Goblet cells primarily utilize which vitamin to produce mucous?

Goblet cells primarily utilize which vitamin to produce mucous?

• A. Vitamin B12
• B. Vitamin C
• C. Vitamin A
• D. Vitamin D

Answer: (C)

Vitamin A is required to maintain the ocular surface epithelium, especially the goblet cells that secrete mucus. Goblet cells produce gel-forming mucins (like MUC5AC) that form the protective mucus layer essential for tear film stability and lubrication of the cornea. The active metabolite of vitamin A, retinoic acid, drives goblet cell differentiation and regulates mucin gene expression. When vitamin A is deficient, goblet cell numbers and mucin production decline, leading to dry eye symptoms and ocular surface changes such as keratinization (xerophthalmia) and Bitot spots. So, adequate vitamin A is key for goblet cell–mediated mucous production. The other vitamins listed don’t have this direct, specific role in goblet cell mucin production.

Vitamin A is required to maintain the ocular surface epithelium, especially the goblet cells that secrete mucus. Goblet cells produce gel-forming mucins (like MUC5AC) that form the protective mucus layer essential for tear film stability and lubrication of the cornea. The active metabolite of vitamin A, retinoic acid, drives goblet cell differentiation and regulates mucin gene expression. When vitamin A is deficient, goblet cell numbers and mucin production decline, leading to dry eye symptoms and ocular surface changes such as keratinization (xerophthalmia) and Bitot spots. So, adequate vitamin A is key for goblet cell–mediated mucous production. The other vitamins listed don’t have this direct, specific role in goblet cell mucin production.