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1.
Emerg Radiol ; 31(1): 53-61, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38150084

RESUMEN

PURPOSE: Following motor vehicle collisions (MVCs), patients often undergo extensive computed tomography (CT) imaging. However, pregnant trauma patients (PTPs) represent a unique population where the risk of fetal radiation may supersede the benefits of liberal CT imaging. This study sought to evaluate imaging practices for PTPs, hypothesizing variability in CT imaging among trauma centers. If demonstrated, this might suggest the need to develop specific guidelines to standardize practice. METHODS: A multicenter retrospective study (2016-2021) was performed at 12 Level-I/II trauma centers. Adult (≥18 years old) PTPs involved in MVCs were included, with no patients excluded. The primary outcome was the frequency of CT. Chi-square tests were used to compare categorical variables, and ANOVA was used to compare the means of normally distributed continuous variables. RESULTS: A total of 729 PTPs sustained MVCs (73% at high speed of ≥ 25 miles per hour). Most patients were mildly injured but a small variation of injury severity score (range 1.1-4.6, p < 0.001) among centers was observed. There was a variation of imaging rates for CT head (range 11.8-62.5%, p < 0.001), cervical spine (11.8-75%, p < 0.001), chest (4.4-50.2%, p < 0.001), and abdomen/pelvis (0-57.3%, p < 0.001). In high-speed MVCs, there was variation for CT head (12.5-64.3%, p < 0.001), cervical spine (16.7-75%, p < 0.001), chest (5.9-83.3%, p < 0.001), and abdomen/pelvis (0-60%, p < 0.001). There was no difference in mortality (0-2.9%, p =0.19). CONCLUSION: Significant variability of CT imaging in PTPs after MVCs was demonstrated across 12 trauma centers, supporting the need for standardization of CT imaging for PTPs to reduce unnecessary radiation exposure while ensuring optimal injury identification is achieved.


Asunto(s)
Exposición a la Radiación , Heridas no Penetrantes , Adulto , Femenino , Embarazo , Humanos , Adolescente , Estudios Retrospectivos , Tomografía Computarizada por Rayos X/métodos , Tórax , Centros Traumatológicos
2.
Biochem J ; 478(11): 2145-2161, 2021 06 11.
Artículo en Inglés | MEDLINE | ID: mdl-34032265

RESUMEN

Recent advances in quantitative proteomics show that WD40 proteins play a pivotal role in numerous cellular networks. Yet, they have been fairly unexplored and their physical associations with other proteins are ambiguous. A quantitative understanding of these interactions has wide-ranging significance. WD40 repeat protein 5 (WDR5) interacts with all members of human SET1/MLL methyltransferases, which regulate methylation of the histone 3 lysine 4 (H3K4). Here, using real-time binding measurements in a high-throughput setting, we identified the kinetic fingerprint of transient associations between WDR5 and 14-residue WDR5 interaction (Win) motif peptides of each SET1 protein (SET1Win). Our results reveal that the high-affinity WDR5-SET1Win interactions feature slow association kinetics. This finding is likely due to the requirement of SET1Win to insert into the narrow WDR5 cavity, also named the Win binding site. Furthermore, our explorations indicate fairly slow dissociation kinetics. This conclusion is in accordance with the primary role of WDR5 in maintaining the functional integrity of a large multisubunit complex, which regulates the histone methylation. Because the Win binding site is considered a key therapeutic target, the immediate outcomes of this study could form the basis for accelerated developments in medical biotechnology.


Asunto(s)
N-Metiltransferasa de Histona-Lisina/metabolismo , Péptidos y Proteínas de Señalización Intracelular/metabolismo , Fragmentos de Péptidos/metabolismo , Dominios y Motivos de Interacción de Proteínas , Secuencias de Aminoácidos , Sitios de Unión , N-Metiltransferasa de Histona-Lisina/química , N-Metiltransferasa de Histona-Lisina/genética , Humanos , Péptidos y Proteínas de Señalización Intracelular/química , Péptidos y Proteínas de Señalización Intracelular/genética , Cinética , Fragmentos de Péptidos/química , Fragmentos de Péptidos/genética , Unión Proteica , Conformación Proteica
3.
Pediatr Surg Int ; 38(2): 307-315, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-34853885

RESUMEN

PURPOSE: The COVID-19 pandemic resulted in increased penetrating trauma and decreased length of stay (LOS) amongst the adult trauma population, findings important for resource allocation. Studies regarding the pediatric trauma population are sparse and mostly single-center. This multicenter study examined pediatric trauma patients, hypothesizing increased penetrating trauma and decreased LOS after the 3/19/2020 stay-at-home (SAH) orders. METHODS: A multicenter retrospective analysis of trauma patients ≤ 17 years old presenting to 11 centers in California was performed. Demographic data, injury characteristics, and outcomes were collected. Patients were divided into three groups based on injury date: 3/19/2019-6/30/2019 (CONTROL), 1/1/2020-3/18/2020 (PRE), 3/19/2020-6/30/2020 (POST). POST was compared to PRE and CONTROL in separate analyses. RESULTS: 1677 patients were identified across all time periods (CONTROL: 631, PRE: 479, POST: 567). POST penetrating trauma rates were not significantly different compared to both PRE (11.3 vs. 9.0%, p = 0.219) and CONTROL (11.3 vs. 8.2%, p = 0.075), respectively. POST had a shorter mean LOS compared to PRE (2.4 vs. 3.3 days, p = 0.002) and CONTROL (2.4 vs. 3.4 days, p = 0.002). POST was also not significantly different than either group regarding intensive care unit (ICU) LOS, ventilator days, and mortality (all p > 0.05). CONCLUSIONS: This multicenter retrospective study demonstrated no difference in penetrating trauma rates among pediatric patients after SAH orders but did identify a shorter LOS.


Asunto(s)
COVID-19 , Adolescente , Adulto , California/epidemiología , Niño , Humanos , Puntaje de Gravedad del Traumatismo , Tiempo de Internación , Pandemias , Estudios Retrospectivos , SARS-CoV-2 , Centros Traumatológicos
4.
Glia ; 69(12): 2863-2881, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34399014

RESUMEN

Therapeutics that promote oligodendrocyte survival and remyelination are needed to restore neurological function in demyelinating diseases. Sphingosine 1-phosphate (S1P) is an essential lipid metabolite that signals through five G-protein coupled receptors. S1P receptor agonists such as Fingolimod are valuable immunosuppressants used to treat multiple sclerosis, and promote oligodendrocyte survival. However, the role for endogenous S1P, synthesized by the enzyme sphingosine kinase 2 (SphK2), in oligodendrocyte survival and myelination has not been established. This study investigated the requirement for SphK2 in oligodendrocyte survival and remyelination using the cuprizone mouse model of acute demyelination, followed by spontaneous remyelination. Oligodendrocyte density did not differ between untreated wild-type (WT) and SphK2 knockout (SphK2-/- ) mice. However, cuprizone treatment caused significantly greater loss of mature oligodendrocytes in SphK2-/- compared to WT mice. Following cuprizone withdrawal, spontaneous remyelination occurred in WT but not SphK2-/- mice, even though progenitor and mature oligodendrocyte density increased in both genotypes. Levels of cytotoxic sphingosine and ceramide were higher in the corpus callosum of SphK2-/- mice, and in contrast to WT mice, did not decline following cuprizone withdrawal in SphK2-/- mice. We also observed a significant reduction in myelin thickness with aging in SphK2-/- compared to WT mice. These results provide the first evidence that SphK2, the dominant enzyme catalyzing S1P synthesis in the adult brain, is essential for remyelination following a demyelinating insult and myelin maintenance with aging. We propose that persistently high levels of sphingosine and ceramide, a direct consequence of SphK2 deficiency, may block remyelination.


Asunto(s)
Enfermedades Desmielinizantes , Remielinización , Animales , Cuerpo Calloso/metabolismo , Cuprizona/toxicidad , Enfermedades Desmielinizantes/inducido químicamente , Enfermedades Desmielinizantes/metabolismo , Modelos Animales de Enfermedad , Ratones , Ratones Endogámicos C57BL , Vaina de Mielina/metabolismo , Oligodendroglía/metabolismo , Fosfotransferasas (Aceptor de Grupo Alcohol)
5.
Ann Surg ; 274(2): 298-305, 2021 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-33914467

RESUMEN

OBJECTIVE: The purpose of this review was to provide an evidence-based recommendation for community-based programs to mitigate gun violence, from the Eastern Association for the Surgery of Trauma (EAST). SUMMARY BACKGROUND DATA: Firearm Injury leads to >40,000 annual deaths and >115,000 injuries annually in the United States. Communities have adopted culturally relevant strategies to mitigate gun related injury and death. Two such strategies are gun buyback programs and community-based violence prevention programs. METHODS: The Injury Control and Violence Prevention Committee of EAST developed Population, Intervention, Comparator, Outcomes (PICO) questions and performed a comprehensive literature and gray web literature search. Using GRADE methodology, they reviewed and graded the literature and provided consensus recommendations informed by the literature. RESULTS: A total of 19 studies were included for analysis of gun buyback programs. Twenty-six studies were reviewed for analysis for community-based violence prevention programs. Gray literature was added to the discussion of PICO questions from selected websites. A conditional recommendation is made for the implementation of community-based gun buyback programs and a conditional recommendation for community-based violence prevention programs, with special emphasis on cultural appropriateness and community input. CONCLUSIONS: Gun violence may be mitigated by community-based efforts, such as gun buybacks or violence prevention programs. These programs come with caveats, notably community cultural relevance and proper support and funding from local leadership.Level of Evidence: Review, Decision, level III.


Asunto(s)
Servicios de Salud Comunitaria/organización & administración , Violencia con Armas/prevención & control , Heridas por Arma de Fuego/epidemiología , Humanos , Estados Unidos/epidemiología , Heridas por Arma de Fuego/cirugía
6.
Am J Drug Alcohol Abuse ; 47(5): 605-611, 2021 09 03.
Artículo en Inglés | MEDLINE | ID: mdl-34087086

RESUMEN

Background: COVID-19 related stay-at-home (SAH) orders created many economic and social stressors, possibly increasing the risk of drug/alcohol abuse in the community and trauma population.Objectives: Describe changes in alcohol/drug use in traumatically injured patients after SAH orders in California and evaluate demographic or injury pattern changes in alcohol or drug-positive patients.Methods: A retrospective analysis of 11 trauma centers in Southern California (1/1/2020-6/30/2020) was performed. Blood alcohol concentration, urine toxicology results, demographics, and injury characteristics were collected. Patients were grouped based on injury date - before SAH (PRE-SAH), immediately after SAH (POST-SAH), and a historical comparison (3/19/2019-6/30/2019) (CONTROL) - and compared in separate analyses. Groups were compared using chi-square tests for categorical variables and Mann-Whitney U tests for continuous variables.Results: 20,448 trauma patients (13,634 male, 6,814 female) were identified across three time-periods. The POST-SAH group had higher rates of any drug (26.2% vs. 21.6% and 24.7%, OR = 1.26 and 1.08, p < .001 and p = .035), amphetamine (10.4% vs. 7.5% and 9.3%, OR = 1.43 and 1.14, p < .001 and p = .023), tetrahydrocannabinol (THC) (13.8% vs. 11.0% and 11.4%, OR = 1.30 and 1.25, p < .001 and p < .001), and 3,4-methylenedioxy methamphetamine (MDMA) (0.8% vs. 0.4% and 0.2%, OR = 2.02 and 4.97, p = .003 and p < .001) positivity compared to PRE-SAH and CONTROL groups. Alcohol concentration and positivity were similar between groups (p > .05).Conclusion: This Southern California multicenter study demonstrated increased amphetamine, MDMA, and THC positivity in trauma patients after SAH, but no difference in alcohol positivity or blood concentration. Drug prevention strategies should continue to be adapted within and outside of hospitals during a pandemic.


Asunto(s)
COVID-19/epidemiología , Detección de Abuso de Sustancias/estadística & datos numéricos , Trastornos Relacionados con Sustancias/epidemiología , Adulto , California/epidemiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Cuarentena/legislación & jurisprudencia , Estudios Retrospectivos , SARS-CoV-2 , Centros Traumatológicos , Adulto Joven
7.
South Econ J ; 87(4): 1119-1137, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-33821053

RESUMEN

How can public policy best deal with infectious disease? In answering this question, scholarship on the optimal control of infectious disease adopts the model of a benevolent social planner who maximizes social welfare. This approach, which treats the social health planner as a unitary "public health brain" standing outside of society, removes the policymaking process from economic analysis. This paper opens the black box of the social health planner by extending the tools of economics to the policymaking process itself. We explore the nature of the economic problem facing policymakers and the epistemic constraints they face in trying to solve that problem. Additionally, we analyze the incentives facing policymakers in their efforts to address infectious diseases and consider how they affect the design and implementation of public health policy. Finally, we consider how unanticipated system effects emerge due to interventions in complex systems, and how these effects can undermine well-intentioned efforts to improve human welfare. We illustrate the various dynamics of the political economy of state responses to infectious disease by drawing on a range of examples from the COVID-19 pandemic.

8.
J Neurosci ; 39(48): 9645-9659, 2019 11 27.
Artículo en Inglés | MEDLINE | ID: mdl-31641049

RESUMEN

Sphingosine 1-phosphate (S1P) is a potent vasculoprotective and neuroprotective signaling lipid, synthesized primarily by sphingosine kinase 2 (SK2) in the brain. We have reported pronounced loss of S1P and SK2 activity early in Alzheimer's disease (AD) pathogenesis, and an inverse correlation between hippocampal S1P levels and age in females, leading us to speculate that loss of S1P is a sensitizing influence for AD. Paradoxically, SK2 was reported to mediate amyloid ß (Aß) formation from amyloid precursor protein (APP) in vitro To determine whether loss of S1P sensitizes to Aß-mediated neurodegeneration, we investigated whether SK2 deficiency worsens pathology and memory in male J20 (PDGFB-APPSwInd) mice. SK2 deficiency greatly reduced Aß content in J20 mice, associated with significant improvements in epileptiform activity and cross-frequency coupling measured by hippocampal electroencephalography. However, several key measures of APPSwInd-dependent neurodegeneration were enhanced on the SK2-null background, despite reduced Aß burden. These included hippocampal volume loss, oligodendrocyte attrition and myelin loss, and impaired performance in Y-maze and social novelty memory tests. Inhibition of the endosomal cholesterol exporter NPC1 greatly reduced sphingosine phosphorylation in glial cells, linking loss of SK2 activity and S1P in AD to perturbed endosomal lipid metabolism. Our findings establish SK2 as an important endogenous regulator of both APP processing to Aß, and oligodendrocyte survival, in vivo These results urge greater consideration of the roles played by oligodendrocyte dysfunction and altered membrane lipid metabolic flux as drivers of neurodegeneration in AD.SIGNIFICANCE STATEMENT Genetic, neuropathological, and functional studies implicate both Aß and altered lipid metabolism and/or signaling as key pathogenic drivers of Alzheimer's disease. In this study, we first demonstrate that the enzyme SK2, which generates the signaling lipid S1P, is required for Aß formation from APP in vivo Second, we establish a new role for SK2 in the protection of oligodendrocytes and myelin. Loss of SK2 sensitizes to Aß-mediated neurodegeneration by attenuating oligodendrocyte survival and promoting hippocampal atrophy, despite reduced Aß burden. Our findings support a model in which Aß-independent sensitizing influences such as loss of neuroprotective S1P are more important drivers of neurodegeneration than gross Aß concentration or plaque density.


Asunto(s)
Enfermedad de Alzheimer/metabolismo , Enfermedades Desmielinizantes/metabolismo , Modelos Animales de Enfermedad , Hipocampo/metabolismo , Fosfotransferasas (Aceptor de Grupo Alcohol)/metabolismo , Placa Amiloide/metabolismo , Enfermedad de Alzheimer/patología , Animales , Enfermedades Desmielinizantes/patología , Enfermedades Desmielinizantes/prevención & control , Femenino , Hipocampo/patología , Masculino , Ratones , Ratones Transgénicos , Neuroprotección/fisiología , Técnicas de Cultivo de Órganos , Tamaño de los Órganos/fisiología , Fosfotransferasas (Aceptor de Grupo Alcohol)/genética , Placa Amiloide/patología
9.
Chembiochem ; 21(6): 825-835, 2020 03 16.
Artículo en Inglés | MEDLINE | ID: mdl-31553819

RESUMEN

Antibiotics are known to promote bacterial formation of enhanced biofilms, the mechanism of which is not well understood. Here, using biolayer interferometry, we have shown that bacterial cultures containing antibiotics that target cell walls cause biomass deposition on surfaces over time with a linear profile rather than the Langmuir-like profiles exhibited by bacterial adherence in the absence of antibiotics. We observed about three times the initial rate and 12 times the final biomass deposition on surfaces for cultures containing carbenicillin than without. Unexpectedly, in the presence of antibiotics, the rate of biomass deposition inversely correlated with bacterial densities from different stages of a culture. Detailed studies revealed that carbenicillin caused faster growth of filaments that were seeded on surfaces from young bacteria (from lag phase) than those from high-density fast-growing bacteria, with rates of filament elongation of about 0.58 and 0.13 µm min-1 , respectively. With surfaces that do not support bacterial adherence, few filaments were observed even in solution. These filaments aggregated in solution and formed increased amounts of biofilms on surfaces. These results reveal the lifestyle of antibiotic-induced filamentous bacteria, as well as one way in which the antibiotics promote biofilm formation.


Asunto(s)
Antibacterianos/farmacología , Biopelículas/efectos de los fármacos , Carbenicilina/farmacología , Pared Celular/efectos de los fármacos , Escherichia coli/efectos de los fármacos , Pseudomonas aeruginosa/efectos de los fármacos , Adhesión Bacteriana/efectos de los fármacos , Escherichia coli/citología , Pruebas de Sensibilidad Microbiana , Pseudomonas aeruginosa/citología , Propiedades de Superficie
10.
Biochim Biophys Acta Bioenerg ; 1859(9): 775-788, 2018 09.
Artículo en Inglés | MEDLINE | ID: mdl-29932911

RESUMEN

F-type ATP synthases are extraordinary multisubunit proteins that operate as nanomotors. The Escherichia coli (E. coli) enzyme uses the proton motive force (pmf) across the bacterial plasma membrane to drive rotation of the central rotor subunits within a stator subunit complex. Through this mechanical rotation, the rotor coordinates three nucleotide binding sites that sequentially catalyze the synthesis of ATP. Moreover, the enzyme can hydrolyze ATP to turn the rotor in the opposite direction and generate pmf. The direction of net catalysis, i.e. synthesis or hydrolysis of ATP, depends on the cell's bioenergetic conditions. Different control mechanisms have been found for ATP synthases in mitochondria, chloroplasts and bacteria. This review discusses the auto-inhibitory behavior of subunit ε found in FOF1-ATP synthases of many bacteria. We focus on E. coli FOF1-ATP synthase, with insights into the regulatory mechanism of subunit ε arising from structural and biochemical studies complemented by single-molecule microscopy experiments.


Asunto(s)
Adenosina Trifosfato/metabolismo , Proteínas de Escherichia coli/metabolismo , Escherichia coli/enzimología , ATPasas de Translocación de Protón/metabolismo , Metabolismo Energético , Subunidades de Proteína/metabolismo
12.
J Biol Chem ; 290(34): 21032-21041, 2015 Aug 21.
Artículo en Inglés | MEDLINE | ID: mdl-26160173

RESUMEN

F-type ATP synthases are rotary nanomotor enzymes involved in cellular energy metabolism in eukaryotes and eubacteria. The ATP synthase from Gram-positive and -negative model bacteria can be autoinhibited by the C-terminal domain of its ϵ subunit (ϵCTD), but the importance of ϵ inhibition in vivo is unclear. Functional rotation is thought to be blocked by insertion of the latter half of the ϵCTD into the central cavity of the catalytic complex (F1). In the inhibited state of the Escherichia coli enzyme, the final segment of ϵCTD is deeply buried but has few specific interactions with other subunits. This region of the ϵCTD is variable or absent in other bacteria that exhibit strong ϵ-inhibition in vitro. Here, genetically deleting the last five residues of the ϵCTD (ϵΔ5) caused a greater defect in respiratory growth than did the complete absence of the ϵCTD. Isolated membranes with ϵΔ5 generated proton-motive force by respiration as effectively as with wild-type ϵ but showed a nearly 3-fold decrease in ATP synthesis rate. In contrast, the ϵΔ5 truncation did not change the intrinsic rate of ATP hydrolysis with membranes. Further, the ϵΔ5 subunit retained high affinity for isolated F1 but reduced the maximal inhibition of F1-ATPase by ϵ from >90% to ∼20%. The results suggest that the ϵCTD has distinct regulatory interactions with F1 when rotary catalysis operates in opposite directions for the hydrolysis or synthesis of ATP.


Asunto(s)
Adenosina Trifosfato/metabolismo , Secuencia de Bases , Proteínas de Escherichia coli/química , Escherichia coli/genética , Proteínas/química , Protones , Eliminación de Secuencia , Adenosina Trifosfato/química , Biocatálisis , Membrana Celular/química , Membrana Celular/metabolismo , Escherichia coli/enzimología , Escherichia coli/crecimiento & desarrollo , Proteínas de Escherichia coli/genética , Proteínas de Escherichia coli/metabolismo , Expresión Génica , Hidrólisis , Cinética , Modelos Moleculares , Datos de Secuencia Molecular , Estructura Terciaria de Proteína , Proteínas/genética , Proteínas/metabolismo , Fuerza Protón-Motriz , Termodinámica , Proteína Inhibidora ATPasa
15.
J Biol Chem ; 288(13): 9383-95, 2013 Mar 29.
Artículo en Inglés | MEDLINE | ID: mdl-23400782

RESUMEN

F1-ATPase is the catalytic complex of rotary nanomotor ATP synthases. Bacterial ATP synthases can be autoinhibited by the C-terminal domain of subunit ε, which partially inserts into the enzyme's central rotor cavity to block functional subunit rotation. Using a kinetic, optical assay of F1·Îµ binding and dissociation, we show that formation of the extended, inhibitory conformation of ε (εX) initiates after ATP hydrolysis at the catalytic dwell step. Prehydrolysis conditions prevent formation of the εX state, and post-hydrolysis conditions stabilize it. We also show that ε inhibition and ADP inhibition are distinct, competing processes that can follow the catalytic dwell. We show that the N-terminal domain of ε is responsible for initial binding to F1 and provides most of the binding energy. Without the C-terminal domain, partial inhibition by the ε N-terminal domain is due to enhanced ADP inhibition. The rapid effects of catalytic site ligands on conformational changes of F1-bound ε suggest dynamic conformational and rotational mobility in F1 that is paused near the catalytic dwell position.


Asunto(s)
Adenosina Difosfato/química , Adenosina Trifosfato/química , Escherichia coli/metabolismo , ATPasas de Translocación de Protón/química , Antibacterianos/farmacología , Transporte Biológico , Reactivos de Enlaces Cruzados/farmacología , Relación Dosis-Respuesta a Droga , Diseño de Fármacos , Hidrólisis , Cinética , Ligandos , Modelos Moleculares , Conformación Molecular , Plásmidos/metabolismo , Conformación Proteica , Estructura Terciaria de Proteína , ATPasas de Translocación de Protón/metabolismo , Factores de Tiempo
16.
Int J Surg Case Rep ; 116: 109423, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38430894

RESUMEN

INTRODUCTION AND IMPORTANCE: Lung herniation following trauma is a rare occurrence, and consensus on optimal surgical repair techniques remains limited. While small herniations may resolve without surgery, intervention becomes necessary in cases of unsuccessful non-operative management or concurrent rib fracture stabilization. Mesh application in repair poses a dilemma, often providing physical support but raising infection concerns, particularly in trauma scenarios with delayed closure. Surgical stabilization of rib fractures, employing hardware similar to orthopedic procedures, may necessitate prophylactic antibiotics, though empirical evidence supporting routine use is scant. Polytrauma patients often resort to delayed chest closure techniques during methodical surgical planning, but these carry potential consequences compared to immediate closure. CASE PRESENTATION: Presented is a case involving a patient in a motorcycle collision sustaining multiple injuries, necessitating a massive transfusion protocol, multiple surgeries, including delayed chest closure, and eventual surgical rib fixation four days post-injury. During rib stabilization, exacerbation of traumatic lung herniation mandated mesh repair, prompting the cautious use of prophylactic vancomycin powder to mitigate infection risks. DISCUSSION: A review of the literature revealed a scarcity of similar cases, particularly those involving lung herniation with delayed chest closure, the use of prophylactic antibiotics and mesh in polytrauma. CONCLUSION: This case underscores the lack of depth of comprehensive research guiding surgical decisions concerning lung herniation and the prophylactic use of vancomycin powder in trauma patients.

17.
J Trauma Acute Care Surg ; 96(1): 109-115, 2024 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-37580875

RESUMEN

BACKGROUND: Pregnant trauma patients (PTPs) undergo observation and fetal monitoring following trauma due to possible fetal delivery (FD) or adverse outcome. There is a paucity of data on PTP outcomes, especially related to risk factors for FD. We aimed to identify predictors of posttraumatic FD in potentially viable pregnancies. METHODS: All PTPs (≥18 years) with ≥24-weeks gestational age were included in this multicenter retrospective study at 12 Level-I and II trauma centers between 2016 and 2021. Pregnant trauma patients who underwent FD ((+) FD) were compared to those who did not deliver ((-) FD) during the index hospitalization. Univariate analyses and multivariable logistic regression were performed to identify predictors of FD. RESULTS: Of 591 PTPs, 63 (10.7%) underwent FD, with 4 (6.3%) maternal deaths. The (+) FD group was similar in maternal age (27 vs. 28 years, p = 0.310) but had older gestational age (37 vs. 30 weeks, p < 0.001) and higher mean injury severity score (7.0 vs. 1.5, p < 0.001) compared with the (-) FD group. The (+) FD group had higher rates of vaginal bleeding (6.3% vs. 1.1%, p = 0.002), uterine contractions (46% vs. 23.5%, p < 0.001), and abnormal fetal heart tracing (54.7% vs. 14.6%, p < 0.001). On multivariate analysis, independent predictors for (+) FD included abdominal injury (odds ratio [OR], 4.07; confidence interval [CI], 1.11-15.02; p = 0.035), gestational age (OR, 1.68 per week ≥24 weeks; CI, 1.44-1.95; p < 0.001), abnormal FHT (OR, 12.72; CI, 5.19-31.17; p < 0.001), and premature rupture of membranes (OR, 35.97; CI, 7.28-177.74; p < 0.001). CONCLUSION: The FD rate was approximately 10% for PTPs with viable fetal gestational age. Independent risk factors for (+) FD included maternal and fetal factors, many of which are available on initial trauma bay evaluation. These risk factors may help predict FD in the trauma setting and shape future guidelines regarding the recommended observation of PTPs. LEVEL OF EVIDENCE: Therapeutic/Care Management; Level III.


Asunto(s)
Traumatismos Abdominales , Embarazo , Femenino , Humanos , Recién Nacido , Estudios Retrospectivos , Edad Gestacional , Factores de Riesgo
18.
Updates Surg ; 2024 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-38554224

RESUMEN

Nearly 10% of pregnant women suffer traumatic injury. Clinical outcomes for pregnant trauma patients (PTPs) with severe injuries have not been well studied. We sought to describe outcomes for PTPs presenting with severe injuries, hypothesizing that PTPs with severe injuries will have higher rates of complications and mortality compared to less injured PTPs. A post-hoc analysis of a multi-institutional retrospective study at 12 Level-I/II trauma centers was performed. Patients were stratified into severely injured (injury severity score [ISS] > 15) and not severely injured (ISS < 15) and compared with bivariate analyses. From 950 patients, 32 (3.4%) had severe injuries. Compared to non-severely injured PTPs, severely injured PTPs were of similar maternal age but had younger gestational age (21 vs 26 weeks, p = 0.009). Penetrating trauma was more common in the severely injured cohort (15.6% vs 1.4%, p < 0.001). The severely injured cohort more often underwent an operation (68.8% vs 3.8%, p < 0.001), including a hysterectomy (6.3% vs 0.3%, p < 0.001). The severely injured group had higher rates of complications (34.4% vs 0.9%, p < 0.001), mortality (15.6% vs 0.1%, p < 0.001), a higher rate of fetal delivery (37.5% vs. 6.0%, p < 0.001) and resuscitative hysterotomy (9.4% vs. 0%, p < 0.001). Only approximately 3% of PTPs were severely injured. However, severely injured PTPs had a nearly 40% rate of fetal delivery as well as increased complications and mortality. This included a resuscitative hysterotomy rate of nearly 10%. Significant vigilance must remain when caring for this population.

19.
Biochem Soc Trans ; 41(5): 1219-26, 2013 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-24059511

RESUMEN

Subunit rotation is the mechanochemical intermediate for the catalytic activity of the membrane enzyme FoF1-ATP synthase. smFRET (single-molecule FRET) studies have provided insights into the step sizes of the F1 and Fo motors, internal transient elastic energy storage and controls of the motors. To develop and interpret smFRET experiments, atomic structural information is required. The recent F1 structure of the Escherichia coli enzyme with the ϵ-subunit in an inhibitory conformation initiated a study for real-time monitoring of the conformational changes of ϵ. The present mini-review summarizes smFRET rotation experiments and previews new smFRET data on the conformational changes of the CTD (C-terminal domain) of ϵ in the E. coli enzyme.


Asunto(s)
Escherichia coli/enzimología , ATPasas de Translocación de Protón Mitocondriales/química , Conformación Proteica , Escherichia coli/química , Transferencia Resonante de Energía de Fluorescencia , Estructura Terciaria de Proteína , Subunidades de Proteína/química
20.
Am Surg ; 89(11): 4353-4359, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-35757933

RESUMEN

BACKGROUND: Domestic violence (DV) worsened during COVID-19 and Family Justice Centers (FJCs) were, even more so than before, a critical part of providing services to DV victims. This study characterizes the clinical and sociodemographic features of the clients that come to the Ventura County FJC (VCFJC) and examines the effect of COVID-19, thus informing awareness of services available to victims of DV. METHODS: This was a retrospective cohort study utilizing the VCFJC database from 2019 to 2021. All client data normally collected was studied. A comparison of pre-COVID and post-COVID data was also conducted. RESULTS: There were 3488 client entries. Clients were mostly female (79% [2755]; n = 3488), aged 25-40 (31.73% [1106]; n = 3448), white/Caucasian (44.42% [1531]; n = 3448) or Hispanic/Latinx (42.41% [1462]; n = 3448). Clients most often requested restraining orders (72.41% [2496]; n = 3448), and most commonly reported DV [physical] (47.90% [1651]; n = 3448). Most health-insured clients were covered by MediCal (45.06% [1231]; n = 2732). Pre- and post-COVID analysis showed the highest increases in DV [physical] (odds ratio = 1.26, P < .0007) and stalking/harassment (odds ratio = 2.45, P < .0007), and decreases in all Initial Service Request categories except one. DISCUSSION: In serving clients affected by DV, FJCs are an important service for health care providers to be aware of. Post-COVID, clients reported DV and stalking/harassment at much higher percentages, which is consistent with national studies on the pandemic. The most alarming finding was the steep decrease in Initial Service Requests.Conclusion: This study shows the importance of collaboration and awareness of services, especially in a world of COVID-19.


Asunto(s)
COVID-19 , Violencia Doméstica , Agencias Gubernamentales , Femenino , Humanos , Masculino , California/epidemiología , COVID-19/epidemiología , COVID-19/etnología , Violencia Doméstica/etnología , Violencia Doméstica/estadística & datos numéricos , Agencias Gubernamentales/estadística & datos numéricos , Hispánicos o Latinos/estadística & datos numéricos , Gobierno Local , Pandemias/estadística & datos numéricos , Estudios Retrospectivos , Blanco/estadística & datos numéricos , Adulto
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