Biomaterial Database

Lysosome activity in immunogenesis during experimental protein-calorie malnutrition. 1979

A A Popov, and I T Apostolov, and L P Krustev

Several structural characteristics of the lysosome apparatus in the liver and the spleen of 80 mature (4-month old) female albino Wistar rats subjected to ad libitum feeding (17.5% protein = control) and to chronic (16 weeks) highly restricted diet (5.7% protein) were studied electron-microscopically. The beta-glucosaminidase and alpha-mannosidase serum activity, assessing lysosome membrane permeability, was also determined. Results obtained in these studies are compared with data from quantitative and semi-qualitative immunoelectrophoretic analysis of IgG and IgM in the serum as well as with the existing capacities for the production of specific precipitating antibodies post antigen stimulation with 10% human gamma-globulin and incomplete Freund's adjuvant. Distinctly disturbed IgM synthesis and precipitating antibody production was observed in rats subjected to restricted diet. Inhibition of humoral immunogenesis probably begins as early as endocytosis, and is determined by the ineffective heterophagic function of the lysosomes against the introduced antigen. It can be assumed that this is a result of pathologically enhanced autophagy due to increased endogenic nutrition, exhausting the lysosome system's functional capacity and affecting not only hepatocytes and macrophages, but also some other immunocompetent cells.

UI	MeSH Term	Description	Entries
D007074	Immunoglobulin G	The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B.	Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
D007075	Immunoglobulin M	A class of immunoglobulin bearing mu chains (IMMUNOGLOBULIN MU-CHAINS). IgM can fix COMPLEMENT. The name comes from its high molecular weight and originally was called a macroglobulin.	Gamma Globulin, 19S,IgM,IgM Antibody,IgM1,IgM2,19S Gamma Globulin,Antibody, IgM
D007122	Immunoelectrophoresis	A technique that combines protein electrophoresis and double immunodiffusion. In this procedure proteins are first separated by gel electrophoresis (usually agarose), then made visible by immunodiffusion of specific antibodies. A distinct elliptical precipitin arc results for each protein detectable by the antisera.
D008099	Liver	A large lobed glandular organ in the abdomen of vertebrates that is responsible for detoxification, metabolism, synthesis and storage of various substances.	Livers
D008247	Lysosomes	A class of morphologically heterogeneous cytoplasmic particles in animal and plant tissues characterized by their content of hydrolytic enzymes and the structure-linked latency of these enzymes. The intracellular functions of lysosomes depend on their lytic potential. The single unit membrane of the lysosome acts as a barrier between the enzymes enclosed in the lysosome and the external substrate. The activity of the enzymes contained in lysosomes is limited or nil unless the vesicle in which they are enclosed is ruptured or undergoes MEMBRANE FUSION. (From Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed).	Autolysosome,Autolysosomes,Lysosome
D008361	Mannosidases	Glycoside hydrolases that catalyze the hydrolysis of alpha or beta linked MANNOSE.	Mannosidase
D011502	Protein-Energy Malnutrition	The lack of sufficient energy or protein to meet the body's metabolic demands, as a result of either an inadequate dietary intake of protein, intake of poor quality dietary protein, increased demands due to disease, or increased nutrient losses.	Marasmus,Protein-Calorie Malnutrition,Malnutrition, Protein-Calorie,Malnutrition, Protein-Energy,Malnutritions, Protein-Energy,Protein Calorie Malnutrition,Protein Energy Malnutrition
D005260	Female		Females
D006596	Hexosaminidases	Enzymes that catalyze the hydrolysis of N-acylhexosamine residues in N-acylhexosamides. Hexosaminidases also act on GLUCOSIDES; GALACTOSIDES; and several OLIGOSACCHARIDES.	Galactosaminidases,Hexosaminidase,Galactosaminidase,Glucosaminidase,Glucosaminidases
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia