Related Experiment Video
Updated: Jul 13, 2026
Identification of OTX1 and OTX2 As Two Possible Molecular Markers for Sinonasal Carcinomas and Olfactory Neuroblastomas
Published on: February 28, 2019
TRP matters: a pilot study on expression of mRNA in the parotid glands and their benign tumors
Lukas Louis1, Gentiana Wenzel2, Alessandro Bozzato2
1Institute of Anatomy and Cell Biology, Saarland University, Kirrberger Straße, Homburg/Saar, 66421, Germany.
Purpose:
The transient receptor potential (TRP) channels are a group of nonselective cation channels, which play critical roles in a variety of physiological processes and are also involved in the development of various carcinomas. However, the presence of TRP channels and their role in human benign salivary gland tumors has not been investigated yet.
Methods:
We assessed the mRNA expression of the TRP channels TRPA1, TRPC3, TRPC6, TRPM4, TRPM8 as well as the channel associated factors TCAF1 and TCAF2 in human specimens of pleomorphic adenoma (PA, n = 10) and Warthin tumors (WT, n = 10) of the parotid gland. The control group consisted of 5 healthy human parotid gland (PG) specimens. The analysis has been performed using qRT-PCR.
Results:
The mRNAs of TRPM4, TRPC6, TCAF1 and TCAF2 were found in normal parotid gland tissue and even more pronounced in PA and WT. However, no mRNA of TRPA1, TRPC3 and TRPM8 could be detected in normal parotid tissue nor in WT. In contrast, TPRC3 and TRPM8 mRNA were detected in PA. In 4 out of 10 PA high mRNA expression levels were found for these two genes.
Conclusion:
Our current pilot study suggests that TRPM4, TRPC6, TCAF1 and TCAF2 are expressed in normal parotid gland tissue and partially elevated in PA as well as WT of the parotid gland. TRPC3 and TRPM8 seem to be restricted to PA and may be highly expressed in a subgroup of parotid gland PA. These findings are important for a better understanding of PA biology.
Insights
Transient receptor potential (TRP) channels TRPM4, TRPC6, TCAF1, and TCAF2 are present in normal parotid glands and elevated in pleomorphic adenoma (PA) and Warthin tumors (WT). TRPC3 and TRPM8 are specific to PA.
Area of Science:
- Oncology
- Molecular Biology
- Physiology
Background:
- Transient receptor potential (TRP) channels are crucial in physiological processes and implicated in various carcinomas.
- The role of TRP channels in benign human salivary gland tumors remains unexplored.
Purpose of the Study:
- To investigate the expression of specific TRP channels and associated factors in human benign salivary gland tumors.
- To determine the presence and role of TRP channels in pleomorphic adenoma (PA) and Warthin tumors (WT).
Main Methods:
- Quantitative real-time PCR (qRT-PCR) was used to assess mRNA expression.
- Analyzed specimens included 10 PA, 10 WT, and 5 healthy parotid gland (PG) tissues.
- Examined TRP channels TRPA1, TRPC3, TRPC6, TRPM4, TRPM8, and factors TCAF1, TCAF2.
Main Results:
- TRPM4, TRPC6, TCAF1, and TCAF2 mRNA were detected in normal PG tissue, with higher expression in PA and WT.
- TRPA1, TRPC3, and TRPM8 mRNA were absent in normal PG and WT tissues.
- TRPC3 and TRPM8 mRNA were detected in PA, with high expression in a subset of PA cases.
Conclusions:
- TRPM4, TRPC6, TCAF1, and TCAF2 are expressed in normal parotid glands and elevated in PA and WT.
- TRPC3 and TRPM8 expression appears restricted to PA, potentially indicating a role in PA pathogenesis.
- These findings enhance understanding of PA biology and TRP channel involvement.
