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antimicrobial chemotherapy

Azeem Ullah, Yuxiang Zhang, Zafar Iqbal, Yaxin Zhang, Dong Wang, Jincan Chen, Ping Hu, Zhuo Chen, Mingdong Huang
Photodynamic antimicrobial chemotherapy (PACT) is considered a promising alternative to conventional antibiotic approach. We have previously developed a novel PS containing five lysine amino acids, pentalysine-β-carbonylphthalocyanine Zinc (ZnPc(Lys)5 ), which in the presence of light, is highly toxic against a range of bacterial strains, including hospital isolated, drug resistant Acinetobacter baumannii. Here, we study the effect of light fluence of the two light sources on the PACT potency of ZnPc(Lys)5 ...
March 1, 2018: Biomedical Optics Express
Sayeed Mukhtar, Meshari A Alsharif, Mohammed I Alahmdi, Humaira Parveen, Asad U Khan
The synthesis of spiro-thiazolidin-4-one and thioether derivatives of substituted E-3-benzylidene flavanones is reported for the first time. All new compounds were characterized by different spectroscopic techniques and elemental analyses. The in vitro anticancer activities were assessed against the full NCI 60 cell line panel representing nine types of human cancers, at 10-fold dilutions at five different concentrations (0.01, 0.1, 1, 10, and 100 μM. Compound 2a gave noteworthy results in the case of colon (HT29), CNS (SNB-75), melanoma (LOX-IMVI), and renal (ACNH) cells, where the reduction in growth was found at 54, 54, 70, and 77%, respectively, at 10-4  M concentration...
March 12, 2018: Archiv der Pharmazie
Yukihiro Kaneko, Ken-Ichi Oinuma, Tsuneko Terachi, Yasuaki Arimura, Mamiko Niki, Koichi Yamada, Hiroshi Kakeya, Tetsu Mizutani
A 53-year-old woman was hospitalized due to septic shock after developing pneumococcal pneumonia after undergoing esophageal cancer surgery. Her transverse colon became perforated after receiving antimicrobial chemotherapy; therefore, emergency subtotal colectomy was performed. Fungi detected in both her colon tissue and a drainage sample indicated intestinal mucormycosis. Early intensive treatment with high-dose liposomal amphotericin B was successful, and she was subsequently discharged from the hospital...
March 9, 2018: Internal Medicine
Martin S Bojer, Søren Lindemose, Martin Vestergaard, Hanne Ingmer
Incomplete killing of bacterial pathogens by antibiotics is an underlying cause of treatment failure and accompanying complications. Among those avoiding chemotherapy are persisters being individual cells in a population that for extended periods of time survive high antibiotic concentrations proposedly by being in a quiescent state refractory to antibiotic killing. While investigating the human pathogen Staphylococcus aureus and the influence of growth phase on persister formation, we noted that spent supernatants of stationary phase cultures of S...
2018: Frontiers in Microbiology
Peter M Hawkey, Roderic E Warren, David M Livermore, Cliodna A M McNulty, David A Enoch, Jonathan A Otter, A Peter R Wilson
The Working Party makes more than 100 tabulated recommendations in antimicrobial prescribing for the treatment of infections caused by multidrug-resistant (MDR) Gram-negative bacteria (GNB) and suggest further research, and algorithms for hospital and community antimicrobial usage in urinary infection. The international definition of MDR is complex, unsatisfactory and hinders the setting and monitoring of improvement programmes. We give a new definition of multiresistance. The background information on the mechanisms, global spread and UK prevalence of antibiotic prescribing and resistance has been systematically reviewed...
March 1, 2018: Journal of Antimicrobial Chemotherapy
Li-Jie Xia, Yan-Ling Wu, Ji Ma, Fu-Chun Zhang
The primary objective of the treatment of malignant ascites in advanced stages is to alleviate symptoms using procedures such as diuresis, paracentesis of subretinal fluid and vena cava anastomosis. The effectiveness of systemic or intraperitoneal chemotherapy treatment is limited, and more efficacious therapies are required. The authors of the present study demonstrated that an antimicrobial peptide, cecropinXJ, isolated from the larvae of Bombyx mori, selectively inhibits the proliferation of gastric cancer cells...
March 7, 2018: Molecular Medicine Reports
Fu Hua, Chang-Hua Li, Xiao-Gang Chen, Xiao-Ping Liu
Ovarian cancer is the main cause of gynecological cancer‑associated mortality around the world. Despite initial responses to chemotherapy, frequent relapse occurs. Daidzein is an important flavonoid and has been shown to exhibit a diversity of pharmacological properties, including antimicrobial and anticancer activities. However, information on the anticancer activity of daidzein against ovarian cancer remains limited. Therefore, the present study evaluated the anticancer activity of daidzein against a panel of human ovarian cancer cell lines and one normal ovarian cell line (Moody)...
March 5, 2018: International Journal of Molecular Medicine
Fulvio Pinelli, Elena Cecero, Dario Degl'Innocenti, Valentina Selmi, Rosa Giua, Gianluca Villa, Cosimo Chelazzi, Stefano Romagnoli, Mauro Pittiruti
Totally implantable venous access devices, or ports, are essential in the therapeutic management of patients who require long-term intermittent intravenous therapy. Totally implantable venous access devices guarantee safe infusion of chemotherapy, blood transfusion, parenteral nutrition, as well as repeated blood samples. Minimizing the need for frequent vascular access, totally implantable venous access devices also improve the patient's quality of life. Nonetheless, totally implantable venous access devices are not free from complications...
March 1, 2018: Journal of Vascular Access
Pouriya Faraj Tabrizi, Sara Wennige, Mark Berneburg, Tim Maisch
Photodynamic antimicrobial chemotherapy (PACT) is a multi-target method to inactivate pathogenic microorganisms by exciting a photosensitizer (PS) with visible light of appropriate wavelength in the presence of molecular oxygen (3 O2 ). There are two major pathways by which reactive oxygen species (ROS) are produced. In type I (TI )-reactions, radicals such as superoxide (O2 ˙- ) and hydroxyl radicals (˙OH) are generated by electron transfer. In type II (TII )-reactions, highly reactive singlet oxygen (1 O2 ) is produced by direct energy transfer...
February 28, 2018: Photochemical & Photobiological Sciences
J Mensa, J Barberán, A Soriano, P Llinares, F Marco, R Cantón, G Bou, J González Del Castillo, E Maseda, J R Azanza, J Pasquau, C García-Vidal, J M Reguera, D Sousa, J Gómez, M Montejo, M Borges, A Torres, F Alvarez-Lerma, M Salavert, R Zaragoza, A Oliver
Pseudomonas aeruginosa is characterized by a notable intrinsic resistance to antibiotics, mainly mediated by the expression of inducible chromosomic β-lactamases and the production of constitutive or inducible efflux pumps. Apart from this intrinsic resistance, P. aeruginosa possess an extraordinary ability to develop resistance to nearly all available antimicrobials through selection of mutations. The progressive increase in resistance rates in P. aeruginosa has led to the emergence of strains which, based on their degree of resistance to common antibiotics, have been defined as multidrug resistant, extended-resistant and panresistant strains...
February 2018: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
Dilek Gurlek Gokcebay, Sibel Akpinar Tekgunduz
Severe neutropenia-associated invasive bacterial or fungal infections are still the major cause of mortality and morbidity in children receiving cancer chemotherapy. Granulocyte transfusion therapy has been used for many years in the management of neutropenic patients with severe infections in whom the clinical condition deteriorated despite appropriate antimicrobial treatment. Transfused granulocytes can increase the recipient's blood neutrophil count and accumulation of them into the site of infection. There are some data obtained from retrospective or prospective observational studies in pediatric granulocyte transfusion therapy, but results are not conclusive...
February 20, 2018: Transfusion and Apheresis Science
F N J Frakking, W S Bril, J C Sinnige, J E van 't Klooster, B A W de Jong, E J van Hannen, M Tersmette
BACKGROUND: A large outbreak of three epidemic vancomycin-resistant Enterococcus faecium (VRE) clones affected our hospital for almost two years. AIM: To describe the strategy to successfully control this outbreak and eradicate VRE from our hospital. METHODS: Infection control interventions started after detection of VRE in three patients. After ongoing transmission despite isolation precautions, cleaning and contact tracing, hospital-wide surveillance was started...
February 20, 2018: Journal of Hospital Infection
Tracy N Zembles, Linda S Flannery, Anna R Huppler
PURPOSE: The development and implementation of an antimicrobial lock therapy guideline at a large pediatric hospital are described. SUMMARY: Central venous access devices (CVADs) are essential in the medical management of patients requiring long-term total parenteral nutrition, chemotherapy, or hemodialysis. However, the use of a CVAD carries a significant risk of the development of central line-associated bloodstream infection (CLABSI). Antimicrobial lock therapy is indicated for patients with CLABSIs who have no signs of exit site or tunnel infection and for whom catheter salvage is a goal...
March 1, 2018: American Journal of Health-system Pharmacy: AJHP
Stéphanie Wagner, Eva K Brack, Eveline Stutz-Grunder, Philipp Agyeman, Kurt Leibundgut, Oliver Teuffel, Roland A Ammann
BACKGROUND: There is no evidence-based definition of the temperature limit defining fever (TLDF) in children with neutropenia. Lowering the TLDF is known to increase the number of episodes of fever in neutropenia (FN). This study aimed to investigate the influence of a lower versus standard TLDF on diagnostics and therapy. METHODS: In a single pediatric cancer center using a high standard TLDF (39°C tympanic-temperature) patients were observed prospectively (NCT01683370)...
2018: PloS One
Hongye Jiang, Jie Li, Aiyue Chen, Yinguang Li, Meng Xia, Peng Guo, Shuzhong Yao, Shuqin Chen
Cervical cancer greatly contributes to cancer-associated mortalities worldwide. The growing incidence of cervical cancer is of primary concern, and has signaled the need for multiple treatment options. Despite preliminary responses to chemotherapy and/or surgical interventions, the tumors consistently relapse. Previously, natural products gained attention for their diverse bioactivities, which include however are not limited to, neuroprotective, antimicrobial and anticancer effects. The present study evaluated the anticancer activity of fucosterol against a panel of human cancer cell lines...
March 2018: Oncology Letters
Deniz Gazel, Mehmet Yılmaz
Antimicrobial chemotherapy and surgery are classical methods for treating infectious diseases. However, there is a need for alternative methods to cure infections caused by antibiotic-resistant pathogens, recurrent or chronic infections, and unreachable local infections in which the use of drugs or surgery is anatomically and physically restricted. Several microorganisms are known to be sensitive to mild hyperthermia, and this sensitivity is one of the potential benefits proposed for the host during an episode of fever...
February 15, 2018: International Journal of Hyperthermia
Manohar Bhat, Swathi Acharya, Kakarla Veera Venkata Prasad, Raghavendra Kulkarni, Anithraj Bhat, Devikripa Bhat
Background: Dental plaque is one of the predominant causes of major oral diseases. Although mechanical and chemical methods are extensively followed to control the development of plaque, plaque-related diseases still persist. Therefore, this necessitates for alternative measures of plaque control, one such alternative is photodynamic antimicrobial chemotherapy (PACT). Materials and Methods: Split mouth randomized clinical trial (CTRI/2017/03/008239) was conducted on 30 participants who reported to the hospital...
May 2017: Journal of Indian Society of Periodontology
Jiexi Yan, Xiaolei Liang, Caijuan Bai, Lanxia Zhou, Juan Li, Kairong Wang, Yan Tang, Li Zhao
With the increase of multidrug resistance, novel anti-leukemia agents with diverse mechanisms of action are required to address this challenge. NK-18, the core region of mammalian derived protein NK-lysin, effectively inhibited the viability of both multidrug resistant and sensitive leukemia cell lines. Meanwhile, this proliferation inhibition effect was not distinct between sensitive and multidrug resistant leukemia cell line. NK-18 showed selectivity between non-tumorigenic and tumorigenic cells. It preferentially bound to tumor cells whose outer leaflet with high phosphatidylserine content...
February 7, 2018: Biochimie
Wanutsanun Tunyapanit, Sureerat Chelae, Kamolwish Laoprasopwattana
To determine the susceptibility and minimal inhibitory concentrations (MIC) of ceftazidime, the commonly used empirical antibiotic in patients with febrile neutropenia, in Escherichia coli and Klebsiella pneumoniae isolated from the intestinal microflora of pediatric patients with cancer, who received ciprofloxacin prophylaxis during chemotherapy, children younger than 18 years with acute lymphoblastic leukemia or lymphoma scheduled to undergo chemotherapy were randomized to receive oral ciprofloxacin 20 mg/kg/day or placebo from the beginning of their chemotherapy...
February 6, 2018: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
Marco Fiore, Marco Cascella, Sabrina Bimonte, Alberto Enrico Maraolo, Ivan Gentile, Vincenzo Schiavone, Maria Caterina Pace
Fungal infections of the liver, most commonly caused by Candida spp., often occur in patients with hematologic malignancies treated with chemotherapy. Colonization of the gastrointestinal tract is thought to be the main origin of dissemination of Candida ; mucositis and neutropenia facilitate the spread of Candida from the gastrointestinal tract to the liver. Hepatic involvement due to other fungi is a less common infectious complication in this setting. Fungal infections represent a less common cause of hepatic abscesses in non-oncohematologic population and the trend appears to be decreasing in recent years...
2018: Infection and Drug Resistance
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