Brain perfusion in fibromyalgia patients and its differences between responders and poor responders to gabapentin
نویسندگان
چکیده
INTRODUCTION The aim of the present study was to determine the brain areas associated with fibromyalgia, and whether pretreatment regional cerebral blood flow (rCBF) can predict response to gabapentin treatment. METHODS A total of 29 women with fibromyalgia and 10 healthy women (without pain) matched for age were finally enrolled in the study. Technetium-99m ethyl cysteinate dimer single photon emission computed tomography ((99m)Tc-ECD SPECT) was performed in the fibromyalgia patients and controls. A voxel-by-voxel group analysis was performed using Statistic Parametric Mapping 5 (SPM5). After treatment with gabapentin, 16 patients were considered 'responders', with decrease in pain of greater than 50% as evaluated by visual analogue scale (VAS). The remaining 13 patients were considered 'poor responders'. RESULTS We observed rCBF abnormalities, compared to control subjects, in fibromyalgia including hypoperfusion in the left culmen and hyperperfusion in the right precentral gyrus, right posterior cingulate, right superior occipital gyrus, right cuneus, left inferior parietal lobule, right middle temporal gyrus, left postcentral gyrus, and left superior parietal lobule. Compared to responders, poor responders exhibited hyperperfusion in the right middle temporal gyrus, left middle frontal gyrus, left superior frontal gyrus, right postcentral gyrus, right precuneus, right cingulate, left middle occipital gyrus, and left declive. The right middle temporal gyrus, left superior frontal gyrus, right precuneus, left middle occipital gyrus, and left declive exhibited high positive likelihood ratios. CONCLUSIONS The present study revealed brain regions with significant hyperperfusion associated with the default-mode network, in addition to abnormalities in the sensory dimension of pain processing and affective-attentional areas in fibromyalgia patients. Furthermore, hyperperfusion in these areas was strongly predictive of poor response to gabapentin.
منابع مشابه
Flexible Multi-dose GnRH Antagonist versus Long GnRH Agonist Protocol in Poor Responders: A Randomized Controlled Trial
Background To compare a flexible, multi-dose GnRH antagonist protocol with a long GnRH .agonist protocol in poor respo MaterialsAndMethods A randomized clinical trial of 70 poor responder patients (35 patients in GnRH antagonist protocol and 35 patients in long GnRH agonist protocol) was performed at Royan Institute, Tehran, Iran. Both groups were given a fixed dose of human menopausal gonadotr...
متن کاملCorrelation Between Soluble Vascular Endothelial Growth Factor A, Its Receptor 1 And Response To Chemotherapy In Acute Leukemia In Children
Background and Objective: Vascular endothelial growth factor (VEGF) and its receptors (VEGF-R1 and R2) are major regulators of angiogenesis. This study was designed to assess serum levels of VEGF and VEGF-R1 and their prognostic significance in newly diagnosed childhood acute leukemia. Materials and Methods: For this purpose, VEGF and VEGF-R1 were determined using enzyme linked immuno-sorba...
متن کاملنشانگرهای پاسخ تخمدانی در تحریک تخمکگذاری جهت سیکل لقاح خارج رحمی
Markers of Ovarian Response in the Induction of Ovulation for IVF Cycle S. Esmaeilzadeh [1] , M. Faramarzi [2] Received: 24/11/07 Sent for Revision: 06/03/08 Received Revised Manuscript: 27/11/08 Accepted: 16/03/09 Background and Objectives: Poor responding of ovaries to ovarian stimulating drugs is one of the most important problems in assisted reproductive technologies. The aim ...
متن کاملهورمون ضد مولری به عنوان پیشگوی پاسخ تخمدان در درمانهای مربوط به لقاح آزمایشگاهی
Background: Anti-Müllerian Hormone (AMH) is secreted from granulosa cells of growing follicles and is a useful marker of ovarian reserve. Fertility in women is determined by the quality and quantity of follicle pool and ovarian follicular reserve positively correlates with AMH. In this study we aimed to determine if AMH can predict ovarian response in IVF treatments.Methods: In this retrospecti...
متن کاملI-27: Management of Poor Responders:Current and Past Recommended Strategy
The management of poor responders in IVF cycles is extremely controversial due to their inadequate response to controlled ovarian hyperstimulation.. A low ovarian response may be idiopathic or may be associated with many different factors including age, diminished ovarian reserve, endometriosis and prior ovarian surgery, and a reported incidence 9-24% of IVF patients. Several strategies have be...
متن کامل