Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 1,065

The DOI matches its Crossref record; 4 of the 4 references it cites were found in a registry or an index.

Induction of calcium-dependent nitric oxide synthases by sex hormones.

Open access
Weiner, C P, Lizasoain, I, Baylis, S A, Knowles, R G, Charles, I G, Moncada, S·1994·Proceedings of the National Academy of Sciences

Abstract

We have examined the effects of pregnancy and sex hormones on calcium-dependent and calcium-independent nitric oxide synthases (NOSs) in the guinea pig. Pregnancy (near term) caused a > 4-fold increase in the activity of calcium-dependent NOS in the uterine artery and at least a doubling in the heart, kidney, skeletal muscle, esophagus, and cerebellum. The increase in NOS activity in the cerebellum during pregnancy was inhibited by the estrogen-receptor antagonist tamoxifen. Treatment with estradiol (but not progesterone) also increased calcium-dependent NOS activity in the tissues examined from both females and males. Testosterone increased calcium-dependent NOS only in the cerebellum. No significant change in calcium-independent NOS activity was observed either during pregnancy or after the administration of any sex hormone. Both pregnancy and estradiol treatment increased the amount of mRNAs for NOS isozymes eNOS and nNOS in skeletal muscle, suggesting that the increases in NOS activity result from enzyme induction. Thus both eNOS and nNOS are subject to regulation by estrogen, an action that could explain some of the changes that occur during pregnancy and some gender differences in physiology and pathophysiology.

Overview

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1073/pnas.91.11.5212

Cites

4 of 4 references verified0 citation errors · 0 not checkable

Statistics

Verification

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Citations

Cites

Show all 4 references

Cited by

See all 1,065

Metadata

Authors
Weiner, C. P., Lizasoain, I., Baylis, S. A., Knowles, R. G., Charles, I. G., & Moncada, S.
Venue
Proceedings of the National Academy of Sciences
Published
1994-05-24
Volume
91
Issue
11
Pages
5212-5216
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2164319707
Cited by
1,065
References
4
FWCI
46.75
Type
journal article
Language
en
Open access
green

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Induction of calcium-dependent nitric oxide synthases by sex hormones. https://app.cochat.ai/papers/10.1073/pnas.91.11.5212
The paper
Weiner, C. P., Lizasoain, I., Baylis, S. A., Knowles, R. G., Charles, I. G., & Moncada, S. (1994). Induction of calcium-dependent nitric oxide synthases by sex hormones. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.91.11.5212

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.