Journal article
Sensitivity of spermatogonia to irradiation varies with age in pre-pubertal ram lambs
Animal reproduction science, Vol.193, pp.58-67
06/2018
PMID: 29636209
Metrics
1 Record Views
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Abstract
Although germ cells from donor rams transplanted into irradiated recipient testes have produced donor derived offspring, efficiency is low. Further optimization of recipient irradiation protocols will add precision to the depletion of recipient spermatogonia prior to germ cell transplant. Three irradiation doses (9,12,15 Gy) were administered to ram lambs aged 14 weeks (Group 1) and 20 weeks (Group 2), then testicular biopsies were collected 1, 2 and 3 months after irradiation. At 1 month after irradiation of Group 1, only the largest dose (15 Gy) reduced spermatogonia numbers below 10% of non-irradiated controls, whereas in Group 2 lambs, each irradiation dose reduced spermatogonia below 10% of controls. In both Groups, fewer differentiated germ cells were present in seminiferous tubules compared to controls. At 2 months after irradiation, spermatogonia numbers in both Groups increased more than sixfold to be similar to controls, whereas fewer differentiated germ cells were present in the tubules of both Groups. At 3 months in Group 1, each irradiation dose reduced spermatogonia numbers to <30% of controls and fewer tubules contained differentiated germ cells. Lesser expression of spermatogonial genes, VASA and UCHL-1, was observed in the 15 Gy group. In Group 2, only 12 Gy treated tubules contained fewer spermatogonia. Knowledge of these subtle differences between age groups in the effect of irradiation doses on spermatogonia or differentiated germ cell numbers and the duration of recovery of spermatogonia numbers after irradiation will aid the timing of germ cell transplants into prepubertal recipient lambs.
Details
- Title
- Sensitivity of spermatogonia to irradiation varies with age in pre-pubertal ram lambs
- Creators
- J. Olejnik - University of New EnglandN. Suchowerska - University of SydneyM. Herrid - Commonwealth Scientific and Industrial Research OrganisationA. Jackson - Commonwealth Scientific and Industrial Research OrganisationM. Jackson - University of SydneyN.M. Andronicos - Commonwealth Scientific and Industrial Research OrganisationG.N. Hinch - University of New EnglandJ.R. Hill - Commonwealth Scientific and Industrial Research Organisation
- Publication Details
- Animal reproduction science, Vol.193, pp.58-67
- Publisher
- Elsevier B.V
- Identifiers
- 991013131701602368
- Copyright
- © 2018 Elsevier B.V. All rights reserved.
- Academic Unit
- Office of the Vice Chancellor
- Language
- English
- Resource Type
- Journal article