Collard 2018 Mol Cell Biol

From Bioblast
Jump to: navigation, search
Publications in the MiPMap
Collard R, Majtan T, Park I, Kraus JP (2018) Import of TAT-conjugated propionyl coenzyme A carboxylase using models of propionic acidemia. Mol Cell Biol 38. pii: e00491-17.

» PMID: 29378828

Collard R, Majtan T, Park I, Kraus JP (2018) Mol Cell Biol

Abstract: Propionic acidemia is caused by a deficiency of the enzyme propionyl coenzyme A carboxylase (PCC) located in the mitochondrial matrix. Cell-penetrating peptides, including transactivator of transcription (TAT), offer a potential to deliver a cargo into the mitochondrion. Here, we investigated the delivery of an α6β6 PCC enzyme into mitochondria using the HIV TAT peptide at several levels: into isolated mitochondria, in patient fibroblast cells, and in a mouse model. Results from Western blots and enzyme activity assays confirmed the import of TAT-PCC into mitochondria, as well as into patient fibroblasts, where the colocalization of imported TAT-PCC and mitochondria was also confirmed by confocal fluorescence microscopy. Furthermore, a single-dose intraperitoneal injection into PCC-deficient mice decreased the propionylcarnitine/acetylcarnitine (C3/C2) ratio toward the normal level. These results show that a cell-penetrating peptide can deliver active multimeric enzyme into mitochondria in vitro, in situ, and in vivo and push the size limit of intracellular delivery achieved so far. Our results are promising for other mitochondrion-specific deficiencies.


Bioblast editor: Kandolf G O2k-Network Lab: US CO Denver Van Hove J


Labels: MiParea: Respiration  Pathology: Inherited 

Organism: Mouse  Tissue;cell: Liver  Preparation: Isolated mitochondria 



HRR: Oxygraph-2k 

Labels, 2018-03