Iles. In spite of disappointing results reported in this field, the challenge of identifying predictors of benefit from antiangiogenic drugs still represents a hot topic, with increasing consequences on clinical practice. In fact, two phase III randomized trials, ML18147 [24] and BEBYP [25], have recently demonstrated the efficacy of prosecuting BV beyond disease progression in mCRC patients, thus making this field even more complicated.These achievements open the way to new questions about the meaning of traditional clinical progression and its biologic mechanisms while underlining the need for biomarkers of acquired resistance to BV.Supporting InformationTable S1 Multivariable Cox regression models for PFSand OS. (DOCX)Author ContributionsConceived and designed the experiments: FL CC AF HJL. Performed the experiments: FL TW WZ AR PB LB. Analyzed the data: FL CC DY AF HJL. Contributed reagents/materials/analysis tools: FL CC LS MS CA GA S. Lonardi S. Lucchesi FD FG MR GT. Wrote the paper: FL CC AF HJL.
Pain is normally a transitory unpleasant sensation subsequent to a noxious or potentially injurious stimulus, acting as a warning system for tissue protection against injuries. It is a complex experience that involves not only the transduction of noxious environmental stimuli, but also cognitive and emotional processing by the brain [1,2]. Some circumstances, such as Title Loaded From File inflammatory or neuropathic conditions, may lead to alterations of the pain pathway, leading to hypersensitivity, and the pain becomes chronic and debilitating. Indeed, hypersensitivity to heat, cold and mechanical stimuli are well documented symptoms of inflammatory and neuropathic pain [2,3]. Several molecules and signaling pathways that contribute for noxious stimuli detection have already been characterized [1]. Among them, the transient receptor potential (TRP) ion channels appear to be molecular gateways in the sensory system [4]. In the field of pain, the subset of thermo-TRPs, mainly TRPV1 andTRPA1, seems to be important for initiation and maintenance of sensory nerve impulses that lead to nociception [5]. TRPA1 is a non-selective cation channel, expressed in primary sensory fibers that also express TRPV1. Around 97 of the TRPA1-expressing neurons also express TRPV1, while only 30 of fibers expressing TRPV1 also express TRPA1 [6,7]. TRPA1 channels play a role in transduction of chemical and physical stimuli into electric nerve signals [8], being activated by irritant chemicals such as allylisothiocyanate from mustard oil, allicin from garlic, cinnamaldehyde from cinnamon and formalin [9,10,11,12]. It is also a cold sensor, activated by temperatures below 17uC [7]. Inflammatory mediators such as bradykinin and prostaglandins can also indirectly activate TRPA1, thus, this channel is expected to be activated in inflammatory conditions [13]. Indeed, TRPA1 responses are increased in acute inflammatory process induced by Complete Freund’s Adjuvant (CFA) and this channel seems to be important in the maintenance of mechanical hypersensitivity [13,14,15,16]. Thus, inflammatoryS-(+)-Dicentrine Induces Antinociceptionsensitization of TRPA1 may Title Loaded From File underlie 23977191 some components of inflammatory hypersensitivity, particularly to mechanical and cold stimuli [16,17]. Several studies demonstrate that TRPA1 is involved in cold pain transduction, more specifically in pathophysiological cold hypersensitivity, since the use of TRPA1 antisense oligodeoxynucleotide reverses the cold hypersensitivi.Iles. In spite of disappointing results reported in this field, the challenge of identifying predictors of benefit from antiangiogenic drugs still represents a hot topic, with increasing consequences on clinical practice. In fact, two phase III randomized trials, ML18147 [24] and BEBYP [25], have recently demonstrated the efficacy of prosecuting BV beyond disease progression in mCRC patients, thus making this field even more complicated.These achievements open the way to new questions about the meaning of traditional clinical progression and its biologic mechanisms while underlining the need for biomarkers of acquired resistance to BV.Supporting InformationTable S1 Multivariable Cox regression models for PFSand OS. (DOCX)Author ContributionsConceived and designed the experiments: FL CC AF HJL. Performed the experiments: FL TW WZ AR PB LB. Analyzed the data: FL CC DY AF HJL. Contributed reagents/materials/analysis tools: FL CC LS MS CA GA S. Lonardi S. Lucchesi FD FG MR GT. Wrote the paper: FL CC AF HJL.
Pain is normally a transitory unpleasant sensation subsequent to a noxious or potentially injurious stimulus, acting as a warning system for tissue protection against injuries. It is a complex experience that involves not only the transduction of noxious environmental stimuli, but also cognitive and emotional processing by the brain [1,2]. Some circumstances, such as inflammatory or neuropathic conditions, may lead to alterations of the pain pathway, leading to hypersensitivity, and the pain becomes chronic and debilitating. Indeed, hypersensitivity to heat, cold and mechanical stimuli are well documented symptoms of inflammatory and neuropathic pain [2,3]. Several molecules and signaling pathways that contribute for noxious stimuli detection have already been characterized [1]. Among them, the transient receptor potential (TRP) ion channels appear to be molecular gateways in the sensory system [4]. In the field of pain, the subset of thermo-TRPs, mainly TRPV1 andTRPA1, seems to be important for initiation and maintenance of sensory nerve impulses that lead to nociception [5]. TRPA1 is a non-selective cation channel, expressed in primary sensory fibers that also express TRPV1. Around 97 of the TRPA1-expressing neurons also express TRPV1, while only 30 of fibers expressing TRPV1 also express TRPA1 [6,7]. TRPA1 channels play a role in transduction of chemical and physical stimuli into electric nerve signals [8], being activated by irritant chemicals such as allylisothiocyanate from mustard oil, allicin from garlic, cinnamaldehyde from cinnamon and formalin [9,10,11,12]. It is also a cold sensor, activated by temperatures below 17uC [7]. Inflammatory mediators such as bradykinin and prostaglandins can also indirectly activate TRPA1, thus, this channel is expected to be activated in inflammatory conditions [13]. Indeed, TRPA1 responses are increased in acute inflammatory process induced by Complete Freund’s Adjuvant (CFA) and this channel seems to be important in the maintenance of mechanical hypersensitivity [13,14,15,16]. Thus, inflammatoryS-(+)-Dicentrine Induces Antinociceptionsensitization of TRPA1 may underlie 23977191 some components of inflammatory hypersensitivity, particularly to mechanical and cold stimuli [16,17]. Several studies demonstrate that TRPA1 is involved in cold pain transduction, more specifically in pathophysiological cold hypersensitivity, since the use of TRPA1 antisense oligodeoxynucleotide reverses the cold hypersensitivi.
