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metabolic responses in trauma

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https://www.readbyqxmd.com/read/28625441/the-protective-effects-of-dexmedetomidine-on-ischemic-brain-injury-a-meta-analysis
#1
REVIEW
Lianxiang Jiang, Meizhu Hu, Yan Lu, Ya Cao, Yan Chang, Zeping Dai
BACKGROUND: Intracranial lesions, trauma or surgery-related damage activate immune inflammation and neuroendocrine responses, causing ischemic brain injury. Studies have shown that inflammatory cascade mediated by neuroendocrine hormones and proinflammatory mediators is implicated in the pathophysiology of ischemic brain injury. Alpha2-adrenoceptor agonists, dexmedetomidine, is widely used as neuroprotectants in anesthesia practice. However, it is still lack of a comprehensive meta-analysis to evaluate the neuroprotection of dexmedetomidine against ischemic brain injury via suppressing these two physiological responses...
August 2017: Journal of Clinical Anesthesia
https://www.readbyqxmd.com/read/28614388/osteoblast-specific-overexpression-of-complement-receptor-c5ar1-impairs-fracture-healing
#2
Stephanie Bergdolt, Anna Kovtun, Yvonne Hägele, Astrid Liedert, Thorsten Schinke, Michael Amling, Markus Huber-Lang, Anita Ignatius
The anaphylatoxin receptor C5aR1 plays an important role not only in innate immune responses, but also in bone metabolism and fracture healing, being highly expressed on immune and bone cells, including osteoblasts and osteoclasts. C5aR1 induces osteoblast migration, cytokine generation and osteoclastogenesis, however, the exact role of C5aR1-mediated signaling in osteoblasts is not entirely known. Therefore, we hypothesized that osteoblasts are essential target cells for C5a and that fracture healing should be disturbed in mice with an osteoblast-specific C5aR1 overexpression (Col1a1-C5aR1)...
2017: PloS One
https://www.readbyqxmd.com/read/28602695/-presumed-cardiac-arrest-in-children-and-young-adults-a-misnomer
#3
Katherine S Allan, Laurie J Morrison, Arnold Pinter, Jack V Tu, Paul Dorian
AIM: To use a novel methodology to assess the incidence and specific causes of Out-of-Hospital Cardiac Arrest (OHCA) within a young urban cohort. METHODS: All EMS attended OHCA patients in a large urban area, between 2009 and 2012, aged 2-45 years, treated or untreated, who died or survived, and that were designated as "no obvious cause" etiology by trained data abstractors were included. Using multisource (medical and coroner) records, an expert panel adjudicated the causes of the OHCAs as: confirmed cardiac causes, confirmed non- cardiac causes, and other causes...
June 7, 2017: Resuscitation
https://www.readbyqxmd.com/read/28590356/plasma-succinate-is-a-predictor-of-mortality-in-critically-injured-patients
#4
Angelo D'Alessandro, Hunter B Moore, Ernest E Moore, Julie A Reisz, Matthew J Wither, Arsen Ghasabyan, James Chandler, Christopher C Silliman, Kirk C Hansen, Anirban Banerjee
BACKGROUND: Trauma is the leading cause of mortality under the age of 40. Recent observations on metabolic reprogramming during hypoxia and ischemia indicate that hypoxic mitochondrial uncoupling promotes the generation of succinate, which in turn mediates reperfusion injury and inflammatory sequelae upon reoxygenation. Plasma levels of succinate significantly increase in response to trauma and hemorrhage in experimental models and clinical samples, suggesting that succinate may represent a candidate marker of systemic perfusion in trauma...
June 6, 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28579457/metformin-ameliorates-gender-and-age-dependent-hemodynamic-instability-and-myocardial-injury-in-murine-hemorrhagic-shock
#5
Dzmitry Matsiukevich, Giovanna Piraino, Patrick Lahni, Paul W Hake, Vivian Wolfe, Michael O'Connor, Jeanne James, Basilia Zingarelli
Severity of multiple organ failure is significantly impacted by age and gender in patients with hemorrhagic shock. However, the molecular mechanisms underlying the enhanced organ injury are not fully understood. AMP-activated protein kinase (AMPK) is a pivotal orchestrator of metabolic responses during stress. We investigated whether hemorrhage-induced myocardial injury is age and gender dependent and whether treatment with metformin, an AMPK activator, affords cardioprotective effects. C57/BL6 young (3-5months) and mature (9-12months) male and female mice were subjected to hemorrhagic shock by blood withdrawing followed by resuscitation with blood and Lactated Ringer's solution...
June 1, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28539742/neutralization-of-inflammation-by-inhibiting-in-vitro-and-in-vivo-secretory-phospholipase-a2-by-ethanol-extract-of-boerhaavia-diffusa-l
#6
Aladahalli S Giresha, Siddanakoppalu N Pramod, A D Sathisha, K K Dharmappa
BACKGROUND: Inflammation is a normal and necessary prerequisite to healing of the injured tissues. Inflammation contributes to all disease process including immunity, vascular pathology, trauma, sepsis, chemical, and metabolic injuries. The secretory phospholipase A2 (sPLA2) is a key enzyme in the production of pro-inflammatory mediators in chronic inflammatory disorders such as rheumatoid arthritis, coronary heart disease, diabetes, and asthma. The sPLA2 also contribute to neuroinflammatory disorders such as Parkinson's, Alzheimer's, and Crohn's disease...
April 2017: Pharmacognosy Research
https://www.readbyqxmd.com/read/28534301/effects-of-acetyl-l-carnitine-in-diabetic-neuropathy-and-other-geriatric-disorders
#7
REVIEW
G Sergi, S Pizzato, F Piovesan, C Trevisan, N Veronese, E Manzato
A long history of diabetes mellitus and increasing age are associated with the onset of diabetic neuropathy, a painful and highly disabling complication with a prevalence peaking at 50% among elderly diabetic patients. Acetyl-L-carnitine (ALC) is a molecule derived from the acetylation of carnitine in the mitochondria that has an essential role in energy production. It has recently been proposed as a therapy to improve the symptoms of diabetic neuropathy. ALC is widely distributed in mammalian tissues, including the brain, blood-brain barrier, brain neurons, and astrocytes...
May 22, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28533056/white-matter-damage-after-traumatic-brain-injury-a-role-for-damage-associated-molecular-patterns
#8
REVIEW
Molly Braun, Kumar Vaibhav, Nancy M Saad, Sumbul Fatima, John R Vender, Babak Baban, Md Nasrul Hoda, Krishnan M Dhandapani
Traumatic brain injury (TBI) is a leading cause of mortality and long-term morbidity worldwide. Despite decades of pre-clinical investigation, therapeutic strategies focused on acute neuroprotection failed to improve TBI outcomes. This lack of translational success has necessitated a reassessment of the optimal targets for intervention, including a heightened focus on secondary injury mechanisms. Chronic immune activation correlates with progressive neurodegeneration for decades after TBI; however, significant challenges remain in functionally and mechanistically defining immune activation after TBI...
May 19, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28524074/neurotrauma-the-crosstalk-between-neurotrophins-and-inflammation-in-the-acutely-injured-brain
#9
REVIEW
Lindolfo da Silva Meirelles, Daniel Simon, Andrea Regner
Traumatic brain injury (TBI) is a major cause of morbidity and mortality among young individuals worldwide. Understanding the pathophysiology of neurotrauma is crucial for the development of more effective therapeutic strategies. After the trauma occurs, immediate neurologic damage is produced by the traumatic forces; this primary injury triggers a secondary wave of biochemical cascades together with metabolic and cellular changes, called secondary neural injury. In the scenario of the acutely injured brain, the ongoing secondary injury results in ischemia and edema culminating in an uncontrollable increase in intracranial pressure...
May 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28512432/whole-body-cryotherapy-in-athletes-from-therapy-to-stimulation-an-updated-review-of-the-literature
#10
REVIEW
Giovanni Lombardi, Ewa Ziemann, Giuseppe Banfi
Nowadays, whole-body cryotherapy is a medical physical treatment widely used in sports medicine. Recovery from injuries (e.g., trauma, overuse) and after-season recovery are the main purposes for application. However, the most recent studies confirmed the anti-inflammatory, anti-analgesic, and anti-oxidant effects of this therapy by highlighting the underlying physiological responses. In addition to its therapeutic effects, whole-body cryotherapy has been demonstrated to be a preventive strategy against the deleterious effects of exercise-induced inflammation and soreness...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28501568/polytrauma-induced-hepatic-stress-response-and-the-development-of-liver-insulin-resistance
#11
Robert M Akscyn, J Lee Franklin, Tatyana A Gavrikova, Joseph L Messina
Insulin resistance and metabolic dysfunction are common following injury. Polytrauma is defined as combined injuries to more than one body part or organ system, and is common in modern warfare, as well as automobile and industrial accidents. Polytrauma can include any combination of burn injury, fracture, hemorrhage, trauma to the extremities, and blunt or penetrating trauma. Multiple minor injuries are often more deleterious than a more severe single injury. To investigate the mechanisms of development of insulin resistance following injury, we have developed a rat model of polytrauma which combined soft tissue trauma with burn injury and penetrating gastrointestinal (GI) trauma...
May 10, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28500085/the-most-common-vices-of-men-can-damage-fertility-and-the-health-of-the-next-generation
#12
Tod Fullston, Nicole O McPherson, Deirdre Zander-Fox, Michelle Lane
There is growing evidence from animal and human studies that demonstrate that acquired paternal traits can impair both a male's fertility and the health of his offspring, including advanced age, smoking, stress, trauma, under-nutrition, infection, toxin exposure, and obesity. Curiously, many of these factors manifest as impaired neurological, behavioural, and/or metabolic functioning in offspring. The underlying molecular mechanisms that respond to the paternal environment and act as vectors of intergenerational transmission are beginning to emerge...
May 12, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28496410/clinical-applications-of-iso-inertial-eccentric-overload-yoyo%C3%A2-resistance-exercise
#13
REVIEW
Per A Tesch, Rodrigo Fernandez-Gonzalo, Tommy R Lundberg
In the quest for a viable non-gravity dependent method to "lift weights" in space, our laboratory introduced iso-inertial resistance (YoYo™) exercise using spinning flywheel(s), more than 25 years ago. After being thoroughly tested in individuals subjected to various established spaceflight analogs, a multi-mode YoYo™ exercise apparatus was eventually installed on the International Space Station in 2009. The method, applicable to any muscle group, provides accommodated resistance and optimal muscle loading through the full range of motion of concentric actions, and brief episodes of eccentric overload...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28451864/prolotherapy-induces-an-inflammatory-response-in-human-tenocytes-in-vitro
#14
Emmanuel C Ekwueme, Mahir Mohiuddin, Jazmin A Yarborough, P Gunnar Brolinson, Denitsa Docheva, Hugo A M Fernandes, Joseph W Freeman
BACKGROUND: Proliferative therapy, or prolotherapy, is a controversial treatment method for many connective tissue injuries and disorders. It involves the injection of a proliferant, or irritant solution, into the site of injury, which causes small-scale cell death. This therapeutic trauma is theorized to initiate the body's wound-healing cascade, perhaps leading to tissue repair. The immediate effects of many of these proliferants are poorly characterized, as are the cellular responses to them; here, we sought to evaluate the immediate effects of two common proliferants (dextrose and P2G, a combination of phenol, glucose, and glycerin) on the cellular response of human tenocytes, and begin to explicate the mechanisms with which each proliferant functions...
April 27, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28448295/the-role-of-mitochondrial-stress-in-muscle-wasting-following-severe-burn-trauma
#15
John O Ogunbileje, David N Herndon, Andrew J Murton, Craig Porter
Increased resting metabolic rate (hypermetabolism) and skeletal muscle wasting are hallmarks of the pathophysiological stress response to severe burn trauma. However, whether these two responses occur independently in burn patients or are in fact related remains unclear. In light of recent evidence demonstrating that increased proteolysis in skeletal muscle of burned patients is accompanied by mitochondrial hypermetabolism, oxidative stress, and protein damage; in this article, we discuss the evidence for a role for the mitochondrion in skeletal muscle wasting following severe burn trauma...
April 21, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28400499/the-coherence-of-macrocirculation-microcirculation-and-tissue-metabolic-response-during-nontraumatic-hemorrhagic-shock-in-swine
#16
Halvor Langeland, Oddveig Lyng, Petter Aadahl, Nils-Kristian Skjærvold
Hemorrhagic shock is clinically observed as changes in macrocirculatory indices, while its main pathological constituent is cellular asphyxia due to microcirculatory alterations. The coherence between macro- and microcirculatory changes in different shock states has been questioned. This also applies to the hemorrhagic shock. Most studies, as well as clinical situations, of hemorrhagic shock include a "second hit" by tissue trauma. It is therefore unclear to what extent the hemorrhage itself contributes to this lack of circulatory coherence...
April 2017: Physiological Reports
https://www.readbyqxmd.com/read/28388377/how-many-nonprotein-calories-does-a-critically-ill-patient-require-a-case-for-hypocaloric-nutrition-in-the-critically-ill-patient
#17
Saúl J Rugeles, Juan B Ochoa Gautier, Roland N Dickerson, Jorge A Coss-Bu, Jan Wernerman, Douglas Paddon-Jones
Calculation of energy and protein doses for critically ill patients is still a matter of controversy. For more than 40 years of nutrition support, the total amount of nutrients to be delivered to these patients has been calculated based on expert recommendations, and this calculation is based on the administration of nonprotein calories in one attempt to ameliorate catabolic response and avoid the weight loss. New evidence suggests protein delivery is the most important intervention to improve clinical and metabolic outcomes...
April 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28386315/protective-benefits-of-amp-activated-protein-kinase-in-hepatic-ischemia-reperfusion-injury
#18
REVIEW
Min Zhang, Dan Yang, Xianqiong Gong, Pu Ge, Jie Dai, Ling Lin, Li Zhang
Hepatic ischemia-reperfusion injury (HIRI) is a major cause of hepatic failure and death after liver trauma, haemorrhagic shock, resection surgery and liver transplantation. AMP-activated protein kinase (AMPK) is an energy sensitive kinase that plays crucial roles in the regulation of metabolic homeostasis. In HIRI, ischemia induces the decline of ATP and the increased ratio of AMP/ATP, which promotes the phosphorylation and activation of AMPK. Three AMPK kinases, liver kinase B1 (LKB1), Ca(2+)/calmodulin-depedent protein kinase kinase β (CaMKKβ) and TGF-β-activated kinase-1 (TAK1), are main upstream kinases for the phosphorylation of AMPK...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28324701/stress-reactivity-and-its-effects-on-subsequent-food-intake-in-depressed-and-healthy-women-with-and-without-adverse-childhood-experiences
#19
Katja Wingenfeld, Linn K Kuehl, Anita Boeker, Katharina Schultebraucks, Kristin Ritter, Julian Hellmann-Regen, Christian Otte, Carsten Spitzer
BACKGROUND: Adverse childhood experiences (ACE) increase the risk to develop major depressive disorder (MDD) and obesity or metabolic syndrome in adulthood. In addition, ACE may be associated with an exaggerated endocrine response to stress, which, in turn, may lead to enhanced food intake resulting in obesity and metabolic problems. METHODS: We systematically examined the stress response and consecutive food intake in 32 women with MDD and ACE as determined by a clinical interview (Early Trauma Inventory), 52 women with MDD without ACE, 22 women with ACE but no current or lifetime MDD and 37 healthy women without either MDD or ACE...
June 2017: Psychoneuroendocrinology
https://www.readbyqxmd.com/read/28284836/exciting-and-not-so-exciting-roles-of-pannexins
#20
REVIEW
Eliana Scemes, Jana Velíšková
It is the current view that purinergic signaling regulates many physiological functions. Pannexin1 (Panx1), a member of the gap junction family of proteins is an ATP releasing channel that plays important physio-pathological roles in various tissues, including the CNS. Upon binding to purinergic receptors expressed in neural cells, ATP triggers cellular responses including increased cell proliferation, cell morphology changes, release of cytokines, and regulation of neuronal excitability via release of glutamate, GABA and ATP itself...
March 8, 2017: Neuroscience Letters
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