排序方式： 共有66条查询结果，搜索用时 15 毫秒
41.
Chih-Hsin Wang Juin-Hong Cherng Chuan-Chieh Liu Tong-Jing Fang Zhi-Jie Hong Shu-Jen Chang Gang-Yi Fan Sheng-Der Hsu 《International journal of molecular sciences》2021,22(13)
Chitosan, a polysaccharide derived from chitin, has excellent wound healing properties, including intrinsic antimicrobial and hemostatic activities. This study investigated the effectiveness of chitosan dressing and compared it with that of regular gauze dressing in controlling clinically surgical bleeding wounds and profiled the community structure of the microbiota affected by these treatments. The dressings were evaluated based on biocompatibility, blood coagulation factors in rat, as well as antimicrobial and procoagulant activities, and the microbial phylogenetic profile in patients with abdominal surgical wounds. The chitosan dressing exhibited a uniformly fibrous morphology with a large surface area and good biocompatibility. Compared to regular gauze dressing, the chitosan dressing accelerated platelet aggregation, indicated by the lower ratio of prothrombin time and activated partial thromboplastin time, and had outstanding blood absorption ability. Adenosine triphosphate assay results revealed that the chitosan dressing inhibited bacterial growth up to 8 d post-surgery. Moreover, 16S rRNA-based sequencing revealed that the chitosan dressing effectively protected the wound from microbial infection and promoted the growth of probiotic microbes, thereby improving skin immunity and promoting wound healing. Our findings suggest that chitosan dressing is an effective antimicrobial and procoagulant and promotes wound repair by providing a suitable environment for beneficial microbiota. 相似文献
42.
建立妇科止血灵胶囊高效液相色谱法测定芍药苷的方法。色谱柱：DiamonsilCl8（4．6mm×250mm,5μm）。流动相：乙腈-0．1％磷酸溶液（14：86）。流速：1．0mL·min-1。检测波长：230nm。柱温：35℃。进样量：10μg。芍药苷在12．6-252．0μg／mL范围内呈良好线性关系,r=0．9997。平均加样回收率为98．37％,RSD=1．34％（n=5）。所建立的方法简便准确、灵敏度高,可作为妇科止血灵胶囊的质量控制方法。 相似文献
43.
目的比较膨胀海绵和碘仿纱条在宫颈冷刀锥切术后填塞止血的效果。方法将120例宫颈癌前病变患者按随机数字表分成2组：治疗组（65例）采用膨胀海绵进行宫颈填塞止血,对照组（55例）采用进行宫颈填塞止血;观察2组患者止血效果及不适情况。结果术后72 h阴道流血量正常的患者,治疗组多于对照组（P〈0.05）;术后阴道流血时间比较,治疗组少于对照组（P〈0.05）;术后患者重度不适发生率,治疗组少于对照组（P〈0.05）。结论膨胀海绵用于宫颈冷刀锥切术后止血效果好,填塞后舒适度好,是一种较碘仿纱条更好的填塞止血材料。 相似文献
44.
采用改进的溶胶-凝胶工艺合成了具有纳米介孔结构的硅基干凝胶, 并对其止血性能进行了研究. 通过X 射线衍射(XRD)、红外光谱(FTIR)、透射电镜(TEM)和N2等温吸附-脱附分析, 考察了合成硅基干凝胶的相态、结构、形貌、比表面积和介孔特征. 分别采用体外部分凝血活酶时间(APTT)和凝血酶原时间(PT)研究了硅基干凝胶及其加入量对内源性和外源性凝血系统的影响. 以传统止血剂云南白药为对比, 通过兔耳缘静脉止血实验评价了合成硅基干凝胶的止血性能. 结果表明: 经600℃煅烧可得到比表面积901.17m2/g、平均孔径3.255nm的非晶态硅基干凝胶; 合成的硅基干凝胶对内、外源性凝血因子活性均有明显的促进作用; 硅基干凝胶对兔耳缘静脉止血效果良好, 且比云南白药更显著. 相似文献
45.
Liu J Wang Y Yang Y Jiang X Zhao M Wang W Wu G Wu J Zheng M Peng S 《ChemMedChem》2011,6(12):2312-2322
Antifibrinolytic agents are required during complex surgeries to decrease bleeding; their pro-thrombotic potency and efficacy in causing hemostasis has attracted much attention. To discover new inhibitors of urokinase with high selectivity for antifibrinolytic effects over pro-thrombotic effects, the 12-position of (5aS,12S,14aS)- and (5aS,12R,14aS)-5,14-dioxo-1,2,3,5,5a,6,11, 12,14,14a-decahydro-5H,14H-pyrolo[1,2:4,5]pyrazino[1,2:1,6]pyrido[3,4-b]indoles were modified with L-Ala, L-Asp, L-Phe, L-Trp, L-Lys, L-Ser, Gly, and L-Leu to provide 16 (5aS,12S,14aS) and (5aS,12R,14aS) derivatives. In a murine bleeding model, the (5aS,12S,14aS) derivatives containing L-Ala, L-Asp, L-Phe, and L-Trp induced blood coagulation for the treated mice; they also stimulated thrombus formation in a rat thrombosis model, but the other derivatives inhibited thrombosis. The most potent compound, the L-Asp derivative, showed a good therapeutic window: the minimum effective dose for coagulation was <1 nmol kg(-1), whereas at 10 nmol kg(-1), no pro-thrombotic effect was observed. This type of coagulation action was correlated with a mechanism of urokinase inhibition, and these results could lead to the discovery of novel urokinase inhibitors. 相似文献
46.
Wen Yang Xinyi Kang Xu Gao Yan Zhuang Caixai Fan He Shen Yanyan Chen Jianwu Dai 《Advanced functional materials》2023,33(6):2211340
Bioadhesives have been used in clinics among the most prospective alternatives to sutures and staples for wound sealing and repairing; however, they generally have inadequate adhesion to wet surfaces, improper mechanical strength, poor hemostasis, and cytotoxicity. To address these challenges, a robust wet tissue adhesive based on collagen and starch materials (CoSt) is designed in this study. CoSt hydrogels integrate the feature of drainage, molecular penetration and strengthen cross-linking similar to mussel, ivy, and oyster glues, which remove interfacial water quickly, reinforce tough dissipation and involve multiple reversible dynamic interactions. Therefore, they form strong adhesion and sutureless sealing of injured tissues, accompanying actuate robust biointerfaces in direct contact with tissue liquids or blood, resolving the crucial impediments with sutures and commercially accessible adhesives. The novel bioadhesive shows repeatable strong wet tissue adhesiveness (62 ± 4.8 KPa), high sealing performance (153.2 ± 35.1 mmHg), fast self-healing ability, excellent injectability, and shape adaptability. For different hemostatic needs in rat models of tail amputation, skin incision, severe liver, abdominal aorta, and transected nerve injuries, the CoSt hydrogel shows better hemostatic efficiency than fibrin glue because of the coordinate efficacy of tough wound sealing property, outstanding red blood cell arresting capability, and the activation of hemostatic barrier membrane. Moreover, in vivo investigation of the skin injury repair of the rat model validate that CoSt hydrogels accelerate wound healing and functional recovery via skin damage/defects. Tough wet adhesion, quick hemostasis, distinguished biocompatibility, suitability to match irregular-shaped target sites, and good wound healing promotion of the CoSt hydrogel makes it a prospective bioadhesive for various biomedical applications. 相似文献
47.
Peng Chang;Kai Guo;Shijie Li;Hongtao Wang;Mingqiang Tang; 《Small (Weinheim an der Bergstrasse, Germany)》2024,20(11):2208001
Current fish collagen hemostasis for wound healing products is commonly obtained by electrospinning or artificial cross-linking fish collagen fibers which lacks mechanical properties, and biofunctions. Here, a new bio-active fish skin scaffold (FSS) is shown using in situ cross-linked scaleless freshwater fish skin adding adipose-derived stem cells (ASCs)-produced exosomes for hemostasis and wound healing. The structure, pore size, and the thickness of FSS is studied by swelling test, Fourier-transform infrared (FT-IR) spectra, scanning electron microscope (SEM) images, and histological analysis. The biofunctions of the FSS are also tested in vitro and in vivo. FSS keeps two functional layers: The dermis layer collagen forms a sponge like structure after swelling and in situ cross-linking treatments. The pore size of the FSS is ≈152 ± 23.54 µm, which is suitable for cells growing, angiogenesis and ASCs exosomes accelerate wound healing. The fat-rich epidermis layer can keep the wound moisty and clean before completely healed. In vitro and in vivo experimental results indicate that FSS+Exosomes enhances rat skin cavity wound healing. In situ sodium chloride cross-linked FSS+Exosomes provides a new strategy as functional hemostatic dressing scaffold for wound healing. 相似文献
48.
Chunyan Cui Chuanchuan Fan Yuanhao Wu Meng Xiao Tengling Wu Dongfei Zhang Xinyu Chen Bo Liu Ziyang Xu Bo Qu Wenguang Liu 《Advanced materials (Deerfield Beach, Fla.)》2019,31(49)
Despite recent advance in bioinspired adhesives, achieving strong adhesion and sealing hemostasis in aqueous and blood environments is challenging. A hyperbranched polymer (HBP) with a hydrophobic backbone and hydrophilic adhesive catechol side branches is designed and synthesized based on Michael addition reaction of multi‐vinyl monomers with dopamine. It is demonstrated that upon contacting water, the hydrophobic chains self‐aggregate to form coacervates quickly, displacing water molecules on the adherent surface to trigger increased exposure of catechol groups and thus rapidly strong adhesion to diverse materials from low surface energy to high energy in various environments, such as deionized water, sea water, PBS, and a wide range of pH solutions (pH = 3 to 11) without use of any oxidant. Also, this HBP adhesive (HBPA) exhibits a robust adhesion to fractured bone, precluding the problem of mismatched surface energy and mechanical properties. The HBPA's adhesion is repeatable in a wet condition. Intriguingly, the HBPA is capable of gluing dissimilar materials with distinct properties. Importantly, introducing long alkylamine into this modular hyperbranched architecture contributes to formation of an injectable hemostatic sealant that can rapidly stop visceral bleeding, especially hemorrhage from deep wound. 相似文献
49.
Patricia A. Lozano Ahmed B. Alarabi Sarah E. Garcia Erica T. Boakye Hendreta T. Kingbong Elie Naddour Daniel Villalobos-García Precious Badejo Medhat S. El-Halawany Fadi T. Khasawneh Fatima Z. Alshbool 《International journal of molecular sciences》2022,23(5)
While cardiovascular disease (CVD) is the leading cause of death, major depressive disorder (MDD) is the primary cause of disability, affecting more than 300 million people worldwide. Interestingly, there is evidence that CVD is more prevalent in people with MDD. It is well established that neurotransmitters, namely serotonin and norepinephrine, are involved in the biochemical mechanisms of MDD, and consequently, drugs targeting serotonin-norepinephrine reuptake, such as duloxetine, are commonly prescribed for MDD. In this connection, serotonin and norepinephrine are also known to play critical roles in primary hemostasis. Based on these considerations, we investigated if duloxetine can be repurposed as an antiplatelet medication. Our results-using human and/or mouse platelets show that duloxetine dose-dependently inhibited agonist-induced platelet aggregation, compared to the vehicle control. Furthermore, it also blocked agonist-induced dense and α-granule secretion, integrin αIIbβ3 activation, phosphatidylserine expression, and clot retraction. Moreover duloxetine-treated mice had a significantly prolonged occlusion time. Finally, duloxetine was also found to impair hemostasis. Collectively, our data indicate that the antidepressant duloxetine, which is a serotonin-norepinephrine antagonist, exerts antiplatelet and thromboprotective effects and inhibits hemostasis. Consequently, duloxetine, or a rationally designed derivative, presents potential benefits in the context of CVD, including that associated with MDD. 相似文献
50.