Valproic Acid and Carnitine in Patients With Spinal Muscular Atrophy

Summary

This is a multi-center trial to assess safety and efficacy of a combined regimen of oral valproic acid (VPA) and carnitine in patients with Spinal Muscular Atrophy (SMA) 2 to 17 years of age. Cohort 1 is a double-blind placebo-controlled randomized intention to treat protocol for SMA "sitters" 2 - 8 years of age. Cohort 2 is an open label protocol for SMA "standers and walkers" 3 - 17 years of age to explore responsiveness of efficacy outcomes. Outcome measures will include blood chemistries, functional testing, pulmonary function testing, electrophysiological evaluations, PedsQL quality of life assessment, quantitative assessments of survival motor neuron (SMN) mRNA from blood samples, growth and vital sign parameters. Six centers will enroll a total of 90 patients.

Timeline

Start

2005-09

Primary completion

2007-11

Completion

2007-11

Publications

• Background Brahe C, Bertini E. Spinal muscular atrophies: recent insights and impact on molecular diagnosis. J Mol Med (Berl). 1996 Oct;74(10):555-62. doi: 10.1007/s001090050059.
• Background Roberts DF, Chavez J, Court SD. The genetic component in child mortality. Arch Dis Child. 1970 Feb;45(239):33-8. doi: 10.1136/adc.45.239.33.
• Background Pearn J. Incidence, prevalence, and gene frequency studies of chronic childhood spinal muscular atrophy. J Med Genet. 1978 Dec;15(6):409-13. doi: 10.1136/jmg.15.6.409.
• Background Czeizel A, Hamula J. A hungarian study on Werdnig-Hoffmann disease. J Med Genet. 1989 Dec;26(12):761-3. doi: 10.1136/jmg.26.12.761.
• Background Emery AE. Population frequencies of inherited neuromuscular diseases--a world survey. Neuromuscul Disord. 1991;1(1):19-29. doi: 10.1016/0960-8966(91)90039-u.
• Background Merlini L, Stagni SB, Marri E, Granata C. Epidemiology of neuromuscular disorders in the under-20 population in Bologna Province, Italy. Neuromuscul Disord. 1992;2(3):197-200. doi: 10.1016/0960-8966(92)90006-r.
• Background Pearn J. Classification of spinal muscular atrophies. Lancet. 1980 Apr 26;1(8174):919-22. doi: 10.1016/s0140-6736(80)90847-8.
• Background Bromberg MB, Swoboda KJ. Motor unit number estimation in infants and children with spinal muscular atrophy. Muscle Nerve. 2002 Mar;25(3):445-7. doi: 10.1002/mus.10050.
• Background Swoboda KJ, Prior TW, Scott CB, McNaught TP, Wride MC, Reyna SP, Bromberg MB. Natural history of denervation in SMA: relation to age, SMN2 copy number, and function. Ann Neurol. 2005 May;57(5):704-12. doi: 10.1002/ana.20473.
• Background Crawford TO. From enigmatic to problematic: the new molecular genetics of childhood spinal muscular atrophy. Neurology. 1996 Feb;46(2):335-40. doi: 10.1212/wnl.46.2.335. No abstract available.
• Background Gilliam TC, Brzustowicz LM, Castilla LH, Lehner T, Penchaszadeh GK, Daniels RJ, Byth BC, Knowles J, Hislop JE, Shapira Y, et al. Genetic homogeneity between acute and chronic forms of spinal muscular atrophy. Nature. 1990 Jun 28;345(6278):823-5. doi: 10.1038/345823a0.
• Background Melki J, Lefebvre S, Burglen L, Burlet P, Clermont O, Millasseau P, Reboullet S, Benichou B, Zeviani M, Le Paslier D, et al. De novo and inherited deletions of the 5q13 region in spinal muscular atrophies. Science. 1994 Jun 3;264(5164):1474-7. doi: 10.1126/science.7910982.
• Background Monani UR, Lorson CL, Parsons DW, Prior TW, Androphy EJ, Burghes AH, McPherson JD. A single nucleotide difference that alters splicing patterns distinguishes the SMA gene SMN1 from the copy gene SMN2. Hum Mol Genet. 1999 Jul;8(7):1177-83. doi: 10.1093/hmg/8.7.1177.
• Background Campbell L, Potter A, Ignatius J, Dubowitz V, Davies K. Genomic variation and gene conversion in spinal muscular atrophy: implications for disease process and clinical phenotype. Am J Hum Genet. 1997 Jul;61(1):40-50. doi: 10.1086/513886.
• Background Lefebvre S, Burlet P, Liu Q, Bertrandy S, Clermont O, Munnich A, Dreyfuss G, Melki J. Correlation between severity and SMN protein level in spinal muscular atrophy. Nat Genet. 1997 Jul;16(3):265-9. doi: 10.1038/ng0797-265.
• Background Monani UR, Sendtner M, Coovert DD, Parsons DW, Andreassi C, Le TT, Jablonka S, Schrank B, Rossoll W, Prior TW, Morris GE, Burghes AH. The human centromeric survival motor neuron gene (SMN2) rescues embryonic lethality in Smn(-/-) mice and results in a mouse with spinal muscular atrophy. Hum Mol Genet. 2000 Feb 12;9(3):333-9. doi: 10.1093/hmg/9.3.333.
• Background Feldkotter M, Schwarzer V, Wirth R, Wienker TF, Wirth B. Quantitative analyses of SMN1 and SMN2 based on real-time lightCycler PCR: fast and highly reliable carrier testing and prediction of severity of spinal muscular atrophy. Am J Hum Genet. 2002 Feb;70(2):358-68. doi: 10.1086/338627. Epub 2001 Dec 21.
• Background Mailman MD, Heinz JW, Papp AC, Snyder PJ, Sedra MS, Wirth B, Burghes AH, Prior TW. Molecular analysis of spinal muscular atrophy and modification of the phenotype by SMN2. Genet Med. 2002 Jan-Feb;4(1):20-6. doi: 10.1097/00125817-200201000-00004.
• Background Fischer U, Liu Q, Dreyfuss G. The SMN-SIP1 complex has an essential role in spliceosomal snRNP biogenesis. Cell. 1997 Sep 19;90(6):1023-9. doi: 10.1016/s0092-8674(00)80368-2.
• Background Chang JG, Hsieh-Li HM, Jong YJ, Wang NM, Tsai CH, Li H. Treatment of spinal muscular atrophy by sodium butyrate. Proc Natl Acad Sci U S A. 2001 Aug 14;98(17):9808-13. doi: 10.1073/pnas.171105098.
• Background Andreassi C, Jarecki J, Zhou J, Coovert DD, Monani UR, Chen X, Whitney M, Pollok B, Zhang M, Androphy E, Burghes AH. Aclarubicin treatment restores SMN levels to cells derived from type I spinal muscular atrophy patients. Hum Mol Genet. 2001 Nov 15;10(24):2841-9. doi: 10.1093/hmg/10.24.2841.
• Background Brichta L, Hofmann Y, Hahnen E, Siebzehnrubl FA, Raschke H, Blumcke I, Eyupoglu IY, Wirth B. Valproic acid increases the SMN2 protein level: a well-known drug as a potential therapy for spinal muscular atrophy. Hum Mol Genet. 2003 Oct 1;12(19):2481-9. doi: 10.1093/hmg/ddg256. Epub 2003 Jul 29.
• Background Andreassi C, Angelozzi C, Tiziano FD, Vitali T, De Vincenzi E, Boninsegna A, Villanova M, Bertini E, Pini A, Neri G, Brahe C. Phenylbutyrate increases SMN expression in vitro: relevance for treatment of spinal muscular atrophy. Eur J Hum Genet. 2004 Jan;12(1):59-65. doi: 10.1038/sj.ejhg.5201102.
• Background Bohmer T, Rydning A, Solberg HE. Carnitine levels in human serum in health and disease. Clin Chim Acta. 1974 Nov 20;57(1):55-61. doi: 10.1016/0009-8981(74)90177-6. No abstract available.
• Background Brooks H, Goldberg L, Holland R, Klein M, Sanzari N, DeFelice S. Carnitine-induced effects on cardiac and peripheral hemodynamics. J Clin Pharmacol. 1977 Oct;17(10 Pt 1):561-8. doi: 10.1177/009127007701701003. No abstract available.
• Background Christiansen RZ, Bremer J. Active transport of butyrobetaine and carnitine into isolated liver cells. Biochim Biophys Acta. 1976 Nov 2;448(4):562-77. doi: 10.1016/0005-2736(76)90110-3.
• Background Lindstedt S, Lindstedt G. Distribution and Excretion of Carnitine in the Rat. Acta. Chem. Scand. 1961;15:701-702
• Background Rebouche CJ, Engel AG. Carnitine metabolism and deficiency syndromes. Mayo Clin Proc. 1983 Aug;58(8):533-40.
• Background Rebouche CJ, Paulson DJ. Carnitine metabolism and function in humans. Annu Rev Nutr. 1986;6:41-66. doi: 10.1146/annurev.nu.06.070186.000353.
• Background Igarashi N, Sato T, Kyouya S. Secondary carnitine deficiency in handicapped patients receiving valproic acid and/or elemental diet. Acta Paediatr Jpn. 1990 Apr;32(2):139-45. doi: 10.1111/j.1442-200x.1990.tb00799.x.
• Background Thurston JH, Hauhart RE. Amelioration of adverse effects of valproic acid on ketogenesis and liver coenzyme A metabolism by cotreatment with pantothenate and carnitine in developing mice: possible clinical significance. Pediatr Res. 1992 Apr;31(4 Pt 1):419-23. doi: 10.1203/00006450-199204000-00023.
• Background Tein I, DiMauro S, Xie ZW, De Vivo DC. Valproic acid impairs carnitine uptake in cultured human skin fibroblasts. An in vitro model for the pathogenesis of valproic acid-associated carnitine deficiency. Pediatr Res. 1993 Sep;34(3):281-7. doi: 10.1203/00006450-199309000-00008.
• Background Melegh B, Pap M, Morava E, Molnar D, Dani M, Kurucz J. Carnitine-dependent changes of metabolic fuel consumption during long-term treatment with valproic acid. J Pediatr. 1994 Aug;125(2):317-21. doi: 10.1016/s0022-3476(94)70218-7.
• Background Tein I, Xie ZW. Reversal of valproic acid-associated impairment of carnitine uptake in cultured human skin fibroblasts. Biochem Biophys Res Commun. 1994 Oct 28;204(2):753-8. doi: 10.1006/bbrc.1994.2523.
• Background Van Wouwe JP. Carnitine deficiency during valproic acid treatment. Int J Vitam Nutr Res. 1995;65(3):211-4.
• Background Evangeliou A, Vlassopoulos D. Carnitine metabolism and deficit--when supplementation is necessary? Curr Pharm Biotechnol. 2003 Jun;4(3):211-9. doi: 10.2174/1389201033489829.
• Background Coulter DL. Carnitine deficiency: a possible mechanism for valproate hepatotoxicity. Lancet. 1984 Mar 24;1(8378):689. doi: 10.1016/s0140-6736(84)92209-8. No abstract available.
• Background Coulter DL. Carnitine, valproate, and toxicity. J Child Neurol. 1991 Jan;6(1):7-14. doi: 10.1177/088307389100600102.
• Background Scriver C, Beautet A, Sly W, Valle D. The Metabolic Basis of Inherited Disease. New York: McGraw Hill, 1989
• Background Schaub J, Van Hoof F, Vis H. Inborn Errors of Metabolism. New York: Raven Press, 1991
• Background Standardization of Spirometry, 1994 Update. American Thoracic Society. Am J Respir Crit Care Med. 1995 Sep;152(3):1107-36. doi: 10.1164/ajrccm.152.3.7663792. No abstract available.
• Background American Thoracic Society/European Respiratory Society. ATS/ERS Statement on respiratory muscle testing. Am J Respir Crit Care Med. 2002 Aug 15;166(4):518-624. doi: 10.1164/rccm.166.4.518. No abstract available.
• Kissel JT, Scott CB, Reyna SP, Crawford TO, Simard LR, Krosschell KJ, Acsadi G, Elsheik B, Schroth MK, D'Anjou G, LaSalle B, Prior TW, Sorenson S, Maczulski JA, Bromberg MB, Chan GM, Swoboda KJ; Project Cure Spinal Muscular Atrophy Investigators' Network. SMA CARNIVAL TRIAL PART II: a prospective, single-armed trial of L-carnitine and valproic acid in ambulatory children with spinal muscular atrophy. PLoS One. 2011;6(7):e21296. doi: 10.1371/journal.pone.0021296. Epub 2011 Jul 6.
• Swoboda KJ, Scott CB, Crawford TO, Simard LR, Reyna SP, Krosschell KJ, Acsadi G, Elsheik B, Schroth MK, D'Anjou G, LaSalle B, Prior TW, Sorenson SL, Maczulski JA, Bromberg MB, Chan GM, Kissel JT; Project Cure Spinal Muscular Atrophy Investigators Network. SMA CARNI-VAL trial part I: double-blind, randomized, placebo-controlled trial of L-carnitine and valproic acid in spinal muscular atrophy. PLoS One. 2010 Aug 19;5(8):e12140. doi: 10.1371/journal.pone.0012140.

Drugs

Indications