Gene/Protein Disease Symptom Drug Enzyme Compound
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The results of chronic, in vivo delivery of excitatory and inhibitory neurotransmitter substances upon the craniofacial skeleton are of ongoing interest to clinician and basic scientist alike. Our purpose was to document and compare the effects of biodegradable glycine, glutamate, and thyrotropin-releasing hormone (TRH) microspheres upon the craniofacial skeleton and TMJ of actively growing rats. Glycine, glutamate, TRH, and blank microspheres were stereotactically implanted in proximity to motoneurons within the trigeminal motor nucleus in order to test the following null hypotheses: (1) neurotransmitter microspheres implanted near trigeminal motoneurons of growing rats have no significant effect on the craniofacial skeleton and temporomandibular joints of implanted animals, and (2) there are no significant differences between the relative effects of glutamate, TRH (excitatory to trigeminal motoneurons), and glycine (inhibitory to trigeminal motoneurons) implants upon the craniofacial skeleton and temporomandibular joint. Fifty male Sprague-Dawley rats underwent stereotactic neurosurgery at 35 days; five rats each were killed at 14 and 21 days postoperative for data collection and comparison between glycine-, glutamate-, TRH-, blank-microsphere, and sham-surgery rats. Glycine rats had significantly (P < or = 0.05, 0. 01) smaller implant-side cranial dimensions and mandibular condyles, all glycine rats showed increased gracility of implant-side bones, and deviation of their facial skeleton away from the implant-side; this was in contrast to the generally larger implant-side bony structures in both glutamate and TRH rats. The two null hypotheses were both rejected. Due to their inhibitory and excitatory effects upon trigeminal motoneurons, masticatory muscles, and their neuromuscular generation of biomechanical forces that affect bone, the neurotransmitter substances glycine, glutamate, and TRH appear to play an important role in the growth and development of the mammalian craniofacial skeleton and TMJ.
Anat Rec 2000 04 01
PMID:Increased in vivo levels of neurotransmitters to trigeminal motoneurons: effects on craniofacial bone and TMJ. 1073 55

Yin-deficiency-heat (YDH) syndrome is a common sub-health state of the human body in traditional Chinese medicine (TCM). However, due to the lack of objective quantitative diagnostic indicators, patients with early-stage YDH syndrome cannot be treated in time and can develop a pathological (disease) state. Therefore, it is necessary to apply modern diagnostic techniques in order to identify the biological markers for the diagnosis of early-stage YDH syndrome. In the present study, we performed Solexa sequencing and non-targeted metabolomics analysis using high-performance liquid chromatography coupled with mass spectrometry to screen differentially expressed mRNAs and differential metabolites in individuals with early-stage YDH syndrome and healthy controls. Bioinformatics methods were used to perform enrichment analysis of differentially expressed mRNAs and differential metabolites for biological functions and signaling pathways. Furthermore, we found that differentially expressed mRNAs and differential metabolites were related to energy metabolism. Real-time PCR was used to validate the mRNA expression in the serum of subjects with early-stage YDH syndrome. We found that the mitochondrially encoded NADH dehydrogenase 2 (MT-ND2) mRNA was differentially expressed in the serum of individuals with early-stage YDH syndrome. Receiver operating characteristic (ROC) curve and logistic regression analysis were used to evaluate the efficacy of the diagnostic model based on eight differential metabolites. We combined the three metabolites such as Glycine, Sphingomyelin, and Isocitrate to establish the diagnostic model with a sensitivity of 0.853 and a specificity of 0.800. The combination of the above three metabolites may serve as a potential biomarker for the diagnosis of early-stage YDH syndrome. Our study reveals potential biomarker for the diagnosis of early-stage YDH syndrome and also provides a new method for the quantification and objectification of TCM syndromes.
Anat Rec (Hoboken) 2020 08
PMID:Study on potential biomarkers of energy metabolism-related to early-stage Yin-deficiency-heat syndrome based on metabolomics and transcriptomics. 3190 98