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farrukh S, Baig S, Hussain R, Imad R, kulsoom O, Yousaf Rana M. Identification of polymorphic alleles in TERC and TERT gene reprogramming the telomeres of newborn and legacy with parental health. Saudi J Biol Sci 2024; 31:103897. [PMID: 38192544 PMCID: PMC10772381 DOI: 10.1016/j.sjbs.2023.103897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 12/02/2023] [Accepted: 12/08/2023] [Indexed: 01/10/2024] Open
Abstract
Telomere and telomerase genes (TERC and TERT) highlighted many novel genetic polymorphisms related to common diseases. This study explored the polymorphic alleles of TERC and TERT gene in parents-newborn (triad) and its association with telomere length (TL) and parental diseases (mother: Gestational Diabetes Mellitus (GDM), Preeclampsia, fathers: Diabetes, Hypertension). In this cross-sectional study, the blood samples (n = 612) were collected from parents-newborn triad (204 each) for TL (T/S ratio) quantification by using qPCR, and gene (TERC and TERT) polymorphism was detected by Sanger sequencing. The correlation analysis was used to find an association between paternal TL (T/S ratio) and newborn TL. The multivariate linear regression was applied to determine the effect of parents genes and diseases on newborn TL. A positive association (r = 0.42,0.39) (p < 0.0001) among parents and newborn TL was observed. In the diseased group, both TERC (rs10936599) and TERT (rs2736100) genes had a high frequency of allele C in newborns (OR = 0.94, P = 0.90, OR = 4.24, P = 0.012). However, among parents, TERT gene [Mother CC (B = 0.575; P = 0.196), Father CC (B = -0.739; P = 0.071)] was found significant contributing factor for Newborn TL. Diseased parents with T/T and A/C genotypes had longer newborn TL (2.82 ± 2.43, p < 0.022; 1.80 ± 1.20, p < 0.00) than the C/C genotype. Therefore, the study, confirmed that major allele C of TERC and TERT genes is associated with smaller TL in diseased parents-newborns of the targeted population.
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Affiliation(s)
- Sadia farrukh
- Department of Biochemistry, Ziauddin University, Karachi, Pakistan
- Department of Community Health Sciences, The Agha Khan University, Karachi, Pakistan
| | - Saeeda Baig
- Department of Biochemistry, Ziauddin University, Karachi, Pakistan
| | - Rubina Hussain
- Department Gynecology and obstetrician, Ziauddin university and hospitals, Karachi, Pakistan
| | - Rehan Imad
- Department of Molecular medicine, Ziauddin University Karachi, Pakistan
| | - Ome kulsoom
- Department Gynecology and obstetrician, Ziauddin hospital, Karachi, Pakistan
| | - Mehreen Yousaf Rana
- Department Gynecology and obstetrician, Ziauddin hospital, Karachi, Pakistan
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Péntek S, Várnagy Á, Farkas B, Mauchart P, Gödöny K, Varjas T, Kőszegi T, Kaltenecker P, Jakabfi-Csepregi R, Kovács K, Bódis J, Sulyok E. Telomere Length and Telomerase Activity of Granulosa Cells and Follicular Fluid in Women Undergoing In Vitro Fertilization. Antioxidants (Basel) 2023; 12:antiox12020419. [PMID: 36829978 PMCID: PMC9952214 DOI: 10.3390/antiox12020419] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Revised: 02/05/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
This study aimed to evaluate the interrelationship between telomere length, telomerase activity and oxidative DNA damage in patients undergoing in vitro fertilization (IVF). This single-center, observational clinical study comprised 102 unselected, consecutive patients with various infertility diagnoses. Granulosa cells (GCs) and follicular fluid (FF) were analyzed simultaneously for telomere functions and for the marker of oxidative DNA damage, 8-hydroxy-2-deoxyguanosine (8-OHdG). An Absolute Human Telomere Lengths Quantification qPCR Assay kit and Telomerase Activity Quantification qPCR Assay kit (Nucleotestbio, Budapest, Hungary), as well as an 8-OHdG ELISA kit (Abbexa Ltd., Cambridge, United Kingdom) were used for analyses. Similar telomere lengths were found in GCs and FF, however telomerase activity was markedly depressed, while 8-OHdG levels were markedly elevated in FF compared with those in GCs (p < 0.01). Telomere lengths were independent of telomerase activity both in GCs and FF. However, GC 8-OHdG was inversely related to telomerase activity in GCs and FF (p < 0.05). Importantly, 8-OHdG levels both in GCs and FF had significant negative impact on the number of the retrieved and MII oocytes (p < 0.01), whereas FF 8-OHdG was negatively related further to the number of fertilized oocytes and blastocysts (p < 0.01). In conclusion, we could not confirm the direct association of telomere function and reproductive potential. However, oxidative DNA damage, as mainly reflected by 8-OHdG, adversely affected early markers of IVF outcome and clinical pregnancies.
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Affiliation(s)
- Sándor Péntek
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Obstetrics and Gynecology, University of Pecs Medical School, 7624 Pécs, Hungary
| | - Ákos Várnagy
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Obstetrics and Gynecology, University of Pecs Medical School, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Bálint Farkas
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Obstetrics and Gynecology, University of Pecs Medical School, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
- Correspondence: ; Tel.: +36-72-536-360 (ext. 0827); Fax: +36-72-536-3
| | - Péter Mauchart
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Obstetrics and Gynecology, University of Pecs Medical School, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Krisztina Gödöny
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Obstetrics and Gynecology, University of Pecs Medical School, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Tímea Varjas
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Public Health Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
| | - Tamás Kőszegi
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary
| | - Péter Kaltenecker
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary
| | - Rita Jakabfi-Csepregi
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary
| | - Kálmán Kovács
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Obstetrics and Gynecology, University of Pecs Medical School, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - József Bódis
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Department of Obstetrics and Gynecology, University of Pecs Medical School, 7624 Pécs, Hungary
- MTA-PTE Human Reproduction Scientific Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Endre Sulyok
- National Laboratory on Human Reproduction, University of Pécs, 7622 Pécs, Hungary
- Faculty of Health Sciences, University of Pécs, 7621 Pécs, Hungary
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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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Needham BL, Straight B, Hilton CE, Olungah CO, Lin J. Family socioeconomic status and child telomere length among the Samburu of Kenya. Soc Sci Med 2021; 283:114182. [PMID: 34225037 DOI: 10.1016/j.socscimed.2021.114182] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 05/27/2021] [Accepted: 06/25/2021] [Indexed: 01/08/2023]
Abstract
Previous research in high-income countries suggests that children from families with lower socioeconomic status (SES) tend to have shorter telomere length - a biomarker of stress and cell aging - than children from families with greater social and economic resources. However, little is known about predictors of child telomere length in low-income settings. Data for the current study are from a sample of 214 Samburu children aged 1-9 years. The Samburu are semi-nomadic pastoralists who live in the Rift Valley of north-central Kenya. Samburu livelihood is based primarily on livestock, and polygynous marriage is common. Drawing on prior ethnographic research, we measured 14 culturally relevant indicators of family SES, including mother's education, head of household's education, whether the child is currently attending school, household spending, mother's employment history, head of household's employment history, mother's perceived wealth, whether the child lives in a modern house, livestock holdings (total, cows, sheep/goats, and camels), mother's wife number, and whether the child lives in a polygynous household. Telomere length was measured in salivary DNA by the quantitative polymerase chain reaction (qPCR) method. Using latent class analysis, we identified four groups of children that are similar based on the 14 indicators of family SES: Lower SES; Middle SES, Traditional; Middle SES, Modern; and Higher SES. SES classes were not significantly associated with child telomere length. In models examining individual indicators of SES, we found that telomere length was 0.57 standard deviations greater for children who lived in families in the lowest quartile of total livestock holdings compared to those in the highest quartile (b = 0.57, p = 0.03). While additional research is needed to identify the mechanisms underlying this counterintuitive finding, the current study highlights the importance of cultural context in shaping the social gradient in health.
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Affiliation(s)
- Belinda L Needham
- Department of Epidemiology and Center for Social Epidemiology and Population Health, University of Michigan, USA.
| | - Bilinda Straight
- Department of Gender and Women's Studies, Western Michigan University, USA
| | - Charles E Hilton
- Department of Anthropology, University of North Carolina, Chapel Hill, USA
| | | | - Jue Lin
- Department of Biochemistry and Biophysics, University of California, San Francisco, USA
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Rej PH, Bondy MH, Lin J, Prather AA, Kohrt BA, Worthman CM, Eisenberg DTA. Telomere length analysis from minimally-invasively collected samples: Methods development and meta-analysis of the validity of different sampling techniques: American Journal of Human Biology. Am J Hum Biol 2020; 33:e23410. [PMID: 32189404 DOI: 10.1002/ajhb.23410] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 02/07/2020] [Accepted: 02/29/2020] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVES Telomeres are the protective caps of chromosomes. They shorten with cell replication, age, and possibly environmental stimuli (eg, infection and stress). Short telomere length (TL) predicts subsequent worse health. Although venous whole blood (VWB) is most commonly used for TL measurement, other, more minimally invasive, sampling techniques are becoming increasingly common due to their field-friendliness, allowing for feasible measurement in low-resource contexts. We conducted statistical validation work for measuring TL in dried blood spots (DBS) and incorporated our results into a meta-analysis evaluating minimally invasive sampling techniques to measure TL. METHODS We isolated DNA extracts from DBS using a modified extraction protocol and tested how they endured different shipping conditions and long-term cryostorage. We then included our in-house DBS TL validation statistics (correlation values with VWB TL and age) in a series of meta-analyses of results from 24 other studies that published similar associations for values between TL measured in DBS, saliva, and buccal cells. RESULTS Our modified DBS extraction technique produced DNA yields that were roughly twice as large as previously recorded. Partially extracted DBS DNA was stable for 7 days at room temperature, and still provided reliable TL measurements, as determined by external validation statistics. In our meta-analysis, DBS TL had the highest external validity, followed by saliva, and then buccal cells-possibly reflecting similarities/differences in cellular composition vs VWB. CONCLUSIONS DBS DNA is the best proxy for VWB from the three minimally-invasively specimen types evaluated and can be used to expand TL research to diverse settings and populations.
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Affiliation(s)
- Peter H Rej
- Department of Anthropology, University of Washington, Seattle, Washington, USA
| | - Madison H Bondy
- Department of Anthropology, Emory University, Atlanta, Georgia, USA
| | - Jue Lin
- Department of Biochemistry and Biophysics, University of California, San Francisco, California, USA
| | - Aric A Prather
- Department of Psychiatry, University of California, San Francisco, California, USA
| | - Brandon A Kohrt
- Department of Psychiatry and Behavioral Services, George Washington University, Washington, District of Columbia, USA
| | - Carol M Worthman
- Department of Anthropology, Emory University, Atlanta, Georgia, USA
| | - Dan T A Eisenberg
- Department of Anthropology, University of Washington, Seattle, Washington, USA.,Center for Studies in Demography and Ecology, Seattle, Washington, USA
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