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https://www.readbyqxmd.com/read/29350904/nanoplatform-assembled-from-a-cd44-targeted-prodrug-and-smart-liposomes-for-dual-targeting-of-tumor-microenvironment-and-cancer-cells
#1
Yaqi Lv, Chaoran Xu, Xiangmei Zhao, Chenshi Lin, Xin Yang, Xiaofei Xin, Li Zhang, Chao Qin, Xiaopeng Han, Lei Yang, Wei He, Lifang Yin
The tumor microenvironment (TME) plays a critical role in tumor initiation, progression, invasion and metastasis. Therefore, a therapy that combines chemotherapeutic drugs with a TME modulator could be a promising route for cancer treatment. This paper reports a nanoplatform self-assembled from a hyaluronic acid (HA)-paclitaxel (PTX) (HA-PTX) prodrug and marimastat (MATT)-loaded thermosensitive liposomes (LTSLs) (MATT-LTSLs) for the dual targeting of the TME and cancer cells. Interestingly, the prodrug HA-PTX can self-assemble on both positively and negatively charged liposomes, forming hybrid nanoparticles (HNPs, 100 nm)...
January 19, 2018: ACS Nano
https://www.readbyqxmd.com/read/29346528/a-novel-stromal-lncrna-signature-reprograms-fibroblasts-to-promote-the-growth-of-oral-squamous-cell-carcinoma-via-lncrna-caf-interleukin-33
#2
Liang Ding, Jing Ren, Dongya Zhang, Yi Li, Xiaofeng Huang, Qingang Hu, Hui Wang, Yuxian Song, Yanhong Ni, Yayi Hou
Stromal carcinoma-related fibroblasts (CAFs) are the main type of non-immune cells in the tumor microenvironment (TME). CAFs interact with cancer cells to promote tumor proliferation. Long non-coding RNAs (lncRNAs) are known to regulate cell growth, apoptosis, and metastasis of cancer cells, but their role in stromal cells is unclear. Using RNA sequencing, we identified a stromal lncRNA signature during the transformation of CAFs from normal fibroblasts (NFs) in oral squamous cell carcinoma (OSCC). We uncovered an uncharacterized lncRNA, FLJ22447, which was remarkably up-regulated in CAFs, referred to LncRNA-CAF (Lnc-CAF) hereafter...
January 13, 2018: Carcinogenesis
https://www.readbyqxmd.com/read/29346265/halfway-between-2d-and-animal-models-are-3d-cultures-the-ideal-tool-to-study-cancer-microenvironment-interactions
#3
REVIEW
Jessica Hoarau-Véchot, Arash Rafii, Cyril Touboul, Jennifer Pasquier
An area that has come to be of tremendous interest in tumor research in the last decade is the role of the microenvironment in the biology of neoplastic diseases. The tumor microenvironment (TME) comprises various cells that are collectively important for normal tissue homeostasis as well as tumor progression or regression. Seminal studies have demonstrated the role of the dialogue between cancer cells (at many sites) and the cellular component of the microenvironment in tumor progression, metastasis, and resistance to treatment...
January 18, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29345636/promoting-the-accumulation-of-tumor-specific-t-cells-in-tumor-tissues-by-dendritic-cell-vaccines-and-chemokine-modulating-agents
#4
Nataša Obermajer, Julie Urban, Eva Wieckowski, Ravikumar Muthuswamy, Roshni Ravindranathan, David L Bartlett, Pawel Kalinski
This protocol describes how to induce large numbers of tumor-specific cytotoxic T cells (CTLs) in the spleens and lymph nodes of mice receiving dendritic cell (DC) vaccines and how to modulate tumor microenvironments (TMEs) to ensure effective homing of the vaccination-induced CTLs to tumor tissues. We also describe how to evaluate the numbers of tumor-specific CTLs within tumors. The protocol contains detailed information describing how to generate a specialized DC vaccine with augmented ability to induce tumor-specific CTLs...
February 2018: Nature Protocols
https://www.readbyqxmd.com/read/29340993/laparoscopic-assisted-modified-intersphincter-resection-for-ultralow-rectal-cancer
#5
Haiyang Zhou, Canping Ruan, Zhiguo Wang, Zhiqian Hu
BACKGROUND: Intersphincter resection (ISR) is considered to be a superior technique offering sphincter preservation in patients with ultralow rectal cancer.1 Because high-definition laparoscopy offers wider and clearer vision into the narrow pelvic cavity and intersphincteric space, ISR has been further refined.2 However, functional outcome after ISR has not been optimal. More than half of patients receiving ISR suffer partial or even complete anal incontinence.3 We therefore propose a laparoscopic-assisted modified ISR, with the aim of improving sphincter function following ISR...
January 16, 2018: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29334123/cancer-associated-fibroblasts-tailored-tumor-microenvironment-of-therapy-resistance-in-gastrointestinal-cancers
#6
REVIEW
Yeqi Sun, Ruifen Wang, Meng Qiao, Yanchun Xu, Wenbin Guan, Lifeng Wang
Gastrointestinal cancers (GI) are a group of highly aggressive malignancies with heavy cancer-related mortalities. Even if continued development of therapy methods, therapy resistance has been a great obstruction for cancer treatment and thereby inevitably leads to depressed final mortality. Peritumoral cancer associated fibroblasts (CAFs), a versatile population assisting cancer cells to build a facilitated tumor microenvironment (TME), has been demonstrated exerting a promotion influence on cancer proliferation, migration, invasion, metastasis and also therapy resistance...
January 15, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29331323/regulation-of-inflammatory-factors-by-double-stranded-rna-receptors-in-breast-cancer-cells
#7
Amritha Venkatesh, Harika Nandigam, Maria Muccioli, Manindra Singh, Tiffany Loftus, Deana Lewis, Michelle Pate, Fabian Benencia
Malignant cells are not the only components of a tumor mass since other cells (e.g., fibroblasts, infiltrating leukocytes and endothelial cells) are also part of it. In combination with the extracellular matrix, all these cells constitute the tumor microenvironment. In the last decade the role of the tumor microenvironment in cancer progression has gained increased attention and prompted efforts directed to abrogate its deleterious effects on anti-cancer therapies. The immune system can detect and attack tumor cells, and tumor-infiltrating lymphocytes (particularly CD8 T cells) have been associated with improved survival or better response to therapies in colorectal, melanoma, breast, prostate and ovarian cancer patients among others...
November 22, 2017: Immunobiology
https://www.readbyqxmd.com/read/29323193/rapid-thermal-processing-to-enhance-steel-toughness
#8
V K Judge, J G Speer, K D Clarke, K O Findley, A J Clarke
Quenching and Tempering (Q&T) has been utilized for decades to alter steel mechanical properties, particularly strength and toughness. While tempering typically increases toughness, a well-established phenomenon called tempered martensite embrittlement (TME) is known to occur during conventional Q&T. Here we show that short-time, rapid tempering can overcome TME to produce unprecedented property combinations that cannot be attained by conventional Q&T. Toughness is enhanced over 43% at a strength level of 1...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320425/targeting-pancreatic-cancer-cell-plasticity-the-latest-in-therapeutics
#9
REVIEW
Jacob M Smigiel, Neetha Parameswaran, Mark W Jackson
Mortality remains alarmingly high for patients diagnosed with pancreatic ductal adenocarcinoma (PDAC), with 93% succumbing to the disease within five years. The vast majority of PDAC cases are driven by activating mutations in the proto-oncogene KRAS, which results in constitutive proliferation and survival signaling. As efforts to target RAS and its downstream effectors continue, parallel research aimed at identifying novel targets is also needed in order to improve therapeutic options and efficacy. Recent studies demonstrate that self-renewing cancer stem cells (CSCs) contribute to metastatic dissemination and therapy failure, the causes of mortality from PDAC...
January 10, 2018: Cancers
https://www.readbyqxmd.com/read/29318551/analysis-of-invasive-activity-of-caf-spheroids-into-three-dimensional-3d-collagen-matrices
#10
María Ángeles Villaronga, Saúl Álvarez Teijeiro, Francisco Hermida-Prado, Marta Garzón-Arango, Victoria Sanz-Moreno, Juana María García-Pedrero
Tumor growth and progression is the result of a complex process controlled not only by malignant cancer cells but also by the surrounding tumor microenvironment (TME). Cancer associated fibroblasts (CAFs), the most abundant cellular component of TME, play an active role in tumor invasion and metastasis by promoting cancer cell invasion through cell-cell interactions and secretion of pro-invasive factors such as extracellular matrix (ECM)-degrading proteases. Due to their tumor-promoting activities, there is an emerging interest in investigating CAFs biology and its potential as drug targets for cancer therapies...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29316932/why-do-people-participate-in-mass-anti-malarial-administration-findings-from-a-qualitative-study-in-nong-district-savannakhet-province-lao-pdr-laos
#11
Bipin Adhikari, Koukeo Phommasone, Palingnaphone Kommarasy, Xayaphone Soundala, Phonesavanh Souvanthong, Tiengkham Pongvongsa, Gisela Henriques, Paul N Newton, Nicholas J White, Nicholas P J Day, Arjen M Dondorp, Lorenz von Seidlein, Mayfong Mayxay, Phaik Yeong Cheah, Christopher Pell
BACKGROUND: As a part of targeted malaria elimination (TME) in the Greater Mekong Sub-region (GMS), mass drug administration (MDA) with anti-malarials was conducted in four villages in Nong District, Savannakhet Province, Lao PDR (Laos). A high proportion of the target population participated in the MDA, with over 87% agreeing to take the anti-malarial. Drawing on qualitative data collected alongside the MDA, this article explores the factors that led to this high population coverage...
January 9, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29316129/anastomotic-leakage-after-side-to-end-anastomosis-for-rectal-cancer-does-leakage-location-matter
#12
Elisabeth Hain, Léon Maggiori, Magaly Zappa, Justine Prost À la Denise, Yves Panis
AIM: To assess outcome according to location of anastomotic leakage (AL) after side-to-end stapler or manual low colorectal or coloanal anastomosis following laparoscopic total mesorectal excision (TME) for rectal cancer. METHODS: All patients presenting with symptomatic or asymptomatic AL after TME and side-to-end low anastomosis for rectal cancer performed from 2005 to 2014 were identified from our prospective database. CT-scans with contrast enema were reviewed to assess location of AL origin...
January 6, 2018: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
https://www.readbyqxmd.com/read/29313396/the-role-of-tamis-transanal-minimally-invasive-surgery-in-the-management-of-advanced-rectal-cancer-one-shared-story-of-three-exceptional-cases
#13
Dimitrios Giannoulopoulos, Constantinos Nastos, Maria Gavriatopoulou, Antonios Vezakis, Dionysios Dellaportas, Ira Sotirova, Georgios Giokas, Georgios Polymeneas, Theodosios Theodosopoulos
PURPOSE OF THE STUDY: The current gold standard for contemporary treatment of rectal cancer is total mesorectal excision (TME), achieving excellent local disease control and low recurrence rates. However, TME may be associated with postoperative mortality and quality of life deterioration. Therefore, the need to develop less radical treatment strategies has emerged. Transanal minimally invasive surgery (TAMIS) is currently indicated only for early rectal cancer. However, local excision following chemoradiation has yielded promising clinical outcomes in selected cases with more advanced disease...
January 9, 2018: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/29305065/high-macrophage-pd-l1-expression-not-responsible-for-t-cell-suppression
#14
Naomi Goldman, Yelizavet D Lomakova, Jennifer Londregan, Amanda Bucknum, Kelley DePierri, John Somerville, James E Riggs
Tumors are often comprised of microenvironments (TMEs) with a high proportion of cells and molecules that regulate immunity. Peritoneal cavity (PerC) cell culture reproduces key features of TMEs as lymphocyte proliferation is suppressed by PerC macrophages (Mϕs). We monitored the expression of T cell stimulatory (Class II MHC, B7) and inhibitory (PD-L1) molecules by PerC APCs before and after culture and report here that IFNγ-driven PD-L1 expression increased markedly on PerC Mϕs after TCR ligation, even more so than seen with direct APC activation by LPS...
December 30, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/29301448/targeting-tumor-microenvironment-to-curb-chemoresistance-via-novel-drug-delivery-strategies
#15
Chintan Bhavsar, Munira Momin, Tabassum Khan, Abdelwahab Omri
A tumor is a heterogeneous mass of malignant cells that co-exists with non-malignant cells. The co-existence evolves from the initial developmental stages of the tumor and is one of the hallmarks of cancer. The presence of non-malignant cells provides a pro-tumorigenic niche known as the tumor microenvironment (TME). Proliferation, invasiveness, metastatic potential and maintenance of stemness through cross-talk between tumors and tumor associated stromal cells (TASCs) forms the basis of TME. Areas covered: The article highlights the developmental phases of a tumor from dysplasia to an invasive condition leading to formation of clinically detectable tumors...
January 4, 2018: Expert Opinion on Drug Delivery
https://www.readbyqxmd.com/read/29289420/exosome-and-mesenchymal-stem-cell-cross-talk-in-the-tumor-microenvironment
#16
REVIEW
Theresa L Whiteside
Mesenchymal stem cells (MSCs) are a major component of the tumor microenvironment (TME) and play a key role in promoting tumor progression. The tumor uses exosomes to co-opt MSCs and re-program their functional profile from normally trophic to pro-tumorigenic. These tumor-derived small vesicles called "TEX" carry and deliver a cargo rich in proteins and nucleic acids to MSCs. Upon interactions with surface receptors on MSCs and uptake of the exosome cargo by MSCs, molecular, transcriptional and translational changes occur that convert MSCs into producers of factors that are necessary for tumor growth and that also alter functions of non-tumor cells in the TME...
December 27, 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/29288615/synchronous-locally-advanced-rectal-cancer-with-clinical-complete-remission-and-important-downstaging-after-neoadjuvant-radiochemotherapy-personalised-therapeutic-approach
#17
Dragoş Eugen Georgescu, Mihai Teodor Georgescu, Florin Teodor Bobircă, Teodor Florin Georgescu, Horia Doran, Traian Pătraşcu
Introduction: The current practice for patients with good response, important downstaging or complete remission after preoperative chemoradiation, is to perform surgery on the basis of initial pretherapeutical staging. In literature, varying approaches, like transanal endoscopic microsurgery and even "wait and see", are described for patients with good response after chemoradiation. However, considering the present level of available evidence, the wide-spread adoption of a "watch and wait" policy in those achieving a complete clinical remission cannot be justified...
November 2017: Chirurgia
https://www.readbyqxmd.com/read/29288190/can-we-save-the-rectum-by-watchful-waiting-or-transanal-microsurgery-following-chemo-radiotherapy-versus-total-mesorectal-excision-for-early-rectal-cancer-star-trec-study-protocol-for-a-multicentre-randomised-feasibility-study
#18
Anouk J M Rombouts, Issam Al-Najami, Natalie L Abbott, Ane Appelt, Gunnar Baatrup, Simon Bach, Aneel Bhangu, Karen-Lise Garm Spindler, Richard Gray, Kelly Handley, Manjinder Kaur, Ellen Kerkhof, Camilla Jensenius Kronborg, Laura Magill, Corrie A M Marijnen, Iris D Nagtegaal, Lars Nyvang, Femke P Peters, Per Pfeiffer, Cornelis Punt, Philip Quirke, David Sebag-Montefiore, Mark Teo, Nick West, Johannes H W de Wilt
INTRODUCTION: Total mesorectal excision (TME) is the highly effective standard treatment for rectal cancer but is associated with significant morbidity and may be overtreatment for low-risk cancers. This study is designed to determine the feasibility of international recruitment in a study comparing organ-saving approaches versus standard TME surgery. METHODS AND ANALYSIS: STAR-TREC trial is a multicentre international randomised, three-arm parallel, phase II feasibility study in patients with biopsy-proven adenocarcinoma of the rectum...
December 28, 2017: BMJ Open
https://www.readbyqxmd.com/read/29288043/tumor-associated-macrophages-and-the-tumor-immune-microenvironment-of-primary-and-recurrent-epithelial-ovarian-cancer-eoc
#19
Laureen S Ojalvo, Elizabeth D Thompson, Tian-Li Wang, Alan K Meeker, Ie-Ming Shih, Amanda N Fader, Ashley M Cimino-Mathews, Leisha A Emens
Tumor infiltrating lymphocytes (TILs) are associated with better prognosis in newly diagnosed epithelial ovarian cancer (EOC), but clinical trials of immunotherapies in patients with heavily-treated disease reveal limited activity. Understanding the tumor microenvironment (TME) of primary and recurrent EOC should guide future trials. Here, we evaluated the TME of paired primary and recurrent tumors (n=17), and non-paired primary (n=20) and recurrent (n=15) tumors, for CD8+ T cells, FOXP3+ regulatory T cells (Tregs), CD68+ tumor-associated macrophages (TAMs), programmed cell death protein 1 (PD-1) and programmed cell death ligand 1 (PD-L1)...
December 26, 2017: Human Pathology
https://www.readbyqxmd.com/read/29283221/tumor-microenvironment-enabled-nanotherapy
#20
REVIEW
Liying Wang, Minfeng Huo, Yu Chen, Jianlin Shi
Cancer is now one of the world's leading threats to human health. With the development of oncology in both biology and biomedicine, it has been demonstrated that abnormal physiochemical conditions and dysregulated biosynthetic intermediates in tumor microenvironment (TME) play a pivotal role in enabling tumor cells to defend or evade the damage by traditional clinical tumor therapeutics including surgery, chemotherapy, radiotherapy, etc. The fast advances of TME-enabled theranostic nanomedicine have offered promising perspectives, strategies, and approaches for combating cancer based on the novel concept of TME-enabled nanotherapy...
December 28, 2017: Advanced Healthcare Materials
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