Cryptorchid Human Testis after HCG Treatment: Histological Study on Sertoli Cells

1979 ◽  
Vol 5 (3) ◽  
pp. 195-198 ◽  
Author(s):  
Massimo Re ◽  
Francesco Micali ◽  
Tommaso Racheli ◽  
Massimo Iannitelli
Keyword(s):  
Sertoli Cells ◽  
Histological Study ◽  
Human Testis

scholarly journals Exogenous Gonadotrophin Stimulation Induces Partial Maturation of Human Sertoli Cells in a Testicular Xenotransplantation Model for Fertility Preservation

2020 ◽  
Vol 9 (1) ◽  
pp. 266 ◽  
Author(s):  
Marsida Hutka ◽  
Lee B. Smith ◽  
Ellen Goossens ◽  
W. Hamish B. Wallace ◽  
Jan-Bernd Stukenborg ◽  
...  
Keyword(s):  
Sertoli Cell ◽  
Sertoli Cells ◽  
Connexin 43 ◽  
Xenograft Model ◽  
Cell Maturation ◽  
Human Testis ◽  
Testicular Development ◽  
Future Fertility ◽  
And Function ◽  
Testis Tissue

The future fertility of prepubertal boys with cancer may be irreversibly compromised by chemotherapy and/or radiotherapy. Successful spermatogenesis has not been achieved following the xenotransplantation of prepubertal human testis tissue, which is likely due to the failure of somatic cell maturation and function. We used a validated xenograft model to identify the factors required for Leydig and Sertoli cell development and function in immature human testis. Importantly, we compared the maturation status of Sertoli cells in xenografts with that of human testis tissues (n = 9, 1 year-adult). Human fetal testis (n = 6; 14–21 gestational weeks) tissue, which models many aspects of prepubertal testicular development, was transplanted subcutaneously into castrated immunocompromised mice for ~12 months. The mice received exogenous human chorionic gonadotropin (hCG; 20IU, 3×/week). In xenografts exposed continuously to hCG, we demonstrate the maintenance of Leydig cell steroidogenesis, the acquisition of features of Sertoli cell maturation (androgen receptor, lumen development), and the formation of the blood–testis barrier (connexin 43), none of which were present prior to the transplantation or in xenografts in which hCG was withdrawn after 7 months. These studies provide evidence that hCG plays a role in Sertoli cell maturation, which is relevant for future investigations, helping them generate functional gametes from immature testis tissue for clinical application.

scholarly journals Ontogenetic Pattern of Thyroid Hormone Receptor Expression in the Human Testis

2000 ◽  
Vol 85 (9) ◽  
pp. 3453-3457 ◽  
Author(s):  
Emmanuele A. Jannini ◽  
Anna Crescenzi ◽  
Nadia Rucci ◽  
Emiliano Screponi ◽  
Eleonora Carosa ◽  
...  
Keyword(s):  
In Situ Hybridization ◽  
Thyroid Hormone ◽  
Sertoli Cells ◽  
Pcr Amplification ◽  
Receptor Expression ◽  
Northern Analysis ◽  
Human Testis ◽  
Adult Testis ◽  
Maximal Expression

Abstract We studied the spatiotemporal distribution of thyroid hormone nuclear receptors (TRs) α1 and α2 and β messenger RNA (mRNA) levels in normal human testicular tissue during development and in adulthood. Nonpathological specimens from five aborted fetuses (17 and 23 weeks of gestation, three and two cases, respectively) and from four patients undergoing orchiectomy (18 months old and 38-, 42-, and 52-yr-old, respectively) were analyzed by Northern blot, semiquantitative RT-PCR amplification using DNA sequences or specifically designed primers for the TR isoforms, and in situ hybridization. By using PCR amplification, we found that TRα1 and TRα2 are both expressed at different levels in fetal and adult testis. At all ages TRα2 is found at higher levels. Northern analysis showed hybridization signals corresponding to the expression of TRα2 and TRα1 in a ratio that increased from 2.6 at 17 weeks of gestation to 12.0 in adulthood. In fact, the expression of TRα1 dramatically decreased throughout development, being faintly detectable in the adult testis. Expression of TRβ was not detected at any age studied. This finding was further confirmed by PCR, which did not amplify TRβ either in fetal or in adult testis mRNAs. In situ hybridization studies showed the absence of TRβ and that TRα1 and TRα2 colocalized in Sertoli cells of prepubertal testis, whereas germ and interstitial cells appeared devoid of TR mRNA signals. From these results it can be concluded that the human testis exclusively expresses TRα, which is localized in Sertoli cells, TRβ being always undetectable. Fetal and prepubertal ages represent the period of maximal expression of TRα1 and TRα2. Theα 2/α1 ratio rises dramatically after development. These results confirm a critical window for the action of thyroid hormone in human testis, in the period of maximal expression of T3 binding isoform TRα1, and may account for the macroorchidism without virilization occurring when hyposecretion of thyroid hormones occurs before puberty.

scholarly journals scRNA-seq Profiling of Human Testes Reveals the Presence of ACE2 Receptor, a Target for SARS-CoV-2 Infection, in Spermatogonia, Leydig and Sertoli Cells

2020 ◽  
Author(s):  
Zhengpin Wang ◽  
Xiaojiang Xu
Keyword(s):  
Sertoli Cells ◽  
Sequence Similarity ◽  
Male Gamete ◽  
Cell Junction ◽  
Human Testis ◽  
High Sequence Similarity ◽  
Angiotensin Converting Enzyme 2 ◽  
Potential Target ◽  
Novel Coronavirus ◽  
Go Terms

In December 2019, a novel coronavirus (SARS-CoV-2) was identified in patients with pneumonia (called COVID-19) in Wuhan, Hubei Province, China. SARS-CoV-2 shares high sequence similarity and uses the same cell entry receptor, angiotensin-converting enzyme 2 (ACE2), as does severe acute respiratory syndrome coronavirus (SARS-CoV). Several studies have provided bioinformatic evidence of potential routes for SARS-CoV-2 infection in respiratory, cardiovascular, digestive and urinary systems. However, whether the reproductive system is a potential target of SARS-CoV-2 infection has not been determined. Here, we investigate the expression pattern of ACE2 in adult human testis at the level of single-cell transcriptomes. The results indicate that ACE2 is predominantly enriched in spermatogonia, Leydig and Sertoli cells. Gene ontology analyses indicate that GO categories associated with viral reproduction and transmission are highly enriched in ACE2-positive spermatogonia while male gamete generation related terms are down-regulated. Cell-cell junction and immunity related GO terms are increased in ACE2-positive Leydig and Sertoli cells, but mitochondria and reproduction related GO terms are decreased. These findings provide evidence that human testes are a potential target of SARS-CoV-2 infection which may have significant impact on our understanding of the pathophysiology of this rapidly spreading disease.

scholarly journals Lack of Androgen Receptor Expression in Sertoli Cells accounts for the Absence of Anti-Mullerian Hormone Repression during Early Human Testis Development

2009 ◽  
Vol 23 (5) ◽  
pp. 735-735
Author(s):  
Kahina Boukari ◽  
Geri Meduri ◽  
Sylvie Brailly-Tabard ◽  
Jean Guibourdenche ◽  
Maria Luisa Ciampi ◽  
...  
Keyword(s):  
Androgen Receptor ◽  
Sertoli Cells ◽  
Receptor Expression ◽  
Androgen Receptor Expression ◽  
Human Testis ◽  
Testis Development ◽  
Early Human

1 XENOGRAFTING OF ADULT MAMMALIAN TESTIS TISSUE

2007 ◽  
Vol 19 (1) ◽  
pp. 119
Author(s):  
L. Arregui ◽  
R. Rathi ◽  
W. Zeng ◽  
A. Honaramooz ◽  
M. Gomendio ◽  
...  
Keyword(s):  
Cell Differentiation ◽  
Germ Cell ◽  
Germ Cells ◽  
Sertoli Cells ◽  
Human Testis ◽  
Seminiferous Tubules ◽  
Donor Tissue ◽  
Germ Cell Differentiation ◽  
Sexually Mature ◽  
Testis Tissue

Testis tissue grafting presents an option for preservation of genetic material when sperm recovery is not possible. Grafting of testis tissue from sexually immature males to immunodeficient mice results in germ cell differentiation and production of fertilization-competent sperm from different mammalian species (Honaramooz et al. 2002 Nature 418, 778–781). However, the efficiency of testis tissue xenografting from adult donors has not been critically evaluated. Spermatogenesis was arrested at meiosis in grafts from mature horses (Rathi et al. 2006 Reproduction 131, 1091–1098) and hamsters (Schlatt et al. 2002 Reproduction 124, 339–346), and no germ cell differentiation occurred in xenografts of adult human testis tissue (Schlatt et al. 2006 Hum. Reprod. 21, 384–389). The objective of this study was to investigate survival and germ cell differentiation of testis xenografts from sexually mature donors of different species. Small fragments of testis tissue from 10 donor animals of 5 species were grafted under the back skin of immunodeficient, castrated male mice (n = 37, 2–6/donor). Donors were pig (8 months old), goat (18 months old and 4 years old) (n = 2), bull (3 years old), donkey (13 months old), and rhesus monkey (3, 6, 11, and 12 years old). At the time of grafting, donor tissue contained elongated spermatids, albeit to different degrees (>75% of seminiferous tubules in testis tissue from pig, goat, bull, and 6–12-year-old monkeys, and 33 or 66% of tubules in tissue from donkey or 3-year-old monkey, respectively). Grafts were recovered <12 weeks (n = 14 mice), 12–24 weeks (n = 16 mice), and >24 weeks (n = 7 mice) after grafting and classified histologically as completely degenerated (no tubules found), degenerated tubules (only hyalinized seminiferous tubules observed), or according to the most advanced type of germ cell present. Grafts from pig, goat, bull, and 6–12-year-old monkeys contained >60% degenerated tubules or were completely degenerated at all time points analyzed. In contrast, in grafts from the 3-year-old monkey, only 18% of tubules were degenerated, 14% contained Sertoli cells only, 64% contained meiotic, and 4% haploid germ cells at 24 weeks after grafting. Similarly, donkey testis grafts recovered 12–24 weeks after grafting contained <2% degenerated tubules, 46% of tubules had Sertoli cells only, 45% contained meiotic, and 7% haploid germ cells. These results show that survival and differentiation of germ cells in testis grafts from sexually mature mammalian donors is poor. However, better graft survival and maintenance of spermatogenesis occurred in donor tissue from donkey and 3-year-old monkey that were less mature at the time of grafting. Therefore, species and age-related differences appear to exist with regard to germ cell survival and differentiation in xenografts from adult donors. This work was supported by USDA/CSREES 03-35203-13486, NIH/NCRR 5-R01-RR17359-05, the Spanish Ministry of Education, and Science (BES-2004-4112).

scholarly journals Fertility Preservation in Childhood Cancer: Endocrine Activity in Prepubertal Human Testis Xenografts Exposed to a Pubertal Hormone Environment

Cancers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2830
Author(s):  
Marsida Hutka ◽  
Prashant Kadam ◽  
Dorien Van Saen ◽  
Natalie Z. M. Homer ◽  
Jaime Onofre ◽  
...  
Keyword(s):  
Childhood Cancer ◽  
Fertility Preservation ◽  
Sertoli Cells ◽  
Connexin 43 ◽  
Endocrine Function ◽  
Plasma Testosterone ◽  
Human Testis ◽  
Endocrine Activity ◽  
Long Term Treatment ◽  
Testis Tissue

Survivors of childhood cancer are at risk for long-term treatment-induced health sequelae, including gonadotoxicity and iatrogenic infertility. At present, for prepubertal boys there are no viable clinical options to preserve future reproductive potential. We investigated the effect of a pubertal induction regimen with gonadotrophins on prepubertal human testis xenograft development. Human testis tissue was obtained from patients with cancer and non-malignant haematological disorders (n = 6; aged 1–14 years) who underwent testis tissue cryopreservation for fertility preservation. Fresh and frozen-thawed testis fragments were transplanted subcutaneously or intratesticularly into immunocompromised mice. Graft-bearing mice received injections of vehicle or exogenous gonadotrophins, human chorionic gonadotrophin (hCG, 20 IU), and follicle-stimulating hormone (FSH, 12.5 IU) three times a week for 12 weeks. The gross morphology of vehicle and gonadotrophin-exposed grafts was similar for both transplantation sites. Exposure of prepubertal human testis tissue xenografts to exogenous gonadotrophins resulted in limited endocrine function of grafts, as demonstrated by the occasional expression of the steroidogenic cholesterol side-chain cleavage enzyme (CYP11A1). Plasma testosterone concentrations (0.13 vs. 0.25 ng/mL; p = 0.594) and seminal vesicle weights (10.02 vs. 13.93 mg; p = 0.431) in gonadotrophin-exposed recipient mice were comparable to vehicle-exposed controls. Regardless of the transplantation site and treatment, initiation and maintenance of androgen receptor (AR) expression were observed in Sertoli cells, indicating commitment towards a more differentiated status. However, neither exogenous gonadotrophins (in castrated host mice) nor endogenous testosterone (in intact host mice) were sufficient to repress the expression of markers associated with immature Sertoli cells, such as anti-Müllerian hormone (AMH) and Ki67, or to induce the redistribution of junctional proteins (connexin 43, CX43; claudin 11, CLDN11) to areas adjacent to the basement membrane. Spermatogonia did not progress developmentally but remained the most advanced germ cell type in testis xenografts. Overall, these findings demonstrate that exogenous gonadotrophins promote partial activation and maturation of the somatic environment in prepubertal testis xenografts. However, alternative hormone regimens or additional factors for pubertal induction are required to complete the functional maturation of the spermatogonial stem cell (SSC) niche.

Testicular gonadotrophins and their receptors in human cryptorchidism as revealed by immunohistochemistry and radioreceptor assay

1986 ◽  
Vol 111 (1) ◽  
pp. 128-132 ◽  
Author(s):  
Outi Hovatta ◽  
I. Huhtaniemi ◽  
T. Wahlström
Keyword(s):  
Sertoli Cell ◽  
Sertoli Cells ◽  
Leydig Cells ◽  
Radioreceptor Assay ◽  
Human Testis ◽  
Immunoperoxidase Technique ◽  
Fsh Receptor ◽  
Lh Receptor ◽  
And Control ◽  
Testicular Macrophages

Abstract. The localisation of endogenous FSH and LH was studied in 4 inguinal adult human testes by the immunoperoxidase technique utilising antisera against the β-subunits of human FSH and LH. The content of available FSH and LH receptors was determined by radioreceptor assay. The Sertoli cells and about 10% of cells in the intersitium the Leydig cells, possibly the testicular macrophages, were similarly FSH-positive in cryptorchidism and control testes. The FSH receptor levels per testis were significantly lower in cryptorchidism than in control testes. Also the localisation of LH in Leydig cells in cryptorchidism was similar to the control testes, but the LH receptor level was significantly lower. These data bring further evidence for Leydig and Sertoli cell malfunction in the inguinal human testis.

GLYCOGEN IN THE NORMAL HUMAN TESTIS: A HISTOCHEMICAL AND HISTOENZYMATIC STUDY

1969 ◽  
Vol 43 (4) ◽  
pp. 499-NP ◽  
Author(s):  
A. FABBRINI ◽  
M. RE ◽  
C. CONTI
Keyword(s):  
Sertoli Cells ◽  
Sexual Maturation ◽  
Normal Subjects ◽  
Human Testis ◽  
Normal Human

SUMMARY Histological and histochemical investigations were carried out on the testes of normal subjects in order to define the distribution of glycogen and some related enzymes. Intratubular glycogen is abundant in the prepubertal stage; it diminishes strikingly with the beginning of puberty, reappears during the period of complete sexual maturation, and the highest increase is found in the tubules in involution. Glycogen is abundant at some stages of spermatogenesis and almost completely absent in others. Glycogen is mainly, but not exclusively, localized in the Sertoli cells. 1–4 Amylophosphorylase and 1–4, 1–6 transglucosidase are present in the tubule as well as in some extratubular structures. It is not possible to demonstrate the presence of either UDPG-glycogen transferase or glucose-6-phosphatase.

Sign in / Sign up

Export Citation Format

Share Document