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https://www.readbyqxmd.com/read/28441338/effects-of-3d-printed-polycaprolactone-%C3%AE-tricalcium-phosphate-membranes-on-guided-bone-regeneration
#1
Jin-Hyung Shim, Joo-Yun Won, Jung-Hyung Park, Ji-Hyeon Bae, Geunseon Ahn, Chang-Hwan Kim, Dong-Hyuk Lim, Dong-Woo Cho, Won-Soo Yun, Eun-Bin Bae, Chang-Mo Jeong, Jung-Bo Huh
This study was conducted to compare 3D-printed polycaprolactone (PCL) and polycaprolactone/β-tricalcium phosphate (PCL/β-TCP) membranes with a conventional commercial collagen membrane in terms of their abilities to facilitate guided bone regeneration (GBR). Fabricated membranes were tested for dry and wet mechanical properties. Fibroblasts and preosteoblasts were seeded into the membranes and rates and patterns of proliferation were analyzed using a kit-8 assay and by scanning electron microscopy. Osteogenic differentiation was verified by alizarin red S and alkaline phosphatase (ALP) staining...
April 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28440741/standardized-rat-model-testing-effects-of-inflammation-and-grafting-on-extraction-healing
#2
Emily S Willett, Jingpeng Liu, Molly Berke, Peter J Giannini, Marian Schmid, Zhenshan Jia, Xiaobei Wang, Xiaoyan Wang, Kaeli Samson, Fang Yu, Dong Wang, Ali Nawshad, Richard A Reinhardt
BACKGROUND: Loss of the alveolar ridge width and height following tooth extraction is well-documented, but models to evaluate ridge preservation are neither standardized nor cost-effective. This rat model characterizes the pattern of bone turnover and inflammation after extraction and bone grafting with or without local simvastatin (SIM). METHODS: Fifty retired-breeder rats underwent extraction of the right maxillary first molar and standard surgical defect creation under inhalation/local anesthesia...
April 25, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28440496/pu-1-serves-a-critical-role-in-the-innate-defense-against-aspergillus%C3%A2-fumigatus-via-dendritic-cell-associated-c-type-lectin-receptor-1-and-toll-like-receptors-2-and-4-in-thp-1-derived-macrophages
#3
Chenyang Liu, Min Wang, Wenkui Sun, Feng Cai, Shen Geng, Xin Su, Yi Shi
Aspergillus fumigatus (A. fumigatus) is one of the most common fungal pathogens of invasive pulmonary aspergillosis (IPA), which may be life threatening in immunocompromised individuals. The dendritic cell-associated C-type lectin receptor (Dectin-1), toll‑like receptor (TLR)-2 and TLR-4 are major pattern recognition receptors in alveolar macrophages that recognize A. fumigatus components. The PU.1 transcription factor is known to be important for the transcriptional control of these three receptors in mature macrophages...
April 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28438206/exogenous-gene-transfer-of-rab-3-8-small-gtpase-ameliorates-aberrant-lung-surfactant-homeostasis-in-ruby-rats
#4
Kazuhiro Osanai, Keisuke Nakase, Takashi Sakuma, Kazuaki Nishiki, Masafumi Nojiri, Ryo Kato, Masatoshi Saito, Yuki Fujimoto, Shiro Mizuno, Hirohisa Toga
BACKGROUND: Rab(3)8 small GTPase regulates intracellular transport in melanocytes and alveolar type II epithelial cells. Ruby rats carrying Rab(3)8 and other gene mutations exhibit oculocutaneous albinism, bleeding diathesis, and hence, are a rat model of human Hermansky-Pudlak syndrome (HPS). We previously showed that Long Evans Cinnamon (LEC) rats, one strain of the Ruby rats, developed aberrant lung surfactant homeostasis with remarkably enlarged lamellar bodies in alveolar type II cells...
April 24, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28433707/genetic-susceptibility-to-toxicologic-lung-responses-among-inbred-mouse-strains-following-exposure-to-carbon-nanotubes-and-profiling-of-underlying-gene-networks
#5
Evan A Frank, Vinicius S Carreira, Kumar Shanmukhappa, Mario Medvedovic, Daniel R Prows, Jagjit S Yadav
The risk of human exposure to fiber nanoparticles has risen in recent years due to increases in the manufacture and utilization of carbon nanotubes (CNTs). CNTs are present as airborne particulates in occupational settings and their hazard potential has been demonstrated in experimental lung exposure studies using inbred mouse strains. However, it is not known whether different inbred strains differ in lung responses to CNTs by virtue of their genetics. In this work, common inbred strains (BALB/c, C57Bl/6, DBA/2, and C3H/He) were exposed to CNTs via oropharyngeal aspiration and lung histology and bronchoalveolar lavage (BAL) samples were evaluated over 28days with the objective of evaluating sensitivity/resistance among strains...
April 19, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28429477/the-emerging-role-of-maxillofacial-radiology-in-the-diagnosis-and-management-of-patients-with-complex-periodontitis
#6
REVIEW
William C Scarfe, Bruno Azevedo, Lucas R Pinheiro, Menik Priaminiarti, Marcelo A O Sales
Contemporary periodontal therapy has evolved to become more interdisciplinary and increasingly involves more complex treatments, including bone and soft-tissue regenerative procedures. Therapeutic options require an imaging modality or combination of techniques that are capable of providing a diagnostic osseous baseline and facilitating quantification of smaller increments of bony change, both loss and additive, which are comparable over time. Intra-oral and panoramic radiography are the modalities most commonly used to identify the location, quantify the amount and the pattern of alveolar bone loss and determine response to therapy...
June 2017: Periodontology 2000
https://www.readbyqxmd.com/read/28429277/primary-ewing-sarcoma-primitive-neuroectodermal-tumor-of-the-kidney-a-clinicopathologic-study-of-23-cases
#7
Paari Murugan, Priya Rao, Pheroze Tamboli, Bogdan Czerniak, Charles C Guo
Primary Ewing sarcoma / primitive neuroectodermal tumor (ES) of the kidney is a rare neoplasm with limited clinicopathologic data. We report 23 such cases with no history of ES elsewhere in the body. The patients included 13 male and 10 female, aged 8-70 years (mean, 31 years). The average tumor size was 11.7 cm (range, 5-20 cm). Microscopic analysis showed predominantly lobular growth (n = 14), with focal papillary (n = 3), alveolar (n = 1), and hemangiopericytoma-like (n = 1) patterns. Several tumors (n = 11) exhibited robust mitotic activity (>10 mitoses/10 high-power fields)...
April 20, 2017: Pathology Oncology Research: POR
https://www.readbyqxmd.com/read/28424686/mucosal-and-systemic-immune-responses-to-influenza-h7n9-antigen-ha1-2-co-delivered-intranasally-with-flagellin-or-polyethyleneimine-in-mice-and-chickens
#8
Li Song, Dan Xiong, Hongqin Song, Lili Wu, Meihua Zhang, Xilong Kang, Zhiming Pan, Xinan Jiao
Consecutive cases of human infection with H7N9 influenza viruses since 2013 in China have prompted efforts to develop an effective treatment. Subunit vaccines introduced by intranasal administration can block an infection at its primary site; flagellin (fliC) and polyethyleneimine (PEI) have been shown to be potent adjuvants. We previously generated the hemagglutinin (HA)1-2-fliC fusion protein consisting of the globular head domain (HA1-2; amino acids 62-284) of HA fused with Salmonella typhimurium fliC. In the present study, we investigated its effectiveness of both flagellin and PEI as mucosal adjuvants for the H7N9 influenza subunit vaccine...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28408205/temporal-spatial-and-phenotypical-changes-of-pdgfr%C3%AE-expressing-fibroblasts-during-late-lung-development
#9
Mehari Endale, Shawn Ahlfeld, Erik Bao, Xiaoting Chen, Jenna Green, Zach Bess, Matthew T Weirauch, Yan Xu, Anne Karina Perl
Many studies have investigated the source and role of epithelial progenitors during lung development; such information is limited for fibroblast populations and their complex role in the developing lung. In this study, we characterized the spatial location, mRNA expression and Immunophenotyping of PDGFRα(+) fibroblasts during sacculation and alveolarization. Confocal microscopy identified spatial association of PDGFRα expressing fibroblasts with proximal epithelial cells of the branching bronchioles and the dilating acinar tubules at E16...
April 11, 2017: Developmental Biology
https://www.readbyqxmd.com/read/28402755/distribution-of-fcrn-across-species-and-tissues
#10
Sari Latvala, Bjoern Jacobsen, Michael B Otteneder, Annika Herrmann, Sven Kronenberg
The neonatal Fc receptor (FcRn) is a major histocompatibility complex class I type molecule that binds to, transports, and recycles immunoglobulin G (IgG) and albumin, thereby protecting them from lysosomal degradation. Therefore, besides the knowledge of FcRn affinity, FcRn protein expression is critical in understanding the pharmacokinetic behavior of Fc-containing biotherapeutics such as monoclonal antibodies. The goal of this investigation was to achieve for the first time a comparative assessment of FcRn distribution across a variety of tissues and species...
April 1, 2017: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/28401582/histological-features-of-malignancy-correlate-with-growth-patterns-and-patient-outcome-in-lung-adenocarcinoma
#11
Johanna M Mäkinen, Kirsi Laitakari, Shirley Johnson, Riitta Mäkitaro, Risto Bloigu, Paavo Pääkkö, Elisa Lappi-Blanco, Riitta Kaarteenaho
AIMS: Until the launch of the International Association for the Study of Lung Cancer/American Thoracic Society/European Respiratory Society (IASLC/ATS/ERS) adenocarcinoma classification in 2011, there were no uniform histological grading criteria for pulmonary adenocarcinomas. The current classification highlights the prognostic importance of the various histological growth patterns observed in these morphologically heterogeneous neoplasias. In this study, we aimed to evaluate the classic histological parameters of malignancy in correlation with the growth patterns and patient outcome in a series of 112 surgically operated stage I-IV lung adenocarcinomas...
April 12, 2017: Histopathology
https://www.readbyqxmd.com/read/28384521/rna-isolation-from-alveolar-bone-and-gene-expression-analysis-of-rank-rankl-and-opg-a-new-tool-to-monitor-bone-remodeling-and-healing-in-different-bone-substitutes-used-for-prosthetic-rehabilitation
#12
Elena Canciani, Claudia Dellavia, Monica Gioia Marazzi, Davide Augusti, Daniela Carmagnola, Elena Vianello, Luigi Canullo, Emanuela Galliera
OBJECTIVE: (i) To validate a simple and efficient method for extracting high quality RNA from small samples of bone tissue, (ii) to test its application on limited amounts of grafted oral bone and (iii) to analyze the gene expression of the OPG/RANK/RANKL system and IL-6 in "spontaneous healing" and grafted tissue. DESIGN: 26 patients in need of extraction of one lower molar tooth were divided in 3 groups. In group A (8 patients) the alveolar socket was left for spontaneous healing, in group B (8 patients) it was filled with a hydroxyapatite scaffold while in group C (10 patients) it was filled with hydroxyapatite granules...
March 28, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28381737/alveolar-growth-in-japanese-infants-a-comparison-between-now-and-40-years-ago
#13
Hiroki Imai, Tetsuhide Makiguchi, Aiko Arakawa, Ayako Tashiro, Takuro Yonezu, Seikou Shintani
To investigate differences in alveolar growth during the primary dentition period among different age groups, dental arch width, length, and height were measured in 93 dental arch plaster models obtained from 4-year-olds born between 1968 and 1974, 88 from 5-year-olds born between 1968 and 1974 (70s group), 61 from 4-year-olds born between 2007 and 2009, and 56 from 5-year-olds born between 2006 and 2008 (2000s group). A comparison was also performed to determine whether there was any difference in change between 4 and 5 years of age...
2017: Bulletin of Tokyo Dental College
https://www.readbyqxmd.com/read/28381153/alk-negative-anaplastic-large-cell-lymphoma-presenting-as-an-extranodal-soft-tissue-mass-with-an-unusual-alveolar-growth-pattern
#14
Badr AbdullGaffar, Rania M Seliem
Anaplastic large cell lymphoma (ALCL) is a T-cell lymphoma which has been recognized to have a variable clinical presentation and a broad spectrum of histomorphologic features. Its variable histomorphologic appearances are sometimes diagnostically challenging for the pathologists since they can mimic sarcomas, melanomas and undifferentiated carcinomas. To our knowledge, a previous case of axillary soft-tissue mass of ALK-positive ALCL with an alveolar growth pattern has been so far reported in the literature...
March 1, 2017: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/28380437/nell1-whose-high-expression-correlates-with-negative-outcomes-has-different-methylation-patterns-in-alveolar-and-embryonal-rhabdomyosarcoma
#15
Lucia Tombolan, Elena Poli, Paolo Martini, Angelica Zin, Chiara Romualdi, Gianni Bisogno, Gerolamo Lanfranchi
Rhabdomyosarcoma (RMS), which represents the most frequent soft tissue sarcoma in pediatric populations, is classified into two major subtypes: embryonal RMS (ERMS) and alveolar RMS (ARMS). ARMS subtype, which shows greater aggressiveness and proneness to metastasis with respect to ERMS, are characterized, in about 75% of cases, by specific chromosomal translocations that involve PAX and FOXO1 genes. Many findings have demonstrated that PAX/FOXO1-positive ARMS have a worse prognosis than PAX/FOXO1-negative ones and that distinct molecular features characterize RMS with different gene fusion statuses...
March 23, 2017: Oncotarget
https://www.readbyqxmd.com/read/28379718/sonic-hedgehog-signaling-regulates-myofibroblast-function-during-alveolar-septum-formation-in-murine-postnatal-lung
#16
Matthias C Kugler, Cynthia A Loomis, Zhicheng Zhao, Jennifer C Cushman, Li Liu, John S Munger
Sonic Hedgehog (Shh) signaling regulates mesenchymal proliferation and differentiation during embryonic lung development. In the adult lung, Shh signaling maintains mesenchymal quiescence and is dysregulated in diseases such as IPF and COPD. Our previous data implicated a role for Shh in postnatal lung development. Here we report a detailed analysis of Shh signaling during murine postnatal lung development. We show that Shh pathway expression and activity during alveolarization (P0-P14) are distinct from those during maturation (P14-P24)...
April 5, 2017: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/28367383/multiple-calcifying-pseudoneoplasms-of-the-neuraxis
#17
Leonardo B Brasiliense, Dennis W Dickson, Raouf E Nakhleh, Rabih G Tawk, Robert Wharen
Calcifying pseudoneoplasms of the neuraxis (CAPNONs) are extremely rare tumors that are frequently misdiagnosed and overlooked by clinicians. To date, only 40 intracranial lesions have been reported, and in all instances, they were found as a solitary calcified mass. To our knowledge, the current case report is the first to illustrate the development of multiple intraaxial CAPNONs and shed more light on the origin of these lesions. We discuss the case of a 67-year-old woman who presented with a six-year history of recurrent seizures...
February 21, 2017: Curēus
https://www.readbyqxmd.com/read/28363864/alveolar-septal-patterning-during-compensatory-lung-growth-part-ii-the-effect-of-parenchymal-pressure-gradients
#18
Shimon Haber, Michal Weisbord, Steven J Mentzer, Akira Tsuda
In most mammals, compensatory lung growth occurs after the removal of one lung (pneumonectomy). Although the mechanism of alveolar growth is unknown, the patterning of complex alveolar geometry over organ-sized length scales is a central question in regenerative lung biology. Because shear forces appear capable of signaling the differentiation of important cells involved in neoalveolarization (fibroblasts and myofibroblasts), interstitial fluid mechanics provide a potential mechanism for the patterning of alveolar growth...
March 28, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28359937/pilot-study-on-laser-propagation-in-maxillary-and-mandibular-bone-grey-level-image-analysis-for-optical-measurements
#19
Monalisa Jacob Guiselini, Alessandro Melo Deana, Daniela de Fátima Teixeira da Silva, Nelson Hideyoshi Koshoji, Raquel Agnelli Mesquita-Ferrari, Katia Llanos do Vale, Marcelo Betti Mascaro, Simone Aleksandra de Moraes, Sandra Kalil Bussadori, Kristianne Porta Santos Fernandes
BACKGROUND: Bone tissue anatomy, density and porosity vary among subjects in different phases of life and even within areas of a single specimen. The optical characteristics of changes in bone tissue are analyzed based on these properties. Photobiomodulation has been used to improve bone healing after surgery or fractures. Thus, knowledge on light propagation is of considerable importance to the obtainment of successful clinical outcomes. OBJECTIVE: This study determines light penetration and distribution in human maxillary and mandibular bones in three different regions (anterior, middle, and posterior)...
March 27, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28341449/do-antibiotics-decrease-the-risk-of-inflammatory-complications-after-third-molar-removal-in-community-practices
#20
Melanie S Lang, Martin L Gonzalez, Thomas B Dodson
PURPOSE: The role of antibiotic use in third molar (M3) surgery is controversial. The purpose of this study was to measure the association between antibiotic use and postoperative inflammatory complications after M3 surgery in the community office-based ambulatory private practice setting. MATERIALS AND METHODS: The authors designed and implemented a prospective cohort study and enrolled a sample composed of patients who had at least one M3 removed in a private practice setting by oral and maxillofacial surgeons participating in a practice-based research collaborative from June 2011 through May 2012...
February 2017: Journal of Oral and Maxillofacial Surgery
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