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- W4283524465 abstract "The busulfan, an alkylating agent, suppresses endogenous spermatogenesis in recipient testes. However, considering a wide variation in the effects of busulfan among animal species, its dosage and route of infusion need optimization to prepare effective and safe recipients. Thus, the current study aimed to create a suitable recipient goat model for germ cell (Gc) transplantation through a single intra-testicular (i.t.) busulfan infusion under ultrasonographic (USG) guidance. As observed through the infusion of trypan blue under USG guidance into mediastinum testis (MT) of pre-pubertal Barbari bucks, 3-5 mL of trypan blue solution could fill almost 80% of seminiferous tubules. Thereafter, in Experiment-1, the effect of different busulfan doses (mg/kg) i.e. 0 [negative control, Group (Gr) 1; 0 mg/kg-MT], 1 (Gr 2; 1 mg/kg-MT), 2 (Gr 3; 2 mg/kg-MT), and 3 (Gr 4; 3 mg/kg-MT) were studied. Further, in Experiment-2, sterilizing effects of busulfan infusion through two different routes [MT or cavum vaginale (CV)] were compared. Following i.t. busulfan treatment, no adverse physiological effects or body weight loss were detected. The histological analyses demonstrate a dose-dependent depletion of Gc with almost complete loss of Gc and spermatogenic activities in Gr 3 and 4, and extensive fibrosis in Gr 4. A considerable suppression of spermatogenesis marked with devoid of endogenous spermatogonial population and absence of significant (P > 0.05) effect on key hematological variables were observed in 2 mg/kg-MT Gr. These findings coupled with the results of significant (P < 0.05) down-regulation of marker genes of undifferentiated spermatogonia (THY-1 and PLZF), Gc pluripotency (UCHL-1, OCT-4, and DDX-4), and adhesion (E-cadherin and β-integrin); up-regulation of apoptotic genes (ID - 4 and BCL-6), and unchanged expression of Sertoli cell marker (vimentin), confirmed the safe and efficient depletion of endogenous Gc in 2 mg/kg-MT Gr. Furthermore, the effect of busulfan infusion on scrotal-testicular biometry, endocrine variables (plasma cortisol and testosterone), and Gc removal was more evident when busulfan was infused into MT than into CV. Overall, the results demonstrated that 2.0 mg/kg is an optimal single dose of busulfan when infused into the MT under USG guidance for the preparation of pre-pubertal recipient bucks. Overall, this study provides a basis to prepare suitable recipients through providing an available niche for efficient Gc transplantation in goats." @default.
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- W4283524465 date "2022-09-01" @default.
- W4283524465 modified "2023-09-29" @default.
- W4283524465 title "Establishment of effective and safe recipient preparation for germ-cell transplantation with intra-testicular busulfan treatment in pre-pubertal Barbari goats" @default.
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- W4283524465 doi "https://doi.org/10.1016/j.theriogenology.2022.06.027" @default.
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