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Identification of mucins and their expression in the vector mosquito Aedes albopictus
Fangqing Deng1,2, Si Wu1,2, Yan Wu1,2
1Hunan Provincial Key Laboratory of Animal Intestinal Function and Regulation, College of Life Science, Hunan Normal University, Changsha, 410081, China.
Abstract:
Mucins, the main structural components of vertebrate respiratory, digestive and reproductive tract mucus, as well as insect peritrophic matrix, play important roles in protecting host cells from invading microbes and difficult external environments. Mucins are characterized by highly glycosylated proteins constituting the mucin domain that is rich in repetitive sequences of threonine, serine, and proline (PTS). Despite potential important roles, mosquito mucins remain largely uncharacterized. Here, we performed bioinformatics analyses to identify proteins with PTS repeat domain and predicted 43 mucins or mucin-related proteins in Aedes albopictus. Gene expression analysis revealed that these mucins are dynamically expressed across different development stages and in different organs of Aedes albopictus. Of note, blood feeding upregulated AALF016448 and AALF013291 expression in the midgut, fat body, and ovary, raising the possibility that these mucins play potential roles in reproduction, digestion, and intestinal defense against invading pathogens upon blood feeding. Our in silico identification, followed by expressional validation, thus established a valuable resource for further dissecting the functions of mucins for vector control.
Insights
Researchers identified 43 mosquito mucins, finding key proteins upregulated after blood meals, suggesting roles in reproduction and defense. This study provides a resource for understanding mucin function in Aedes albopictus for vector control.
Area of Science:
- Molecular Biology
- Entomology
- Bioinformatics
Background:
- Mucins are key structural proteins in mucus, protecting hosts from microbes and environmental stress.
- Mosquito mucins, crucial for insect health, remain largely uncharacterized.
- Mucins feature a domain rich in proline, threonine, and serine (PTS) repeats.
Purpose of the Study:
- To identify and characterize mucins in Aedes albopictus using bioinformatics.
- To investigate the expression patterns of Aedes albopictus mucins.
- To explore potential roles of mucins in mosquito physiology and vector competence.
Main Methods:
- Bioinformatic analysis to identify proteins with PTS repeat domains.
- Gene expression analysis across different developmental stages and organs.
- Differential gene expression analysis following a blood meal.
Main Results:
- 43 mucin or mucin-related proteins were predicted in Aedes albopictus.
- Mucin gene expression varied significantly across developmental stages and tissues.
- Blood feeding upregulated specific mucins (AALF016448, AALF013291) in the midgut, fat body, and ovary.
Conclusions:
- This study provides the first comprehensive identification of Aedes albopictus mucins.
- Upregulated mucins suggest roles in reproduction, digestion, and immune defense post-blood feeding.
- The findings establish a foundation for functional studies of mucins in mosquito vector control.
