Universität zu Köln

Strathmann, Eike A., Peters, Miriam, Hosseinibarkooie, Seyyedmohsen, Rigo, Frank W., Bennett, C. Frank, Zaworski, Phillip G., Chen, Karen S., Nothnagel, Michael ORCID: 0000-0001-8305-7114 and Wirth, Brunhilde ORCID: 0000-0003-4051-5191 (2018). Evaluation of potential effects of Plastin 3 overexpression and low-dose SMN-antisense oligonucleotides on putative biomarkers in spinal muscular atrophy mice. PLoS One, 13 (9). SAN FRANCISCO: PUBLIC LIBRARY SCIENCE. ISSN 1932-6203

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Abstract

Objectives Spinal muscular atrophy (SMA) is a devastating motor neuron disorder caused by homozygous loss of the survival motor neuron 1 (SMN1) gene and insufficient functional SMN protein produced by the SMN2 copy gene. Additional genetic protective modifiers such as Plastin 3 (PLS3) can counteract SMA pathology despite insufficient SMN protein. Recently, Spinraza, an SMN antisense oligonucleotide (ASO) that restores full-length SMN2 transcripts, has been FDA- and EMA-approved for SMA therapy. Hence, the availability of biomarkers allowing a reliable monitoring of disease and therapy progression would be of great importance. Our objectives were (i) to analyse the feasibility of SMN and of six SMA biomarkers identified by the BforSMA study in the Taiwanese SMA mouse model, (ii) to analyse the effect of PLS3 overexpression on these biomarkers, and (iii) to assess the impact of low dose SMN-ASO therapy on the level of SMN and the six biomarkers. Methods At P10 and P21, the level of SMN and six putative biomarkers were compared among SMA, heterozygous and wild type mice, with or without PLS3 overexpression, and with or without presymptomatic low-dose SMN-ASO subcutaneous injection. SMN levels were measured in whole blood by ECL immunoassay and of six SMA putative biomarkers, namely Cartilage Oligomeric Matrix Protein (COMP), Dipeptidyl Peptidase 4 (DPP4), Tetranectin (C-type Lectin Family 3 Member B, CLEC3B), Osteopontin (Secreted Phosphoprotein 1, SPP1), Vitronectin (VTN) and Fetuin A (Alpha 2-HS Glycoprotein, AHSG) in plasma. Results SMN levels were significantly discernible between SMA, heterozygous and wild type mice. However, no significant differences were measured upon low-dose SMN-ASO treatment compared to untreated animals. Of the six biomarkers, only COMP and DPP4 showed high and SPP1 moderate correlation with the SMA phenotype. PLS3 overexpression neither influenced the SMN level nor the six biomarkers, supporting the hypothesis that PLS3 acts as an independent protective modifier.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Strathmann, Eike A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Peters, Miriam UNSPECIFIED UNSPECIFIED UNSPECIFIED Hosseinibarkooie, Seyyedmohsen UNSPECIFIED UNSPECIFIED UNSPECIFIED Rigo, Frank W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bennett, C. Frank UNSPECIFIED UNSPECIFIED UNSPECIFIED Zaworski, Phillip G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Chen, Karen S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Nothnagel, Michael UNSPECIFIED orcid.org/0000-0001-8305-7114 UNSPECIFIED Wirth, Brunhilde UNSPECIFIED orcid.org/0000-0003-4051-5191 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-173136
DOI:	10.1371/journal.pone.0203398
Journal or Publication Title:	PLoS One
Volume:	13
Number:	9
Date:	2018
Publisher:	PUBLIC LIBRARY SCIENCE
Place of Publication:	SAN FRANCISCO
ISSN:	1932-6203
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Biology > Institute for Genetics
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language OLIGOMERIC MATRIX PROTEIN; MOTOR-NEURON PROTEIN; MOUSE MODEL; SERUM FETUIN; CARTILAGE; SURVIVAL; BONE; OSTEOPONTIN; TETRANECTIN; EXPRESSION Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17313