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https://www.readbyqxmd.com/read/28820528/deciphering-the-photosensitization-mechanisms-of-hypericin-towards-biological-membranes
#1
Hugo Gattuso, Marco Marazzi, François Dehez, Antonio Monari
Resorting to state-of-the art molecular modeling and simulation techniques we provide full characterization of the photophysical properties of the naturally occurring hypericin chromophore, currently used in photodynamic therapy. In particular, we reveal the different photophysical pathways leading to intersystem-crossing and hence, triplet manifold population that is necessary for the subsequent production of singlet oxygen. In particular we identify an extended region of quasi-degeneracy between the first singlet excited state and three triplet state surfaces...
August 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28817838/pharmacogenetic-determinants-of-outcomes-on-triplet-hepatic-artery-infusion-and-intravenous-cetuximab-for-liver-metastases-from-colorectal-cancer-european-trial-optiliv-nct00852228
#2
Francis Lévi, Abdoulaye Karaboué, Raphaël Saffroy, Christophe Desterke, Valerie Boige, Denis Smith, Mohamed Hebbar, Pasquale Innominato, Julien Taieb, Carlos Carvalho, Rosine Guimbaud, Christian Focan, Mohamed Bouchahda, René Adam, Michel Ducreux, Gérard Milano, Antoinette Lemoine
BACKGROUND: The hepatic artery infusion (HAI) of irinotecan, oxaliplatin and 5-fluorouracil with intravenous cetuximab achieved outstanding efficacy in previously treated patients with initially unresectable liver metastases from colorectal cancer. This planned study aimed at the identification of pharmacogenetic predictors of outcomes. METHODS: Circulating mononuclear cells were analysed for 207 single-nucleotide polymorphisms (SNPs) from 34 pharmacology genes...
August 17, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28768450/outcome-of-dichorionic-triamniotic-triplet-the-experience-from-an-emerging-fetal-therapy-center
#3
Luming Sun, Gang Zou, Fenhe Zhou, Yingjun Yang, Dick Oepkes, Tao Duan
OBJECTIVES: To report a cohort of dichorionic triamniotic (DCTA) triplets with access to contemporary fetal interventions. DESIGN: Prospective study. SETTING: A regional referral center for the diagnosis and management of complicated multiple pregnancies. POPULATION: All DCTA triplets receiving consultation and prenatal care at our center from 2010 to 2015. METHODS: The following management alternatives for DCTA were offered: 1) expectant management; 2) reduction of 1 or 2 fetus of the monochorionic component using radio frequency ablation (RFA) after 16 weeks or potassium chloride (KCL) before 16 weeks, respectively; 3) reduction of the isolated fetus using KCL before 16 weeks...
August 3, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28766008/concurrent-paclitaxel-capecitabine-mitomycin-c-and-pelvic-radiation-therapy-for-patients-with-squamous-cell-anal-carcinoma
#4
Sergey S Gordeyev, Arsen O Rasulov, Vera A Gorbounova, Sergey I Tkachev, Valeriya V Glebovskaya, Mikhail Yu Fedyanin, Nataliya S Besova, Yulia E Surayeva
PURPOSE: The goals of this study were to assess safety and efficacy of triplet chemoradiotherapy (CRT) with paclitaxel for squamous cell anal carcinoma (SCAC). METHODS: Patients with stage I-IIIB SCAC were enrolled and received 52-58 Gy intensity-modulated radiotherapy (IMRT) (with dose based on the T stage) in consecutive daily 1.8-2.2 Gy fractions. The concurrent chemotherapy consisted of paclitaxel 45 mg/m(2) days 3, 10, 17, 24, 31, capecitabine 625 mg/m(2) bid on treatment days and mitomycin C 10 g/m(2) on day 1...
August 1, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28764748/a-phase-i-trial-of-ganetespib-in-combination-with-paclitaxel-and-trastuzumab-in-patients-with-human-epidermal-growth-factor-receptor-2-her2-positive-metastatic-breast-cancer
#5
Komal Jhaveri, Rui Wang, Eleonora Teplinsky, Sarat Chandarlapaty, David Solit, Karen Cadoo, James Speyer, Gabriella D'Andrea, Sylvia Adams, Sujata Patil, Sofia Haque, Tara O'Neill, Kent Friedman, Francisco J Esteva, Clifford Hudis, Shanu Modi
BACKGROUND: Targeted therapies in HER2-positive metastatic breast cancer significantly improve outcomes but efficacy is limited by therapeutic resistance. HER2 is an acutely sensitive Heat Shock Protein 90 (HSP90) client and HSP90 inhibition can overcome trastuzumab resistance. Preclinical data suggest that HSP90 inhibition is synergistic with taxanes with the potential for significant clinical activity. We therefore tested ganetespib, a HSP90 inhibitor, in combination with paclitaxel and trastuzumab in patients with trastuzumab-refractory HER2-positive metastatic breast cancer...
August 2, 2017: Breast Cancer Research: BCR
https://www.readbyqxmd.com/read/28750754/physiological-considerations-acting-on-triplet-oxygen-for-explicit-dosimetry-in-photodynamic-therapy
#6
Víctor Sánchez, María Paulina Romero, Sebastião Pratavieira, César Costa
The aims of this study were to determine the spatial and temporal theoretical distribution of the concentrations of Protoporphyrin IX, (3)O2 and doses of (1)O2. The type II mechanism and explicit dosimetry in photodynamic therapy were used. Furthermore, the mechanism of respiration and cellular metabolism acting on (3)O2 were taken into account. The dermis was considered as an absorbing and a scattering medium. An analytical solution was used for light diffusion in the skin. The photophysical, photochemical and biological effects caused by PDT with the initial irradiances of 20, 60 and 150mW/cm(2) were studied for a time of exposure of 20min...
July 24, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28747580/emerging-drugs-and-combinations-to-treat-multiple-myeloma
#7
REVIEW
Alessandra Larocca, Roberto Mina, Francesca Gay, Sara Bringhen, Mario Boccadoro
In the past few years, multiple targeted therapies and immunotherapies including second generation immunomodulatory drugs (pomalidomide) and proteasome inhibitors (carfilzomib, ixazomib), monoclonal antibodies and checkpoint inhibitors were approved for the treatment of myeloma or entered advanced phases of clinical testing. These agents showed significant activity in advanced myeloma and increased the available treatment strategies.Pomalidomide is well-tolerated and effective in patients with relapsed/refractory multiple myeloma who have exhausted any possible treatment with lenalidomide and bortezomib...
July 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28730292/efficacy-and-safety-of-taxane-monotherapy-in-advanced-gastric-cancer-refractory-to-triplet-chemotherapy-with-docetaxel-cisplatin-and-s-1-a-multicenter-retrospective-study
#8
Sakura Iizumi, Atsuo Takashima, Yukiya Narita, Masahiro Tajika, Kei Muro, Sadayuki Kawai, Hirofumi Yasui, Tomohiro Matsushima, Daisuke Takahari, Kengo Nagashima, Narikazu Boku
PURPOSE: Taxane monotherapy is widely used for advanced gastric cancer (AGC) after failure of standard first-line chemotherapy with fluoropyrimidine and cisplatin. Triplet chemotherapy with docetaxel, cisplatin, and S-1 (DCS) is a promising regimen for first-line chemotherapy of AGC. The aim of this study was to evaluate the efficacy of taxane monotherapy in patients refractory to DCS. METHODS: We retrospectively evaluated the efficacy and safety of taxane monotherapy in patients with AGC refractory to first-line therapy with DCS between January 2010 and April 2015...
July 20, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28726387/aryl-substituted-ruthenium-ii-complexes-a-strategy-for-enhanced-photocleavage-and-efficient-dna-binding
#9
Felipe Diógenes Abreu, Tercio de F Paulo, Marcelo H Gehlen, Rômulo A Ando, Luiz G F Lopes, Ana Cláudia S Gondim, Mayron A Vasconcelos, Edson H Teixeira, Eduardo Henrique Silva Sousa, Idalina Maria Moreira de Carvalho
Ruthenium polypyridine complexes have shown promise as agents for photodynamic therapy (PDT) and tools for molecular biology (chromophore-assisted light inactivation). To accomplish these tasks, it is important to have at least target selectivity and great reactive oxygen species (ROS) photogeneration: two properties that are not easily found in the same molecule. To prepare such new agents, we synthesized two new ruthenium complexes that combine an efficient DNA binding moiety (dppz ligand) together with naphthyl-modified (1) and anthracenyl-modified (2) bipyridine as a strong ROS generator bound to a ruthenium complex...
August 7, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28725278/asco-2016-update-colorectal-liver-metastases
#10
REVIEW
Klaus Kaczirek
This short review summarizes the most relevant data on colorectal liver metastases (CLM) presented at the 2016 Annual Meeting of the American Society of Clinical Oncology (ASCO). For this update, congress abstracts were grouped into three clinically relevant scenarios: CLM that are deemed upfront resectable, borderline resectable, and primarily unresectable. According to a large registry study, small, upfront resectable, solitary CLM should be resected using a parenchymal sparing technique. A prospective noninterventional study suggested that chemotherapy plus the anti-VEGF (vascular endothelial growth factor) antibody bevacizumab is effective and well tolerated in patients with borderline resectable CLM...
2017: Memo
https://www.readbyqxmd.com/read/28721065/optimizing-the-treatment-of-bevacizumab-as-first-line-therapy-for-human-epidermal-growth-factor-receptor-2-her2-negative-advanced-breast-cancer-an-updated-meta-analysis-of-published-randomized-trials
#11
Cunfu Li, Aizhai Xiang, Xianzhi Chen, Kai Yin, Jinsong Lu, Wenjin Yin
BACKGROUND: Manifold data have demonstrated that the addition of bevacizumab to chemotherapy improved progression-free survival (PFS), while few trials have revealed its significant overall survival (OS) benefit. Furthermore, it still remains suspended how to maximize the benefits of bevacizumab as first-line therapy for human epidermal growth factor receptor 2 (HER2)-negative breast cancer. We sought to conduct a meta-analysis to assess the benefits of bevacizumab with chemotherapy and to identify the ideal chemotherapy partner of bevacizumab in the first-line setting for HER2-negative advanced breast cancer patients...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/28698469/potential-of-integrin-inhibitors-for-treating-ovarian-cancer-a-literature-review
#12
REVIEW
Masaki Kobayashi, Kenjiro Sawada, Tadashi Kimura
Epithelial ovarian cancer is a fatal disease, with a cure rate of only 30%. Several recent studies have targeted integrins for cancer treatment. Preclinical studies have shown the effectiveness of several integrin inhibitors for blocking cancer progression, especially by blocking angiogenesis. Because the initial critical step in ovarian cancer metastasis is the attachment of cancer cells to the peritoneum or omentum and because clinical trials have provided positive results for anti-angiogenic therapy, therapies targeting integrins may be the most feasible approach for treating cancer...
July 8, 2017: Cancers
https://www.readbyqxmd.com/read/28678836/epistasis-in-genomic-and-survival-data-of-cancer-patients
#13
Dariusz Matlak, Ewa Szczurek
Cancer aggressiveness and its effect on patient survival depends on mutations in the tumor genome. Epistatic interactions between the mutated genes may guide the choice of anticancer therapy and set predictive factors of its success. Inhibitors targeting synthetic lethal partners of genes mutated in tumors are already utilized for efficient and specific treatment in the clinic. The space of possible epistatic interactions, however, is overwhelming, and computational methods are needed to limit the experimental effort of validating the interactions for therapy and characterizing their biomarkers...
July 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28678497/excited-state-dynamics-of-a-photobiologically-active-ru-ii-dyad-are-altered-in-biologically-relevant-environments
#14
Christian Reichardt, Kilian R A Schneider, Tariq Sainuddin, Maria Wächtler, Sherri A McFarland, Benjamin Dietzek
In this study femtosecond and nanosecond time-resolved transient absorption spectroscopy was used to investigate the influence of ionic strength and complexity on the excited state dynamics of a Ru(II)-based metal-organic dyad. The bis-heteroleptic complex [Ru(bpy)2(ippy)](2+) (1), where bpy = 2,2'-bipyridine and ippy = 2-(1-pyrenyl-1H-imidazo[4,5-f][1,10]phenanthroline, is a potent photosensitizer for in vitro photodynamic therapy (PDT) and photodynamic inactivation (PDI) of microorganisms owing to a long-lived triplet excited state derived from a metal-to-ligand charge-transfer ((3)MLCT) state that is equilibrium with an intraligand ((3)IL) state...
July 25, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28665328/metal-atom-effect-on-the-photophysical-properties-of-mg-ii-zn-ii-cd-ii-and-pd-ii-tetraphenylporphyrin-complexes-proposed-as-possible-drugs-in-photodynamic-therapy
#15
Bruna Clara De Simone, Gloria Mazzone, Nino Russo, Emilia Sicilia, Marirosa Toscano
The effects of Mg, Zn, Cd, and Pd dications on the photophysical properties of the tetraphenylporphyrin ligand have been explored, considering the corresponding complexes and by using the density functional theory and its time-dependent extension. Results show that absorption wavelengths do not change significantly when the metal ion changes contrary to what happens to the singlet-triplet energy gaps (ΔES-T) and the spin-orbit matrix elements ΨSnHsoΨTm. The most probable intersystem spin crossing (ISC) pathways for the population of the lowest triplet states have been explored...
June 30, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28664431/investigation-of-operative-outcomes-of-thoracoscopic-esophagectomy-after-triplet-chemotherapy-with-docetaxel-cisplatin-and-5-fluorouracil-for-advanced-esophageal-squamous-cell-carcinoma
#16
Yuji Akiyama, Takeshi Iwaya, Fumitaka Endo, Takehiro Chiba, Takeshi Takahara, Koki Otsuka, Hiroyuki Nitta, Keisuke Koeda, Masaru Mizuno, Yusuke Kimura, Akira Sasaki
BACKGROUND: Preoperative chemotherapy with cisplatin and 5-fluorouracil (CF) has become the standard treatment for resectable stage II/III thoracic esophageal carcinoma in Japan. Recently, preoperative triplet chemotherapy with docetaxel, cisplatin, and 5-fluorouracil (DCF) has been reported to be effective for locally advanced esophageal cancer. Thoracoscopic esophagectomy (TE) has been increasingly accepted worldwide for the treatment of esophageal cancer. We conducted a retrospective study to evaluate the safety and outcomes of TE after DCF therapy for patients with advanced esophageal cancer...
June 29, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28642346/detergent-induced-self-assembly-and-controllable-photosensitizer-activity-of-diester-phenylene-ethynylenes
#17
Patrick L Donabedian, Matthew N Creyer, Florencia A Monge, Kirk S Schanze, Eva Y Chi, David G Whitten
Photodynamic therapy, in which malignant tissue is killed by targeted light exposure following administration of a photosensitizer, can be a valuable treatment modality but currently relies on passive transport and local irradiation to avoid off-target oxidation. We present a system of excited-state control for truly local delivery of singlet oxygen. An anionic phenylene ethynylene oligomer is initially quenched by water, producing minimal fluorescence and no measurable singlet oxygen generation. When presented with a binding partner, in this case an oppositely charged surfactant, changes in solvent microenvironment result in fluorescence unquenching, restoration of intersystem crossing to the triplet state, and singlet oxygen generation, as assayed by transient absorption spectroscopy and chemical trapping...
July 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28633036/recent-advances-in-understanding-multiple-myeloma
#18
REVIEW
Parameswaran Hari
There have been major recent advancements in the understanding and management of multiple myeloma which in turn has led to unprecedented survival outcomes for patients. Diagnostic and response criteria have been recently revised. Our understanding of clonal progression, evolution, and clonal tides will inform therapeutic choices and appropriate treatment for patients. Response rates to initial induction with modern triplet therapies containing proteasome inhibitors and immunomodulators have made this approach the global standard for initial treatment...
June 13, 2017: Hematology/oncology and Stem Cell Therapy
https://www.readbyqxmd.com/read/28626897/ultrastable-near-infrared-conjugated-polymer-nanoparticles-for-dually-photoactive-tumor-inhibition
#19
Tao Yang, Ling Liu, Yibin Deng, Zhengqing Guo, Guobing Zhang, Zhishen Ge, Hengte Ke, Huabing Chen
It is highly desired that satisfactory photoactive agents with ideal photophysical characteristics are explored for potent cancer phototherapeutics. Herein, bifunctional nanoparticles of low-bandgap donor-acceptor (D-A)-type conjugated-polymer nanoparticles (CP-NPs) are developed to afford a highly efficient singlet-to-triplet transition and photothermal conversion for near-infrared (NIR) light-induced photodynamic (PDT)/photothermal (PTT) treatment. CP-NPs display remarkable NIR absorption with the peak at 782 nm, and perfect resistance to photobleaching...
June 19, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28604869/near-infrared-emitting-heteroleptic-cationic-iridium-complexes-derived-from-2-3-diphenylbenzo-g-quinoxaline-as-in-vitro-theranostic-photodynamic-therapy-agents
#20
Li Wang, Huimin Yin, Peng Cui, Marc Hetu, Chengzhe Wang, Susan Monro, Richard D Schaller, Colin G Cameron, Bingqing Liu, Svetlana Kilina, Sherri A McFarland, Wenfang Sun
Five heteroleptic cationic iridium complexes with a π-expansive cyclometalating 2,3-diphenylbenzo[g]quinoxaline (dpbq) ligand (C^N ligand) and different diimine ligands (N^N ligands) (i.e. 2,2'-bipyridine (bpy, 1), phenanthroline (phen, 2), 2-(2-pyridinyl)quinoline (pqu, 3), 2,2'-bisquinoline (bqu, 4), and 2-(quinolin-2-yl)quinoxaline (quqo, 5)) were synthesized and characterized. The lowest-energy singlet electronic transitions (S1 states) were mainly dpbq ligand-centred (1)ILCT (intraligand charge transfer)/(1)MLCT (metal to ligand charge transfer) transitions mixed with some (1)π,π* transitions for complexes 1-4 with increased contributions from (1)LLCT (ligand to ligand charge transfer) in 3 and 4...
June 27, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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