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irradiation and immune

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https://www.readbyqxmd.com/read/28922374/fractional-laser-exposure-induces-neutrophil-infiltration-n1-phenotype-into-the-tumor-and-stimulates-systemic-anti-tumor-immune-response
#1
Masayoshi Kawakubo, Shadmehr Demehri, Dieter Manstein
BACKGROUND: Ablative fractional photothermolysis (aFP) using a CO2 laser generates multiple small diameter tissue lesions within the irradiation field. aFP is commonly used for a wide variety of dermatological indications, including treatment of photodamaged skin and dyschromia, drug delivery and modification of scars due to acne, surgical procedures and burns. In this study we explore the utility of aFP for treating oncological indications, including induction of local tumor regression and inducing anti-tumor immunity, which is in marked contrast to current indications of aFP...
2017: PloS One
https://www.readbyqxmd.com/read/28918263/dna-nanotechnology-based-composite-type-gold-nanoparticle-immunostimulatory-dna-hydrogel-for-tumor-photothermal-immunotherapy
#2
Tomoya Yata, Yuki Takahashi, Mengmeng Tan, Hirotaka Nakatsuji, Shozo Ohtsuki, Tatsuya Murakami, Hiroshi Imahori, Yuka Umeki, Tomoki Shiomi, Yoshinobu Takakura, Makiya Nishikawa
Success of tumor photothermal immunotherapy requires a system that induces heat stress in cancer cells and enhances strong anti-tumor immune responses. Here, we designed a composite-type immunostimulatory DNA hydrogel consisting of a hexapod-like structured DNA (hexapodna) with CpG sequences and gold nanoparticles. Mixing of the properly designed hexapodna and oligodeoxynucleotide-modified gold nanoparticles resulted in the formation of composite-type gold nanoparticle-DNA hydrogels. Laser irradiation of the hydrogel resulted in the release of hexapodna, which efficiently stimulated immune cells to release proinflammatory cytokines...
September 9, 2017: Biomaterials
https://www.readbyqxmd.com/read/28917247/the-optimism-surrounding-stereotactic-body-radiation-therapy-and-immunomodulation
#3
Hannah Tharmalingam, Peter J Hoskin
In recent years, rapidly evolving radiation techniques have enabled the precise delivery of very high doses of radiation to local targets with stereotactic ablative body radiotherapy (SABR). In addition to its direct cytotoxicity, radiation and in particular SABR has powerful immunomodulatory effects resulting in immunogenic cell death and potentiation of the anti-tumour immune response. However, due to the immunosuppressive nature of non-irradiated sites of metastases, radiotherapy alone is seldom sufficient to induce the systemic response required for distant tumour rejection...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28916224/lack-of-differences-in-radiation-induced-immunogenicity-parameters-between-hpv-positive-and-hpv-negative-human-hnscc-cell-lines
#4
Karolin Schneider, Vanesa Bol, Vincent Grégoire
BACKGROUND AND PURPOSE: Clinical studies indicate that patients with HPV/p16-associated head & neck squamous cell carcinoma (HNSCC) represent a subgroup with a better prognosis and improved response to conventional radiotherapy. Involvement of immune-based factors has been hypothesized. In the present study, we investigated radiation-induced differences in release of damage associated molecular patterns (DAMPs), cytokines and activation of dendritic cells (DCs) in HPV-positive and negative HNSCC cancer cell lines...
September 12, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28913973/bone-marrow-stem-cells-do-not-contribute-to-endometrial-cell-lineages-in-chimeric-mouse-models
#5
Yih Rue Ong, Fiona L Cousins, Xiaoqing Yang, Ahmed Aedh A Al Mushafi, David T Breault, Caroline E Gargett, James A Deane
Studies from five independent laboratories conclude that bone marrow stem cells transdifferentiate into endometrial stroma, epithelium and endothelium. We investigated the nature of bone marrow-derived cells in the mouse endometrium by reconstituting irradiated wild type recipients with bone marrow containing transgenic mTert-GFP or chicken β-actin-GFP reporters. mTert-GFP is a telomerase marker identifying hematopoietic stem cells and subpopulations of epithelial, endothelial and immune cells in the endometrium...
September 15, 2017: Stem Cells
https://www.readbyqxmd.com/read/28913854/preoperative-ultraviolet-b-inflammation-in-skin-modelling-individual-differences-in-acute-postoperative-pain-and-neuro-immune-interactions
#6
T H Lunn, J M Dawes, F Denk, D L Bennett, H Husted, H Kehlet, S B McMahon
BACKGROUND: Neuroimmune interactions play a vital role in many of the most common pain conditions, such as arthritis. There have been many attempts to derive clinically predictive information from an individual's inflammatory response in order to gauge subsequent pain perception. OBJECTIVES: Here, we wanted to test whether this effort could be enhanced and complemented by the use of a model system which takes into account the function of not just circulating, but also tissue-resident immune cells: ultraviolet B (UVB) irradiation of the skin...
September 14, 2017: European Journal of Pain: EJP
https://www.readbyqxmd.com/read/28912510/the-th1-th17-balance-dictates-the-fibrosis-response-in-murine-radiation-induced-lung-disease
#7
Alexandra Paun, Marie-Eve Bergeron, Christina K Haston
Radiotherapy can result in lung diseases pneumonitis or fibrosis dependent on patient susceptibility. Herein we used inbred and genetically altered mice to investigate whether the tissue adaptive immune response to radiation injury influences the development of radiation-induced lung disease. Six inbred mouse strains were exposed to 18 Gy whole thorax irradiation and upon respiratory distress strains prone to pneumonitis with fibrosis presented an increased pulmonary frequency of Thelper (Th)17 cells which was not evident in strains prone solely to pneumonitis...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28905664/assessment-of-the-neutralizing-potency-of-antisera-raised-against-native-and-%C3%AE-irradiated-naja-nigricollis-black-necked-spitting-cobra-venom-in-rabbits-concerning-its-cardiotoxic-effect
#8
F Abdou, E E Denshary, E Shaaban, M Mohamed
The present study was designed to prepare a specific safe antiserum for Naja nigricollis using γ-irradiated (1.5KGy and3KGy) venoms. Rabbits were used for active immunization using irradiated venoms (1.5 and 3 kGy) as a toxoid, mice were used for determination of LD50 post immunization and the rats were used for neutralization of the cardiotoxic effect of venom. Results of the immunodiffusion test indicated that the sera of rabbits raised against non-irradiated, 1.5- and 3-kGy γ-irradiated venom, had the same results of precipitin bands...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28894510/antioxidant-and-anti-inflammatory-effects-of-shungite-against-ultraviolet-b-irradiation-induced-skin-damage-in-hairless-mice
#9
Ma Easter Joy Sajo, Cheol-Su Kim, Soo-Ki Kim, Kwang Yong Shim, Tae-Young Kang, Kyu-Jae Lee
As fullerene-based compound applications have been rapidly increasing in the health industry, the need of biomedical research is urgently in demand. While shungite is regarded as a natural source of fullerene, it remains poorly documented. Here, we explored the in vivo effects of shungite against ultraviolet B- (UVB-) induced skin damage by investigating the physiological skin parameters, immune-redox profiling, and oxidative stress molecular signaling. Toward this, mice were UVB-irradiated with 0.75 mW/cm(2) for two consecutive days...
2017: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/28893414/transcriptional-mediated-effects-of-radiation-on-the-expression-of-immune-susceptibility-markers-in-melanoma
#10
Lauryn R Werner, Jasdeep S Kler, Monica M Gressett, Maureen Riegert, Lindsey K Werner, Clinton M Heinze, Joseph G Kern, Mahyar Abbariki, Amy K Erbe, Ravi B Patel, Raghava N Sriramaneni, Paul M Harari, Zachary S Morris
BACKGROUND AND PURPOSE: We recently reported a time-sensitive, cooperative, anti-tumor effect elicited by radiation (RT) and intra-tumoral-immunocytokine injection in vivo. We hypothesized that RT triggers transcriptional-mediated changes in tumor expression of immune susceptibility markers at delayed time points, which may explain these previously observed time-dependent effects. MATERIALS AND METHODS: We examined the time course of changes in expression of immune susceptibility markers following in vitro or in vivo RT in B78 murine melanoma and A375 human melanoma using flow cytometry, immunoblotting, and qPCR...
September 8, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/28893272/killed-whole-hiv-vaccine-employing-a-well-established-strategy-for-antiviral-vaccines
#11
REVIEW
C Yong Kang, Yong Gao
The development of an efficient prophylactic HIV vaccine has been one of the major challenges in infectious disease research during the last three decades. Here, we present a mini review on strategies employed for the development of HIV vaccines with an emphasis on a well-established vaccine technology, the killed whole-virus vaccine approach. Recently, we reported an evaluation of the safety and the immunogenicity of a genetically modified and killed whole-HIV-1 vaccine designated as SAV001 [1]. HIV-1 Clade B NL4-3 was genetically modified by deleting the nef and vpu genes and substituting the coding sequence of the Env signal peptide with that of honeybee melittin to produce an avirulent and replication efficient HIV-1...
September 12, 2017: AIDS Research and Therapy
https://www.readbyqxmd.com/read/28878391/identification-of-a-p53-target-cd137l-that-mediates-growth-suppression-and-immune-response-of-osteosarcoma-cells
#12
Yusuke Tsuda, Chizu Tanikawa, Takafumi Miyamoto, Makoto Hirata, Varalee Yodsurang, Yao-Zhong Zhang, Seiya Imoto, Rui Yamaguchi, Satoru Miyano, Hiroshi Takayanagi, Hirotaka Kawano, Hidewaki Nakagawa, Sakae Tanaka, Koichi Matsuda
p53 encodes a transcription factor that transactivates downstream target genes involved in tumour suppression. Although osteosarcoma frequently has p53 mutations, the role of p53 in osteosarcomagenesis is not fully understood. To explore p53-target genes comprehensively in calvarial bone and find out novel druggable p53 target genes for osteosarcoma, we performed RNA sequencing using the calvarial bone and 23 other tissues from p53 (+/+) and p53 (-/-) mice after radiation exposure. Of 23,813 genes, 69 genes were induced more than two-fold in irradiated p53 (+/+) calvarial bone, and 127 genes were repressed...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28860231/ultraviolet-b-exposure-inhibits-angiotensin-ii-induced-abdominal-aortic-aneurysm-formation-in-mice-by-expanding-cd4-foxp3-regulatory-t-cells
#13
Tomohiro Hayashi, Naoto Sasaki, Tomoya Yamashita, Taiji Mizoguchi, Takuo Emoto, Hilman Zulkifli Amin, Keiko Yodoi, Takuya Matsumoto, Kazuyuki Kasahara, Naofumi Yoshida, Tokiko Tabata, Naoki Kitano, Atsushi Fukunaga, Chikako Nishigori, Yoshiyuki Rikitake, Ken-Ichi Hirata
BACKGROUND: Pathogenic immune responses are known to play an important role in abdominal aortic aneurysm (AAA) development. Ultraviolet B (UVB) irradiation has been demonstrated to have therapeutic potential not only for cutaneous diseases but also for systemic inflammatory diseases in mice by suppressing immunoinflammatory responses. We investigated the effect of UVB irradiation on experimental AAA. METHODS AND RESULTS: We used an angiotensin II-induced AAA model in apolipoprotein E-deficient mice fed a high-cholesterol diet...
August 31, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28858075/concurrent-radiotherapy-for-patients-with-metastatic-melanoma-and-receiving-anti-programmed-death-1-therapy-a-safe-and-effective-combination
#14
Amélie Aboudaram, Anouchka Modesto, Léonor Chaltiel, Carlos Gomez-Roca, Serge Boulinguez, Vincent Sibaud, Jean-Pierre Delord, Ciprian Chira, Martine Delannes, Elizabeth Moyal, Nicolas Meyer
A combination of immune-checkpoint inhibitors and radiation therapy (RT) represents a promising therapeutic strategy in part mediated by the abscopal effect, but clinical experience related to this combination remains scarce. Clinical data and patterns of treatment were retrospectively collected from all consecutive patients with metastatic melanoma and receiving programmed-death 1 (PD-1) immune-checkpoint inhibitors. Survival data, best overall response, and acute and delayed toxicities (graded according to Common Terminology Criteria for Adverse Events, v 4...
October 2017: Melanoma Research
https://www.readbyqxmd.com/read/28854279/transfer-of-in-vitro-expanded-na%C3%A3-ve-t-cells-after-lymphodepletion-enhances-antitumor-immunity-through-the-induction-of-polyclonal-antitumor-effector-t-cells
#15
Tomohiro Tanaka, Satoshi Watanabe, Miho Takahashi, Ko Sato, Yu Saida, Junko Baba, Masashi Arita, Miyuki Sato, Aya Ohtsubo, Satoshi Shoji, Koichiro Nozaki, Kosuke Ichikawa, Rie Kondo, Nobumasa Aoki, Yasuyoshi Ohshima, Takuro Sakagami, Tetsuya Abe, Hiroshi Moro, Toshiyuki Koya, Junta Tanaka, Hiroshi Kagamu, Hirohisa Yoshizawa, Toshiaki Kikuchi
The adoptive transfer of effector T cells combined with lymphodepletion has demonstrated promising antitumor effects in mice and humans, although the availability of tumor-specific T cells is limited. We and others have also demonstrated that the transfer of polyclonal naïve T cells induces tumor-specific effector T cells and enhances antitumor immunity after lymphodepletion. Because tumors have been demonstrated to induce immunosuppressive networks and regulate the function of T cells, obtaining a sufficient number of fully functional naïve T cells that are able to differentiate into tumor-specific effector T cells remains difficult...
2017: PloS One
https://www.readbyqxmd.com/read/28852268/mycobacterium-tuberculosis-multidrug-resistant-strain-m-induces-low-il-8-and-inhibits-tnf-%C3%AE-secretion-by-bronchial-epithelial-cells-altering-neutrophil-effector-functions
#16
Denise Kviatcovsky, Leonardo Rivadeneyra, Luciana Balboa, Noemí Yokobori, Beatriz López, Viviana Ritacco, Mirta Schattner, María Del Carmen Sasiain, Silvia de la Barrera
M strain, the most prevalent multidrug-resistant strain of Mycobacterium tuberculosis (Mtb) in Argentina, has mounted mechanisms to evade innate immune response. The role of human bronchial epithelium in Mtb infection remains unknown as well as its crosstalk with neutrophils (PMN). In this work, we evaluate whether M and H37Rv strains invade and replicate within bronchial epithelial cell line Calu-6 and how conditioned media (CM) derived from infected cells alter PMN responses. We demonstrated that M infects and survives within Calu-6 without promoting death...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28836991/modeling-dna%C3%A2-damage-induced-pneumopathy-in-mice-insight-from-danger-signaling-cascades
#17
REVIEW
Florian Wirsdörfer, Verena Jendrossek
Radiation-induced pneumonitis and fibrosis represent severe and dose-limiting side effects in the radiotherapy of thorax-associated neoplasms leading to decreased quality of life or - as a consequence of treatment with suboptimal radiation doses - to fatal outcomes by local recurrence or metastatic disease. It is assumed that the initial radiation-induced damage to the resident cells triggers a multifaceted damage-signalling cascade in irradiated normal tissues including a multifactorial secretory program. The resulting pro-inflammatory and pro-angiogenic microenvironment triggers a cascade of events that can lead within weeks to a pronounced lung inflammation (pneumonitis) or after months to excessive deposition of extracellular matrix molecules and tissue scarring (pulmonary fibrosis)...
August 24, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28829428/in-vitro-and-in-vivo-assessment-of-t-b-and-myeloid-cells-suppressive-activity-and-humoral-responses-from-transplant-recipients
#18
Séverine Bézie, Claire Usal, Carole Guillonneau
The main concern in transplantation is to achieve specific tolerance through induction of regulatory cells. The understanding of tolerance mechanisms requires reliable models. Here, we describe models of tolerance to cardiac allograft in rat, induced by blockade of costimulation signals or by upregulation of immunoregulatory molecules through gene transfer. Each of these models allowed in vivo generation of regulatory cells such as regulatory T cells (Tregs), regulatory B cells (Bregs) or regulatory myeloid cells (RegMCs)...
August 12, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28828581/optimizing-tumor-immune-response-through-combination-of-radiation-and-immunotherapy
#19
REVIEW
Alissar El Chediak, Ali Shamseddine, Larry Bodgi, Jean-Pierre Obeid, Fady Geara, Youssef H Zeidan
Radiation therapy and immunotherapy are two highly evolving modalities for the treatment of solid tumors. Immunotherapeutic drugs can either stimulate the immune system via immunogenic pathways or target co-inhibitory checkpoints. An augmented tumor cell recognition by host immune cells can be achieved post-irradiation, as irradiated tissues can release chemical signals which are sensed by the immune system resulting in its activation. Different strategies combining both treatment modalities were tested in order to achieve a better therapeutic response and longer tumor control...
August 21, 2017: Medical Oncology
https://www.readbyqxmd.com/read/28825807/photo-inspired-antibacterial-activity-and-wound-healing-acceleration-by-hydrogel-embedded-with-ag-ag-agcl-zno-nanostructures
#20
Congyang Mao, Yiming Xiang, Xiangmei Liu, Zhenduo Cui, Xianjin Yang, Kelvin Wai Kwok Yeung, Haobo Pan, Xianbao Wang, Paul K Chu, Shuilin Wu
Ag/Ag@AgCl/ZnO hybrid nanostructures are embedded in a hydrogel by a simple two-step technique. The Ag/Ag@AgCl nanostructures are assembled in the hydrogel via ultraviolet light chemical reduction followed by incorporation of ZnO nanostructures by NaOH precipitation. The hydrogel accelerates wound healing and exhibits high antibacterial efficiency against both Escherichia coli and Staphylococcus aureus under visible light irradiation. The Ag/Ag@AgCl nanostructures enhance the photocatalytic and antibacterial activity of ZnO due to the enhancement of reactive oxygen species by visible light...
August 24, 2017: ACS Nano
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