Cadmium as an Endocrine Disruptor in the Reproductive System
Bibliographic record
Abstract
Cadmium is a heavy metal that has no known beneficial biological role. Although naturally occurring, it owes its presence in todays environment mainly to contamination from consumer goods (electric batteries, paints, etc.), industrial wastes, and soil fertilizers. Cadmium is a constituent of foods (seafood, grains, vegetables) and tobacco smoke, which are its main sources of exposure to the general population. Human exposure has been linked to a vast array of ill effects ranging from those affecting lung, kidney and bone, to those affecting reproductive organs and specific cell functions. By virtue of its demonstrated capacity to alter the rates of ovarian and placental steroidogenesis, thereby adversely impacting normal reproduction in both humans and animals, cadmium has been added to the list of acknowledged endocrine disrupting chemicals (EDCs). Extensive evidence suggests direct effects on specific components of the steroidogenic pathway, including the low density lipoprotein (LDL)-cholesterol receptor and P450 side chain cleavage enzyme. In addition to exerting its effects via both transcriptional and post-transcriptional mechanisms, cadmium may also regulate hormone binding and intracellular second messenger pathways. Women may be at increased risk for the reproductive anomalies associated with exposure and, as demonstrated in numerous studies, the metal may also function as a potent nonsteroidal agent; a xenoestrogen, that can mimic or block the effects of endogenous estrogens. The effects of cadmium on reproduction, combined with its abundance in the human environment, continue to call for more detailed studies dedicated to elucidating the mechanisms that control the metals influence as an EDC. Keywords: Cadmium, Endocrine Disruption, Environmental Exposure, Toxic Metals, Ovary, Placenta, Reproduction, Steroidogenesis
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.003 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".