The male germ line in mammals is composed of self-renewing cells, spermatogonia, the meiotic spermatocytes and spermiogenic spermatids. Identification of these cell stages in vitro has been problematic. Transgenic animals expressing a marker gene with a promoter specific to certain cell stages in the testis would be a useful approach to identifying these cells in a viable state. Towards this end, we have produced transgenic pigs expressing mitochondrial localized enhanced yellow fluorescent protein (EYFP-mito) under control of the germ cell specific Stimulated by Retinoic Acid 8 (Stra8) promoter. Stra8 has been shown to be expressed in pre-meiotic germ cells of mice. Twelve clones harboring the Stra8-EYFP-mito transgene were produced. Analysis by Western blot indicated that expression of the transgene was limited to testicular tissue in the transgenic pigs. Single cells and seminiferous tubules were cultured in vitro and subsequently examined with epifluorescent microscopy. Expression of EYFP was noted in cells cultured for up to 5 days. Both EYFP-mito and STRA8 antibodies were shown to bind and co-localize in seminiferous tubule cells in whole mounts and in histological sections. EYFP-mito in the transgenic pigs co-localized with the endogenous stem cell marker, NANOG. Expression of the Stra8-EYFP transgene in spermatogenic cells indicates that these pigs will be useful by providing labelled cells for use in such technologies such as germ cell transplantation and in vitro spermatogenic studies.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11248-011-9542-6 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Generation of a human induced pluripotent stem cell (iPSC) line ERPLi004-A from an Alpha-1 antitrypsin deficiency (AATD) patient with SERPINA1 mutation.
Stem Cell Res
January 2025
The University of Trans-Disciplinary Health Sciences and Technology, Bengaluru 560064, India; Eyestem Research, Centre for Cellular and Molecular Platforms (C-CAMP), Bengaluru 560065, India. Electronic address:
Alpha-1 antitrypsin deficiency (AATD) is an autosomal disorder that causes liver and lung disease. The risk of developing lung emphysema, chronic obstructive pulmonary disorder and liver cirrhosis is observed in >75 % people affected with a homozygous mutation. Here, we describe the generation of an induced pluripotent stem cell (iPSC) line from peripheral blood mononuclear cells (PBMC) isolated from a AATD patient using non viral and non-integrating episomal vectors.
View Article and Find Full Text PDFChronic unpredictable stress exposure disrupts testicular function by modulating germ cell-junctional dynamics and Nrf2/HO-1/IKKβ/NF-κB pathway.
Reprod Toxicol
January 2025
Male Reproductive Physiology Lab., Department of Zoology, Institute of Science, Banaras Hindu University, Varanasi-221005 (UP), India. Electronic address:
The unpredictable nature of stress complicates understanding its relationship with male infertility. In this study, we investigated testicular germ cell and junctional dynamics in male mice following exposure to chronic unpredictable stress (CUS). Adult Parkes male mice were exposed to CUS for 35 days (one complete spermatogenic cycle), with a random stressor (restraint stress, water deprivation, food deprivation, light flashing, wet bedding, cage shaking, or cage tilting) applied once per day in an intermittent and unpredictable manner to avoid repeating the same stimulus on consecutive days.
View Article and Find Full Text PDFA tale of two tissues: Patterning of the epidermis through morphogens and their role in establishing tracheal system organization.
Cells Dev
January 2025
Departamento de Biología Celular y Fisiología, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de Mexico, Mexico. Electronic address:
Throughout embryonic development, cells respond to a diverse set of signals and forces, making individual or collective decisions that drive the formation of specialized tissues. The development of these structures is tightly regulated in space and time. In recent years, the possibility that neighboring tissues influence one another's morphogenesis has been explored, as some of them develop simultaneously.
View Article and Find Full Text PDFGeneration of two induced pluripotent stem cell lines from Loeys-Dietz syndrome patients carrying heterologous mutation of TGFBR1.
Stem Cell Res
January 2025
Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305, USA; Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA. Electronic address:
Loeys-Dietz Syndrome (LDS) is a rare autosomal dominant connective tissue disorder characterized by vascular aneurysms, arterial dissections, and distinct craniofacial and skeletal anomalies. This study focuses on generating and characterizing two induced pluripotent stem cell (iPSC) lines derived from LDS patients with distinct mutations in the TGFBR1 gene. These two iPSC lines were found to display characteristic iPSC morphology, strong expression of pluripotency markers, typical karyotypes, and the capacity for differentiation into the three germ layers.
View Article and Find Full Text PDFIdentification of Intracranial Germ Cell Tumors Based on Facial Photos: Exploratory Study on the Use of Deep Learning for Software Development.
J Med Internet Res
January 2025
Department of Radiation Oncology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China.
Background: Primary intracranial germ cell tumors (iGCTs) are highly malignant brain tumors that predominantly occur in children and adolescents, with an incidence rate ranking third among primary brain tumors in East Asia (8%-15%). Due to their insidious onset and impact on critical functional areas of the brain, these tumors often result in irreversible abnormalities in growth and development, as well as cognitive and motor impairments in affected children. Therefore, early diagnosis through advanced screening techniques is vital for improving patient outcomes and quality of life.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!