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Tumor vessel normalization

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https://www.readbyqxmd.com/read/28643319/-progress-of-the-application-of-optical-coherence-tomography-in-gastrointestinal-tumor-surgery
#1
Yongsheng Li, Hao Liu, Haipeng Huang, Yu Zhu, Haijun Deng, Jiang Yu, Site Luo, Li Huo, Li Lin, Huikai Xie, Guoxin Li
Optical coherence tomography (OCT) is a real-time, cross-sectional optical imaging technology. It is analogous to ultrasonography, except that OCT uses light waves instead of sound waves, and can provide three-dimensional morphological images of living tissues with a micrometer resolution. Through the use of endoscopes, needles, catheters and laparoscopes, OCT has demonstrated tremendous imaging potential in tumor surgery. The current studies suggest that OCT has potential for clinical applications in the following fields of gastrointestinal tumor surgery: (1) Early tumor detection and diagnosis: OCT can distinguish differences between polyp tissue, normal tissue and malignant tissue...
June 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28619756/alpha-particle-enhanced-blood-brain-tumor-barrier-permeabilization-in-glioblastomas-using-integrin-alpha-v-beta-3-targeted-liposomes
#2
Anirudh Sattiraju, Xiaobing Xiong, Darpan N Pandya, Thaddeus J Wadas, Ang Xuan, Yao Sun, Youngkyoo Jung, Kiran Kumar Solingapuram Sai, Jay F Dorsey, King C Li, Akiva Mintz
<span style="font-size: 11.0pt; line-height: 200%; color: windowtext;">Glioblastoma (GBM) is the most common primary malignant astrocytoma characterized by extensive invasion, angiogenesis, hypoxia and micrometastasis. Despite the relatively leaky nature of GBM blood vessels, effective delivery of anti-tumor therapeutics has been a major challenge due to the complications caused by the blood brain barrier (BBB) and the highly torturous nature of newly formed tumor vasculature (blood tumor barrier-BTB)...
June 15, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28617447/targeting-the-vasculature-in-hepatocellular-carcinoma-treatment-starving-versus-normalizing-blood-supply
#3
Ken Liu, Xiang Zhang, Weiqi Xu, Jinbiao Chen, Jun Yu, Jennifer R Gamble, Geoffrey W McCaughan
Traditional treatments for intermediate or advanced stage hepatocellular carcinoma (HCC) such as transarterial chemoembolization (TACE) and anti-angiogenesis therapies were developed to starve tumor blood supply. A new approach of normalizing structurally and functionally abnormal tumor vasculature is emerging. While TACE improves survival in selected patients, the resulting tumor hypoxia stimulates proliferation, angiogenesis, treatment resistance and metastasis, which limits its overall efficacy. Vessel normalization decreases hypoxia and improves anti-tumor immune infiltrate and drug delivery...
June 15, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28604702/isdot-in-situ-decellularization-of-tissues-for-high-resolution-imaging-and-proteomic-analysis-of-native-extracellular-matrix
#4
Alejandro E Mayorca-Guiliani, Chris D Madsen, Thomas R Cox, Edward R Horton, Freja A Venning, Janine T Erler
The extracellular matrix (ECM) is a master regulator of cellular phenotype and behavior. It has a crucial role in both normal tissue homeostasis and disease pathology. Here we present a fast and efficient approach to enhance the study of ECM composition and structure. Termed in situ decellularization of tissues (ISDoT), it allows whole organs to be decellularized, leaving native ECM architecture intact. These three-dimensional decellularized tissues can be studied using high-resolution fluorescence and second harmonic imaging, and can be used for quantitative proteomic interrogation of the ECM...
June 12, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28603045/arctigenin-improves-vascular-tone-and-decreases-inflammation-in-human-saphenous-vein
#5
Armond Daci, Burim Neziri, Shaip Krasniqi, Raif Cavolli, Rame Alaj, Giuseppe Danilo Norata, Giangiacomo Beretta
The goal of this study was to test the effects of bioactive phenylpropanoid dibenzylbutyrolactone lignan arctigenin (ATG) in vascular tone. Human bypass graft vessel, from a saphenous vein (SV), were set up in organ bath system and contracted with potassium chloride (KCl, 40mM). Two concentration-response curves of noradrenaline (NE) (10nM-100μM) separated with an incubation period of 30min without (Control) or with ATG (3-100μM) were established. Inhibitors of nitric oxide, prostaglandins, K(+) related channels or calcium influx were used to delineate the molecular mechanisms beyond ATG effects...
June 8, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28602979/inhibition-of-cyp4a-by-a-novel-flavonoid-fla-16-prolongs-survival-and-normalizes-tumor-vasculature-in-glioma
#6
Chenlong Wang, Ying Li, Honglei Chen, Jie Zhang, Jing Zhang, Tian Qin, Chenfan Duan, Xuewei Chen, Yanzhuo Liu, Xiaoyang Zhou, Jing Yang
Glioblastomas rapidly become refractory to anti-VEGF therapies. We previously showed that cytochrome P450 (CYP) 4A-derived 20-hydroxyeicosatetraenoic acid (20-HETE) promotes angiogenesis. Here, we tested whether a novel flavonoid (FLA-16) prolongs survival and normalizes tumor vasculature in glioma through CYP4A inhibition. FLA-16 improved survival, reduced tumor burden, and normalized vasculature, accompanied with the decreased secretion of 20-HETE, VEGF and TGF-β in tumor-associated macrophages (TAMs) and endothelial progenitor cells (EPCs) in C6 and U87 gliomas...
June 7, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28583823/regulator-of-calcineurin-1-gene-isoform-4-downregulated-in-hepatocellular-carcinoma-prevents-proliferation-migration-and-invasive-activity-of-cancer-cells-and-growth-of-orthotopic-tumors-by-inhibiting-nuclear-translocation-of-nfat1
#7
Haojie Jin, Cun Wang, Guangzhi Jin, Haoyu Ruan, Dishui Gu, Lin Wei, Hui Wang, Ning Wang, Einthavy Arunachalam, Yurong Zhang, Xuan Deng, Chen Yang, Yi Xiong, Hugang Feng, Ming Yao, Jingyuan Fang, Jianren Gu, Wenming Cong, Wenxin Qin
BACKGROUND & AIMS: Individuals with Down syndrome have a low risk for many solid tumors, prompting the search for tumor suppressor genes on human chromosome 21 (HSA21). We aimed to identify and explore potential mechanisms of suppressors on HSA21 in hepatocellular carcinoma (HCC). METHODS: We compared expression of HSA21 genes in 14 pairs of primary HCC and adjacent noncancer liver tissue using the Affymetrix HG-U133 Plus 2.0 array. HCC tissues and adjacent normal liver tissues were collected from 108 patients at a hospital in China for real-time PCR and immunohistochemical analyses; expression levels of regulator of calcineurin 1 (RCAN1) isoform 4 (RCAN1...
June 2, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28576715/thermo-sensitive-polypeptide-hydrogel-for-locally-sequential-delivery-of-two-pronged-antitumor-drugs
#8
Lingyu Wei, Jinjin Chen, Shuhua Zhao, Jianxun Ding, Xuesi Chen
In the synergistic treatment with cytotoxic drug and vascular disrupting agent, the order of drug release shows great importance to enhance the antitumor efficacy. When vascular disrupting agent is firstly administrated, the reduced blood supply and overexpressed hypoxia-inducible factor-1α greatly limit the efficiency of chemotherapy. In this work, an injectable thermo-sensitive polypeptide hydrogel was firstly developed for the locally sequential delivery of hydrophilic doxorubicin (DOX, a cytotoxic agent) and hydrophobic combretastatin A4 (CA4, a vascular disrupting drug)...
May 30, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28569117/testicular-ultrasensitive-doppler-preliminary-experience-a-feasibility-study
#9
Laurence Rocher, Jean-Luc Gennisson, Sophie Ferlicot, Aline Criton, Laurence Albiges, Vincent Izard, Marie France Bellin, Jean-Michel Correas
Background Ultrasensitive Doppler is a novel non-invasive ultrasound (US) Doppler technique that improves sensitivity and resolution for the detection of slow flow. Purpose To investigate the feasibility of ultrasensitive Doppler (USD) for testicular disease diagnosis, using both qualitative and quantitative results. Material and Methods This prospective study was conducted in 160 successive men referred for scrotal US including B-mode and conventional Color-Doppler. A new USD sequence and algorithm dedicated to academic research were implemented into the US system...
January 1, 2017: Acta Radiologica
https://www.readbyqxmd.com/read/28544932/vascular-homing-peptides-for-cancer-therapy
#10
REVIEW
Lan Lu, Huan Qi, Jie Zhu, Wen Xia Sun, Bin Zhang, Chun Yan Tang, Qiang Cheng
In the past 30 years, a variety of phage libraries have been extensively utilized to identify and develop tumor homing peptides (THPs). THPs specifically bind to tumor cells or elements of the tumor microenvironment while no or low affinity to normal cells. In this regard, the efficacy of therapeutic agents in cancer therapy can be enhanced by targeting strategies based on coupling with THPs that recognize receptors expressed by tumor cells or tumor vasculature. Especially, vascular-homing peptides, targeting tumor vasculature, have their receptors expressed on or around the blood vessel including pro-angiogenic factors, metalloproteinase, integrins, fibrin-fibronectin complexes, etc...
May 22, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28544068/interstitial-fluid-pressure-a-novel-biomarker-to-monitor-photo-induced-drug-uptake-in-tumor-and-normal-tissues
#11
Sabrina Cavin, Xingyu Wang, Matthieu Zellweger, Michel Gonzalez, Michaël Bensimon, Georges Wagnières, Thorsten Krueger, Hans-Beat Ris, Fabrizio Gronchi, Jean Y Perentes
BACKGROUND: Low-dose photodynamic therapy PDT (photoinduction) can modulate tumor vessels and enhance the uptake of liposomal cisplatin (Lipoplatin®) in pleural malignancies. However, the photo-induction conditions must be tightly controlled as overtreatment shuts down tumor vessels and enhances normal tissue drug uptake. MATERIAL AND METHODS: In a pleural sarcoma and adenocarcinoma rat model (n = 12/group), we applied photoinduction (0.0625 mg/kg Visudyne®, 10 J/cm(2) ) followed by intravenous Lipoplatin® (5 mg/kg) administration...
May 22, 2017: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/28527400/effects-of-combretastatin-a-4-phosphate-on-canine-normal-and-tumor-tissue-derived-endothelial-cells
#12
Yusuke Izumi, Keisuke Aoshima, Yuki Hoshino, Satoshi Takagi
Combretastatin A-4 phosphate (CA4P) selectively blocks tumor blood flow. However, the detailed mechanisms through which CA4P specifically affects tumor blood vessels are not well understood. Recent reports revealed that tumor tissue-derived endothelial cells (TECs) have various specific features in comparison with normal tissue-derived endothelial cells (NECs). Thus, abnormalities in TECs may be involved in the selective vascular blockade mechanism of CA4P. In this study, we evaluated the effects of CA4P on canine NECs and TECs using confocal microscopy...
May 13, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28514684/cd4-t-cell-activation-and-vascular-normalization-two-sides-of-the-same-coin
#13
Michele De Palma, Rakesh K Jain
Normalization of tumor blood vessels enhances the infiltration and functions of T cells. Tian et al. (2017) report that effector CD4(+) T cells, in turn, support vascular normalization, highlighting intertwined roles for blood vessels and T cells in cancer.
May 16, 2017: Immunity
https://www.readbyqxmd.com/read/28511237/performance-of-a-fully-disposable-digital-single-operator-cholangiopancreatoscope
#14
Raj J Shah, Isaac Raijman, Brian Brauer, Bora Gumustop, Douglas K Pleskow
Background and study aim Our aim was to evaluate the first use in humans of a new, single-use, digital, single-operator intraductal cholangiopancreatoscopy system (IDCP). Patients and methods Data were collected retrospectively from four US institutions between February 2015 and April 2015. The visual impression of neoplasia or benign findings with IDCP was determined by the performing endoscopist. High grade dysplasia, intraductal papillary mucinous neoplasm, neuroendocrine tumor, and malignancy were categorized as neoplasia...
May 16, 2017: Endoscopy
https://www.readbyqxmd.com/read/28508297/adaptation-to-stochastic-temporal-variations-in-intratumoral-blood-flow-the-warburg-effect-as-a-bet-hedging-strategy
#15
Curtis A Gravenmier, Miriam Siddique, Robert A Gatenby
While most cancers promote ingrowth of host blood vessels, the resulting vascular network usually fails to develop a mature organization, resulting in abnormal vascular dynamics with stochastic variations that include slowing, cessation, and even reversal of flow. Thus, substantial spatial and temporal variations in oxygen concentration are commonly observed in most cancers. Cancer cells, like all living systems, are subject to Darwinian dynamics such that their survival and proliferation are dependent on developing optimal phenotypic adaptations to local environmental conditions...
May 15, 2017: Bulletin of Mathematical Biology
https://www.readbyqxmd.com/read/28500279/new-navigation-surgery-for-resection-of-lymphatic-malformations-using-indocyanine-green-fluorescence-imaging
#16
Chiyoe Shirota, Akinari Hinoki, Masataka Takahashi, Yujiro Tanaka, Takahisa Tainaka, Wataru Sumida, Naruhiko Murase, Kazuo Oshima, Ryo Shirotsuki, Kosuke Chiba, Yuji Morimoto, Hiroo Uchida
BACKGROUND We used indocyanine green (ICG) fluorescence imaging to completely resect lymphatic malformations (LMs). This is the first report of navigation surgery utilizing ICG fluorescence imaging for resection of LMs. CASE REPORT A 15-year-old boy was diagnosed with LMs in the abdominal wall. The extent of the tumor was determined by an ultrasound, and ICG (Diagnogreen®, Daiichi-Sankyo Pharma, Tokyo, Japan) was injected subcutaneously and intradermally into the core and 2 marginal regions of the tumor (3 injections in total), respectively...
May 13, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/28499275/effects-of-microrna-126-on-cell-proliferation-apoptosis-and-tumor-angiogenesis-via-the-down-regulating-erk-signaling-pathway-by-targeting-egfl7-in-hepatocellular-carcinoma
#17
Cheng Gong, Jing Fang, Guang Li, Han-Han Liu, Zhi-Su Liu
This study intends to explore the effects of microRNA-126 (miR-126) on cell proliferation, apoptosis, and tumor angiogenesis in hepatocellular carcinoma (HCC) by regulating epidermal growth factor-like domain 7 (EGFL7) through extracellular signal-regulated kinase (ERK) signaling. HCC tissues and adjacent normal tissues were obtained from 184 HCC patients. HCC cells were separately transfected with recombinant plasmids. Western blotting and qRT-PCR were applied to detect miR-126 and EGFL7, ERK, Fas/FasL, Bcl-2, Caspase mRNA and protein levels...
April 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28496326/gold-nanoparticles-attenuate-metastasis-by-tumor-vasculature-normalization-and-epithelial-mesenchymal-transition-inhibition
#18
Wei Li, Xin Li, Shuhao Liu, Wende Yang, Fan Pan, Xiao-Yan Yang, Bin Du, Li Qin, Yunlong Pan
Angiogenesis is a process by which vessels are formed through preexisting ones, and this plays a key role in the progression of solid tumors. However, tumor vessels are influenced by excessive pro-angiogenic factors, resulting in deformed structures that facilitate the intravasation of tumor cells into the circulation and subsequent metastasis. Moreover, abnormal tumor vessels have low blood perfusion and thereby decreased oxygen infusion into tumors. This results in a hostile microenvironment that promotes epithelial-mesenchymal transition (EMT), a process in which epithelial cells lose their polarity and gain increased motility, which is associated with metastasis and invasion...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28492341/implications-of-neurovascular-uncoupling-in-functional-magnetic-resonance-imaging-fmri-of-brain-tumors
#19
Rebecca W Pak, Darian H Hadjiabadi, Janaka Senarathna, Shruti Agarwal, Nitish V Thakor, Jay J Pillai, Arvind P Pathak
Functional magnetic resonance imaging (fMRI) serves as a critical tool for presurgical mapping of eloquent cortex and changes in neurological function in patients diagnosed with brain tumors. However, the blood-oxygen-level-dependent (BOLD) contrast mechanism underlying fMRI assumes that neurovascular coupling remains intact during brain tumor progression, and that measured changes in cerebral blood flow (CBF) are correlated with neuronal function. Recent preclinical and clinical studies have demonstrated that even low-grade brain tumors can exhibit neurovascular uncoupling (NVU), which can confound interpretation of fMRI data...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28489706/optical-coherence-tomography-angiography-of-congenital-simple-hamartoma-of-the-retinal-pigment-epithelium
#20
Parnian Arjmand, Elizabeth B Elimimian, Emil A T Say, Carol L Shields
PURPOSE: To describe the optical coherence tomography angiography features of congenital simple hamartoma of the retinal pigment epithelium. METHODS: Case report. RESULTS: A 14-year-old boy was referred for an asymptomatic fundus tumor in the left eye. Visual acuity was 20/20 in the right eye and 20/40 in the left eye. The right fundus was normal. The left fundus disclosed a gray-white nodular retinal mass of 2-mm diameter in the juxtafoveal region, protruding into the vitreous cavity and causing radial retinal folds...
May 9, 2017: Retinal Cases & Brief Reports
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