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ObjectiveTo screen out the extended spectrum beta-lactamase （ESBL）-producing Escherichia coli with the strongest biofilm-forming ability through experiments， and discuss the effect of modified Dayuansan （MDYS） combined with imipenem-cilastatin and cilastatin sodium on the biofilm of E. coli. MethodThe paper diffusion and crystal violet staining methods were used to identify 19 clinically isolated strains of drug-resistant E. coli-induced enzymes and the biofilm-forming ability. The induced enzymes and the E. coli with the strongest biofilm-forming ability were screened out. The minimum inhibitory concentration （MIC） value of MDYS and imipenem-cilastatin and cilastatin sodium was determined by 2，3-bis（2-methoxy-4-nitro-5-sulfophenyl）-2H-tetrazolium-5-carboxamide （XTT） assay. The 1/2， 1/4， and 1/8 MIC of the water extract of MDYS， imipenem-cilastatin and cilastatin sodium alone， and MDYS combined with imipenem-cilastatin and cilastatin sodium was determined by methyl thiazolyl tetrazolium （MTT） assay to obtain the optimum concentration of drugs. BioFlux dynamically observed the effect of the optimum combined drug concentration on the number of bacteria in the biofilm and the biofilm formation of E. coli， and observed the distribution of live/dead bacteria with a laser confocal scanning microscope. Finally， the morphological changes in bacteria after drug treatment were observed statically by scanning electron microscopy. ResultE5E7 strain was ESBL enzyme and the E. coli with the strongest biofilm-forming ability. The results of MTT assay showed that the MIC values of the water extracts of imipenem-cilastatin and cilastatin sodium and MDYS were 1 mg·L-1 and 250 g·L-1， respectively. The results of XTT assay showed that compared with the blank group， the 1/2， 1/4， and 1/8 MIC MDYS groups and the combined drug groups significantly decreased the number of bacteria in the biofilm （P<0.01）. The inhibitory effect diminished as the concentration of imipenem-cilastatin and cilastatin sodium decreased. Compared with the imipenem-cilastatin and cilastatin sodium group with the same concentration， the combined drug group improved the inhibitory effect on the number of bacteria in the biofilm （P<0.01）. Compared with the MDYS group with the same concentration， 1/2 MIC imipenem-cilastatin and cilastatin sodium combined with 1/2， 1/4， and 1/8 MIC MDYS， 1/4 MIC imipenem-cilastatin and cilastatin sodium combined with 1/2 and 1/4 MIC MDYS， and 1/8 MIC imipenem-cilastatin and cilastatin sodium combined with 1/2 and 1/4 MIC MDYS decreased the number of bacteria （P<0.05， P<0.01）. The results of BioFlux showed that compared with the blank group， the 1/2 and 1/8 MIC imipenem-cilastatin and cilastatin sodium groups had an insignificant effect on the area of biofilm， whereas the 1/2 and 1/4 MIC MDYS groups significantly decreased the area of biofilm. The results under the scanning electron microscopy showed that as compared with the blank group and the imipenem-cilastatin and cilastatin sodium group， the division cycle was significantly longer under the action of MDYS combined with imipenem-cilastatin and cilastatin sodium. The length of the division cycle in the combined drug group was higher than that in drug alone group. ConclusionIn vitro studies reveal that MDYS combined with commonly-used antibiotics can inhibit the biofilm status of multi-drug resistant E. coli， and MDYS has the effect of enhancing sensitization and inhibiting bacteria with synergistic antibiotics.
ABSTRACT
ObjectiveTo screen out the extended spectrum beta-lactamase （ESBL）-producing Escherichia coli with the strongest biofilm-forming ability through experiments， and discuss the effect of modified Dayuansan （MDYS） combined with imipenem-cilastatin and cilastatin sodium on the biofilm of E. coli. MethodThe paper diffusion and crystal violet staining methods were used to identify 19 clinically isolated strains of drug-resistant E. coli-induced enzymes and the biofilm-forming ability. The induced enzymes and the E. coli with the strongest biofilm-forming ability were screened out. The minimum inhibitory concentration （MIC） value of MDYS and imipenem-cilastatin and cilastatin sodium was determined by 2，3-bis（2-methoxy-4-nitro-5-sulfophenyl）-2H-tetrazolium-5-carboxamide （XTT） assay. The 1/2， 1/4， and 1/8 MIC of the water extract of MDYS， imipenem-cilastatin and cilastatin sodium alone， and MDYS combined with imipenem-cilastatin and cilastatin sodium was determined by methyl thiazolyl tetrazolium （MTT） assay to obtain the optimum concentration of drugs. BioFlux dynamically observed the effect of the optimum combined drug concentration on the number of bacteria in the biofilm and the biofilm formation of E. coli， and observed the distribution of live/dead bacteria with a laser confocal scanning microscope. Finally， the morphological changes in bacteria after drug treatment were observed statically by scanning electron microscopy. ResultE5E7 strain was ESBL enzyme and the E. coli with the strongest biofilm-forming ability. The results of MTT assay showed that the MIC values of the water extracts of imipenem-cilastatin and cilastatin sodium and MDYS were 1 mg·L-1 and 250 g·L-1， respectively. The results of XTT assay showed that compared with the blank group， the 1/2， 1/4， and 1/8 MIC MDYS groups and the combined drug groups significantly decreased the number of bacteria in the biofilm （P<0.01）. The inhibitory effect diminished as the concentration of imipenem-cilastatin and cilastatin sodium decreased. Compared with the imipenem-cilastatin and cilastatin sodium group with the same concentration， the combined drug group improved the inhibitory effect on the number of bacteria in the biofilm （P<0.01）. Compared with the MDYS group with the same concentration， 1/2 MIC imipenem-cilastatin and cilastatin sodium combined with 1/2， 1/4， and 1/8 MIC MDYS， 1/4 MIC imipenem-cilastatin and cilastatin sodium combined with 1/2 and 1/4 MIC MDYS， and 1/8 MIC imipenem-cilastatin and cilastatin sodium combined with 1/2 and 1/4 MIC MDYS decreased the number of bacteria （P<0.05， P<0.01）. The results of BioFlux showed that compared with the blank group， the 1/2 and 1/8 MIC imipenem-cilastatin and cilastatin sodium groups had an insignificant effect on the area of biofilm， whereas the 1/2 and 1/4 MIC MDYS groups significantly decreased the area of biofilm. The results under the scanning electron microscopy showed that as compared with the blank group and the imipenem-cilastatin and cilastatin sodium group， the division cycle was significantly longer under the action of MDYS combined with imipenem-cilastatin and cilastatin sodium. The length of the division cycle in the combined drug group was higher than that in drug alone group. ConclusionIn vitro studies reveal that MDYS combined with commonly-used antibiotics can inhibit the biofilm status of multi-drug resistant E. coli， and MDYS has the effect of enhancing sensitization and inhibiting bacteria with synergistic antibiotics.
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Objective To investigate the clinical efficacy ofHejie Fenxiao Decoction on damp-heat patients with acute kidney injury (AKI).Methods Totally 68 patients were divided into the control group and the treatment group according to the patients’ willings. Both groups were given treatment, such as elimination of the incentives and symptomatic treatment. Besides, patients of the treatment group acceptedHejie Fenxiao Decoction for 30 days. The changes of renal function indexes, such as serum creatinine (SCr), blood urine nitrogen (BUN), uric acid (UA), albumin (ALB) and integral of TCM syndrome, were observed, and recovery ratio and clinical endpoints were compared.Results SCr and eGFR of both group were improved on day 14 (P0.05);clinical endpoints analysis of the two groups showed statistical significance (P<0.05). The difference of integrals of TCM syndrome between the two groups showed statistical significance (P<0.05) on day 14.ConclusionHejie Fenxiao Decoction combined with basic regular Western medicine can better improve the clinical symptom, recover the renal function, and decrease the rate of renal replacement and death of AKI damp-heat patients.
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Objective To study the relieving cough effect ofPuji-Xuanfei-Xiaodu decoction on acute bronchitis.Methods 87 patients with acute bronchitis of exterior cold and interior heat were randomly divided into two groups(44 cases in a therapy group and 43 cases in a control group).Puji-Xuanfei-Xiaodu decoction was given to the patients in the therapy group and acute bronchitis syrup was given to the control group, to observe the influence on symptoms of cough, sputum, fever and headache. The course of treatment was 7 days. Results On the reliving cough aspect, 28 cases (63.6%) showed cure effect and 13 cases (29.5%) effctive, the total effective rate was 93.2% in therapy group with 44 cases; while in control group (43 cases), 15 cases (43.9%) showed cure effect and 23 cases (53.5%) effctive, the total effective rate was 88.4%. The symptoms of cough, phlegm, fever, headache and aversion to wind were significantly decreased in two groups. In therapy group, the numbers of cure effect, remarkable effect and efficacy were 22 (50%) ,11(25%) and 8 (18.2%) cases respectively, the total effective rate was 93.19% while the numbers of cure effect, remarkable effect and efficacy were 14 (32.6%) ,8(18.6%) and 12 (27.9%) cases respectively, the total effective rate was 79.07% in control group. The total effective ratio of two groups had significant difference (P>0.05).ConclusionsPuji-Xuanfei-Xiaodu decoction is effective in relieving cough.
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Acute coronary syndrome(ACS) belongs to “thoracic obstruction” and “heartache” in traditional Chinese medicine.Although many ancient physicians has discussed this disease,while due to the impact of “Yang Wei Yin Xian” in Zhang Zhong-jing's theory,the disease caused little attention by far.In the clinical practice,the author found that most ACS patients belong to heat syndrome.Based on TCM constitution theory,the author put forward the ACS was mainly caused by heat accumulation and blood stasis due to the changes of living environment,lifestyle,and diet,etc.According to traditional Chinese medicine theory,emotional disorder,spicy and hot food can burn body fluid,leading to blood stasis.Long term of blood stasis turns to heat,which further consumes heart blood and aggravates blood stasis.Therefore heat accumulation and blood stasis should be paid attention in the treatment of ACS.
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Pulse-activating injection has the functions of supplementing qi and nourishing yin, and recovering pulse from a collapse state. It is applied in hypotension caused by serious infection or hypovolemia extensively. Pulse-activating injection can be also used to treat hypotension caused by tracheal intubation with good effects. Appropriate application according to state of illness is very important, such as controlling infection and supplementing blood-volume, etc. When applied in cardia insufficiency, vasodilating agent should be used together to regulate dropping rate.
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Objective:To assess the relationship between the characteristic of drug resistance in Acinetobacter baumannii and the syndrome of traditional Chinese medicine(TCM) in intensive care unit(ICU).Methods:Sixty-six strains of Acinetobacter baumannii were isolated from sputum specimens of patients in our ICU from March 2005 to February 2006.The data of the drug sensitivity test in vitro was analyzed.The relation between the syndrome of TCM and drug resistance in Acinetobacter baumannii was probed.Results:The 66 strains of Acinetobacter baumannii were drug resistant to multiple kinds of anti-bacterial drugs(sensitivity rate
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Objective: To study the role of IL-6 in the dental pulp indirect injury by gunshot. Methods: The mandible was wounded by gunshot at (961.18?8.94) m/s in 17 dogs.2 h,6 h,1 d,3 d,7 d after injury molars,caspids,and lateral incisors were sampled respectively for IL-6 detection by immunohistochemical method in dental pulp. Results: The results showed that positive staining of IL-6 was observed predominantly in infiltrating inflammatory cells, vascular endothelial cells and some fibroblasts,IL-6 expression was consistent with the recruitment and activation of inflammatory cells, and with the severity duration of pulpal tissue injury and response. IL-6 level was increased in the dental pulp 6 h～3 d after injury.Conclusion: IL-6 is involved in regulating physiologic responses of dental pulp injuries in maxillofacial trauma by a projectile.