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https://www.readbyqxmd.com/read/28214380/application-of-the-mechpeff-model-to-predict-passive-effective-intestinal-permeability-in-the-different-regions-of-the-rodent-small-intestine-and-colon
#1
D Pade, M Jamei, A Rostami-Hodjegan, D B Turner
A major component of Physiologically-Based Pharmacokinetic (PBPK) models is prediction of the rate and extent of absorption of orally dosed drugs for which knowledge of effective passive intestinal permeability (Peff ) is essential. Single pass intestinal perfusion (SPIP) studies are used to establish effective permeability in vivo but are difficult to perform in rodents while mechanistic models to predict drug Peff in rat and mouse have not been published. This work evaluates the predictive performance of the 'MechPeff' model to predict Peff in the rodent intestine based upon knowledge of regional gut physiology and drug-specific physicochemical parameters...
February 18, 2017: Biopharmaceutics & Drug Disposition
https://www.readbyqxmd.com/read/28214359/gene-expression-plasticity-in-response-to-salinity-acclimation-in-threespine-stickleback-ecotypes-from-different-salinity-habitats
#2
Taylor C Gibbons, David C H Metzger, Timothy M Healy, Patricia M Schulte
Phenotypic plasticity is thought to facilitate the colonization of novel environments and shape the direction of evolution in colonizing populations. However, the relative prevalence of various predicted patterns of changes in phenotypic plasticity following colonization remain unclear. Here we use a whole-transcriptome approach to characterize patterns of gene expression plasticity in the gills of a freshwater-adapted and a saltwater-adapted ecotype of threespine stickleback (Gasterosteus aculeatus) exposed to a range of salinities...
February 18, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28214210/pathologic-features-of-colorectal-carcinomas-associated-with-crohn-s-disease-in-korean-population
#3
Jiyoon Kim, Ho-Su Lee, Sang Hyoung Park, Suk-Kyun Yang, Byong Duk Ye, Dong-Hoon Yang, Kyung-Jo Kim, Jeong-Sik Byeon, Yong Sik Yoon, Chang Sik Yu, Jihun Kim
BACKGROUND: Colorectal cancer (CRC) has been known to complicate Crohn's disease (CD). Several reports in Western population revealed that CRC in CD were characterized by much younger onset and equal distribution of tumors along the entire colon. However, clinicopathologic features of CD-associated CRC in Korean population have not been well documented yet. METHODS: Among 2968 Korean CD patients, 16 patients (0.54%) were found to develop CRC during follow up. We reviewed clinicopathologic features of the 16 CRC patients...
December 21, 2016: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28214209/expression-and-promoter-dna-methylation-of-mlh1-in-colorectal-cancer-and-lung-cancer
#4
Yunxia Ma, Yuan Chen, Iver Petersen
AIMS: Aberrant DNA methylation is a common molecular feature in human cancer. The aims of this study were to analyze the methylation status of MLH1, one of the DNA mismatch repair (MMR) genes, in human colorectal and lung cancer and to evaluate its clinical relevance. METHODS: The expression of MLH1 was analyzed in 8 colorectal cancer (CRC) and 8 lung cancer cell lines by real-time RT-PCR and western blotting. The MLH1 protein expression was evaluated by immunohistochemistry on tissue microarrays including 121 primary CRC and 90 lung cancer patient samples...
January 22, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28214186/characteristics-and-prognosis-of-japanese-colorectal-cancer-patients-the-biobank-japan-project
#5
Akiko Tamakoshi, Koshi Nakamura, Shigekazu Ukawa, Emiko Okada, Makoto Hirata, Akiko Nagai, Koichi Matsuda, Yoichiro Kamatani, Kaori Muto, Yutaka Kiyohara, Zentaro Yamagata, Toshiharu Ninomiya, Michiaki Kubo, Yusuke Nakamura
BACKGROUND: Colorectal cancer is the third most common cancer worldwide, and in Japan, it is estimated that about 10% of men and 8% of women will be diagnosed with colorectal cancer during their lifetime. METHODS: We focused on 5864 participants (3699 men and 2165 women) who had colorectal cancer and were registered with BioBank Japan (BBJ) between April 2003 and March 2008. Characteristics of colon and rectal cancer patients were calculated separately. Among the enrolled patients registered in BBJ within 90 days after diagnosis, we also calculated the 5-year cumulative and relative survival rates, and estimated the effect of lifestyle factors on all-cause mortality...
February 14, 2017: Journal of Epidemiology
https://www.readbyqxmd.com/read/28214167/psychometric-evaluation-and-design-of-patient-centered-communication-measures-for-cancer-care-settings
#6
Bryce B Reeve, David M Thissen, Carla M Bann, Nicole Mack, Katherine Treiman, Hanna K Sanoff, Nancy Roach, Brooke E Magnus, Jason He, Laura K Wagner, Rebecca Moultrie, Kathryn D Jackson, Courtney Mann, Lauren A McCormack
OBJECTIVE: To evaluate the psychometric properties of questions that assess patient perceptions of patient-provider communication and design measures of patient-centered communication (PCC). METHODS: Participants (adults with colon or rectal cancer living in North Carolina) completed a survey at 2 to 3 months post-diagnosis. The survey included 87 questions in six PCC Functions: Exchanging Information, Fostering Health Relationships, Making Decisions, Responding to Emotions, Enabling Patient Self-Management, and Managing Uncertainty...
February 10, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/28214159/is-surveillance-for-colonization-of-carbapenem-resistant-gram-negative-bacteria-important-in-adult-bone-marrow-transplantation-units
#7
Hayati Demiraslan, Fatma Cevahir, Elife Berk, Gokhan Metan, Mustafa Cetin, Emine Alp
BACKGROUND: The aim of this study was to investigate the rate of carbapenem-resistant gram-negative bacilli (CRGNB) colonization and to analyze the risk factors associated with CRGNB colonization. METHODS: This prospective study was conducted in adult patients hospitalized in hematopoietic stem cell transplantation (HSCT) units over a period of 8 months. Rectal swab samples were obtained from each participant every Monday, and patients CRGNB positive on admission were excluded...
February 15, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28214100/nlrp6-a-multifaceted-innate-immune-sensor
#8
REVIEW
Maayan Levy, Hagit Shapiro, Christoph A Thaiss, Eran Elinav
NLRP6, a member of the nucleotide-binding domain, leucine-rich repeat-containing (NLR) innate immune receptor family, regulates inflammation and host defense against microorganisms. Similar to other NLRs, NLRP6 not only participates in inflammasome formation, but is also involved in nuclear factor-κB (NF-κB) and mitogen-activated protein kinase (MAPK) signaling regulation and facilitation of gastrointestinal antiviral effector functions. Additionally, NLRP6 contributes to the regulation of mucus secretion and antimicrobial peptide production, thereby impacting intestinal microbial colonization and associated microbiome-related infectious, autoinflammatory, metabolic, and neoplastic diseases...
February 14, 2017: Trends in Immunology
https://www.readbyqxmd.com/read/28214040/reinforcement-of-intestinal-epithelial-barrier-by-arabinoxylans-in-overweight-and-obese-subjects-a-randomized-controlled-trial-arabinoxylans-in-gut-barrier
#9
Bouke N Salden, Freddy J Troost, Ellen Wilms, Pilar Truchado, Ramiro Vilchez-Vargas, Dietmar H Pieper, Ruy Jáuregui, Massimo Marzorati, Tom van de Wiele, Sam Possemiers, Ad A Masclee
BACKGROUND & AIMS: Obesity and metabolic diseases are associated with alterations in microbial composition and impaired gut barrier. Previous in vitro and animal studies have shown that arabinoxylans (AX) have the potential to modulate gut microbiota and gut barrier and therefore could have a protective role. Primary aim of the study was to investigate the effect of AX on intestinal permeability. Secondary aims included the effect of AX on gene transcription and protein expression of tight junctions (TJ), intestinal microbiota composition and activity, immune response and metabolic markers in overweight and obese individuals...
February 3, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28213809/the-correlation-between-biofilm-production-and-catheter-related-blood-stream-infections-sustained-by-candida-a-case-control-study
#10
Grazia Brunetti, Valeria Visconti, Maria Cristina Ghezzi, Alessandra Giordano, Giammarco Raponi
Biofilm forming capacity of yeasts colonizing the intravenous devices is considered a key factor involved in the pathogenesis of Candida catheter-related bloodstream infections (CCRBSI). The biofilm production of strains of Candida spp. isolated both from the CVC and from the blood of patients with CCRBSI was compared to that of strains isolated from patients not having CCRBSI. Results, expressed in terms of Biofilm Index (BI), revealed that biofilm-producing strains were isolated in the CCRBSI group with a frequency significantly higher than in the non-CCRBSI group (χ(2) = 4...
February 18, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28213788/three-different-approaches-to-the-inferior-mesenteric-artery-during-robotic-d3-lymphadenectomy-for-rectal-cancer
#11
Songphol Malakorn, Tarik Sammour, Brian Bednarski, Yi-Qian Nancy You, George J Chang
BACKGROUND: In rectal cancer surgery, proximal ligation of the inferior mesenteric artery (IMA) with radical lymphadenectomy is the accepted standard of care.1 Our purpose is to describe three different standardized technical approaches for the management of the IMA during D3 lymphadenectomy.2 METHODS: Operative videos of three robotic D3 lymphadenectomy procedures for rectal cancer were reviewed and annotated with schematic anatomical descriptions for clarification. RESULTS: There are three methods for the management of the IMA during D3 lymphadenectomy for rectal cancer...
February 17, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28213779/adenoid-bacterial-colonization-in-a-paediatric-population
#12
João Subtil, João Carlos Rodrigues, Lúcia Reis, Luís Freitas, Joana Filipe, Alberto Santos, Carlos Macor, Aida Duarte, Luisa Jordao
Adenoids play a key role in both respiratory and ear infection in children. It has also been shown that adenoidectomy improves these symptoms in this population. The main goal of the present study was to evaluate adenoid bacterial colonization and document a possible relation with infectious respiratory disease. A prospective observational study was designed to evaluate the proposed hypothesis in a paediatric population submitted to adenoidectomy by either infectious or non-infectious indications and compare these two cohorts...
February 18, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28213732/the-potential-of-lactic-acid-bacteria-to-colonize-biotic-and-abiotic-surfaces-and-the-investigation-of-their-interactions-and-mechanisms
#13
REVIEW
Mattia Pia Arena, Vittorio Capozzi, Giuseppe Spano, Daniela Fiocco
Lactic acid bacteria (LAB) are a heterogeneous group of Gram-positive bacteria that comprise several species which have evolved in close association with humans (food and lifestyle). While their use to ferment food dates back to very ancient times, in the last decades, LAB have attracted much attention for their documented beneficial properties and for potential biomedical applications. Some LAB are commensal that colonize, stably or transiently, host mucosal surfaces, inlcuding the gut, where they may contribute to host health...
February 17, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28213610/prebiotic-inulin-type-fructans-induce-specific-changes-in-the-human-gut-microbiota
#14
Doris Vandeputte, Gwen Falony, Sara Vieira-Silva, Jun Wang, Manuela Sailer, Stephan Theis, Kristin Verbeke, Jeroen Raes
OBJECTIVE: Contrary to the long-standing prerequisite of inducing selective (ie, bifidogenic) effects, recent findings suggest that prebiotic interventions lead to ecosystem-wide microbiota shifts. Yet, a comprehensive characterisation of this process is still lacking. Here, we apply 16S rDNA microbiota profiling and matching (gas chromatography mass spectrometry) metabolomics to assess the consequences of inulin fermentation both on the composition of the colon bacterial ecosystem and faecal metabolites profiles...
February 17, 2017: Gut
https://www.readbyqxmd.com/read/28213538/colonization-and-transmission-of-the-gut-microbiota-of-the-burying-beetle-nicrophorus-vespilloides-through-development
#15
Yin Wang, Daniel E Rozen
Carrion beetles in the genus Nicrophorus rear their offspring on decomposing carcasses where larvae are exposed to a diverse community of decomposer bacteria. Parents coat the carcass with antimicrobial secretions prior to egg hatch (defined as Pre-Hatch care) and also feed regurgitated food, and potentially bacteria, to larvae throughout development (defined as Full care). Here we partition the roles of pre- and post-hatch parental care in the transmission and persistence of culturable symbiotic bacteria to larvae...
February 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28213288/inhibition-of-estrogen-related-receptor-%C3%AE-attenuates-vascular-smooth-muscle-cell-proliferation-and-migration-by-regulating-rhoa-p27-kip1-and-%C3%AE-catenin-wnt4-signaling-pathway
#16
Qunyi Li, Lei Zhu, Liudi Zhang, Haifei Chen, Yingfeng Zhu, Yongli Du, Wanxian Zhong, Mingkang Zhong, Xiaojin Shi
RhoA/p27(Kip1) and β-Catenin/Wnt4 signaling processes play central roles in proliferation and migration in vascular smooth muscle cells (VSMCs). ERRα, a member of orphan nuclear receptors, is a potent prognostic factor in breast, ovarian, colon and other types of tumors. However, biological significance of ERRα in VSMCs as well as the molecular mechanisms remains largely unknown. Therefore, the present study was designed to investigate whether ERRα is involved in the proliferation and migration of VSMCs in vitro and neointimal formation in vivo...
February 14, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28213097/self-assembled-tumor-targeting-hyaluronic-acid-nanoparticles-for-photothermal-ablation-in-orthotopic-bladder-cancer
#17
Tingsheng Lin, Ahu Yuan, Xiaozhi Zhao, Huibo Lian, Junlong Zhuang, Wei Chen, Qing Zhang, Guangxiang Liu, Shiwei Zhang, Wei Chen, Wenmin Cao, Chengwei Zhang, Jinhui Wu, Yiqiao Hu, Hongqian Guo
: Bladder cancer is one of the most frequent malignancies in the urinary system. Radical cystectomy is inevitable when bladder cancer progresses to a muscle-invasive disease. However, cystectomy still causes a high risk of death and a low quality of life (such as ureter-abdomen ostomy, uroclepsia for ileal-colon neobladder). Therefore, more effective treatments as well as bladder preservation are needed. We developed self-assembled tumor-targeting hyaluronic acid-IR-780 nanoparticles for photothermal ablation in over-expressing CD44 (the receptor for HA) bladder cancer, which show high tumor selectivity, high treatment efficacy, good bioavailability, and excellent biocompatibility...
February 14, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28212885/epinephrine-promotes-cox-2-dependent-immune-suppression-in-myeloid-cells-and-cancer-tissues
#18
Ravikumar Muthuswamy, Nana J Okada, Frank J Jenkins, Kandace McGuire, Priscilla F McAuliffe, Herbert J Zeh, David L Bartlett, Callen Wallace, Simon Watkins, Jill D Henning, Dana H Bovbjerg, Pawel Kalinski
Activation of the sympathetic nervous system (e.g., due to stress) has been implicated in cancer progression and recurrence, but its cancer-promoting effects have been variable between different studies. Here, we report that although catecholamines, mediators of systemic sympathetic activity, display only weak immunosuppressive impact on their own, their combination with inflammatory signals leads to the induction of COX-2 and multiple COX-2-dependent suppressive factors in human myeloid cells and cancer tissues...
February 14, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28212863/yghj-the-secreted-metalloprotease-of-pathogenic-e-coli-induces-hemorrhagic-fluid-accumulation-in-mouse-ileal-loop
#19
Rima Tapader, Dipro Bose, Amit Pal
YghJ, also known as SsLE (Secreted and surface associated lipoprotein) is a cell surface associated and secreted lipoprotein harbouring M60 metalloprotease domain. Though the gene is known to be conserved among both pathogenic and commensal E. coli isolates, the expression and secretion of YghJ was found to be higher among diverse Escherichia coli pathotypes. YghJ, secreted from intestinal pathogens such as enterotoxigenic E. coli (ETEC) and enteropathogenic E. coli (EPEC) has been demonstrated to possess mucinase activity and hence facilitates colonization of these enteric pathogens to intestinal epithelial cells...
February 14, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28212861/accumulation-of-phosphatidylcholine-on-gut-mucosal-surface-is-not-dominated-by-electrostatic-interactions
#20
Agatha Korytowski, Wasim Abuillan, Federico Amadei, Ali Makky, Andrea Gumiero, Irmgard Sinning, Annika Gauss, Wolfgang Stremmel, Motomu Tanaka
The accumulation of phosphatidylcholine (PC) in the intestinal mucus layer is crucial for the protection of colon epithelia from the bacterial attack. It has been reported that the depletion of PC is a distinct feature of ulcerative colitis. Here we addressed the question how PC interacts with its binding proteins, the mucins, which may establish the hydrophobic barrier against colonic microbiota. In the first step, the interactions of dioleoylphosphatidylcholine (DOPC) with two mucin preparations from porcine stomach, have been studied using dynamic light scattering, zeta potential measurement, and Langmuir isotherms, suggesting that mucin binds to the surface of DOPC vesicles...
February 14, 2017: Biochimica et Biophysica Acta
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