Human Cell Lines with NGLY1 Mutations for the Study of NGLY1 Deficiency and Therapeutic Development

Congenital disorders of glycosylation (CDGs) are a group of inborn errors characterized by abnormalities in the process of glycosylation of biomolecules. Although more than 100 different CDGs have been reported, only one has been thoroughly described, namely NGLY1 deficiency or NGLY1-CDG. NGLY1 encodes N-glycanase 1, an enzyme involved in the cytosolic degradation of misfolded glycoproteins and other glycoproteins bound for degradation.

Human Fibroblast Cell Lines with PMM2 Congenital Disorder of Glycosylation for Therapeutic Development

Congenital disorders of glycosylation (CDGs) are inherited disorders of abnormal protein glycosylation that affect multiple organ systems. More than 100 different CDGs have been described, affecting protein and lipid glycosylation. NHGRI investigators have been able to isolate fibroblasts from patients with PMM2 (phosphomannomutase)-CDG, also known at CDG type Ia, which is an inherited, broad-spectrum disorder with developmental and neurological abnormalities.

Human Cell Lines with Mannosyl Oligosaccharide Glucosidase (MOGS) Defect for the Study and Prevention of Infection

This technology includes human cell lines from patients who have genetic defects in MOGS, the gene encoding mannosyl-oligosaccharide glucosidase, causing the rare congenital disorder of glycosylation type IIb, also known as MOGS-CDG. This defects appears to impair the ability of viruses to infect a second round of cells, which can be used to study and prevent infections. This is likely related to impaired viral replication and cellular entry. This finding has implications for Ebola and Zika, as well as other viral infections.

Murine Model of Niemann-Pick Disease Type C

This technology includes a transgenic mouse model of Niemann-Pick Disease Type C (NPC), which is a rare neurodegenerative disorder, characterized by intracellular accumulation of cholesterol and gangliosides. The mouse strain, Tg(Npcl), expresses wild-type NPC1 gene under the control of the prion promoter. When combined with the NPC deficient mouse model, BALB/c npcnih/nih, also known as Npcl-/-, the transgene insertion allele rescues life expectancy of Npc1-/- mice. Npc1-/- mouse have reduced life expectancy and die around 8 weeks, making it a difficult model to be utilized.

Prematurely-Graying Mouse Line Demonstrates Regulation of Melanocyte Stem Cell Development by SOX10 (Sry-Related HMG-Box) Transcription Factor for Use in Regenerative Medicine

This technology includes transgenic mice to be used in the study of melanocyte stem cells (MSCs) for utilization in regenerative medicine. Using the melanocyte system as a model, we investigated establishment of MSCs in the hair bulge - the stem cell compartment of the hair. During embryogenesis, all melanoblasts express SOX10, but this expression is downregulated during hair follicle morphogenesis and MSC differentiation. To further study the role of SOX10, we generated transgenic mice overexpressing SOX10 in melanoblasts.

Closed-ended Linear Duplex DNA (CELiD or ceDNA) for Non-viral Gene Transfer

This technology includes an alternative source of plasmid DNA produced in eukaryotic cells for non-viral gene transfer, which represent a novel eukaryotic alternative to bacterial plasmid DNA. Once introduced into non-dividing cells, ceDNA persists and transgene expression remains stable whereas plasmid (p) DNA is lost. The ceDNA and transfection reagent complex is nonimmunogenic allowing re-administration as needed: recombinant adeno-associated virus (rMV) is immunogenic precluding repeated administration.

Treating Kidney Disorders and Diabetic Nephropathy with N-acetyl mannosamine (ManNAc)

N-acetylmannosamine (ManNAc) is a small uncharged physiological molecule that crosses membranes readily and is the natural precursor of intracellular sialic acid synthesis. NHGRI investigators discovered that ManNAc can be used for therapeutic purposes, including treating certain kidney diseases (e.g., those involving proteinuria and hematuria), resulting primarily or secondarily from hyposialylation (lack of sialic acid). Notably, ManNAc can also be used to treat diabetic nephropathy or diabetes.

Glucocerebrosidase Activators as a Treatment for Gaucher Disease

This technology is a collection of small molecule activators of a genetically defective version of the enzyme called glucocerebrosidase (GCase), which causes Gaucher disease. Gaucher disease is a rare disease affecting 1 in 40,000 babies born. Ashkenazi Jews of eastern European descent (about 1 in 800 live births) are at particular risk of carrying this genetic defect. It is caused by inherited genetic mutations in the gene that encodes GCase, which result in reduced activity of the enzyme.

Induced Pluripotent Stem Cells Derived from Patients with CEP290-associated Ciliopathies and Unaffected Family Members

Approximately one-third of non-syndromic retinal dystrophies involve a defect in a ciliary protein. Non-syndromic retinal ciliopathies include retinitis pigmentosa, cone dystrophy, cone-rod dystrophy, macular dystrophy, and Leber-congenital amaurosis (LCA). Many CEP290-LCA patients also exhibit auditory and olfactory defects. Induced pluripotent stem cells (iPS) cells were derived from patients with LCA and unaffected relatives. 
The National Eye Institute (NEI) seeks research collaborations and/or licensees for the use of these iPS cells.

Treatment of Oculocutaneous/Ocular Albinism and for Increasing Pigmentation

Albinism (also called achromia, achromasia, or achromatosis) is a congenital disorder characterized by the complete or partial absence of pigment in the skin, hair and eyes due to absence or defect in any one of a number of proteins involved in the production of melanin.  Certain forms of albinism are known to be due to mutations in tyrosine metabolism.  In oculocutaneous albinism (OCA), pigment is lacking in the eyes, skin and hair.  In ocular albinism, only the eyes lack pigment.  Patients with albinism experience varying degrees of vision loss associated with foveal h

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