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https://www.readbyqxmd.com/read/28513544/morphogenetically-active-barrier-membrane-for-guided-bone-regeneration-based-on-amorphous-polyphosphate
#1
Xiaohong Wang, Maximilian Ackermann, Meik Neufurth, Shunfeng Wang, Heinz C Schröder, Werner E G Müller
We describe a novel regeneratively-active barrier membrane which consists of a durable electrospun poly(ε-caprolactone) (PCL) net covered with a morphogenetically-active biohybrid material composed of collagen and inorganic polyphosphate (polyP). The patch-like fibrous collagen structures are decorated with small amorphous polyP nanoparticles (50 nm) formed by precipitation of this energy-rich and enzyme-degradable (alkaline phosphatase) polymer in the presence of calcium ions. The fabricated PCL-polyP/collagen hybrid mats are characterized by advantageous biomechanical properties, such as enhanced flexibility and stretchability with almost unaltered tensile strength of the PCL net...
May 17, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28510601/reproductive-biology-of-the-deep-brooding-coral-seriatopora-hystrix-implications-for-shallow-reef-recovery
#2
Rian Prasetia, Frederic Sinniger, Kaito Hashizume, Saki Harii
Mesophotic coral ecosystems (MCEs, between 30 and 150 m depth) are hypothesized to contribute to the recovery of degraded shallow reefs through sexually produced larvae (referred to as Deep Reef Refuge Hypothesis). In Okinawa, Japan, the brooder coral Seriatopora hystrix was reported to be locally extinct in a shallow reef while it was found abundant at a MCE nearby. In this context, S. hystrix represents a key model to test the Deep Reef Refuge Hypothesis and to understand the potential contribution of mesophotic corals to shallow coral reef recovery...
2017: PloS One
https://www.readbyqxmd.com/read/28505114/osteopontin-deficiency-suppresses-intestinal-tumor-development-in-apc-deficient-min-mice
#3
Rikako Ishigamori, Masami Komiya, Shinji Takasu, Michihiro Mutoh, Toshio Imai, Mami Takahashi
Osteopontin (OPN) is a secreted phosphoglycoprotein, and is a transcriptional target of aberrant Wnt signaling. OPN is upregulated in human colon cancers, and is suggested to enhance cancer progression. In this study, the effect of deficiency of OPN on intestinal tumor development in Apc-deficient Min mice was investigated. At 16 weeks of age, the number of small intestinal polyps in Min/OPN(+/-) and Min/OPN(-/-) mice was lower than that of Min/OPN(+/+) mice. Colorectal tumor incidences and multiplicities in Min/OPN(+/-) and Min/OPN(-/-) mice were significantly lower than those in Min/OPN(+/+) mice, being 48% and 0...
May 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28503955/new-insights-into-the-earliest-stages-of-colorectal-tumorigenesis
#4
Chelsie K Sievers, William M Grady, Richard B Halberg, Perry J Pickhardt
Tumors in the large intestine have been postulated to arise via a stepwise accumulation of mutations, a process that takes up to 20 years. Recent advances in lineage tracing and DNA sequencing, however, are revealing new evolutionary models that better explain the vast amount of heterogeneity observed within and across colorectal tumors. Areas Covered: A review of the literature supporting a novel model of colorectal tumor evolution was conducted. The following commentary examines the basic science and clinical evidence supporting a modified view of tumor initiation and progression in the colon...
May 15, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28493238/cold-polypectomy-for-duodenal-adenomas-a-prospective-clinical-trial
#5
Daisuke Maruoka, Tomoaki Matsumura, Shingo Kasamatsu, Hideaki Ishigami, Takashi Taida, Kenichiro Okimoto, Tomoo Nakagawa, Tatsuro Katsuno, Makoto Arai
Background and study aims Endoscopic resection is effective in treating nonampullary duodenal adenomas but has a high incidence of complications. Cold polypectomy, including cold forceps polypectomy (CFP) and cold snare polypectomy (CSP), is safe and effective in treating colorectal polyps. However, its utility in sporadic nonampullary duodenal adenomas has not been investigated. The purpose of this prospective study was to examine the safety and efficacy of cold polypectomy for sporadic nonampullary duodenal adenomas...
May 10, 2017: Endoscopy
https://www.readbyqxmd.com/read/28483662/the-management-of-polyps-in-female-reproductive-organs
#6
REVIEW
Vasilios Tanos, Kelsey Elizabeth Berry, Jaana Seikkula, Elissa Abi Raad, Andreas Stavroulis, Zaki Sleiman, Rudi Campo, Stephan Gordts
Polyps of the lower reproductive tract are found in 7.8-50% of women. It has been hypothesized that cytogenetic modifications on chromosomes 6, 7 and 12 as well as epigenetic factors involving enzyme and metabolic activities may cause polyps to develop. Cervical polyps found in 2-5% of cases are of low clinical significance and can cause, although rarely, post coital bleedings. Cervical polyps grow during pregnancy and mucorrhoea. Trans vaginal ultrasound (TVU) provides an excellent diagnostic technique to diagnose the size and the anatomic location of endometrial polyps (EPs)...
May 5, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28445255/peutz-jeghers-syndrome-with-intermittent-upper-intestinal-obstruction-a-case-report-and-review-of-the-literature
#7
Shou-Xing Duan, Guang-Huan Wang, Jun Zhong, Wen-Hui Ou, Ma-Xian Fu, Fu-Sheng Wang, Shu-Hua Ma, Jian-Hong Li
RATIONALE: Peutz-Jeghers syndrome (PJS) is an autosomal dominant genetic syndrome characterized by a unique type of gastrointestinal hamartomatous polyp associated with oral and anal mucocutaneous pigmentations. Peutz-Jeghers polyps occur most numerously in the small intestine but frequently in the colon and stomach, only a few cases have been reported in the duodenum. PATIENT CONCERN: A further family history survey discovered 10 out of 14 members of the family (in 4 generations) had mucocutaneous pigmentations, but many of them were living in rural areas where they had no access to specialized medical services, so none were checked with endoscopy for polyps of hamartoma...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28427752/spontaneously-arising-tumours-and-tumour-like-lesions-of-the-cervix-and-uterus-in-83-pet-guinea-pigs-cavia-porcellus
#8
C Laik-Schandelmaier, R Klopfleisch, S Schöniger, G Weiffenbach, M Staudacher, H Aupperle
Tumours and tumour-like lesions are rare findings in the genital system of guinea pigs. The aim of the present study was to characterize nodular lesions in the cervix and uterus of guinea pigs submitted for histopathological diagnosis. Samples from 83 pet animals were investigated. Cases included 64 surgically excised masses including complete uteri (n = 37), parts from uteri containing masses (n = 8), complete masses (n = 12) or samples from masses (n = 7) and 19 complete necropsy examinations. In 55 of the cases, only solitary changes were observed; in 28 cases two or more lesions were diagnosed...
April 17, 2017: Journal of Comparative Pathology
https://www.readbyqxmd.com/read/28414304/transforming-activity-and-therapeutic-targeting-of-c-terminal-binding-protein-2-in-apc-mutated-neoplasia
#9
E T Sumner, A T Chawla, A D Cororaton, J E Koblinski, R C Kovi, I M Love, B B Szomju, S Korwar, K C Ellis, S R Grossman
Overexpression of the transcriptional coregulators C-terminal binding proteins 1 and 2 (CtBP1 and 2) occurs in many human solid tumors and is associated with poor prognosis. CtBP modulates oncogenic gene expression programs and is an emerging drug target, but its oncogenic role is unclear. Consistent with this oncogenic potential, exogenous CtBP2 transformed primary mouse and human cells to anchorage independence similarly to mutant H-Ras. To investigate CtBP's contribution to in vivo tumorigenesis, Apc(min/+) mice, which succumb to massive intestinal polyposis, were bred to Ctbp2(+/-) mice...
April 17, 2017: Oncogene
https://www.readbyqxmd.com/read/28406434/preventive-effects-of-heat-killed-enterococcus-faecalis-strain-ec-12-on-mouse-intestinal-tumor-development
#10
Shingo Miyamoto, Masami Komiya, Gen Fujii, Takahiro Hamoya, Ruri Nakanishi, Kyoko Fujimoto, Shuya Tamura, Yurie Kurokawa, Maiko Takahashi, Tetsuo Ijichi, Michihiro Mutoh
Establishing effective methods for preventing colorectal cancer by so-called "functional foods" is important because the global burden of colorectal cancer is increasing. Enterococcus faecalis strain EC-12 (EC-12), which belongs to the family of lactic acid bacteria, has been shown to exert pleiotropic effects, such as anti-allergy and anti-infectious effects, on mammalian cells. In the present study, we aimed to evaluate the preventive effects of heat-killed EC-12 on intestinal carcinogenesis. We fed 5-week-old male and female Apc mutant Min mice diets containing 50 or 100 ppm heat-killed EC-12 for 8 weeks...
April 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28384603/raman-fiber-optical-method-for-colon-cancer-detection-cross-validation-and-outlier-identification-approach
#11
D Petersen, P Naveed, A Ragheb, D Niedieker, S F El-Mashtoly, T Brechmann, C Kötting, W H Schmiegel, E Freier, C Pox, K Gerwert
Endoscopy plays a major role in early recognition of cancer which is not externally accessible and therewith in increasing the survival rate. Raman spectroscopic fiber-optical approaches can help to decrease the impact on the patient, increase objectivity in tissue characterization, reduce expenses and provide a significant time advantage in endoscopy. In gastroenterology an early recognition of malign and precursor lesions is relevant. Instantaneous and precise differentiation between adenomas as precursor lesions for cancer and hyperplastic polyps on the one hand and between high and low-risk alterations on the other hand is important...
June 15, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28378694/the-role-of-narrow-band-imaging-in-colorectal-polyp-detection
#12
Irina Ioana Vișovan, Marcel Tanțău, Oliviu Pascu, Lidia Ciobanu, Alina Tanțău
Colonoscopic detection and removal of polyps represent the most important prevention method for colorectal cancer. We aimed to investigate the diagnostic yield of narrow band imaging (NBI) colonoscopy for polyp detection compared with standard colonoscopy. In this prospective study, 505 patients that underwent total colonoscopy were randomized into two groups: 226 patients in NBI group and 279 in non-NBI group (standard colonoscopy). The primary endpoints were polyp detection rate (PDR) and adenoma detection rate (ADR) in both groups...
April 5, 2017: Bosnian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28320628/clinical-significance-of-contralateral-reactive-lesion-in-vocal-fold-polyp-and-cyst
#13
Jung-Hae Cho, Yong-Sug Choi, Young-Hoon Joo, Young-Hak Park, Dong-Il Sun
OBJECTIVE: We investigated the clinical significance of contralateral reactive lesions in patients undergoing laryngeal microsurgery for benign vocal fold lesions such as vocal polyps and cysts. STUDY DESIGN: This was a retrospective, single institution cohort study. METHODS: Patient medical records were reviewed for demographic characteristics; acoustic, aerodynamic, and perceptual analyses; and Voice Handicap Index score before and after laryngeal microsurgery...
March 17, 2017: Journal of Voice: Official Journal of the Voice Foundation
https://www.readbyqxmd.com/read/28319601/effectiveness-of-double-balloon-enteroscopy-facilitated-polypectomy-in-paediatric-patients-with-peutz-jeghers-syndrome
#14
Dalia Belsha, Arun Urs, Thomas Attard, Mike Thomson
BACKGROUND: Sizable small-bowel (SB) polyps in Peutz-Jeghers syndrome (PJS) pose a high risk for intussusception, often necessitating laparotomy and intraoperative-enteroscopy (IOE). This series examines the effectiveness of double-balloon enteroscopy (DBE) facilitated polypectomy for pediatric patients with PJS. METHODS: Prospective analysis of collected data (6 years) on all patients with PJS referred for DBE-facilitated SB polypectomy at a pediatric tertiary-referral center...
March 17, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28319429/current-standards-and-new-developments-of-colorectal-polyp-management-and-resection-techniques
#15
Daniel von Renteln, Mickael Bouin, Alan N Barkun
Colonoscopy and endoscopic removal of precancerous polyps play an important role in colorectal cancer (CRC) prevention. Improved endoscopes and quality standards have led to an increasing polyp and adenoma detection rate. Optimal polyp resection techniques and management strategies are key for an effective colonoscopy practice. Areas covered: Strategies for how to improve diminutive polyp (polyps up to 5mm in size) management are discussed because of their high prevalence. Systematic removal of diminutive polyps leads to increasing costs of colonoscopy practice, while the effect on colorectal cancer prevention might be negligible...
March 20, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28316152/-long-term-follow-up-to-identify-the-rectal-potentially-malignant-nodules-in-female-by-digital-rectal-examination
#16
S S Wang, J Y Zhou, Z J Wang, S R Su, J Sun, R G W Sharen
Objective: To investigate the characteristics of the rectal potentially malignant nodules in female by digital rectal examination (DRE). Methods: Retrospectively, we collected the medical information and follow-up of rectal nodules cases diagnosed as benign by DRE during the health check-up in our hospital from Jan 2002 to Dec 2015. All nodules were recorded position, size, shape, hardness and mobility. Statistical analysis was performed to select the potentially malignant cases of postoperative pathological diagnosis and disappeared nodules followed up by DRE...
March 14, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28314199/unusual-ultrasound-appearance-of-small-bowel-intussusception-and-secondary-bowel-obstruction-in-a-child-with-peutz-jeghers-syndrome
#17
Lei Wu, Ramesh S Iyer, George T Drugas, A Luana Stanescu
Small bowel intussusception (SBI) in pediatric patients resolves spontaneously in the majority of cases. Pathologic small bowel intussusception with a lead point is rare in children. Ultrasound (US) is the preferred initial imaging study for the diagnosis of intussusception. We report a case of long-segment SBI and secondary bowel obstruction caused by a large hamartomatous polyp. This case emphasizes unique, atypical ultrasound findings that may be encountered in small bowel intussusception, with correlative radiographic, CT (computed tomography) and intra-operative findings...
May 2017: Clinical Imaging
https://www.readbyqxmd.com/read/28303455/duodenal-cancer-in-a-young-patient-with-peuts-jeghers-syndrome-harboring-an-entire-deletion-of-the-stk11-gene
#18
Satoshi Teramae, Koichi Okamoto, Kumiko Tanaka, Reika Matsumoto, Shinji Kitamura, Tetsuo Kimura, Masahiro Sogabe, Hiroshi Miyamoto, Naoki Muguruma, Yoshimi Bando, Mitsuo Shimada, Tetsuji Takayama
A 21-year-old woman with Peuts-Jeghers syndrome (PJS) was referred to our hospital for gastrointestinal surveillance. She had been diagnosed as having PJS from a young age based on her family history and the presence of mucocutaneous pigmentation on her lips and oral mucosa. Her mother and brother had PJS harboring an entire deletion of the STK11 gene. She had tetralogy of Fallot, atrial tachycardia, sick sinus syndrome, and mental retardation in her past history. Esophagogastroduodenoscopy identified a protruded lesion with a depressed area that occupied the lumen half-circumferentially in the duodenal second portion and also showed a 10-mm protruded lesion on the anterior wall of the lower gastric body...
June 2017: Clinical Journal of Gastroenterology
https://www.readbyqxmd.com/read/28289662/mucosa-associated-lymphoid-tissue-lymphoma-of-the-cecum-and-rectum-a-case-report
#19
Myung Jin Nam, Byung Chang Kim, Sung Chan Park, Chang Won Hong, Kyung Su Han, Dae Kyung Sohn, Weon Seo Park, Hee Jin Chang, Jae Hwan Oh
A colonic mucosa-associated lymphoid-tissue (MALT) lymphoma is relatively rare compared to lymphomas of the stomach or small intestine. We present a case of a MALT lymphoma in the cecum and rectum found during screening colonoscopy. A 54-year-old female, who had undergone right-breast-conserving surgery with axillary dissection due to an invasive ductal carcinoma and a left-breast excisional biopsy due to microcalcification following adjuvant chemoradiation therapy 3 years earlier, was found to have 3-mm-sized smooth elevated lesions in both the cecum and rectum...
February 2017: Annals of Coloproctology
https://www.readbyqxmd.com/read/28284884/risk-of-advanced-lesions-at-the-first-follow-up-colonoscopy-after-polypectomy-of-diminutive-versus-small-adenomatous-polyps-of-low-grade-dysplasia
#20
Orly Sneh Arbib, Valentina Zemser, Yaara Leibovici Weissman, Rachel Gingold-Belfer, Alex Vilkin, Sapir Eizenstein, Arnon Cohen, Doron Comaneshter, Shochat Tzipora, Yaron Niv, Yeuda Ringel, David Lieberman, Zohar Levi
BACKGROUND AND AIMS: The current guidelines for surveillance after polypectomy do not distinguish between diminutive (1-5 mm) and small (6-9 mm) polyps with low-grade dysplasia (LGD). We aimed to evaluate the risk for advanced neoplasia on follow-up colonoscopy. METHODS: We retrospectively analyzed 443 patients whose worst finding at index colonoscopy was polypectomy of 1 to 5 or 6 to 9 mm polyps with LGD and those who underwent a follow-up colonoscopy. RESULTS: During a mean follow-up of 32...
March 8, 2017: Gastrointestinal Endoscopy
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