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Alveolar repair

Matthew Tamplen, Tristan Fowler, Jeffery Markey, P Daniel Knott, Larry J Suva, Tamara Alliston
BACKGROUND: Anti-Sclerostin antibody (Scl-Ab) is a promising new bone anabolic therapy. Although anti-Scl-Ab stimulates bone formation and repair in the appendicular and axial skeleton, its efficacy in the craniofacial skeleton is still poorly understood. METHODS: Using an established model of Down syndrome-dependent bone deficiency, 10 Ts65Dn mice and 10 wild-type mice were treated weekly via i.v. tail vein injection with vehicle or anti-Sclerostin for 3 weeks and euthanized 1 week after...
March 9, 2018: Head & Neck
A Z Oz, S Ciger
Objective: The aim of the present study was to evaluate the changes of incisor root resorption associated with impacted maxillary canines and health of periodontal tissues around maxillary canines erupted with orthodontic treatment. Materials and Methods: Twenty patients with a unilateral palatally impacted maxillary canine were included in the study. Cone-beam computed tomography images taken before and after orthodontic treatment were compared with the contralateral canines serving as control teeth...
March 2018: Nigerian Journal of Clinical Practice
Xingjian Liu, Nikhil Khadtare, Hardek Patel, Ralph Stephani, Jerome Cantor
INTRODUCTION: A number of studies indicate that endothelin-1 (ET-1) may act as an inflammatory cell "gatekeeper," by regulating the influx of neutrophils following pulmonary injury. To further examine the role of ET-1 in modulating lung inflammation, hamsters were treated with an endothelin receptor antagonist (ERA), HJP272, either 1 h prior to intratracheal instillation of amiodarone (AM) or 24 h afterwards. METHODS: In both cases, the extent of lung injury and repair was determined by (1) histopathological changes; (2) neutrophil content in bronchoalveolar lavage fluid (BALF); (3) lung collagen content; (4) tumor necrosis factor receptor 1 expression by BALF macrophages; (5) BALF levels of (a) transforming growth factor beta-1, (b) stromal cell-derived factor 1 (commonly referred to as CXCL12), and (c) platelet-derived growth factor BB; (6) alveolar septal cell apoptosis...
March 7, 2018: Lung
Mariana N Machado, Flavia Mazzoli-Rocha, Natália V Casquilho, Tatiana Maron-Gutierrez, Victor H Ortenzi, Marcelo M Morales, Rodrigo S Fortunato, Walter A Zin
Murine papain-induced emphysema is a model that reproduces many of the features found in patients. Bone marrow-derived mononuclear cells (BMMC) have already been used to repair the alveolar epithelium in respiratory diseases, but not in the papain model. Thus, we hypothesized that BMMC could prevent the pathophysiological processes in papain-induced experimental emphysema. Female BALB/c mice received intratracheal instillation of 50 μL of saline (S groups) or papain (P groups, 10 IU/50 μl of saline) on days 1 and 7 of the experimental protocol...
2018: Frontiers in Physiology
Valérie Besnard, Rania Dagher, Tania Madjer, Audrey Joannes, Madeleine Jaillet, Martin Kolb, Philippe Bonniaud, Lynne A Murray, Matthew A Sleeman, Bruno Crestani
Periplakin is a component of the desmosomes that acts as a cytolinker between intermediate filament scaffolding and the desmosomal plaque. Periplakin is strongly expressed by epithelial cells in the lung and is a target antigen for autoimmunity in idiopathic pulmonary fibrosis. The aim of this study was to determine the role of periplakin during lung injury and remodeling in a mouse model of lung fibrosis induced by bleomycin. We found that periplakin expression was downregulated in the whole lung and in alveolar epithelial cells following bleomycin-induced injury...
March 8, 2018: JCI Insight
F Tirone, S Salzano, A Piattelli, V Perrotti, G Iezzi
OBJECTIVES: The aim of this study was to investigate for the first time the histological response of periodontium to mineral trioxide aggregate (MTA) and Biodentine in human experimental models. MATERIALS AND METHODS: Six patients scheduled for implant full-arch rehabilitation via the all-on-4 technique were randomly assigned to one of the two test groups: either to MTA or Biodentine treatment. For each patient, 2 teeth scheduled for strategic extraction were randomly assigned either to the test or to the control treatment...
March 6, 2018: Australian Dental Journal
Luis Morales Quinteros, Josep Bringué Roque, David Kaufman, Antonio Artigas Raventós
Important recent insights have emerged regarding the cellular and molecular role of carbon dioxide (CO2 ) and the effects of hypercapnia. The latter may have beneficial effects in patients with acute lung injury, affording reductions in pulmonary inflammation, lessened oxidative alveolar damage, and the regulation of innate immunity and host defenses by inhibiting the expression of inflammatory cytokines. However, other studies suggest that CO2 can have deleterious effects upon the lung, reducing alveolar wound repair in lung injury, decreasing the rate of reabsorption of alveolar fluid, and inhibiting alveolar cell proliferation...
February 24, 2018: Medicina Intensiva
Michael F Nyp, Sherry M Mabry, Angels Navarro, Heather Menden, Ricardo E Perez, Venkatesh Sampath, Ikechukwu I Ekekezie
The onset and degree of injury occurring in animals that develop hyperoxic acute lung injury (HALI) is dependent on age at exposure, suggesting that developmentally regulated pathways/factors must underlie initiation of the epithelial injury and subsequent repair. Type II TGFβ receptor interacting protein-1 (TRIP-1) is a negative regulator of TGFβ signaling, which we have previously shown is a developmentally regulated protein with modulatory effects on epithelial-fibroblastic signaling. The aim of this study was to assess if type II alveolar epithelial cells overexpressing TRIP-1 are protected against hyperoxia-induced epithelial injury, and in turn HALI...
March 2018: Physiological Reports
Kengo Nakajima, Ryo Kunimatsu, Kazuyo Ando, Toshinori Ando, Yoko Hayashi, Takuya Kihara, Tomoka Hiraki, Yuji Tsuka, Takaharu Abe, Masato Kaku, Hiroki Nikawa, Takashi Takata, Kazuo Tanne, Kotaro Tanimoto
Cleft lip and palate is the most common congenital anomaly in the orofacial region. Autogenous iliac bone graft, in general, has been employed for closing the bone defect at the alveolar cleft. However, such iliac bone graft provides patients with substantial surgical and psychological invasions. Consequently, development of a less invasive method has been highly anticipated. Stem cells from human exfoliated deciduous teeth (SHED) are a major candidate for playing a significant role in tissue engineering and regenerative medicine...
February 22, 2018: Biochemical and Biophysical Research Communications
Giacomo Sgalla, Bruno Iovene, Mariarosaria Calvello, Margherita Ori, Francesco Varone, Luca Richeldi
BACKGROUND: Idiopathic pulmonary fibrosis (IPF) is a chronic, progressive disease characterized by the aberrant accumulation of fibrotic tissue in the lungs parenchyma, associated with significant morbidity and poor prognosis. This review will present the substantial advances achieved in the understanding of IPF pathogenesis and in the therapeutic options that can be offered to patients, and will address the issues regarding diagnosis and management that are still open. MAIN BODY: Over the last two decades much has been clarified about the pathogenic pathways underlying the development and progression of the lung scarring in IPF...
February 22, 2018: Respiratory Research
Mingxuan Wu, Jie Wang, Yanning Zhang, Huijuan Liu, Fusheng Dong
BACKGROUND The ideal healing technique for periodontal tissue defects would involve the functional regeneration of the alveolar bone, cementum, and periodontal ligament, with new periodontal attachment formation. In this study, gingival fibroblasts were induced and a "sandwich" tissue-engineered complex (a tissue-engineered periodontal membrane between 2 tissue-engineered mineralized membranes) was constructed to repair periodontal defects. We evaluated the effects of gingival fibroblasts used as seed cells on the repair of periodontal defects and periodontal regeneration...
February 22, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
Fan Liang, Hyuma Leland, Breanna Jedrzejewski, Allyn Auslander, Seija Maniskas, Jordan Swanson, Mark Urata, Jeffrey Hammoudeh, William Magee
Alveolar cleft reconstruction has historically relied on autologous iliac crest bone grafting (ICBG), but donor site morbidity, pain, and prolonged hospitalization have prompted the search for bone graft substitutes. The authors evaluated bone graft substitutes with the highest levels of evidence, and highlight the products that show promise in alveolar cleft repair and in maxillary augmentation. This comprehensive review guides the craniofacial surgeon toward safe and informed utilization of biomaterials in the alveolar cleft...
February 14, 2018: Journal of Craniofacial Surgery
Li-Yin Hung, Taylor K Oniskey, Debasish Sen, Matthew F Krummel, Andrew E Vaughan, Noam A Cohen, De'Broski R Herbert
Trefoil factors are small secreted proteins that regulate tissue integrity and repair at mucosal surfaces, particularly in the gastrointestinal tract. However, their relative contribution(s) to controlling baseline lung function or the extent of infection-induced lung injury are unknown issues. Using irradiation bone marrow chimeras, we found that Trefoil factor 2 (TFF2) produced from both hematopoietic- and non-hematopoietic-derived cells is essential for host protection, proliferation of alveolar type 2 cells, and restoration of pulmonary gas exchange following infection with the hookworm parasite Nippostrongylus brasiliensis...
February 16, 2018: American Journal of Pathology
Jinfeng Yao, Haodong Chen, Qi Gao, Zhigang Liang
BACKGROUND: Alveolar cleft repair is an important step in the sequence of treatments for cleft lip and palate. Intrinsically osteoinductive materials have been the subject of research interest. OBJECTIVE: The aim of this study was to explore the use of osteoinductive biphasic calcium phosphate (BCP) ceramics to repair alveolar cleft defects in dogs. METHODS: We prepared two kinds of BCP ceramic with different physical characteristics: osteoinductive BCP (OBCP) and non-osteoinductive BCP (NBCP)...
2018: Bio-medical Materials and Engineering
Sara Vergel Posso, Nicolas Quesnot, João Alfredo Moraes, Lycia Brito-Gitirana, Emanuel Kennedy-Feitosa, Marina Valente Barroso, Luís Cristóvão Porto, Manuella Lanzetti, Samuel Santos Valença
Long-term exposure to cigarette smoke (CS) results in alveolar parenchyma destruction due to chronic inflammatory response and the imbalance between oxidants and antioxidants, and proteases and antiproteases. Emphysema is the main symptom of chronic obstructive pulmonary disease. Current treatment focuses on relieving respiratory symptoms, and inflammation resolution failure is an important pathophysiological element of the disease. Specialized pro-resolving mediators (SPMs) synthesized endogenously during resolution processes demonstrated beneficial effects in murine models of airway inflammation...
February 10, 2018: International Immunopharmacology
Jinfeng Liu, Wei Wang, Fengli Liu, Zhenguang Li
Acute respiratory distress syndrome (ARDS) mainly involves acute respiratory failure. In addition to this affected patients feel progressive arterial hypoxemia, dyspnea, and a marked increase in the work of breathing. The only clinical solution for the above pathological state is ventilation. Mechanical ventilation is necessary to support life in ARDs but it itself worsen lung injury and the term is known clinically as 'ventilation induced lung injury' (VILI). At the cellular level, respiratory epithelial cells are subjected to cyclic stretch, i...
February 2018: Experimental and Therapeutic Medicine
Reiko Sakurai, Cindy Lee, Humphrey Shen, Alan J Waring, Frans J Walther, Virender K Rehan
BACKGROUND: Despite improvements in perinatal care, bronchopulmonary dysplasia (BPD) in extremely premature infants has not decreased. Postnatal surfactant therapy provides symptomatic relief from respiratory distress syndrome, but does not translate into a reduction in BPD. Therefore, the search for effective interventions to prevent BPD continues. OBJECTIVES: Since PPAR-γ agonists have been demonstrated to promote neonatal lung maturation and injury repair, we hypothesized that a formulation of a PPAR-γ agonist, pioglitazone (PGZ) and a synthetic lung surfactant (a surfactant protein B peptide mimic, B-YL) combined would stimulate lung maturation and block hyperoxia-induced neonatal lung injury more effectively than either modality alone...
February 9, 2018: Neonatology
Beiyun Zhou, Per Flodby, Jiao Luo, Dan R Castillo, Yixin Liu, Fa-Xing Yu, Alicia McConnell, Bino Varghese, Guanglei Li, Nyam-Osor Chimge, Mitsuhiro Sunohara, Michael N Koss, Wafaa Elatre, Peter Conti, Janice M Liebler, Chenchen Yang, Crystal N Marconett, Ite A Laird-Offringa, Parviz Minoo, Kunliang Guan, Barry R Stripp, Edward D Crandall, Zea Borok
Claudins, the integral tight junction (TJ) proteins that regulate paracellular permeability and cell polarity, are frequently dysregulated in cancer; however, their role in neoplastic progression is unclear. Here, we demonstrated that knockout of Cldn18, a claudin family member highly expressed in lung alveolar epithelium, leads to lung enlargement, parenchymal expansion, increased abundance and proliferation of known distal lung progenitors, the alveolar epithelial type II (AT2) cells, activation of Yes-associated protein (YAP), increased organ size, and tumorigenesis in mice...
February 5, 2018: Journal of Clinical Investigation
Hong-Wei Wang, Chun-Yue Ma, Xing-Jun Qin, Chen-Ping Zhang
RATIONALE: Familial gigantiform cementoma (FGC) is a rare benign autosomal dominant fibrocemento-osseous lesion generally limited to the facial bones, typically in the anterior portion of the mandible; it is often associated with abnormalities of the long bones and prepubertal pathologic fractures. Owing to the small number of such patients, a uniform treatment criterion has not been established. This paper presents a patient with FGC who was treated in our department, and offers a systematic review of the patients reported in the literature...
December 2017: Medicine (Baltimore)
Tiankai Xu, Yuyu Zhang, Pengyu Chang, Shouliang Gong, Lihong Shao, Lihua Dong
Since radiotherapy is widely used in managing thoracic tumors, physicians have begun to realize that radiation-induced lung injury (RILI) seriously limits the effects of radiotherapy. Unfortunately, there are still no effective methods for controlling RILI. Over the last few decades numerous studies have reported the beneficial effects of mesenchymal stem cells (MSCs) on tissue repair and regeneration. MSCs can not only differentiate into lung alveolar epithelial cells and secrete anti-inflammatory factors, but they also deliver some vehicles for gene therapy in repairing the injured lung, which provides new ideas for managing RILI...
January 31, 2018: Stem Cell Research & Therapy
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