Active clinical trials for "Peripheral Nervous System Diseases"

In the context of peripheral neuropathy, we will aim to elucidate correlates between sensory symptoms and: Sensory nerve dysfunction. Cutaneous small nerve fibre innervation density. Psychological co-morbidity. Circadian rhythm disturbance co-morbidity. Functionality and Quality of life. Patterns of human brain activity in a subset of patients that consent to participate in the FMRI (functional magnetic resonance imaging) component of PINS. 2. We will also collect blood samples in this phenotyped cohort of patients. These blood samples coupled with detailed phenotype data will investigate potential gene associations only in the development of painful neuropathy. 3. Knowledge gained from the study will be used to aid the further development of pain questionnaires, designed to detect patients with painful neuropathy. 4.Knowledge gained from the study will be invaluable in informing on-going investigations of painful peripheral neuropathy in animal models, both in our laboratory and others.

BACKGROUND Sjögren's syndrome is an autoimmune disease whose prevalence is estimated between 200 and 500 patients per 100,000 persons in France (120 to 500,000 patients). It affects women (90%) between 40 and 60 years of age and main manifestations are generalized sicca syndrome (ocular, oral, cutaneous) and arthralgia. In 20% of cases, Sjögren's syndrome is associated with peripheral neuropathies, and the most common form is painful small fiber neuropathy (SFN). SFNs are mainly featured by neuropathic pain including burns (90%), numbness (87.5%), tingling (72.5%), electric shocks (70%) and tingling (82.5%) and also autonomic disorders (50 to 70%). However, there are still important issues that deserve to be investigated by clinical and basic research. Among these issues, this study will focus on: The impact of SFN on the quality of life of patients with Sjögren's syndrome. The medico-economic impact of the SFN taking into account the repercussions on the quality of life, including professional life, usual care cost (analgesics, medical and paramedical consultations, hospitalizations or emergency). EXPECTED RESULTS Confirmation of the major impairment in the quality of life of patients with Sjogren-associated SFN Analysis of correlations to highlight or not clinical or biological factors associated with quality of life impairment. Evaluation of the cost attributed to the presence of an SFN in patients with Sjögren's syndrome and the pharmaco-economic interest of conventional therapeutic management (analgesic treatment, consultation pain) compared to the cost of more aggressive immunomodulatory treatments.

Neuropathic pain is a frequent feature of peripheral neuropathy causing a significant impact on patients' quality of life and health care costs. Not all individuals with neuropathy develop pain and it is not possible to predict who is more or less susceptible among those with similar risk exposure. Current inability to identify high-risk individuals hinders development and application of therapies to counteract neuropathic pain and to address targeted prevention strategies. Recently, the investigators Consortium has identified novel pathogenic mutations in genes encoding for two sodium channels (Nav1.7 and Nav1.8) known to play a critical role in the generation and conduction of action potentials in nociceptors and their terminal axons. This study was undertaken in a carefully selected group of patients with painful neuropathy using a candidate gene approach and directly revealed targets for new therapeutic strategies. This discover widened the spectrum of sodium channel-related pain disorders including conditions more common in the general population than those known so far. PROPANE STUDY, starting from the hypothesis of a common origin of neuropathic pain in a cohort of patients with predominantly small fibre neuropathy, aims to develop this original idea in a larger and well characterized study population, to provide evidence for the reliable stratification of patients at high risk and potential new treatments tailored on patients' clinical features, in order to improve their quality of life.

This research study aims to better understand how the plantar temperature data collected by the Podimetrics RTM System corresponds to physical activity level in subjects.

Include qualified 50 ANCA-associated vasculitis(AAV) patients; and the first 27 patients will be divided into 3 groups with different diffused tension image (DTI) parameters and to choose the best strategy； On baseline, 6 months after treatment and 24 months after treatment, the AAV patients will accomplish the Birming-ham vasculitis activity score(BVAS) besides DTI； The new serum biomarkers of AAV associated peripheral neuropathy will be measured by ELISA； (4) Another cohort with 50 patients with AAV associated peripheral neuropathy who were evaluated by traditional methods (electromyogram) and compared to the patients cohort that evaluated using DTI by cost-benefit analysis

Psychiatric comorbidities in patient with Painful Peripheral neuropathy

Patients with painful diabetic neuropathy (PDN) often combine with anxiety and depression. However, the pathogenesis of PDN is unclear, especially the mechanism associated with central nervous system. The investigators used fraction Amplitude of Low Frequency Fluctuation (fALFF) and Regional Homogeneity (ReHo) of resting-state functional Magnetic Resonance Imaging (rs-fMRI) to explore the brain activity in patients with PDN in order to study the central mechanism.The investigators evaluated the symptoms, signs and mental conditions of patients with PDN and non-pain neuropathy. The brain Blood Oxygen Level Dependent (BOLD) fMRI scan was performed in patients together with some gender and age matched healthy controls. Maybe this study can find that patients with PDN have abnormal brain activity, indicating central nervous system may contribute to painful diabetic neuropathy.

The purpose of this study is to collect clinical data, blood samples, and self reported symptoms of peripheral neuropathy from Chinese patients with breast cancer after treatment with taxanes. This data will be used to develop predictive markers for neuropathy.