All OIND subjects showed evidence of CNS inflammation with increased leukocytes count and protein

All OIND subjects showed evidence of CNS inflammation with increased leukocytes count and protein. An informed consent to participate in this study was given by all individuals. Characteristics of patients and control groups are summarized inTable 1. == Table 1. in patients (= 0.29,P= 0.03). According to these data, progranulin does Gemcabene calcium not likely play a major role in the pathogenesis of MS. Keywords:Multiple sclerosis, Cerebrospinal fluid (CSF), Progranulin Multiple sclerosis (MS) is considered predominantly an inflammatory autoimmune disease of the central nervous system (CNS), with myelin proteins supposed to act as autoantigens, starting with aberrant activation of specific populations of autoreactive T lymphocytes in the periphery, followed by T cell recruitment into the brain [9]. This process leads to the activation of several inflammatory molecules, which in turn cause demyelination, eventually resulting in axonal damage [5]. Nevertheless, in chronic progressive forms of MS neurodegeneration is usually prominent, as exhibited by the development of motor disability, cognitive deficits and brain atrophy. Moreover, several data support the concept that gray matter pathology may precede white matter pathology and occurs in part independently [10]. This makes conceivable that proteins already shown to be involved in more common neurodegerative diseases, such as frontotemporal lobar degeneration (FTLD) and amyotrophic lateral sclerosis (ALS) can play a role in the pathogenesis of MS. One of them, the 593 aminoacid secreted glycoprotein progranulin, is usually a possible candidate. This Gemcabene calcium molecule has recently attracted attention due to the discovery of mutations in its encoding gene (GRN) in several cases of FTLD, but Gemcabene calcium also for a possible role in inflammatory processes. In fact, despite the full length protein displays trophic properties, its proteolitically derived peptides (granulins) act as pro-inflammatory Gemcabene calcium mediators [1]. In adult CNS,GRNmRNA is usually expressed in forebrain, olfactory bulbs and spinal cord [4]. Other evidence can be found about increased levels of GRN mRNA in several inflammatory neurodegenerative disorders associated with microglial activation such as ALS [7] and virally induced CNS inflammation [6]. Neuronal death is the pathological correlate of disease progression in multiple sclerosis, but the molecular mechanisms underlying neurodegeneration are not completely comprehended. Pathological events occurring during the development of neurodegenerative disorders could have a role also in MS. For instance, abnormal hyperphosphorylation of tau is usually implicated in the aetiopathogenesis of FTLD, but there is an emerging evidence of tau-positive inclusions also in chronic progressive MS [2]. Therefore, an implication of progranulin in MS could be conceivable. Given these premises, we evaluated progranulin levels in CSF from patients with MS as compared with patients with noninflammatory neurological diseases (NIND) and with inflammatory neurological disease (OIND). Fifty-five patients with MS (15 males and 40 females, age SEM: 42.91 1.77) were consecutively recruited at the Multiple Sclerosis Center of Ospedale Maggiore Policlinico, Milan, Italy, and at the Department of Neurology of the Washington University or college, St Louis, MO, USA. All patients underwent a standard battery of examinations, including medical history, physical and neurological examinations, screening laboratory test, brain magnetic resonance imaging (MRI) and lumbar puncture (LP) at the L4/L5 or L3/L4 inter-space. All patients with MS fulfilled the McDonald’s criteria [8]. The course of MS was described as relapsing remitting (RR,n= 35, 6 males and 29 females, age SEM: 36.29 1.76), secondary progressive (SP,n= 8, 3 males and 5 females, age SEM: 53.75 5.3) or main progressive (PP,n= 12, 6 males and 6 females, age SEM: 50.42. 2.58). All patients with RRMS were in an acute phase of the disease. As control groups, 35 subjects (8 males and 27 females, imply age SEM: 47.15 2.84) with NIND, including tension type headache, depressive disorder, dizziness, ischemic stroke or small CREB4 vessel disease, main epilepsy and normal pressure hydrocephalus, 7 (4 males and 3 females, age SEM: 44.92 4.01) with OIND, including viral meningitis, optic neuritis without demyelinating lesions at MRI, and Systemic Lupus Erithematosus, and 8 controls (CON; all of them underwent lumbar puncture for subjective symptoms with no evidence of objective pathological conditions) were recruited. All these subjects were matched for ethnic background, gender and age. All NIND individuals experienced either a normal brain MRI or evidence of small vessel disease or stroke, and a CSF analysis without evidence of CNS inflammation or autoimmune process such as intrathecal immunoglobulin (Ig) production or Gemcabene calcium presence of oligoclonal Ig. All OIND subjects showed evidence of CNS inflammation with increased leukocytes count and protein. An informed consent to participate in this study was given by all.