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https://www.readbyqxmd.com/read/28067039/relighting-photosensitizers-by-synergistic-integration-of-albumin-and-perfluorocarbon-for-enhanced-photodynamic-therapy
#1
Hao Ren, Jiaqi Liu, Fenhong Su, Sizhan Ge, Ahu Yuan, Weimin Dai, Jinhui Wu, Yiqiao Hu
Photodynamic therapy (PDT) is hampered by poor water solubility and skin phototoxicity of photosensitizers (PSs). Incorporation of PSs into nanocarrier (Nano-PDT) has been designed to overcome these problems. However, self-quenching of PSs highly condensed in Nano-PDT significantly reduced singlet oxygen ((1)O2) generation, resulting in unsatisfactory PDT efficacy. Here, we developed a novel tripleffect Nano-PDT, which has a special core-shell nanostructure by synergistic integration of perfluorotributylamine (PFTBA) and human serum albumin (HSA) to improve PDT...
January 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28061990/treatment-of-newly-diagnosed-myeloma-bortezomib-based-triplet
#2
REVIEW
Archana M Rajan, S Vincent Rajkumar
We review the options for the treatment of newly diagnosed myeloma in a patient who is a candidate for autologous stem cell transplantation (ASCT). Bortezomib, lenalidomide, dexamethasone (VRD) has been studied in two randomized trials as first-line therapy. In one of these trials, VRD demonstrated improved overall survival compared with lenalidomide plus dexamethasone (Rd). By contrast, phase III data with overall survival differences are not available for other bortezomib-containing regimens compared with modern lenalidomide-containing regimens...
December 2016: Seminars in Oncology
https://www.readbyqxmd.com/read/28059428/photochemical-behavior-of-biosupramolecular-assemblies-of-photosensitizers-cucurbit-n-urils-and-albumins
#3
Javiera Cáceres, José Robinson-Duggon, Anita Tapia, Constanza Paiva, Matías Gómez, Cornelia Bohne, Denis Fuentealba
Biosupramolecular assemblies combining cucurbit[n]urils (CB[n]s) and proteins for the targeted delivery of drugs have the potential to improve the photoactivity of photosensitizers used in the photodynamic therapy of cancer. Understanding the complexity of these systems and how it affects the properties of photosensitizers is the focus of this work. We used acridine orange (AO(+)) as a model photosensitizer and compared it with methylene blue (MB(+)) and a cationic porphyrin (TMPyP(4+)). Encapsulation of the photosensitizers into CB[n]s (n = 7, 8) modified their photoactivity...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28058418/halogen-atom-effect-on-the-photophysical-properties-of-substituted-aza-bodipy-derivatives
#4
B C De Simone, G Mazzone, J Pirillo, N Russo, E Sicilia
The influence of halogen atom substitution (Br and I), in different amounts and positions in an aza-BODIPY skeleton, on the photophysical properties of some aza-BODIPY derivatives has been investigated by using density functional theory and its time-dependent extension. The heavy atom effect on excitation energies, singlet-triplet energy gaps and spin-orbit matrix elements has been considered. The maximum absorption within the therapeutic window has been confirmed for all the aza-BODIPY derivatives. The feasible intersystem spin crossing pathways for the population of the lowest triplet state, that will depend on the values of the spin-orbit matrix elements, the energy gap as well as the orbital composition of the involved states have been found to most likely involve the S1 and T1 or T2 states...
January 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28053287/clinical-parameters-to-guide-decision-making-in-elderly-metastatic-colorectal-cancer-patients-treated-with-intensive-cytotoxic-and-anti-angiogenic-therapy
#5
Gemma Bruera, Antonio Russo, Antonio Galvano, Sergio Rizzo, Enrico Ricevuto
INTRODUCTION: Bevacizumab addiction to triplet chemotherapy, according to FIr-B/FOx schedule, as first-line treatment in young-elderly metastatic colorectal CANCER (MCRC) patients may be more effective. Tailored treatments show worse clinical outcome in unfit patients. METHODS: Elderly patients were clinically evaluated according to age and comorbidity (Cumulative Illness Rating Scale) to select FIr-B/FOx regimen in fit or tailored treatments in unfit elderly. Limiting toxicity syndromes (LTS) were evaluated...
December 28, 2016: Oncotarget
https://www.readbyqxmd.com/read/28047787/th-ab-bra-02-automated-triplet-beam-orientation-optimization-for-mri-guided-co-60-radiotherapy
#6
D Nguyen, D Thomas, M Cao, D O'Connor, J Lamb, K Sheng
PURPOSE: MRI guided Co-60 provides daily and intrafractional MRI soft tissue imaging for improved target tracking and adaptive radiotherapy. To remedy the low output limitation, the system uses three Co-60 sources at 120° apart, but using all three sources in planning is considerably unintuitive. We automate the beam orientation optimization using column generation, and then solve a novel fluence map optimization (FMO) problem while regularizing the number of MLC segments. METHODS: Three patients-1 prostate (PRT), 1 lung (LNG), and 1 head-and-neck boost plan (H&NBoost)-were evaluated...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28028664/prognostic-factors-in-868-advanced-gastric-cancer-patients-treated-with-second-line-chemotherapy-in-the-real-world
#7
Valentina Fanotto, Stefano Cordio, Giulia Pasquini, Caterina Fontanella, Lorenza Rimassa, Francesco Leone, Gerardo Rosati, Daniele Santini, Riccardo Giampieri, Samantha Di Donato, Gianluca Tomasello, Nicola Silvestris, Filippo Pietrantonio, Francesca Battaglin, Antonio Avallone, Mario Scartozzi, Eufemia Stefania Lutrino, Davide Melisi, Lorenzo Antonuzzo, Antonio Pellegrino, Valter Torri, Giuseppe Aprile
BACKGROUND: Although second-line therapy is often considered for advanced gastric cancer patients, the optimal candidates are not well defined. METHODS: We retrospectively collected baseline parameters, tumour features, and treatment data for 868 advanced gastric cancer patients exposed to multiple treatment lines at 19 Italian centres. Cross-tables and chi-square tests were used to describe categorical features. To predict the impact of clinical variables on progression-free survival and overall survival, Kaplan-Meier and Cox regression analyses were performed...
December 27, 2016: Gastric Cancer
https://www.readbyqxmd.com/read/28028252/-chemotherapeutic-strategies-for-peritoneal-dissemination-of-gastric-cancer
#8
Tomohiro Matsushima, Takeru Wakatsuki, Daisuke Takahari, Keisho Chin, Kensei Yamaguchi
The prognosis of unresectable or metastatic gastric cancer is poor. One of the reasons for this is peritoneal dissemination, which is often observed in gastric cancer. Here, we discuss some new therapeutic strategies, especially chemotherapeutic strategies, for peritoneal dissemination of gastric cancer. Occasionally, in cases of peritoneal dissemination, patients have severe ascites or bowel obstruction. For those who have such complications, treatment via chemotherapy including S-1, capecitabine, or cisplatin is inappropriate...
December 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
https://www.readbyqxmd.com/read/28024081/deletion-of-the-gaa-repeats-from-the-human-frataxin-gene-using-the-crispr-cas9-system-in-yg8r-derived-cells-and-mouse-models-of-friedreich-ataxia
#9
D L Ouellet, K Cherif, J Rousseau, J P Tremblay
The Friedreich ataxia is a monogenic disease due to a hyperexpanded GAA triplet located within the first intron of the frataxin gene that causes transcriptional issues. The resulting frataxin protein deficiency leads to a Fe-S cluster biosynthesis dysfunction in the mitochondria and to oxidative stress and cell death. Here we use the CRISPR-Cas9 system to remove the mutated GAA expansion and restore the frataxin gene transcriptional activity and protein level. Both YG8R and YG8sR mouse models and cell lines derived from these mice were used to CRISPR-edited successfully the GAA expansion in vitro and in vivo...
January 19, 2017: Gene Therapy
https://www.readbyqxmd.com/read/28009169/photophysical-properties-of-s-se-and-te-substituted-deoxyguanosines-insight-into-their-ability-to-act-as-chemotherapeutic-agents
#10
Jenny Pirillo, Gloria Mazzone, Nino Russo, Luca Bertini
Guanine and guanosine derivatives have long been in use as anticancer drugs and recently have been proposed also as photosensitizers in photodynamic therapy. By means of density functional theory and its time-dependent formulation, the potential power as UVA chemotherapeutic agents has been investigated computing the photophysical properties (absorption spectra, excitation energies, and spin-orbit matrix elements) of sulfur, selenium, and tellurium-substituted deoxyguanosines. Different pathways for the population of the lowest triplet state have been considered...
January 12, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/27976779/parietin-an-efficient-photo-screening-pigment-in-vivo-with-good-photosensitizing-and-photodynamic-antibacterial-effects-in-vitro
#11
Laura R Comini, F Eduardo Morán Vieyra, Ricardo A Mignone, Paulina L Páez, M Laura Mugas, Brenda S Konigheim, José L Cabrera, Susana C Núñez Montoya, Claudio D Borsarelli
The photophysical, photoinduced pro-oxidant and antibacterial properties in vitro of the natural occurring parietin (PTN; 1,8-dihydroxy-3-methoxy-6-methyl-9,10-anthraquinone) were evaluated. PTN was extracted from the lichen identified as Teloschistes flavicans (Sw.) Norm. (Telochistaceae). Results indicate that in chloroform solution, PTN presents spectroscopic features corresponding to an excited-state intramolecular proton-transfer (ESIPT) state with partial keto-enol tautomerization. In argon-saturated solutions, the singlet excited state is poorly fluorescent (ΦF = 0...
December 15, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27942676/singlet-oxygen-feedback-delayed-fluorescence-of-protoporphyrin-ix-in-organic-solutions
#12
Ivo S Vinklárek, Marek Scholz, Roman Dědic, Jan Hála
Delayed fluorescence (DF) of protoporphyrin IX (PpIX) has been recently proposed as a tool for monitoring of mitochondrial oxygen tension in vivo as well as for observation of the effectiveness of photodynamic therapy (PDT) [E. G. Mik, Anesth. Analg., 2013, 117, 834-346; F. Piffaretti et al., J. Biomed. Opt., 2012, 17, 115007]. However, the efficiency of the mechanism of thermal activation (E-type DF), which was considered in the papers, is limited due to a large energy gap between the first excited singlet and the first triplet state of PpIX at room or body temperatures...
December 12, 2016: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/27934026/two-photon-absorbing-phosphorescent-metalloporphyrins-effects-of-%C3%AF-extension-and-peripheral-substitution
#13
Tatiana V Esipova, Héctor J Rivera-Jacquez, Bruno Weber, Artëm E Masunov, Sergei A Vinogradov
The ability to form triplet excited states upon two-photon excitation is important for several applications of metalloporphyrins, including two-photon phosphorescence lifetime microscopy (2PLM) and two-photon photodynamic therapy (PDT). Here we analyzed one-photon (1P) and degenerate two-photon (2P) absorption properties of several phosphorescent Pt (II) porphyrins, focusing on the effects of aromatic π-extension and peripheral substitution on triplet emissivity and two-photon absorption (2PA). Our 2PA measurements for the first time made use of direct time-resolved detection of phosphorescence, having the ability to efficiently reject laser background through microsecond time gating...
December 7, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27930525/efficacy-analysis-of-the-aprepitant-combined-antiemetic-prophylaxis-for-non-round-cell-soft-tissue-sarcoma-patients-received-adriamycin-and-ifosfamide-therapy
#14
Hitoshi Kusaba, Hozumi Kumagai, Kyoko Inadomi, Tomoya Matsunobu, Katsumi Harimaya, Kotoe Takayoshi, Shuji Arita, Hiroshi Ariyama, Koichi Akashi, Eishi Baba
Appropriate antiemetic prophylaxis for moderately emetogenic chemotherapy in patients with non-round cell soft-tissue sarcomas (NRC-STS) remains unclear. We retrospectively investigated efficacy and safety of aprepitant-combined antiemetic prophylaxis in patients with NRC-STS receiving adriamycin plus ifosfamide (AI) therapy. Forty NRC-STS patients were enrolled, their median age was 50 years (range 18-74), and 13 (32.5%) were female. Median cycle number of AI therapy was 4. Twenty patients received the doublet antiemetic prophylaxis (5-hydroxytryptamine-3 receptor antagonist and dexamethasone), and 20 received triplet (5-hydroxytryptamine-3 receptor antagonist, dexamethasone, and aprepitant)...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27929427/a-comparison-of-singlet-oxygen-explicit-dosimetry-soed-and-singlet-oxygen-luminescence-dosimetry-sold-for-photofrin-mediated-photodynamic-therapy
#15
Michele M Kim, Rozhin Penjweini, Nathan R Gemmell, Israel Veilleux, Aongus McCarthy, Gerald S Buller, Robert H Hadfield, Brian C Wilson, Timothy C Zhu
Accurate photodynamic therapy (PDT) dosimetry is critical for the use of PDT in the treatment of malignant and nonmalignant localized diseases. A singlet oxygen explicit dosimetry (SOED) model has been developed for in vivo purposes. It involves the measurement of the key components in PDT-light fluence (rate), photosensitizer concentration, and ground-state oxygen concentration ([³O₂])-to calculate the amount of reacted singlet oxygen ([¹O₂]rx), the main cytotoxic component in type II PDT. Experiments were performed in phantoms with the photosensitizer Photofrin and in solution using phosphorescence-based singlet oxygen luminescence dosimetry (SOLD) to validate the SOED model...
December 6, 2016: Cancers
https://www.readbyqxmd.com/read/27873175/mobilization-of-human-immature-hematopoietic-progenitors-through-combinatory-use-of-bortezomib-and-immunomodulatory-drugs
#16
Taro Tochigi, Takatoshi Aoki, Yoshikane Kikushige, Tomohiko Kamimura, Yoshikiyo Ito, Takahiro Shima, Takuji Yamauchi, Yasuo Mori, Goichi Yoshimoto, Kenjiro Kamezaki, Koji Kato, Katsuto Takenaka, Hiromi Iwasaki, Koichi Akashi, Toshihiro Miyamoto
Combination use of the proteasome inhibitor bortezomib and the immunomodulatory drugs lenalidomide or thalidomide has provided superior outcomes in multiple myeloma over their single use; however, these combinations can produce significant toxicities. Unexpectedly, we found a small but significant increase in the population of immature granulocytes and erythrocytes/megakaryocytes in peripheral blood in 16 of 22 patients (73%) treated with dexamethasone in combination with bortezomib and immunomodulatory drugs (triplet), but not in any of 25 patients treated with either bortezomib or immunomodulatory drugs with dexamethasone (doublet)...
November 21, 2016: International Journal of Hematology
https://www.readbyqxmd.com/read/27864161/maintenance-versus-induction-therapy-choice-on-outcomes-after-autologous-transplantation-for-multiple-myeloma
#17
Robert F Cornell, Anita D'Souza, Adetola A Kassim, Luciano J Costa, Racquel D Innis-Shelton, Mei-Jie Zhang, Jiaxing Huang, Muneer Abidi, Jack Aiello, Gorgun Akpek, Asad Bashey, Qaiser Bashir, Jan Cerny, Raymond Comenzo, Miguel Angel Diaz, César Freytes, Robert Peter Gale, Siddhartha Ganguly, Mehdi Hamadani, Shahrukh Hashmi, Leona Holmberg, Nasheed Hossain, Rammurti T Kamble, Mohamed Kharfan-Dabaja, Tamila Kindwall-Keller, Robert Kyle, Shaji Kumar, Hillard Lazarus, Cindy Lee, Angelo Maiolino, David I Marks, Kenneth Meehan, Joe Mikhael, Rajneesh Nath, Taiga Nishihori, Richard F Olsson, Muthalagu Ramanathan, Ayman Saad, Sachiko Seo, Saad Usmani, David Vesole, Ravi Vij, Dan Vogl, Baldeep M Wirk, Jean Yared, Amrita Krishnan, Tomer Mark, Yago Nieto, Parameswaran Hari
Bortezomib (V), lenalidomide (R), cyclophosphamide (C), and dexamethasone (D) are components of the most commonly used modern doublet (RD, VD) or triplet (VRD, CVD) initial induction regimens before autologous hematopoietic cell transplantation (AHCT) for multiple myeloma (MM) in the United States. In this study we evaluated 693 patients receiving "upfront" AHCT after initial induction therapy with modern doublet or triplet regimens using data reported to the Center for International Blood and Marrow Transplant Research from 2008 to 2013...
February 2017: Biology of Blood and Marrow Transplantation
https://www.readbyqxmd.com/read/27853996/a-phase-1-study-combining-the-her3-antibody-seribantumab-mm-121-and-cetuximab-with-and-without-irinotecan
#18
James M Cleary, Autumn J McRee, Geoffrey I Shapiro, Sara M Tolaney, Bert H O'Neil, Jeffrey D Kearns, Sara Mathews, Rachel Nering, Gavin MacBeath, Akos Czibere, Sunil Sharma, W Michael Korn
Background HER3/EGFR heterodimers have been implicated as a mode of resistance to EGFR-directed therapies. Methods This Phase 1 trial assessed the tolerability, maximum tolerated dose (MTD) and pharmacokinetic (PK) properties of the HER-3 antibody seribantumab in combination with cetuximab (Part I) or cetuximab and irinotecan (Part II) in patients with EGFR-dependent cancers. In Part I, escalating doses of seribantumab and cetuximab were administered. In Part II of the trial, escalating doses of seribantumab/cetuximab were combined with irinotecan 180 mg/m2 administered every two weeks...
November 16, 2016: Investigational New Drugs
https://www.readbyqxmd.com/read/27829278/systemic-therapy-for-biliary-cancers
#19
Emmet Jordan, Ghassan K Abou-Alfa, Maeve A Lowery
Biliary tract cancers represent an uncommon, heterogenous malignant group of tumors that include gallbladder cancers (GBC) and cholangiocarcinomas that are frequently detected in the locally advanced or metastatic setting. The randomized phase III ABC-02 trial established the combination regimen of cisplatin plus gemcitabine as standard of care therapy. Nevertheless, despite prior and subsequent attempts utilizing a variety of treatment strategies clinical outcomes for these cancers remains disappointing, necessitating the innate call for improvements in treatment approaches...
October 2016: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/27799509/on-the-effect-of-triplet-or-doublet-chemotherapy-in-advanced-gastric-cancer-results-from-a-national-cancer-registry
#20
Alberto Carmona-Bayonas, Paula Jiménez-Fonseca, Maria Luisa Sánchez Lorenzo, Avinash Ramchandani, Elena Asensio Martínez, Ana Custodio, Marcelo Garrido, Isabel Echavarría, Juana María Cano, Jose Enrique Lorenzo Barreto, Teresa García García, Felipe Álvarez Manceñido, Alejandra Lacalle, Marta Ferrer Cardona, Monserrat Mangas, Laura Visa, Elvira Buxó, Aitor Azkarate, Asunción Díaz-Serrano, Ana Fernández Montes, Fernando Rivera
BACKGROUND: There is currently no consensus regarding first-line chemotherapy for patients with advanced gastric cancer (AGC) who are ineligible to receive trastuzumab. The objective of this study was to evaluate the efficacy and tolerance of triplets versus doublets by analyzing a national gastric cancer registry. PATIENTS AND METHOD: Patients with AGC treated with polychemotherapy without associating trastuzumab were included from 2008 through 2016. The effect of triplets versus doublets was compared using 3 methods: Cox proportional hazards regression, propensity score matching (PSM), and coarsened exact matching (CEM)...
November 2016: Journal of the National Comprehensive Cancer Network: JNCCN
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