A collaborative research team including a Medical College of Wisconsin (MCW) pediatric neuropathologist successfully mitigated some of the effects of a muscular disease by using a new targeted enzyme replacement therapy strategy from 4s3 Bioscience.
The findings are published in the January edition of Human and Molecular Genetics http://hmg.oxfordjournals.org/content/early/2013/01/09/hmg.ddt003.full.pdf+html.
X-linked myotubular myopathy (XLMTM) is a severe muscle disease caused by an absence of a protein called myotubularin. There is currently no treatment for this disorder, and most patients die in infancy or childhood. The overall incidence of myotubular myopathy is 1 in 50,000 live male births.
Michael W. Lawlor, MD, PhD, assistant professor of pathology at MCW, researcher at the Children’s Hospital of Wisconsin Research Institute, and director of the pediatric pathology neuromuscular laboratory in MCW’s division of pediatric pathology, coordinated a study at Boston Children’s Hospital and MCW that used targeted enzyme replacement therapy to deliver myotubularin to muscles of mice with XLMTM. After two weeks of treatment, the mice showed marked improvement in muscle function and pathology.
“These promising findings suggest that even low levels of myotubularin protein replacement can not only improve weakness in patients, but also at least partially reverse the structural abnormalities seen in XLMTM,” said Dr. Lawlor. “The next step is to determine appropriate dosage, and toxicity, before we venture into human trials,” he continued.
The study was supported by the National Institutes of Health, the Muscular Dystrophy Association, the Joshua Frase Foundation, and the Lee and Penny Anderson Family Foundation.
Co-authors of the study are Dustin Armstrong and Michael O’Callaghan from 4s3 Bioscience, Inc.; Marissa Viola, Cynthia P. Hsu, and Alan H. Beggs from Boston Children’s Hospital and Harvard Medical School; Jeffrey J. Widrick from Spaulding Rehabilitation Hospital; Hui Meng from MCW; Robert W. Grange from Virginia Tech; Martin Childers from Wake Forest University; Christopher R. Pierson from Nationwide Children’s Hospital; and Anna Buj-Bello from INSERM.
The efforts of Drs. Armstrong, Beggs, and Lawlor began while Dr. Lawlor was working for Dr. Beggs at Boston Children’s Hospital, and this collaborative effort has continued at Dr. Lawlor’s lab at MCW. As studies progress, Dr. Lawlor will continue to perform pathological analyses on research tissue from preclinical studies with the 4s3 Bioscience replacement enzyme and assist in further elucidating the pathophysiology of XLMTM. This work by Dr. Lawlor’s laboratory utilizes resources partially supported and available through the Children’s Research Institute’s Imaging Core Facility.
Your link to the biggest stories in the suburbs delivered Thursday mornings.
Enter your e-mail address above and click "Sign Up Now!" to begin receiving your e-mail newsletter Get the Newsletter!
- College seeking third-party comments for HLC accreditation
- You are invited to Esprit Poms' Pizzeria Piccola fundraiser - December 28th, 2014, 4-9pm
- St. Jude the Apostle Kindergartners Gift of Warmth Keeps Giving
- Virtual School Students Meet Classmates at Discovery World Field Trip
- Wauwatosa residents win grants through Northwestern Mutual Days of Sharing program
- Not a Good Idea to Bike?
- KNAPP CHIROPRACTIC AND WELLNESS CENTER, INC. PATIENTS GIVE OUTSTANDING TESTIMONIALS
- Milwaukee/NARI Recognizes Six Industry Advocates
- Dr. Melinda Stolley named MCW Cancer Center associate director
- WAUWATOSA DISTINGUISHED CITIZEN 2014: CALL FOR NOMINATIONS