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https://www.readbyqxmd.com/read/28615524/interleukin-15-stimulates-natural-killer-cell-mediated-killing-of-both-human-pancreatic-cancer-and-stellate-cells
#1
Jonas R M Van Audenaerde, Jorrit De Waele, Elly Marcq, Jinthe Van Loenhout, Eva Lion, Johan M J Van den Bergh, Ralf Jesenofsky, Atsushi Masamune, Geert Roeyen, Patrick Pauwels, Filip Lardon, Marc Peeters, Evelien L J Smits
Pancreatic ductal adenocarcinoma (PDAC) is the 4th leading cause of cancer-related death in Western countries with a 5-year survival rate below 5%. One of the hallmarks of this cancer is the strong desmoplastic reaction within the tumor microenvironment (TME), orchestrated by activated pancreatic stellate cells (PSC). This results in a functional and mechanical shield which causes resistance to conventional therapies. Aiming to overcome this resistance by tackling the stromal shield, we assessed for the first time the capacity of IL-15 stimulated natural killer (NK) cells to kill PSC and pancreatic cancer cells (PCC)...
May 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28614625/modified-sentinel-lymph-node-technique-combined-with-endoluminal-loco-regional-resection-for-the-treatment-of-rectal-tumors-a-fourteen-year-experience
#2
Silvia Quaresima, Alessandro M Paganini, Giancarlo D'Ambrosio, Pietro Ursi, Andrea Balla, Emanuele Lezoche
AIM: After Endoluminal Loco-Regional Resection (ELRR) by Transanal Endoscopic Microsurgey (TEM) the N parameter may remain undefined. Nucleotide-Guided Mesorectal Excision (NGME) improves the lymph nodes harvest. The aim of the present study is to evaluate the long term oncological results after ELRR with NGME. METHOD: A total of 57 patients were enrolled over the period January 2001 to June 2015.ed. All patients underwent ELRR by TEM. Prior to surgery, 99m-Technetium-marked nanocolloid was injected in the peritumoral submucosa...
June 14, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/28609459/het0016-decreases-lung-metastasis-from-breast-cancer-in-immune-competent-mouse-model
#3
Thaiz F Borin, Adarsh Shankar, Kartik Angara, Mohammad H Rashid, Meenu Jain, Asm Iskander, Roxan Ara, Iryna Lebedyeva, Hasan Korkaya, Bhagelu R Achyut, Ali S Arbab
Distant metastasis is the primary cause of death in the majority of the cancer types. Recently, much importance has been given to tumor microenvironment (TME) in the development of invasive malignant tumors, as well as the metastasis potential. The ability of tumor cells to modulate TME and to escape immune-mediated attack by releasing immunosuppressive cytokines has become a hallmark of breast cancer. Our study shows the effect of IV formulation of HET0016 (HPßCD-HET0016) a selective inhibitor of 20-HETE synthesis, administered intravenously in immune-competent in vivo mouse model of murine breast cancer...
2017: PloS One
https://www.readbyqxmd.com/read/28605656/metabolism-shapes-the-tumor-microenvironment
#4
REVIEW
Miguel Reina-Campos, Jorge Moscat, Maria Diaz-Meco
Tumors are strongly influenced by the surrounding normal tissue, which forms a specialized niche termed the tumor microenvironment (TME). The TME is modeled by cancer cells for their own benefit through a complex array of interactions. The identification of new forms of communication within the TME, which are dependent on the tumor's metabolic activity, has expanded our understanding of this heterocellular regulation and has revealed potential therapeutic targets. This review will summarize recent findings on the metabolic regulation of tumor cells by the TME...
June 9, 2017: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/28603527/intratumoral-foxp3-helios-regulatory-t-cells-upregulating-immunosuppressive-molecules-are-expanded-in-human-colorectal-cancer
#5
Azharuddin Sajid Syed Khaja, Salman M Toor, Haytham El Salhat, Bassam R Ali, Eyad Elkord
Regulatory T cells (Tregs) can be antitumorigenic or pro-tumorigenic in colorectal cancer (CRC) depending on the presence of different Treg subsets with various immunosuppressive molecules. Some studies reported the phenotypic characteristics of tumor-infiltrating immune cells in CRC, but limited studies have focused on the co-expression of suppressive molecules on immune cells. The aim of this study was to characterize immune cells in the tumor microenvironment (TME), compared to paired adjacent non-tumor colon tissue of CRC patients...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28602029/the-prognostic-impact-of-programmed-cell-death-ligand-1-and-human-leukocyte-antigen-class-i-in-pancreatic-cancer
#6
Daisuke Imai, Tomoharu Yoshizumi, Shinji Okano, Hideaki Uchiyama, Toru Ikegami, Norifumi Harimoto, Shinji Itoh, Yuji Soejima, Shinichi Aishima, Yoshinao Oda, Yoshihiko Maehara
Pancreatic ductal adenocarcinoma (PDA) is associated with an immunosuppressive tumor-microenvironment (TME) that supports the growth of tumors and mediates tumors enabling evasion of the immune system. Expression of programmed cell death ligand 1 (PD-L1) and loss of human leukocyte antigen (HLA) class I on tumor cells are methods by which tumors escape immunosurveillance. We examined immune cell infiltration, the expression of PD-L1 and HLA class I by PDA cells, and the correlation between these immunological factors and clinical prognosis...
June 10, 2017: Cancer Medicine
https://www.readbyqxmd.com/read/28586517/extracellular-vesicles-in-the-tumor-microenvironment-therapeutic-resistance-clinical-biomarkers-and-targeting-strategies
#7
REVIEW
L Han, J Xu, Q Xu, B Zhang, E W-F Lam, Y Sun
Numerous studies have proved that cell-nonautonomous regulation of neoplastic cells is a distinctive and essential characteristic of tumorigenesis. Two way communications between the tumor and the stroma, or within the tumor significantly influence disease progression and modify treatment responses. In the tumor microenvironment (TME), malignant cells utilize paracrine signaling initiated by adjacent stromal cells to acquire resistance against multiple types of anticancer therapies, wherein extracellular vesicles (EVs) substantially promote such events...
June 6, 2017: Medicinal Research Reviews
https://www.readbyqxmd.com/read/28583790/transanal-endoscopic-microsurgery-after-neoadjuvant-radiochemotherapy-for-locally-advanced-extraperitoneal-rectal-cancer
#8
G Rizzo, G Zaccone, M Magnocavallo, C Mattana, D P Pafundi, M A Gambacorta, V Valentini, C Coco
PURPOSE: The aim of this study is to provide a prospective analysis of post-operative and oncological outcomes in patients affected by locally advanced rectal cancer (LARC), who obtained a major/complete clinical response after pre-operative radio-chemotherapy (RCT) and were treated with local excision (LE) by trans-anal endoscopic microsurgery (TEM) to confirm a pathological complete response (pCR) after to neo-adjuvant RCT. METHODS: All patients with LARC treated by pre-operative RCT and full-thickness LE by TEM (2000-2014) were included in the study...
May 25, 2017: European Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28583651/dual-energy-ct-can-detect-malignant-lymph-nodes-in-rectal-cancer
#9
I Al-Najami, M J Lahaye, R G H Beets-Tan, G Baatrup
BACKGROUND: There is a need for an accurate and operator independent method to assess the lymph node status to provide the most optimal personalized treatment for rectal cancer patients. This study evaluates whether Dual Energy Computed Tomography (DECT) could contribute to the preoperative lymph node assessment, and compared it to Magnetic Resonance Imaging (MRI). The objective of this prospective observational feasibility study was to determine the clinical value of the DECT for the detection of metastases in the pelvic lymph nodes of rectal cancer patients and compare the findings to MRI and histopathology...
May 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28581407/continuous-effect-of-radial-resection-margin-on-recurrence-and-survival-in-rectal-cancer-patients-who-receive-preoperative-chemoradiation-and-curative-surgery-a-multicenter-retrospective-analysis
#10
SooYoon Sung, Sung Hwan Kim, Joo Hwan Lee, Taek Keun Nam, Songmi Jeong, Hong Seok Jang, Jin Ho Song, Jeong Won Lee, Jung Min Bae, Jong Hoon Lee
PURPOSE: To elucidate the proper length and prognostic value of resection margins in rectal cancer patients who received preoperative chemoradiotherapy (CRT) followed by curative total mesorectal excision (TME). METHODS AND MATERIALS: A total of 1476 rectal cancer patients staging cT3-4N0-2M0 were analyzed. All patients received radiation dose of 50.4 Gy in 28 fractions with concurrent 5-fluorouracil or capecitabine. Total mesorectal excision was performed 4 to 8 weeks after radiation therapy...
July 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28577085/endoplasmic-reticulum-stress-regulates-tumor-growth-and-anti-tumor-immunity-a-promising-opportunity-for-cancer-immunotherapy
#11
REVIEW
Eslam Mohamed, Yu Cao, Paulo C Rodriguez
The endoplasmic reticulum (ER) stress is a cellular process that occurs as a consequence of several stress circumstances, such as the accumulation of unfolded proteins in the lumen of the ER or distinct insults that disturb the ER normal function. Different conditions in the tumor microenvironment (TME), including hypoxia, nutrient deprivation, and the elevated production of reactive oxygen and nitrogen species destabilize the loading and dispatching of the newly synthesized proteins, triggering ER stress in cancer cells and tumor-infiltrating leukocytes...
June 2, 2017: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/28576927/overcoming-the-immunosuppressive-tumor-microenvironment-of-hodgkin-lymphoma-using-chimeric-antigen-receptor-t-cells
#12
Marco Ruella, Michael Klichinsky, Saad S Kenderian, Olga Shestova, Amy Ziober, Daniel O Kraft, Michael Feldman, Mariusz A Wasik, Carl H June, Saar Gill
Some patients with otherwise treatment-resistant Hodgkin lymphoma (HL) could benefit from chimeric antigen receptor T cell (CART) therapy. However, HL lacks CD19 and contains a highly immunosuppressive tumor microenvironment (TME). We hypothesized that in HL, CART should target both malignant cells and the TME. We demonstrated CD123 on both HL cells and TME, including tumor-associated macrophages (TAM). In vitro, HL cells convert macrophages towards immunosuppressive TAM that inhibit T cell proliferation. In contrast, anti-CD123 CART recognized and killed TAM thus overcoming immunosuppression...
June 2, 2017: Cancer Discovery
https://www.readbyqxmd.com/read/28574616/the-therapeutic-potential-of-targeting-tumor-microenvironment-in-breast-cancer-rational-strategies-and-recent-progress
#13
Afsane Bahrami, Seyed Mahdi Hassanian, Majid Khazaei, Malihe Hasanzadeh, Soodabeh Shahidsales, Mina Maftouh, Gordon A Ferns, Amir Avan
The tumor microenvironment (TME) is cellular environment in addition to harboring carcinoma cells, consists of different components (e.g., blood vessels, immune cells, fibroblasts, bone marrow-derived inflammatory cells, lymphocytes, signaling molecules and the extracellular matrix) that have an essential role on drug activity and efficacy. There is growing body of evidence showing its involvement in the progression and metastasis of different cancers, including breast cancer. These observations provide a proof of concept of targeting tumor microenvironment compartments as a novel potential therapeutic approach in treatment of this malignancy, which is the main interested for current review...
June 2, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28571800/the-length-and-complexity-of-mesentery-are-related-to-the-locoregional-recurrence-of-the-carcinoma-in-gut
#14
Jie Shen, Daxing Xie, Yixin Tong, Jianping Gong
Local-regional relapse is the main recurrence pattern of the carcinoma in gut, and leads to poor prognosis. With the development of the total mesorectal and complete mesocolic excision (TME/CME), the local relapse rate of colorectal cancer has significantly decreased. People attributed it to the improvement of lymphadenectomy, but lymphatic metastasis is difficult to explain the local relapse in N0 patients. Previously, we have proven the existence of "Metastasis V" in mesogastrium and mesocolorectum, and supposed that it is one of the major risk factors in local recurrence...
June 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28571003/bptf-inhibits-nk-cell-activity-and-the-abundance-of-natural-cytotoxicity-receptor-co-ligands
#15
Kimberly Mayes, Zeinab Elsayed, Aiman Alhazmi, Michael Waters, Suehyb G Alkhatib, Mark Roberts, Carolyn Song, Kristen Peterson, Vivian Chan, Nikhil Ailaney, Pumoli Malapati, Tana Blevins, Berislav LisniÄ, Catherine I Dumur, Joseph W Landry
Using syngeneic BALB/c mouse breast cancer models, we show that the chromatin remodeling subunit bromodomain PHD finger transcription factor (BPTF) suppresses natural killer (NK) cell antitumor activity in the tumor microenvironment (TME). In culture, BPTF suppresses direct natural cytotoxicity receptor (NCR) mediated NK cell cytolytic activity to mouse and human cancer cell lines, demonstrating conserved functions. Blocking mouse NCR1 in vivo rescues BPTF KD tumor weights, demonstrating its importance for the control of tumor growth...
May 12, 2017: Oncotarget
https://www.readbyqxmd.com/read/28569410/pd-1-and-pd-l1-in-neoplastic-cells-and-the-tumor-microenvironment-of-merkel-cell-carcinoma
#16
C Mitteldorf, A Berisha, M Tronnier, M C Pfaltz, W Kempf
BACKGROUND: Merkel cell carcinoma (MCC) is an aggressive neoplasm, which is often associated with Merkel cell polyomavirus (MCPyV). PD-1 and PD-L1 are key players of the tumor microenvironment (TME). METHODS: 14 paraffin-embedded tissue samples of MCC were stratified by their MCPyV detection. Apart from PD-L1 and PD-1, the TME was further characterized for the expression of CD33, FOXP3 and MxA. RESULTS: We observed PD-1 in 2/12 tumors. PD-L1 expression by tumor cells was found in 7/8 MCPyV(+) samples and was detected particularly in the periphery...
June 1, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28567545/host-genetic-modifiers-of-nonproductive-angiogenesis-inhibit-breast-cancer
#17
Michael J Flister, Shirng-Wern Tsaih, Alexander Stoddard, Cody Plasterer, Jaidip Jagtap, Abdul K Parchur, Gayatri Sharma, Anthony R Prisco, Angela Lemke, Dana Murphy, Mona Al-Gizawiy, Michael Straza, Sophia Ran, Aron M Geurts, Melinda R Dwinell, Andrew S Greene, Carmen Bergom, Peter S LaViolette, Amit Joshi
PURPOSE: Multiple aspects of the tumor microenvironment (TME) impact breast cancer, yet the genetic modifiers of the TME are largely unknown, including those that modify tumor vascular formation and function. METHODS: To discover host TME modifiers, we developed a system called the Consomic/Congenic Xenograft Model (CXM). In CXM, human breast cancer cells are orthotopically implanted into genetically engineered consomic xenograft host strains that are derived from two parental strains with different susceptibilities to breast cancer...
May 31, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28560481/fluorescence-to-highlight-the-urethra-a-human-cadaveric-study
#18
T G Barnes, M Penna, R Hompes, C Cunningham
BACKGROUND: Urethral injury is a complication feared by surgeons performing transanal TME (TaTME) or abdominoperineal excision (APE) procedures. Injury during TaTME occurs when the prostate is inadvertently mobilised or as a direct injury similar to the direct injury during the perineal dissection of APE procedures. We performed a proof of principle study to assess the feasibility of using indocyanine green (ICG) to fluoresce the urethra in human cadavers. METHODS: Indocyanine green at varying doses was mixed with Instillagel and infiltrated into the urethra of male human cadavers...
May 30, 2017: Techniques in Coloproctology
https://www.readbyqxmd.com/read/28559898/silencing-of-soybean-raffinose-synthase-gene-reduced-raffinose-family-oligosaccharides-and-increased-true-metabolizable-energy-of-poultry-feed
#19
Michelle F Valentine, Joann R De Tar, Muruganantham Mookkan, Jeffre D Firman, Zhanyuan J Zhang
Soybean [Glycine max (L.) Merr.] is the number one oil and protein crop in the United States, but the seed contains several anti-nutritional factors that are toxic to both humans and livestock. RNA interference technology has become an increasingly popular technique in gene silencing because it allows for both temporal and spatial targeting of specific genes. The objective of this research is to use RNA-mediated gene silencing to down-regulate the soybean gene raffinose synthase 2 (RS2), to reduce total raffinose content in mature seed...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28558284/characterization-of-pm2-5-exposure-concentration-in-transport-microenvironments-using-portable-monitors
#20
Zhiyuan Li, Wenwei Che, H Christopher Frey, Alexis K H Lau, Changqing Lin
Recently, portable monitors have been increasingly used to quantify air pollutant concentrations at high spatiotemporal resolution. A sampling campaign was conducted to measure the fine particulate matter (PM2.5) and carbon monoxide (CO) exposure concentrations in transport microenvironments (TMEs) in Hong Kong in January and June 2015 using TSI DustTrak and Q-Trak portable monitors. The objectives were to: (1) calibrate DustTrak and Q-Trak; (2) evaluate variability between seasons and microenvironments; (3) estimate indoor/outdoor relationships; and (4) determine minimum sample size...
May 27, 2017: Environmental Pollution
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