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Alveolar repair

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https://www.readbyqxmd.com/read/28093204/chin-symphysis-bone-allograft-and-platelet-rich-fibrin-is-the-combination-effective-in-repair-of-alveolar-cleft
#1
Bijan Movahedian Attar, Navid Naghdi, Milad Etemadi Sh, Mojdeh Mehdizadeh
PURPOSE: Secondary grafting of alveolar defects with iliac crest bone is a common treatment method in cleft patients. The aim of this study was to evaluate the effectiveness of the combination of symphysis bone, allograft, and platelet-rich fibrin in regeneration of alveolar defects compared with iliac bone graft. MATERIALS AND METHODS: In this randomized clinical trial, patients with unilateral alveolar defects were divided randomly into two categories. Group A comprised patients in whom the combination of chin symphysis bone plus allogeneic bone material plus leukocyte- and platelet-rich fibrin was considered for treatment...
December 26, 2016: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28087752/deficient-retinoid-driven-angiogenesis-may-contribute-to-failure-of-adult-human-lung-regeneration-in-emphysema
#2
John-Poul Ng-Blichfeldt, Joana Alçada, M Angeles Montero, Charlotte H Dean, Uta Griesenbach, Mark J Griffiths, Matthew Hind
BACKGROUND: Molecular pathways that regulate alveolar development and adult repair represent potential therapeutic targets for emphysema. Signalling via retinoic acid (RA), derived from vitamin A, is required for mammalian alveologenesis, and exogenous RA can induce alveolar regeneration in rodents. Little is known about RA signalling in the human lung and its potential role in lung disease. OBJECTIVES: To examine regulation of human alveolar epithelial and endothelial repair by RA, and characterise RA signalling in human emphysema...
January 13, 2017: Thorax
https://www.readbyqxmd.com/read/28062913/understanding-the-developmental-pathways-pulmonary-fibroblasts-may-follow-during-alveolar-regeneration
#3
REVIEW
Stephen McGowan
Although pulmonary alveolar interstitial fibroblasts are less specialized than their epithelial and endothelial neighbors, they play essential roles during development and in response to lung injury. At birth, they must adapt to the sudden mechanical changes imposed by the onset of respiration and to a higher ambient oxygen concentration. In diseases such as bronchopulmonary dysplasia and interstitial fibrosis, their adaptive responses are overwhelmed leading to compromised gas-exchange function. Thus, although fibroblasts do not directly participate in gas-exchange, they are essential for creating and maintaining an optimal environment at the alveolar epithelial-endothelial interface...
January 6, 2017: Cell and Tissue Research
https://www.readbyqxmd.com/read/28045819/volumetric-analysis-of-alveolar-bone-defect-using-three-dimensional-printed-models-versus-computer-aided-engineering
#4
Fengzhou Du, Binghang Li, Ningbei Yin, Yilin Cao, Yongqian Wang
Knowing the volume of a graft is essential in repairing alveolar bone defects. This study investigates the 2 advanced preoperative volume measurement methods: three-dimensional (3D) printing and computer-aided engineering (CAE). Ten unilateral alveolar cleft patients were enrolled in this study. Their computed tomographic data were sent to 3D printing and CAE software. A simulated graft was used on the 3D-printed model, and the graft volume was measured by water displacement. The volume calculated by CAE software used mirror-reverses technique...
December 30, 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28044311/effects-of-hypercapnia-on-the-lung
#5
Masahiko Shigemura, Emilia Lecuona, Jacob I Sznajder
Gases are sensed by lung cells and can activate specific intracellular signaling pathways, and thus have physiologic and pathophysiologic effects. Carbon dioxide (CO2 ), a primary product of oxidative metabolism, can be sensed by eukaryotic cells eliciting specific responses via recently identified signaling pathways. However, the physiological and pathophysiological effects of high CO2 (hypercapnia) on the lungs and specific lung cells, which are the primary site of CO2 elimination, are incompletely understood...
January 3, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28028929/molecular-genetic-and-biochemical-responses-in-human-airway-epithelial-cell-cultures-exposed-to-titanium-nanoparticles-in-vitro
#6
Elanur Aydın, Hasan Türkez, Fazıl Hacımüftüoğlu, Abdulgani Tatar, Fatime Geyikoğlu
Titanium nanoparticles (NPs) have very wide application areas such as paint, cosmetics, pharmaceuticals and biomedical applications. And, to translate these nanomaterials to the clinic and industrial domains, their safety needs to be verified, particularly in terms of genotoxicity and cytotoxicity. Therefore, in this study, we aimed to investigate of cytotoxicity and changes in gene expression profiles influenced by commonly titanium (as titanium carbide, titanium carbo-nitride, titanium (II) oxide, titanium (III) oxide, titanium (IV) oxide, titanium nitride, titanium silicon oxide) NPs in human alveolar epithelial (HPAEpiC) and pharynx (HPPC) cell lines in vitro since inhalation is an important pathway for exposure to these nanoparticles...
December 28, 2016: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28027239/skoog-primary-periosteoplasty-versus-secondary-alveolar-bone-grafting-in-unilateral-cleft-lip-and-alveolus-long-term-effects-on-alveolar-bone-formation-and-maxillary-growth
#7
Fatima Jabbari, Malin M Hakelius, Andreas L I Thor, Erika A Reiser, Valdemar T Skoog, Daniel J Nowinski
BACKGROUND: Clefts involving the alveolus are treated using one of two strategies: primary periosteoplasty at the time of lip repair or secondary alveolar bone grafting at mixed dentition. Most teams favor secondary alveolar bone grafting because of its high success rate, and concerns have been raised that primary periosteoplasty may interfere with maxillary growth. However, primary periosteoplasty may obviate the need for future bone grafting and is still practiced in some centers. Few studies compare the long-term outcomes of these two strategies...
January 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28025370/prognosis-after-surgical-treatment-of-trigeminal-neuropathy-with-a-pga-c-tube-report-of-10-cases
#8
Kenji Seo, Makoto Terumitsu, Yuji Inada, Tatsuo Nakamura, Keiji Shigeno, Yutaka Tanaka
OBJECTIVE: Although surgery using a polyglycolic acid-collagen (PGA-c) tube is effective for peripheral nerve injury-induced chronic hand pain, it has not been applied to trigeminal nerve lesions because of the difficult approach. We used a PGA-c tube during surgery for trigeminal neuropathy and evaluated its prognosis based on the outcomes. DESIGN: Case report. SETTING AND PATIENTS: In the dental anesthesia division of a university hospital, 11 patients with severe dysesthesia underwent surgical repair of a damaged lingual nerve (LN) or inferior alveolar nerve (IAN)...
December 2016: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28005737/nasoalveolar-molding-therapy-for-the-treatment-of-unilateral-cleft-lip-and-palate-improves-nasal-symmetry-and-maxillary-alveolar-dimensions
#9
María Gloria Ruíz-Escolano, Adoración Martínez-Plaza, Ricardo Fernández-Valadés, Rosario Cortés-Sánchez, María Angeles Muñoz-Miguelsanz, Eugenio Velasco-Ortega, María Bélen Perez-Ureña, Kamel Matar-Satuf, Antonio José España-López
OBJECTIVE: The aim of this study is to assess the esthetic and morphologic outcomes before surgery using nasoalveolar molding (NAM) therapy in children with unilateral cleft lip and palate. DESIGN: A prospective analysis was performed. SETTING: The study was carried out in the Congenital Malformations Craniofacial and Cleft Lip and Palate Unit, Hospital Virgen de las Nieves, Andalusian Health Service, Granada (Spain). PATIENTS: Twenty consecutively enrolled infants ranging in age from 7 to 30 days with nonsyndromic unilateral cleft lip and palate treated from 2008 to 2012...
November 2016: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/27994432/presurgical-nasoalveolar-molding-a-boon-to-facilitate-the-surgical-repair-in-infants-with-cleft-lip-and-palate
#10
Prabhakar Ramasetty Attiguppe, Y M Karuna, Chandrashekar Yavagal, Saraswathi V Naik, B M Deepak, Rekhamani Maganti, Chaithanya G Krishna
Cleft lip and palate (CLP) is the most common congenital craniofacial anomaly. Rehabilitation of CLP generally requires a team approach. Alveolar and nasal reconstruction for these patients is a challenge for the reconstructive surgeon. Various procedures have been attempted to reduce the cleft gap, so as to obtain esthetic results postsurgically. The presurgical nasoalveolar molding (PNAM) technique, developed by Grayson, is a new approach to presurgical infant orthopedics. PNAM reduces the severity of the initial cleft alveolar and nasal deformity...
October 2016: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/27979969/noncanonical-wnt-5a-signaling-impairs-endogenous-lung-repair-in-copd
#11
Hoeke A Baarsma, Wioletta Skronska-Wasek, Kathrin Mutze, Florian Ciolek, Darcy E Wagner, Gerrit John-Schuster, Katharina Heinzelmann, Andreas Günther, Ken R Bracke, Maylis Dagouassat, Jorge Boczkowski, Guy G Brusselle, Ron Smits, Oliver Eickelberg, Ali Ö Yildirim, Melanie Königshoff
Chronic obstructive pulmonary disease (COPD) is a leading cause of death worldwide. One main pathological feature of COPD is the loss of functional alveolar tissue without adequate repair (emphysema), yet the underlying mechanisms are poorly defined. Reduced WNT-β-catenin signaling is linked to impaired lung repair in COPD; however, the factors responsible for attenuating this pathway remain to be elucidated. Here, we identify a canonical to noncanonical WNT signaling shift contributing to COPD pathogenesis...
January 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/27957484/lipoxin-a4-promotes-lung-epithelial-repair-whilst-inhibiting-fibroblast-proliferation
#12
Shengxing Zheng, Vijay K D'Souza, Domokos Bartis, Rachel C A Dancer, Dhruv Parekh, Babu Naidu, Fang Gao-Smith, Qian Wang, Shengwei Jin, Qingquan Lian, David R Thickett
Therapy that promotes epithelial repair whilst protecting against fibroproliferation is critical for restoring lung function in acute and chronic respiratory diseases. Primary human alveolar type II cells were used to model the effects of lipoxin A4in vitro upon wound repair, proliferation, apoptosis and transdifferention. Effects of lipoxin A4 upon primary human lung fibroblast proliferation, collagen production, and myofibroblast differentiation were also assessed. Lipoxin A4 promoted type II cell wound repair and proliferation, blocked the negative effects of soluble Fas ligand/tumour necrosis factor α upon cell proliferation, viability and apoptosis, and augmented the epithelial cell proliferative response to bronchoaveolar lavage fluid (BALF) from acute respiratory distress syndrome (ARDS)...
July 2016: ERJ Open Research
https://www.readbyqxmd.com/read/27930933/calcitonin-induces-collagen-synthesis-and-osteoblastic-differentiation-in-human-periodontal-ligament-fibroblasts
#13
Yibo Wei, Qing Ye, Zhen Tang, Gang Tian, Qiang Zhu, Haocheng Gao, Dalin Wang, Zhizhong Cao
BACKGROUND: Extracellular matrix (ECM) secretion and osteogenic differentiation in periodontal ligament fibroblasts (PDLF) facilitate the neogenesis of alveolar bone, which is the cellular basis for alveolar bone repair. Calcitonin (CT) has been reported to play an important role in promoting ECM expression and inducing osteogenic differentiation in osteoblast, but its effects on PDLFs remain obscure. METHODS: The expression of CT, transforming growth factor-beta 1(TGF-β1) and bone morphogenetic protein (BMP) in gingival crevicular fluid (GCF) was measured by ELISA...
February 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/27923370/the-cellular-kinetics-of-lung-alveolar-epithelial-cells-and-its-relationship-with-lung-tissue-repair-after-acute-lung-injury
#14
Ling Zeng, Xue-Tao Yang, Hai-Sheng Li, Yong Li, Ce Yang, Wei Gu, Yin-Han Zhou, Juan Du, Hai-Yan Wang, Jian-Hui Sun, Da-Lin Wen, Jian-Xin Jiang
BACKGROUND: Organ regeneration in mammals is hypothesized to require a functional pool of stem or progenitor cells, but the role of these cells in lung regeneration is unknown. METHODS: Based on the fact that postnatal regeneration of alveolar tissue has been attributed to alveolar epithelial cells, we established a hemorrhagic shock and Lipopolysaccharide (LPS) lung injury model. Using this model, we analyzed the cellular kinetics of lung alveolar epithelial cells...
December 7, 2016: Respiratory Research
https://www.readbyqxmd.com/read/27909823/gelatin-microspheres-containing-calcitonin-gene-related-peptide-or-substance-p-repair-bone-defects-in-osteoporotic-rabbits
#15
Jianghao Chen, Wei Liu, Jinxiu Zhao, Cong Sun, Jie Chen, Kaijin Hu, Linlin Zhang, Yuxiang Ding
OBJECTIVES: To investigate the therapeutic effect of gelatin microspheres containing different concentrations of calcitonin gene-related peptide (CGRP) or substance P on repairing bone defects in a rabbit osteoporosis model. RESULTS: Gelatin microspheres containing different concentrations of CGRP or substance P promoted osteogenesis after 3 months in a rabbit osteoporotic bone defective model. From micro-computed tomography imaging results, 10 nM CGRP was optimal for increasing the trabecular number and decreasing the trabecular bone separation degree; similar effects were observed with the microspheres containing 1 µM substance P...
December 1, 2016: Biotechnology Letters
https://www.readbyqxmd.com/read/27886850/cellular-senescence-and-autophagy-in-the-pathogenesis-of-chronic-obstructive-pulmonary-disease-copd-and-idiopathic-pulmonary-fibrosis-ipf
#16
REVIEW
Kazuyoshi Kuwano, Jun Araya, Hiromichi Hara, Shunsuke Minagawa, Naoki Takasaka, Saburo Ito, Kenji Kobayashi, Katsutoshi Nakayama
Aging is associated with impairments in homeostasis. Although aging and senescence are not equivalent, the number of senescent cells increases with aging. Cellular senescence plays important roles in tissue repair or remodeling, as well as embryonic development. Autophagy is a process of lysosomal self-degradation that maintains a homeostatic balance between the synthesis, degradation, and recycling of cellular proteins. Autophagy diminishes with aging; additionally, accelerated aging can be attributed to reduced autophagy...
November 2016: Respiratory Investigation
https://www.readbyqxmd.com/read/27861515/involvement-of-igf1r-in-bronchiolar-epithelial-regeneration-role-during-repair-kinetics-after-selective-club-cell-ablation
#17
Icíar P López, Sergio Piñeiro-Hermida, Rosete S Pais, Raquel Torrens, Andreas Hoeflich, José G Pichel
Regeneration of lung epithelium is vital for maintaining airway function and integrity. An imbalance between epithelial damage and repair is at the basis of numerous chronic lung diseases such as asthma, COPD, pulmonary fibrosis and lung cancer. IGF (Insulin-like Growth Factors) signaling has been associated with most of these respiratory pathologies, although their mechanisms of action in this tissue remain poorly understood. Expression profiles analyses of IGF system genes performed in mouse lung support their functional implication in pulmonary ontogeny...
2016: PloS One
https://www.readbyqxmd.com/read/27836901/deformation-induced-transitional-myofibroblasts-contribute-to-compensatory-lung-growth
#18
Robert D Bennett, Alexandra B Ysasi, Willi L Wagner, Cristian D Valenzuela, Akira Tsuda, Saumyadipta Pyne, Shuqiang Li, Jonna Grimsby, Prapti Pokharel, Kenneth J Livak, Maximilian Ackermann, Paul Blainey, Steven J Mentzer
In many mammals, including humans, removal of one lung (pneumonectomy) results in the compensatory growth of the remaining lung. Compensatory growth involves not only an increase in lung size, but also an increase in the number of alveoli in the peripheral lung; however, the process of compensatory neoalveolarization remains poorly understood. Here, we show that the expression of α-smooth muscle actin (SMA)-a cytoplasmic protein characteristic of myofibroblasts-is induced in the pleura following pneumonectomy...
January 1, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/27836807/surfactant-protein-a-a-key-player-in-lung-homeostasis
#19
Nadia Nathan, Jessica Taytard, Philippe Duquesnoy, Guillaume Thouvenin, Harriet Corvol, Serge Amselem, Annick Clement
The respiratory tract is continually exposed to various insults that are a permanent threat to the maintenance of lung homeostasis. Repair of the parenchyma structure, particularly of the alveolar epithelium, requires complex cellular strategies. Among the molecular components that play an important role in these processes are the surfactant proteins (SPs), particularly SP-A. The present review examines current evidence regarding the role of SP-A in lung host defence mechanisms through its implication in innate/adaptive immunity of the lung and epithelium integrity and repair...
December 2016: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/27824330/effect-of-sustained-pdgf-nonviral-gene-delivery-on-repair-of-tooth-supporting-bone-defects
#20
A B Plonka, B Khorsand, N Yu, J V Sugai, A K Salem, W V Giannobile, S Elangovan
Recombinant human platelet-derived growth factor-BB (rhPDGF-BB) promotes soft tissue and bone healing, and is Food and Drug Administration-approved for treatment of diabetic ulcers and periodontal defects. The short half-life of topical rhPDGF-BB protein application necessitates bolus, high-dose delivery. Gene therapy enables sustained local growth factor production. A novel gene activated matrix delivering polyplexes of polyethylenimine (PEI)-plasmid DNA encoding PDGF was evaluated for promotion of periodontal wound repair in vivo...
December 8, 2016: Gene Therapy
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