Student or educator? Sign up with your school email and get 6 months of Pro free.
Cited by 680

The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.

The human multidrug resistance-associated protein MRP is a plasma membrane drug-efflux pump.

Open access
Zaman, G J, Flens, M J, van Leusden, M R, de Haas, M, Mülder, H S, Lankelma, J, Pinedo, H M, Scheper, R J, Baas, F, Broxterman, H J·1994·Proceedings of the National Academy of Sciences

Abstract

The multidrug-resistance associated protein MRP is a 180- to 195-kDa membrane protein associated with resistance of human tumor cells to cytotoxic drugs. We have investigated how MRP confers drug resistance in SW-1573 human lung carcinoma cells by generating a subline stably transfected with an expression vector containing MRP cDNA. MRP-overexpressing SW-1573 cells are resistant to doxorubicin, daunorubicin, vincristine, VP-16, colchicine, and rhodamine 123, but not to 4'-(9-acridinylamino)methanesulfon-m-anisidide or taxol. The intracellular accumulation of drug (daunorubicin, vincristine, and VP-16) is decreased and the efflux of drug (daunorubicin) is increased in the transfectant. The decreased accumulation of daunorubicin is abolished by permeabilization of the plasma membrane with digitonin, showing that MRP can lower the intracellular daunorubicin level against a concentration gradient. Anti-MRP antisera predominantly stain the plasma membrane of MRP-overexpressing cells. We conclude that MRP is a plasma membrane drug-efflux pump.

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.91.19.8822

Cites

1 of 1 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 1 references

Cited by

See all 680

Metadata

Authors
Zaman, G. J., Flens, M. J., van Leusden, M. R., de Haas, M., Mülder, H. S., Lankelma, J., Pinedo, H. M., Scheper, R. J., Baas, F., & Broxterman, H. J.
Venue
Proceedings of the National Academy of Sciences
Published
1994-09-13
Volume
91
Issue
19
Pages
8822-8826
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2067898376
Cited by
680
References
1
FWCI
23.34
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: The human multidrug resistance-associated protein MRP is a plasma membrane drug-efflux pump. https://app.cochat.ai/papers/10.1073/pnas.91.19.8822
The paper
Zaman, G. J., Flens, M. J., van Leusden, M. R., de Haas, M., Mülder, H. S., Lankelma, J., Pinedo, H. M., Scheper, R. J., Baas, F., & Broxterman, H. J. (1994). The human multidrug resistance-associated protein MRP is a plasma membrane drug-efflux pump. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.91.19.8822

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.