Plant cell-wall polysaccharides and proteins

Plant cell-wall polysaccharides and proteins represent the complex structural framework of plant cells, consisting of a network of cellulose microfibrils, hemicelluloses, and pectins, interspersed with structural proteins like extensins (Cosgrove, 2005, Nature Reviews Molecular Cell Biology). In human health, these components are primarily categorized as dietary fiber, which is essential for maintaining gastrointestinal motility and supporting a healthy gut microbiome through prebiotic fermentation (Scheller & Ulvskov, 2010, Annual Review of Plant Biology). Certain proteins within this matrix, particularly those found in pollen and specific foods, act as potent allergens that trigger IgE-mediated hypersensitivity reactions (Breiteneder & Radauer, 2004, Journal of Allergy and Clinical Immunology). While they do not function as endogenous human receptors, they are the targets of exogenous digestive enzymes like cellulase and pectinase, which are used to alleviate malabsorption (Ritz & Bernstein, 2006, Journal of Dietary Supplements). Furthermore, the physical and chemical properties of these polysaccharides are extensively utilized in drug delivery systems for controlled release and as scaffolds in regenerative medicine (Mohnen, 2008, Current Opinion in Plant Biology). Their role in disease is multifaceted, ranging from the management of metabolic disorders like diabetes to the provocation of severe allergic responses. Therapeutic interventions often focus on either the degradation of these structures to improve digestion or the modulation of the immune response to their allergenic components.

Other names

Dietary fiberPlant cell wall matrixLignocellulosic biomassNon-starch polysaccharides (NSP)Roughage

Enzymatic hydrolysis of glycosidic bonds, physical bulk formation in the intestinal lumen, and immune system sensitization via IgE binding.