Materials Today Bio
·
2024
·
IF 8.7
Yannan Cheng,Yuanfang Huo,Yongle Yu,Ping duan,Xianzhen Dong,Zirui Yu,Qiang Cheng,Honglian Dai,Zhenyu Pan
Managing bone defects remains a formidable clinical hurdle, primarily attributed to the inadequate orchestration of vascular reconstruction and osteogenic differentiation in both spatial and temporal dimensions. This challenge persists due to the constrained availability of autogenous grafts and the limited regenerative capacity of allogeneic or synthetic bone substitutes, thus necessitating continual exploration and innovation in the realm of functional and bioactive bone graft materials. While synthetic scaffolds have emerged as promising carriers for bone grafts, their efficacy is curtailed by deficiencies in vascularization and osteoinductive potential. Nitric oxide (NO) plays a key role in revascularization and bone tissue regeneration, yet studies related to the use of NO for the treatment of bone defects remain scarce. Herein, we present a pioneering approach leveraging a photothermal-responsive system to augment NO release. This system comprises macromolecular mPEG-P nanoparticles encapsulating indocyanine green (ICG) (NO-NPs@ICG) and a mPEG-PA-PP injectable thermosensitive hydrogel carrier. By harnessing the synergistic photothermal effects of near-infrared radiation and ICG, the system achieves sustained NO release, thereby activating the soluble guanylate cyclase (sGC)-cyclic guanosine monophosphate (cGMP) signaling pathway both in vitro and in vivo. This orchestrated cascade culminates in the facilitation of angiogenesis and osteogenesis, thus expediting the reparative processes in bone defects. In a nutshell, the NO release-responsive system elucidated in this study presents a pioneering avenue for refining the bone tissue microenvironment and fostering enhanced bone regeneration.
研究领域:
生物材料
·
组织工程
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再生医学
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生物医学工程
·
药学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANTI-CANCER DRUGS
·
2019
·Vol. 30
·期 1
·46-55
·
IF 1.801
Lin Fuxing,Yang Jie,Muhammad Umair,Sun Jing,Huang Zhenghua,Li Wei,Lv Fengxia,Lu Zhaoxin
Bacillomycin D can inhibit the growth of Aspergillus ochraceus in food samples. In addition, it can induce apoptosis in and inhibit the proliferation of cancer cells, although the details of this mechanism are unknown. In this study, we separated bacillomycin D-C14, D-C15, D-C16
monomers from the Bacillus subtilis strain fmbJ. The bacillomycin D monomers containing longer fatty acid chains better induced apoptosis in Bgc-823, Sgc-7901, and Hgc-27 gastric cancer cells. The Bgc-823 cell line was the most sensitive. Acridine orange-ethidium bromide staining indicated
that bacillomycin D-C16-induced Bgc-823 cell death by triggering apoptosis, characterized by membrane blebbing, cellular shrinkage, and DNA fragmentation. Flow cytometric analysis showed a bacillomycin D-C16 dose-dependent trigger of Bgc-823 apoptosis. Bacillomycin D-C16-induced the mitochondrial
pathway, as indicated by a reduced Bcl-2/Bax expression ratio, enhanced cytochrome C release, and higher levels of cleaved caspase-3. Furthermore, bacillomycin D-C16 effectively repressed phosphorylation of the serine–threonine protein kinase Akt at Ser-473 and increased the levels of
the FoxO3a protein. The combination of the PI3K/Akt-inhibitor BEZ235 with bacillomycin D-C16 enhanced the apoptosis of Bgc-823 cells. Together, these findings indicated that bacillomycin D-C16 induces apoptosis through the PI3K/Akt and FoxO3a signaling pathways.
研究领域:
肿瘤学
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分子生物学
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细胞生物学
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药理学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
·
IF 6.165
Jing Lv,Meiqiang Xie,Shufen Zhao,Wensheng Qiu,Shasha Wang,Manming Cao
Hybrid-drugs chemotherapy is now one of the widely adopted treatments for cancer prevention with favorable diagnoses. This work has proposed compostable paclitaxel (PTX) and biotin (BT) PCEC nanomaterials (NMs) for the codelivery and to investigate the drug delivery mechanism's efficacy ( [email protected] ) against gastric cancer cells in vitro and in vivo. The fabricated [email protected] were 27.97 ± 1.87 nm in size and had a less polydispersity index (0.156 ± 0.030). PTX and BT were released slowly from the drug delivery without any burst impact. In addition, dose-responsive cytotoxic effects were observed for [email protected] on SGC-791 cells with a higher mortality ratio than free drugs. According to a cellular uptake investigation, drug-loaded PCECs of polymeric liquid nanoparticles were considered better by cancer cells in vitro. To assess the in vivo antitumor activity, [email protected] were administered intravenously injected to xenografted with SGC-791 cells. Substantial inhibition of tumor development was observed with extended survival time and decreased side effects with [email protected] compared to free drugs (PTX + BT). Furthermore, compared to other therapy classes, [email protected] care resulted in lower H&E and Ki67 expressions and improved TUNEL positive in cancer cells, indicating the chemotherapeutic efficiency of drug delivery system. Overall, the current investigation confirmed that DDS [email protected] could be used to successfully combat gastric cancers in the immediate future.
研究领域:
药学
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纳米技术
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肿瘤学
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药物递送系统
✓ 已验证
产品关联
DOI
高影响因子
Acta Biomaterialia
·
2025
·
IF 9.6
Chunxia Liu,Mengjing Lin,Jing Dai,Binglin Chen,Jiali Wang,Jingyi Li,Xiaoyun Li,Ziyun Jiang,Miao Xiao,Mingliang Tang
Vascular calcification (VC) is a critical pathological hallmark of cardiovascular diseases but current therapeutic options remain inadequate. Nitric oxide (NO) homeostasis plays a vital role in endothelial function and phenotypic transformation of vascular smooth muscle cells (VSMCs), two key pathological processes in VC. In this study, Fe₃O₄@PDA@BNN6 (FPB) nanoparticles were prepared for directional and controllable NO therapy. Magnetic field enriched the nanoparticles to the site of VC and ultrasound triggered the controllable release of NO to regulate the homeostasis of endothelial nitric oxide synthase (eNOS) and inducible nitric oxide synthase (iNOS), further activated sGC-cGMP-PKG signaling pathway. Both in the rat and in vitro VC models, the innovative therapy inhibited osteogenic like transformation of VSMCs, alleviated endothelial inflammatory response, regulated eNOS/iNOS homeostasis, and effectively improved VC. By ensuring optimal NO bioavailability for vascular homeostasis, this magneto-ultrasonically controlled strategy overcomes limitations of conventional NO-based therapies and paves the way for precision NO-mediated interventions in cardiovascular diseases. Statement of Significance Engineering innovation: Dual-modality nanoparticle system for precision NO delivery: Magnetic guidance directs the FPB to calcified lesions, reducing systemic off-target effects. Ultrasound-triggered release of NO to ensure on-demand delivery at VC sites. Mechanistic innovation: Restoring eNOS/iNOS homeostasis as a therapeutic axis: Directional and controllable NO therapy uniquely modulates eNOS/iNOS homeostasis, further activating the sGC-cGMP-PKG signaling pathway.
研究领域:
心血管医学
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纳米医学
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分子治疗
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生物医学工程
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氧化还原生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMEDICINE & PHARMACOTHERAPY
·
2017
·
IF 2.759
Yanyan Zhu,Yameng Jiang,Lei Shi,Linying Du,Xiaodong Xu,Enxia Wang,Yong Sun,Xin Guo,Boyang Zou,Huaxin Wang,Changyuan Wang,Lidan Sun,Yuhong Zhen
7- O -Geranylquercetin (GQ) is a novel O -alkylated derivate of quercetin . In this study, we evaluated its apoptosis induction effects in human gastric cancer cell lines SGC-7901 and MGC-803 and explored the potential molecular mechanisms. The results demonstrated that GQ lowered viability of SGC-7901 and MGC-803 cells in a dose- and time-dependent manner without apparent cytotoxicity to human gastric epithelial cell line GES-1. GQ could induce apoptosis in SGC-7901 and MGC-803cells, and arrest the gastric cancer cells at G2/M phase. Mechanism study showed that GQ triggered generation of reactive oxygen species (ROS), then activated p38 and JNK signaling pathways , subsequently led to mitochondrial impairment by regulating the expression of Bcl-2, Bcl-xl and Bax, and finally promoted the release of cytochrome c and the activation of caspases to induce apoptosis. In addition, Z-VAD-FMK (caspase inhibitor) could reverse GQ-induced apoptosis. SB203580 (p38 inhibitor) and SP600125 (JNK inhibitor) could rescue GQ-induced cell death and attenuate mitochondrial signal pathway activation. Furthermore, NAC (ROS inhibitor) could rescue GQ-induced cell death, reduce ROS generation, decrease the phosphorylation of p38 and JNK, and then attenuate the activation of mitochondrial signal pathway. Taken together, GQ induces caspase-dependent apoptosis in gastric cancer cells through activating ROS-MAPK mediated mitochondrial signal pathway. This study highlights the potential use of GQ as a gastric cancer therapeutic agent.
研究领域:
肿瘤学
·
药理学
·
细胞生物学
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Drug Design Development and Therapy
·
2017
·
IF 2.822
Jingrun Chen,Junjie Liu,Dongxiao Cui,Chaoqun Yan,Liqiang Meng,Liqian Sun,Shurong Ban,Rui Ge,Taigang Liang,Qingshan Li
This study deals with the design and synthesis of a series of novel 4-methoxy-substituted and 5-methyl-substituted (3′S,4′S)-(−)-cis-khellactones. The newly synthesized compounds were characterized by 1H nuclear magnetic resonance (NMR), 13C-NMR, mass spectrometry, and elemental analysis. All the derivatives were subjected to in vitro cytotoxicity screening against HEPG-2 (human liver carcinoma), SGC-7901 (human gastric carcinoma), and LS174T (human colon carcinoma), by using the MTT assay. The results revealed that several of the 4-methoxy-substituted compounds exhibited potent cytotoxicity. Among these, compound 12e showed the highest activity against cancer cells which 50% inhibitory concentration (IC50) values were in the range of 6.1–9.2 μM with low toxicity on normal human hepatocyte. Preliminary investigation of possible mechanisms of action of compound 12e against HEPG-2 cells indicated possible induction of apoptosis, as determined by morphological observations and Annexin V/propidium iodide (PI) double staining, in addition to apparent dissipation of mitochondrial membrane potential (MMP), as measured by 5,5′,6,6′-tetrachloro-1,1′,3,3′-tetraethyl-imidacarbocyanine iodide (JC-1) staining in combination with the activation of caspase-9 and caspase-3 by Western blot analysis. Overall, the data suggest that compound 12e may be a promising potential anti-cancer agent that could act primarily by inducing apoptosis through the mitochondria-mediated intrinsic pathway in human hepatoma cells.
研究领域:
药理学
·
肿瘤学
·
药物化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）