Effects of Chemotherapeutic Agents for Testicular Cancer on the Male Rat Reproductive System, Spermatozoa, and Fertility
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
Testicular cancer is the most common cancer affecting men of reproductive age. Advances in treatment of the disease, which include the coadministration of bleomycin, etoposide, and cis-platinum (BEP), have brought the cure rate to over 90%. This high cure rate, coupled with the young age of patients, makes elucidation of the impact of the treatment on reproductive function, fertility, and progeny outcome increasingly important. The goal of this study was to determine the effects of BEP, in doses analogous to those given to humans, on the male reproductive system, spermatozoa, fertility, and progeny outcome in an animal model. Male Sprague-Dawley rats were treated daily with BEP for 3 cycles of 3 weeks each, for a total of 9 weeks. After 6 and 9 weeks, males were mated to 2 groups of untreated females. BEP treatment resulted in decreases in testicular and epididymal weights of 52% and 28%, respectively, when compared to control. Decreased testis and epididymis weights were accompanied by impairment of spermatogenesis and by a decrease in spermatozoal count of nearly 90% (11.9 x 10(7) spermatozoa per caput epididymidis in control vs 1.65 x 10(7) in BEP-treated rats). The percent of motile spermatozoa in the treated rats was more than 30% lower than in controls. Defects in the flagella of spermatozoa increased by more than twofold in the midpiece, and by more than sixfold in the principal piece. Paternal BEP treatment, for either 6 or 9 weeks, did not affect fertility, pre- or postimplantation loss, litter size, or sex ratio among progeny on gestation day 21. In contrast, among the pregnancies allowed to proceed to delivery, a significant number of pups sired by males treated with BEP for 9 weeks died between birth and postnatal day 2; this was not observed in pups sired by males treated for 6 weeks. Markers of postnatal development were not affected in the surviving offspring from either group. Thus, despite the dramatic effects of the testicular cancer drug regimen on spermatogenesis, the numbers of spermatozoa, and their motility and morphology, male rats were fertile. While fetal development was apparently normal, early postnatal mortality, which may be associated with a delay in parturition, was elevated among the progeny sired by males exposed to BEP for 9 weeks.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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