PXD033362

PXD033362 is an original dataset announced via ProteomeXchange.

Title	Bioenergetic phenotyping of DEN-induced hepatocellular carcinoma reveals a link between adenylate kinase isoform expression and reduced complex I-supported respiration.
Description	Hepatocellular carcinoma (HCC) is the most common form of liver cancer worldwide. Increasing evidence suggests that mitochondria play a central role in malignant metabolic reprogramming in HCC, which may promote disease progression. To comprehensively evaluate the mitochondrial phenotype present in HCC, we applied a recently developed diagnostic workflow that combines high-resolution respirometry, fluorometry, and mitochondrial-targeted nLC-MS/MS proteomics to cell culture (AML12 and Hepa 1-6 cells) and diethylnitrosamine (DEN)-induced mouse models of HCC. Across both model systems, CI-linked respiration was significantly decreased in HCC compared to nontumor, though this did not alter ATP production rates. Interestingly, CI-linked respiration was found to be restored in DEN-induced tumor mitochondria through acute in vitro treatment with P1, P5-di(adenosine-5′) pentaphosphate (Ap5A), a broad inhibitor of adenylate kinases. Mass spectrometry-based proteomics revealed that DEN-induced tumor mitochondria had increased expression of adenylate kinase isoform 4 (AK4), which may account for this response to Ap5A. Tumor mitochondria also displayed a reduced ability to retain calcium and generate membrane potential across a physiological span of ATP demand states compared to DEN-treated nontumor or saline-treated liver mitochondria. We validated these findings in flash-frozen human primary HCC samples, which similarly displayed a decrease in mitochondrial respiratory capacity that disproportionately affected CI. Our findings support the utility of mitochondrial phenotyping in identifying novel regulatory mechanisms governing cancer bioenergetics.
HostingRepository	jPOST
AnnounceDate	2023-04-22
AnnouncementXML	Submission_2023-04-21_08:00:09.669.xml
DigitalObjectIdentifier
ReviewLevel	Non peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Unsupported dataset by repository
PrimarySubmitter	Kelsey Fisher-Wellman
SpeciesList	scientific name: Mus musculus (Mouse); NCBI TaxID: 10090;
ModificationList	S-carboxamidomethyl-L-cysteine; L-methionine sulfoxide; TMT6plex reporter+balance reagent N-acylated residue; TMT6plex reporter+balance reagent acylated N-terminal
Instrument	Q Exactive

Revision	Datetime	Status	ChangeLog Entry
0	2022-04-21 08:46:57	ID requested
⏵ 1	2023-04-21 08:00:10	announced

Dataset with its publication pending

submitter keyword: mitochondria, hepatocellular carcinoma, tumor, diethylnitrosamine

Kelsey Fisher-Wellman
lab head
Kelsey Fisher-Wellman
contact affiliation	East Carolina Diabetes and Obesity Institute
dataset submitter

jPOST dataset URI

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