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https://www.readbyqxmd.com/read/28636054/guidelines-for-surgical-approaches-for-minimally-invasive-plate-osteosynthesis-in-cats
#1
Philipp A Schmierer, Antonio Pozzi
OBJECTIVES: Minimally invasive plate osteosynthesis (MIPO) is one of the most recent fixation techniques that embody the concept of biological osteosynthesis. Several studies evaluating MIPO in dogs have been published in the recent years. However, there are few clinical reports of MIPO in cats and no description of the surgical approaches. The purpose of our study was to describe the safe corridors for plate insertion in cats using the MIPO technique. METHODS: The surgical approaches for the humerus, radius-ulna, femur and tibia were developed after reviewing the described techniques and surgical approaches for MIPO in dogs, while considering any relevant anatomical difference between dogs and cats...
June 21, 2017: Veterinary and Comparative Orthopaedics and Traumatology: V.C.O.T
https://www.readbyqxmd.com/read/28635959/optogenetic-activation-of-plexin-b1-reveals-contact-repulsion-between-osteoclasts-and-osteoblasts
#2
Abhijit Deb Roy, Taofei Yin, Shilpa Choudhary, Vladimir Rodionov, Carol C Pilbeam, Yi I Wu
During bone remodelling, osteoclasts induce chemotaxis of osteoblasts and yet maintain spatial segregation. We show that osteoclasts express the repulsive guidance factor Semaphorin 4D and induce contact inhibition of locomotion (CIL) in osteoblasts through its receptor Plexin-B1. To examine causality and elucidate how localized Plexin-B1 stimulation may spatiotemporally coordinate its downstream targets in guiding cell migration, we develop an optogenetic tool for Plexin-B1 designated optoPlexin. Precise optoPlexin activation at the leading edge of migrating osteoblasts readily induces local retraction and, unexpectedly, distal protrusions to steer cells away...
June 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/28634334/image-guided-transplantation-of-single-cells-in-the-bone-marrow-of-live-animals
#3
Raphaël Turcotte, Clemens Alt, Judith M Runnels, Kyoko Ito, Juwell W Wu, Walid Zaher, Luke J Mortensen, Lev Silberstein, Daniel C Côté, Andrew L Kung, Keisuke Ito, Charles P Lin
Transplantation of a single hematopoietic stem cell is an important method for its functional characterization, but the standard transplantation protocol relies on cell homing to the bone marrow after intravenous injection. Here, we present a method to transplant single cells directly into the bone marrow of live mice. We developed an optical platform that integrates a multiphoton microscope with a laser ablation unit for microsurgery and an optical tweezer for cell micromanipulation. These tools allow image-guided single cell transplantation with high spatial control...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28634182/sf3b1-initiating-mutations-in-mds-with-ring-sideroblasts-target-lymphomyeloid-hematopoietic-stem-cells
#4
Teresa Mortera-Blanco, Marios Dimitriou, Petter S Woll, Mohsen Karimi, Edda Elvarsdottir, Simona Conte, Magnus Tobiasson, Monika Jansson, Iyadh Douagi, Matahi Moarii, Leonie Saft, Elli Papaemmanuil, Sten Eirik W Jacobsen, Eva Hellström-Lindberg
Mutations in the RNA splicing gene SF3B1 are found in more than 80% of patients with myelodysplastic syndrome with ring sideroblasts (MDS-RS). We investigated the origin of SF3B1 mutations within the bone marrow hematopoietic stem and progenitor cell compartments in patients with MDS-RS. Screening for recurrently mutated genes in the mononuclear cell fraction revealed mutations in SF3B1 in 39 of 40 cases (97.5%), combined with TET2 and DNMT3A in 11 (28%) and 6 (15%) patients, respectively. All recurrent mutations identified in mononuclear cells could be tracked back to the phenotypically defined hematopoietic stem cell (HSC) compartment in all investigated patients, and were also present in downstream myeloid and erythroid progenitor cells...
June 20, 2017: Blood
https://www.readbyqxmd.com/read/28634117/to-assess-the-effects-of-parathyroidectomy-tptx-versus-tptx-at-for-secondary-hyperparathyroidism-in-chronic-renal-failure-a-meta-analysis
#5
REVIEW
Nian-Cun Qiu, Si-Luo Zha, Miao-E Liu, Zhi-Peng Du, Yi-Fan Wang, Qiang Wang, Qi Chen, Ying Jiang, Cheng-Xiang Shan, Ming Qiu
BACKGROUND: Secondary Hyperparathyroidism (SHPT) requiring parathyroidectomy (PTX) occurs more commonly in patients with progressive chronic kidney disease and in those on long-term lithium therapy. Successful PTX often results in a dramatic drop of parathyroid hormone level, relieves the patient from clinical symptoms, and reduces mortality. However, there is an ongoing debate on the optimal surgical treatment of SHPT. Currently, no clinical guidelines or trials have definitely answered the question of whether Total Parathyroidectomy (TPTX) is superior or equal to Total Parathyroidectomy with Autotransplantation (TPTX + AT)...
June 17, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28634075/mint3-in-bone-marrow-derived-cells-promotes-lung-metastasis-in-breast-cancer-model-mice
#6
Toshiro Hara, Yoshinori Murakami, Motoharu Seiki, Takeharu Sakamoto
Breast cancer is one of the most common cancers in women in the world. Although breast cancer is well treatable at the early stage, patients with distant metastases show a poor prognosis. Data from recent studies using transplantation models indicate that Mint3/APBA3 might promote breast cancer malignancy. However, whether Mint3 indeed contributes to tumor development, progression, or metastasis in vivo remains unclear. To address this, here we examined whether Mint3 depletion affects tumor malignancy in MMTV-PyMT breast cancer model mice...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28633925/the-discovery-of-plasma-cells-an-historical-note
#7
REVIEW
Domenico Ribatti
The name plasma cell was introduced by the anatomist Heinrich H. von Hartz-Waldeyer in 1875. Plasma cells derive from small B lymphocytes after their activation. A fully mature plasma cell lacks surface immunoglobulin expression. Its form is round or oval, with characteristic basophilic cytoplasm and an eccentric nucleus that contains coarse heterochromatin. Antigen activation of mature B cells leads initially to germinal center development, the transient generation of plasmablasts that secrete antibody while still dividing, and short-lived extrafollicular plasma cells that secrete antigen-specific germ line-encoded antibodies...
June 17, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28633676/evaluation-of-p16-expression-in-canine-appendicular-osteosarcoma
#8
B G Murphy, M Y Mok, D York, R Rebhun, K D Woolard, C Hillman, P Dickinson, K Skorupski
BACKGROUND: Osteosarcoma (OSA) is a common malignant bone tumor of large breed dogs that occurs at predictable anatomic sites. At the time of initial diagnosis, most affected dogs have occult pulmonary metastases. Even with aggressive surgical treatment combined with chemotherapy, the majority of dogs diagnosed with OSA live less than 1 year from the time of diagnosis. The ability to identify canine OSA cases most responsive to treatment is needed. In humans, OSA is also an aggressive tumor that is histologically and molecularly similar to canine OSA...
June 20, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/28633552/cabozantinib-for-the-treatment-of-kidney-cancer
#9
Ahmed Abdelaziz, Ulka Vaishampayan
Cabozantinib is a small molecule tyrosine kinase inhibitor that initially showed activity in medullary thyroid cancer and was recently approved by the Food and Drug Administration for the treatment of metastatic renal cell carcinoma after progression on first line therapy. Areas Covered: In the METEOR trial, cabozantinib demonstrated significantly improved efficacy in all three endpoints; response rates, progression free survival and overall survival in a randomized trial with everolimus as an active comparator...
June 21, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28633121/biomaterials-based-strategies-for-rotator-cuff-repair
#10
REVIEW
Song Zhao, Wei Su, Vishva Shah, Divia Hobson, Lara Yildirimer, Kelvin W K Yeung, Jinzhong Zhao, Wenguo Cui, Xin Zhao
Tearing of the rotator cuff commonly occurs as among one of the most frequently experienced tendon disorders. While treatment typically involves surgical repair, failure rates to achieve or sustain healing range from 20 to 90%. The insufficient capacity to recover damaged tendon to heal to the bone, especially at the enthesis, is primarily responsible for the failure rates reported. Various types of biomaterials with special structures have been developed to improve tendon-bone healing and tendon regeneration, and have received considerable attention for replacement, reconstruction, or reinforcement of tendon defects...
June 6, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28633074/programming-cells-for-cardiac-repair
#11
REVIEW
Rocco Romagnuolo, Michael A Laflamme
Because the heart is a poorly regenerative organ, there has been considerable interest in developing novel cell-based approaches to restore lost contractile function after myocardial infarction (MI). While a wide variety of candidate cell types have been tested in animal MI models, the vast majority of clinical trials have used adult stem cell types, usually derived from bone marrow. These studies have generally yielded disappointing results, an outcome that may reflect in part the limited cardiogenic potential of the adult stem cell sources employed...
June 17, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28632753/mait-cells-launch-a-rapid-robust-and-distinct-hyperinflammatory-response-to-bacterial-superantigens-and-quickly-acquire-an-anergic-phenotype-that-impedes-their-cognate-antimicrobial-function-defining-a-novel-mechanism-of-superantigen-induced-immunopathology
#12
Christopher R Shaler, Joshua Choi, Patrick T Rudak, Arash Memarnejadian, Peter A Szabo, Mauro E Tun-Abraham, Jamie Rossjohn, Alexandra J Corbett, James McCluskey, John K McCormick, Olivier Lantz, Roberto Hernandez-Alejandro, S M Mansour Haeryfar
Superantigens (SAgs) are potent exotoxins secreted by Staphylococcus aureus and Streptococcus pyogenes. They target a large fraction of T cell pools to set in motion a "cytokine storm" with severe and sometimes life-threatening consequences typically encountered in toxic shock syndrome (TSS). Given the rapidity with which TSS develops, designing timely and truly targeted therapies for this syndrome requires identification of key mediators of the cytokine storm's initial wave. Equally important, early host responses to SAgs can be accompanied or followed by a state of immunosuppression, which in turn jeopardizes the host's ability to combat and clear infections...
June 2017: PLoS Biology
https://www.readbyqxmd.com/read/28632727/post-translational-regulation-contributes-to-the-loss-of-lkb1-expression-through-sirt1-deacetylase-in-osteosarcomas
#13
Nadège Presneau, Laure Alice Duhamel, Hongtao Ye, Roberto Tirabosco, Adrienne M Flanagan, Malihe Eskandarpour
BACKGROUND: The most prevalent form of bone cancer is osteosarcoma (OS), which is associated with poor prognosis in case of metastases formation. Mice harbouring liver kinase B1 (LKB1(+/-)) develop osteoblastoma-like tumours. Therefore, we asked whether loss of LKB1 gene has a role in the pathogenesis of human OS. METHODS: Osteosarcomas (n=259) were screened for LKB1 and sirtuin 1 (SIRT1) protein expression using immunohistochemistry and western blot. Those cases were also screened for LKB1 genetic alterations by next-generation sequencing, Sanger sequencing, restriction fragment length polymorphism and fluorescence in situ hybridisation approaches...
June 20, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28632666/change-in-calcaneal-bone-strength-in-long-term-care-residents-treated-with-low-intensity-pulsed-ultrasound
#14
Hiroyasu Okuizumi, Kiyoshi Koyano, Kazuya Kurosawa, Naoto Kamide, Ayako Soyano
OBJECTIVE: We examined the effect of low-intensity pulsed ultrasound (LIPUS) on bone strength in osteoporotic elderly residents. MATERIALS AND METHODS: This was a randomized controlled trial. Elderly residents with osteoporosis in a long-term care facility were treated with LIPUS (oscillation frequency 100 KHz) that involved treatment of the heel bone for 2 minutes a day. The selection of the treated heel was decided randomly with a personal computer. The heel bone mineral density before and after treatment was measured by calcaneal quantitative ultrasound (GE-1000 Express)...
July 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28632554/the-correlation-between-cage-subsidence-bone-mineral-density-and-clinical-results-in-posterior-lumbar-interbody-fusion
#15
Kyu Won Oh, Jae Hyup Lee, Ji-Ho Lee, Do-Yoon Lee, Hee Jong Shim
STUDY DESIGN: A retrospective review of prospectively collected radiographic and clinical data. OBJECTIVE: This study aims to investigate the relationship between cage subsidence and bone mineral density (BMD), and to reveal the clinical implications of cage subsidence. SUMMARY OF BACKGROUND DATA: Posterior lumbar interbody fusion (PLIF) has become one of the standard treatment modality for lumbar degenerative disease. However, cage subsidence might result in recurrent foraminal stenosis and deteriorate the clinical results...
July 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28631687/-acquired-atresia-and-stenosis-of-the-external-acoustic-meatus
#16
D S Kondratchikov, Kh M Diab, V S Korvyakov, L I Terekhina
Acquired atresia of the external acoustic meatus is a rare pathological condition characterized by obliteration of the medial part of the external acoustic canal by a soft fibrous plug. The present article presents an overview of a series of cases of acquired atresia and stenosis of the external acoustic meatus with the description of etiology, pathogenesis, and methods for the treatment of this condition. In the majority of the cases, atresia develops at the final stage of granulation external otitis with or without an accompanying dermatological pathology...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28631671/-the-anatomical-features-of-the-middle-ear-exerting-the-influence-on-the-formation-of-exudative-otitis-media-in-the-breast-fed-infants-of-different-gestational-age
#17
A G Matroskin, I V Rakhmanova, A A Dreval', A N Kislyakov, A I Vladimirov
The objective of the present study was to elucidate the anatomical features of the structure of the middle ear and eustachian tube in the breast-fed infants of different gestational age that may be responsible for the formation of exudates (fluids). We have examined 150 temporal bones obtained from the children's cadavers that were allocated to three groups as follows: 50 temporal bones obtained at weeks 26-30 weeks of gestation (group 1), 44 bones 31-36 weeks of gestation (group 2), and 37-40 weeks of gestation (full-term babies, group 3),The analysis of the data obtained on an individual bases revealed either increase or decreases in the selected characteristics of the eustachian tube in comparison with the respective average values as well as the well apparent predominance of a single change or a combination of alteration of several parameters in one case in 26-30 weeks and 31-36 weeks groups...
2017: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/28631570/the-effect-of-rcan1-on-the-biological-behaviors-of-small-cell-lung-cancer
#18
Ningqiang Ma, Weiwei Shen, Hailin Pang, Ning Zhang, Hong Shi, Jianlin Wang, Helong Zhang
Bone is the third most common site of cancer metastasis. In total, 30%-40% of lung cancer cases can develop skeletal metastasis for which no effective therapy in clinic is available. RCAN1 (regulator of calcineurin 1) is an important regulator in angiogenesis which is vital to tumor growth. In this study, we investigated the changes of biological behaviors in SBC-5 and SBC-3 cells after the RCAN1 expression level was changed. Briefly, overexpression of RCAN1 significantly attenuated their malignancy, including decreased ability of proliferation, colony formation, migration, invasion, and bone adherence...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28631500/pancreatic-%C3%AE-cell-survival-and-proliferation-are-promoted-by-protein-kinase-g-type-i%C3%AE-and-downstream-regulation-of-akt-foxo1
#19
Janica C Wong, Van Vo, Priyatham Gorjala, Ronald R Fiscus
Early studies showed nitric oxide as a pro-inflammatory-cytokine-induced toxin involved in pancreatic β-cell destruction during pathogenesis of type-1 diabetes. However, nitric oxide has both cytotoxic and cytoprotective effects on mammalian cells, depending on concentration and micro-environmental surroundings. Our studies have shown that low/physiological-level nitric oxide selectively activates protein kinase G type Iα isoform, promoting cytoprotective/pro-cell-survival effects in many cell types. In bone marrow-derived stromal/mesenchymal stem cells, protein kinase G type Iα mediates autocrine effects of nitric oxide and atrial natriuretic peptide, promoting DNA-synthesis/proliferation and cell survival...
June 1, 2017: Diabetes & Vascular Disease Research
https://www.readbyqxmd.com/read/28631378/runx2-i-is-an-early-regulator-of-epithelial-mesenchymal-cell-transition-in-the-chick-embryo
#20
Andre L P Tavares, Jessie A Brown, Emily C Ulrich, Katerina Dvorak, Raymond B Runyan
BACKGROUND: Though normally linked to bone and cartilage development, the Runt-related transcription factor, RUNX2, was reported in the mouse heart during development of the valves. We examined RUNX2 expression and function in the developing avian heart as it related to the epithelial-mesenchymal transition (EMT) in the atrioventricular canal. EMT can be separated into an activation stage involving hypertrophy and cell separation and an invasion stage where cells invade the extracellular matrix...
June 19, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
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