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A novel approach to completely alleviate peripheral neuropathic pain in human patients: insights from preclinical data.
Front Neuroanat
January 2025
Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates.
Neuropathic pain is a pervasive health concern worldwide, posing significant challenges to both clinicians and neuroscientists. While acute pain serves as a warning signal for potential tissue damage, neuropathic pain represents a chronic pathological condition resulting from injury or disease affecting sensory pathways of the nervous system. Neuropathic pain is characterized by long-lasting ipsilateral hyperalgesia (increased sensitivity to pain), allodynia (pain sensation in response to stimuli that are not normally painful), and spontaneous unprovoked pain.
View Article and Find Full Text PDFIn vivo calcium imaging reveals directional sensitivity of C-low threshold mechanoreceptors.
J Physiol
January 2025
School of Life Sciences, The University of Nottingham, Queen's Medical Centre, Nottingham, UK.
C-low threshold mechanoreceptors (C-LTMRs) in animals (termed C-tactile (CT) fibres in humans) are a subgroup of C-fibre primary afferents, which innervate hairy skin and respond to low-threshold punctate indentations and brush stimuli. These afferents respond to gentle touch stimuli and are implicated in mediating pleasant/affective touch. These afferents have traditionally been studied using low-throughput, technically challenging approaches, including microneurography in humans and teased fibre electrophysiology in other mammals.
View Article and Find Full Text PDFIn vivo spontaneous Ca activity in the pre-hearing mammalian cochlea.
Nat Commun
January 2025
School of Biosciences, University of Sheffield, Sheffield, S10 2TN, UK.
The refinement of neural circuits towards mature function is driven during development by patterned spontaneous calcium-dependent electrical activity. In the auditory system, this sensory-independent activity arises in the pre-hearing cochlea and regulates the survival and refinement of the auditory pathway. However, the origin and interplay of calcium signals during cochlear development is unknown in vivo.
View Article and Find Full Text PDFMYO7A is required for the functional integrity of the mechanoelectrical transduction complex in hair cells of the adult cochlea.
Proc Natl Acad Sci U S A
January 2025
School of Biosciences, University of Sheffield, Sheffield S10 2TN, United Kingdom.
Myosin-VIIA (MYO7A) is an unconventional myosin responsible for syndromic (Usher 1B) or nonsyndromic forms of deafness in humans when mutated. In the cochlea, MYO7A is expressed in hair cells, where it is believed to act as the motor protein tensioning the mechanoelectrical transducer (MET) channels, thus setting their resting open probability (). However, direct evidence for this unique role for an unconventional myosin in mature hair cells is lacking.
View Article and Find Full Text PDFCaBP1 and 2 enable sustained Ca1.3 calcium currents and synaptic transmission in inner hair cells.
Elife
December 2024
Experimental Otology Group, InnerEarLab, Department of Otolaryngology, University Medical Center Göttingen, Göttingen, Germany.
To encode continuous sound stimuli, the inner hair cell (IHC) ribbon synapses utilize calcium-binding proteins (CaBPs), which reduce the inactivation of their Ca1.3 calcium channels. Mutations in the gene underlie non-syndromic autosomal recessive hearing loss DFNB93.
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