Clinical Usefulness of Oral Supplementation with Alpha-Lipoic Acid, Curcumin Phytosome, and B-Group Vitamins in Patients with Carpal Tunnel Syndrome Undergoing Surgical Treatment
We investigated the clinical usefulness of oral supplementation with a combination product containing alpha-lipoic acid, curcumin phytosome, and B-group vitamins in 180 patients with carpal tunnel syndrome (CTS), scheduled to undergo surgical decompression of the median nerve. Patients in Group A ( ) served as controls and did not receive any treatment either before or after surgery. Patients in Group B ( ) received oral supplementation twice a day for 3 months both before and after surgery (totaling 6 months of supplementation). Patients in Group C ( ) received oral supplementation twice a day for 3 months before surgery only. Patients in Group B showed significantly lower nocturnal symptoms scores compared with Group A subjects at both 40 days and 3 months after surgery (both values ). Moreover, patients in Group B had a significantly lower number of positive Phalen’s tests at 3 months compared with the other study groups ( ). We conclude that oral supplementation with alpha-lipoic acid, curcumin phytosome, and B-group vitamins twice a day both before and after surgery is safe and effective in CTS patients scheduled to undergo surgical decompression of the median nerve. 1. Introduction Peripheral nerve compression syndromes (also known as tunnel syndromes or entrapment neuropathies) are common disabling conditions that occur when nerves are compressed through bony, fibrous, osteofibrous, and fibromuscular tunnels, impairing nerve function [1]. The economic and social costs of peripheral nerve compression syndromes are high due to lost working days, change of occupation, and the need for surgical intervention [2]. From a clinical standpoint, patients with carpal tunnel syndromes can present with motor, sensory, or autonomic findings, although they most show motor and sensory complaints [1, 2]. Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy in the upper extremity, with a lifetime risk of approximately 10% [3]. CTS is caused by the compression of the median nerve, which temporarily causes conduction blocks within large myelinated nerve fibers, along with the blockage of capillary blood flow to the median nerve through the swelling of the ensheathing synovial tissue of the tendons. The primary symptoms of classic CTS involve numbness and tingling with or without pain in at least two of the median nerve innervated fingers [3]. Symptoms are often aggravated during sleep and in daytime caused by static or repetitive hand function. The vast majority of cases of CTS are either idiopathic or spontaneous, presenting bilateral symptoms in
References
[1]
G. M. Rayan, “Compression neuropathies, including carpal tunnel syndrome,” Clinical Symposia, vol. 49, no. 2, pp. 2–32, 1997.
[2]
H. M. Corwin, “Compression neuropathies of the upper extremity,” Clinics in Occupational and Environmental Medicine, vol. 5, no. 2, pp. 333–352, 2005.
[3]
K. E. Leblanc and W. Cestia, “Carpal tunnel syndrome,” American Family Physician, vol. 83, no. 8, pp. 952–958, 2011.
[4]
C. Alfonso, S. Jann, R. Massa, and A. Torreggiani, “Diagnosis, treatment and follow-up of the carpal tunnel syndrome: a review,” Neurological Sciences, vol. 31, no. 3, pp. 243–252, 2010.
[5]
K. D. Bickel, “Carpal tunnel syndrome,” Journal of Hand Surgery, vol. 35, no. 1, pp. 147–152, 2010.
[6]
B. M. Huisstede, M. S. Randsdorp, J. H. Coert, S. Glerum, M. van Middelkoop, and B. W. Koes, “Carpal tunnel syndrome. part II: effectiveness of surgical treatments-a systematic review,” Archives of Physical Medicine and Rehabilitation, vol. 91, no. 7, pp. 1005–1024, 2010.
[7]
B. M. Huisstede, P. Hoogvliet, M. S. Randsdorp, S. Glerum, M. van Middelkoop, and B. W. Koes, “Carpal tunnel syndrome. Part I: effectiveness of nonsurgical treatments—a systematic review,” Archives of Physical Medicine and Rehabilitation, vol. 91, no. 7, pp. 981–1004, 2010.
[8]
K. P. Shay, R. F. Moreau, E. J. Smith, A. R. Smith, and T. M. Hagen, “Alpha-lipoic acid as a dietary supplement: molecular mechanisms and therapeutic potential,” Biochimica et Biophysica Acta, vol. 1790, no. 10, pp. 1149–1160, 2009.
[9]
G. Di Geronimo, A. F. Caccese, L. Caruso, A. Soldati, and U. Passaretti, “Treatment of carpal tunnel syndrome with alpha-lipoic acid,” European Review for Medical and Pharmacological Sciences, vol. 13, no. 2, pp. 133–139, 2009.
[10]
J. Epstein, I. R. Sanderson, and T. T. MacDonald, “Curcumin as a therapeutic agent: the evidence from in vitro, animal and human studies,” British Journal of Nutrition, vol. 103, no. 11, pp. 1545–1557, 2010.
[11]
S. K. Kulkarni and A. Dhir, “An overview of curcumin in neurological disorders,” Indian Journal of Pharmaceutical Sciences, vol. 72, no. 2, pp. 149–154, 2010.
[12]
A. Fujii, H. Matsumoto, and H. Yamamoto, “Effect of vitamin B complex on neurotransmission and neurite outgrowth,” General Pharmacology, vol. 27, no. 6, pp. 995–1000, 1996.
[13]
J. M. Ellis, K. Folkers, and M. Levy, “Response of vitamin B-6 deficiency and the carpal tunnel syndrome to pyridoxine,” Proceedings of the National Academy of Sciences of the United States of America, vol. 79, no. 23, pp. 7494–7498, 1982.
[14]
M. Ryan-Harshman and W. Aldoori, “Carpal tunnel syndrome and vitamin B6,” Canadian Family Physician, vol. 53, no. 7, pp. 1161–1162, 2007.
[15]
J. Cuomo, G. Appendino, A. S. Dern et al., “Comparative absorption of a standardized curcuminoid mixture and its lecithin formulation,” Journal of Natural Products, vol. 74, no. 4, pp. 664–669, 2011.
[16]
E. N. Davis and K. C. Chung, “The Tinel sign: a historical perspective,” Plastic and Reconstructive Surgery, vol. 114, no. 2, pp. 494–499, 2004.
[17]
J. Brüske, M. Bednarski, H. Grzelec, and A. Zyluk, “The usefulness of the phalen test and the hoffmann-tinel sign in the diagnosis of carpal tunnel syndrome,” Acta Orthopaedica Belgica, vol. 68, no. 2, pp. 141–145, 2002.
[18]
B. I. Wintman, S. C. Winters, R. H. Gelberman, and J. N. Katz, “Carpal tunnel release: correlations with preoperative symptomatology,” Clinical Orthopaedics and Related Research, no. 326, pp. 135–145, 1996.
[19]
R. M. Szabo, “Carpal tunnel syndrome as a repetitive motion disorder,” Clinical Orthopaedics and Related Research, no. 351, pp. 78–89, 1998.
[20]
A. Gor?ca, H. Huk-Kolega, A. Piechota, P. Kleniewska, E. Ciejka, and B. Skibska, “Lipoic acid—biological activity and therapeutic potential,” Pharmacological Reports, vol. 63, no. 4, pp. 849–858, 2011.
[21]
Y. L. Woo, P. Orestes, J. Latham et al., “Molecular mechanisms of lipoic acid modulation of T-type calcium channels in pain pathway,” Journal of Neuroscience, vol. 29, no. 30, pp. 9500–9509, 2009.
[22]
L. Androne, N. A. Gavan, I. A. Veresiu, and R. Orasan, “In vivo effect of lipoic acid on lipid peroxidation in patients with diabetic neuropathy,” In Vivo, vol. 14, no. 2, pp. 327–330, 2000.
[23]
I. Ford, M. A. Cotter, N. E. Cameron, and M. Greaves, “The effects of treatment with α-lipoic acid or evening primrose oil on vascular hemostatic and lipid risk factors, blood flow, and peripheral nerve conduction in the streptozotocin-diabetic rat,” Metabolism, vol. 50, no. 8, pp. 868–875, 2001.
[24]
L. J. Coppey, J. S. Gellett, E. P. Davidson, J. A. Dunlap, D. D. Lund, and M. A. Yorek, “Effect of antioxidant treatment of streptozotocin-induced diabetic rats on endoneurial blood flow, motor nerve conduction velocity, and vascular reactivity of epineurial arterioles of the sciatic nerve,” Diabetes, vol. 50, no. 8, pp. 1927–1937, 2001.
[25]
T. Esatbeyoglu, P. Huebbe, I. M. Ernst, D. Chin, A. E. Wagner, and G. Rimbach, “Curcumin—from molecule to biological function,” Angewandte Chemie, vol. 51, no. 22, pp. 5308–5332, 2012.
[26]
S. Kapoor, “Curcumin and its emerging role in pain modulation and pain management,” Korean Journal of Pain, vol. 25, no. 3, pp. 202–203, 2012.
[27]
P. Basnet and N. Skalko-Basnet, “Curcumin: an anti-inflammatory molecule from a curry spice on the path to cancer treatment,” Molecules, vol. 16, no. 6, pp. 4567–4598, 2011.
[28]
C. D. Ang, M. J. M. Alviar, A. L. Dans et al., “Vitamin B for treating peripheral neuropathy,” Cochrane Database of Systematic Reviews, no. 3, Article ID CD004573, 2008.
[29]
O. Soejima, H. Iida, and M. Naito, “Measurement of median nerve blood flow during carpal tunnel release with laser Doppler flowmetry,” Minimally Invasive Neurosurgery, vol. 44, no. 4, pp. 202–204, 2001.
[30]
M. Nagamatsu, K. K. Nickander, J. D. Schmelzer et al., “Lipoic acid improves nerve blood flow, reduces oxidative stress, and improves distal nerve conduction in experimental diabetic neuropathy,” Diabetes Care, vol. 18, no. 8, pp. 1160–1167, 1995.