Background
Transmembrane protein 43 (
TMEM43
), a member of the TMEM subfamily, is encoded by a highly conserved gene and widely expressed in most species from bacteria to humans. In previous studies, TMEM43 has been found to play an important role in a variety of tumors. However, the role of TMEM43 in cancer remains unclear.
Methods
We utilized the RNA sequencing (RNA-seq) and The Cancer Genome Atlas (TGCA) databases to explore and identify genes that may play an important role in the occurrence and development of hepatocellular carcinoma (HCC), such as
TMEM43
. The role of
TMEM43
in HCC was explored through Cell Counting Kit-8 (CCK-8) cloning, flow cytometry, and Transwell experiments. The regulatory relationship between
TMEM43
and voltage-dependent anion channel 1 (
VDAC1
) was investigated through coimmunoprecipitation (co-IP) and western blot (WB) experiments. WB was used to study the deubiquitination effect of ubiquitin-specific protease 7 (
USP7
) on
TMEM43
.
Results
In this study, we utilized the RNA-seq and TGCA databases to mine data and found that
TMEM43
is highly expressed in HCC. The absence of
TMEM43
in cancer cells was shown to inhibit tumor development. Further research detected an important regulatory relationship between
TMEM43
and
VDAC1
. In addition, we found that
USP7
affected the progression of HCC by regulating the ubiquitination level of
TMEM43
through deubiquitination.
Conclusions
Our study demonstrated that USP7 participates in the growth of HCC tumors through
TMEM43/VDAC1
.Our results suggest that
USP7/TMEM43/VDAC1
may have predictive value and represent a new treatment strategy for HCC.