Identification of systemic nitrogen signaling in foxtail millet (Setaria italica) roots based on split-root system and transcriptome analysis.

KEY MESSAGE: The study established split-root system (SRS) in foxtail millet, and identified the molecular regulatory mechanisms and metabolic pathways related to systemic nitrogen signaling based on this system and transcriptome analysis. The growth of crops is primarily constrained by the availability of nitrogen (N), an essential nutrient. Foxtail millet (Setaria italica L.) is a significant orphan crop known for its strong tolerance to barren conditions. Despite this, the signaling pathway of nitrogen in foxtail millet remains largely unexplored. Identifying the candidate genes responsible for nitrogen response in foxtail millet is crucial for enhancing its agricultural productivity. This study utilized the split-root system (SRS) in foxtail millet to uncover genes associated with Systemic Nitrogen Signaling (SNS). Transcriptome analysis of the SRS revealed 2158 differentially expressed genes (DEGs) implicated in SNS, including those involved in cytokinin synthesis, transcription factors, E3 ubiquitin ligase, and ROS metabolism. Silencing of SiIPT5 and SiATL31 genes through RNAi in transgenic plants resulted in reduced SNS response, indicating their role in the nitrogen signaling pathway of foxtail millet. Furthermore, the induction of ROS metabolism-related genes in response to KNO3 of the split-root System (Sp.KNO3) suggests a potential involvement of ROS signaling in the SNS of foxtail millet. Overall, this study sheds light on the molecular regulatory mechanisms and metabolic pathways of foxtail millet in relation to SNS.

Urolithin A ameliorates obesity-induced metabolic cardiomyopathy in mice via mitophagy activation.

Metabolic cardiomyopathy (MC) is characterized by intracellular lipid accumulation and utilizing fatty acids as a foremost energy source, thereby leading to excess oxidative stress and mitochondrial dysfunction. There is no effective therapy available yet. In this study we investigated whether defective mitophagy contributed to MC and whether urolithin A (UA), a naturally occurring microflora-derived metabolite, could protect against MC in experimental obese mice. Mice were fed high fat diet for 20 weeks to establish a diet-induced obese model. We showed that mitochondrial autophagy or mitophagy was significantly downregulated in the heart of experimental obese mice. UA (50 mg·kg-1·d-1, for 4 weeks) markedly activated mitophagy and ameliorated MC in obese mice by gavage. In PA-challenged H9C2 cardiomyocytes, UA (5 µM) significantly increased autophagosomes and decreased autolysosomes. Furthermore, UA administration rescued PINK1/Parkin-dependent mitophagy and relieved mitochondrial defects in the heart of obese mice, which led to improving cardiac diastolic function and ameliorating cardiac remodelling. In PA-challenged primarily isolated cardiomyocytes, both application of mitophagy inhibitor Mdivi-1 (15 µM) and silencing of mitophagy gene Parkin blunted the myocardial protective effect of UA. In summary, our data suggest that restoration of mitophagy with UA ameliorates symptoms of MC, which highlights a therapeutic potential of UA in the treatment of MC.

Role of Sonazoid-based contrast-enhanced ultrasonography in the microwave ablation of primary hyperparathyroidism.

OBJECTIVES: This study aimed to determine the performance of Sonazoid-based contrast-enhanced ultrasound (CEUS) in the microwave ablation (MWA) of primary hyperparathyroidism (pHPT). METHODS: Forty patients with pHPT were enrolled and treated with percutaneous ultrasound (US)-guided MWA assisted by CEUS. All patients underwent immediate CEUS examinations following MWA. On post-ablation day 1, patients who did not display a decrease in intact parathyroid hormone (iPTH) levels to the norm were examined by CEUS to evaluate an incomplete ablation. We compared the serum iPTH and calcium levels and the nodule volumes before and after MWA. The complications were evaluated during and after treatment. RESULTS: Immediately following MWA, CEUS demonstrated complete ablation with all 44 parathyroid nodules. On post-ablation day 1, five nodules in five patients displayed annular enhancement around the ablation zone on CEUS. The average maximum diameters of the nodules and the ablation zone were 1.09 ± 0.28 cm and 1.36 ± 0.23 cm, respectively. An ablation zone larger than the primary lesion (p < 0.05) generated a higher rate of complete ablation. Compared with pre-MWA, serum iPTH and calcium levels were significantly improved. Treatment success was achieved in 38 patients (95%). Hoarseness was a major complication in six patients (15%); however, it improved spontaneously within 1-4 months. We observed two recurrences (2/40, 5%) at 9 months and 11 months following MWA, respectively. CONCLUSION: US-guided percutaneous MWA assisted by CEUS for pHPT is an effective and safe therapy. CEUS can avoid operative failure and improve the cure rate.

Association of plasma free fatty acids levels with the presence and severity of coronary and carotid atherosclerotic plaque in patients with type 2 diabetes mellitus.

BACKGROUND: Previous studies have suggested that patients with diabetes mellitus (DM) have higher prevalence of atherosclerotic cardiovascular disease (ASCVD), and plasma levels of free fatty acids (FFAs) are a useful marker for predicting ASCVD. We hypothesized that FFAs could predict both coronary and carotid lesions in an individual with type 2 DM (T2DM). The present study, hence, was to investigate the relation of plasma FFA level to the presence and severity of coronary and carotid atherosclerosis in patients with T2DM. METHODS: Three hundred and two consecutive individuals with T2DM who have received carotid ultrasonography and coronary angiography due to chest pain were enrolled in this study. Plasma FFAs were measured using an automatic biochemistry analyzer. Coronary and carotid severity was evaluated by Gensini score and Crouse score respectively. Subsequently, the relation of FFA levels to the presence and severity of coronary artery disease (CAD) and carotid atherosclerotic plaque (CAP) in whole individuals were also assessed. RESULTS: Increased plasma FFA levels were found in the groups either CAD or CAP compared to those without. Patients with higher level of FFAs had a higher CAD (89.9%) and elevated prevalence of CAP (69.7%). And also, patients with higher level of FFAs had a higher Gensini and Crouse scores. Multivariate regression analysis showed that FFA levels were independently associated with the presence of CAD and CAP (OR = 1.83, 95%CI: 1.27-2.65, P = 0.001; OR = 1.62, 95%CI: 1.22-2.14, P = 0.001, respectively). The area under the curve (AUC) was 0.68 and 0.65 for predicting the presence of CAD and CAP in patients with DM respectively. CONCLUSIONS: The present study firstly indicated that elevated FFA levels appeared associated with both the presence and severity of CAD and CAP in patients with T2DM, suggesting that plasma FFA levels may be a useful biomarker for improving management of patients with T2DM.

Does the use of a closed-suction drain reduce the effectiveness of an antibiotic-loaded spacer in two-stage exchange Arthroplasty for Periprosthetic hip infection? A prospective, randomized, controlled study.

BACKGROUND: There is a concern regarding the use of a closed-suction drain (CSD) in two-stage exchange arthroplasty for periprosthetic joint infection as it may decrease the antibiotic concentrations in the joint fluids. The purpose of this study was to identify whether the use of a CSD could reduce local antibiotic concentrations following spacer implantation. METHODS: A prospective, randomized, controlled trial was conducted at our institution between January 2018 and November 2018. We enrolled 32 patients undergoing two-stage exchange arthroplasty for periprosthetic hip infection with an interim cement spacer containing 4-g vancomycin and 2-g meropenem per 40-g methyl-methacrylate cement polymer. Patients were randomized and evenly divided into the study group (non-CSD) and control group (CSD group) by sealed envelopes. Drainage samples of joint fluids (n = 160) were collected every 24 h for the first five days following spacer implantation. The antibiotic concentrations of drainage samples were measured by high-performance liquid chromatography, and the bioactivities of the drainage samples against methicillin-sensitive and methicillin-resistant Staphylococcus aureus (MSSA and MRSA) and E. coli were assessed. RESULTS: There was no significant difference in the decrease of vancomycin (study group vs. control group: 163.20 ± 77.05 vs. 162.39 ± 36.31; p = 0.917) and meropenem concentration (123.78 ± 21.04 vs. 117.27 ± 19.38; P = 0.548) between the two groups during the first five days following spacer implantation. All joint drainage samples in each group exhibited antibacterial activity against MSSA, MRSA and E. coli. CONCLUSIONS: The use of CSD following the implantation of an antibiotic-loaded cement spacer does not reduce the effectiveness of such a spacer in two-stage exchange arthroplasty. (Chinese Clinical Trial Registry, ChiCTR-INR-17014162. Registered 26 December 2017.).

[Prostate sarcoma: A retrospective analysis of 26 cases].

OBJECTIVE: To present our experience in the diagnosis and treatment of prostate sarcoma and the clinical and prognostic features of the malignancy. METHODS: We retrospectively analyzed the clinical data on 26 cases of prostate sarcoma treated in our hospital from June 1998 to March 2018. The patients ranged in age from 15 to 64 years (ï¼»41 ± 14ï¼½ yr) and in the PSA level from 0.345 to 5.213 µg/L (ï¼»1.762 ± 1.184ï¼½ µg/L), all diagnosed with prostate sarcoma by prostatic biopsy and pathological examination after transurethral resection of the prostate (TURP). RESULTS: Postoperative pathological examination showed 11 cases of leiomyosarcoma, 6 cases of rhabdomyosarcoma, 4 cases of spindle cell sarcoma, 4 cases of fibrosarcoma and 1 case of undifferentiated sarcoma among the total number of patients. Twenty-four of the patients were followed up for 3 to 18 (mean 13) months, of whom 21 died within 12 months and the other 3 within 13－18 months after diagnosis, all due to extensive metastases. CONCLUSIONS: Prostate sarcoma is a rare malignancy clinically, highly aggressive and with very poor prognosis. Surgery remains the main treatment option, but multiple disciplinary diagnosis and treatment could probably achieve a better prognosis for prostate sarcoma.

MicroRNA-873 (miRNA-873) inhibits glioblastoma tumorigenesis and metastasis by suppressing the expression of IGF2BP1.

Glioblastoma multiforme (GBM) is known as a highly malignant brain tumor with a poor prognosis, despite intensive research and clinical efforts. In this study, we observed that microRNA-873 (miR-873) was expressed at low levels in GBM and that the overexpression of miR-873 dramatically reduced the cell proliferation, migration, and invasion of GBM cells. Our further investigations of the inhibition mechanism indicated that miR-873 negatively affected the carcinogenesis and metastasis of GBM by down-regulating the expression of IGF2BP1, which stabilizes the mRNA transcripts of its target genes. These results demonstrate that miR-873 may constitute a potential target for GBM therapy.

[Protective effects and mechanism of glycosides/phenol component of Moutan Cortex on renal injury of diabetic nephropathy rats].

To evaluate the protective effects of glycosides/phenol component of Moutan Cortex (MC) on renal injury of diabetic nephropathy (DN) rats based on renal function parameters and histopathological examinations(HE staining and transmission electron microscope),and explore its possible mechanism by establishing DN rat models induced by high-sugar high-fat diet combined with streptozotocin (STZ). The results showed that compared with the model group, the MC glycosides/phenol component high and low dose groups(0.808, 0.404 g•kg⁻¹â€¢d⁻¹) could significantly improve serum creatinine, blood urea nitrogen, urine protein and other abnormal renal function parameters. HE staining and transmission electron microscope results showed thickening of glomerular basement membrane, proliferation of mesangial cells and damages of podocyte structure in major rats of model group. However, the intervention of glycosides/phenol component of MC could effectively protect the glomerular injury. To explore its possible mechanism, the expressions of TGF-ß1, fibronectin (FN) and collagen Ⅳ in renal tissues of rats in each group were detected by Western blot and immunohistochemical assay, and the phosphorylation levels of downstream effect factors (Smad2/3, p38MARK) of TGF-ß1 were detected. The results showed that glycosides/phenol component of MC could effectively antagonize the activity of TGF-ß1, lower the expressions of fibronectin (FN) and collagen Ⅳ inextracellular matrix (ECM), and resist against the thickening of glomerular basement membrane. More importantly, its protective effect on renal injury in DN rats may be associated with interfering the conduction of Smad, MARK pathways and resisting against the TGF-ß1-induced ECM accumulation.

[Inhibitory effects of extracts from Moutan Cortex on formation of advanced glycation end-products (AGEs) in vitro and specificity screening of its potential active components].

In this study, bovine serum albumin (BSA)/methylglyoxal (MGO) non-enzymatic glycosylation reaction system was used for the evaluation of the inhibitory effects of Moutan Cortex extracts on the formation of AGEs. The HPLC-LC-ESI-MS/MS technology was adopted to test and indentify active components in Moutan Cortex against AGEs formation. The different concentrations of extracts (crude herb concentration 50, 100, 150, 200, 250 g•L⁻¹) from Moutan Cortexwas determined by fluorospectrophotometry, indicating an activity against AGEs formation in different concentrations of extracts, the inhibition ratio were (36.2±5.3)%, (43.5±6.2)%, (55.4±7.8)%, (68.6±6.7)%, (70.4±8.2)%, respectively after 6-day reaction in a dose dependent manner. Besides, the forming speed of AGEs tended to be steady after 24 h reaction. The HPLC technology was used to analyze chromatograms before and after the incubation of Moutan Cortex and methylglyoxal, identify changes in five chromatographic peaks and show decrease or increase in chromatographic peaks. These substances were trigalloyl glucose, tetragalloyl glucose, galloylpaeoniflorin, hexagalloyl glucose and benzoylpaeoniflorin after LC-ESI-MS/MS identification. Extracts from Moutan Cortex showed the remarkable inhibitory effects against formation of AGEs in BSA/glucose system. Furthermore, these potential active components might be associated with the efficacy of Moutan Cortex on treatment of diabetic nephropathy, which enriches basic studies for Moutan Cortex and provides ideas and reference basis for subsequent studies.

MicroRNA-124 involves in ankylosing spondylitis by targeting ANTXR2.

OBJECTIVES: A recent genome-wide association study or GWAS identified that anthrax roxin receptor 2 (ANTXR2) was one of the risk loci for ankylosing spondylitis (AS). Previous study also showed that ANTXR2 could potentially affect new bone formation. This study aimed to investigate the possible mechanisms of ANTXR2 involved in AS pathogenesis. METHODS: The expression level of ANTXR2 and miR-124 in peripheral blood was detected by quantitative real-time polymerase chain reaction or qRT-PCR. ANTXR2 was predicted to be a target gene of miR-124 by TargetScan, which was confirmed by luciferase reporter assays. Western blot analysis was used to further investigate the effect of miR-124 on c-Jun N-terminal kinase (JNK) activation and evaluate the activated status of autophagy. RESULTS: We evidenced that ANTXR2 was downregulated and miR-124 was upregulated in peripheral blood from AS patients. Intriguingly, miR-124 targeted ANTXR2 and overexpression of miR-124 in Jurkat cells notably inhibited ANTXR2 expression. ANTXR2 inhibition by miR-124 promoted JNK activation and induced autophagy. CONCLUSIONS: Our results suggested that miR-124 might induce autophagy to participate in AS by targeting ANTXR2, which might be implicated in pathological process of AS.

[Cordycepin protects podocytes from injury mediated by complements complex C5b-9].

OBJECTIVE: To explore the protective effect of Cordycepin (3'-deoxyadenosine), a bioactive compound of Cordyceps Sinensis, on injury of podocytes. METHODS: C5b-9-induced podocyte injury was used as a model of membranous nephropathy in vitro. This model was established using mouse podocyte cell line--MPC5. Cordycepin was given as an intervention. Ultra-micro morphological changes were observed by electron microscope. F-actin cytoskeleton and expression of nephrin were observed by fluorescence microscope. The phosphorylation of mitogen-activated protein kinase (MAPK) was measured by Western blot. RESULTS: Stimulated by C5b-9 for 3 h, MPC5 showed secondary foot processes, with cytoskeleton structure damaged, nephrin relocated from the cell surface to the cytoplasm, and cell signal pathway-p38, JNK and ERK activated. Cordycepin protected foot processes and cytoskeleton structures of podocytes, suppressed the redistribution of nephrin, and inhibited p38/JNK action. CONCLUSION: Cordycepin can protect podocyte from C5b-9-induced injury partly through inhibiting the activation of p38/JNK signaling pathway.

[Effect of different composition structures of total paeony glycoside component and total phenolic acid component of Chuanxiong Rhizome on human umbilical vein endothelial cells with hypoxic injury].

OBJECTIVE: To study the effect of different composition structures of total paeony glycoside (TPG) component and total phenolic acid of Ligusticum chuanxiong ( TLPA) on sodium dithionite (Na2S2O4) -induced human umbilical vein endothelial cells (HUVEC) hypoxic injury. The baseline geometric proportion was used to design different components structure. And then the best structure of components by cell injury model were optimized. METHOD: A HUVEC hypoxic injury model was established by being induced of Na2S2O4. Cell viability was measured by MTI colorimetric method, intracellular superoxide dismutase (SOD) activity, malondialdehyde (MDA), lactate dehydrogenase( LDH) levels, nitric oxide (NO) contents were measured by kits. At last, Western blot analysis was used to detect the expression of two proteins, Bcl-2 and Bax. RESULT: Compared with the model group, TPG component, TLPA component at different composition structures can significantly increase SOD activity and decrease MDA, LDH, NO levels (P < 0.01, P < 0.05). Paeoniae Radix Rubra and Chuanxiong Rhizoma components can downregulate the expression of Bax protein and upregulate the expression of Bcl-2 protein. The ratio of Bcl-2 and Bax was significantly increased (P < 0 01, P < 0 05), it means that cell apoptosis was inhibited. The results indicate that among all the component composition structures, TPG and TLPA component at the proportion of 8: 2 had the best protection on hypoxic injury of endothelial cells. CONCLUSION: TPG component and TLPA component can resist HUVEC hypoxia injury, the protective effect was the most evident under the structure of 8: 2, which may be due to the inhibition of intracellular lipid peroxidation and cell apoptosis.

Clinical implication of TMPRSS4 expression in human gallbladder cancer.

Altered expression of transmembrane protease/serine 4 (TMPRSS4) is observed in various types of human cancers. However, the clinical significance of TMPRSS4 expression in gallbladder cancer (GBC) remains largely unknown. The present study aims to explore the clinicopathological significance and prognostic value of TMPRSS4 in GBC. The levels of TMPRSS4 mRNA and protein in GBC tissues and adjacent noncancerous tissues were evaluated by quantitative reverse-transcriptase polymerase chain reaction and immunohistochemistry. To investigate the correlations between TMPRSS4 and the clinicopathological features of GBC, the expression of TMPRSS4 in 97 patients with GBC were detected by immunohistochemistry. The correlation of TMPRSS4 expression with patients' survival rate was assessed by Kaplan-Meier and Cox regression. Our results showed that the expression levels of TMPRSS4 mRNA and protein in GBC tissues were both significantly higher than those in adjacent noncancerous tissues. Immunohistochemical staining revealed that high TMPRSS4 expression was closely correlated with tumor size (P=0.032), histological grade (P=0.002), pathologic T stage (P=0.005), clinical stage (P=0.013), and lymph node metastasis (P=0.003). Moreover, the results of Kaplan-Meier analysis indicated that a high expression level of TMPRSS4 resulted in a significantly poor prognosis of GBC patients. Multivariate analysis showed that the status of TMPRSS4 expression was an independent prognostic factor for GBC patients. Our results showed that TMPRSS4 plays a key role in GBC and therefore may provide an opportunity for developing a novel therapeutic target as well as a prognostic marker in GBC.

[Management of chronic kidney disease guided by the theory of Traditional Chinese Medicine: an experimental study].

OBJECTIVE: To determine the impact of Traditional Chinese Medicine on patients with chronic kidney disease (CKD). METHODS: A total of 225 CKD patients in an outpatient department were recruited for this study, among whom 170 received regular Western and Chinese medicine treatments (control group) and 55 received treatments guided by the theory of Traditional Chinese Medicine (experimental group). The effectiveness of the treatments was determined through a pre-post comparison. RESULTS: Significant pre-intervention differences in age (P < 0.01), stage of glomerular filtration rate (GFR) (P = 0.007) and urine protein (P < 0.01) were found between the two groups of patients. But age, gender and proteinuria were not significant predictors on clinical outcomes of the patients in the multivariate regression models. The experimental group had a greater level of decrease in blood urea nitrogen (P < 0.01) and serum creatine (P < 0. 01) than the control group. No significant differences between the groups were found in changes of uric acid (P = 0.475), urine protein (P = 0.058), urine red cells (P = 0.577), and urine white cells (P = 0.01). A greater level of increase in estimated glomerular filtration rate was found in the experimental group compared with the control (P < 0.001). The multivariate linear regression analysis identified group (B = 0.395, P < 0.001) and stage of GFR (B = 0.165, P = 0.008) as significant predictors on the outcomes of treatment. CONCLUSION: The treatment of CKD patients guided by the theory of Traditional Chinese Medicine can improve renal function through influencing glomerular filtration rate. The effect is more prominent than the regular treatment regime.

[New exploration on effect of characteristics of traditional Chinese medicine components structure on multi-ingredient/component pharmacokinetics].

The study on the pharmacokinetics of traditional Chinese medicines (TCMs) is a linking science during the modernization of TCMs, and plays an important role in the studies on the complex material base of TCMs, the in vivo process of ingredient/ component and the pharmacokinetics-pharmacodynamics correlation. However, because of the multi-ingredient/component system of TCMs, how to scientifically reveal the pharmacokinetics that is consistent with TCMs' characteristics has long been a hotspot and difficulty for the exploration. The optimal composition structure of the material basis of TCMs shows the best efficacy, while the difference between the multi-ingredient/component composition structures in the efficacy is closely related to their absorption, transport, metabolism and excretion in vivo. In this article, the authors systematically review the study methods for pharmacokinetics of TCMs and their compounds, and explore the pharmacokinetics of TCMs based on the "component structure theory". As a result, the method for integrating TCM component structure and the TCM pharmacokinetics was proposed to be adopted to intensively study the effect of the component structure on the in vivo TCM multi-ingredient/component pharmacokinetic characteristics, in order to promote the TCM modernization and innovation in China.

[Establishment of industry promotion technology system in Chinese medicine secondary exploitation based on "component structure theory"].

The purpose of the secondary exploitation of Chinese medicine is to improve the quality of Chinese medicine products, enhance core competitiveness, for better use in clinical practice, and more effectively solve the patient suffering. Herbs, extraction, separation, refreshing, preparation and quality control are all involved in the industry promotion of Chinese medicine secondary exploitation of industrial production. The Chinese medicine quality improvement and industry promotion could be realized with the whole process of process optimization, quality control, overall processes improvement. Based on the "component structure theory", "multi-dimensional structure & process dynamic quality control system" and systematic and holistic character of Chinese medicine, impacts of whole process were discussed. Technology systems of Chinese medicine industry promotion was built to provide theoretical basis for improving the quality and efficacy of the secondary development of traditional Chinese medicine products.

[Establishment of prescription research technology system in Chinese medicine secondary exploitation based on "component structure" theory].

Chinese medicine prescriptions are the wisdom outcomes of traditional Chinese medicine (TCM) clinical treatment determinations which based on differentiation of symptoms and signs. Chinese medicine prescriptions are also the basis of secondary exploitation of TCM. The study on prescription helps to understand the material basis of its efficacy, pharmacological mechanism, which is an important guarantee for the modernization of traditional Chinese medicine. Currently, there is not yet dissertation n the method and technology system of basic research on the prescription of Chinese medicine. This paper focuses on how to build an effective system of prescription research technology. Based on "component structure" theory, a technology system contained four-step method that "prescription analysis, the material basis screening, the material basis of analysis and optimization and verify" was proposed. The technology system analyzes the material basis of the three levels such as Chinese medicine pieces, constituents and the compounds which could respect the overall efficacy of Chinese medicine. Ideas of prescription optimization, remodeling are introduced into the system. The technology system is the combination of the existing research and associates with new techniques and methods, which used for explore the research thought suitable for material basis research and prescription remodeling. The system provides a reference for the secondary development of traditional Chinese medicine, and industrial upgrading.

[Effect of Moutan Cortex on AGEs-induced mesangial cell proliferation and basement membrane thickening].

OBJECTIVE: To investigate the effect of Moutan Cortex on mesangial proliferation and basement membrane thickening induced by advanced glycation end products (AGEs). METHOD: The glomerular mesangial cells (MC) injury model was established by inducing by AGEs. The cell were divided into 6 groups: the blank group ( BSA, 200 mg L-1) , the model group (AGEs, 200 mg L-1), the positive control group (AG, 10 mmol L L-1), and drug administration groups, namely the Moutan Cortex-treated high-dose group (2 x 10(-4) g mL(- 1)), the Moutan Cortex-treated medium-dose group (1 x 10(-4) g mL-1 ), and the Moutan Cortex-treated low-dose group (0. 5 x 10(-4) g . mL(-1)). The MTT method was performed to observe the effect of Moutan Cortex on the proliferation of MC. The content of fibronectin (FN) and collagen secretion 1V (Col IV) in cell supernatant were detected by ELISA kits. The western blot analysis was carried out to observe the FN expression. The Real-time PCR analysis was applied to examine the Col IV mRNA expression. RESULT: AGEs significantly increased AGEs-induced MC proliferation and FN and Col 1V secretion. The western blot analysis showed that MC could down-regulate the FN expression of MC secretion. According to the results of the real-time PCR assay, MC could down-regulate AGEs-induced MC secretion Col IV mRNA expression. CONCLUSION: MC had a certain protective effect on MC cultured under AGEs conditions. MC could remarkably inhibit the composition and secretion of Col IV and FN in matrix and the basement membrane thickening, and provide an experimental basis for the treatment of diabetic nephropathy.

Treatment with hydrogen molecule alleviates TNFα-induced cell injury in osteoblast.

Tumor necrosis factor-alpha (TNFα) plays a crucial role in inflammatory diseases such as rheumatoid arthritis and postmenopausal osteoporosis. Recently, it has been demonstrated that hydrogen gas, known as a novel antioxidant, can exert therapeutic anti-inflammatory effect in many diseases. In this study, we investigated the effect of treatment with hydrogen molecule (H(2)) on TNFα-induced cell injury in osteoblast. The osteoblasts isolated from neonatal rat calvariae were cultured. It was found that TNFα suppressed cell viability, induced cell apoptosis, suppressed Runx2 mRNA expression, and inhibited alkaline phosphatase activity, which was reversed by co-incubation with H(2). Incubation with TNFα-enhanced intracellular reactive oxygen species (ROS) formation and malondialdehyde production increased NADPH oxidase activity, impaired mitochondrial function marked by increased mitochondrial ROS formation and decreased mitochondrial membrane potential and ATP synthesis, and suppressed activities of antioxidant enzymes including SOD and catalase, which were restored by co-incubation with H(2). Treatment with H(2) inhibited TNFα-induced activation of NFκB pathway. In addition, treatment with H(2) inhibited TNFα-induced nitric oxide (NO) formation through inhibiting iNOS activity. Treatment with H(2) inhibited TNFα-induced IL-6 and ICAM-1 mRNA expression. In conclusion, treatment with H(2) alleviates TNFα-induced cell injury in osteoblast through abating oxidative stress, preserving mitochondrial function, suppressing inflammation, and enhancing NO bioavailability.

Antioxidative and anti-inflammatory activities of paeoniflorin and oxypaeoniflora on AGEs-induced mesangial cell damage.

Paeonia suffruticosa, an important traditional herbal medicine, has been reported to prevent the pathogenesis of diabetic nephropathy through modulating advanced glycation end products-induced inflammatory and oxidative stress responses. However, little was known about the protective effect of the two major compounds in P. suffruticosa, paeoniflorin and oxypaeoniflora, on advanced glycation end products-induced mesangial cell damage. In the present study, we investigated the protective activities of paeoniflorin and oxypaeoniflora on advanced glycation end product-induced oxidative stress and inflammation in mesangial cells HBZY-1. The IC50 values of paeoniflorin and oxypaeoniflora for inhibiting 2,2'-azinobis-(3-thylbenzothiazoline-6-sulfonic acid) formation were 4.197 × 10-4 M and 1.002 × 10-4 M, respectively. The pretreatment with paeoniflorin and oxypaeoniflora (10-8-10-4 M) significantly increased advanced glycation end product-induced glutathione peroxidase and catalase activities. In the coculture system of HBZY-1 and macrophages, paeoniflorin and oxypaeoniflora could inhibit remarkably the migration of macrophages. Furthermore, paeniflorin and oxypaeniflora attenuated markedly advanced glycation end products-induced inflammation cytokines interleukin-6 and monocyte chemoattractant protein-1 levels in ELISA and western blot analysis in a dose-dependent manner. Taken together, our data provided the reliable evidence that paeniflorin and oxypaeniflora were able to attenuate advanced glycation end products-induced oxidative damage and inflammation in mesangial cells. Paeniflorin and oxypaeniflora might therefore have a beneficial effect in the treatment of diabetic nephropathy.