SLN and Duchenne muscular dystrophy: To determine the role of SLN upregulation in DMD, we generated SLN haploinsufficient mdx:utr−/− knockout (mdx:utr−/−:sln+/−) and SLN deficient mdx:utr−/− (mdx:utr−/−:sln−/−) triple knockout (tKO) mice.