Evidence map›Paper›PMID 34649584›Full record

ArticleMolecular cancer2021

AMPK promotes antitumor immunity by downregulating PD-1 in regulatory T cells via the HMGCR/p38 signaling pathway.

Ram Hari Pokhrel, Suman Acharya, Jae-Hee Ahn, Ye Gu, Mahesh Pandit, Jong-Oh Kim, Yun-Yong Park, Ben Kang, Hyun-Jeong Ko, Jae-Hoon Chang

Open access · goldAbstract read
In one paragraph

Article in Molecular cancer, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
60citing papers in PubMed, 1 pooled it
4.4field-weighted citation impact, top 4% 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

60 citing papers in PubMed, 1 synthesis or guideline pooled it, 81 citations in OpenAlex.

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  14. Ferroptosis of T cell in inflammation and tumour immunity.Clinical and translational medicine · 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

10 authors at 4 institutions in 1 country.

Ram Hari Pokhrel *College of Pharmacy, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongbuk-do, 38541, Republic of Korea.
Suman Acharya *College of Pharmacy, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongbuk-do, 38541, Republic of Korea.
Jae-Hee Ahn *Department of Pharmacy, Kangwon National University, Kangwondaehak-gil 1, Chuncheon, 24341, Republic of Korea.
Ye GuCollege of Pharmacy, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongbuk-do, 38541, Republic of Korea.
Mahesh PanditCollege of Pharmacy, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongbuk-do, 38541, Republic of Korea.
Jong-Oh KimCollege of Pharmacy, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongbuk-do, 38541, Republic of Korea.
Yun-Yong ParkDepartment of Life Science, Chung-Ang University, Seoul, 06974, Republic of Korea.
Ben KangDepartment of Pediatrics, School of Medicine, Kyungpook National University, Daegu, 41944, Republic of Korea.
Hyun-Jeong KoDepartment of Pharmacy, Kangwon National University, Kangwondaehak-gil 1, Chuncheon, 24341, Republic of Korea. hjko@kangwon.ac.kr.
Jae-Hoon ChangCollege of Pharmacy, Yeungnam University, 280 Daehak-ro, Gyeongsan-si, Gyeongbuk-do, 38541, Republic of Korea. jchang@yu.ac.kr.ORCID 0000-0002-1001-6570
Yeungnam University · KRKangwon National University · KRChung-Ang University · KRKyungpook National University · KR

Funding

National Research Foundation of Korea 2020R1A5A8019180National Research Foundation of Korea NRF-2017M3A9C8060387National Research Foundation of Korea NRF-2019R1A2C1006387
6 · The paper itself

Abstract

backgroundAMP-activated protein kinase (AMPK) is a metabolic sensor that maintains energy homeostasis. AMPK functions as a tumor suppressor in different cancers; however, its role in regulating antitumor immunity, particularly the function of regulatory T cells (Tregs), is poorly defined.

methodsAMPKα1

resultsThe deletion of the AMPKα1 subunit in Tregs accelerates tumor growth by increasing the expression of PD-1. Metabolically, loss of AMPK in Tregs promotes glycolysis and the expression of 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR), a key enzyme of the mevalonate pathway. Mechanistically, AMPK activates the p38 mitogen-activated protein kinase (MAPK) that phosphorylates glycogen synthase kinase-3β (GSK-3β), inhibiting the expression of PD-1 in Tregs.

conclusionOur study identified an AMPK regulatory mechanism of PD-1 expression via the HMGCR/p38 MAPK/GSK3β signaling pathway. We propose that the AMPK activator can display synergic antitumor effect in murine tumor models, supporting their potential clinical use when combined with anti-PD-1 antibody, anti-CTLA-4 antibody, or a HMGCR inhibitor.

Indexed as

ImmunomodulationSignal TransductionAMP-Activated Protein KinasesAnimalsCell Line, TumorDisease Models, AnimalDisease ProgressionEnergy MetabolismGene Expression RegulationGlycogen Synthase Kinase 3 betaHumansHydroxymethylglutaryl CoA ReductasesImmunophenotypingMicep38 Mitogen-Activated Protein KinasesProgrammed Cell Death 1 ReceptorAMP-Activated Protein KinasesGlycogen Synthase Kinase 3 betaHMGCR protein, humanHydroxymethylglutaryl CoA Reductasesp38 Mitogen-Activated Protein KinasesPDCD1 protein, humanProgrammed Cell Death 1 ReceptorAICARAMPKCompound CHMGCRPD-1TregsTumor

Identifiers

PMID34649584
PMCPMC8515644
OpenAlexW3205596420

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.