Silver Nanoparticle-Loaded Titanium-Based Metal-Organic Framework for Promoting Antibacterial Performance by Synergistic Chemical-Photodynamic Therapy.

The abuse of antibiotics leads to an increasing emergence of drug-resistant bacteria, which not only causes a waste of medical resources but also seriously endangers people's health and life safety. Therefore, it is highly desirable to develop an efficient antibacterial strategy to reduce the reliance on traditional antibiotics. Antibacterial photodynamic therapy (aPDT) is regarded as an intriguing antimicrobial method that is less likely to generate drug resistance, but its efficiency still needs to be further improved. Herein, a robust titanium-based metal-organic framework ACM-1 was adopted to support Ag nanoparticles (NPs) to obtain Ag NPs@ACM-1 for boosting antibacterial efficiency via synergistic chemical-photodynamic therapy. Apart from the intrinsic antibacterial nature, Ag NPs largely boost ROS production and thus improve aPDT efficacy. As a consequence, Ag NPs@ACM-1 shows excellent antibacterial activity under visible light illumination, and its minimum bactericidal concentrations (MBCs) against E. coli, S. aureus, and MRSA are as low as 39.1, 39.1, and 62.5 µg mL-1, respectively. Moreover, to expand the practicability of Ag NPs@ACM-1, two (a dense and a loose) Ag NPs@ACM-1 films were readily fabricated by simply dispersing Ag NPs@ACM-1 into heated aqueous solutions of edible agar and sequentially cooling through heating or freeze-drying, respectively. Notably, these two films are mechanically flexible and exhibit excellent antibacterial activities, and their antimicrobial performances can be well retained in their recyclable and remade films. As agar is nontoxic, degradable, inexpensive, and ecosustainable, the dense and loose Ag NPs@ACM-1 films are potent to serve as recyclable and degradable antibacterial plastics and antibacterial dressings, respectively.

Robust Mesoporous Functional Hydrogen-Bonded Organic Framework for Hypochlorite Detection.

Although tremendous progress has been achieved in the field of hydrogen-bonded organic frameworks (HOFs), the low stability, small/none pores, and difficult functionality severely obstruct their development. Herein, a novel robust mesoporous HOF (HOF-FAFU-1) decorated with a high density of free hydroxy moieties has been designed and readily synthesized in the de novo synthesis. In HOF-FAFU-1, the planar building blocks are connected to each other by typical intermolecular carboxylate dimers to form two-dimensional (2D) layers with sql topology, which are further connected to their adjacent layers by face-to-face π-π interactions to obtain a three-dimensional (3D) open mesoporous framework. Owing to the high density of intermolecular hydrogen bonding and strong π-π interactions, HOF-FAFU-1 is very stable, allowing it to retain its structure in aqueous solutions with a pH range of 1-9. Benefiting from the decorated hydroxy moieties, HOF-FAFU-1 was exploited as a fluorescent sensor for hypochlorite detection in water media by a turn-off mode, which cannot be realized by its nonhydroxy groups anchoring counterpart (HOF-TCBP). The proposed sensing system is highly efficient, validated by a very broad linear range (0-0.45 mM), fast response (15 s), and small limit of detection (LOD) (1.32 µM). The fluorescent quenching of HOF-FAFU-1 toward hypochlorite was also investigated, mainly being ascribed to the transformation of building blocks from the fluorescent reduced state to the nonfluorescent oxidative state. This work not only demonstrates that HOFs integrated with high stability and large pores as well as high density of functional groups can be simultaneously realized by judicious design of building blocks but also conceptually elucidates that such HOFs can effectively extend the application fields of HOFs.

Synthesis and Anticancer Activity of 3-(Substituted Aroyl)-4-(3,4,5-trimethoxyphenyl)-1H-pyrrole Derivatives.

A series of 3-(substituted aroyl)-4-(3,4,5-trimethoxyphenyl)-1H-pyrrole derivatives were synthesized and determined for their anticancer activity against eleven cancer cell lines and two normal tissue cell lines using MTT assay. Among the synthesized compounds, compound 3f was the most potent compound against A375, CT-26, HeLa, MGC80-3, NCI-H460 and SGC-7901 cells (IC50  = 8.2 - 31.7 µm); 3g, 3n and 3a were the most potent compounds against CHO (IC50  = 8.2 µm), HCT-15 (IC50  = 21 µm) and MCF-7 cells (IC50  = 18.7 µm), respectively. Importantly, all the target compounds showed no cytotoxicity towards the normal tissue cell (IC50  > 100 µm). Thus, these compounds with the potent anticancer activity and low toxicity have potential for the development of new anticancer chemotherapy agents.

[Clinical analysis of patients with stage IV ( colorectal cancer after palliative resection of primary tumor].

OBJECTIVE: To investigate the independent predictors of postoperative mortality, morbidity, and long-term survival in patients with stage IV ( colorectal cancer. METHODS: Clinical data of 189 patients with stage IV( colorectal cancer undergoing palliative resection of primary tumor in the presence of unresectable synchronous metastases were analyzed retrospectively. RESULTS: Eighty-six (45.5%)patients developed postoperative complications. Preoperative predictors of medical complications included age(≥65, P=0.039) and emergency operations (P=0.001). Preoperative predictors of surgical complications included advanced local disease (T4, P=0.022) and lymph node spread (N2, P=0.009). Seventeen (9.0%) patients died in the postoperative period. Mortality was independently associated with age(P=0.013), peritoneal dissemination(P=0.010), emergency operations(P=0.001) and medical complications(P=0.008). The survival rates at 1-, 2-, and 3- year of 172 patients admitted in survival analysis were 41.2%, 22.7% and 7.7% respectively. Independent factors associated with poor overall survival included lymph node spread(N2, P=0.015) and poor tumor differentiation(P=0.038). CONCLUSIONS: Emergency operations should be avoid when palliative resection of primary tumor is considered for stage IV( colorectal cancer patients, especially for elderly patients and those with peritoneal dissemination. The significance of palliative resection is limited for stage IV ( colorectal cancer patients with lymph node spread and poor tumor differentiation.

Clinical observation on treatment of post-craniocerebral traumatic mental disorder by integrative medicine.

OBJECTIVE: To observe the clinical efficacy of integrative medical therapy in treating post-craniocerebral traumatic mental disorder (PCT-MD). METHODS: Sixty patients with confirmed diagnosis of PCT-MD were randomly assigned to the treated group and the control group equally. All were treated by conventional comprehensive Western medicine, but to patients in the treated group, modified Xufu Zhuyu Decoction (XFZY) was additionally given and the therapeutic course for both groups was 20 days. Changes in mental symptoms were observed and recorded on the 10th and 20th day and clinical efficacy as well as cranial CT image was estimated after termination of the treatment. RESULTS: The clinical effective rate in the treated group and the control group was 96.67% and 83.30% respectively. Comparison between them showed significant difference (P<0.05). Significant differences were also shown in the comparisons between the two groups in improving mental symptoms, either on the 10th or on the 20th day (P<0.05 and P<0.01 respectively), and in post-treatment cranial CT image (P<0.05). CONCLUSION: Better efficacy could be obtained by integrative medical therapy in treating PCT-MD.

[Study on the function of decoction for invigorating the kidney and improving blood circulation to thrombosis on rabbit blood stasis model].

OBJECTIVE: To evaluate the effect of decoction for invigorating the kidney and improving blood circulation to thrombosis and pathology on rabbit blood stasis model. METHOD: Thirty rabbits were ramdomly divided into normal group, model group, high dose group, low dose group and Xue Shuan Ning group. Tissue-type plasminogen activator (t-PA), plasminogen activator inhibitor (PAI), fibrinogen (Fbg) and D-dimer (DD) were investigated after those rabbits had been treated. One rot was solected randomly from each group to observe pathological changes. RESULT: There were significant differences in t-PA, PAI, Fbg and DD between normal group and other groups is very obvious (P < 0.01) . Between groups of high dose low dose Xue Shuan Ning and model, the statistical differeces were significant, as well as between groups of high dose, low dose and Xue Shuan Ning groups (P < 0.05). However, there was no statistical difference between high dose group and high dose group (P > 0.05). The pathological changes in model group were most serious, those in Xue Shuan Ning were less serious. There were slight pathological changes in high dose group and low dose group. CONCLUSION: Models ware made successfully. High dose group and low dose group have stronger effect on thrombosis than Xue Shuan Ning group.

[Study rat nephrotoxicity of Longdan Xiegan Tang].

OBJECTIVE: To investigate the nephrotoxocity of Longdan Xiegan Tang in rats, and to test its safety. METHOD: Sprague-Dauley rats were given Longdan Xiegan Tang 4.5 mL x (100 mg)(-1) Bid for thirty days, and the control group was given NS. MTP, BUN, Cr, MDA, MTP/Ucr and SOD were measured on 1st, 2nd, 3rd, 4th week. The kidney tissues were viewed with light microscopy and electron microscope. RESULT: MTP and MTP/Ucr were obviously higher than controls ( P < 0.01), and the other index had no difference (P > 0.05). No remarkable structural change could been seen with light microscopy, but with electron microscope we could find that the basal membranes were thickened and some of foot process were infused. CONCLUSION: Longdan Xiegan Tang will result in injury of kidney function.

[Study on function of decoction for invigorating the kidney and improving blood circulation on rabbits blood stasis model].

OBJECTIVE: To evaluate the effect of decoction for invigorating the kidney and improving blood circulation to thrombosis on rabbits blood stasis model. METHOD: Thirty rabbits were randomly divided into normal group, model group, heavy dose group, slight dose group and xue shuan ning group. Tissue-type plasminogen activator (t-PA), plasminogen activator inhibitor (PAI), fibrinogen (Fbg) and D-dimer (DD) were investigated after those rabbits had been treated. One was selected randomly from each group to observe pathological changes. RESULT: There was significant difference in t-PA, PAI, Fbg and DD between normal group and other groups (P < 0.01). Among groups of heavy dose, slight dose, xue shuan ning and model, the statistical differences were significant, as well as among groups of heavy dose, slight dose and xue shuan ning (P < 0.05). However, there was no statistical difference between heavy dose group and slight dose group (P > 0.05). The pathological changes in model group were most serious, and those in xue shuan ning were less serious. There were slight pathological change in heavy dose group and light dose group. CONCLUSION: Models were made successfully. Heavy dose group and slight dose group have stronger effect on thrombosis than xue shuan ning group.

[The effect of huanglian jiedu tang on Alzheimer's disease and its influence on cytokines].

OBJECTIVE: To investigate the effect of huanglian jiedu tang on Alzheimer' s disease, and its influence on cytokines. METHOD: AD rats models were made by A beta injection, and then water-maze tests were made to investigate the study and memory ability. TNF-alpha, INF-gamma and IL-2 were examined by ELISA. After treatment with huanglian jiedu tang, the rats were evaluated again. RESULT: After A beta injection, the study and memory ability of the rats was decreased. By the treatment with huanglian jiedu tang, it was improved (P < 0.01); TNF-alpha, INF-gamma and IL-2 levels of AD rats were higher than those in control group (P < 0.01); after treatment the levels came down (P < 0.01). CONCLUSION: Huanglian jiedu tang can improve the study and memory ability of AD rats by changing their immune state.

[The study of yi-shen-huo-xue fang's effects on expression of GMP-140 and cleaning out the oxygenic free radicle on rabbits blood stasis model].

OBJECTIVE: To evaluate the effects of Yi-Shen-Huo-Xue Fang on expression of GMP-140 and cleaning out the oxygenic free radicle on rabbits blood stasis model. METHOD: Thirty rabbits were divided randomly into five groups as the normal group, model group, large dose of "Yi-Shen-Huo-Xue Fang" group, small dose of "Yi-Shen-Huo-Xue Fang" group and "Xue-Shuan-Xin-Mai-Ning" group. After being treated respectively, granule membrane protein 140(GMP-140), erythrocyte sueroxide dismutase (E-SOD), erythrocyte lipid peroxide(E-LPO), plasma lipid peroxide(P-LPO) were checked up. RESULT: The GMP-140, E-SOD, E-LPO, P-LPO in normal control were compared with those in model groups, With the difference(P < 0.01), model control group was compared with large dose group and small dose group (P < 0.01), with "Xue-Shuan-Xin-Mai-Ning" group(P < 0.05), large dose group was compared with "Xue-Shuan-Xin-Mai-Ning" group(P < 0.05), and large dose group were compared with small dose group (P > 0.05). CONCLUSION: The model was made successfully. Large dose group, small dose group and "xue-shuan-xin-mai-ning" group can inhibit expression of GMP-140, enhence SOD activity and decrease LPO content on blood stasis rabbit model. Large dose group and small dose group have stronger effect than "xue-shuan-xin-mai-ning" group.