scholarly journals PRDM12 Is Transcriptionally Active and Required for Nociceptor Function Throughout Life

2021 ◽  
Vol 14 ◽  
Author(s):  
Tomislav Kokotović ◽  
Michiel Langeslag ◽  
Ewelina M. Lenartowicz ◽  
John Manion ◽  
Christopher W. Fell ◽  
...  
Keyword(s):  
Mouse Models ◽  
Mammalian Development ◽  
Peripheral Neurons ◽  
Congenital Insensitivity ◽  
Nociceptive Responses ◽  
Congenital Insensitivity To Pain ◽  
Temporal And Spatial ◽  
Sensory Neurogenesis ◽  
Pr Domain ◽  
Insensitivity To Pain

PR domain-containing member 12 (PRDM12) is a key developmental transcription factor in sensory neuronal specification and survival. Patients with rare deleterious variants in PRDM12 are born with congenital insensitivity to pain (CIP) due to the complete absence of a subtype of peripheral neurons that detect pain. In this paper, we report two additional CIP cases with a novel homozygous PRDM12 variant. To elucidate the function of PRDM12 during mammalian development and adulthood, we generated temporal and spatial conditional mouse models. We find that PRDM12 is expressed throughout the adult nervous system. We observed that loss of PRDM12 during mid-sensory neurogenesis but not in the adult leads to reduced survival. Comparing cellular biophysical nociceptive properties in developmental and adult-onset PRDM12 deletion mouse models, we find that PRDM12 is necessary for proper nociceptive responses throughout life. However, we find that PRDM12 regulates distinct age-dependent transcriptional programs. Together, our results implicate PRDM12 as a viable therapeutic target for specific pain therapies even in adults.

scholarly journals Loss of Prdm12 during development, but not in mature nociceptors, causes defects in pain sensation

2020 ◽  
Author(s):  
Mark A. Landy ◽  
Megan Goyal ◽  
Katherine M. Casey ◽  
Chen Liu ◽  
Helen C. Lai
Keyword(s):  
Transcription Factor ◽  
Dorsal Root ◽  
Knockout Mouse ◽  
Developmental Time ◽  
Conditional Knockout ◽  
Pain Sensation ◽  
Congenital Insensitivity ◽  
Congenital Insensitivity To Pain ◽  
Sensory Neurogenesis ◽  
Insensitivity To Pain

SummaryPrdm12 is as a key transcription factor in nociceptor neurogenesis. Mutations of Prdm12 cause Congenital Insensitivity to Pain (CIP) due to failure of nociceptor development. However, precisely how deletion of Prdm12 during development or adulthood affects nociception is unknown. Here, we employ tissue- and temporal-specific knockout mouse models to test the function of Prdm12 during development and in adulthood. We find that constitutive loss of Prdm12 causes deficiencies in proliferation during sensory neurogenesis. We also demonstrate that conditional knockout from dorsal root ganglia (DRGs) during embryogenesis causes defects in nociception. In contrast, we find that in adult DRGs, Prdm12 is dispensable for pain sensation and injury-induced hypersensitivity. Using transcriptomic analysis, we found unique changes in adult Prdm12 knockout DRGs compared to embryonic knockout, and that PRDM12 is likely a transcriptional activator in the adult. Overall, we find that the function of PRDM12 changes over developmental time.

scholarly journals Guided growth in the correction of knee deformity in patients with congenital insensitivity to pain

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Soroush Baghdadi ◽  
Sadegh Saberi ◽  
Taghi Baghdadi
Keyword(s):  
Demographic Data ◽  
Joint Destruction ◽  
Walking Ability ◽  
Guided Growth ◽  
Tertiary Referral Hospital ◽  
Common Procedure ◽  
Correction Rate ◽  
Congenital Insensitivity ◽  
Congenital Insensitivity To Pain ◽  
Insensitivity To Pain

Abstract Background Orthopedic manifestations of congenital insensitivity to pain (CIP) can be devastating if left untreated. Knee deformities are common in patients with CIP and might lead to joint destruction and loss of walking ability. The purpose of the present study was to report the results and complications of guided growth procedures around the knee in patients with CIP. Methods In a retrospective review, all patients with CIP who underwent guided growth procedures around the knee from 2009 to 2017 at a tertiary referral hospital were evaluated. Patients with secondary insensitivity to pain (e.g., syringomyelia), as well as patients with incomplete records, were excluded. Demographic data, clinical findings, correction rate, and complications were recorded. Results Ten knees in six patients fulfilled the inclusion criteria. The median age was 10 (range, 5–12), with a mean follow-up of 31 months (range, 16–56). Distal femoral tension-band hemiepiphysiodesis was the most common procedure, followed by proximal tibial hemiepiphysiodesis. The mean correction rate was 0.28°/month for femoral deformity. Staples were removed prematurely in one patient due to extrusion. No cases of infection or skin dehiscence were observed. None of the patients needed a reconstructive knee procedure during the study period. Conclusions The findings of this study suggest that guided growth procedures might have a role in the correction of knee deformities in patients with CIP. However, the correction rate is lower than that of typically developing children, patients should be closely followed to prevent complications, and stringent patient selection criteria should be followed to ensure success.

scholarly journals Identification of a novel nonsense mutation of the neurotrophic tyrosine kinase receptor type 1 gene in two siblings with congenital insensitivity to pain with anhidrosis

2017 ◽  
Vol 45 (2) ◽  
pp. 549-555 ◽  
Author(s):  
Ting Wang ◽  
Haibo Li ◽  
Jingjing Xiang ◽  
Bin Wei ◽  
Qin Zhang ◽  
...  
Keyword(s):  
Tyrosine Kinase ◽  
Nonsense Mutation ◽  
Mutation Screening ◽  
Receptor Type ◽  
Tyrosine Kinase Receptor ◽  
Site Mutation ◽  
Congenital Insensitivity ◽  
Congenital Insensitivity To Pain ◽  
Insensitivity To Pain

Objective To explore the aetiology of congenital insensitivity to pain with anhidrosis (CIPA) in two Chinese siblings with typical CIPA symptoms including insensitivity to pain, inability to sweat, and self-mutilating behaviours. Methods Clinical examination and genetic testing were conducted of all available family members, and the findings were used to create a pedigree. Mutation screening using PCR amplification and DNA Sanger sequencing of the entire neurotrophic tyrosine kinase receptor type 1 gene ( NTRK1) including intron–exon boundaries was used to identify mutations associated with CIPA. Results A novel nonsense mutation (c.7C > T, p. Arg3Ter) and a known splice-site mutation (c.851-33 T > A) were detected in NTRK1 and shown to be associated with CIPA. Conclusion Our findings expand the known mutation spectrum of NTRK1 and provide insights into the aetiology of CIPA.

NovelNTRK1mutations associated with congenital insensitivity to pain with anhidrosis verified by functional studies

2017 ◽  
Vol 22 (2) ◽  
pp. 92-99 ◽  
Author(s):  
Tai-Seung Nam ◽  
Wenting Li ◽  
Somy Yoon ◽  
Gwang Hyeon Eom ◽  
Myeong-Kyu Kim ◽  
...  
Keyword(s):  
Functional Studies ◽  
Congenital Insensitivity ◽  
Congenital Insensitivity To Pain ◽  
Insensitivity To Pain

scholarly journals Congenital Insensitivity to Pain with Multiple Fractures: A Case Report and Literature Review

2021 ◽  
Vol 10 (03) ◽  
pp. 1-4
Author(s):  
Pan Zhou ◽  
Chao Liu ◽  
Jinpei Yang ◽  
Shuai Zheng ◽  
Xueshi Li ◽  
...  
Keyword(s):  
Case Report ◽  
Literature Review ◽  
Multiple Fractures ◽  
Congenital Insensitivity ◽  
Congenital Insensitivity To Pain ◽  
Insensitivity To Pain
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