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1.
J Anaesthesiol Clin Pharmacol ; 37(3): 336-341, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34759540

RESUMEN

BACKGROUND AND AIMS: Airway management is a key concern in trauma patients with cervical spine fracture. Application of manual inline axial stabilization (MIAS) has become the standard of care in these patients. Indirect laryngoscopy only requires alignment of the pharyngeal and laryngeal axis. Hence the primary objective of the study was to compare two indirect laryngoscopes, Airtraq (with adaptor) and Hansraj Video laryngoscopes based on its Intubation Difficulty Score. MATERIAL AND METHODS: Sixty anesthetized patients were divided into two groups using computer-based randomization, and tracheal intubation was performed using either Airtraq or Hansraj Videolaryngoscope with cervical spine immobilization. RESULTS: Both Airtraq and Hansraj groups were comparable in terms of percentage of glottic opening (POGO) scoring (92 ± 9.88% vs. 89.3 ± 10.4%.) and duration of intubation attempt (14.9 ± 4.36 sec vs. 16.97 ± 3.64 sec). Intubation difficulty scale (IDS) score was significantly shorter with Airtraq (1 ± 0.58 vs. 1.8 ± 0.805; P < 0.0001). The mean duration of time taken for laryngoscopy in Airtraq (12.9 ± 2.07 s vs. 19.06 ± 3.83 s; P < 0.0001)) was significantly shorter and also the duration of time taken to secure airway in Airtraq VL was significantly shorter (29.47 ± 4.75 s vs. 36.03 ± 5.80 sec; P < 0.0001). The heart rate and MABP changes were modest in both groups, but was significantly more in Hansraj VL as compared to Airtraq VL, post-intubation. CONCLUSION: Both Airtraq and Hansraj videolaryngoscope can be used as first-hand device in the scenario of cervical spine stabilization. Airtraq videolaryngoscope is better than Hansraj videolaryngoscope due to shorter IDS and lessor hemodynamic changes.

2.
Pain Pract ; 14(2): E63-8, 2014 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23944980

RESUMEN

INTRODUCTION: Percutaneous anterior abdominal ultrasound guidance for performing celiac plexus neurolysis is a relatively new but more economical, less time-consuming, more comfortable bedside technique for interventional pain management. Paucity of studies evaluating the efficacy of single-site vs. double-site injections at celiac trunk for ultrasound-guided celiac plexus neurolysis (USCPN) prompted us to conduct a prospective, randomized, single-blind clinical trial to compare USCPN using bilateral paramedian (double needle) technique with unilateral paramedian (single needle) technique. METHODS: Sixty patients aged 18 years or older with unresectable upper abdominal cancers were randomized into two groups to receive USCPN. A 20-mL mixture of 50% ethanol with 0.25% bupivacaine was injected either unilaterally (20 mL×1 site) or bilaterally (10 mL×2 sites) depending on the randomization group. Subjects were assessed for the pain relief using Numerical rating scale (NRS) to assess their pain relief. RESULTS: Baseline parameters being comparable (P > 0.05), the site of drug injections (single or double needle) had no bearing on the onset of pain relief and patient satisfaction scores (P > 0.05). Pain relief during follow-up visits was comparable between the two groups (P > 0.05). The discomfort score correlated well with the pain relief scoring without any significant difference between the two groups except in the last visit (at 3 month). Incidences of the complications were comparable in the two groups (P > 0.05). CONCLUSION: Ultrasound-guided celiac plexus neurolysis using unilateral paramedian (single needle) needle-insertion technique is comparable with bilateral paramedian (double needle) needle-insertion technique with regard to pain relief and side effects.


Asunto(s)
Dolor Abdominal/tratamiento farmacológico , Bloqueo Nervioso Autónomo/métodos , Plexo Celíaco/diagnóstico por imagen , Neoplasias de la Vesícula Biliar/fisiopatología , Manejo del Dolor/métodos , Neoplasias Pancreáticas/fisiopatología , Sistemas de Atención de Punto , Dolor Abdominal/etiología , Anestésicos Locales/administración & dosificación , Anestésicos Locales/efectos adversos , Anestésicos Locales/uso terapéutico , Bloqueo Nervioso Autónomo/efectos adversos , Bupivacaína/administración & dosificación , Bupivacaína/efectos adversos , Bupivacaína/uso terapéutico , Plexo Celíaco/efectos de los fármacos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Agujas , Dimensión del Dolor , Método Simple Ciego , Factores de Tiempo , Resultado del Tratamiento , Ultrasonografía
3.
Indian J Anaesth ; 68(1): 52-57, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38406347

RESUMEN

There is a gradual shift in training and teaching methods in the medical field. We are slowly moving from the traditional model and adopting active learning methods like simulation-based training. Airway management is an essential clinical skill for any anaesthesiologist, and a trained anaesthesiologist must perform quick and definitive airway management using various techniques. Airway simulations have been used for the past few decades. It ensures active involvement, upgrading the trainees' airway management knowledge and skills, including basic airway skills, invasive procedures, and difficult clinical scenarios. Trainees also learn non-technical skills such as communication, teamwork, and coordination. A wide range of airway simulators are available. However, texture surface characteristics vary from one type to another. The simulation-based airway management training requires availability, understanding, faculty development, and a structured curriculum for effective delivery. This article explored the available evidence on simulation-based airway management teaching and training.

4.
Indian J Anaesth ; 68(1): 31-35, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38406348

RESUMEN

Simulation can be an excellent teaching and learning method if the scenarios are created appropriately. It starts with assessing the learner's needs and is followed by laying down objectives embracing the SMART principles. While creating a scenario, it is essential to consider the different aspects of realism, such as physical, contextual and psychological aspects. Using moulages and props helps in creating physical realism. The simulation expert should also be aware of the learner's experience and decide the SimZones for their learners based on their level of clinical expertise. The scenario progression needs to be laid down in stages. The role of the embedded participant needs to be decided a priori, and the embedded participant should be well-versed in their role. Pilot testing is a crucial step in simulation development as it keeps the simulation expert aware of the loopholes in the simulation scenario before running.

5.
J Recept Signal Transduct Res ; 33(3): 177-83, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23721574

RESUMEN

Classically heterotrimeric G proteins have been described as the principal signal transducing machinery for G-protein-coupled receptors. Receptor activation catalyzes nucleotide exchange on the Gα protein, enabling Gα-GTP and Gßγ-subunits to engage intracellular effectors to generate various cellular effects such as second messenger production or regulation of ion channel conductivity. Recent genetic and proteomic screens have identified novel heterotrimeric G-protein-interacting proteins and expanded their functional roles. This review highlights some examples of recently identified interacting proteins and summarizes how they functionally connect heterotrimeric G proteins to previously underappreciated cellular roles.


Asunto(s)
Subunidades gamma de la Proteína de Unión al GTP/metabolismo , Proteínas de Unión al GTP Heterotriméricas/genética , Transducción de Señal , Subunidades beta de la Proteína de Unión al GTP/metabolismo , Subunidades gamma de la Proteína de Unión al GTP/genética , Guanosina Trifosfato/metabolismo , Proteínas de Unión al GTP Heterotriméricas/metabolismo , Humanos , Receptores Acoplados a Proteínas G/genética , Receptores Acoplados a Proteínas G/metabolismo
6.
Cureus ; 15(7): e41536, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-37554613

RESUMEN

Anaplasmosis, caused by the tick-borne bacterium Anaplasma phagocytophilum, is an emerging infectious disease with a broad spectrum of clinical manifestations. Here, we present a case report of a 66-year-old Caucasian woman residing in Connecticut who exhibited severe anaplasmosis with multi-organ involvement. The patient, with a medical history of rheumatoid arthritis and hypothyroidism, presented with confusion, lethargy, fever, myalgia, generalized weakness, and poor appetite in May 2023. Laboratory investigations revealed pancytopenia, hyponatremia, elevated liver enzymes with mild hyperbilirubinemia, and lactic acidosis. A buffy coat smear analysis demonstrated basophilic intracytoplasmic inclusion bodies in the neutrophils, supporting the diagnosis of severe anaplasmosis. Prompt administration of doxycycline, the recommended treatment for anaplasmosis, was initiated. However, the patient subsequently developed acute respiratory distress syndrome (ARDS) necessitating heated humidified high-flow nasal cannula (HFNC) therapy. Anaplasma polymerase chain reaction (PCR) confirmed the presence of the bacterium in the patient's blood. Following doxycycline treatment, the patient demonstrated improvement in peripheral blood findings, resolution of ARDS, and complete neurologic recovery. This case underscores the potential severity and diverse clinical manifestations of anaplasmosis, highlighting the importance of early recognition, prompt diagnosis, and timely initiation of appropriate treatment to prevent severe complications and improve patient outcomes.

7.
J Biol Chem ; 286(47): 40922-33, 2011 Nov 25.
Artículo en Inglés | MEDLINE | ID: mdl-21969374

RESUMEN

The calcium-sensing receptor (CaSR) is a family C G protein-coupled receptor that is activated by elevated levels of extracellular divalent cations. The CaSR couples to members of the G(q) family of G proteins, and in the endocrine system this receptor is instrumental in regulating the release of parathyroid hormone from the parathyroid gland and calcitonin from thyroid cells. Here, we demonstrate that in medullary thyroid carcinoma cells, the CaSR promotes cellular adhesion and migration via coupling to members of the integrin family of extracellular matrix-binding proteins. Immunopurification and mass spectrometry, co-immunoprecipitation, and co-localization studies showed that the CaSR and ß1-containing integrins are components of a macromolecular protein complex. In fibronectin-based cell adhesion and migration assays, the CaSR-positive allosteric modulator NPS R-568 induced a concentration-dependent increase in cell adhesion and migration; both of these effects were blocked by a specific CaSR-negative allosteric modulator. These effects were mediated by integrins because they were blocked by a peptide inhibitor of integrin binding to fibronectin and ß1 knockdown experiments. An analysis of intracellular signaling pathways revealed a key role for CaSR-induced phospholipase C activation and the release of intracellular calcium. These results demonstrate for the first time that an ion-sensing G protein-coupled receptor functionally couples to the integrins and, in conjunction with intracellular calcium release, promotes cellular adhesion and migration in tumor cells. The significance of this interaction is further highlighted by studies implicating the CaSR in cancer metastasis, axonal growth, and stem cell attachment, functions that rely on integrin-mediated cell adhesion.


Asunto(s)
Movimiento Celular , Integrinas/metabolismo , Receptores Sensibles al Calcio/metabolismo , Regulación Alostérica/efectos de los fármacos , Compuestos de Anilina/farmacología , Animales , Calcio/metabolismo , Adhesión Celular/efectos de los fármacos , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Fibronectinas/metabolismo , Regulación de la Expresión Génica/efectos de los fármacos , Humanos , Cadenas beta de Integrinas/metabolismo , Espacio Intracelular/efectos de los fármacos , Espacio Intracelular/metabolismo , Oligopéptidos/farmacología , Fenetilaminas , Propilaminas , Transporte de Proteínas/efectos de los fármacos , Ratas , Receptores Sensibles al Calcio/química , Transducción de Señal/efectos de los fármacos
8.
Sci Rep ; 12(1): 3072, 2022 02 23.
Artículo en Inglés | MEDLINE | ID: mdl-35197512

RESUMEN

The post-treatment status of breast cancer survivors has become a concern because of the toxicity induced by chemotherapeutic agents in the brain tissues resulting in cognitive deficits, which is generally referred as chemobrain. The aim of this study was to assess the effect of a proprietary ayurvedic formulation Mulmina Mango against chemotherapy-induced cognitive impairment (CICI). Mammary carcinoma was induced by subcutaneously inoculating 4T1 cells into the mammary fat pad of the animals. Intraperitoneal administration of Cyclophosphamide, Methotrexate, 5-Fluorouracil (CMF) regimen was carried out once a week for three weeks. Treatment of Mulmina began one week before chemotherapy and continued till the end of the chemotherapy cycle. After three cycles of chemotherapy, cognitive decline was assessed by Morris water maze task followed by assessment of locomotor activity by open-field test. Tumor progression was evaluated by measurement of tumor volume. Oxidative and neuroinflammatory markers were also evaluated from the isolated brain samples. CMF treatment resulted in a considerable reduction in tumour volume. We found chemotherapy negatively affected behavioral and biochemical parameters in animals and Mulmina treatment ameliorated these cognitive impairments by restoring antioxidant and maintaining cytokine levels. The combination of phytochemicals in Mulmina proved its possible ability to alleviate CICI without affecting chemotherapeutic efficiency and could pave the way for identifying treatment strategies to combat chemobrain.


Asunto(s)
Antineoplásicos/efectos adversos , Neoplasias de la Mama/tratamiento farmacológico , Disfunción Cognitiva/inducido químicamente , Disfunción Cognitiva/prevención & control , Mangifera/química , Medicina Ayurvédica , Fitoquímicos/administración & dosificación , Fitoterapia , Extractos Vegetales/administración & dosificación , Animales , Antioxidantes/metabolismo , Disfunción Cognitiva/diagnóstico , Citocinas/metabolismo , Modelos Animales de Enfermedad , Femenino , Ratones , Fitoquímicos/farmacología , Extractos Vegetales/farmacología
9.
J Clin Transl Sci ; 6(1): e109, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36285015

RESUMEN

Community engagement (CE) is critical for advancing health equity and a key approach for promoting inclusive clinical and translational science. However, it requires a workforce trained to effectively design, implement, and evaluate health promotion and improvement strategies through meaningful collaboration with community members. This paper presents an approach for designing CE curricula for research, education, clinical care, and public health learners. A general pedagogical framework is presented to support curriculum development with the inclusion of community members as facilitators or faculty. The overall goal of the curriculum is envisioned as enabling learners to effectively demonstrate the principles of CE in working with community members on issues of concern to communities to promote health and well-being. We highlight transformations needed for the commonly used critical service-learning model and the importance of faculty well-versed in CE. Courses may include didactics and practicums with well-defined objectives and evaluation components. Because of the importance of building and maintaining relationships in CE, a preparatory phase is recommended prior to experiential learning, which should be guided and designed to include debriefing and reflective learning. Depending on the scope of the course, evaluation should include community perspectives on the experience.

10.
J Biol Chem ; 285(9): 6538-51, 2010 Feb 26.
Artículo en Inglés | MEDLINE | ID: mdl-20048162

RESUMEN

The activation of several G protein-coupled receptors is known to regulate the adhesive properties of cells in different contexts. Here, we reveal that Gbetagamma subunits of heterotrimeric G proteins regulate cell-matrix adhesiveness by activating Rap1a-dependent inside-out signals and integrin activation. We show that Gbetagamma subunits enter in a protein complex with activated Rap1a and its effector Radil and establish that this complex is required downstream of receptor stimulation for the activation of integrins and the positive modulation of cell-matrix adhesiveness. Moreover, we demonstrate that Gbetagamma and activated Rap1a promote the translocation of Radil to the plasma membrane at sites of cell-matrix contacts. These results add to the molecular understanding of how G protein-coupled receptors impinge on cell adhesion and suggest that the Gbetagamma x Rap1 x Radil complex plays important roles in this process.


Asunto(s)
Proteínas Portadoras/metabolismo , Subunidades beta de la Proteína de Unión al GTP/fisiología , Subunidades gamma de la Proteína de Unión al GTP/fisiología , Proteínas de Unión al GTP rap1/metabolismo , Adhesión Celular , Línea Celular , Matriz Extracelular/metabolismo , Humanos , Integrinas/metabolismo , Complejos Multiproteicos/metabolismo , Proteínas del Tejido Nervioso , Transporte de Proteínas
11.
Malar J ; 10: 357, 2011 Dec 13.
Artículo en Inglés | MEDLINE | ID: mdl-22165959

RESUMEN

BACKGROUND: BRAC, an indigenous non-governmental development organization (NGO), has been implementing a programme to prevent and control malaria in the 13 malaria-endemic districts of Bangladesh since 2007. One of the critical preventive interventions is the distribution of insecticidal bed nets (long-lasting insecticide-treated nets, LLINs and insecticide-treated ordinary nets, ITNs) to the community free of cost. This study aimed to assess progress in the possession, preferential use, and knowledge on use of the LLIN/ITNs including the programme's avowed pro-poor inclination one and three and half years after intervention began. METHODS: A convenient sampling strategy based on malaria endemicity in the districts was adopted. First, thirty upazila (sub-district, with a population around 250,000)s were selected at random, with high prevalent districts contributing more upazilas; second, from each upazila, one (2008) to two (2011) villages (covered by insecticidal bed net distribution programme) were selected. From each village, households that had either one under-five child and/or a pregnant woman were included in the survey, one household being included only once. Data were collected using a pre-tested structured questionnaire. RESULTS: In all, 3,760 households in 2008 and 7,895 households in 2011 were surveyed for collecting relevant information. Proportion of households with at least one LLIN, and at least one LLIN/ITN increased (22-59 to 62-67% and 22-64% to 74-76% respectively) over time, including increase in the mean number of LLIN/ITNs per household (≤ 1 to 1 +). The programme achieved > 80% coverage in sleeping under an LLIN/ITN in the case of under-five children and pregnant women, especially in the high-endemic districts. Knowledge regarding critical time of hanging the net also increased over time (7-22 to 44-54%), but remained low. The pro-poor inclination of the programme is reflected in the status of relevant indicators according to self-rated poverty status of the households. CONCLUSIONS: There has been a substantial improvement in possession and usage of insecticidal bed nets especially for the two most vulnerable groups (under-five children and pregnant women), including a reduction of gaps between the high and low endemic districts, and the deficit and non-deficit households during the study period.


Asunto(s)
Composición Familiar , Investigación sobre Servicios de Salud , Mosquiteros Tratados con Insecticida/provisión & distribución , Mosquiteros Tratados con Insecticida/estadística & datos numéricos , Malaria/epidemiología , Malaria/prevención & control , Bangladesh/epidemiología , Preescolar , Estudios Transversales , Femenino , Humanos , Lactante , Recién Nacido , Mosquiteros Tratados con Insecticida/economía , Embarazo
12.
BMC Pregnancy Childbirth ; 11: 15, 2011 Mar 01.
Artículo en Inglés | MEDLINE | ID: mdl-21362164

RESUMEN

BACKGROUND: Although many studies have been carried out to learn about maternal care practices in rural areas and urban-slums of Bangladesh, none have focused on ultra poor women. Understanding the context in which women would be willing to accept new practices is essential for developing realistic and relevant behaviour change messages. This study sought to fill in this knowledge gap by exploring maternal care practices among women who participated in a grant-based livelihood programme for the ultra poor. This is expected to assist the designing of the health education messages programme in an effort to improve maternal morbidity and survival towards achieving the UN millennium Development Goal 5. METHODS: Qualitative method was used to collect data on maternal care practices during pregnancy, delivery, and post-partum period from women in ultra poor households. The sample included both currently pregnant women who have had a previous childbirth, and lactating women, participating in a grant-based livelihood development programme. Rangpur and Kurigram districts in northern Bangladesh were selected for data collection. RESULTS: Women usually considered pregnancy as a normal event unless complications arose, and most of them refrained from seeking antenatal care (ANC) except for confirmation of pregnancy, and no prior preparation for childbirth was taken. Financial constraints, coupled with traditional beliefs and rituals, delayed care-seeking in cases where complications arose. Delivery usually took place on the floor in the squatting posture and the attendants did not always follow antiseptic measures such as washing hands before conducting delivery. Following the birth of the baby, attention was mainly focused on the expulsion of the placenta and various maneuvres were adapted to hasten the process, which were sometimes harmful. There were multiple food-related taboos and restrictions, which decreased the consumption of protein during pregnancy and post-partum period. Women usually failed to go to the healthcare providers for illnesses in the post-partum period. CONCLUSION: This study shows that cultural beliefs and norms have a strong influence on maternal care practices among the ultra poor households, and override the beneficial economic effects from livelihood support intervention. Some of these practices, often compromised by various taboos and beliefs, may become harmful at times. Health behavior education in this livelihood support program can be carefully tailored to local cultural beliefs to achieve better maternal outcomes.


Asunto(s)
Conocimientos, Actitudes y Práctica en Salud , Aceptación de la Atención de Salud/etnología , Pobreza , Atención Prenatal , Población Rural , Adulto , Actitud del Personal de Salud , Bangladesh , Dieta , Suplementos Dietéticos , Femenino , Humanos , Hierro , Trabajo de Parto , Conducta Materna/etnología , Atención Posnatal , Embarazo , Investigación Cualitativa , Adulto Joven
13.
WMJ ; 110(3): 119-26, 2011 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-21748996

RESUMEN

BACKGROUND: The Strong Rural Communities Initiative (SRCI) was created to address the health needs of rural Wisconsin communities through a multifaceted partnership that included the Medical College of Wisconsin (MCW), University of Wisconsin School of Medicine and Public Health (UWSMPH), the Rural Health Development Council (RHDC), and hospitals, public health departments, and businesses in 6 rural communities in Wisconsin. The SRCI provided a broad framework of leadership to assist each of the 6 rural communities in developing and implementing new, collaborative interventions that addressed the specific health needs of the community. METHODS: Separate assessments were conducted for the communities that partnered with each respective medical school and focused on the processes of community collaboration and partnership function. Assessment approaches included formative and outcome evaluation. RESULTS: Each community independently reported positive outcomes associated with the partnership process and various aspects of community collaboration, including the successes and health impacts of the workplace wellness programs implemented. Assessment data also revealed challenges related to conducting effective community-academic partnerships. CONCLUSIONS: The SRCI was established to execute statewide programs in rural communities with the goal to improve the health of people living in those communities. We have gained applicable knowledge regarding the types of challenges that exist in establishing a rural-based community research network between academic partners and community leaders.


Asunto(s)
Relaciones Comunidad-Institución , Promoción de la Salud/organización & administración , Estilo de Vida , Servicios de Salud Rural/organización & administración , Comercio , Conducta Cooperativa , Necesidades y Demandas de Servicios de Salud , Hospitales Rurales , Humanos , Administración en Salud Pública , Facultades de Medicina , Wisconsin
14.
J Trauma Acute Care Surg ; 91(1): 108-113, 2021 07 01.
Artículo en Inglés | MEDLINE | ID: mdl-33605694

RESUMEN

BACKGROUND: Neuroinflammation and cerebral edema development following severe traumatic brain injury (TBI) affect subsequent cognitive recovery. Independent of its anticoagulant effects, antithrombin III (AT-III) has been shown to block neurovascular inflammation after severe TBI, reduce cerebral endothelial-leukocyte interactions, and decrease blood-brain barrier permeability. We hypothesized that AT-III administration after TBI would improve post-TBI cognitive recovery, specifically enhancing learning, and memory. METHODS: Fifteen CD1 male mice were randomized to undergo severe TBI (controlled cortical impact [CCI]: velocity, 6 m/s; depth, 1 mm; diameter, 3 mm) or sham craniotomy and received either intravenous AT-III (250 IU/kg) or vehicle (VEH/saline) 15 minutes and 24 hours post-TBI. Animals underwent Morris water maze testing from 6 to 14 days postinjury consisting of cued learning trials (platform visible), spatial learning trials (platform invisible, spatial cues present), and probe (memory) trials (platform removed, spatial cues present). Intergroup differences were assessed by the Kruskal-Wallis test (p < 0.05). RESULTS: Morris water maze testing demonstrated that cumulative cued learning (overall mean time in seconds to reach the platform on days 6-8) was worst in CCI-VEH animals (26.1 ± 2.4 seconds) compared with CCI-AT-III counterparts (20.3 ± 2.1 seconds, p < 0.01). Cumulative noncued spatial learning was also worst in the CCI-VEH group (23.4 ± 1.8 seconds) but improved with AT-III (17.6 ± 1.5 seconds, p < 0.01). In probe trials, AT-III failed to significantly improve memory ability. Animals that underwent sham craniotomy demonstrated preserved learning and memory compared with all CCI counterparts (p < 0.05). CONCLUSION: Antithrombin III improves neurocognitive recovery weeks after TBI. This improvement is particularly related to improvement in learning but not memory function. Pharmacologic support of enhanced learning may support new skill acquisition or relearning to improve outcomes after TBI. LEVEL OF EVIDENCE: Therapeutic/care management, level II.


Asunto(s)
Antitrombina III/farmacología , Barrera Hematoencefálica/efectos de los fármacos , Encefalopatía Traumática Crónica/tratamiento farmacológico , Cognición/efectos de los fármacos , Prueba del Laberinto Acuático de Morris/efectos de los fármacos , Animales , Encefalopatía Traumática Crónica/sangre , Señales (Psicología) , Modelos Animales de Enfermedad , Masculino , Ratones , Distribución Aleatoria
15.
J Trauma Acute Care Surg ; 90(2): 274-280, 2021 02 01.
Artículo en Inglés | MEDLINE | ID: mdl-33093292

RESUMEN

BACKGROUND: Acute traumatic coagulopathy often accompanies traumatic brain injury (TBI) and may impair cognitive recovery. Antithrombin III (AT-III) reduces the hypercoagulability of TBI. Antithrombin III and heparinoids such as enoxaparin (ENX) demonstrate potent anti-inflammatory activity, reducing organ injury and modulating leukocyte (LEU) activation, independent of their anticoagulant effect. It is unknown what impact AT-III exerts on cerebral LEU activation and blood-brain barrier (BBB) permeability after TBI. We hypothesized that AT-III reduces live microcirculatory LEU-endothelial cell (EC) interactions and leakage at the BBB following TBI. METHODS: CD1 mice (n = 71) underwent either severe TBI (controlled cortical impact (CCI), 6-m/s velocity, 1-mm depth, and 4-mm diameter) or sham craniotomy and then received either AT-III (250 IU/kg), ENX (1.5 mg/kg), or vehicle (saline) every 24 hours. Forty-eight hours post-TBI, cerebral intravital microscopy visualized in vivo penumbral microvascular LEU-EC interactions and microvascular leakage to assess BBB inflammation/permeability. Body weight loss and the Garcia neurological test (motor, sensory, reflex, balance) served as surrogates of clinical recovery. RESULTS: Both AT-III and ENX similarly reduced in vivo penumbral LEU rolling and adhesion (p < 0.05). Antithrombin III also reduced live BBB leakage (p < 0.05). Antithrombin III animals demonstrated the least 48-hour body weight loss (8.4 ± 1%) versus controlled cortical impact and vehicle (11.4 ± 0.5%, p < 0.01). Garcia neurological test scores were similar among groups. CONCLUSION: Antithrombin III reduces post-TBI penumbral LEU-EC interactions in the BBB leading to reduced neuromicrovascular permeability. Antithrombin III further reduced body weight loss compared with no therapy. Further study is needed to determine if these AT-III effects on neuroinflammation affect longer-term neurocognitive recovery after TBI.


Asunto(s)
Antitrombina III/farmacología , Barrera Hematoencefálica/efectos de los fármacos , Hemorragia Encefálica Traumática/tratamiento farmacológico , Leucocitos/efectos de los fármacos , Animales , Hemorragia Encefálica Traumática/sangre , Ensayos de Migración de Leucocitos , Modelos Animales de Enfermedad , Enoxaparina/farmacología , Rodamiento de Leucocito/efectos de los fármacos , Masculino , Ratones
16.
J Neurosci ; 29(25): 8143-55, 2009 Jun 24.
Artículo en Inglés | MEDLINE | ID: mdl-19553454

RESUMEN

Deactivation of glutamatergic signaling in the brain is mediated by glutamate uptake into glia and neurons by glutamate transporters. Glutamate transporters are sodium-dependent proteins that putatively rely indirectly on Na,K-ATPases to generate ion gradients that drive transmitter uptake. Based on anatomical colocalization, mutual sodium dependency, and the inhibitory effects of the Na,K-ATPase inhibitor ouabain on glutamate transporter activity, we postulated that glutamate transporters are directly coupled to Na,K-ATPase and that Na,K-ATPase is an essential modulator of glutamate uptake. Na,K-ATPase was purified from rat cerebellum by tandem anion exchange and ouabain affinity chromatography, and the cohort of associated proteins was characterized by mass spectrometry. The alpha1-alpha 3 subunits of Na,K-ATPase were detected, as were the glutamate transporters GLAST and GLT-1, demonstrating that glutamate transporters copurify with Na,K-ATPases. The link between glutamate transporters and Na,K-ATPase was further established by coimmunoprecipitation and colocalization. Analysis of the regulation of glutamate transporter and Na,K-ATPase activities was assessed using [(3)H]D-aspartate, [(3)H]L-glutamate, and rubidium-86 uptake into synaptosomes and cultured astrocytes. In synaptosomes, ouabain produced a dose-dependent inhibition of glutamate transporter and Na,K-ATPase activities, whereas in astrocytes, ouabain showed a bimodal effect whereby glutamate transporter activity was stimulated at 1 microm ouabain and inhibited at higher concentrations. The effects of protein kinase inhibitors on [(3)H]D-aspartate uptake indicated the selective involvement of Src kinases, which are probably a component of the Na,K-ATPase/glutamate transporter complex. These findings demonstrate that glutamate transporters and Na,K-ATPases are part of the same macromolecular complexes and operate as a functional unit to regulate glutamatergic neurotransmission.


Asunto(s)
Astrocitos/metabolismo , Cerebelo/metabolismo , Transportador 1 de Aminoácidos Excitadores/metabolismo , Transportador 2 de Aminoácidos Excitadores/metabolismo , ATPasa Intercambiadora de Sodio-Potasio/metabolismo , Sinaptosomas/metabolismo , Sistema de Transporte de Aminoácidos X-AG/metabolismo , Animales , Ácido Aspártico/metabolismo , Western Blotting , Técnicas de Cultivo de Célula , Cerebelo/citología , Proteína Ácida Fibrilar de la Glía/metabolismo , Ácido Glutámico/metabolismo , Inmunohistoquímica , Ratas , Ratas Sprague-Dawley , Rubidio/metabolismo
17.
Am J Public Health ; 100(8): 1380-7, 2010 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-20558798

RESUMEN

Community engagement in research may enhance a community's ability to address its own health needs and health disparities issues while ensuring that researchers understand community priorities. However, there are researchers with limited understanding of and experience with effective methods of engaging communities. Furthermore, limited guidance is available for peer-review panels on evaluating proposals for research that engages communities. The National Institutes of Health Director's Council of Public Representatives developed a community engagement framework that includes values, strategies to operationalize each value, and potential outcomes of their use, as well as a peer-review framework for evaluating research that engages communities. Use of these frameworks for educating researchers to create and sustain authentic community-academic partnerships will increase accountability and equality between the partners.


Asunto(s)
Investigación Participativa Basada en la Comunidad/organización & administración , Revisión de la Investigación por Pares , Investigadores , Comités Consultivos , Comunicación , Participación de la Comunidad , Relaciones Comunidad-Institución , Conducta Cooperativa , Guías como Asunto , Necesidades y Demandas de Servicios de Salud , Humanos , Modelos Educacionales , National Institutes of Health (U.S.) , Revisión de la Investigación por Pares/métodos , Revisión de la Investigación por Pares/normas , Poder Psicológico , Rol Profesional , Desarrollo de Programa , Proyectos de Investigación/normas , Investigadores/educación , Investigadores/organización & administración , Apoyo a la Investigación como Asunto , Estados Unidos
18.
Compr Ther ; 36: 20-2, 2010.
Artículo en Inglés | MEDLINE | ID: mdl-21229816

RESUMEN

Antiplatelet therapy has an essential role in the treatment of cardiovascular disease. In this article, we discuss the characteristics of current, new and emerging antiplatelet drugs, their mechanisms of action, and their role in the primary and secondary prevention of cardiovascular disease.


Asunto(s)
Enfermedades Cardiovasculares/prevención & control , Inhibidores de Agregación Plaquetaria/uso terapéutico , Tienopiridinas/uso terapéutico , Ensayos Clínicos como Asunto , Humanos , Inhibidores de Agregación Plaquetaria/administración & dosificación , Inhibidores de Agregación Plaquetaria/efectos adversos , Tienopiridinas/administración & dosificación , Tienopiridinas/efectos adversos
19.
Indian J Anaesth ; 64(Suppl 2): S91-S96, 2020 May.
Artículo en Inglés | MEDLINE | ID: mdl-32773845

RESUMEN

Management of the recent outbreak of the novel coronavirus disease (COVID-19) caused by the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) remains challenging. The challenges are not only limited to its preventive strategies, but also extend to curative treatment, and are amplified during the management of critically ill patients with COVID-19. Older persons with comorbidities like diabetes mellitus, cardiac diseases, hepatic impairment, renal disorders and respiratory pathologies or immune impairing conditions are more vulnerable and have a higher mortality from COVID-19. Earlier, the Indian Resuscitation Council (IRC) had proposed the Comprehensive Cardiopulmonary Life Support (CCLS) for management of cardiac arrest victims in the hospital setting. However, in patients with COVID-19, the guidelines need to be modified,due to various concerns like differing etiology of cardiac arrest, virulence of the virus, risk of its transmission to rescuers, and the need to avoid or minimize aerosolization from the patient due to various interventions. There is limited evidence in these patients, as the SARS-CoV-2 is a novel infection and not much literature is available with high-level evidence related to CPR in patients of COVID-19. These suggested guidelines are a continuum of CCLS guidelines by IRC with an emphasis on the various challenges and concerns being faced during the resuscitative management of COVID-19 patients with cardiopulmonary arrest.

20.
ScientificWorldJournal ; 9: 1346-7, 2009 Dec 16.
Artículo en Inglés | MEDLINE | ID: mdl-20024508

RESUMEN

This image illustrates a horseshoe kidney from an elderly man that was being evaluated for chronic kidney disease associated with diabetes. Horseshoe kidney is the most common renal fusion abnormality, with an incidence of 1/400 worldwide and a male-to-female ratio of 2:1 and is not a cause of impaired kidney function. One theory of the abnormal fusion of the kidneys is that the metanephric blastemas close together before renal capsule maturation, resulting in fusion. The normal embryonic ascent of the fused kidney is disrupted by the inferior mesenteric artery, leaving the adult horseshoe kidney in a lower position than normal. About 90% of the time, the lower poles are fused and the excretory renal units and ureters are maintained separately.


Asunto(s)
Fallo Renal Crónico/complicaciones , Riñón/anomalías , Anciano de 80 o más Años , Humanos , Riñón/patología , Fallo Renal Crónico/patología , Masculino , Tomografía Computarizada por Rayos X
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