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https://www.readbyqxmd.com/read/29443512/diels-alder-click-crosslinked-hydrogels-with-increased-reactivity-enable-3d-cell-encapsulation
#1
Laura J Smith, S Maryamdokht Taimoory, Roger Y Tam, Alexander E G Baker, Niema Binth Mohammad, John F Trant, Molly S Shoichet
Engineered hydrogels have been extensively used to direct cell function in 3D cell culture models, which are more representative of the native cellular microenvironment than conventional 2D cell culture. Previously, hyaluronan-furan and bis-maleimide polyethylene glycol hydrogels were synthesized via Diels-Alder chemistry at acidic pH, which did not allow encapsulation of viable cells. In order to enable gelation at physiological pH, the reaction kinetics were accelerated by replacing the hyaluronan-furan with the more electron-rich hyaluronan-methylfuran...
February 14, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29440666/folic-acid-exposure-rescues-spina-bifida-aperta-phenotypes-in-human-induced-pluripotent-stem-cell-model
#2
Vardine Sahakyan, Robin Duelen, Wai Long Tam, Scott J Roberts, Hanne Grosemans, Pieter Berckmans, Gabriele Ceccarelli, Gloria Pelizzo, Vania Broccoli, Jan Deprest, Frank P Luyten, Catherine M Verfaillie, Maurilio Sampaolesi
Neural tube defects (NTDs) are severe congenital abnormalities, caused by failed closure of neural tube during early embryonic development. Periconceptional folic acid (FA) supplementation greatly reduces the risk of NTDs. However, the molecular mechanisms behind NTDs and the preventive role of FA remain unclear. Here, we use human induced pluripotent stem cells (iPSCs) derived from fetuses with spina bifida aperta (SBA) to study the pathophysiology of NTDs and explore the effects of FA exposure. We report that FA exposure in SBA model is necessary for the proper formation and maturation of neural tube structures and robust differentiation of mesodermal derivatives...
February 13, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29440328/evaluation-of-california-s-tobacco-21-law
#3
Xueying Zhang, Tam D Vuong, Elizabeth Andersen-Rodgers, April Roeseler
INTRODUCTION: California's law raising the minimum tobacco sales age to 21 went into effect on 9 June 2016. This law, known as 'Tobacco 21' or 'T21', also expanded the definition of tobacco to include electronic smoking devices. This paper describes the T21 evaluation plan and initial evaluation results. METHODS: An evaluation plan and logic model were created to evaluate T21. A tobacco retailer poll was conducted 7 months after the law went into effect to assess awareness, support and implementation; an online survey of California adults was fielded to provide data on tobacco use and attitudinal changes before and after T21 implementation; and tobacco purchase surveys were conducted to assess the retailer violation rate (RVR)...
February 13, 2018: Tobacco Control
https://www.readbyqxmd.com/read/29440144/spon2-promotes-m1-like-macrophage-recruitment-and-inhibits-hepatocellular-carcinoma-metastasis-by-distinct-integrin-rho-gtpase-hippo-pathways
#4
Yan-Li Zhang, Qing Li, Xiao-Mei Yang, Fang Fang, Jun Li, Ya-Hui Wang, Qin Yang, Lei Zhu, Hui-Zhen Nie, Xue-Li Zhang, Ming-Xuan Feng, Shu-Heng Jiang, Guang-Ang Tian, Li-Peng Hu, Ho-Young Lee, Su-Jae Lee, Qiang Xia, Zhi-Gang Zhang
Tumor-associated macrophages (TAM) represent key regulators of the complex interplay between cancer and the immune microenvironment. Matricellular protein SPON2 is essential for recruiting lymphocytes and initiating immune responses. Recent studies have shown that SPON2 has complicated roles in cell migration and tumor progression. Here we report that, in the tumor microenvironment of hepatocellular carcinoma (HCC), SPON2 not only promotes infiltration of M1-like macrophages but also inhibits tumor metastasis...
February 13, 2018: Cancer Research
https://www.readbyqxmd.com/read/29439680/microtiter-miniature-shaken-bioreactor-system-as-a-scale-down-model-for-process-development-of-production-of-therapeutic-alpha-interferon2b-by-recombinant-escherichia-coli
#5
Joo Shun Tan, Sahar Abbasiliasi, Saeid Kadkhodaei, Yew Joon Tam, Teck-Kim Tang, Yee-Ying Lee, Arbakariya B Ariff
BACKGROUND: Demand for high-throughput bioprocessing has dramatically increased especially in the biopharmaceutical industry because the technologies are of vital importance to process optimization and media development. This can be efficiently boosted by using microtiter plate (MTP) cultivation setup embedded into an automated liquid-handling system. The objective of this study was to establish an automated microscale method for upstream and downstream bioprocessing of α-IFN2b production by recombinant Escherichia coli...
January 4, 2018: BMC Microbiology
https://www.readbyqxmd.com/read/29439488/a-physical-health-profile-of-youths-living-with-a-hikikomori-lifestyle
#6
John W M Yuen, Yoyo K Y Yan, Victor C W Wong, Wilson W S Tam, Ka-Wing So, Wai-Tong Chien
A cross-sectional study was designed to understand the impacts of "hikikomori" lifestyle on physical health. A total of 104 eligible hikikomori cases were recruited from the social services network of Hong Kong with a mean age of 19.02 ± 3.62 (ranged 13-31) year-old, and had completed the set of questionnaires and a series of anthropometric and physical health measurements. Despite SF36 score of 84.0 indicated good physical functioning in general, participants were lived sedentarily with high incidence of hypertension at 15...
February 11, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29439186/severe-hemolysis-and-transfusion-reactions-after-treatment-with-bgb-3111-and-pd-1-antibody-for-waldenstr%C3%A3-m-macroglobulinemia
#7
Jad Othman, Emma Verner, Constantine S Tam, Jane Huang, Leo Lin, James Hilger, Judith Trotman, Robin Gasioroswki
No abstract text is available yet for this article.
February 8, 2018: Haematologica
https://www.readbyqxmd.com/read/29437878/essential-role-of-polo-like-kinase-1-plk1-oncogene-in-tumor-growth-and-metastasis-of-tamoxifen-resistant-breast-cancer
#8
Sung Baek Jeong, Ji Hye Im, Jeong-Hoon Yoon, Quyen Thu Bui, Sung Chul Lim, Joon Myong Song, Yumi Shim, Jieun Yun, Janghee Hong, Keon Wook Kang
The most common therapy for estrogen receptor-positive breast cancer is anti-hormone therapy such as tamoxifen (TAM). However, acquisition of resistance to TAM in one-third of patients presents a serious clinical problem. Polo-like kinase 1 (Plk1) is a key oncogenic regulator of completion of G2/M phase of the cell cycle. We assessed Plk1 expression in five chemoresistant cancer cell types and found that Plk1 and its downstream phosphatase Cdc25c were selectively overexpressed in TAM-resistant MCF-7 (TAMR-MCF-7) breast cancer cells...
February 7, 2018: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29437708/expression-of-adipocyte-macrophage-fatty-acid-binding-protein-in-tumor-associated-macrophages-promotes-breast-cancer-progression
#9
Jiaqing Hao, Fei Yan, Yuwen Zhang, Ashley Triplett, Ying Zhang, Debra A Schultz, Yanwen Sun, Jun Zeng, Kevin A T Silverstein, Qi Zheng, David A Bernlohr, Margot P Cleary, Nejat K Egilmez, Edward Sauter, Shujun Liu, Jill Suttles, Bing Li
Tumor associated macrophages (TAM) play a critical role in cancer development and progression. However, the heterogeneity of TAM presents a major challenge to identify clinically-relevant markers for pro-tumor TAM. Here, we report that expression of adipocyte/macrophage fatty acid binding protein (A-FABP) in TAM promotes breast cancer progression. While upregulation of A-FABP was inversely associated with breast cancer survival, deficiency of A-FABP significantly reduced mammary tumor growth and metastasis...
February 6, 2018: Cancer Research
https://www.readbyqxmd.com/read/29436400/association-of-the-pax6-gene-with-extreme-myopia-rather-than-lower-grade-myopias
#10
Shu Min Tang, Li Ma, Shi Yao Lu, Yu Meng Wang, Ka Wai Kam, Pancy O S Tam, Alvin L Young, Chi Pui Pang, Jason C S Yam, Li Jia Chen
AIMS: To investigate the association of the paired box gene 6 ( PAX6 ) with different severities of myopia. METHODS: A total of four haplotype-tagging single-nucleotide polymorphisms (SNPs; rs2071754, rs3026354, rs3026390 and rs628224) and two previously reported SNPs (rs644242 and rs662702) in the PAX6 gene were analysed in a Hong Kong Chinese cohort of 1288 myopia subjects (including 252 extreme myopia, 277 high myopia, 393 moderate myopia and 366 mild myopia) and 791 no myopia controls...
February 7, 2018: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29436396/rapid-activation-of-tumor-associated-macrophages-boosts-preexisting-tumor-immunity
#11
Sabine Hoves, Chia-Huey Ooi, Carsten Wolter, Hadassah Sade, Stefan Bissinger, Martina Schmittnaegel, Oliver Ast, Anna M Giusti, Katharina Wartha, Valeria Runza, Wei Xu, Yvonne Kienast, Michael A Cannarile, Hyam Levitsky, Solange Romagnoli, Michele De Palma, Dominik Rüttinger, Carola H Ries
Depletion of immunosuppressive tumor-associated macrophages (TAMs) or reprogramming toward a proinflammatory activation state represent different strategies to therapeutically target this abundant myeloid population. In this study, we report that inhibition of colony-stimulating factor-1 receptor (CSF-1R) signaling sensitizes TAMs to profound and rapid reprogramming in the presence of a CD40 agonist before their depletion. Despite the short-lived nature of macrophage hyperactivation, combined CSF-1R+CD40 stimulation of macrophages is sufficient to create a proinflammatory tumor milieu that reinvigorates an effective T cell response in transplanted tumors that are either responsive or insensitive to immune checkpoint blockade...
February 7, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29436395/myeloid-targeted-immunotherapies-act-in-synergy-to-induce-inflammation-and-antitumor-immunity
#12
Curtis J Perry, Andrés R Muñoz-Rojas, Katrina M Meeth, Laura N Kellman, Robert A Amezquita, Durga Thakral, Victor Y Du, Jake Xiao Wang, William Damsky, Alexandra L Kuhlmann, Joel W Sher, Marcus Bosenberg, Kathryn Miller-Jensen, Susan M Kaech
Eliciting effective antitumor immune responses in patients who fail checkpoint inhibitor therapy is a critical challenge in cancer immunotherapy, and in such patients, tumor-associated myeloid cells and macrophages (TAMs) are promising therapeutic targets. We demonstrate in an autochthonous, poorly immunogenic mouse model of melanoma that combination therapy with an agonistic anti-CD40 mAb and CSF-1R inhibitor potently suppressed tumor growth. Microwell assays to measure multiplex protein secretion by single cells identified that untreated tumors have distinct TAM subpopulations secreting MMP9 or cosecreting CCL17/22, characteristic of an M2-like state...
February 7, 2018: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29436278/assessing-the-impact-of-targeting-ceacam1-in-head-and-neck-squamous-cell-carcinoma
#13
Kenric Tam, David W Schoppy, June Ho Shin, Joshua K Tay, Uriel Moreno-Nieves, David C Mundy, John B Sunwoo
Objective In conjunction with advances made in cytotoxic chemotherapy, radiation, and surgery, immunotherapy has emerged as a fourth modality of treatment for head and neck squamous cell carcinoma (HNSCC). Understanding the mechanisms by which HNSCC evades immune-mediated control will aid in the development of new therapies to augment an antitumor immune response. Carcinoembryonic antigen-related cell adhesion molecule 1 (CEACAM1) is a cell surface receptor that is expressed on malignant cells and lymphocytes such as natural killer (NK) cells...
February 1, 2018: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/29435127/%C3%AE-tocopherol-succinate-enhances-pterostilbene-anti-tumor-activity-in-human-breast-cancer-cells-in-vivo-and-in-vitro
#14
Ka-Wai Tam, Chi-Tang Ho, Shih-Hsin Tu, Wen-Jui Lee, Ching-Shui Huang, Ching-Shyang Chen, Chih-Hsiung Wu, Chia-Hwa Lee, Yuan-Soon Ho
Vitamin E (Vit. E) is considered an essential dietary nutrient for humans and animals. An enormous body of evidence indicates the biological and protective effects of Vit. E consumption. Tocopherol-associated protein (TAP) is a major tocopherol-binding protein affecting Vit. E stimulation and downstream signaling transduction. However, how Vit. E utilizes TAP as an anti-cancer mechanism remains unclear. Microarray analysis of signature gene profiles in breast cancer cells treated with α-tocopheryl succinate (α-TOS, a Vit...
January 12, 2018: Oncotarget
https://www.readbyqxmd.com/read/29434884/endostatin-reverses-immunosuppression-of-the-tumor-microenvironment-in-lung-carcinoma
#15
Xiaolin Liu, Weiwei Nie, Qi Xie, Guoling Chen, Xingyu Li, Yanrui Jia, Beibei Yin, Xun Qu, Yan Li, Jing Liang
Endostatin has previously been demonstrated to efficiently inhibit the angiogenesis and growth of endothelial cells. However, the role of endostatin in the tumor microenvironment remains to be elucidated. To investigate the antitumor effect of endostatin in lung cancer, the present study was designed to explore the alterations of microvessel density in Lewis lung cancer models and the expression of vascular endothelial growth factor (VEGF), interleukin (IL)-6, IL-17, interferon (IFN)-γ and hypoxia inducible factor (HIF)-1α, following endostatin therapy...
February 2018: Oncology Letters
https://www.readbyqxmd.com/read/29434448/promotion-of-sema4d-expression-by-tumor-associated-macrophages-significance-in-gastric-carcinoma
#16
Han Li, Jin-Shen Wang, Lin-Jun Mu, Ke-Shu Shan, Le-Ping Li, Yan-Bing Zhou
AIM: To study the role of semaphorin 4D (Sema4D) expression promoted by tumor-associated macrophages (TAMs) in gastric carcinoma cells and its clinical significance in the invasion and metastasis of gastric carcinoma. METHODS: CD68 and Sema4D expression was analyzed in gastric carcinoma and adjacent normal tissues from 290 patients using the immunohistochemical streptavidin-peroxidase method, and their relationships with clinicopathological features were evaluated...
February 7, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29434331/prevalence-of-depression-in-the-community-from-30-countries-between-1994-and-2014
#17
Grace Y Lim, Wilson W Tam, Yanxia Lu, Cyrus S Ho, Melvyn W Zhang, Roger C Ho
The prevalence of depression may be affected by changes in psychiatric practices and the availability of online mental health information in the past two decades. This study aimed to evaluate the aggregate prevalence of depression in communities from different countries between 1994 and 2014 and to explore the variations in prevalence stratified by geographical, methodological and socio-economic factors. A total of 90 studies were identified and met the inclusion criteria (n = 1,112,573 adults) with 68 studies on single point prevalence, 9 studies on one-year prevalence, and 13 studies on lifetime prevalence of depression...
February 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29432998/prevalence-of-depression-among-nursing-students-a-systematic-review-and-meta-analysis
#18
REVIEW
Yi-Jung Tung, Kenneth K H Lo, Roger C M Ho, Wai San Wilson Tam
OBJECTIVES: To examine the global prevalence of depression among nursing students and the variation in depression rates influenced by demographic and educational factors. BACKGROUND: Depression affects approximately 350 million people worldwide and is the world's leading cause of disability. Nursing students struggle to cope with not only stressors common in higher education institutions but also anxiety towards clinical placements. Evidence has suggested high prevalence of depression among them, but no reviews have been conducted to report a consolidated prevalence...
February 9, 2018: Nurse Education Today
https://www.readbyqxmd.com/read/29431125/follow-your-virtual-trainer-fyvt-a-randomised-controlled-trial-protocol-of-it-based-lifestyle-intervention-programme-to-promote-physical-activity-and-health-among-middle-aged-hong-kong-chinese
#19
Stanley Sai-Chuen Hui, Yao Jie Xie, Ron Chi-Wai Kwok, Eric Wing-Cheung Tam, Winnie Wing Sze Mak, Phoenix Kit-Han Mo
INTRODUCTION: Hong Kong is a highly urbanised city where many people work long hours. The limited time and lack of professional instruction are the typical barriers to exercise. The purpose of this study is to test the effectiveness of an information technology-based lifestyle intervention programme on improving physical activity (PA) level and health status in a sample of middle-aged Hong Kong adults. METHODS AND ANALYSIS: A two-arm parallel randomised controlled trial named 'Follow Your Virtual Trainer' will be conducted among 200 physically inactive Chinese adults aged from 40 to 65 years...
February 3, 2018: BMJ Open
https://www.readbyqxmd.com/read/29430522/multivalent-polymers-displaying-m2-macrophage-targeting-peptides-improve-target-binding-avidity-and-serum-stability
#20
Chayanon Ngambenjawong, Suzie H Pun
Tumor-associated macrophages (TAMs) display a spectrum of phenotypes ranging from pro-tumoral/anti-inflammatory "M2-like" to anti-tumoral/pro-inflammatory "M1-like" subtypes and, consequently, high intratumoral M2-to-M1 ratios are typically indicative of poor disease prognosis. Cancer immunotherapies that selectively modulate M2-like TAMs, enabling reversal of the M2-to-M1 ratio, represent a promising anti-cancer intervention but are difficult to implement due to the lack of effective targeting systems...
September 11, 2017: ACS Biomaterials Science & Engineering
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