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https://www.readbyqxmd.com/read/28812320/the-relationship-between-periodontal-disease-tooth-loss-and-decreased-skeletal-bone-mineral-density-in-ageing-women
#1
Ivana Savić Pavičin, Jelena Dumančić, Tomislav Jukić, Tomislav Badel
AIM: Osteoporosis and periodontitis are both chronic diseases characterised by bone loss. Potential association is of great clinical importance because of multifactorial aetiology and common risk factors. The aim of this study was to determine relationship between bone mineral density (BMD), tooth loss and periodontal status taking into account age, number of years since onset of menopause and educational level. With increasing age, number of years since onset of menopause and lower educational level, decreased BMD, deteriorating periodontal status and greater tooth loss are expected...
August 15, 2017: Gerodontology
https://www.readbyqxmd.com/read/28812111/syndrome-of-inappropriate-anti-diuresis-induces-volume-dependent-hypercalciuria
#2
J Grellier, A Jaafar, A Martin, M El Alaoui, C Lebely, I Tack, M Vallet
Hyponatremia is associated with bone demineralization. We hypothesized that, during hyponatremia, calciuria and calcium balance depend on volemic status. We evaluated calciuria in patients with hyponatremia, secondary to SIAD or hypovolemia. Patients with SIAD exhibited a volemic expansion that was associated with hypercalciuria. Calciuria was proportional to markers of volemia. INTRODUCTION: Chronic mild hyponatremia has been associated with bone demineralization of unknown mechanisms...
August 15, 2017: Osteoporosis International
https://www.readbyqxmd.com/read/28811640/a-reciprocal-interaction-between-%C3%AE-catenin-and-osterix-in-cementogenesis
#3
Hwajung Choi, Tak-Heun Kim, Siqin Yang, Jeong-Chae Lee, Hyung-Keun You, Eui-Sic Cho
Although accumulating evidence indicates that both β-catenin and osterix (Osx) are essential for bone and tooth development, few studies have investigated the interaction of these two key proteins in the context of cementogenesis. In this study, we used transgenic mice with constitutively active β-catenin and inactive Osx in the dental mesenchyme to address this question. We found that cementoblasts with constitutively active β-catenin require Osx to produce excessive cellular cementum, and that ablation of Osx prevents this abnormal accumulation...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811384/loss-of-spdef-and-gain-of-tgfbi-activity-after-androgen-deprivation-therapy-promote-emt-and-bone-metastasis-of-prostate-cancer
#4
Wei-Yu Chen, Yuan-Chin Tsai, Hsiu-Lien Yeh, Florent Suau, Kuo-Ching Jiang, Ai-Ning Shao, Jiaoti Huang, Yen-Nien Liu
Androgen deprivation therapy (ADT) targeting the androgen receptor (AR) is a standard therapeutic regimen for treating prostate cancer. However, most tumors progress to metastatic castration-resistant prostate cancer after ADT. We identified the type 1, 2, and 4 collagen-binding protein transforming growth factor-β (TGFβ)-induced protein (TGFBI) as an important factor in the epithelial-to-mesenchymal transition (EMT) and malignant progression of prostate cancer. In prostate cancer cell lines, AR signaling stimulated the activity of the transcription factor SPDEF, which repressed the expression of TGFBI ADT, AR antagonism, or overexpression of TGFBI inhibited the activity of SPDEF and enhanced the proliferation rates of prostate cancer cells...
August 15, 2017: Science Signaling
https://www.readbyqxmd.com/read/28811280/dan-nbl1-promotes-collective-neural-crest-migration-by-restraining-uncontrolled-invasion
#5
Rebecca McLennan, Caleb M Bailey, Linus J Schumacher, Jessica M Teddy, Jason A Morrison, Jennifer C Kasemeier-Kulesa, Lauren A Wolfe, Madeline M Gogol, Ruth E Baker, Philip K Maini, Paul M Kulesa
Neural crest cells are both highly migratory and significant to vertebrate organogenesis. However, the signals that regulate neural crest cell migration remain unclear. In this study, we test the function of differential screening-selected gene aberrant in neuroblastoma (DAN), a bone morphogenetic protein (BMP) antagonist we detected by analysis of the chick cranial mesoderm. Our analysis shows that, before neural crest cell exit from the hindbrain, DAN is expressed in the mesoderm, and then it becomes absent along cell migratory pathways...
August 15, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28810851/chitosan-in-viscosupplementation-in-vivo-effect-on-rabbit-subchondral-bone
#6
R Rieger, C Boulocher, S Kaderli, T Hoc
BACKGROUND: To investigate the effect of intra-articular injection of Chitosan (Cs) added to hyaluronic acid (HA) on subchondral bone during osteoarthritis (OA), microarchitectural parameters and mineral density were measured in a rabbit model of early OA. A novel hybrid hydrogel adding reacetylated Cs of fungal origin to HA was compared to high molecular weight HA commercial formulation. METHOD: Eighteen rabbits underwent unilateral anterior cruciate ligament transection (ACLT) and were divided into three groups (Saline-group, HA-group and Hybrid-group) depending on the intra-articular injection compound...
August 15, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28810629/inhibition-of-microrna-34a-ameliorates-murine-collagen-induced-arthritis
#7
Qiujie Dang, Fan Yang, Hongwei Lei, Xin Liu, Minglu Yan, He Huang, Xuemei Fan, Yang Li
Rheumatoid arthritis (RA) is one of the most frequently occurring autoimmne diseases, with symptoms including synovium hyperplasia, immune disorder, cartilage damage and bone resorption. It has previously been demonstrated that microRNA-34a (miR-34a) may participate in cell apoptosis, immune activation and bone metabolism, therefore the present study investigated the effects of miR-34a on RA. Collagen-induced arthritic (CIA) mice were employed as a murine model of experimental arthritis, and it was demonstrated that the level of miR-34a in the spleens, lymph nodes and synovium was increased in the CIA mice compared with normal DBA/1j mice...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810621/effect-of-isopsoralen-on-smad7-in-osteoblastic-mc3t3-e1-cells
#8
Huicun Zhang, Na Ta
The primary pathological change in postmenopausal osteoporosis (PM-OP) is bone collagen loss caused by estrogen depletion. Osteoblasts synthesize type I collagen, which composes the organic matrix of bone. Although isopsoralen stimulates osteoblastic cell proliferation and differentiation, transforming growth factor (TGF)-β1 is an important cell signaling factor for stimulating collagen synthesis. To explore the association between isopsoralen and the synthesis of collagen in vitro, the molecular and biological association between isopsoralen and TGF-β signaling was examined...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28810524/pioglitazone-induced-bone-loss-in-diabetic-rats-and-its-amelioration-by-berberine-a-portrait-of-molecular-crosstalk
#9
Mohammad Adil, Mohd Nizam Mansoori, Divya Singh, Amit Dattatraya Kandhare, Manju Sharma
Diabetes mellitus and osteoporosis both are high prevalence disorders, especially in the elderly population. Pioglitazone, a PPAR-γ agonist associated with bone loss and risk of fracture in type 2 diabetes mellitus patients. In this study, ameliorative effect of berberine against pioglitazone-induced bone loss in diabetic rats and possible mechanisms has been explored. Diabetes was induced in male Wistar albino rats by streptozotocin (65 mg/kg, i.v.) after 15min of nicotinamide (230mg/kg, i.p.) administration...
August 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28810293/-comparative-study-of-three-different-decalcifying-solutions-in-bone-metastasis-specimens-with-breast-cancer
#10
H Y Wu, T Wang, K L Chen, Z W Fan, X H Pu, B Zhang, X S Fan, F Q Meng
Objective: To investigate the optimal strategy for immunohistochemical (IHC) staining in bone metastasis specimens from breast cancer. Methods: Twenty-eight bone metastases specimens from breast cancers were divided into three groups and subjected to different decalcifying agents (group A-10% nitrate, group B-EDTA decalcification, and group C-imported decalcifying solution RapidCal). The effects of those on HE and IHC staining for Ki-67, ER, PR, GATA3, RANK, RANKL, HER2 and HER2 FISH results were assessed. Results: There were no significant differences among three groups in HE morphology and IHC staining...
August 8, 2017: Zhonghua Bing Li Xue za Zhi Chinese Journal of Pathology
https://www.readbyqxmd.com/read/28808641/management-of-large-class-ii-lesions-in-molars-how-to-restore-and-when-to-perform-surgical-crown-lengthening
#11
Ana Belén Dablanca-Blanco, Juan Blanco-Carrión, Benjamín Martín-Biedma, Purificación Varela-Patiño, Alba Bello-Castro, Pablo Castelo-Baz
The restoration of endodontic tooth is always a challenge for the clinician, not only due to excessive loss of tooth structure but also invasion of the biological width due to large decayed lesions. In this paper, the 7 most common clinical scenarios in molars with class II lesions ever deeper were examined. This includes both the type of restoration (direct or indirect) and the management of the cavity margin, such as the need for deep margin elevation (DME) or crown lengthening. It is necessary to have the DME when the healthy tooth remnant is in the sulcus or at the epithelium level...
August 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28808593/combined-bone-transportation-and-lengthening-techniques-for-the-treatment-of-septic-nonunion-of-the-forearm-followed-by-tendon-transfer
#12
Konstantinos Ditsios, Eirini Iosifidou, Lazaros Kostretzis, Panagiotis Konstantinou, Iosafat Pinto, Ioannis Theodoroudis, Ippokratis Hatzokos
Infected nonunion of a forearm fracture complicated by a considerable skin-muscle defect poses a great challenge to orthopaedic surgeons. The treatment strategy comprises eradication of the infection, ensuring bony union and soft tissue coverage along with functional restoration. We report a case of a 23-year-old man with an open Gustilo-Anderson IIIb fracture complicated by infected nonunion after internal fixation. After thorough surgical debridement, a considerable soft tissue defect, extensor muscle loss, and posterior interosseous nerve laceration had to be addressed...
2017: Case Reports in Orthopedics
https://www.readbyqxmd.com/read/28808057/a-kidney-specific-genetic-control-module-in-mice-governs-endocrine-regulation-of-the-cytochrome-p450-gene-cyp27b1-essential-for-vitamin-d3-activation
#13
Mark B Meyer, Nancy A Benkusky, Martin Kaufmann, Seong Min Lee, Melda Onal, Glenville Jones, J Wesley Pike
The vitamin D endocrine system regulates mineral homeostasis through its activities in the intestine, kidney, and bone. Terminal activation of vitamin D3 to its hormonal form, 1,25(OH)2D3, occurs in the kidney via the cytochrome P450 enzyme CYP27B1. Despite its importance in vitamin D metabolism, the molecular mechanisms underlying the regulation of the gene for this enzyme, Cyp27b1, are unknown. Here, we identified a kidney-specific control module governed by a renal cell-specific chromatin structure located distal to Cyp27b1 that mediates unique basal and parathyroid hormone (PTH)-, fibroblast growth factor 23 (FGF23)-, and 1,25(OH)2D3-mediated regulation of Cyp27b1 expression...
August 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28808027/de-novo-mutations-in-inhibitors-of-wnt-bmp-and-ras-erk-signaling-pathways-in-non-syndromic-midline-craniosynostosis
#14
Andrew T Timberlake, Charuta G Furey, Jungmin Choi, Carol Nelson-Williams, Erin Loring, Amy Galm, Kristopher T Kahle, Derek M Steinbacher, Dawid Larysz, John A Persing, Richard P Lifton
Non-syndromic craniosynostosis (NSC) is a frequent congenital malformation in which one or more cranial sutures fuse prematurely. Mutations causing rare syndromic craniosynostoses in humans and engineered mouse models commonly increase signaling of the Wnt, bone morphogenetic protein (BMP), or Ras/ERK pathways, converging on shared nuclear targets that promote bone formation. In contrast, the genetics of NSC is largely unexplored. More than 95% of NSC is sporadic, suggesting a role for de novo mutations. Exome sequencing of 291 parent-offspring trios with midline NSC revealed 15 probands with heterozygous damaging de novo mutations in 12 negative regulators of Wnt, BMP, and Ras/ERK signaling (10...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28807865/novel-compound-heterozygous-mutations-identified-by-whole-exome-sequencing-in-a-japanese-patient-with-geroderma-osteodysplastica
#15
Ryojun Takeda, Masaki Takagi, Hiroyuki Shinohara, Hiroshi Futagawa, Satoshi Narumi, Tomonobu Hasegawa, Gen Nishimura, Hiroshi Yoshihashi
Geroderma osteodysplastica (GO) is a subtype of cutis laxa syndrome characterized by congenital wrinkly skin, a prematurely aged face, extremely short stature, and osteoporosis leading to recurrent fractures. GO exhibits an autosomal recessive inheritance pattern and is caused by loss-of-function mutations in GORAB, which encodes a protein important for Golgi-related transport. Using whole exome sequencing, we identified novel compound heterozygous nonsense mutations in the GORAB in a GO patient. The patient was a 14-year-old Japanese boy...
August 11, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/28807082/hearing-status-in-patients-with-rheumatoid-arthritis
#16
A Ahmadzadeh, M Daraei, M Jalessi, A A Peyvandi, E Amini, L A Ranjbar, A Daneshi
OBJECTIVE: Rheumatoid arthritis is thought to induce conductive hearing loss and/or sensorineural hearing loss. This study evaluated the function of the middle ear and cochlea, and the related factors. METHODS: Pure tone audiometry, speech reception thresholds, speech discrimination scores, tympanometry, acoustic reflexes, and distortion product otoacoustic emissions were assessed in rheumatoid arthritis patients and healthy volunteers. RESULTS: Pure tone audiometry results revealed a higher bone conduction threshold in the rheumatoid arthritis group, but there was no significant difference when evaluated according to the sensorineural hearing loss definition...
August 15, 2017: Journal of Laryngology and Otology
https://www.readbyqxmd.com/read/28807049/oral-manifestations-dental-management-and-a-rare-homozygous-mutation-of-the-prdm12-gene-in-a-boy-with-hereditary-sensory-and-autonomic-neuropathy-type-viii-a-case-report-and-review-of-the-literature
#17
Karim Elhennawy, Seif Reda, Christian Finke, Luitgard Graul-Neumann, Paul-Georg Jost-Brinkmann, Theodosia Bartzela
BACKGROUND: Hereditary sensory and autonomic neuropathy type VIII is a rare autosomal recessive inherited disorder. Chen et al. recently identified the causative gene and characterized biallelic mutations in the PR domain-containing protein 12 gene, which plays a role in the development of pain-sensing nerve cells. Our patient's family was included in Chen and colleagues' study. We performed a literature review of the PubMed library (January 1985 to December 2016) on hereditary sensory and autonomic neuropathy type I to VIII genetic disorders and their orofacial manifestations...
August 15, 2017: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/28806747/low-lamin-a-expression-in-lung-adenocarcinoma-cells-from-pleural-effusions-is-a-pejorative-factor-associated-with-high-number-of-metastatic-sites-and-poor-performance-status
#18
Elise Kaspi, Diane Frankel, Julien Guinde, Sophie Perrin, Sophie Laroumagne, Andrée Robaglia-Schlupp, Kevin Ostacolo, Karim Harhouri, Rachid Tazi-Mezalek, Joelle Micallef, Hervé Dutau, Pascale Tomasini, Annachiara De Sandre-Giovannoli, Nicolas Lévy, Pierre Cau, Philippe Astoul, Patrice Roll
The type V intermediate filament lamins are the principal components of the nuclear matrix, including the nuclear lamina. Lamins are divided into A-type and B-type, which are encoded by three genes, LMNA, LMNB1, and LMNB2. The alternative splicing of LMNA produces two major A-type lamins, lamin A and lamin C. Previous studies have suggested that lamins are involved in cancer development and progression. A-type lamins have been proposed as biomarkers for cancer diagnosis, prognosis, and/or follow-up. The aim of the present study was to investigate lamins in cancer cells from metastatic pleural effusions using immunofluorescence, western blotting, and flow cytometry...
2017: PloS One
https://www.readbyqxmd.com/read/28806499/hibernating-little-pocket-mice-show-few-seasonal-changes-in-bone-properties
#19
Noellyn Pineda, Marjorie Owen, Claire Tucker, Sam Wojda, Stanley Kitchen, Hal Black, Seth Donahue
Periods of disuse or physical inactivity increase bone porosity and decrease bone mineral density, resulting in a loss of bone mechanical competence in many animals. Although large hibernators like bears and marmots prevent bone loss during hibernation, despite long periods of physical inactivity, some small hibernators do lose bone during hibernation. Little pocket mice (Perognathus longimembris) remain underground during winter hibernation and undergo bouts of torpor and interbout arousals, but the torpor bout duration is shorter than other rodent hibernators...
August 14, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/28806378/gummy-smile-correction-using-lingual-orthodontics-and-augmented-corticotomy-in-extremely-thin-alveolar-housing
#20
Kyung-Yen Nahm, Seung-Yun Shin, Hyo-Won Ahn, Seong-Hun Kim, Gerald Nelson
BACKGROUND: Tooth movement out of anatomic limitations was assisted by augmented corticotomy using deproteinized bovine bone mineral. METHODS: Lip protrusion can be reduced by premolar extraction followed by retraction of the anterior teeth. Surgical intervention is appropriate when the alveolar bone housing of the anterior region is insufficient for the tooth movement. In this patient, corticotomy in upper palatal area and anterior segmented osteotomy in the mandible were performed...
August 10, 2017: Journal of Craniofacial Surgery
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