Sperm histone mediated epigenetic inheritance
Bibliographic record
Abstract
During spermatogenesis, majority of the histones are replaced by protamines to enable the compaction of the sperm chromatin for efficient delivery into the oocyte. Even after the gross histone replacement, some histones are retained in the sperm ranging from 1% to 15% across mammalian species. The post-translational modifications (PTMs), present on the retained histones of the sperm regulate the embryonic development, post fertilization, making them the suitable candidate for paternal epigenetic inheritance. The retained sperm histones are shown to be distributed on the CpG sites of genes related to embryonic development and also on the gene desert regions, however, they vary in their PTM marks. Further, the exact mechanism for histone retention remains elusive. Also, the mechanism for specific localization and crosstalk of sperm retained histone with DNA methylation and non-coding RNA remains elusive. In this review, we discuss the possible mechanisms of histone retention, their differential localization into euchromatic and heterochromatic chromatin domains and the histone-driven epigenetic inheritance in mammalian sperm. The mechanistic insights of histone to protamine transition are also explored. Further, the PTMs on histone and protamines and their roles in histone-mediated epigenetic inheritance is also explored.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".