Evidence map›Paper›PMID 27459541›Full record

ArticleEndocrinology2016

Endocrine Response Phenotypes Are Altered by Charcoal-Stripped Serum Variability.

Matthew J Sikora, Michael D Johnson, Adrian V Lee, Steffi Oesterreich

Open access · bronzeAbstract read
In one paragraph

Article in Endocrinology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
4.2field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

40 citing papers in PubMed, 71 citations in OpenAlex.

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  9. The Age-dependent Influence of the Infrapatellar Fat Pad on Chondrocyte Extracellular Matrix Production.The journals of gerontology. Series A, Biological sciences and medical sciences · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 1 country.

Matthew J SikoraWomen's Cancer Research Center (M.J.S., A.V.L., S.O.) and Department of Pharmacology and Chemical Biology (M.J.S., A.V.L., S.O.), University of Pittsburgh, Pittsburgh, Pennsylvania 15213; and Department of Oncology (M.D.J.), Georgetown University Lombardi Comprehensive Cancer Center, Georgetown University, Washington, D.C. 20057.
Michael D JohnsonWomen's Cancer Research Center (M.J.S., A.V.L., S.O.) and Department of Pharmacology and Chemical Biology (M.J.S., A.V.L., S.O.), University of Pittsburgh, Pittsburgh, Pennsylvania 15213; and Department of Oncology (M.D.J.), Georgetown University Lombardi Comprehensive Cancer Center, Georgetown University, Washington, D.C. 20057.
Adrian V LeeWomen's Cancer Research Center (M.J.S., A.V.L., S.O.) and Department of Pharmacology and Chemical Biology (M.J.S., A.V.L., S.O.), University of Pittsburgh, Pittsburgh, Pennsylvania 15213; and Department of Oncology (M.D.J.), Georgetown University Lombardi Comprehensive Cancer Center, Georgetown University, Washington, D.C. 20057.
Steffi OesterreichWomen's Cancer Research Center (M.J.S., A.V.L., S.O.) and Department of Pharmacology and Chemical Biology (M.J.S., A.V.L., S.O.), University of Pittsburgh, Pittsburgh, Pennsylvania 15213; and Department of Oncology (M.D.J.), Georgetown University Lombardi Comprehensive Cancer Center, Georgetown University, Washington, D.C. 20057.
UPMC Hillman Cancer Center · USCancer Research Center · USGeorgetown Lombardi Comprehensive Cancer Center

Funding

VECTOR CORE FACILITYP30CA047904 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI JOHN C. BYRD · 1988 to 2026
$158.0M
Tissue Culture Shared ResourceP30CA051008 · NCI · GEORGETOWN UNIVERSITY · PI Louis M Weiner · 1990 to 2026
$71.5M
Elucidating the function of WNT4 in endocrine response and resistance in invasive lobular carcinomaK99CA193734 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI SIKORA, MATTHEW J · 2015 to 2016
$256k
NCI NIH HHS K99 CA193734NCI NIH HHS P30 CA047904NCI NIH HHS P30 CA051008
6 · The paper itself

Abstract

Charcoal-stripped bovine serum (CSS) is a critical reagent in the study of steroid hormones. However, CSS has high lot-to-lot variability, including residual growth factor and steroid hormone content. Assessing and reporting this variability is challenging but may affect experimental outcomes and data reproducibility. We hypothesized that CSS lot variability would affect endocrine response phenotypes in breast cancer cells, and we tested the effects of five individual CSS lots on endocrine response in MCF-7 and MDA MB 134VI (MM134) cells. Based on the effects of antiestrogens on MCF-7 cell proliferation, we defined CSS lots as having complete vs partial hormone deprivation. In partial deprivation CSS, the absolute effects of residual estrogens on cell proliferation were modest, but these effects masked the partial agonist activity of 4-hydroxytamoxifen in MM134 cells. Importantly, this effectively reversed the interpretation of tamoxifen-resistance in MM134 cells. Variable effects of CSS lots on endocrine resistance phenotypes were also observed in MCF-7 cells. In this context, we observed that partial vs complete deprivation CSS allowed for the development of unique early endocrine resistance phenotypes that correlated with the presence or absence of residual estrogenic hormones. We evaluated the methods of CSS preparation and identified factors contributing to the extent of hormone deprivation. Our observations suggest that CSS lot-to-lot variability has substantial effects on endocrine response phenotypes and that this ubiquitous factor in study methodology may confound reproducibility. Renewed vigilance in testing and reporting CSS phenotypes will greatly aid in interpreting and reproducing endocrine response and resistance data by the community.

Indexed as

SerumBreast NeoplasmsEstrogensHumansMCF-7 CellsPhenotypeEstrogens

Identifiers

PMID27459541
PMCPMC5045515
OpenAlexW2501500157

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.