AIMS: This study set out to establish a novel procedure for the measurement of human nerve growth factor (NGF) messenger ribonucleic acid (mRNA) and to use this method to measure NGF expression in skin biopsies from control subjects and from patients with early neuropathies. NGF mRNA levels were related to functional measures of the competence of NGF-responsive nerves. METHODS: mRNA levels were measured by competitive reverse transcription with polymerase chain reaction amplification (cRT-PCR). Functional correlates of this observation were assessed by indices of thermal sensitivity--mediated by C-fibres, whose phenotype is regulated by NGF. RESULTS: NGF mRNA was increased in skin biopsies from 19 diabetic patients (5.12+/-3.88 (SD)) compared with samples from eight controls (1.57+/-0.95; P=0.001). Diabetic patients showed significantly (P < 0.001) diminished detection of cool and warm stimuli compared to age matched control group (n=24), but there were no differences in detection of heat as pain, or correlation with NGF mRNA levels. CONCLUSIONS: These findings suggest abnormally increased expression of NGF in diabetic neuropathy, which may represent a compensatory mechanism for impaired phenotype in NGF-responsive neurones.
AIMS: This study set out to establish a novel procedure for the measurement of humannerve growth factor (NGF) messenger ribonucleic acid (mRNA) and to use this method to measure NGF expression in skin biopsies from control subjects and from patients with early neuropathies. NGF mRNA levels were related to functional measures of the competence of NGF-responsive nerves. METHODS: mRNA levels were measured by competitive reverse transcription with polymerase chain reaction amplification (cRT-PCR). Functional correlates of this observation were assessed by indices of thermal sensitivity--mediated by C-fibres, whose phenotype is regulated by NGF. RESULTS:NGF mRNA was increased in skin biopsies from 19 diabeticpatients (5.12+/-3.88 (SD)) compared with samples from eight controls (1.57+/-0.95; P=0.001). Diabeticpatients showed significantly (P < 0.001) diminished detection of cool and warm stimuli compared to age matched control group (n=24), but there were no differences in detection of heat as pain, or correlation with NGF mRNA levels. CONCLUSIONS: These findings suggest abnormally increased expression of NGF in diabetic neuropathy, which may represent a compensatory mechanism for impaired phenotype in NGF-responsive neurones.
Authors: Hsinlin T Cheng; Jacqueline R Dauch; John M Hayes; Brandon M Yanik; Eva L Feldman Journal: Neurobiol Dis Date: 2011-08-18 Impact factor: 5.996
Authors: Will Whitmire; Mohammed Mh Al-Gayyar; Mohammed Abdelsaid; Bilal K Yousufzai; Azza B El-Remessy Journal: Mol Vis Date: 2011-01-28 Impact factor: 2.367
Authors: Georgios Baskozos; Oliver Sandy-Hindmarch; Alex J Clark; Katherine Windsor; Pall Karlsson; Greg A Weir; Lucy A McDermott; Joanna Burchall; Akira Wiberg; Dominic Furniss; David L H Bennett; Annina B Schmid Journal: Brain Date: 2020-07-01 Impact factor: 13.501