Background: The octamer-binding transcription factor-4 (OCT4) is known as an established important regulator of pluripotency, as well as a genetic "master switch" in the self-renewal of embryonic stem and germ cells. , one of the three spliced variants of human OCT4, plays crucial roles in the regulation of pluripotency and stemness.
Objectives: The present study developed a transgenic mouse model containing an -expressing construct under the transcriptional direction of mouse mammary tumor virus promoter (pMMTV) to evaluate the role of OCT4B1 in the function of male germ cells in terms of fertility potential. Additionally, the effect of ectopic OCT4B1 overexpression on endogenous OCT4 expression was examined in mouse embryonic stem cells (mESCs).
Material And Methods: The construct was injected into the pronuclei of 0.5-day NMRI embryos. Transgenic mice were identified based on the PCR analysis of tail DNA. Further, Diff-Quik staining was applied to assess sperm morphology, while the other sperm parameters were analyzed through a conventional light microscopic evaluation according to World Health Organization (WHO) criteria. The fertility rate was scored by using in vitro frtilization (IVF) method. Furthermore, mESCs was electroporated with the -containing constructs, followed by analyzing through employing semi-quantitative RT-PCR and western blotting.
Results: The results demonstrated the changes in sperm morphology, as well as a statistically significant decrease in the other sperm parameters (count, viability, and motility) and fertility rate (p<0.05) in the transgenic mice compared with the control group. The assessment of the cause of the embryonic stem cell (ESC) death following transfection revealed a significant reduction in the endogenous OCT4 expression at both mRNA and protein levels in the transfected mESCs compared to the control ones.
Conclusion: In general, the results suggested a potential role of OCT4B1 in the spermatogenesis process. These results represented that the overexpression of OCT4B1 may induce its role in spermatogenesis and fertility rate by interfering endogenous OCT4 expression. However, further studies are required to clarify the mechanisms underlying OCT4B1 function.
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http://dx.doi.org/10.30498/ijb.2022.278266.3019 | DOI Listing |
Sci Rep
January 2025
Department of Obstetrics, Guangdong Provincial Key Laboratory of Major Obstetric Diseases, Guangdong Provincial Clinical Research Center for Obstetrics and Gynecology, Guangdong-Hong Kong-Macao Greater Bay Area Higher Education Joint Laboratory of Maternal-Fetal Medicine, The Third Affiliated Hospital, Guangzhou Medical University, Guangzhou, 510150, China.
The combined impact of concurrent primary Sjögren's syndrome (pSS) and autoimmune thyroid disease (AITD) on pregnancy outcomes remains underreported. A retrospective analysis was conducted on 115 pregnant patients diagnosed with pSS and delivering at the Third Affiliated Hospital of Guangzhou Medical University from January 2009 to July 2023. The effects of AITD on maternal and neonatal outcomes were examined and compared to a control group without AITD.
View Article and Find Full Text PDFBMJ Open
January 2025
Department of Community Medicine and Family Medicine, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India.
Background: The avoidable causes of infant mortality should be identified, and interventions should be made to improve the infant mortality rate. The cause of infant deaths should be assessed in both medical and social contexts.
Objectives: We aimed to determine the medical causes of infant mortality by verbal autopsy and its determinants in two rural blocks of the Khordha district of Odisha and assess the pathway of care and delay in seeking care for the illness preceding infant death using the three-delay model.
J Dr Nurs Pract
January 2025
Department of Nursing, Miami University, Oxford, OH, USA
Over 30% of births in the United States occur via cesarean section despite increased risks to the birthing person and neonate. Evidence-based nursing practice related to fetal monitoring, patient positioning, and management of the second stage of labor can decrease the incidence of cesarean birth. The objective is to decrease the cesarean birth rate by 3% in a Midwestern suburban hospital.
View Article and Find Full Text PDFRev Esp Cardiol (Engl Ed)
January 2025
Unidad de Salud Pública, Prevención y Promoción de la Salud, Área de Gestión Sanitaria Sur de Sevilla, Sevilla, España.
Introduction And Objectives: Infective endocarditis (IE) is a serious public health problem both in Spain and worldwide. This study aimed to analyze the trends in the incidence of IE in Spain from 1992 to 2021.
Methods: We used IE incidence data from the Global Health Data Exchange and population data from the Spanish National Statistics Institute to analyze changes in age-standardized incidence rates.
Sci Rep
January 2025
Intelligent Agricultural Machinery Equipment Engineering Laboratory, Harbin Cambridge University, Harbin, Heilongjiang, China.
Improved soil fertility to sustain crop productivity is important to enhance agroecosystem services. To address the low nutrient content, subsoil compaction, and poor root penetration in Planosol, a new machine was designed to improve these conditions. This machine integrates subsoil mixing and fertilizer application.
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