Myelin is an essential structure that facilitates rapid saltatory conduction in the nervous system. Discrepancies in myelin microstructure are a hallmark of numerous neurological disorders, rendering the assessment of myelin integrity and content an indispensable tool in clinical diagnostics and neuroscience research. Extensive research has been dedicated to scrutinizing its biochemical makeup and morphology under normal, pathological, and experimental conditions over the years. In this review, we present an updated summary of the myelin sheath's structure, composition, and developmental trajectory. We systematically enumerate and contrast eight prevalent myelin staining techniques across dimensions of sensitivity, specificity, and resolution, delving into their underlying staining principles. With an initial application of myelin histology on the mouse demyelination model, our review accentuates the accurate delineation of myelination and the microstructural analysis of the myelin sheath. Such insights are anticipated to significantly contribute to the evaluation and understanding of white matter pathologies.
Myelin Sheath/metabolism* ; Animals ; Humans ; Demyelinating Diseases/pathology* ; Staining and Labeling/methods*

Stem cells play a crucial role in maintaining tissue regenerative capacity and homeostasis. However, mechanisms associated with stem cell senescence require further investigation. In this study, we conducted a proteomic analysis of human dental pulp stem cells (HDPSCs) obtained from individuals of various ages. Our findings showed that the expression of NUP62 was decreased in aged HDPSCs. We discovered that NUP62 alleviated senescence-associated phenotypes and enhanced differentiation potential both in vitro and in vivo. Conversely, the knocking down of NUP62 expression aggravated the senescence-associated phenotypes and impaired the proliferation and migration capacity of HDPSCs. Through RNA-sequence and decoding the epigenomic landscapes remodeled induced by NUP62 overexpression, we found that NUP62 helps alleviate senescence in HDPSCs by enhancing the nuclear transport of the transcription factor E2F1. This, in turn, stimulates the transcription of the epigenetic enzyme NSD2. Finally, the overexpression of NUP62 influences the H3K36me2 and H3K36me3 modifications of anti-aging genes (HMGA1, HMGA2, and SIRT6). Our results demonstrated that NUP62 regulates the fate of HDPSCs via NSD2-dependent epigenetic reprogramming.
Humans ; Dental Pulp/cytology* ; Nuclear Pore Complex Proteins/genetics* ; Cellular Senescence/genetics* ; Stem Cells/metabolism* ; Epigenesis, Genetic ; Cell Proliferation ; Cell Differentiation ; Histone-Lysine N-Methyltransferase/metabolism* ; Cells, Cultured ; Cellular Reprogramming ; Cell Movement ; Proteomics

Purpose To investigate the consistency of the"Standards and guidelines for the interpretation and reporting of sequence variants in cancer"published in 2017 by the Associa-tion for Molecular Pathology(AMP)/American Society of Clini-cal Oncology(ASCO)/College of American Pathologists(CAP).Methods Sixty variants of 26 genes from 11 types of cancer were selected.5 professionals from four hospitals e-quipped with in-hospital NGS detection ability were used to in-terpret the treatment,diagnosis and progenosis respectivly.In the first phase of the study,each researcher rated the variants individually according to their own understanding of the 2017 guideline.In the second phase,the details of the guidelines'e-valuation principles were discussed and interpreted again after reaching a consensus.Results Eleven principles recognized by all participants were summarized as a supplement to interpreta-tion.Fleiss consistency showed that the consistency of interpre-tation of treatment and prognostic significance in the second stage was higher than that in the first phase(κ value was 0.166 vs 0.276,0.014 vs 0.185).The consistency of interpretation of diagnostic significance in the second stage was lower than that in the first phase(κ value was 0.454 vs 0.035).Conclusion There is inconsistency in the clinical interpretation of tumor gene variation among different laboratories.It is feasible for laborato-ries to establish a mutually recognized interpretation system for the clinical diagnosis,treatment,and prognosis of tumors.

Oral diseases,such as periodontitis,salivary gland diseases,and oral cancers,significantly challenge health conditions due to their detrimental effects on patient's digestive functions,pronunciation,and esthetic demands.Delayed diagnosis and non-targeted treatment profoundly influence patients'prognosis and quality of life.The exploration of innovative approaches for early detection and precise treatment represents a promising frontier in oral medicine.Exosomes,which are characterized as nanometer-sized extracellular vesicles,are secreted by virtually all types of cells.As the research continues,the complex roles of these intracellular-derived extracellular vesicles in biological processes have gradually unfolded.Exosomes have attracted attention as valuable diagnostic and therapeutic tools for their ability to transfer abundant biological cargos and their intricate involvement in multiple cellular functions.In this review,we provide an overview of the recent applications of exosomes within the field of oral diseases,focusing on inflammation-related bone diseases and oral squamous cell carcinomas.We characterize the exosome alterations and demonstrate their potential applications as biomarkers for early diagnosis,highlighting their roles as indicators in multiple oral diseases.We also summarize the promising applications of exosomes in targeted therapy and proposed future directions for the use of exosomes in clinical treatment.

Oral diseases,such as periodontitis,salivary gland diseases,and oral cancers,significantly challenge health conditions due to their detrimental effects on patient's digestive functions,pronunciation,and esthetic demands.Delayed diagnosis and non-targeted treatment profoundly influence patients'prognosis and quality of life.The exploration of innovative approaches for early detection and precise treatment represents a promising frontier in oral medicine.Exosomes,which are characterized as nanometer-sized extracellular vesicles,are secreted by virtually all types of cells.As the research continues,the complex roles of these intracellular-derived extracellular vesicles in biological processes have gradually unfolded.Exosomes have attracted attention as valuable diagnostic and therapeutic tools for their ability to transfer abundant biological cargos and their intricate involvement in multiple cellular functions.In this review,we provide an overview of the recent applications of exosomes within the field of oral diseases,focusing on inflammation-related bone diseases and oral squamous cell carcinomas.We characterize the exosome alterations and demonstrate their potential applications as biomarkers for early diagnosis,highlighting their roles as indicators in multiple oral diseases.We also summarize the promising applications of exosomes in targeted therapy and proposed future directions for the use of exosomes in clinical treatment.

BACKGROUND:Clinical studies have found good analgesic effects of silver needle-thermal conduction therapy in patients with myofascial pain syndrome,but the exact mechanism remains unclear. OBJECTIVE:To observe the effect of silver needle-thermal conduction therapy on silent information regulator homolog 3(SIRT3)changes and mitochondrial ultrastructure in a rat model of myofascial pain syndrome. METHODS:Twenty rats were randomly selected from 26 Sprague-Dawley rats and were subjected to percussion combined with motor fatigue for replicating the rat model of myofascial pain syndrome.Sixteen rats that were successfully modeled were randomly divided into model group and silver needle-thermal conduction therapy group(treatment group),with eight rats in each group.The remaining rats were used as controls(normal group).The treatment group was treated with silver needle-thermal conduction therapy.Mechanical withdrawal threshold and thermal withdrawal latency of rats were measured at 1 day before modeling,1 day after modeling and 14 days after treatment.Electromyographic activities of the right medial femoral muscle were measured at 14 days after treatment.The right medial femoral muscle tissue was taken for hematoxylin-eosin staining to observe the local morphology and for transmission electron microscopy to observe the mitochondrial ultrastructure.Western blot assay was performed to detect SIRT3 expression. RESULTS AND CONCLUSION:Pain threshold:The mechanical withdrawal threshold and thermal withdrawal latency of the model and treatment groups were significantly decreased compared with those in the normal group and before modeling(P＜0.01).After treatment,the mechanical withdrawal threshold and thermal withdrawal latency of rats were significantly higher in the treatment group compared with the model group(P＜0.01).Electromyography:The rats in the model group showed spontaneous electrical activity in the right medial femur,while the rats in the treatment group showed reduced spontaneous electrical activity,longer time frame(P＜0.01)and lower wave amplitude(P＜0.05)compared with the model group.Hematoxylin-eosin staining:In the normal group,rat muscle fibers arranged closely and regularly.In the model group,the muscle fibers of rats were atrophied,degenerated,and disordered in arrangement.In the treatment group,rat muscle structure disorder improved.Mitochondrial microstructure:Under the transmission electron microscope,mitochondrial structure in the normal group was normal;mitochondrial swelling with broken or disappeared cristae appeared in the model group;mitochondrial swelling in the treatment group was obviously relieved or tended to be normal.SIRT3 expression:SIRT3 expression was significantly downregulated in the model group compared with the normal group,but was significantly upregulated in the treatment group compared with the model group(P＜0.05).To conclude,abnormalities in local muscle mitochondria and downregulation of SIRT3 expression suggest the presence of impaired energy metabolism in the rat model of myofascial pain syndrome.Mitochondrial changes recover and are close to normal after the silver needle-thermal conduction therapy,and the expression of SIRT3 is also upregulated close to the normal group,indicating the silver needle-thermal conduction therapy may play a therapeutic role by promoting mitochondrial repair and improving energy metabolism disorder.

Background Arsenic, cobalt, barium, and other individual metal exposure have been confirmed to be associated with the incidence of kidney stones. However, there are few studies on the association between mixed metal exposure and kidney stones, especially in occupational groups. Objective To investigate the association between mixed metal exposure and kidney stones in an occupational population from a metal smelting plant. Methods A questionnaire survey was conducted to collect sociodemographic characteristics, medical history, and lifestyle information of 1158 mixed metal-exposed workers in a metal smelting plant in Guangdong Province from July 2021 to January 2022. Midstream morning urine samples were collected from the workers, the concentrations of 18 metals including lithium, vanadium, chromium, manganese, cobalt, nickel, copper, zinc, arsenic, selenium, strontium, molybdenum, cadmium, cesium, barium, tungsten, titanium, and lead were measured by inductively coupled plasma mass spectrometry, and the urinary mercury levels were measured by cold atomic absorption spectroscopy. Based on predetermined inclusion criteria, a total of 919 mixed metal-exposed workers were included in the study, including 117 workers in the kidney stone group and 802 workers in the non-kidney stone group. With a detection rate of urinary metals greater than 80% as entry criterion, 16 eligible metals were finally included for further analysis. Parametric or non-parametric methods were used to compare the differences between continuous or categorical variables of the non-kidney stone group and the kidney stone group. Logistic regression models were constructed to explore the association between individual metal exposures and kidney stones. Weighted quantile sum (WQS) regression models were used to evaluate the association between mixed metal exposure and kidney stones, as well as the weights of each metal on kidney stones. Then Bayesian kernel machine regression (BKMR) models were used to explore the overall effect of mixed metal exposure on renal calculi and the potential interactions between metals. Results We found that there were significant differences in sex, age, length of service, and body mass Index (BMI) between the non-kidney stone group and the kidney stone group (P<0.05). The urinary concentrations of molybdenum and barium in the kidney stone group were higher than those in the non-kidney stone group, and the differences were statistically significant (P<0.05). The logistic regression models demonstrated that urinary cobalt, arsenic, molybdenum, and barium were positively correlated with the risk of kidney stones (P_trend<0.05). The WQS regression models showed that the mixed exposure to vanadium, cobalt, arsenic, molybdenum, and barium was positively associated with the risk of kidney stones (P<0.05). Among them, molybdenum, arsenic, and barium accounted for 0.391, 0.337, and 0.154, respectively. The BKMR results revealed a positive association between metal mixture exposure and the risk of kidney stones (P<0.05). When other metals were fixed at the 25th, 50th, or 75th percentile, arsenic, molybdenum, cobalt, and barium exhibited significant positive effects on the risk of kidney stones (P<0.05), while vanadium showed a significant negative effect (P<0.05). The interaction analysis demonstrated interactions between barium and cobalt, as well as between vanadium and cobalt (P<0.05). Conclusion In the occupational population of this smelter, occupational mixed metal exposure could increase the risk of kidney stones, and the main metals are molybdenum, arsenic, barium, and cobalt.

Oral diseases,such as periodontitis,salivary gland diseases,and oral cancers,significantly challenge health conditions due to their detrimental effects on patient's digestive functions,pronunciation,and esthetic demands.Delayed diagnosis and non-targeted treatment profoundly influence patients'prognosis and quality of life.The exploration of innovative approaches for early detection and precise treatment represents a promising frontier in oral medicine.Exosomes,which are characterized as nanometer-sized extracellular vesicles,are secreted by virtually all types of cells.As the research continues,the complex roles of these intracellular-derived extracellular vesicles in biological processes have gradually unfolded.Exosomes have attracted attention as valuable diagnostic and therapeutic tools for their ability to transfer abundant biological cargos and their intricate involvement in multiple cellular functions.In this review,we provide an overview of the recent applications of exosomes within the field of oral diseases,focusing on inflammation-related bone diseases and oral squamous cell carcinomas.We characterize the exosome alterations and demonstrate their potential applications as biomarkers for early diagnosis,highlighting their roles as indicators in multiple oral diseases.We also summarize the promising applications of exosomes in targeted therapy and proposed future directions for the use of exosomes in clinical treatment.

Oral diseases,such as periodontitis,salivary gland diseases,and oral cancers,significantly challenge health conditions due to their detrimental effects on patient's digestive functions,pronunciation,and esthetic demands.Delayed diagnosis and non-targeted treatment profoundly influence patients'prognosis and quality of life.The exploration of innovative approaches for early detection and precise treatment represents a promising frontier in oral medicine.Exosomes,which are characterized as nanometer-sized extracellular vesicles,are secreted by virtually all types of cells.As the research continues,the complex roles of these intracellular-derived extracellular vesicles in biological processes have gradually unfolded.Exosomes have attracted attention as valuable diagnostic and therapeutic tools for their ability to transfer abundant biological cargos and their intricate involvement in multiple cellular functions.In this review,we provide an overview of the recent applications of exosomes within the field of oral diseases,focusing on inflammation-related bone diseases and oral squamous cell carcinomas.We characterize the exosome alterations and demonstrate their potential applications as biomarkers for early diagnosis,highlighting their roles as indicators in multiple oral diseases.We also summarize the promising applications of exosomes in targeted therapy and proposed future directions for the use of exosomes in clinical treatment.

Oral diseases,such as periodontitis,salivary gland diseases,and oral cancers,significantly challenge health conditions due to their detrimental effects on patient's digestive functions,pronunciation,and esthetic demands.Delayed diagnosis and non-targeted treatment profoundly influence patients'prognosis and quality of life.The exploration of innovative approaches for early detection and precise treatment represents a promising frontier in oral medicine.Exosomes,which are characterized as nanometer-sized extracellular vesicles,are secreted by virtually all types of cells.As the research continues,the complex roles of these intracellular-derived extracellular vesicles in biological processes have gradually unfolded.Exosomes have attracted attention as valuable diagnostic and therapeutic tools for their ability to transfer abundant biological cargos and their intricate involvement in multiple cellular functions.In this review,we provide an overview of the recent applications of exosomes within the field of oral diseases,focusing on inflammation-related bone diseases and oral squamous cell carcinomas.We characterize the exosome alterations and demonstrate their potential applications as biomarkers for early diagnosis,highlighting their roles as indicators in multiple oral diseases.We also summarize the promising applications of exosomes in targeted therapy and proposed future directions for the use of exosomes in clinical treatment.