Increased expression of lysosomal acid phosphatase in CLN3-defective cells and mouse brain tissue. 2007

Sandra Pohl, and Hannah M Mitchison, and Alfried Kohlschütter, and Otto van Diggelen, and Thomas Braulke, and Stephan Storch
Department of Biochemistry, Children's Hospital, University Medical Center Hamburg, Hamburg, Germany.

Juvenile neuronal ceroid lipofuscinosis (Batten disease) is a neurodegenerative disorder caused by defective function of the lysosomal membrane glycoprotein CLN3. The activity of the lysosomal acid phosphatase (LAP/ACP2) was found to be significantly increased in the cerebellum and brain stem of Cln3-targeted mice during the early stages of postnatal life. Histochemical localization studies revealed an increased LAP/ACP2 staining intensity in neurons of the cerebral cortex of 48-week-old Cln3-targeted mice as compared with controls. Additionally, the expression of another lysosomal membrane protein LAMP-2 was increased in all brain areas. Knockdown of CLN3 expression in HeLa cells by RNA interference also resulted in increased LAP/ACP2 and LAMP-2 expression. Finally in fibroblasts of two juvenile neuronal ceroid lipofuscinosis patients elevated levels of LAP/ACP2 were found. Both activation of gene transcription and increased protein half-life appear to contribute to increased LAP/ACP2 protein expression in CLN3-deficient cells. The data suggest that lysosomal dysfunction and accumulation of storage material require increased biogenesis of LAP/ACP2 and LAMP-2 positive membranes which makes LAP/ACP2 suitable as biomarker of Batten disease.

UI MeSH Term Description Entries
D007425 Intracellular Membranes Thin structures that encapsulate subcellular structures or ORGANELLES in EUKARYOTIC CELLS. They include a variety of membranes associated with the CELL NUCLEUS; the MITOCHONDRIA; the GOLGI APPARATUS; the ENDOPLASMIC RETICULUM; LYSOSOMES; PLASTIDS; and VACUOLES. Membranes, Intracellular,Intracellular Membrane,Membrane, Intracellular
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
D008297 Male Males
D008562 Membrane Glycoproteins Glycoproteins found on the membrane or surface of cells. Cell Surface Glycoproteins,Surface Glycoproteins,Cell Surface Glycoprotein,Membrane Glycoprotein,Surface Glycoprotein,Glycoprotein, Cell Surface,Glycoprotein, Membrane,Glycoprotein, Surface,Glycoproteins, Cell Surface,Glycoproteins, Membrane,Glycoproteins, Surface,Surface Glycoprotein, Cell,Surface Glycoproteins, Cell
D008810 Mice, Inbred C57BL One of the first INBRED MOUSE STRAINS to be sequenced. This strain is commonly used as genetic background for transgenic mouse models. Refractory to many tumors, this strain is also preferred model for studying role of genetic variations in development of diseases. Mice, C57BL,Mouse, C57BL,Mouse, Inbred C57BL,C57BL Mice,C57BL Mice, Inbred,C57BL Mouse,C57BL Mouse, Inbred,Inbred C57BL Mice,Inbred C57BL Mouse
D009472 Neuronal Ceroid-Lipofuscinoses A group of severe neurodegenerative diseases characterized by intracellular accumulation of autofluorescent wax-like lipid materials (CEROID; LIPOFUSCIN) in neurons. There are several subtypes based on mutations of the various genes, time of disease onset, and severity of the neurological defects such as progressive DEMENTIA; SEIZURES; and visual failure. Batten Disease,Ceroid Lipofuscinosis, Neuronal, 4B, Autosomal Dominant,Ceroid-Lipofuscinosis, Neuronal,Jansky-Bielschowsky Disease,Kufs Disease,Santavuori-Haltia Disease,Spielmeyer-Vogt Disease,Adult Neuronal Ceroid Lipofuscinosis,Amaurotic Idiocy, Adult Type,Batten-Mayou Disease,Batten-Spielmeyer-Vogt Disease,CLN3-Related Neuronal Ceroid-Lipofuscinosis,CLN4A,CLN4B,Ceroid Lipofuscinosis, Neuronal 3, Juvenile,Ceroid Lipofuscinosis, Neuronal 4,Ceroid Lipofuscinosis, Neuronal, 3,Ceroid Lipofuscinosis, Neuronal, 4A, Autosomal Recessive,Ceroid Lipofuscinosis, Neuronal, Parry Type,Ceroid Storage Disease,Infantile Neuronal Ceroid Lipofuscinosis,Juvenile Batten Disease,Juvenile Cerebroretinal Degeneration,Juvenile Neuronal Ceroid Lipofuscinosis,Kuf's Disease,Kufs Disease Autosomal Recessive,Kufs Disease, Autosomal Dominant,Kufs Disease, Autosomal Recessive,Kufs Type Neuronal Ceroid Lipofuscinosis,Late-Infantile Neuronal Ceroid Lipofuscinosis,Lipofuscin Storage Disease,Lipofuscinosis, Neuronal Ceroid,Neuronal Ceroid Lipofuscinosis,Neuronal Ceroid Lipofuscinosis Juvenile Type,Neuronal Ceroid Lipofuscinosis, Adult,Neuronal Ceroid Lipofuscinosis, Adult Type,Neuronal Ceroid Lipofuscinosis, Infantile,Neuronal Ceroid Lipofuscinosis, Juvenile,Neuronal Ceroid Lipofuscinosis, Late Infantile,Neuronal Ceroid Lipofuscinosis, Late-Infantile,Neuronal Ceroid-Lipofuscinosis,Spielmeyer-Sjogren Disease,Vogt Spielmeyer Disease,Vogt-Spielmeyer Disease,Batten Disease, Juvenile,Batten Diseases, Juvenile,Batten Mayou Disease,Batten Spielmeyer Vogt Disease,CLN3 Related Neuronal Ceroid Lipofuscinosis,CLN3-Related Neuronal Ceroid-Lipofuscinoses,CLN4As,Cerebroretinal Degeneration, Juvenile,Cerebroretinal Degenerations, Juvenile,Ceroid Lipofuscinosis, Neuronal,Ceroid Storage Diseases,Ceroid-Lipofuscinosis, CLN3-Related Neuronal,Disease, Ceroid Storage,Disease, Juvenile Batten,Disease, Kuf's,Disease, Lipofuscin Storage,Disease, Spielmeyer-Sjogren,Disease, Vogt Spielmeyer,Disease, Vogt-Spielmeyer,Jansky Bielschowsky Disease,Juvenile Batten Diseases,Juvenile Cerebroretinal Degenerations,Kuf Disease,Lipofuscin Storage Diseases,Neuronal Ceroid Lipofuscinoses,Neuronal Ceroid-Lipofuscinoses, CLN3-Related,Neuronal Ceroid-Lipofuscinosis, CLN3-Related,Santavuori Haltia Disease,Spielmeyer Disease, Vogt,Spielmeyer Sjogren Disease,Spielmeyer Vogt Disease,Storage Disease, Ceroid,Storage Disease, Lipofuscin
D001921 Brain The part of CENTRAL NERVOUS SYSTEM that is contained within the skull (CRANIUM). Arising from the NEURAL TUBE, the embryonic brain is comprised of three major parts including PROSENCEPHALON (the forebrain); MESENCEPHALON (the midbrain); and RHOMBENCEPHALON (the hindbrain). The developed brain consists of CEREBRUM; CEREBELLUM; and other structures in the BRAIN STEM. Encephalon
D002540 Cerebral Cortex The thin layer of GRAY MATTER on the surface of the CEREBRAL HEMISPHERES that develops from the TELENCEPHALON and folds into gyri and sulci. It reaches its highest development in humans and is responsible for intellectual faculties and higher mental functions. Allocortex,Archipallium,Cortex Cerebri,Cortical Plate,Paleocortex,Periallocortex,Allocortices,Archipalliums,Cerebral Cortices,Cortex Cerebrus,Cortex, Cerebral,Cortical Plates,Paleocortices,Periallocortices,Plate, Cortical
D005260 Female Females
D005347 Fibroblasts Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules. Fibroblast

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