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https://www.readbyqxmd.com/read/28102011/local-myogenic-pulp-derived-cell-injection-enhances-craniofacial-muscle-regeneration-in-vivo
#1
J E Jung, M J Song, S Shin, Y J Choi, K H Kim, C J Chung
OBJECTIVES: To enhance myogenic differentiation in pulp cells isolated from extracted premolars by epigenetic modification using a DNA demethylation agent, 5-aza-2'-deoxycytidine (5-Aza), and to evaluate the potent stimulatory effect of 5-Aza-treated pulp cell injection for craniofacial muscle regeneration in vivo. SETTING AND SAMPLE POPULATION: Pulp cells were isolated from premolars extracted for orthodontic purposes from four adults (age range, 18-22.1 years)...
February 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28095141/an-old-problem-aging-and-skeletal-muscle-strain-injury
#2
Brent A Baker
: Clinical Scenario: Even though chronological aging is an inevitable phenomenological consequence occurring in every living organism, it is biological aging that may be the most significant factor challenging our quality of life. Development of functional limitations, resulting from improper maintenance and restoration of various organ systems, ultimately leads to reduced health and independence. Skeletal muscle is an organ system, that when challenged, is often injured in response to varying stimuli...
January 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28088934/clinical-diagnosis-and-treatment-of-intraorbital-wooden-foreign-bodies
#3
Jia Li, Li-Ping Zhou, Jing Jin, Hong-Feng Yuan
PURPOSE: The intraorbital wooden foreign body is often misdiagnosed or missed on computed tomog- raphy (CT) scan, due to the invisible or unclear images. The residual foreign bodies often occur during surgical removal. The clinical manifestations, imaging features and treatment of intraorbital wooden foreign bodies were discussed in this study. METHOD: We retrospectively analyzed 14 cases of intraorbital wooden foreign bodies managed at our hospital between January 2007 and May 2015...
December 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28076015/us-and-mr-imaging-of-pectoralis-major-injuries
#4
Yauk K Lee, Matt R Skalski, Eric A White, Anderanik Tomasian, Diane D Phan, Dakshesh B Patel, George R Matcuk, Aaron J Schein
During the past 2 decades, the frequency of pectoralis major muscle injuries has increased in association with the increased popularity of bench press exercises. Injury of the pectoralis major can occur at the muscle origin, muscle belly, musculotendinous junction, intratendinous region, and/or humeral insertion-with or without bone avulsion. The extent of the tendon injury ranges from partial to complete tears. Treatment may be surgical or conservative, depending on the clinical scenario and anatomic characteristics of the injury...
January 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28056487/non-invasive-assessment-of-muscle-injury-in-healthy-and-dystrophic-animals-with-electrical-impedance-myography
#5
Benjamin Sanchez, Shama R Iyer, Jia Li, Kush Kapur, Su Xu, Seward Rutkove, Richard M Lovering
INTRODUCTION: Dystrophic muscle is particularly susceptible to eccentric contraction-induced injury. We tested the hypothesis that electrical impedance myography (EIM) can detect injury induced by maximal-force lengthening contractions. METHODS: We induced injury in the quadriceps of wild type (WT) and dystrophic (mdx) mice with eccentric contractions using an established model. RESULTS: mdx quadriceps had significantly larger losses in peak twitch and tetany compared to losses in WT quadriceps...
January 5, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28031188/mri-appearance-does-not-change-in-the-first-7-days-after-acute-hamstring-injury-a-prospective-study
#6
Arnlaug Wangensteen, Roald Bahr, Robbart Van Linschoten, Emad Almusa, Rodney Whiteley, Erik Witvrouw, Johannes L Tol
BACKGROUND: The optimal timing of MRI following acute hamstring injury is not known and is mainly based on expert opinions. AIMS: To describe the day-to-day changes in the extent of oedema and investigate the optimal timing for detection of fibre disruption on MRI following acute hamstring injuries. STUDY DESIGN: Prospective, descriptive study. METHODS: We performed standardised MRI (1.5T) ≤1 day after injury in male athletes with acute hamstring injury...
December 28, 2016: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28030490/modeling-acinetobacter-baumannii-wound-infections-the-critical-role-of-iron
#7
Irma D Fleming, Monika A Krezalek, Natalia Belogortseva, Alexander Zaborin, Jennifer Defazio, Laxmipradha Chandrasekar, Luis A Actis, Olga Zaborina, John C Alverdy
BACKGROUND: Acinetobacter baumannii has emerged as an increasingly important and successful opportunistic human pathogen due to its ability to withstand harsh environmental conditions, its characteristic virulence factors and quick adaptability to stress. METHODS: We developed a clinically relevant murine model of A. baumannii traumatic wound infection to determine the effect of local wound environment on A. baumannii virulence. Mice underwent rectus muscle crush injury combined with ischemia created by epigastric vessel ligation, followed by A...
December 23, 2016: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28027607/third-or-fourth-degree-intrapartum-anal-sphincter-tears-are-associated-with-levator-ani-avulsion-in-primiparas
#8
Dan V Valsky, Sarah M Cohen, Michal Lipschuetz, Drorith Hochner-Celnikier, Hagit Daum, Itai Yagel, Simcha Yagel
OBJECTIVES: We evaluated primiparous women with clinically diagnosed third- and fourth-degree and anal sphincter tears, to evaluate the rate of levator ani muscle injury compared to primiparous women without sphincter tears. METHODS: Primiparous women delivering in our maternity ward with intrapartum diagnoses of third- or fourth-degree anal sphincter tears, repaired by the overlapping technique, were recruited to undergo 3-dimensional transperineal sonography of the pelvic floor anatomy, including the anterior and posterior compartments...
April 2016: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28026739/-avulsion-of-the-proximal-hamstring-insertion-case-reports
#9
R Mizera, R Harcuba, J Kratochvíl
Proximal hamstring avulsion is an uncommon muscle injury with a lack of consensus on indications and the timing and technique of surgery. Poor clinical symptoms and difficulties in the diagnostic process can lead to a false diagnosis. The authors present three cases of proximal hamstring avulsion, two complete and one partial ruptures of the biceps femoris muscle. MRI and ultrasound scans were used for optimal treatment alignment. Acute surgery reconstruction (< 4 weeks) was done in two patients. Re-attachment of the full thickness ruptures was performed to the original place and secured by suture anchors, the partial rupture was fixed by a simple suture...
2016: Acta Chirurgiae Orthopaedicae et Traumatologiae Cechoslovaca
https://www.readbyqxmd.com/read/28005935/a-biomechanical-stability-study-of-extraforaminal-lumbar-interbody-fusion-on-the-cadaveric-lumbar-spine-specimens
#10
Song Guo, Cheng Zeng, Meijun Yan, Yingchao Han, Dongdong Xia, Guixin Sun, Lijun Li, Mingjie Yang, Jun Tan
BACKGROUND: Transforaminal lumbar interbody fusion (TLIF) is an effective surgery for lumbar degenerative disease. However, this fusion technique requires resection of inferior facet joint to provide access for superior facet joint resection, which results in reduced lumbar spinal stability and unnecessary trauma. We have previously developed extraforaminal lumbar interbody fusion (ELIF) that can avoid back muscle injury with direct nerve root decompression. This study aims to show that ELIF enhances lumbar spinal stability in comparison to TLIF by comparing lumbar spinal stability of L4-L5 range of motion (ROM) on 12 cadaveric spine specimens after performing TLIF or ELIF...
2016: PloS One
https://www.readbyqxmd.com/read/27993387/low-vitamin-d-does-not-predict-statin-associated-muscle-symptoms-but-is-associated-with-transient-increases-in-muscle-damage-and-pain
#11
Beth A Taylor, Lindsay Lorson, C Michael White, Paul D Thompson
BACKGROUND AND AIMS: Low vitamin D (VITD) may contribute to statin-associated muscle symptoms (SAMS). We examined the influence of baseline and change in VITD in patients with verified SAMS. METHODS: SAMS was verified in 120 patients with prior statin muscle complaints using 8-week randomized, double-blind crossover trials of simvastatin (SIMVA) 20 mg/d and placebo. 25 (OH)vitamin D was measured at each phase of the trial. RESULTS: Forty-three patients (35...
November 12, 2016: Atherosclerosis
https://www.readbyqxmd.com/read/27992284/regeneration-of-skeletal-muscle-following-eccentric-injury
#12
Jeffrey J Dueweke, Tariq M Awan, Christopher L Mendias
Eccentric contraction-induced skeletal muscle injuries, can be included in what is clinically referred to as muscle strains, are among the most common injuries treated in the sports medicine setting. Although patients with mild injuries often fully recover to their pre-injury levels, patients who suffer moderate or severe injuries can have a persistent weakness and loss of function that is refractory to rehabilitation exercises and currently available therapeutic interventions. The objectives of this review are to describe the fundamental biophysics of force transmission in muscle and the mechanism of muscle strain injuries, as well as the cellular and molecular processes that underlie the repair and regeneration of injured muscle tissue...
December 19, 2016: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/27991570/establishment-of-a-highly-sensitive-sandwich-elisa-for-the-n-terminal-fragment-of-titin-in-urine
#13
Nobuhiro Maruyama, Tsuyoshi Asai, Chiaki Abe, Akari Inada, Takeshi Kawauchi, Kazuya Miyashita, Masahiro Maeda, Masafumi Matsuo, Yo-Ichi Nabeshima
Muscle damage and loss of muscle mass are triggered by immobilization, loss of appetite, dystrophies and chronic wasting diseases. In addition, physical exercise causes muscle damage. In damaged muscle, the N-terminal and C-terminal regions of titin, a giant sarcomere protein, are cleaved by calpain-3, and the resulting fragments are excreted into the urine via glomerular filtration. Therefore, we considered titin fragments as promising candidates for reliable and non-invasive biomarkers of muscle injury. Here, we established a sandwich ELISA that can measure the titin N-terminal fragment over a biologically relevant range of concentrations, including those in urine samples from older, non-ambulatory Duchenne muscular dystrophy patients and from healthy donors under everyday life conditions and after exercise...
December 19, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27984723/in%C3%A2-vivo-amelioration-of-age-associated-hallmarks-by-partial-reprogramming
#14
Alejandro Ocampo, Pradeep Reddy, Paloma Martinez-Redondo, Aida Platero-Luengo, Fumiyuki Hatanaka, Tomoaki Hishida, Mo Li, David Lam, Masakazu Kurita, Ergin Beyret, Toshikazu Araoka, Eric Vazquez-Ferrer, David Donoso, Jose Luis Roman, Jinna Xu, Concepcion Rodriguez Esteban, Gabriel Nuñez, Estrella Nuñez Delicado, Josep M Campistol, Isabel Guillen, Pedro Guillen, Juan Carlos Izpisua Belmonte
Aging is the major risk factor for many human diseases. In vitro studies have demonstrated that cellular reprogramming to pluripotency reverses cellular age, but alteration of the aging process through reprogramming has not been directly demonstrated in vivo. Here, we report that partial reprogramming by short-term cyclic expression of Oct4, Sox2, Klf4, and c-Myc (OSKM) ameliorates cellular and physiological hallmarks of aging and prolongs lifespan in a mouse model of premature aging. Similarly, expression of OSKM in vivo improves recovery from metabolic disease and muscle injury in older wild-type mice...
December 15, 2016: Cell
https://www.readbyqxmd.com/read/27984691/-iliacus-muscle-injury-caused-by-inadequate-exercise
#15
J Magaña-Reyes, L G Domínguez-Gasca, A García-Luna, L G Domínguez-Carrillo
BACKGROUND: Traumatic iliacus muscle injury is rare; it is usually caused by trauma or intense exercise involving the pelvic girdle; it can produce a hematoma with femoral nerve neuropathy. Spontaneous muscle hematomas occur in patients with coagulation disorders. CLINICAL CASE: A 45-year-old male with 18 days of evolution, with an intense pain in the right buttock, groin and iliac fossa, with an inability for hip flexion and ambulation caused by inadequate exercise (supine double leg lifts)...
May 2016: Acta Ortopédica Mexicana
https://www.readbyqxmd.com/read/27967605/early-developmental-disruption-of-type-2-deiodinase-pathway-in-mouse-skeletal-muscle-does-not-impair-muscle-function
#16
Danielle Leao Ignacio, Diego Henrique Silvestre, Elena Palmer, Barbara Bocco, Tatiana Fonseca, Balazs Gereben, Miriam Ribeiro, Antonio Carlos Bianco, Joao Pedro Werneck de Castro
BACKGROUND: Myogenesis is positively regulated by thyroid hormone (T3), which is amplified by the type 2 deiodinase (D2) activation of T4-to-T3. Global inactivation of Dio2 gene impairs skel-etal muscle (SKM) differentiation and regeneration in response to muscle injury. Given that new-born and adult mice with late developmental SKM Dio2 disruption do not develop a significant phenotype, we hypothesized that D2 plays an early role in this process. METHODS: This was tested in mice with SKM disruption of Dio2 driven by two early develop-mental promoters, i...
December 14, 2016: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/27943289/roles-of-notch1-signaling-in-regulating-satellite-cell-fates-choices-and-postnatal-skeletal-myogenesis
#17
REVIEW
Tizhong Shan, Ziye Xu, Weiche Wu, Jiaqi Liu, Yizhen Wang
Adult skeletal muscle stem cells, also called satellite cells, are indispensable for the growth, maintenance, and regeneration of the postnatal skeletal muscle. Satellite cells, predominantly quiescent in mature resting muscles, are activated after skeletal muscle injury or degeneration. Notch1 signaling is an evolutionarily conserved pathway that plays crucial roles in satellite cells homeostasis and postnatal skeletal myogenesis and regeneration. Activation of Notch1 signaling promotes the muscle satellite cells quiescence and proliferation, but inhibits differentiation of muscle satellite cells...
December 12, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27942591/mtor-inhibition-and-bmp-signaling-act-synergistically-to-reduce-muscle-fibrosis-and-improve-myofiber-regeneration
#18
Shailesh Agarwal, David Cholok, Shawn Loder, John Li, Christopher Breuler, Michael T Chung, Hsiao Hsin Sung, Kavitha Ranganathan, Joe Habbouche, James Drake, Joshua Peterson, Caitlin Priest, Shuli Li, Yuji Mishina, Benjamin Levi
Muscle trauma is highly morbid due to intramuscular scarring, or fibrosis, and muscle atrophy. Studies have shown that bone morphogenetic proteins (BMPs) reduce muscle atrophy. However, increased BMP signaling at muscle injury sites causes heterotopic ossification, as seen in patients with fibrodysplasia ossificans progressiva (FOP), or patients with surgically placed BMP implants for bone healing. We use a genetic mouse model of hyperactive BMP signaling to show the development of intramuscular fibrosis surrounding areas of ectopic bone following muscle injury...
December 8, 2016: JCI Insight
https://www.readbyqxmd.com/read/27941488/no-differences-between-alter-g-trainer-and-active-and-passive-recovery-strategies-on-isokinetic-strength-systemic-oxidative-stress-and-perceived-muscle-soreness-after-exercise-induced-muscle-damage
#19
Matthew B Cooke, Carrie Nix, Lori Greenwood, Mike Greenwood
The incidence of muscle injuries is prevalent in elite sport athletes as well as weekend warriors and strategies that safely and effectively hasten recovery are highly desirable. The purpose of this study was to examine the differences between three recovery methods after eliciting muscle damage in recreationally active men relative to maximal isokinetic contractions, perceived muscle soreness and psychological mood states. Twenty-five recreationally active men (22.15±3.53yrs, 75.75±11.91kg, 180.52±7.3cm) were randomly matched by VO2 peak (53...
November 28, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27939528/peroxisome-proliferator-activated-receptor-beta-ppar%C3%AE-activity-increases-the-immune-response-and-shortens-the-early-phases-of-skeletal-muscle-regeneration
#20
Isabelle Mothe-Satney, Jessica Piquet, Joseph Murdaca, Brigitte Sibille, Paul A Grimaldi, Jaap G Neels, Anne-Sophie Rousseau
Peroxisome Proliferator-Activated Receptor Beta (PPARβ) is a transcription factor playing an important role in both muscle myogenesis and remodeling, and in inflammation. However, its role in the coordination of the transient muscle inflammation and reparation process following muscle injury has not yet been fully determined. We postulated that activation of the PPARβ pathway alters the early phase of the muscle regeneration process, i.e. when immune cells infiltrate in injured muscle. Tibialis anteriors of C57BL6/J mice treated or not with the PPARβ agonist GW0742 were injected with cardiotoxin (or with physiological serum for the contralateral muscle)...
December 7, 2016: Biochimie
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