Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/138910
Title: LOSS-OF-FUNCTION MUTATIONS IN CARBOXYPEPTIDASE D CAUSE A NEW SYNDROME WITH LYMPHEDEMA AND SENSORINEURAL HEARING LOSS
Authors: LAUPHEIMER SIMONE
Keywords: CPD, Lymphedema,human patients, cpda, zebrafish, knockout
Issue Date: 3-Aug-2017
Citation: LAUPHEIMER SIMONE (2017-08-03). LOSS-OF-FUNCTION MUTATIONS IN CARBOXYPEPTIDASE D CAUSE A NEW SYNDROME WITH LYMPHEDEMA AND SENSORINEURAL HEARING LOSS. ScholarBank@NUS Repository.
Abstract: Lymphedema is the consequence of inefficient uptake and/or reduced lymph flow, which leads to the accumulation of high-protein fluid beneath the skin and chronic swelling of extremities. Here, we report three individuals diagnosed with a new recessive syndrome presenting with progressive lymphedema and sensorineural hearing loss (SNHL). Whole-exome sequencing identified causative mutations, including a protein-null allele, in CPD which encodes for Carboxypeptidase D. We successfully established cpda knock-out zebrafish lines, which revealed severe developmental defects in the lymphatic system. Resulting in the development of lymphedema, successfully modelling the patient phenotype. CPD is a circulating protease which hydrolyses proteins with a lysine or arginine at their C-terminus. To date, no endogenous substrates for CPD have been identified. Using patient-derived primary cells and our zebrafish knockout animals, we aim to understand the pathogenesis of this new disease to develop CPD as a potential therapeutic for the treatment of lymphedema.
URI: http://scholarbank.nus.edu.sg/handle/10635/138910
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