Lysosomal Storage Diseases (LSDs): Causes, Symptoms, and Diagnosis
Lysosomal storage diseases (LSDs) are a group of rare, inherited metabolic disorders caused by the malfunction of lysosomes, the cellular "recycling centers" responsible for breaking down waste materials, damaged organelles, and macromolecules. Lysosomes use a wide array of enzymes to degrade and recycle biological molecules into their basic components. However, in LSDs, deficiencies or dysfunctions in specific lysosomal enzymes lead to the accumulation of undegraded substrates within lysosomes. This buildup disrupts cellular function, resulting in progressive tissue and organ damage. Here, we provide an overview of three well-known LSDs — Gaucher disease, Niemann-Pick disease, and Tay-Sachs disease — with their genetic mechanisms, symptoms, and diagnostic approaches. Gaucher Disease Genetic Cause Gaucher disease is caused by mutations in the GBA gene , which encodes the enzyme glucocerebrosidase . This enzyme breaks down glucocerebroside , a fatty substance found in cell mem...