Cited by 685Cancer Immunotherapy and BiomarkersMicroRNA in disease regulationCancer-related Molecular Pathways

PDL1 Regulation by p53 via miR-34

Open access
Cortez, Maria Angelica, Ivan, Cristina, Valdecanas, David, Wang, Xiaohong, Peltier, Heidi J., Ye, Yuping, Araujo, Luiz, Carbone, David P. +10 more·2016·JNCI: Journal of the National Cancer Institute

Abstract

BACKGROUND: Although clinical studies have shown promise for targeting PD1/PDL1 signaling in non-small cell lung cancer (NSCLC), the regulation of PDL1 expression is poorly understood. Here, we show that PDL1 is regulated by p53 via miR-34. METHODS: p53 wild-type and p53-deficient cell lines (p53(-/-) and p53(+/+) HCT116, p53-inducible H1299, and p53-knockdown H460) were used to determine if p53 regulates PDL1 via miR-34. PDL1 and miR-34a expression were analyzed in samples from patients with NSCLC and mutated p53 vs wild-type p53 tumors from The Cancer Genome Atlas for Lung Adenocarcinoma (TCGA LUAD). We confirmed that PDL1 is a direct target of miR-34 with western blotting and luciferase assays and used a p53(R172HΔ)g/+K-ras(LA1/+) syngeneic mouse model (n = 12) to deliver miR-34a-loaded liposomes (MRX34) plus radiotherapy (XRT) and assessed PDL1 expression and tumor-infiltrating lymphocytes (TILs). A two-sided t test was applied to compare the mean between different treatments. RESULTS: We found that p53 regulates PDL1 via miR-34, which directly binds to the PDL1 3' untranslated region in models of NSCLC (fold-change luciferase activity to control group, mean for miR-34a = 0.50, SD = 0.2, P < .001; mean for miR-34b = 0.52, SD = 0.2, P = .006; and mean for miR-34c = 0.59, SD = 0.14, and P = .006). Therapeutic delivery of MRX34, currently the subject of a phase I clinical trial, promoted TILs (mean of CD8 expression percentage of control group = 22.5%, SD = 1.9%; mean of CD8 expression percentage of MRX34 = 30.1%, SD = 3.7%, P = .016, n = 4) and reduced CD8(+)PD1(+) cells in vivo (mean of CD8/PD1 expression percentage of control group = 40.2%, SD = 6.2%; mean of CD8/PD1 expression percentage of MRX34 = 20.3%, SD = 5.1%, P = .001, n = 4). Further, MRX34 plus XRT increased CD8(+) cell numbers more than either therapy alone (mean of CD8 expression percentage of MRX34 plus XRT to control group = 44.2%, SD = 8.7%, P = .004, n = 4). Finally, miR-34a delivery reduced the numbers of radiation-induced macrophages (mean of F4-80 expression percentage of control group = 52.4%, SD = 1.7%; mean of F4-80 expression percentage of MRX34 = 40.1%, SD = 3.5%, P = .008, n = 4) and T-regulatory cells. CONCLUSIONS: We identified a novel mechanism by which tumor immune evasion is regulated by p53/miR-34/PDL1 axis. Our results suggest that delivery of miRNAs with standard therapies, such as XRT, may represent a novel therapeutic approach for lung cancer.

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 · 10.1093/jnci/djv303

Cites

57 of 57 references verified0 citation errors · 0 not checkable

Statistics

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

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Activating wild-type proteins can increase IFNγ signaling and sensitize tumors to immune checkpoint inhibitors, whereas corresponding mutant proteins can reduce the efficacy of immune checkpoint inhibitors.

    “On the other hand, activating wild-type proteins can increase IFNγ signaling and sensitize tumors to immune checkpoint inhibitors, whereas corresponding mutant proteins can reduce the efficacy of immune checkpoint inhibitors.612–614”
  • Some missense mutant proteins can lose the transcriptional effects of wild-type genes, such as keeping PDL1 expression low, making cancer cells more susceptible to cytotoxic T cells and NK cells, limiting the immune system's ability to attack cancer cells.

    “Some missense mutant proteins can lose the transcriptional effects of wild-type genes, such as keeping PDL1 expression levels low, thereby making cancer cells more susceptible to cytotoxic T cells and NK cells, limiting the immune system’s ability to attack cancer cells.”
  • The status of genes can influence tumor cells through the impact of wild-type gene loss and through their effects on the tumor immune microenvironment.

    “In brief, the status of genes can influence tumor cells not only through the impact of wild-type gene loss but also through their effects on the TIME.”

Self-check

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

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

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Cortez, M. A., Ivan, C., Valdecanas, D., Wang, X., Peltier, H. J., Ye, Y., Araujo, L., Carbone, D. P., Shilo, K., Giri, D. K., Kelnar, K., Martin, D., Komaki, R., Gomez, D. R., Krishnan, S., Calin, G. A., Bader, A. G., & Welsh, J. W.
Affiliations
The University of Texas MD Anderson Cancer Center (US)
Corresponding author
Welsh, James W.
Venue
JNCI: Journal of the National Cancer Institute
Published
2015-11-17
Volume
108
Issue
1
ISSN
  • 0027-8874 (ISSN-L)
  • 1460-2105
OpenAlex
W2173135538
Cited by
683
References
57
Citations by year
2026: 42 · 2025: 53 · 2024: 72 · 2023: 66 · 2022: 72 · 2021: 94 · 2020: 86 · 2019: 61 · 2018: 62 · 2017: 50 · 2016: 24 · 2012: 1
FWCI
19.80
Type
journal article
Language
en
Open access
Locations
  • JNCI Journal of the National Cancer Institute (publishedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • U.S. Department of Defense (W81XWH0610303, W81XWH, W81XWH-07-1-03060)
  • Cancer Prevention and Research Institute of Texas (CA016672)
  • Doctors Cancer Foundation
  • Lung Cancer Research Foundation
  • National Institutes of Health (UH2TR000943, W81XWH, CA- 016672, 1UH2TR00943-01)
  • University of Texas MD Anderson Cancer Center ((CA016672), grant CA016672)
  • National Cancer Institute (Grant CA016672, CA 016672, CA016672 to, 1UH2TR00943-01, R01CA182905, P30CA016672)
  • National Center for Advancing Translational Sciences (1UH2TR00943-01)
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
PD-L1, p53, miR-34, non-small cell lung cancer, lung adenocarcinoma, miR-34a, miR-34b, miR-34c, 3' untranslated region, tumor-infiltrating lymphocytes, radiotherapy, immune checkpoint, TP53 mutation
MeSH terms
Adenocarcinoma of Lung, Adenocarcinoma, Animals, Carcinoma, Non-Small-Cell Lung, Liposomes, Lung Neoplasms, Neoplasms, Experimental, Gene Expression Regulation, Neoplastic, Tumor Suppressor Protein p53, CD8 Antigens, MicroRNAs, Cell Line, Tumor, Cell Proliferation, Mice, B7-H1 Antigen

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