Dual stimuli-responsive polysulfone membranes with interconnected networks by a vapor-liquid induced phase separation strategy.

Dual pH- and thermo-responsive polysulfone (PSf) membranes with three-dimensionally interconnected networks are fabricated by introducing poly(acrylic acid-co-N-isopropylacrylamide) (P(AA-NIPAm)) into the membrane surfaces and pore walls during membrane formation via a vapor-liquid induced phase separation (V-LIPS) process. After introducing the copolymers of P(AA-NIPAm), the fabricated membranes exhibit impressive open network pores on the surfaces, meanwhile their cross-sectional structure turns from classical asymmetric finger-like structure into bi-continuous nanopores throughout the whole thickness of membrane, due to high solution viscosity and low mass transfer rate of VIPS process. Furthermore, pure water permeation tests show that the pure water permeation (Lp) and the molecular weight cutoff (MWCO) of the fabricated PSf/P(AA-NIPAm) membranes increases sharply as the solution pH decreases from 12.5 to 1.5 and the feed temperature increases from 25 to 50 °C, attributing to the increasing pore size. With the decreasing mass ratio of AA to NIPAm, the pH-responsive coefficient decreases, while the temperature- responsive coefficient increases. In particular, for the fabricated membrane with the mass ratio of AA to NIPAm of 3 to 2, Lp changes from ∼16.0 to ∼821.4 L m-2 h-1 bar-1 and MWCO increases from ∼223.1 to ∼1493.2 kDa, as the filtration experiments are operated with feed pH and temperature of 12.5/25 °C and 1.5/50 °C respectively. The results proposed in this study provide a novel mode for design and development dual responsive porous membranes in situ, which will enable good separation of various materials and expand the scope of membrane applications.

Microstructures and performances of pegylated polysulfone membranes from an in situ synthesized solution via vapor induced phase separation approach.

In situ pegylated (PEGylated) microporous membranes have been extensively reported using poly(ethylene glycol) (PEG)-based polymers as blending additives. Alternatively, free standing PEGylated polysulfone (PSf) membranes with excellent hydrophilicity and antifouling ability were directly fabricated from polysulfone/poly(ethylene glycol) methyl ether methacrylate (PSf/PEGMA) solutions after in situ cross-linking polymerization without any treatment via vapor induced phase separation (VIPS) process for the first time. The microstructures and performances of the resulting membranes shifted regularly by adjusting exposure time of the liquid film in humid air. With increasing exposure time, plenty of worm-like networks formed and distributed on membrane surfaces, meanwhile cross-sectional morphology changed from asymmetric finger-like microporous structure to symmetric cellular-like structure, resulting in better mechanical stability. As the exposure time raised from 0 to 5 min, the surface coverage of carboxyl groups increased from ∼1.1 to 4.0 mol%, leading to the decrease in water contact angle from ∼63 to 27° and the increase in water flux from ∼110 to 512 L m-2 h-1. In addition, at prolonged exposure time, increasing hydrophilic PEG chains migrated to membrane surfaced and repelled the adsorption and deposition of protein, resulting in better antifouling ability. The findings of this study offer a facile and high efficient strategy for flexible design and fabrication of the in situ PEGylated membranes with desirable structures and performances in large scale.

Biomolecule-assisted synthesis of highly stable dispersions of water-soluble copper nanoparticles.

Water-soluble and highly stable dispersions of copper nanoparticles were obtained using a biomolecule-assisted synthetic method. Dopamine was utilized as both reducing and capping agent in aqueous medium. The successful formation of DA-stabilized copper particles was demonstrated by ultraviolet-visible spectroscopy (UV-Vis), transmission electron microscopy (TEM), Zeta potential measurement, and Fourier transform infrared spectroscopy (FT-IR). The mechanism of dopamine on the effective reduction and excellent stability of copper nanoparticles was also discussed. This facile biomolecule-assisted technique may provide a useful tool to synthesize other nanoparticles that have potential application in biotechnology.

Randomized controlled study on dysphagia after stroke treated with deep insertion of Chonggu (EX-HN 27) by electroacupuncture / 中国针灸

<p><b>OBJECTIVE</b>To explore the therapeutic effect of dysphagia after stroke treated with different depth of Chonggu (EX-HN 27) by electroacupuncture.</p><p><b>METHODS</b>Two hundreds and eighty-three cases of dysphagia after stroke were randomly divided into Chonggu (EX-HN 27) deep insertion group (99 cases), Chonggu (EX-HN 27) shallow insertion group (94 cases) and traditional acupuncture group (90 cases) based on multi-central randomized control and blinding methods. Besides routine therapy, Chonggu (EX-HN 27) and Lianquan (CV 23) were selected in the Chonggu (EX-HN 27) deep insertion group and the Chonggu (EX-HN 27) shallow insertion group; the needles were inserted for 60-75 mm and 30 mm respectively and the electroacupuncture was applied in both groups; in traditional acupuncture group, Fengchi (GB 20), Yifeng (TE 17), Wangu (GB 12) and Lianquan (CV 23), etc. were selected. The needles were retained for 30 min, twice a day and 30 treatments totally in 3 groups. The clinical therapeutic effects were evaluated by Kubota's Water Drinking Test Scale, Standard Swallowing Function Scale and TCM Scale of Dysphagia After Stroke.</p><p><b>RESULTS</b>The total effective rate was 97.0% (96/99) in the Chonggu (EX-HN 27) deep insertion group, superior to that of 64.9% (61/94) in Chonggu (EX-HN 27) shallow insertion group and 70.0% (63/90) in traditional acupuncture group (both P < 0.05). Compared with the scores before and after treatment, significant differences were presented statistically in score reduction of TCM Scale in Chonggu (EX-HN 27) shallow insertion group (P < 0.01); the scores of Kubota's Water Drinking Test Scale, Standard Swallowing Function Scale and TCM Scale of Dysphagia After Stroke were obviously reduced in Chonggu (EX-HN 27) deep insertion group and traditional acupuncture group (all P < 0.01); compared with the scores between groups after treatment, the reduction of scores in Chonggu (EX-HN 27) deep insertion group was superior to those in Chonggu (EX-HN 27) shallow insertion group and traditional acupuncture group ( P < 0.05, P < 0.01) respectively.</p><p><b>CONCLUSION</b>Puncture at Chonggu (EX-HN 27) can improve the dysfunction of swallowing after stroke; it is safe and effective, and the needle should be inserted deeply.</p>

Observation on therapeutic effect of nuchal acupuncture and abdominal acupuncture for treatment of stroke patients with spastic hemiplegia / 中国针灸

<p><b>OBJECTIVE</b>To probe the effect and mechanism of the nuchal acupuncture and abdominal acupuncture for treatment of stroke patients with spastic hemiplegia.</p><p><b>METHODS</b>Sixty cases were randomly divided into an observation group and a control group, 30 cases in each group. Nuchal acupuncture and abdominal acupuncture treatment was used and Fengfu (GV 16), Fengchi (GB 20), Tianzhu (BL 10), Zhongwan (CV 12) and Guanyuan (CV 4) etc. were selected in observation group, routine acupuncture was applied on Binao (LI 14), Quchi (LI 11), Huantiao (GB 30) and Futu (ST 32) etc. in control group. The scale of Ashworth and score of Fugel-Meyer of the spastic lateral upper and lower limbs and the changes of the EMG F-wave in spastic upper limb of patients in two groups were observed before and after treatment.</p><p><b>RESULTS</b>The Ashworth scale and Fugel-Meyer score of the upper and lower limbs were obviously improved, the amplitude was decreased, the duration was shorten and the threshold of the EMG F-wave of the spastic upper limb was increased (all P < 0.01) in the observation group. The observation group was superior to the control group in Fugel-Meyer score of the upper and lower limbs of the patients the Ashworth scale of the lower limb, and the amplitude, duration and threshold of the EMG F-wave of the spastic upper limb (all P < 0.01). The total effective rate of 90.0% in observation group was superior to that of 50.0% in control group (P < 0.01).</p><p><b>CONCLUSION</b>The nuchal acupuncture and abdominal acupuncture treatment can decrease the muscle tension of the stroke patients with spastic hemiplegia.</p>

Randomized controlled study on effects of the needling method for regulating spleen-stomach on coronary heart disease complicated by type 2 diabetes mellitus complicated / 中国针灸

<p><b>OBJECTIVE</b>To probe into the clinical therapeutic effect of acupuncture on coronary heart disease complicated by type 2 diabetes mellitus (CDM) and the mechanism.</p><p><b>METHODS</b>Using multi-central, randomized, controlled and blind methods, 120 cases of CDM were divided into an observation group and a control group, 60 cases in each group. They were treated by routine therapy for diabetes mellitus, and in the observation group, acupuncture at Quchi (LI 11), Hegu (LI 4), Xuehai (SP 10), Zusanli (ST 36), Yinlingquan (SP 9), Fenglong (ST 40). Diji (SP 8), Sanyinjiao (SP 6), etc. were added with the needling method for regulating spleen-stomach; while in the control group, acupuncture was given at Weiwanxiashu (EX-B 3), Feishu (BL 13), Pishu (BL 20), Shenshu (BL 23), Yanglingquan (GB 34), etc. The treatment was given twice a day in the two groups. Clinical therapeutic effects were assessed according to clinical symptoms and signs, frequency and lasting time of angina pectoris, quantity of taking Glycerol Trinitrate, blood sugar, blood lipids, urinary albumin excretion rate, urinary beta2-microglobulin, urinary monocyte chemotactic protein-1 (MCP-1), ECG, heart color Doppler, etc.</p><p><b>RESULTS</b>The needling method for regulating spleen-stomach not only could improve the symptoms and signs of the patient, but also could improve the degree of ST segment moving down and the function of left artrium relaxation, and had benign regulative effect on glycometabolism, lipids metabolism and urinary albumin level, with significant differences as compared with the control group (P < 0.05 or P < 0.01). The markedly effective rate for improvement of ECG was 50.00% in the observation group and 13.79% in the control group.</p><p><b>CONCLUSION</b>The needling method for regulating spleen-stomach can improve the damage of heart and blood vessels induced by abnormal sugar and lipids, decrease the level of urinary protein, inhibit MCP-1 excessive expression, relieve myocardial load and raise cardiac output in the patient of coronary heart disease complicated by type 2 diabetes mellitus.</p>

Multi-central randomized controlled trials of electroacupunture at Zhigou (TE 6) for treatment of constipation induced by stagnation or deficiency of qi / 中国针灸

<p><b>OBJECTIVE</b>To assess the therapeutic effect and safety of electroacupuncture (EA) at Zhigou (TE 6) on constipation induced by stagnation or deficiency of qi.</p><p><b>METHODS</b>Multi-central randomized controlled trials were adopted and the patients conforming to the criteria for diagnosis, enrolling and excluding were divided into an observation group and a control group according to random number table. The observation group were treated with EA at Zhigou (TE 6) and the control group with EA at non-acupoint for 4 weeks. The cumulative score of clinical symptoms, colon transmission test and various safety indexes were assessed. The following-up was carried out 1 and 3 months after the end of treatment.</p><p><b>RESULTS</b>EA at Zhigou (TE 6) could obviously improve clinical symptoms and colon transmission time, decrease using rate of Kaisailu and cathartics, with an effective rate of 94.4%, which was better than 61.3% in the control group (P < 0.0001).</p><p><b>CONCLUSION</b>EA at Zhigou (TE 6) has a function of regulating qi and relaxing the bowels and it is an effective method for treatment of constipation with safety and no adverse effect.</p>

Randomized and controlled study on needling method of harmonizing spleen-stomach for early intervention of diabetic nephropathies and the mechanism of protecting kidney / 中国针灸

<p><b>OBJECTIVE</b>To probe into clinical therapeutic effect of acupuncture on diabetic nephropathies and the mechanism.</p><p><b>METHODS</b>Using multi-central, randomized and blind methods, 130 cases of diabetic nephropathy were divided into an observation group and a control group, 65 cases in each group. They were treated by routine diabetic therapy, and in the observation group, acupuncture at Quchi (LI 11), Zhigou (TE 6), Hegu (LI 4), Xuehai (SP 10), Zusanli (ST 36), Yinlingquan (SP 9), Fenglong (ST 40), Diji (SP 8), Sanyinjiao (SP 6), Taichong (LR 3), Tianshu (ST 25), Gaohuang (BL 43), Shenshu (BL 23), Zhongwan (CV 12), Zhongji (CV 3) were added with needling method of harmonizing spleen-stomach. While in the control group, acupuncture at Shenshu (BL 23), Taixi (KI 3), Sanyingjiao (SP 6), Yanglingquan (GB 34), Xuanzhong (GB 39), Guanyuan (CV 4), Shousanli (LI 10), Waiguan (TE 5), Yangxi (LI 5), Liangqiu (ST 34), Shangjuxu (ST 37), Neiting (ST 44), Huaroumen (ST 24), Dachangshu (BL 25). The treatment was given twice a day in the two groups. Clinical therapeutic effects were assessed according to clinical symptoms and signs, blood sugar, blood lipids, urinary albumin excretion rate, urinary monocyte chemotactic protein-1 (MCP-1), glomerular filtration rate (GFR), renal blood flow, etc..</p><p><b>RESULTS</b>The needling method of harmonizing spleen-stomach not only could improve symptoms and signs of the patients, and also had benign regulative action on metabolism of blood sugar and lipids, and GFR, renal blood flow and urinary albumin level, with significant or very significant differences as compared with the control group ( P < 0.05 or P < 0.01).</p><p><b>CONCLUSION</b>The needling method of harmonizing spleen-stomach is an effective method for diabetic nephropathies, which can improve progressive renal lesion induced by abnormal metabolism of blood sugar and lipids, improve renal blood flow and GFR, decrease urinary albumin secretion, inhibit over expression of MCP-1, protect glomerulus and renal tubules, so as to improve renal function and delay renal lesion.</p>

Controlled study on the needling method for regulating the spleen and stomach for treatment of diabetic retinopathy / 中国针灸

<p><b>OBJECTIVE</b>To probe clinical therapeutic effect of acupuncture on diabetic retinopathy and the mechanism.</p><p><b>METHODS</b>One hundred and twenty cases of diabetic retinopathy were randomly divided into an observed group and a control group, 60 cases in each group. On the basis of routine diabetic treatment, the observation group were treated with the acupoints for regulating the spleen and stomach, and the control group with the acupoints around eye mainly. Clinical therapeutic effect was evaluated by eye fundus condition, blood glucose, blood lipids, nitric oxide (NO) and endothelin (ET) levels.</p><p><b>RESULTS</b>The needling method for regulating the spleen and stomach not only can improve the eye fundus condition, but also has benign regulative action on metabolism of blood glucose and blood lipids, and NO and ET levels, with significant differences as compared with those in the control group (P < 0.05, P < 0.01).</p><p><b>CONCLUSION</b>The needling method for regulating the spleen and stomach is an effective therapy for diabetic retinopathy, and the mechanism is possibly related with the regulation of levels of vascular active substances, NO and ET.</p>

Effects of {2-[(3-carboxy-1-oxoprogy1)amino]-2-deoxy-D-glucose} on human hepatocellular carcinoma cell line.

AIM: To study the effects of {2-[(3-carboxy-1-oxoprogy1)amino]-2-deoxy-D-glucose (COPADG) on cultured human hepatocellular carcinoma cells (HepG2). METHODS: HepG2 cells were cultured in RPMI-1640 medium. Cell proliferation was determined by MTT assay. Apoptosis was determined by fluorescence microscopy, transmission electron microscopy, agarose gel electrophoresis of DNA fragmentation, and flow cytometry. RESULTS: At the concentration ranging between 1-30 micromol/L, COPADG potently inhibited the growth and induced apoptosis of HepG2 cells. CONCLUSION: COPADG could effectively induce apoptosis in human hepatocellular carcinoma cells. More investigations are warranted for the potential use of this compound as a new agent for the non-surgical management of human hepatocellular carcinoma.

Clinical observation on acupuncture for treatment of bronchial asthma at acute stage / 中国针灸

<p><b>OBJECTIVE</b>To observe effect of acupuncture on asthma at acute stage.</p><p><b>METHODS</b>Ninety cases of asthma at acute stage were randomly divided into an observation group of 60 cases and a control group of 30 cases. Clinical therapeutic effect and the mechanisms were studied from symptoms and signs, pulmonary function and serum interleukin -4 (IL-4), gamma-interferon (INF-gamma).</p><p><b>RESULTS</b>The pulmonary function was improved, the vital capacity was increased and attack of asthma was reduced in both the observation group and the control group, but the observation group was better than the control group in the pulmonary function improving degree (P < 0.05).</p><p><b>CONCLUSION</b>Acupuncture can strengthen the relieving action of medicine on asthma and it is one of effective methods for bronchial asthma.</p>

Effect of 2-(3-carboxy-1-oxopropyl) amino-2-deoxy-D-glucose on human esophageal cancer cell line.

AIM: To determine whether 2-(3-carboxy-1-oxopropy1) amino-2-deoxy-D-glucose (COPADG), a derivative of D-amino-glucose, inhibited the growth of human esophageal cancer cell line Eca-109. METHODS: Effects of COPADG on Eca-109 cells cultured in RPMI 1640 medium were examined by a tetrazolium-based colorimetric assay (MTT assay). RESULTS: COPADG inhibited the growth of Eca-109 cells in a dose- and time-dependent manner; the maximum inhibition rate was 83.75%. CONCLUSION: COPADG can directly inhibit the proliferation of Eca-109 cells, which may serve as the experimental evidence for development of new drugs for esophageal cancer therapy.