work-related stress syndrome characterized by emotional exhaustion, depersonalization, and reduced personal accomplishment. Nurse burnout is related to nurses’ deteriorating mental health and poorer patient care quality and thus, is a significant concern in healthcare. The Coronavirus Disease 2019 (COVID-19) pandemic has swept the world and distressed the healthcare systems. Because of the body’s stress mechanism, it is vital to examine the current prevalence of nurse burnout and understand it at a biological level, using an epigenetic biomarker, telomere length. Purpose To determine the prevalence of burnout among nurses in the Peri-Operative and Labor & Delivery settings pre and during the COVID-19 pandemic and to examine the effects of burnout on absolute telomere length. Methods This is a cross-sectional study assessing the prevalence of nurses’ burnout and the relationships between nurses’ burnout and telomere length. Due to the COVID-19 pandemic, we had to stop the study during the mid of data collection. Even though the study was not designed to capture changes before and during the pandemic, we analyzed two groups’ data before and during the pandemic. The study took place in a US hospital. Nurses in the hospital’s Operating Room, Post-Anesthesia Care Unit, and Labor & Delivery Unit participated in the study. Maslach Burnout Inventory survey and nurses’ demographics were administered online. Telomere length was measured via finger-prick blood. Results 146 nurses participated in the study, with 120 participants’ blood samples collected. The high-level burnout rate was 70.5%. Correlation analysis did not reveal a direct correlation between nurse burnout and telomere length. However, in a multiple regression analysis, the final model contained the burnout subscale of emotional exhaustion, years as an RN, and work unit’s nursing care quality. There was a low degree of departure from normality of the mean absolute telomere length in the pre-pandemic group and a substantial degree of departure in the during-pandemic group. Conclusions Nurse burnout is a prevalent phenomenon in healthcare, and this study indicates that nurses currently experience high levels of burnout. Nurses’ cellular biomarker, telomere length, is shorter in the group of nurses during the COVID-19 pandemic than before. Appropriate measures should be implemented to decrease nurses’ burnout symptoms and improve nurses’ psychological and physical health. Nurses, especially those younger than 60, report higher burnout symptoms, particularly emotional exhaustion. This study indicates the need for intervention to promote nurses’ health during the pandemic and beyond. If not appropriately managed, nurse burnout may continue to be a significant issue facing the healthcare system.
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Affiliation(s)
- Holly Wei
- University of Louisville School of Nursing, Louisville, KY, United States of America
- * E-mail:
| | - Julia Aucoin
- University of North Carolina REX Healthcare, Raleigh, NC, United States of America
| | | | - Amber Justice
- University of North Carolina REX Healthcare, Raleigh, NC, United States of America
| | - Abigail Jones
- Piedmont Athens Regional Medical Center, Athens, GA, United States of America
| | - Chongben Zhang
- Biobehavioral Lab, University of North Carolina Chapel Hill, NC, United States of America
| | - Hudson P. Santos
- Biobehavioral Laboratory and Health Resilience & Omics Science (HEROS) Hub, University of North Carolina Chapel Hill, NC, United States of America
| | - Lynne A. Hall
- University of Louisville School of Nursing, Louisville, KY, United States of America
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Yamaguchi E, Akutsu T, Nacher JC. Probabilistic Critical Controllability Analysis of Protein Interaction Networks Integrating Normal Brain Ageing Gene Expression Profiles. Int J Mol Sci 2021; 22:ijms22189891. [PMID: 34576052 PMCID: PMC8465977 DOI: 10.3390/ijms22189891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 08/27/2021] [Accepted: 09/05/2021] [Indexed: 11/16/2022] Open
Abstract
Recently, network controllability studies have proposed several frameworks for the control of large complex biological networks using a small number of life molecules. However, age-related changes in the brain have not been investigated from a controllability perspective. In this study, we compiled the gene expression profiles of four normal brain regions from individuals aged 20–99 years and generated dynamic probabilistic protein networks across their lifespan. We developed a new algorithm that efficiently identified critical proteins in probabilistic complex networks, in the context of a minimum dominating set controllability model. The results showed that the identified critical proteins were significantly enriched with well-known ageing genes collected from the GenAge database. In particular, the enrichment observed in replicative and premature senescence biological processes with critical proteins for male samples in the hippocampal region led to the identification of possible new ageing gene candidates.
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Affiliation(s)
- Eimi Yamaguchi
- Department of Information Science, Faculty of Science, Toho University, Funabashi 274-8510, Japan;
| | - Tatsuya Akutsu
- Bioinformatics Center, Institute for Chemical Research, Kyoto University, Uji 611-0011, Japan;
| | - Jose C. Nacher
- Department of Information Science, Faculty of Science, Toho University, Funabashi 274-8510, Japan;
- Correspondence:
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Romaniuk-Drapała A, Totoń E, Konieczna N, Machnik M, Barczak W, Kowal D, Kopczyński P, Kaczmarek M, Rubiś B. hTERT Downregulation Attenuates Resistance to DOX, Impairs FAK-Mediated Adhesion, and Leads to Autophagy Induction in Breast Cancer Cells. Cells 2021; 10:cells10040867. [PMID: 33920284 PMCID: PMC8068966 DOI: 10.3390/cells10040867] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/06/2021] [Accepted: 04/07/2021] [Indexed: 12/13/2022] Open
Abstract
Telomerase is known to contribute to telomere maintenance and to provide cancer cell immortality. However, numerous reports are showing that the function of the enzyme goes far beyond chromosome ends. The study aimed to explore how telomerase downregulation in MCF7 and MDA-MB-231 breast cancer cells affects their ability to survive. Consequently, sensitivity to drug resistance, proliferation, and adhesion were assessed. The lentiviral-mediated human telomerase reverse transcriptase (hTERT) downregulation efficiency was performed at gene expression and protein level using qPCR and Western blot, respectively. Telomerase activity was evaluated using the Telomeric Repeat Amplification Protocol (TRAP) assay. The study revealed that hTERT downregulation led to an increased sensitivity of breast cancer cells to doxorubicin which was demonstrated in MTT and clonogenic assays. During a long-term doubling time assessment, a decreased population doubling level was observed. Interestingly, it did not dramatically affect cell cycle distribution. hTERT downregulation was accompanied by an alteration in β1-integrin- and by focal adhesion kinase (FAK)-driven pathways together with the reduction of target proteins phosphorylation, i.e., paxillin and c-Src. Additionally, autophagy activation was observed in MDA-MB-231 cells manifested by alternations in Atg5, Beclin 1, LC3II/I ratio, and p62. These results provide new evidence supporting the possible therapeutic potential of telomerase downregulation leading to induction of autophagy and cancer cells elimination.
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Affiliation(s)
- Aleksandra Romaniuk-Drapała
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Ewa Totoń
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Natalia Konieczna
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Marta Machnik
- Department of Cancer Immunology, Poznan University of Medical Sciences, 60-806 Poznan, Poland;
| | - Wojciech Barczak
- Department of Head and Neck Surgery, Poznan University of Medical Sciences, The Greater Poland Cancer Centre, 61-866 Poznan, Poland;
| | - Dagmar Kowal
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
| | - Przemysław Kopczyński
- Centre for Orthodontic Mini-Implants at the Department and Clinic of Maxillofacial Orthopedics and Orthodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland;
| | - Mariusz Kaczmarek
- Department of Immunology, Chair of Clinical Immunology, Poznań University of Medical Sciences, 5D Rokietnicka St., 60-806 Poznań, Poland;
| | - Błażej Rubiś
- Department of Clinical Chemistry and Molecular Diagnostics, Poznan University of Medical Sciences, 49 Przybyszewskiego St., 60-355 Poznań, Poland; (A.R.-D.); (E.T.); (N.K.); (D.K.)
- Correspondence: ; Tel.: +48-61-869-14-27
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D'Amelio P. Vitamin D Deficiency and Risk of Metabolic Syndrome in Aging Men. World J Mens Health 2021; 39:291-301. [PMID: 33663024 PMCID: PMC7994656 DOI: 10.5534/wjmh.200189] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 12/10/2020] [Accepted: 12/22/2020] [Indexed: 12/11/2022] Open
Abstract
The elderly population is rapidly increasing; hence, the disability due to age-related diseases has become an important socioeconomic burden. Amongst age-related diseases cardiovascular ones (CVD) have a huge impact on morbidity and mortality and are associated with metabolic syndrome (MetS). Several studies investigated the role of hypovitaminosis D in the pathogenesis of MetS and of CVD, this review unravels the relationship between aging/senescence, vitamin D, gender, and pathogenesis of MetS.
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Affiliation(s)
- Patrizia D'Amelio
- Department of Internal Medicine, Service of Geriatric Medicine and Geriatric Rehabilitation, University of Lausanne Hospital Centre, Lausanne, Switzerland.
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Ewald AC, Kiernan EA, Roopra AS, Radcliff AB, Timko RR, Baker TL, Watters JJ. Sex- and Region-Specific Differences in the Transcriptomes of Rat Microglia from the Brainstem and Cervical Spinal Cord. J Pharmacol Exp Ther 2020; 375:210-222. [PMID: 32661056 DOI: 10.1124/jpet.120.266171] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 07/07/2020] [Indexed: 12/11/2022] Open
Abstract
The neural control system underlying breathing is sexually dimorphic with males being more vulnerable to dysfunction. Microglia also display sex differences, and their role in the architecture of brainstem respiratory rhythm circuitry and modulation of cervical spinal cord respiratory plasticity is becoming better appreciated. To further understand the molecular underpinnings of these sex differences, we performed RNA sequencing of immunomagnetically isolated microglia from brainstem and cervical spinal cord of adult male and female rats. We used various bioinformatics tools (Gene Ontology, Kyoto Encyclopedia of Genes and Genomes, Reactome, STRING, MAGICTRICKS) to functionally categorize identified gene sets, as well as to pinpoint common transcriptional gene drivers that may be responsible for the observed transcriptomic differences. We found few sex differences in the microglial transcriptomes derived from the brainstem, but several hundred genes were differentially expressed by sex in cervical spinal microglia. Comparing brainstem and spinal microglia within and between sexes, we found that the major factor guiding transcriptomic differences was central nervous system (CNS) location rather than sex. We further identified key transcriptional drivers that may be responsible for the transcriptomic differences observed between sexes and CNS regions; enhancer of zeste homolog 2 emerged as the predominant driver of the differentially downregulated genes. We suggest that functional gene alterations identified in metabolism, transcription, and intercellular communication underlie critical microglial heterogeneity and sex differences in CNS regions that contribute to respiratory disorders categorized by dysfunction in neural control. These data will also serve as an important resource data base to advance our understanding of innate immune cell contributions to sex differences and the field of respiratory neural control. SIGNIFICANCE STATEMENT: The contributions of central nervous system (CNS) innate immune cells to sexually dimorphic differences in the neural circuitry controlling breathing are poorly understood. We identify key transcriptomic differences, and their transcriptional drivers, in microglia derived from the brainstem and the C3-C6 cervical spinal cord of healthy adult male and female rats. Gene alterations identified in metabolism, gene transcription, and intercellular communication likely underlie critical microglial heterogeneity and sex differences in these key CNS regions that contribute to the neural control of breathing.
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Affiliation(s)
- Andrea C Ewald
- Departments of Comparative Biosciences (A.C.E., E.A.K., A.B.R., R.R.T., T.L.B., J.J.W.) and Neuroscience (A.S.R.), University of Wisconsin-Madison, Madison, Wisconsin
| | - Elizabeth A Kiernan
- Departments of Comparative Biosciences (A.C.E., E.A.K., A.B.R., R.R.T., T.L.B., J.J.W.) and Neuroscience (A.S.R.), University of Wisconsin-Madison, Madison, Wisconsin
| | - Avtar S Roopra
- Departments of Comparative Biosciences (A.C.E., E.A.K., A.B.R., R.R.T., T.L.B., J.J.W.) and Neuroscience (A.S.R.), University of Wisconsin-Madison, Madison, Wisconsin
| | - Abigail B Radcliff
- Departments of Comparative Biosciences (A.C.E., E.A.K., A.B.R., R.R.T., T.L.B., J.J.W.) and Neuroscience (A.S.R.), University of Wisconsin-Madison, Madison, Wisconsin
| | - Rebecca R Timko
- Departments of Comparative Biosciences (A.C.E., E.A.K., A.B.R., R.R.T., T.L.B., J.J.W.) and Neuroscience (A.S.R.), University of Wisconsin-Madison, Madison, Wisconsin
| | - Tracy L Baker
- Departments of Comparative Biosciences (A.C.E., E.A.K., A.B.R., R.R.T., T.L.B., J.J.W.) and Neuroscience (A.S.R.), University of Wisconsin-Madison, Madison, Wisconsin
| | - Jyoti J Watters
- Departments of Comparative Biosciences (A.C.E., E.A.K., A.B.R., R.R.T., T.L.B., J.J.W.) and Neuroscience (A.S.R.), University of Wisconsin-Madison, Madison, Wisconsin
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Endén K, Tainio J, Hou M, Suominen A, Pakarinen M, Huang T, Söder O, Jalanko H, Jahnukainen K, Jahnukainen T. Telomere length regulators are activated in young men after pediatric kidney transplantation compared to healthy controls and survivors of childhood cancer-A cross-sectional study. Pediatr Transplant 2019; 23:e13550. [PMID: 31297925 DOI: 10.1111/petr.13550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 05/31/2019] [Accepted: 06/22/2019] [Indexed: 11/29/2022]
Abstract
Chronic diseases are known to cause premature aging and frailty. Data about telomere length and telomere length-regulating proteins after pediatric KTx are scarce. Leukocyte telomere length and gene expression level of eight telomere-binding proteins were analyzed in 20 KTx recipients, eight childhood NBL survivors, and nine healthy controls. The influence of key clinical parameters on telomere length and on regulators of telomere length was evaluated. The telomere length in the KTx recipients tended to be shorter (0.53 AU) than in the healthy controls (0.64 AU) but longer than in the NBL survivors (0.38 AU). There was no significant difference in telomere length between the NBL survivors and the KTx recipients (P = .110). The gene expression level of telomere length-preserving protein RPA1 was significantly higher in the KTx recipients than among the NBL survivors or healthy controls, while the expression of TRF2 and the tumor suppressor gene p16 was significantly higher in the KTX recipients when compared to the controls. TRF2 and TIN2 correlated significantly with hsCRP; additionally, TRF2 showed significant correlation with plasma creatinine and eGFR. KTx recipients have near to normal telomere length, but they have significantly higher gene expression levels of telomere regulatory proteins compared with healthy controls, suggesting activation of mechanisms preserving telomere length among KTx recipients. Our results suggest that declined graft function and consequent inflammatory response may have influence on telomerase activity.
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Affiliation(s)
- Kira Endén
- Department of Pediatric Nephrology and Transplantation, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Department of Pediatrics, Tampere University Hospital, Tampere, Finland
| | - Juuso Tainio
- Department of Pediatric Nephrology and Transplantation, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Mi Hou
- Department of Women's and Children's Health, NORDFERTIL Research Lab, Karolinska Institute and University Hospital, Stockholm, Sweden
| | - Anu Suominen
- Division of Hematology-Oncology and Stem Cell Transplantation, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Mikko Pakarinen
- Pediatric Liver and Gut Research Group and Section of Pediatric Surgery, Children's Hospital, Helsinki University Hospital, Helsinki, Finland
| | - Tao Huang
- School of Medicine, Shandong University, Jihan, China
| | - Olle Söder
- Department of Women's and Children's Health, NORDFERTIL Research Lab, Karolinska Institute and University Hospital, Stockholm, Sweden
| | - Hannu Jalanko
- Department of Pediatric Nephrology and Transplantation, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Kirsi Jahnukainen
- Department of Women's and Children's Health, NORDFERTIL Research Lab, Karolinska Institute and University Hospital, Stockholm, Sweden.,Division of Hematology-Oncology and Stem Cell Transplantation, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - Timo Jahnukainen
- Department of Pediatric Nephrology and Transplantation, Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
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Should we consider telomere length and telomerase activity in male factor infertility? Curr Opin Obstet Gynecol 2019; 30:197-202. [PMID: 29664790 DOI: 10.1097/gco.0000000000000451] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
PURPOSE OF REVIEW The purpose of this review is to analyze what is known to date about the relation between telomeres and male fertility, and if it is possible for telomeres, or elements related to them, to be used as new prognostic biomarkers in fertility treatment. RECENT FINDINGS Cells in germ series, including spermatozoids, have longer telomeres (10-20 kb), and do not seem to undergo the shortening that takes place in somatic cells with age as they present telomerase activity. Longer telomere length found in the sperm of older fathers, influences their offspring possessing cells with longer telomere length. Infertile patients have spermatozoids with shorter telomere length than fertile people, but telomere length does neither correlate with the sperm concentration, mobility or morphology, nor with the DNA fragmentation indices (DFI) of spermatozoids. Embryo quality rate and transplantable embryo rate are related with the telomere length of spermatozoids (STL), but pregnancy rates are not affected. SUMMARY Telomere length and telomerase levels can be used as biomarkers of male fertility. Higher STL can have beneficial effects on fertility, thus the use of spermatozoids with longer telomere length in an assisted reproduction technique (ART) could be one way of solving some infertility cases.
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10
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Effect of master mixes on the measurement of telomere length by qPCR. Mol Biol Rep 2018; 45:633-638. [DOI: 10.1007/s11033-018-4175-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Accepted: 03/24/2018] [Indexed: 01/25/2023]
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Xie J, Li B, Zhang P, Wang L, Lu H, Song X. Osteogenic protein-1 attenuates the inflammatory cytokine-induced NP cell senescence through regulating the ROS/NF-κB pathway. Biomed Pharmacother 2018; 99:431-437. [DOI: 10.1016/j.biopha.2018.01.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 12/21/2017] [Accepted: 01/05/2018] [Indexed: 10/18/2022] Open
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Niu M, Ma F, Qian J, Li J, Wang T, Gao Y, Jin J. N‑cadherin attenuates nucleus pulposus cell senescence under high‑magnitude compression. Mol Med Rep 2017; 17:2879-2884. [PMID: 29257288 PMCID: PMC5783503 DOI: 10.3892/mmr.2017.8239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 10/18/2017] [Indexed: 11/21/2022] Open
Abstract
Mechanical compression is important in disc degeneration. N-cadherin (N-CDH)-mediated signaling contributes to the maintenance of the normal nucleus pulposus (NP) cell phenotype and NP matrix biosynthesis. Our preliminary study demonstrated that a high-magnitude compression (20% deformation) promotes NP cell senescence in a three-dimensional scaffold culture system. The aim of the present study was to investigate whether N-CDH-mediated signaling alleviates NP cell senescence under the above-mentioned high-magnitude compression. NP cells were transfected with recombinant lentiviral vectors to enhance N-CDH expression. All the transfected or un-transfected NP cells were seeded into the scaffolds and subjected to 20% deformation at a frequency of 1.0 Hz for 4 h once per day for 5 days. Results indicated that N-CDH overexpressed NP cells exhibited decreased senescence-associated β-galactosidase activity and downregulated expression levels of senescence-associated markers (p16 and p53). Furthermore, the N-CDH overexpressed NP cells exhibited increased cell proliferation potency, telomerase activity and matrix biosynthesis compared with NP cells without N-CDH overexpression under high-magnitude compression. Thus, N-CDH-mediated signaling contributes to the attenuation of NP cell senescence under high-magnitude compression.
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Affiliation(s)
- Ming Niu
- The Second Department of Surgery, Ganzhou People's Hospital, Zhangye, Gansu 734000, P.R. China
| | - Fei Ma
- The Second Department of Surgery, Ganzhou People's Hospital, Zhangye, Gansu 734000, P.R. China
| | - Jun Qian
- The First Department of Orthopaedic Surgery, Zhangye People's Hospital Affiliated to Hexi University, Zhangye, Gansu 734000, P.R. China
| | - Junwei Li
- The Second Department of Surgery, Ganzhou People's Hospital, Zhangye, Gansu 734000, P.R. China
| | - Tong Wang
- The Second Department of Surgery, Ganzhou People's Hospital, Zhangye, Gansu 734000, P.R. China
| | - Yuzhen Gao
- The Second Department of Surgery, Ganzhou People's Hospital, Zhangye, Gansu 734000, P.R. China
| | - Jian Jin
- Department of Spine Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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