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Commentary Free access | 10.1172/JCI73908

The search for treatments to reduce chemotherapy-induced peripheral neuropathy

Deirdre R. Pachman,1 Charles L. Loprinzi,1 Axel Grothey,1 and Lauren E. Ta2

1Division of Medical Oncology and 2Department of Neurology, Mayo Clinic, College of Medicine, Rochester, Minnesota, USA.

Address correspondence to: Charles L. Loprinzi, Mayo Clinic, 200 First Street, SW, Rochester, Minnesota 55905, USA. Phone: 507.284.4849; Fax: 507.284.1803; E-mail: cloprinzi@mayo.edu.

Find articles by Pachman, D. in: PubMed | Google Scholar

1Division of Medical Oncology and 2Department of Neurology, Mayo Clinic, College of Medicine, Rochester, Minnesota, USA.

Address correspondence to: Charles L. Loprinzi, Mayo Clinic, 200 First Street, SW, Rochester, Minnesota 55905, USA. Phone: 507.284.4849; Fax: 507.284.1803; E-mail: cloprinzi@mayo.edu.

Find articles by Loprinzi, C. in: PubMed | Google Scholar

1Division of Medical Oncology and 2Department of Neurology, Mayo Clinic, College of Medicine, Rochester, Minnesota, USA.

Address correspondence to: Charles L. Loprinzi, Mayo Clinic, 200 First Street, SW, Rochester, Minnesota 55905, USA. Phone: 507.284.4849; Fax: 507.284.1803; E-mail: cloprinzi@mayo.edu.

Find articles by Grothey, A. in: PubMed | Google Scholar

1Division of Medical Oncology and 2Department of Neurology, Mayo Clinic, College of Medicine, Rochester, Minnesota, USA.

Address correspondence to: Charles L. Loprinzi, Mayo Clinic, 200 First Street, SW, Rochester, Minnesota 55905, USA. Phone: 507.284.4849; Fax: 507.284.1803; E-mail: cloprinzi@mayo.edu.

Find articles by Ta, L. in: PubMed | Google Scholar

Published December 20, 2013 - More info

Published in Volume 124, Issue 1 on January 2, 2014
J Clin Invest. 2014;124(1):72–74. https://doi.org/10.1172/JCI73908.
© 2013 The American Society for Clinical Investigation
Published December 20, 2013 - Version history
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Related article:

Treatment of oxaliplatin-induced peripheral neuropathy by intravenous mangafodipir
Romain Coriat, … , François Goldwasser, Frédéric Batteux
Romain Coriat, … , François Goldwasser, Frédéric Batteux
Clinical Research and Public Health

Treatment of oxaliplatin-induced peripheral neuropathy by intravenous mangafodipir

Abstract

Background. The majority of patients receiving the platinum-based chemotherapy drug oxaliplatin develop peripheral neurotoxicity. Because this neurotoxicity involves ROS production, we investigated the efficacy of mangafodipir, a molecule that has antioxidant properties and is approved for use as an MRI contrast enhancer.

Methods. The effects of mangafodipir were examined in mice following treatment with oxaliplatin. Neurotoxicity, axon myelination, and advanced oxidized protein products (AOPPs) were monitored. In addition, we enrolled 23 cancer patients with grade ≥2 oxaliplatin-induced neuropathy in a phase II study, with 22 patients receiving i.v. mangafodipir following oxaliplatin. Neuropathic effects were monitored for up to 8 cycles of oxaliplatin and mangafodipir.

Results. Mangafodipir prevented motor and sensory dysfunction and demyelinating lesion formation. In mice, serum AOPPs decreased after 4 weeks of mangafodipir treatment. In 77% of patients treated with oxaliplatin and mangafodipir, neuropathy improved or stabilized after 4 cycles. After 8 cycles, neurotoxicity was downgraded to grade ≥2 in 6 of 7 patients. Prior to enrollment, patients received an average of 880 ± 239 mg/m2 oxaliplatin. Patients treated with mangafodipir tolerated an additional dose of 458 ± 207 mg/m2 oxaliplatin despite preexisting neuropathy. Mangafodipir responders managed a cumulative dose of 1,426 ± 204 mg/m2 oxaliplatin. Serum AOPPs were lower in responders compared with those in nonresponders.

Conclusion. Our study suggests that mangafodipir can prevent and/or relieve oxaliplatin-induced neuropathy in cancer patients.

Trial registration. Clinicaltrials.gov NCT00727922.

Funding. Université Paris Descartes, Ministère de la Recherche et de l’Enseignement Supérieur, and Assistance Publique-Hôpitaux de Paris.

Authors

Romain Coriat, Jérôme Alexandre, Carole Nicco, Laurent Quinquis, Evelyne Benoit, Christiane Chéreau, Hervé Lemaréchal, Olivier Mir, Didier Borderie, Jean-Marc Tréluyer, Bernard Weill, Joel Coste, François Goldwasser, Frédéric Batteux

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Abstract

Oxaliplatin, a commonly used chemotherapeutic agent, is associated with both acute and chronic neurotoxicity. Chronic sensory neuropathy can be dose limiting and may have detrimental effects on patients’ quality of life. Preclinical studies provide an understanding of the pathophysiology of chemotherapy-induced peripheral neuropathy (CIPN) and may be important for developing effective preventative interventions. In this issue of the JCI, Coriat and colleagues used an animal model and a human pilot trial to evaluate the use of mangafodipir to reduce CIPN. Although many pilot clinical studies have reported promising data, larger clinical trials have repeatedly been unable to confirm these preliminary results. Thus, no agents are currently clinically recommended for the prevention of CIPN.

Oxaliplatin-associated neuropathy is a substantial problem

Oxaliplatin is a commonly used platinum-based chemotherapeutic agent that frequently needs to be stopped due to neurotoxicity. The development of oxaliplatin-associated neurological symptoms can substantially affect patients’ quality of life and functional ability, and these neurologic defects can last for years in some patients (1). The benefits of this drug are constantly being weighed against the risk of permanent neurologic disorder. Consequently, there has been extensive research into methods to prevent this troublesome toxicity.

Animal data indicate that drugs can prevent CIPN

A better understanding of the pathophysiology and molecular mechanisms responsible for chemotherapy-induced peripheral neuropathy (CIPN) is important for the development of effective preventative interventions. Emerging evidence suggests that alterations in the expression or activity of antioxidants, such as glutathione reductase, catalase, and superoxide dismutases (SODs), increase the susceptibility of neurons to ROS-mediated injury, which contributes to neurotoxicity (2). Preclinical studies have shown that the platinum-based chemotherapeutic drug cisplatin generates ROS in dorsal root ganglia (DRG) neurons (3). NO, as well as other inflammatory byproducts, is capable of directly activating neuronal transient receptor potential channel A1 (TRPA1) (4), which has been shown to be upregulated in DRG and the trigeminal ganglion in vitro and in vivo following platinum drug treatment (5, 6). In addition, mitochondrial damage induced by oxidative stress has been suggested as a mechanism involved in neurotoxicity following oxaliplatin treatment (7). Recently, it has also been proposed that activation of poly(ADP-ribose) polymerase (PARP) contributes to neuroinflammation and increased oxidative stress (8).

These studies of the pathophysiology and molecular mechanisms of CIPN have led to animal studies of agents that might be able to prevent CIPN. Research in animal models of CIPN has suggested that a variety of agents can decrease neurological symptoms. Drugs demonstrating promise in animal models include PARP inhibitors (8), acetyl-L-carnitine (9), minocycline (10), glutathione (11), erythropoietin (12), and goshajinkigan (a Japanese traditional herbal medicine) (13).

In this issue of the JCI, Romain Coriat and colleagues provide support that mangafodipir can be added to the list of drugs that relieve CIPN in animals (14). Coriat et al. demonstrate that mice treated with oxaliplatin and the MRI contrast agent mangafodipir, or oxaliplatin and MnTBAP, which is a manganese chelate with SOD and catalase activities, did not develop mechanical hypersensitivity, cold hypersensitivity, or deficits in motor function (14). The results of mouse pain behavioral studies are fairly straightforward; however, the neurotoxic effects of oxaliplatin on myelinated fibers of the sciatic nerve will require further study. Coriat et al. report a decrease in myelinated fiber diameter, but no change in axon diameter following oxaliplatin treatment (14). These results would suggest that oxaliplatin reduces myelin thickness; however, myelin is not typically affected by oxaliplatin (15). Morphometric and histological studies of nerve fibers will be required to determine whether mangafodipir is neuroprotective or myelin protective.

CIPN-preventing drugs implicated in pilot studies lack benefit in larger trials

Vitamin E was one of the first compounds thought to protect against CIPN. Data supporting vitamin E for the treatment of CIPN (16–18) came from three small randomized trials with unblinded control groups (19–21) and one larger trial that included 17 patients treated with vitamin E (22). Unfortunately, a much larger randomized, placebo-controlled, double-blind clinical trial was unable to support the use of vitamin E for CIPN treatment or prevention (23).

The use of i.v. calcium and magnesium (Ca/Mg) for CIPN prevention became a common clinical practice after a report that compared a series of patients treated with i.v. Ca/Mg with a historical control group suggested that i.v. Ca/Mg decreased neuropathy by about 50% (24). Furthermore, data from a placebo-controlled, double-blind clinical trial suggested that i.v. Ca/Mg was beneficial (25); however, this trial was halted due to the errant suggestion that Ca/Mg interfered with the response rate of oxaliplatin-based chemotherapy (26, 27). As with vitamin E, a large phase III clinical trial on the use of i.v. Ca/Mg for preventing CIPN determined that this treatment was ineffective (28).

In 1990, a report in the New England Journal of Medicine indicated that an adrenocorticotropic hormone analog (ORG 2766) relieved CIPN. A total of 55 patients were involved in a three-arm study that included a placebo, a low dose of ORG 2766, and a higher dose of ORG 2766 (29). The trial authors reported a substantial improvement in neuropathy, suggesting that this therapy was effective in preventing or attenuating cisplatin neuropathy (29). A follow-up report indicated that a small subset of 18 patients from the previous study had less pronounced neurologic signs and symptoms months after finishing their chemotherapy; this report recommended that ORG 2766 be continued for up to 4 months after the last cycle of cisplatin (30). Follow-up studies by some of the same authors further reported that ORG 2766 relieved nerve damage (31). Another small trial involving 28 patients who were receiving vincristine also reported positive results (32). Despite the initially promising studies, two relatively large, well-conducted, placebo-controlled clinical trials could not correlate the use of ORG 2766 with decreased neuropathy (33, 34). Moreover, in one trial, ORG 2766 was associated with increased neuropathy (34).

Multiple small trials have reported positive results using glutathione for the prevention of cisplatin- or oxaliplatin-related CIPN (35–37). No large, definitive phase III trials have been reported to confirm or refute the ability of glutathione to prevent oxaliplatin- or cisplatin-induced CIPN; however, a relatively large randomized, placebo-controlled, double-blind trial failed to find a glutathione-associated benefit for preventing the neuropathy associated with paclitaxel/carboplatin (C.L. Loprinzi, unpublished observations).

Additionally, a small phase II study suggested that acetyl-L-carnitine could improve chemotherapy-induced neuropathic symptoms (38). Based on this study, a phase III clinical prevention trial was conducted in patients receiving paclitaxel. In this trial, acetyl-L-carnitine appeared to be associated with increased chemotherapy-induced neuropathy (39).

In the current report, Coriat et al. provide results from a phase II clinical trial using mangafodipir in patients with preexisting oxaliplatin-induced CIPN (14). The trial involved 22 patients with at least grade 2 sensory neuropathy. After 4 cycles of oxaliplatin and mangafodipir, they reported that 17 patients had stable or improved neuropathy, and after 8 cycles, 6 patients had improvement in their neuropathy grade. As oxaliplatin-induced CIPN is expected to worsen with cumulative doses, these findings do sound intriguing. Unfortunately, to date, none of the previously reported promising-appearing pilot studies have shown clinical benefit when tested in large randomized clinical trials. Thus, more work will need to be done to determine whether mangafodipir will really benefit patients with CIPN.

Perspectives and future directions

The development of CIPN is a pertinent clinical problem that needs to be addressed. It is well established that oxaliplatin-mediated neurotoxicity correlates with a cumulative oxaliplatin dose; therefore, International Duration Evaluation in the Adjuvant colon cancer (IDEA) trial, an international collaborative clinical trial, is underway to evaluate whether 3 months of oxaliplatin treatment provide the same benefit as the current standard of 6 months of adjuvant oxaliplatin–based therapy (40). This effort will eventually include about 12,000 patients worldwide and could have major implications for the long-term quality of life and functional capabilities of patients with resected colon cancer. Clearly, more work is necessary to find effective agents that will protect against CIPN and allow for the antitumor activity of neurotoxic chemotherapeutic agents.

Acknowledgments

This work was supported in part by grants NCI-CA37404 (to C.L. Loprinzi and L.E. Ta) and NIDCR-DE020868 (to L.E. Ta), and by a Karl-Erivan Haub Family Career Development Award in Cancer Research (to L.E. Ta). We apologize to the many authors whose work has not been cited due to space limitations.

Address correspondence to: Charles L. Loprinzi, Mayo Clinic, 200 First Street, SW, Rochester, Minnesota 55905, USA. Phone: 507.284.4849; Fax: 507.284.1803; E-mail: cloprinzi@mayo.edu.

Footnotes

Conflict of interest: The authors have declared that no conflict of interest exists.

Reference information: J Clin Invest. 2014;124(1):72–74. doi:10.1172/JCI73908.

See the related article at Treatment of oxaliplatin-induced peripheral neuropathy by intravenous mangafodipir.

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