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Title: Structural and Genetic Studies Demonstrate Neurologic Dysfunction in Triosephosphate Isomerase Deficiency Is Associated with Impaired Synaptic Vesicle Dynamics

Journal Article · · PLoS Genetics

Triosephosphate isomerase (TPI) deficiency is a poorly understood disease characterized by hemolytic anemia, cardiomyopathy, neurologic dysfunction, and early death. TPI deficiency is one of a group of diseases known as glycolytic enzymopathies, but is unique for its severe patient neuropathology and early mortality. The disease is caused by missense mutations and dysfunction in the glycolytic enzyme, TPI. Previous studies have detailed structural and catalytic changes elicited by disease-associated TPI substitutions, and samples of patient erythrocytes have yielded insight into patient hemolytic anemia; however, the neuropathophysiology of this disease remains a mystery. This study combines structural, biochemical, and genetic approaches to demonstrate that perturbations of the TPI dimer interface are sufficient to elicit TPI deficiency neuropathogenesis. The present study demonstrates that neurologic dysfunction resulting from TPI deficiency is characterized by synaptic vesicle dysfunction, and can be attenuated with catalytically inactive TPI. Collectively, our findings are the first to identify, to our knowledge, a functional synaptic defect in TPI deficiency derived from molecular changes in the TPI dimer interface.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
DOE Contract Number:
SC00112704
OSTI ID:
1354340
Report Number(s):
BNL-112856-2016-JA
Journal Information:
PLoS Genetics, Vol. 12, Issue 3; ISSN 1553-7404
Publisher:
Public Library of Science
Country of Publication:
United States
Language:
English

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Cited By (5)

Low catalytic activity is insufficient to induce disease pathology in triosephosphate isomerase deficiency. text January 2020
Medical and Veterinary Importance of the Moonlighting Functions of Triosephosphate Isomerase journal February 2019
Bone marrow transplantation corrects haemolytic anaemia in a novel ENU mutagenesis mouse model of TPI deficiency journal April 2018
Low catalytic activity is insufficient to induce disease pathology in triosephosphate isomerase deficiency journal June 2019
Low catalytic activity is insufficient to induce disease pathology in triosephosphate isomerase deficiency. text January 2020

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