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At least 199 records · Page 11Linked to original sources
PubMed1992

Identification of a new DMD gene deletion by ectopic transcript analysis.

The detailed genetic analysis of the Duchenne/Becker muscular dystrophy gene is hindered by the large number of exons involved and their separation by huge introns. These problems can be overcome by the analysis of mRNA rather than genomic DNA and ectopic transcripts derived from peripheral blood lymphocytes provide a convenient source of material. Using reverse transcription and nested PCR, we show here a comprehensive strategy for the rapid and complete analysis of the coding sequences from complex genes and illustrate its potential by the identification of a hitherto undescribed single exon deletion.

Base Sequence↗
PubMedDate not supplied

Mapping undetected mutations within a gene-evidence for two preferential regions in the DMD gene.

A maximum-likelihood method is developed to estimate the frequency distribution of undetected mutations (presumably point mutations, small deletions, insertions) along a gene, where the gene extends over a long stretch of DNA. In each family, the point of the mutation is potentially at a different location within the gene. In this sense, there is genetic heterogeneity among families and the method estimates the proportion of families whose mutation is at (or in the vicinity of) a given point inside the gene. Our method is applied to a sample of 75 families with Duchenne muscular dystrophy in which the disease mutation remained undetected. We find two preferential regions for these undetected mutations, with an estimated 85% of families having their mutation in one region and the remaining 15% of families in the other. The new method is expected to be useful in finding small mutations in any of the currently known large genes.

Chromosome Mapping↗
PubMed1980

Dynamic gait electromyography study in Duchenne muscular dystrophy (DMD) patients.

Preoperative and postoperative dynamic gait electromyography (EMG) weas performed on 15 patients 8 to 13 year of age with Duchenne's muscular dystrophy who underwent Achilles tendon lengthening and posterior tibial tendon transfer anteriorly through the interosseous ligament for correction of equinus and equinovarus foot deformities. The muscles tested preoperatively (anterior tibial, soleus, gastrocnemius, posterior tibial, peroneal longus, and peroneal brevis) showed phase changes. It is believed that patients with weakened leg muscles fire multiple muscle groups out of phase in an attempt to overcome the action of the stronger muscles, thus stabilizing the limb for ambulation. Postoperative EMGs, performed with the patients walking in long leg braces after the deformity had been corrected, showed little activity in the muscles tested. As the patients became dependent on the brace, the need for the muscles to be active out of phase was eliminated. The transferred posterior tibial muscle appeared to be active both clinically and electromyographically.

Achilles Tendon↗
PubMed2002

George Franklin Grant, DMD: renaissance man.

While George Franklin Grant may be known as the second African American dental graduate and the inventor of the golf tee, it is not generally known that he was one of the pioneers in cleft palate and speech therapy, a longtime faculty member of Harvard University's dental school, and the founder of the Harvard Odontological Society.

Dentistry, Operative↗