Effect of Botox and Vibration on Bone in Children With Cerebral Palsy

Summary

Cerebral palsy (CP) is a neuromuscular disorder that affects approximately 800,000 individuals in the U.S. An estimated 70-80% of these individuals have spasticity which affects ambulation and requires management. Therefore, the treatment of spasticity is a primary goal of interventions for children with CP. One treatment widely used to reduce spasticity is Botox because of its ability to temporarily paralyze a muscle. However, no studies have determined the effect of Botox treatment on bone in humans. Also, a low magnitude vibration treatment has been shown to improve bone structure in the lower extremity bones of children with CP. The aims of this study are: 1) to determine the effect of Botox treatment in conjunction with a daily vibration treatment on bone mass and bone structure in children with spastic CP, and 2) to identify the mechanism that underlies the effect of Botox and vibration on bone.

Timeline

Start

2012-03

Primary completion

2015-02

Completion

2015-02

Publications

• Background Johnson DL, Miller F, Subramanian P, Modlesky CM. Adipose tissue infiltration of skeletal muscle in children with cerebral palsy. J Pediatr. 2009 May;154(5):715-20. doi: 10.1016/j.jpeds.2008.10.046. Epub 2008 Dec 25.
• Background Modlesky CM, Subramanian P, Miller F. Underdeveloped trabecular bone microarchitecture is detected in children with cerebral palsy using high-resolution magnetic resonance imaging. Osteoporos Int. 2008 Feb;19(2):169-76. doi: 10.1007/s00198-007-0433-x. Epub 2007 Oct 26.
• Background Rubin C, Turner AS, Muller R, Mittra E, McLeod K, Lin W, Qin YX. Quantity and quality of trabecular bone in the femur are enhanced by a strongly anabolic, noninvasive mechanical intervention. J Bone Miner Res. 2002 Feb;17(2):349-57. doi: 10.1359/jbmr.2002.17.2.349.
• Background Judex S, Boyd S, Qin YX, Turner S, Ye K, Muller R, Rubin C. Adaptations of trabecular bone to low magnitude vibrations result in more uniform stress and strain under load. Ann Biomed Eng. 2003 Jan;31(1):12-20. doi: 10.1114/1.1535414.
• Background Wren TA, Lee DC, Hara R, Rethlefsen SA, Kay RM, Dorey FJ, Gilsanz V. Effect of high-frequency, low-magnitude vibration on bone and muscle in children with cerebral palsy. J Pediatr Orthop. 2010 Oct-Nov;30(7):732-8. doi: 10.1097/BPO.0b013e3181efbabc.
• Background Ward K, Alsop C, Caulton J, Rubin C, Adams J, Mughal Z. Low magnitude mechanical loading is osteogenic in children with disabling conditions. J Bone Miner Res. 2004 Mar;19(3):360-9. doi: 10.1359/JBMR.040129. Epub 2004 Jan 27.
• Results Modlesky CM, Whitney DG, Singh H, Barbe MF, Kirby JT, Miller F. Underdevelopment of trabecular bone microarchitecture in the distal femur of nonambulatory children with cerebral palsy becomes more pronounced with distance from the growth plate. Osteoporos Int. 2015 Feb;26(2):505-12. doi: 10.1007/s00198-014-2873-4. Epub 2014 Sep 9.
• Results Modlesky CM, Whitney DG, Carter PT, Allerton BM, Kirby JT, Miller F. The pattern of trabecular bone microarchitecture in the distal femur of typically developing children and its effect on processing of magnetic resonance images. Bone. 2014 Mar;60:1-7. doi: 10.1016/j.bone.2013.11.009. Epub 2013 Nov 20.
• Singh H, Whitney DG, Knight CA, Miller F, Manal K, Kolm P, Modlesky CM. Site-Specific Transmission of a Floor-Based, High-Frequency, Low-Magnitude Vibration Stimulus in Children With Spastic Cerebral Palsy. Arch Phys Med Rehabil. 2016 Feb;97(2):218-23. doi: 10.1016/j.apmr.2015.08.434. Epub 2015 Sep 21.

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