Palmitoyl protein thioesterase 1 (Ppt1)-deficient mouse neurons show alterations in cholesterol metabolism and calcium homeostasis prior to synaptic dysfunction. 2007

Laura Ahtiainen, and Julia Kolikova, and Aino-Liisa Mutka, and Kaisu Luiro, and Massimiliano Gentile, and Elina Ikonen, and Leonard Khiroug, and Anu Jalanko, and Outi Kopra
National Public Health Institute, Department of Molecular Medicine, Biomedicum Helsinki, PO Box 104, 00251 Helsinki, Finland.

Infantile neuronal ceroid lipofuscinosis (INCL) is a severe neurodegenerative disorder of children, characterized by selective death of neocortical neurons. To understand early disease mechanisms in INCL, we have studied Ppt1(Deltaex4) knock-out mouse neurons in culture and acute brain slices. Global transcript profiling showed deregulation of key neuronal functions in knock-out mice including cholesterol metabolism, neuronal maturation, and calcium homeostasis. Cholesterol metabolism showed major changes; sterol biosynthesis was enhanced and steady-state amounts of sterols were altered at the cellular level. Changes were also present in early maturation of Ppt1(Deltaex4) neurons indicated by increased proliferative capacity of neuronal stem cells. Knock-out neurons presented unaltered electrophysiological properties suggesting uncompromised synaptic function in young animals. However, knock-out neurons exhibited more efficient recovery from glutamate-induced calcium transients, possibly indicating neuroprotective activation. This study established that the neuronal deregulation in INCL is linked to neuronal maturation, lipid metabolism and calcium homeostasis.

UI MeSH Term Description Entries
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
D009474 Neurons The basic cellular units of nervous tissue. Each neuron consists of a body, an axon, and dendrites. Their purpose is to receive, conduct, and transmit impulses in the NERVOUS SYSTEM. Nerve Cells,Cell, Nerve,Cells, Nerve,Nerve Cell,Neuron
D009924 Organ Culture Techniques A technique for maintenance or growth of animal organs in vitro. It refers to three-dimensional cultures of undisaggregated tissue retaining some or all of the histological features of the tissue in vivo. (Freshney, Culture of Animal Cells, 3d ed, p1) Organ Culture,Culture Technique, Organ,Culture Techniques, Organ,Organ Culture Technique,Organ Cultures
D002118 Calcium A basic element found in nearly all tissues. It is a member of the alkaline earth family of metals with the atomic symbol Ca, atomic number 20, and atomic weight 40. Calcium is the most abundant mineral in the body and combines with phosphorus to form calcium phosphate in the bones and teeth. It is essential for the normal functioning of nerves and muscles and plays a role in blood coagulation (as factor IV) and in many enzymatic processes. Coagulation Factor IV,Factor IV,Blood Coagulation Factor IV,Calcium-40,Calcium 40,Factor IV, Coagulation
D002454 Cell Differentiation Progressive restriction of the developmental potential and increasing specialization of function that leads to the formation of specialized cells, tissues, and organs. Differentiation, Cell,Cell Differentiations,Differentiations, Cell
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D002784 Cholesterol The principal sterol of all higher animals, distributed in body tissues, especially the brain and spinal cord, and in animal fats and oils. Epicholesterol
D005455 Fluorescent Antibody Technique Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy. Antinuclear Antibody Test, Fluorescent,Coon's Technique,Fluorescent Antinuclear Antibody Test,Fluorescent Protein Tracing,Immunofluorescence Technique,Coon's Technic,Fluorescent Antibody Technic,Immunofluorescence,Immunofluorescence Technic,Antibody Technic, Fluorescent,Antibody Technics, Fluorescent,Antibody Technique, Fluorescent,Antibody Techniques, Fluorescent,Coon Technic,Coon Technique,Coons Technic,Coons Technique,Fluorescent Antibody Technics,Fluorescent Antibody Techniques,Fluorescent Protein Tracings,Immunofluorescence Technics,Immunofluorescence Techniques,Protein Tracing, Fluorescent,Protein Tracings, Fluorescent,Technic, Coon's,Technic, Fluorescent Antibody,Technic, Immunofluorescence,Technics, Fluorescent Antibody,Technics, Immunofluorescence,Technique, Coon's,Technique, Fluorescent Antibody,Technique, Immunofluorescence,Techniques, Fluorescent Antibody,Techniques, Immunofluorescence,Tracing, Fluorescent Protein,Tracings, Fluorescent Protein
D006624 Hippocampus A curved elevation of GRAY MATTER extending the entire length of the floor of the TEMPORAL HORN of the LATERAL VENTRICLE (see also TEMPORAL LOBE). The hippocampus proper, subiculum, and DENTATE GYRUS constitute the hippocampal formation. Sometimes authors include the ENTORHINAL CORTEX in the hippocampal formation. Ammon Horn,Cornu Ammonis,Hippocampal Formation,Subiculum,Ammon's Horn,Hippocampus Proper,Ammons Horn,Formation, Hippocampal,Formations, Hippocampal,Hippocampal Formations,Hippocampus Propers,Horn, Ammon,Horn, Ammon's,Proper, Hippocampus,Propers, Hippocampus,Subiculums

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