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Updated: Jun 23, 2026
Genetic Variant Detection in the CALR gene using High Resolution Melting Analysis
Published on: August 26, 2020
Study on the influence of calreticulin on melasma based on bioinformatics
Weixue Jia1, Dejuan Yang2, Shanshan Yu2
1Department of Dermatology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China.
Abstract:
Melasma is a common acquired pigmented dermatosis, which seriously affects the appearance and quality of life of patients. Calreticulin (CALR) is a pleiotropic protein existing in nucleated cells, which mediates cellular immunity, and cellular immunity is closely related to the occurrence of melasma. In this study, 55 differentially expressed genes (31 up-regulated and 24 down-regulated) were screened by bioinformatics analysis of GSE72140 data set, and it was found that CALR was significantly highly expressed in melasma lesions. Functional enrichment analysis showed that CALR was associated with biological processes such as the localization and regulation of ribonucleoprotein complex and the assembly of MHC-I complex, and participated in the progression of melasma through KEGG pathway (such as cell cycle and progesterone-mediated oocyte maturation). Single cell analysis further revealed that CALR was highly expressed in Langerhans cells, macrophages and other immune cells, suggesting that CALR may promote melanin production through immune inflammatory reaction. Correlation analysis showed that CALR was strongly associated with PPDPF, CDC16 and PAPOLA, suggesting that CALR may regulate the function of melanocytes by influencing cell signal transduction, cell cycle regulation and mRNA metabolism. Protein interaction network analysis showed that CALR interacted with TET2, TP2 and STYX, suggesting that CALR may affect melasma through epigenetic regulation. This study provides the preliminary bioinformatics-based evidence for a potential role of CALR in melasma and proposes the 'immune-melanin axis' as an exploratory framework. However, these findings are only hypotheses and need to be experimentally validated through in vitro and in vivo studies in the future.
Insights
Calreticulin (CALR) is highly expressed in melasma, potentially driving melanin production via immune responses. This study suggests an
Area of Science:
- Dermatology
- Immunology
- Bioinformatics
Background:
- Melasma is a common skin condition impacting patient appearance and quality of life.
- Cellular immunity is implicated in melasma pathogenesis.
- Calreticulin (CALR) is a protein involved in cellular immunity.
Purpose of the Study:
- To investigate the role of Calreticulin (CALR) in melasma pathogenesis using bioinformatics.
- To explore the potential 'immune-melanin axis' in melasma development.
Main Methods:
- Bioinformatic analysis of the GSE72140 dataset.
- Functional enrichment analysis (Gene Ontology, KEGG pathways).
- Single-cell analysis, correlation analysis, and protein-protein interaction network analysis.
Main Results:
- CALR was significantly upregulated in melasma lesions and highly expressed in immune cells (Langerhans cells, macrophages).
- CALR is associated with immune processes (MHC-I complex assembly) and cell signaling pathways.
- CALR interacts with genes involved in epigenetic regulation and mRNA metabolism, suggesting a role in melanocyte function.
Conclusions:
- Bioinformatic data suggest CALR plays a role in melasma, potentially by linking immune responses to melanin production.
- The proposed 'immune-melanin axis' offers a novel framework for understanding melasma.
- Experimental validation of these findings is required.
