Article Title: Pathogenic exon-trapping by SVA retrotransposon and rescue in Fukuyama muscular dystrophy
Figure Lengend Snippet: An SVA retrotransposal insertion induces abnormal splicing in FCMD a, Expression analysis of various regions of fukutin mRNA in lymphoblasts. Gray bar, the ratio of RT-PCR product in FCMD patients relative to the normal control; Numbers on the X axis, nucleotide positions of both forward and reverse primers in fukutin . Error bars, s.e.m. b, Long range PCR using primers flanking the expression-decreasing area (nucleotide position 1061 to 5941) detected a 3-kb PCR product in FCMD lymphoblast cDNA (open arrow) and 8-kb product in FCMD genomic DNA (closed arrow). In the normal control, cDNA and genomic DNA both showed 5-kb PCR products. The 8-kb band was weak probably because VNTR region of SVA is GC-rich (82%). c, Schematic representation of genomic DNA and cDNA in FCMD. Black and white arrows, forward and reverse sequencing primers. The intronic sequence in FCMD is indicated in lower case. The authentic stop codon is colored in red, and the new stop codon is colored in blue. d, e, Northern blot analysis of fukutin in human lymphoblasts ( d ) and model mice ( e ). F, FCMD; N, nomal control. The wild-type mouse fukutin mRNA was detected at a size of 6.1 kb. Both skeletal muscle (left) and brain (right) showed smaller, abnormal bands (open arrows) in Hp/Hp mice. Wt, wild type; Hn, Hn/Hn mice; Hp, Hp/Hp mice. f, Schematic representation of genomic DNA and cDNA in ARH ( LDLRAP1 , left), NLSDM ( PNPLA2 , middle), and human ( AB627340 , right).
Article Snippet: To detect abnormally-spliced RT-PCR products from FCMD, ARH, and NLSDM patients, and from human brain AB627340 cDNA, long range PCR was performed using LA Taq with LA Taq Buffer II (Takara), adding dimethyl sulfoxide and 7-deaza-dGTP (Roche).
Techniques: Expressing, Reverse Transcription Polymerase Chain Reaction, Polymerase Chain Reaction, Sequencing, Northern Blot, Mouse Assay