Depletion of Endogenous Germ Cells in Male Pigs and Goats in Preparation for Germ Cell Transplantation
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The efficiency of germ cell transplantation, the procedure of transferring germ cells from a donor male into the testes of recipient males, can be greatly increased by reduction of endogenous germ cells in recipient animals. To develop effective methods for suppression of endogenous spermatogenesis in potential pig and goat recipients, we either administered busulfan to pregnant sows or irradiated the testes of immature goats. Piglets from sows treated twice with busulfan (7.5 mg/kg) at days 98 and 108 of gestation showed reduced gonocyte numbers at 2, 4, and 8 weeks of age and reduced initiation of spermatogenesis at 16 weeks of age. For goats, groups of 3 kids at 1, 5, or 9.5 weeks of age received fractionated irradiation of the testes with 3 doses of 2 Gy on 3 consecutive days. At 2 months after irradiation, 5%-10% of seminiferous tubule cross sections contained pachytene spermatocytes, compared with 50%-100% in controls. At 3 months after irradiation, spermatozoa appeared in 20% of tubule cross sections in all treated goats and in 100% of tubules in control goats. By 6 months after irradiation, spermatogenesis had recovered in 60% of tubules in goats treated at 5 or 9.5 weeks of age but in only 29% of tubules after treatment at 1 week of age. Therefore, late gestation in utero treatment of pigs with low doses of busulfan and testicular irradiation of goats at 1 week of age will result in a reduction in the endogenous germ cell population that could facilitate donor cell colonization after germ cell transplantation.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it