TOXICOLOGY AND APPLIED PHARMACOLOGY
·
2019
·
IF 3.585
Xue-Ying Wang,Dan Mo,Wen Tian,Xiao-Xiao Liu,Ya-Guang Zhou,Yang Sun,Ying-Da Feng,Xiong Xiao,Xiao-Wei Hao,Hui-Nan Zhang,Chen Li,Wei Cao,Xiao-Qiang Li
Hypoxic pulmonary vasoconstriction (HPV) can be modulated by Rho/Rho kinase signaling, which can alter HPV vascular function via regulating myosin light chain phosphorylation, in a manner generally believed to be Ca 2+ -independent. We hypothesized that the RhoA/ROCK signaling pathway also can regulate HPV vascular function via a Ca 2+ -dependent mechanism, signaling through the functional transient receptor potential canonical (TRPC) channels. In this study, male BALB/c mice were exposed to normoxic or 10% oxygen (hypoxic) conditions for six weeks, after which systolic pressure and right ventricular hypertrophy were assessed. Transient intracellular calcium was monitored using a fluorescence imaging system. Muscle tension was measured with a contractile force recording system, and protein expression was assessed by immunoblotting . We found that the expressions of RhoA and ROCK were increased in mouse pulmonary arteries (PAs) under conditions of chronic hypoxia . Inhibition of the RhoA/ROCK signaling pathway prevented the development of hypoxic pulmonary hypertension (HPH), as evidenced by significantly reduced PA remodeling and pulmonary vasoconstriction. Immunoblotting results revealed that inhibition of the RhoA/ROCK signaling pathway significantly decreased the expression of HIF-1α. Knockdown of HIF-1α down-regulated the expression and function of the TRPC1 and TRPC6 channels in PASMCs under conditions of hypoxia. Contraction of the PAs and a Ca 2+ influx into PASMCs through either receptor- or store-operated Ca 2+ channels were also increased after hypoxia. However, RhoA/ROCK inhibitors markedly attenuated these changes. These results indicate that inhibition of the RhoA/ROCK signaling pathway ameliorates HPH via HIF-1α-dependent functional TRPCs.
研究领域:
心血管生理学
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分子生物学
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药理学
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产品关联
DOI
PubMed
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2021
·
IF 5.89
Dong Wenpei,Song Zhicheng,Liu Suihong,Yu Ping,Shen Zhipeng,Yang Jianjun,Yang Dongchao,Hu Qinxi,Zhang Haiguang,Gu Yan
Application of synthetic or biological meshes is the main therapy for the repair and reconstruction of abdominal wall defects, a common disease in surgery. Currently, no ideal materials are available, and there is an urgent need to find appropriate ones to satisfy clinical needs. Electrospun scaffolds have drawn attention in soft tissue reconstruction. In this study, we developed a novel method to fabricate a composite electrospun scaffold using a thermoresponsive hydrogel, poly (N-isopropylacrylamide)-block-poly (ethylene glycol), and a biodegradable polymer, polylactic acid (PLA). This scaffold provided not only a high surface area/volume ratio and a three-dimensional fibrous matrix but also high biocompatibility and sufficient mechanical strength, and could simulate the native extracellular matrix and accelerate cell adhesion and proliferation. Furthermore, rat adipose-derived stem cells (ADSCs) were seeded in the composite electrospun scaffold to enhance the defect repair and regeneration by directionally inducing ADSCs into endothelial cells. In addition, we found early vascularization in the process was regulated by the hypoxia inducible factor-1α (HIF-1α)/vascular endothelial growth factor (VEGF) pathway. In our study, overexpression of HIF-1α/VEGF in ADSCs using a lentivirus system promoted early vascularization in the electrospun scaffolds. Overall, we expect our composite biomimetic scaffold method will be applicable and useful in abdominal wall defect regeneration and repair in the future.
研究领域:
组织工程
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生物材料
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再生医学
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外科研究
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产品关联
DOI
PubMed
高影响因子
Bioengineered
·
2022
·
IF 6.832
Xiao-Yi Chen,Qian-Long Wang,Wei-Xue Huang,Long-Wei Li,Lan-Cong Liu,Yi Yang,You-Jiao Wu,Shan-Shan Song,Hao Ma,Hua Zhou,Pei Luo
Bacterial peritonitis is a severe disease that diagnosis remains challenging for clinicians. Measuring biomarkers might be a rapid diagnostic method. The objective of this study was to analyze and evaluate the dynamic changes in HIF-1α concentration in serum exosomes during bacterial peritonitis. The pre-clinical application value of serum exosomal HIF-1α was evaluated via imipenem and cilastatin sodium (ICS) intervention in the bacterial peritonitis model. The new colorimetric method to quantitate dynamic expression changes of HIF-1α in serum exosomes during bacterial peritonitis was established by our team via using the gold seed-coated with aptamer-functionalized Au @ Au core-shell peroxidase mimic. The typical inflammatory cytokines of bacterial peritonitis were also measured. Following intramuscular administration with ICS, In-Vivo Xtreme imaging system was used to visualize abdominal infection extent. Meanwhile, HIF-1α concentration in rat serum exosomes and pro-inflammatory factors levels in serum were detected. The serum typical inflammatory cytokines levels were elevated in GFP-labeled E.coli induced bacterial peritonitis. The serum exosomal HIF-1α levels clearly increased at 12 h, reached the peak during 24–48 h, and then gradually decreased at 72 h. Following intramuscular administration with ICS, the abdominal infection extent, HIF-1α concentration in serum exosomes, and the serum pro-inflammatory factors levels were reduced at 24 h in GFP-labeled E. coli induced bacterial peritonitis model. The serum exosomal HIF-1α can be used as a biomarker in the early stage of bacterial peritonitis, which might provide the basic research in the pre-clinical for further predicting and monitoring the pathological process of bacterial peritonitis.
研究领域:
医学诊断
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药理学
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传染病学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Biomaterials Science
·
2021
·Vol. 9
·期 19
·6403-6415
·
IF 6.843
Li-Jun Zhang,Rui Huang,Yi-Wen Shen,Jie Liu,Ye Wu,Jin-Mei Jin,Hong Zhang,Yun Sun,Hong-Zhuan Chen,Xin Luan
Tumor hypoxic stress after photodynamic therapy (PDT) will be inevitably exacerbated by the vascular blocking effects and oxygen consumption in the tumor microenvironment (TME) which usually leads to compromised efficacy and clinical performance. Increasing evidence links the hypoxia induced up-regulation of hypoxia inducible factor 1α (HIF-1α) with immunosuppressive TME, including the polarization of M2 phenotype tumor associated macrophages (TAMs), which promote the recurrence and metastasis. Here, we reported NIR-triggered core-satellite upconverting nanoparticles (CSNPs) with curcumin (Cur) embedded as a difunctional photosensitizer, which could realize PDT in deep tumors with long excitation wavelength (980 nm) and reverse the immunosuppressive TME induced by up-regulated HIF-1α at the same time. This Cur-loaded CSNPs (Cur–CSNPs)-mediated PDT could successfully induce the immunogenic cell death (ICD) of triple negative breast cancer (TNBC) cell lines (4T1 and MDA-MB-231) in vitro and repolarize the 4T1 cells co-cultured TAMs from pro-tumor M2 to the anti-tumor M1 phenotype. Furthermore, Cur–CSNPs-mediated PDT could suppress the 4T1 tumor growth in primary and distant sites through the synergistic immunotherapeutic effects in vivo by priming M1 type TAMs and CD4+/CD8+ T cells’ infiltration. Our data highlight the novel application of CSNPs-embedded Cur as a difunctional photosensitizer to enhance the anti-tumor efficacy of PDT.
研究领域:
肿瘤学
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免疫学
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纳米医学
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产品关联
DOI
PubMed
高影响因子
CHEMICO-BIOLOGICAL INTERACTIONS
·
2025
·
IF 5.4
Lili Lu,Yuchen Ma,Qing Tao,Jing Xie,Xiao Liu,Yongkang Wu,Yang Zhang,Xiuli Xie,Mingming Liu,Yong Jin
Liver fibrosis is a passive and irreversible wound healing process caused by chronic liver injury. Research has shown that the upregulation of hypoxia inducible factor-1 alpha (HIF-1α) is closely related to the occurrence and development of liver fibrosis and HIF-1 α may be a promising target for the treatment of liver fibrosis. AMSP-30 m is a newly developed novel HIF-1α inhibitor by our group, which has strong anti-tumor and anti-inflammatory effects. In this study, we described the therapeutic effect and specific mechanism of AMSP-30 m on carbon tetrachloride (CCl 4 ) induced liver fibrosis in mice. Liver fibrosis induced by CCl 4 in mice and liver fibrosis induced by cobalt dichloride (CoCl 2 ) in LX-2 cells (human hepatic stellate cell (HSC) line) were studied. Hematoxylin & eosin (H&E)and Masson's trichrome staining were used to observe pathological conditions. Western Blot, immunofluorescence and immunohistochemistry were used to detect protein expression and localization in cells, and quantitative real-time PCR analysis (qRT-PCR) was used to detect mRNA expression. Biochemical detection kits were used to detect alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels. The results demonstrated that AMSP-30 m significantly alleviated pathological symptoms, reduced ALT and AST levels, and inhibited the expression of alpha-smooth muscle actin (α-SMA) and collagen type I (COL1α1) in CCl 4 -induced liver fibrosis in mice. AMSP-30 m could significantly reduce the expression of HIF-1α and sonic hedgehog (Shh) pathway related proteins (Smoothened (Smo), Shh, and glioma-associated oncogene-1 (Gli-1)) in CCl 4 induced liver fibrosis mice. AMSP-30 m also played a similar role in the CoCl 2 -induced anoxic liver fibrosis model of LX-2 cells . Further experiments showed that Cyclopamine (a Shh inhibitor) could significantly inhibit the increase of α-SMA and COL1α1 resulting from HIF-1α but not significantly inhibit HIF-1α induced by CoCl 2 in LX-2 cells. And the combination of Cyclopamine and AMSP-30 m further reduced the expression of α-SMA and COL1α1 induced by HIF-1α. In summary, this study demonstrates that the HIF-1α inhibitor AMSP-30 m exerts a robust anti-fibrotic effect by inhibiting the Shh pathway, which is identified as a critical underlying mechanism. These findings suggest a promising therapeutic strategy for the treatment of liver fibrosis.
研究领域:
分子生物学
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药理学
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肝病学
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细胞生物学
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生物化学
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DOI
PubMed
高影响因子
EXPERIMENTAL CELL RESEARCH
·
2023
·
IF 3.7
Lirong Zou,Xinling Wang,Xiao Han
The retina may undergo structural and functional damage as a result of hypoxia, which could lead to permanent blindness. As competing endogenous RNAs (ceRNAs), lncRNAs are essential in eye disorders. The biological function of lncRNA MALAT 1 and its potential mechanisms in hypoxic-ischemic retinal diseases are still unknown. MALAT 1 and miR-625–3p expression alterations in hypoxia-treated RPE cells were examined using qRT-PCR. The target binding relationships between MALAT 1 and miR-625–3p, as well as between miR-625–3p and HIF-1α, were identified utilizing bioinformatics analysis and dual luciferase reporter assay. We observed that si-MALAT 1 and miR-625–3p mimic both reduced apoptosis and epithelial-mesenchymal transition (EMT) in hypoxic RPE cells, whereas si-MALAT 1 was reversed by miR-625–3p inhibitor. Further, we carried out a mechanistic investigation, and rescue assays demonstrated that MALAT 1 sponging miR-625–3p influenced HIF-1α expression and consequently took part in the NF-κB/Snail signaling pathway , which regulated apoptosis and EMT. In conclusion, our research had shown that the MALAT 1/miR-625–3p/HIF-1α axis drove the progression of hypoxic-ischemic retinal disorders and may serve as a promising predictive biomarker for their therapeutic and diagnostic targets.
研究领域:
眼科学
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分子生物学
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细胞生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
·
2024
·Vol. 28
·期 20
·e70127
·
IF 4.3
Ming Zhang,Guan-Chun Dai,Yuan-Wei Zhang,Pan-Pan Lu,Hao Wang,Ying-Juan Li,Yun-Feng Rui
Diabetic calcific tendinopathy is the leading cause of chronic pain, mobility restriction, and tendon rupture in patients with diabetes. Tendon stem/progenitor cells (TSPCs) have been implicated in the development of diabetic calcified tendinopathy, but the molecular mechanisms remain unclear. This study found that diabetic tendons have a hyperoxic environment, characterized by increased oxygen delivery channels and carriers. In hyperoxic environment, TSPCs showed enhanced osteogenic differentiation and increased levels of reactive oxygen species (ROS). Additionally, hypoxia-inducible factor-1a (HIF-1a), a protein involved in regulating cellular responses to hyperoxia, was decreased in TSPCs by the ubiquitin-proteasome system. By intervening with antioxidant N-acetyl-L-cysteine (NAC) and overexpressing HIF-1a, we discovered that blocking the ROS/HIF-1a signalling axis significantly inhibited the osteogenic differentiation ability of TSPCs. Animal experiments further confirmed that hyperoxic environment could cause calcification in the Achilles tendon tissue of rats, while NAC intervention prevented calcification. These findings demonstrate that hyperoxia in diabetic tendons promotes osteogenic differentiation of TSPCs through the ROS/HIF-1a signalling axis. This study provides a new theoretical basis and research target for preventing and treating diabetic calcified tendinopathy.
研究领域:
糖尿病
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干细胞生物学
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细胞信号传导
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骨科
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分子生物学
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产品关联
DOI
PubMed
高影响因子
Asian Journal of Pharmaceutical Sciences
·
2025
·
IF 11.9
Zhiyuan Tang,Yuening Sun,Quanhua Yi,Qian Ding,Yang Ding,Jianfei Huang
The effective intracellular accumulation of doxorubicin (DOX) is crucial for improving antitumor efficacy, which is severely impeded by limited drug penetration, uncontrollable drug release, and drug resistance. In this study, a thermal-deformative polymer embedding ultrasmall ceria (CeO 2 ) was rationally designed for deep tumor drug shuttling and hypoxia reversal to improve chemotherapy. Structurally, the CeO 2 nanozyme was covalently grafted with a polymer of p(NIPAM-co-AM) that could sharply shrink for DOX loading, which was consolidated with polydopamine (PDA) film encapsulation. Thereafter, a tumor penetration guide of apolipoprotein A-I (apoA-I) conjugated iRGD peptide (apoA-I-iRGD) was further decorated onto the PDA shell via Michael addition for preparing CeO 2 P/DOX@iAPDA. With the aid of apoA-I-iRGD, CeO 2 P/DOX@iAPDA penetrated both the tumor spheroids (∼78 μm) and the tumors of the mouse model deeply. After internalization by tumor cells and triggering by low pH in lysosomes, rapid DOX release was achieved by peeling off the PDA shell and thermosensitive deformation of p(NIPAM-co-AM). CeO 2 P/DOX@iAPDA provided 66.4% tumor suppression in 4T1-derived tumor spheroids and 63.2% in 4T1-tumor-bearing mice, respectively. Preliminary mechanistic research involving western blotting and immunohistochemistry revealed that CeO 2 P/DOX@iAPDA reversed resistance through the through HIF-1α-P-gp/lipid axis. Collectively, this study intelligently integrated CeO 2 nanozymes, temperature-sensitive polymers, and imitated biochemical modifications to improve chemotherapy for breast cancer.
研究领域:
纳米技术
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癌症治疗
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药学科学
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生物医学工程
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROBIAL PATHOGENESIS
·
2024
·
IF 3.3
Xiaoye Cheng,Yijin Jiang,Xu Zhao,Nana Ma,Xiangzhen Shen
Lactate has been increasingly recognized for its role in diseases progression, necessitating a deeper understanding of its metabolic processes and regulatory mechanisms. This study aimed to evaluate the impact of lipopolysaccharide (LPS) on lactate accumulation in bovine mammary epithelial cells (BMECs) and to elucidate the underlying regulatory mechanisms. Further optimization of LPS treatment points was achieved by assessing the content of key glycolytic enzymes-hexokinases (HK), pyruvate kinase (PK) and pyruvate dehydrogenase (PDH)-as well as the expression levels of HK2, pyruvate dehydrogenase kinase4 (PDK4) and lactate dehydrogenase (LDHA). Our results indicate that LPS can promote intracellular glycolysis and inhibits pyruvate synthesis, thereby increasing lactate content. BMECs were cultured and divided into a control group (CON) and an LPS-stimulated group (10 μg/mL for 6 h, LPS group). LPS was found to upregulate expression levels of HIF-1α and MCT1, suggesting a role for HIF-1α and MCT1 in cellular glucose metabolism. To explore the effect of HIF-1α on lactate accumulation, BMECs were stimulated with a HIF-1α inducer (COCL 2 ) and HIF-1α inhibitor (DMBPA). COCL 2 was observed to promote lactate accumulation, while DMBPA inhibited it. Additionally, modulation of HIF-1α expression influenced the expression of MCT1, which is a crucial transporter for extracellular lactate influx. To investigate the specific impact of MCT1 on intracellular lactate, we utilized overexpression plasmids and small interfering RNA to modulate MCT1 expression. The findings indicate that while MCT1 expression alone does not affect intracellular lactate levels, it does modulate the changes induced by LPS. In conclusion, our study suggests that LPS regulates lactate accumulation in BMECs through the HIF-1α/MCT1 pathway, providing insights into the metabolic dysregulation associated with LPS-induced stress in dairy cattle.
研究领域:
动物科学
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细胞生物学
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代谢学
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乳品科学
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产品关联
DOI
PubMed
高影响因子
MOLECULAR MEDICINE
·
2024
·Vol. 30
·期 1
·1-15
·
IF 6
Zhang FengQi,Zhang YiYang,Zhou JiaWang,Cai Ying,Li ZhiYu,Sun Jing,Xie ZhiJun,Hao GuiFeng
Background Rheumatoid arthritis, a chronic autoimmune disease, is characterized by synovial hyperplasia and cartilage erosion. Here, we investigated the potential mechanism of action of quercetin, the main component of flavonoids, in treating rheumatoid arthritis. Object To examine the anti-arthritic effects of quercetin and elucidate the specific mechanisms that differentiate its metabolic effects on autoimmune and inflammatory responses at the synovial cell level. Methods We created a collagen-induced arthritis (CIA) model in Wistar rats, which were administered quercetin (50 or 100 mg/kg) continuously for four weeks via stomach perfusion. The arthritis score, histopathological staining, radiological assessment, and serum biochemical parameters were used to study the impact of quercetin on disease improvement. Additionally, immunofluorescence was employed to detect JAK1/STAT3/HIF-1α expression in rat joints. Moreover, the effects of quercetin (20, 40, and 80 µmol/L) on the properties and behavior of synovial fibroblasts were evaluated in an in vitro MH7A cell model using flow cytometry, CCK8, and transwell assays. Further, the mRNA expression levels of inflammatory cytokines IL1β, IL6, IL17, and TNFα were assessed by quantitative real-time PCR. Glucose, lactate, lactate dehydrogenase, pyruvate, pyruvate dehydrogenase, and adenosine triphosphate assay kits were employed to measure the metabolic effects of quercetin on synovial fibroblasts. Finally, immunoblotting was used to examine the impact of quercetin on the JAK1/STAT3/HIF-1α signaling pathway in synovial fibroblasts. Results In vivo experiments confirmed the favorable effects of quercetin in CIA rats, including an improved arthritis score and reduced ankle bone destruction, in addition to a decrease in the pro-inflammatory cytokines IL-1β, IL-6, IL-17, and TNF-α in serum. Immunofluorescence verified that quercetin may ameliorate joint injury in rats with CIA by inhibiting JAK1/STAT3/HIF-1α signaling. Various in vitro experiments demonstrated that quercetin effectively inhibits IL-6-induced proliferation of MH7A cells and reduces their migratory and invasive behavior, while inducing apoptosis and reducing the expression of the pro-inflammatory cytokines IL1β, IL6, IL17, and TNFα at the mRNA level. Quercetin caused inhibition of glucose, lactate, lactate dehydrogenase, pyruvate, and adenosine triphosphate and increased pyruvate dehydrogenase expression in MH7A cells. It was further confirmed that quercetin may inhibit energy metabolism and inflammatory factor secretion in MH7A cells through JAK1/STAT3/HIF-1α signaling. Conclusions Quercetin’s action on multiple target molecules and pathways makes it a promising treatment for cartilage injury in rheumatoid arthritis. By reducing joint inflammation, improving joint metabolic homeostasis, and decreasing immune system activation energy, quercetin inhibits the JAK1/STAT3/HIF-1α signaling pathway to improve disease status.
研究领域:
免疫学
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药理学
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风湿病学
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分子生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF PHARMACY AND PHARMACOLOGY
·
2023
·
IF 3.3
Zeng Xiangfeng,Liu Shengyao,Yang Hua,Jia Menglei,Liu Wei,Zhu Wenting
ObjectivesThe most common cause of osteosarcoma (OS) death is lung metastasis. Currently, doxorubicin is the primary chemotherapy drug used to treat OS, however, it is not effective in inhibiting metastasis, and it has obvious cardiotoxicity. The anticancer activity of ginsenoside Rg3 has been demonstrated in a variety of malignant tumours. The aim of this study was to determine the potential role of ginsenoside Rg3 and doxorubicin in OS and the possible mechanism.MethodsThe potential synergistic effects of ginsenoside Rg3 and doxorubicin on human osteosarcoma cells 143B and U2OS, human umbilical vein endothelial cells, and mice receiving 143B xenografts and lung metastases were investigated.Key findingsOur study demonstrated that the combination of ginsenoside Rg3 and doxorubicin significantly inhibited cell proliferation, metastasis and angiogenesis in vitro. Mechanically, the anti-tumour activity of ginsenoside Rg3 and doxorubicin by modulating mTOR/HIF-1α/VEGF and EMT signalling pathways. Furthermore, ginsenoside Rg3 combined with doxorubicin inhibits tumour growth and lung metastasis in 143B-derived murine osteosarcoma models. More importantly, ginsenoside Rg3 can effectively ameliorate doxorubicin-induced weight loss and cardiotoxicity in mice.ConclusionsConsequently, we concluded that the combination of ginsenoside Rg3 and doxorubicin displayed an evidently synergistic effect, which has the potential to be used as an effective and safe therapeutic approach for OS treatment.
研究领域:
肿瘤学
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药理学
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细胞生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2019
·Vol. 187
·期 1
·1-11
·
IF 5.479
Wang Qian-Long,Huang Wei-Xue,Zhang Pu-Juan,Chen Li,Lio Chon-Kit,Zhou Hua,Qing Lin-Sen,Luo Pei
An ultra-sensitive method is described here for the determination of HIF-1α (an early biomarker for myocardial infarction) in circulating exosomes in serum. Gold nanospheres were functionalized with a HIF-1α-binding aptamer via sulfydryl chemistry. The apt-AuNP-coated gold seeds were grown by seed-mediated growth, and this significantly increased the peroxidase-mimicking property the nanoparticles. A chromogenic system composed of 3,3′5,5′-tetramethylbenzidine and hydrogen peroxide was used. Absorbance at 652 nm increases linearly in the 0.3 to 200 ng L −1 HIF-1α concentration range, and the limit of detection is 0.2 ng L −1 . The method was tested by analyzing rat serum from isoproterenol (ISO)-induced myocardial infarction. It allows HIF-1α to be directly determined in a 25 μL sample without preconcentration. The assay is not interfered by the polydispersity of exosomes released under either health and disease conditions.
Gold nanospheres were functionalized with a HIF-1α-binding aptamer via sulfydryl chemistry. Nanosized gold seed particles were then modified with the functionalized gold nanospheres, and this strongly increases the peroxidase-mimicking activity of the nanomaterial. By using the tetramethylbenzidine/H 2 O 2 chromogenic system, the absorbance at 652 nm increases linearly in the 0.3 to 200 ng L -1 HIF-1α concentration range.
研究领域:
纳米技术
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生物传感器
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分析化学
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心脏病学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）