Central Pain Processing in Chronic Chemotherapy-Induced Peripheral Neuropathy: A Functional Magnetic Resonance Imaging StudyReport as inadecuate




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Life expectancy in multiple myeloma has significantly increased. However, a high incidence of chemotherapy induced peripheral neuropathy CIPN can negatively influence quality of life during this period. This study applied functional magnetic resonance imaging fMRI to compare areas associated with central pain processing in patients with multiple myeloma who had chemotherapy induced peripheral neuropathy MM-CIPN with those from healthy volunteers HV. Twenty-four participants n = 12 MM-CIPN, n = 12 HV underwent Blood Oxygen Level-Dependent BOLD fMRI at 3T whilst noxious heat-pain stimuli were applied to the foot and then thigh. Patients with MM-CIPN demonstrated greater activation during painful stimulation in the precuneus compared to HV p = 0.014, FWE-corrected. Patients with MM-CIPN exhibited hypo-activation of the right superior frontal gyrus compared to HV p = 0.031, FWE-corrected. Significant positive correlation existed between the total neuropathy score reduced version and activation in the frontal operculum close to insular cortex during foot stimulation in patients with MM-CIPN p = 0.03, FWE-corrected; adjusted R2 = 0.87. Painful stimuli delivered to MM-CIPN patients evoke differential activation of distinct cortical regions, reflecting a unique pattern of central pain processing compared with healthy volunteers. This characteristic activation pattern associated with pain furthers the understanding of the pathophysiology of painful chemotherapy induced peripheral neuropathy. Functional MRI provides a tool for monitoring cerebral changes during anti-cancer and analgesic treatment.



Author: Elaine G. Boland , Dinesh Selvarajah, Mike Hunter, Yousef Ezaydi, Solomon Tesfaye, Sam H. Ahmedzai, John A. Snowden, Iain D. Wilk

Source: http://plos.srce.hr/



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