Sinha G M, Chakravorty P
Gegenbaurs Morphol Jahrb. 1982;128(2):188-200.
The distribution and chemical nature of acid and neutral mucins in the various regions of the alimentary canal of Catla catla (Ham.) have been studied. Both acid (sulfated and non-sulfated) and neutral mucins have been found to occur as a mosaic of complex substances in the different mucous cell types (secretory and non-secretory--both mature and immature) in the various regions of the alimentary canal (buccopharynx, oesophagus, intestine, and rectum). Acid mucin (both sulfated and non-sulfated) of the secretory and mature non-secretory mucous cells in the buccopharyngeal and oesophageal regions, however, predominates since these 2 regions are known to participate actively in food lubrication while the sulfated acid mucin keeps the internal mucosa moist. Mucous mother cells which originate from the multipotent progenitor cells contain exclusively neutral mucin in the form of neutral mucopolysaccharide granules. In the course of development these mucous mother cells are gradually pushed towards the periphery of the mucosa and transformed into mature and secretory mucous cells through an intermediate stage--the immature mucous cells. The latter cells during development synthesize intact acid mucopolysaccharide granules which ultimately fuse to produce a compact mass of mucin (both acid and neutral) in the mature and secretory mucous cells.
对印度鲃（Ham.）消化道各区域酸性和中性黏蛋白的分布及化学性质进行了研究。已发现酸性（硫酸化和非硫酸化）和中性黏蛋白在消化道（口咽、食管、肠和直肠）的不同黏液细胞类型（分泌性和非分泌性——成熟和未成熟）中以复杂物质的镶嵌形式存在。然而，口咽和食管区域分泌性和成熟非分泌性黏液细胞中的酸性黏蛋白（硫酸化和非硫酸化）占主导，因为已知这两个区域积极参与食物润滑，而硫酸化酸性黏蛋白可保持内部黏膜湿润。源自多能祖细胞的黏液母细胞仅含有呈中性黏多糖颗粒形式的中性黏蛋白。在发育过程中，这些黏液母细胞逐渐被推向黏膜外周，并通过一个中间阶段——未成熟黏液细胞，转化为成熟和分泌性黏液细胞。后者在发育过程中合成完整的酸性黏多糖颗粒，这些颗粒最终融合，在成熟和分泌性黏液细胞中产生致密的黏蛋白团块（酸性和中性）。
