Hygroscopicity research has long been a key focus and hot topic in Chinese materia medica（CMM）. Elucidating hygroscopic mechanisms plays a vital role in formulation design， process optimization， and storage condition selection. Hygroscopic models serve as essential tools for characterizing CMM hygroscopic mechanisms， with various types available. The double exponential model is a kinetic mathematical model constructed based on the law of conservation of energy and Fick's first law of diffusion， tailored to the physical properties of CMM extracts. In recent years， this model has been extensively applied to simulate the dynamic moisture absorption behavior of CMM extracts and solid dosage forms under varying humidity conditions. It has revealed the correlation between moisture absorption kinetic parameters and material properties， offering a new perspective for characterizing the moisture uptake behavior of CMM. This paper systematically reviews the application progress of this model in the field of CMM， analyzes its advantages， disadvantages， and challenges in this domain， and explores its potential application trends in other fields. It aims to provide references for elucidating the moisture absorption mechanisms of CMM and researching moisture-proofing technologies， while also offering insights for its broader application in food and polymer materials.

Immobilized enzyme-based enzyme electrode biosensors, characterized by high sensitivity and efficiency, strong specificity, and compact size, demonstrate broad application prospects in life science research, disease diagnosis and monitoring, etc. Immobilization of enzyme is a critical step in determining the performance (stability, sensitivity, and reproducibility) of the biosensors. Random immobilization (physical adsorption, covalent cross-linking, etc.) can easily bring about problems, such as decreased enzyme activity and relatively unstable immobilization. Whereas, directional immobilization utilizing amino acid residue mutation, affinity peptide fusion, or nucleotide-specific binding to restrict the orientation of the enzymes provides new possibilities to solve the problems caused by random immobilization. In this paper, the principles, advantages and disadvantages and the application progress of enzyme electrode biosensors of different directional immobilization strategies for enzyme molecular sensing elements by specific amino acids (lysine, histidine, cysteine, unnatural amino acid) with functional groups introduced based on site-specific mutation, affinity peptides (gold binding peptides, carbon binding peptides, carbohydrate binding domains) fused through genetic engineering, and specific binding between nucleotides and target enzymes (proteins) were reviewed, and the application fields, advantages and limitations of various immobilized enzyme interface characterization techniques were discussed, hoping to provide theoretical and technical guidance for the creation of high-performance enzyme sensing elements and the manufacture of enzyme electrode sensors.

Background: Diabetic macrovascular and microvascular complications often coexist and may share similar risk factors and pathological pathways. We aimed to investigate whether 10-year atherosclerotic cardiovascular disease (ASCVD) risk, which is commonly assessed in diabetes management, can predict incident diabetic nephropathy (DN) and retinopathy (DR) in patients with type 2 diabetes mellitus (T2DM). Methods: This prospective cohort study enrolled 2,891 patients with clinically diagnosed T2DM who were free of ASCVD, nephropathy, or retinopathy at baseline in the Guangzhou (2017–2022) and Shaoguan (2019–2021) Diabetic Eye Study in southern China. The 10-year ASCVD risk was calculated by the Prediction for ASCVD Risk in China (China-PAR) equations. Multivariable- adjusted Cox proportional hazard models were developed to estimate hazard ratios (HRs) with 95% confidence intervals (CIs). The area under the receiver operating characteristic curve (AUC) was used to evaluate predictive capability. Results: During follow-up, a total of 171 cases of DN and 532 cases of DR were documented. Each 1% increment in 10-year ASCVD risk was associated with increased risk of DN (pooled HR, 1.122; 95% CI, 1.094 to 1.150) but not DR (pooled HR, 0.996; 95% CI, 0.979 to 1.013). The model demonstrated acceptable performance in predicting new-onset DN (pooled AUC, 0.670; 95% CI, 0.628 to 0.715). These results were consistent across cohorts and subgroups, with the association appearing to be more pronounced in women. Conclusion Ten-year ASCVD risk predicts incident DN but not DR in our study population with T2DM. Regular monitoring of ASCVD risk in routine diabetes practice may add to the ability to enhance population-based prevention for both macrovascular and microvascular diseases, particularly among women.

The anti-inflammatory phytochemical investigation of the leaves of Illicium dunnianum (I. dunnianum) resulted in the isolation of five pairs of new lignans (1-5), and 7 known analogs (6-12). The separation of enantiomer mixtures 1-5 to 1a/1b-5a/5b was achieved using a chiral column with acetonitrile-water mixtures as eluents. The planar structures of 1-2 were previously undescribed, and the chiral separation and absolute configurations of 3-5 were reported for the first time. Their structures were determined through comprehensive spectroscopic data analysis [nuclear magnetic resonance (NMR), high-resolution electrospray ionization mass (HR-ESI-MS), infrared (IR), and ultraviolet (UV)] and quantum chemistry calculations (ECD). The new isolates were evaluated by measuring their inhibitory effect on NO in lipopolysaccharide (LPS)-stimulated BV-2 cells. Compounds 1a, 3a, 3b, and 5a demonstrated partial inhibition of NO production in a concentration-dependent manner. Western blot and real-time polymerase chain reaction (PCR) assays revealed that 1a down-regulated the messenger ribonucleic acid (mRNA) levels of tumor necrosis factor α (TNF-α), interleukin-6 (IL-6), COX-2, and iNOS and the protein expressions of COX-2 and iNOS. This research provides guidance and evidence for the further development and utilization of I. dunnianum.
Lignans/isolation & purification* ; Plant Leaves/chemistry* ; Anti-Inflammatory Agents/isolation & purification* ; Mice ; Animals ; Molecular Structure ; Plant Extracts/pharmacology* ; Illicium/chemistry* ; Cyclooxygenase 2/immunology* ; Interleukin-6/immunology* ; Nitric Oxide/metabolism* ; Cell Line ; Tumor Necrosis Factor-alpha/immunology* ; Nitric Oxide Synthase Type II/immunology* ; Lipopolysaccharides

OBJECTIVE: The role of cold spells of different intensities in the economic burden of death is crucial for health adaptation to climate change, especially in a multi-site setting. The objective of the study was to explore the economic burden of mortality attributable to cold spells. METHODS: We performed a two-stage time-series analysis using the Value of Statistical Life (VSL) approach to evaluate the economic impact of mortality related to cold spells of varying lengths and intensities. This analysis employed a case-crossover design, with a distributed lag nonlinear model (DLNM) used for analysis. Analysis was stratified according to age, sex, and region of origin. The results of the assessment show that cold spells have an enormous impact on the economic losses of mortality due to climate change and aging. RESULTS: Totally, 8.3% (95% CI: 0.0%, 16.0%) to 13.8% (95% CI: 1.0%, 24.8%) of VSL were ascribed to cold spells, accounting for economic losses of 4.71 (95% CI: 0.34, 8.47) to 11.45 (95% CI: 0.00, 21.00) billion CNY, in the cold season. The population aged over 65 y and females are particularly vulnerable. Economic impacts in warmer regions, such as the southern and subtropical zones, are more extensive than those in the northern and temperate zones. CONCLUSION Customizing cold spell prevention measures for vulnerable populations or regions is vital to alleviating the socioeconomic burden.
China/epidemiology* ; Humans ; Female ; Male ; Cold Temperature/adverse effects* ; Aged ; Middle Aged ; Adult ; Mortality ; Infant ; Child ; Adolescent ; Child, Preschool ; Young Adult ; Climate Change ; Aged, 80 and over ; Cost of Illness ; Infant, Newborn

Adolescents and young adults (AYAs) are one of the major populations susceptible to tuberculosis. However, little is known about the unique characteristics and diagnostic biomarkers of tuberculosis in this population. In this study, 81 AYAs were recruited, and the high-quality serum proteome of the AYAs with tuberculosis was profiled by quantitative proteomics. The data of serum proteomics indicated that the relative abundance of hemoglobin and apolipoprotein was significantly reduced in the patients with active tuberculosis (ATB). The pathway enrichment analysis showed that the downregulated proteins in the ATB group were mainly involved in the antioxidant and cell detoxification pathways, indicating extensive oxidative stress damage. Random forest (RF) and extreme gradient boosting (XGBoost) were employed to evaluate protein importance, which yielded a set of candidate proteins that can distinguish between ATB and non-ATB. The analysis with the support vector machine algorithm (recursive feature elimination) suggested that the combination of apolipoprotein A-I (APOA1), hemoglobin subunit beta (HBB), and hemoglobin subunit alpha-1 (HBA1) had the highest accuracy and sensitivity in diagnosing ATB. Meanwhile, the levels of hemoglobin (HGB) and albumin (ALB) can be used as blood biochemical indicators to evaluate changes in the protein levels of APOA1 and HBB. This study established the serum proteome landscape of AYAs with tuberculosis and identified new biomarkers for the diagnosis of tuberculosis in this population.
Humans ; Proteomics/methods* ; Biomarkers/blood* ; Adolescent ; Young Adult ; Apolipoprotein A-I/blood* ; Machine Learning ; Tuberculosis/blood* ; Proteome/analysis* ; Male ; Hemoglobins/analysis* ; Female ; Blood Proteins/analysis* ; Adult

Background: Diabetic macrovascular and microvascular complications often coexist and may share similar risk factors and pathological pathways. We aimed to investigate whether 10-year atherosclerotic cardiovascular disease (ASCVD) risk, which is commonly assessed in diabetes management, can predict incident diabetic nephropathy (DN) and retinopathy (DR) in patients with type 2 diabetes mellitus (T2DM). Methods: This prospective cohort study enrolled 2,891 patients with clinically diagnosed T2DM who were free of ASCVD, nephropathy, or retinopathy at baseline in the Guangzhou (2017–2022) and Shaoguan (2019–2021) Diabetic Eye Study in southern China. The 10-year ASCVD risk was calculated by the Prediction for ASCVD Risk in China (China-PAR) equations. Multivariable- adjusted Cox proportional hazard models were developed to estimate hazard ratios (HRs) with 95% confidence intervals (CIs). The area under the receiver operating characteristic curve (AUC) was used to evaluate predictive capability. Results: During follow-up, a total of 171 cases of DN and 532 cases of DR were documented. Each 1% increment in 10-year ASCVD risk was associated with increased risk of DN (pooled HR, 1.122; 95% CI, 1.094 to 1.150) but not DR (pooled HR, 0.996; 95% CI, 0.979 to 1.013). The model demonstrated acceptable performance in predicting new-onset DN (pooled AUC, 0.670; 95% CI, 0.628 to 0.715). These results were consistent across cohorts and subgroups, with the association appearing to be more pronounced in women. Conclusion Ten-year ASCVD risk predicts incident DN but not DR in our study population with T2DM. Regular monitoring of ASCVD risk in routine diabetes practice may add to the ability to enhance population-based prevention for both macrovascular and microvascular diseases, particularly among women.

Background: Diabetic macrovascular and microvascular complications often coexist and may share similar risk factors and pathological pathways. We aimed to investigate whether 10-year atherosclerotic cardiovascular disease (ASCVD) risk, which is commonly assessed in diabetes management, can predict incident diabetic nephropathy (DN) and retinopathy (DR) in patients with type 2 diabetes mellitus (T2DM). Methods: This prospective cohort study enrolled 2,891 patients with clinically diagnosed T2DM who were free of ASCVD, nephropathy, or retinopathy at baseline in the Guangzhou (2017–2022) and Shaoguan (2019–2021) Diabetic Eye Study in southern China. The 10-year ASCVD risk was calculated by the Prediction for ASCVD Risk in China (China-PAR) equations. Multivariable- adjusted Cox proportional hazard models were developed to estimate hazard ratios (HRs) with 95% confidence intervals (CIs). The area under the receiver operating characteristic curve (AUC) was used to evaluate predictive capability. Results: During follow-up, a total of 171 cases of DN and 532 cases of DR were documented. Each 1% increment in 10-year ASCVD risk was associated with increased risk of DN (pooled HR, 1.122; 95% CI, 1.094 to 1.150) but not DR (pooled HR, 0.996; 95% CI, 0.979 to 1.013). The model demonstrated acceptable performance in predicting new-onset DN (pooled AUC, 0.670; 95% CI, 0.628 to 0.715). These results were consistent across cohorts and subgroups, with the association appearing to be more pronounced in women. Conclusion Ten-year ASCVD risk predicts incident DN but not DR in our study population with T2DM. Regular monitoring of ASCVD risk in routine diabetes practice may add to the ability to enhance population-based prevention for both macrovascular and microvascular diseases, particularly among women.

Objective:To investigate the mechanism of mitochondrial DNA (mtDNA)-reactive oxygen species (ROS)-dynamin-related protein 1 (Drp1) axis in regulating phenotypic transformation of vascular smooth muscle cells (VSMCs).Methods:(1) VSMCs were divided into a control group, a synthetic VSMCs group, and a Drp1 siRNA+synthetic VSMCs group; cells in the Drp1 siRNA+synthetic VSMCs group were transfected with 50 nmol/L Drp1 siRNA for 48 h; cells in the latter two groups were treated with 20 ng/mL platelet-derived growth factor (PDGF)-BB, while cells in the control group were treated with an equal volume of solvent. After another 24 h of culture, Drp1 expression in VSMCs, and mitochondrial Drp1 and mitofusin 2 (Mfn2) expressions were detected by Western blotting, and changes in mitochondrial morphology were detected by mitochondrial fluorescent staining. (2) VSMCs were divided into a control group, a synthetic VSMCs group, and a mitochondrial fission inhibitor 1 (Mdivi-1)+synthetic VSMCs group; cells in the Mdivi-1+synthetic VSMCs group were pretreated with 50 μmol/L Mdivi-1 for 2 h; and cells in the latter two groups were treated with 20 ng/mL PDGF-BB, while cells in the control group were treated with an equal volume of solvent. After 24 hours of continued culture, expressions of α-smooth muscle actin (α-SMA), smooth muscle protein 22-α (SM22-α), proliferating cell nuclear antigen (PCNA), and Cyclin D1 were detected by Western blotting; invasion and migration abilities of VSMCs were detected by Transwell assay and scratch wound healing assay, respectively. (3) VSMCs were divided into a control group, a synthetic VSMCs group, and a N-acetylcysteine (NAC)+synthetic VSMCs group; cells in the NAC+synthetic VSMCs group were pretreated with 5 mmol/L NAC for 1 h; cells in the latter two groups were treated with 20 ng/mL PDGF-BB, while cells in the control group were treated with an equal volume of solvent. After 24 h of continued culture, expressions of Drp1, phosphorylated (p)-Drp1, α-SMA, SM22-α, PCNA, and Cyclin D1 were detected by Western blotting; changes in mitochondrial morphology were detected by mitochondrial fluorescent staining; intracellular ROS level was detected by 2', 7' -dichlorodihydrofluorescein diacetate (DCFH-DA) fluorescent probe; cell invasion and migration abilities were detected by Transwell assay and scratch wound healing assay, respectively. (4) VSMCs were divided into a control group, a synthetic VSMCs group, and a 5-Aza-2'-deoxycytidine (5-Aza-dC)+synthetic VSMCs group; cells in the 5-Aza-dC+synthetic VSMCs group were pretreated with 2 μmol/L 5-Aza-dC for 1 h; and then, cells in the latter two groups were treated with 20 ng/mL PDGF-BB, while cells in the control group were treated with an equal volume of solvent. After 24 h of continued culture, agarose gel electrophoresis was used to analyze the methylation degree in the mitochondrial D-loop region; intracellular ROS level was detected using DCFH-DA fluorescent probe; expressions of mitochondrial DNMT1, α-SMA, SM22-α, PCNA, and Cyclin D1 were detected by Western blotting; invasion and migration abilities were detected by Transwell assay and scratch wound healing assay, respectively.Results:(1) Compared with the control group and synthetic VSMCs group, the Drp1 siRNA+synthetic VSMCs group had significantly decreased Drp1 protein expression ( P<0.05). Compared with the control group, the synthetic VSMCs group had significantly increased Drp1 protein expression and decreased Mfn2 protein expression in the mitochondria ( P<0.05); compared with the synthetic VSMCs group, the Drp1 siRNA+synthetic VSMCs group had statistically decreased Drp1 protein expression and increased Mfn2 protein expression in the mitochondria ( P<0.05). Results of mitochondrial fluorescent staining showed that mitochondria in the control group were with filamentous structure, while mitochondrial fission in the synthetic VSMCs group was enhanced, and morphology of mitochondria in the Drp1 siRNA+synthetic VSMCs group tended to be continuous and complete. (2) Compared with the control group, the synthetic VSMCs group had statistically decreased α-SMA and SM22-α protein expressions and increased PCNA and Cyclin D1 protein expressions ( P<0.05). Compared with the synthetic VSMCs group, the Mdivi-1+synthetic VSMCs group had significantly increased α-SMA and SM22-α protein expressions and decreased PCNA and Cyclin D1 protein expressions ( P<0.05). Results of Transwell and scratch wound healing assays showed that compared with the control group, the synthetic VSMCs group had larger number of migrating cells and faster cell scratch healing; compared with the synthetic VSMCs group, the Mdivi-1+synthetic VSMCs group had smaller number of migrating cells and slower cell scratch healing. (3) Compared with the control group (1.10±0.02), the synthetic VSMCs group (1.53±0.02) had significantly increased p-Drp1 protein expression ( P<0.05). Compared with the synthetic VSMCs group, the NAC+synthetic VSMCs group (0.90±0.02) had statistically decreased p-Drp1 protein expression ( P<0.05). Results of mitochondrial fluorescent staining showed that mitochondria in cells of the control group were in a filamentous structure, while mitochondrial fission in cells of the synthetic VSMCs group was enhanced, and morphology of mitochondria in the NAC+synthetic VSMCs group tended to be continuous and complete. Results of DCFH-DA fluorescent probe showed that ROS level in the synthetic VSMCs group was higher than that in the control group, and ROS level in the NAC+synthetic VSMCs group was lower than that in the synthetic VSMCs group. Compared with the control group, the synthetic VSMCs group had significantly decreased α-SMA and SM22-α protein expressions and increased PCNA and Cyclin D1 protein expressions ( P<0.05). Compared with the synthetic VSMCs group, the NAC+synthetic VSMCs group had significantly increased α-SMA and SM22-α protein expressions and decreased PCNA and Cyclin D1 protein expressions ( P<0.05). Results of Transwell and scratch wound healing assays showed that compared with the control group, the synthetic VSMCs group had larger number of migrating cells and faster cell scratch healing; compared with the synthetic VSMCs group, the NAC+synthetic VSMCs group had smaller number of migrating cells and slower cell scratch healing. (4) Results of agarose gel electrophoresis showed that compared with the control group, the synthetic VSMCs group had significantly increased methylation rate in the mitochondrial D-loop region ( P<0.05); compared with the synthetic VSMCs group, the 5-Aza-dC+synthetic VSMCs group had statistically decreased methylation rate in the mitochondrial D-loop region ( P<0.05). Compared with the control group, the synthetic VSMCs group had statistically increased mitochondrial DNMT1 protein expression (1.03±0.03 vs. 0.55±0.03, P<0.05); and compared with the synthetic VSMCs group, the the 5-Aza-dC+synthetic VSMCs group (0.62±0.03) had significantly decreased mitochondrial DNMT1 protein expression ( P<0.05). Results of DCFH-DA fluorescent probe showed that ROS level in the synthetic VSMCs group was higher than that in the control group; ROS level in the 5-Aza-dC+synthetic VSMCs group was lower than that in the synthetic VSMCs group. Compared with the control group, the synthetic VSMCs group had significantly decreased α-SMA and SM22-α protein expressions and increased PCNA and Cyclin D1 protein expressions ( P<0.05). Compared with the synthetic VSMCs group, the 5-Aza-dC+synthetic VSMCs group had significantly increased α-SMA and SM22-α protein expressions and decreased PCNA and Cyclin D1 protein expressions ( P<0.05). Results of Transwell and scratch wound healing assays showed that compared with the control group, the synthetic VSMCs group had larger number of migrating cells and faster scratch healing. Compared with the synthetic VSMCs group, the 5-Aza-dC+synthetic VSMCs group had smaller number of migrating cells and slower scratch healing. Conclusion:The mtDNA-ROS-Drp1 axis may regulate the phenotypic transformation of VSMCs by modulating mitochondrial epigenetic modifications.

Objective To investigate the effects of Nel-like type 1 molecule(NELL-1)on the proliferation and osteogenic differenti-ation of stem cells from human exfoliated deciduous teeth(SHEDs).Methods SHEDs was isolated,cultured,and identified.The third generation SHEDs were used for subsequent experiments.SHEDs were divided into 4 groups,and NELL-1 was added to each group at concentrations of 0(control group),50,100,and 200 ng/mL.Cell activity was measured by CCK-8 assay and crystal violet staining.The changes in osteogenic ability were detected by alkaline phosphatase activity.The expression levels of osteogenesis-related genes ALP,OCN and Runx-2 by RT-qPCR were detected.Western blot was used to detect the expression of osteogenesis-related pro-teins ALP,Runx-2 and Col-Ⅰ.Results SHEDs exhibited stem cell characteristics,and 50 ng/mL of NELL-1 protein had a promo-ting effect on SHEDs proliferation(P＜0.01).Alkaline phosphatase activity assay showed that after the addition of NELL-1,the osteo-genic effect of each group was better than that of the control group and 50 ng/mL of NELL-1 was the best(P＜0.05).RT-qPCR and Western blot results showed that 50 ng/mL of NELL-1 significantly promoted the expression of osteoblast-related genes including ALP,OCN and Runx-2 and the protein expression of ALP,Runx-2 and Col-Ⅰ(P＜0.05).Conclusion NELL-1 can promote the prolifera-tion and osteogenic differentiation of SHEDs.