Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 34
Filtrar
1.
J Am Pharm Assoc (2003) ; 59(4S): S57-S61, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31126831

RESUMEN

OBJECTIVES: To explore how pharmacy interns' training experiences during internship influence understanding and confidence about preparation for providing patient care services in a large community pharmacy chain. METHODS: A descriptive survey design using a census sample of the 98 pharmacy interns, aged 18 years and older, employed in 52 pharmacies of one community pharmacy chain was conducted. Training experiences influencing understanding and confidence were evaluated with the use of a 38-question survey instrument developed with a focus group of pharmacy interns and distributed via Qualtrics over a period of 12 weeks. Responses were stored in Qualtrics and analyzed with the use of SAS version 9.4. RESULTS: Thirty-four surveys were returned, for a response rate of 35%, with a 20% response rate for all of the questions. Pharmacy interns who completed the American Pharmacist Association "Delivering Medication Therapy Management Services" certificate training program were more likely to agree with statements evaluating understanding (P < 0.02) and confidence (P < 0.09) in completing a comprehensive medication review and less likely to indicate a need for training (P < 0.02). Pharmacy interns have a greater understanding and confidence incorporating immunizations into workflow (both 85%). They also have a greater understanding and confidence in using Advisory Committee on Immunization Practices/Centers for Disease Control and Prevention guidelines for immunization recommendations (90% and 85%, respectively). Pharmacy interns reported that they did not have a strong understanding of and confidence level in providing other patient care services, including medication therapy management services, clinical queue, and point-of-care testing. Survey respondents reported a desire for additional training in these areas. CONCLUSION: Although pharmacy interns have a greater understanding of how to incorporate immunizations into pharmacy workload and use immunization guidelines, levels of understanding and confidence in providing other patient care services were not as strong. Future development of training for patient care services may help to increase pharmacy intern understanding and confidence.


Asunto(s)
Atención a la Salud/estadística & datos numéricos , Residencias en Farmacia/estadística & datos numéricos , Rol Profesional/psicología , Adulto , Femenino , Conocimientos, Actitudes y Práctica en Salud , Humanos , Masculino , Administración del Tratamiento Farmacológico/estadística & datos numéricos , Atención al Paciente/psicología , Atención al Paciente/estadística & datos numéricos , Farmacias/estadística & datos numéricos , Farmacéuticos/estadística & datos numéricos , Encuestas y Cuestionarios , Carga de Trabajo/psicología , Carga de Trabajo/estadística & datos numéricos
2.
Int J Geriatr Psychiatry ; 31(10): 1097-104, 2016 10.
Artículo en Inglés | MEDLINE | ID: mdl-27442187

RESUMEN

OBJECTIVE: To explore middle-aged and older veterans' current disease-management practices, mental health treatment preferences, and challenges of living with multiple chronic health conditions (i.e., multimorbidity). METHODS: Semi-structured qualitative interviews and self-report measures were collected from 28 middle-aged and older (50 years of age or older) veterans with multimorbidity. RESULTS: Our sample of veterans with multimorbidity was, on average, mildly depressed and anxious with elevated stress and disability. Veterans acknowledged the interaction of physical and emotional symptoms, which caused greater difficulty with health care management and daily functioning. Veterans had many concerns regarding their physical and emotional health conditions, such as continued disease progression and the addition of other emotional and physical health complications. Veterans also identified specific self-care approaches for disease management (e.g., medication, healthy lifestyle practices, and psychological stress management techniques), as well as barriers to engaging in care (e.g., money, transportation, and stigma). Participants preferred a combination of medication, psychotherapy, and healthy lifestyle practices for mental health treatment. The majority of participants (88.5%) agreed that these mental health treatments would be beneficial to integrate into disease management for older veterans with multimorbidity. Lastly, veterans provided an array of recommendations for improving Veteran's Administration services and reducing mental health stigma. CONCLUSIONS: These findings provide support for patient-centered approaches and integrated mental and physical health self-management in the Veteran's Administration for middle-aged and older veterans with multiple chronic conditions. Copyright © 2016 John Wiley & Sons, Ltd.


Asunto(s)
Trastornos Mentales/terapia , Servicios de Salud Mental , Multimorbilidad , Veteranos , Anciano , Prestación Integrada de Atención de Salud , Manejo de la Enfermedad , Femenino , Accesibilidad a los Servicios de Salud/normas , Humanos , Masculino , Persona de Mediana Edad , Evaluación de Necesidades , Prioridad del Paciente , Atención Dirigida al Paciente , Investigación Cualitativa , Autocuidado/métodos , Estigma Social
3.
Org Biomol Chem ; 11(7): 1179-98, 2013 Feb 21.
Artículo en Inglés | MEDLINE | ID: mdl-23314908

RESUMEN

Toll-like receptor (TLR)-8 agonists typified by the 2-alkylthiazolo[4,5-c]quinolin-4-amine (CL075) chemotype are uniquely potent in activating adaptive immune responses by inducing robust production of T helper 1-polarizing cytokines, suggesting that TLR8-active compounds could be promising candidate vaccine adjuvants, especially for neonatal vaccines. Alkylthiazoloquinolines with methyl, ethyl, propyl and butyl groups at C2 displayed comparable TLR8-agonistic potencies; activity diminished precipitously in the C2-pentyl compound, and higher homologues were inactive. The C2-butyl compound was unique in possessing substantial TLR7-agonistic activity. Analogues with branched alkyl groups at C2 displayed poor tolerance of terminal steric bulk. Virtually all modifications at C8 led to abrogation of agonistic activity. Alkylation on the C4-amine was not tolerated, whereas N-acyl analogues with short acyl groups (other than acetyl) retained TLR8 agonistic activity, but were substantially less water-soluble. Immunization in rabbits with a model subunit antigen adjuvanted with the lead C2-butyl thiazoloquinoline showed enhancements of antigen-specific antibody titers.


Asunto(s)
Quinolinas/farmacología , Tiazoles/farmacología , Receptor Toll-Like 8/agonistas , Relación Dosis-Respuesta a Droga , Humanos , Estructura Molecular , Quinolinas/síntesis química , Quinolinas/química , Relación Estructura-Actividad , Tiazoles/síntesis química , Tiazoles/química
4.
Org Biomol Chem ; 11(38): 6526-45, 2013 Oct 14.
Artículo en Inglés | MEDLINE | ID: mdl-23974333

RESUMEN

Engagement of TLR7 in plasmacytoid dendritic cells leads to the induction of IFN-α/ß which plays essential functions in the control of adaptive immunity. We had previously examined structure-activity relationships (SAR) in TLR7/8-agonistic imidazoquinolines with a focus on substituents at the N(1), C(2), N(3) and N(4) positions, and we now report SAR on 1H-imidazo[4,5-c]pyridines. 1-Benzyl-2-butyl-1H-imidazo[4,5-c]pyridin-4-amine was found to be a pure TLR7-agonist with negligible activity on TLR8. Increase in potency was observed in N(6)-substituted analogues, especially in those compounds with electron-rich substituents. Direct aryl-aryl connections at C6 abrogated activity, but TLR7 agonism was reinstated in 6-benzyl and 6-phenethyl analogues. Consistent with the pure TLR7-agonistic behavior, prominent IFN-α induction in human PBMCs was observed with minimal proinflammatory cytokine induction. A benzologue of imidazoquinoline was also synthesized which showed substantial improvements in potency over the parent imidazopyridine. Distinct differences in N(6)-substituted analogues were observed with respect to IFN-α induction in human PBMCs on the one hand, and CD69 upregulation in lymphocytic subsets, on the other.


Asunto(s)
Imidazoles/farmacología , Piridinas/farmacología , Receptor Toll-Like 7/agonistas , Citocinas/análisis , Células HEK293 , Humanos , Imidazoles/síntesis química , Imidazoles/química , Inmunoensayo , Interferón-alfa/análisis , Leucocitos Mononucleares/metabolismo , Piridinas/síntesis química , Piridinas/química , Relación Estructura-Actividad , Receptor Toll-Like 7/genética
5.
Respir Med ; 219: 107430, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37890639

RESUMEN

Many inhaler devices are currently used in clinical practice to deliver medication, with each inhaler device offering different benefits to overcome technique issues. Inhaler technique remains poor, contributing to reduced airway drug deposition and consequently poor disease control. Scoring inhaler technique has been used within research as an outcome measure of inhaler technique assessment, and this systematic review collates and evaluates these scoring methods. The review protocol was prospectively registered in PROSPERO (CRD42020218869). A total of 172 articles were screened with 77 included, and the results presented using narrative synthesis due to the heterogeneity of the study design and data. The most frequently used scoring method awarded one point per step in the inhaler technique checklist and was included in 59/77 (77%) of articles; however limited and varied guidance was provided for score interpretation. Other inhaler technique scoring methods included grading the final inhaler technique score, expressing the total score as a percentage/ratio, deducting points from the final score when errors were made, and weighting steps within the checklist depending on how crucial the step was. Vast heterogeneity in the number of steps and content in the inhaler technique checklists was observed across all device types (range 5-19 steps). Only 4/77 (5%) of the inhaler technique measures had undertaken fundamental steps required in the scale development process for use in real world practice. This review demonstrates the demand for a tool that measures inhaler technique and highlights the current unmet need for one that has undergone validation.


Asunto(s)
Enfermedad Pulmonar Obstructiva Crónica , Proyectos de Investigación , Humanos , Administración por Inhalación , Nebulizadores y Vaporizadores , Lista de Verificación , Enfermedad Pulmonar Obstructiva Crónica/tratamiento farmacológico
6.
J Infect ; 87(1): 18-26, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-37085049

RESUMEN

BACKGROUND: COV-BOOST is a multicentre, randomised, controlled, phase 2 trial of seven COVID-19 vaccines used as a third booster dose in June 2021. Monovalent messenger RNA (mRNA) COVID-19 vaccines were subsequently widely used for the third and fourth-dose vaccination campaigns in high-income countries. Real-world vaccine effectiveness against symptomatic infections following third doses declined during the Omicron wave. This report compares the immunogenicity and kinetics of responses to third doses of vaccines from day (D) 28 to D242 following third doses in seven study arms. METHODS: The trial initially included ten experimental vaccine arms (seven full-dose, three half-dose) delivered at three groups of six sites. Participants in each site group were randomised to three or four experimental vaccines, or MenACWY control. The trial was stratified such that half of participants had previously received two primary doses of ChAdOx1 nCov-19 (Oxford-AstraZeneca; hereafter referred to as ChAd) and half had received two doses of BNT162b2 (Pfizer-BioNtech, hereafter referred to as BNT). The D242 follow-up was done in seven arms (five full-dose, two half-dose). The BNT vaccine was used as the reference as it was the most commonly deployed third-dose vaccine in clinical practice in high-income countries. The primary analysis was conducted using all randomised and baseline seronegative participants who were SARS-CoV-2 naïve during the study and who had not received a further COVID-19 vaccine for any reason since third dose randomisation. RESULTS: Among the 817 participants included in this report, the median age was 72 years (IQR: 55-78) with 50.7% being female. The decay rates of anti-spike IgG between vaccines are different among both populations who received initial doses of ChAd/ChAd and BNT/BNT. In the population that previously received ChAd/ChAd, mRNA vaccines had the highest titre at D242 following their vaccine dose although Ad26. COV2. S (Janssen; hereafter referred to as Ad26) showed slower decay. For people who received BNT/BNT as their initial doses, a slower decay was also seen in the Ad26 and ChAd arms. The anti-spike IgG became significantly higher in the Ad26 arm compared to the BNT arm as early as 3 months following vaccination. Similar decay rates were seen between BNT and half-BNT; the geometric mean ratios ranged from 0.76 to 0.94 at different time points. The difference in decay rates between vaccines was similar for wild-type live virus-neutralising antibodies and that seen for anti-spike IgG. For cellular responses, the persistence was similar between study arms. CONCLUSIONS: Heterologous third doses with viral vector vaccines following two doses of mRNA achieve more durable humoral responses compared with three doses of mRNA vaccines. Lower doses of mRNA vaccines could be considered for future booster campaigns.


Asunto(s)
COVID-19 , Vacunas Virales , Femenino , Humanos , Anciano , Masculino , Vacunas contra la COVID-19 , Vacuna BNT162 , ChAdOx1 nCoV-19 , COVID-19/prevención & control , SARS-CoV-2 , Inmunidad , Reino Unido , Inmunoglobulina G , Anticuerpos Antivirales , Vacunación , Inmunogenicidad Vacunal
7.
NPJ Prim Care Respir Med ; 32(1): 51, 2022 11 11.
Artículo en Inglés | MEDLINE | ID: mdl-36369507

RESUMEN

Supporting self-management is key in improving disease control, with technology increasingly utilised. We hypothesised the addition of telehealth support following assessment in an integrated respiratory clinic could reduce unscheduled healthcare visits in patients with asthma and COPD. Following treatment optimisation, exacerbation-prone participants or those with difficulty in self-management were offered telehealth support. This comprised automated twice-weekly telephone calls, with a specialist nurse triaging alerts. We performed a matched cohort study assessing additional benefits of the telehealth service, matching by: confirmed diagnosis, age, sex, FEV1 percent predicted, smoking status and ≥1 exacerbation in the last year. Thirty-four telehealth participants were matched to twenty-nine control participants. The telehealth cohort generated 165 alerts, with 29 participants raising at least one alert; 88 (53.5%) alerts received a call discussing self-management, of which 35 (21%) received definitive advice that may otherwise have required an unscheduled healthcare visit. There was a greater reduction in median exacerbation rate across both telehealth groups at 6 months post-intervention (1 to 0, p < 0.001) but not in control groups (0.5 to 0.0, p = 0.121). Similarly, there was a significant reduction in unscheduled GP visits across the telehealth groups (1.5 to 0.0, p < 0.001), but not the control groups (0.5 to 0.0, p = 0.115). These reductions led to cost-savings across all groups, but greater in the telehealth cohorts. The addition of telehealth support to exacerbation-prone patients with asthma or COPD, following comprehensive assessment and treatment optimisation, proved beneficial in reducing exacerbation frequency and unscheduled healthcare visits and thus leads to significant cost-savings for the NHS.Clinical Trial Registration: ClinicalTrials.gov: NCT03096509.


Asunto(s)
Asma , Enfermedad Pulmonar Obstructiva Crónica , Automanejo , Telemedicina , Humanos , Estudios de Cohortes , Asma/tratamiento farmacológico , Enfermedad Pulmonar Obstructiva Crónica/terapia
8.
Artículo en Inglés | MEDLINE | ID: mdl-34281036

RESUMEN

A large university in Queensland, Australia with a diverse staff and student community introduced a campus wide smoke-free policy in 2016. The purpose of this enquiry was to understand attitudes about a new smoke-free policy, its potential impact and the shift in social norms and organizational culture to inform the next phase of implementation. An electronic survey was distributed to all staff and students approximately 12 weeks after the smoke-free policy was implemented. The survey consisted of multiple-choice questions about demographics, smoking behaviour, attitudes towards smoking and tobacco control, awareness of the smoke-free policy, and attitudes towards the effect of a completely smoke-free campus on quality of life, learning and enrolment. The survey was completed by 641 university staff and students. Respondents reported seeking out (80.4%) and socialising in smoke-free environments (86.6%) and supported smoke-free buildings (96.1%), indoor areas (91.6%), and outdoor areas (79%). The results revealed overwhelming support for a completely smoke-free campus (83%) and minority support for designated smoking areas (31%). Overall, respondents reflected positively towards a campus wide smoke-free policy. These findings suggest Queensland's early adoption of tobacco control laws influenced the social environment, de-normalised smoking, changed behaviour, preference for smoke-free environments and shifted social norms. These findings provide convincing evidence for organisational change and suggest health promotion policy makers should progress the implementation of smoke-free policies nationally across the higher education sector.


Asunto(s)
Política para Fumadores , Contaminación por Humo de Tabaco , Actitud Frente a la Salud , Australia , Promoción de la Salud , Humanos , Cultura Organizacional , Calidad de Vida , Queensland , Prevención del Hábito de Fumar , Normas Sociales , Estudiantes , Universidades
9.
Artículo en Inglés | MEDLINE | ID: mdl-33844478

RESUMEN

Reservation communities are among emerging communities for gang activity, in which reports of a rise in youth and/or criminal gangs began occurring after the 1980s. Gang membership has been found to pose a public health risk, strain community resources, and risk a number of individual negative life outcomes. Perceived increases in reservation gang activity have been observed by law-enforcement and community stakeholders, but comparatively little empirical research has focused specifically on these communities. Utilizing data from an existing public dataset, analysis of variance and regression analysis were utilized to examine cross sectional trends in gang involvement among 14,457 American Indian adolescents in reservation communities between 1993-2013. Results of this study failed to establish a consistent pattern of either growth or decline in gang membership across time when examining all reservations communities, with data suggesting that consistent trends may exist only within specific communities. Gang members were found to endorse significantly more alcohol and marijuana use, anger, depressed mood, and victimization as a whole. Only alcohol and marijuana use, violent behavior, and depressed mood demonstrated a significant interaction with time and gang membership. Finally, self-reported substance use, criminal behavior/delinquency, and violence perpetration significantly increased as gang affiliation increased.


Asunto(s)
Indígenas Norteamericanos , Delincuencia Juvenil , Adolescente , Estudios Transversales , Humanos , Factores de Riesgo , Indio Americano o Nativo de Alaska
10.
JMIR Res Protoc ; 10(7): e23831, 2021 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-34255725

RESUMEN

BACKGROUND: More than 7% of the world's population is living with a chronic respiratory condition. In the United Kingdom, lung disease affects approximately 1 in 5 people, resulting in over 700,000 hospital admissions each year. People with respiratory conditions have several symptoms and can require multiple health care visits and investigations before a diagnosis is made. The tests available can be difficult to perform, especially if a person is symptomatic, leading to poor quality results. A new, easy-to-perform, point-of-care test that can be performed in any health care setting and that can differentiate between various respiratory conditions would have a significant, beneficial impact on the ability to diagnose respiratory diseases. OBJECTIVE: The objective of this study is to use a new handheld device (Inflammacheck) in different respiratory conditions to measure the exhaled breath condensate hydrogen peroxide (EBC H2O2) and compare these results with those of healthy controls and with each other. This study also aims to determine whether the device can measure other parameters, including breath humidity, breath temperature, breath flow dynamics, and end tidal carbon dioxide. METHODS: We will perform a single-visit, cross-sectional observational study of EBC H2O2 levels, as measured by Inflammacheck, in people with respiratory disease and volunteers with no known lung disease. Participants with a confirmed diagnosis of asthma, chronic obstructive pulmonary disease, lung cancer, bronchiectasis, pneumonia, breathing pattern disorder, and interstitial lung disease as well as volunteers with no history of lung disease will be asked to breathe into the Inflammacheck device to record their breath sample. RESULTS: The results from this study will be available in 2022, in anticipation of COVID-19-related delays. CONCLUSIONS: This study will investigate the EBC H2O2, as well as other exhaled breath parameters, for use as a future diagnostic tool.

11.
JMIR Res Protoc ; 10(8): e26350, 2021 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-34448728

RESUMEN

BACKGROUND: It is a recurring theme in clinical practice that patients using inhaled medications via an inhaler do not use their device to a standard that allows for optimum therapeutic effect, and some studies have shown that up to 90% of people do not use their inhalers properly. Observation and correction of the inhaler technique by health care professionals is advised by both national and international guidelines and should be performed at every opportunity to ensure that the optimum inhaler technique is achieved by the user. This study will provide a greater understanding of the most frequent technique errors made by people using 13 different inhaler types. OBJECTIVE: This study aims to identify and compare inhaler technique errors and their prevalence in adults, using device-specific checklists in accordance with manufacturers' guidelines, for 13 specific inhaler types across all lung conditions and to correlate these errors with possible determinants of poor technique. It also aims to assess the error frequency at each step in the device-specific questionnaires and compare the error rates among device types. METHODS: In a single visit, participants using an inhaler included in the inclusion criteria will have their inhaler technique observed using an identical placebo device, which will be recorded using device-specific checklists, and technique-optimized, or switched to a suitable inhaler. RESULTS: The study is already underway, and it is anticipated that the results will be available by 2022. CONCLUSIONS: The SCORES (Study to Investigate the Prevalence of Device-Specific Errors in Inhaler Technique in Adults With Airway Disease) study will ascertain the prevalence of device-specific inhaler technique errors at each step in the device-specific checklists, compare error rates among 13 device types, and correlate these errors with possible determinants of poor technique. Future work will involve the clarification and classification of these errors into critical and noncritical categories. TRIAL REGISTRATION: ClinicalTrials.gov NCT04262271; https://clinicaltrials.gov/ct2/show/NCT04262271. INTERNATIONAL REGISTERED REPORT IDENTIFIER (IRRID): DERR1-10.2196/26350.

12.
Clin Cancer Res ; 27(4): 1200-1213, 2021 02 15.
Artículo en Inglés | MEDLINE | ID: mdl-33203643

RESUMEN

PURPOSE: Receptor-interacting protein kinase 3 (RIPK3) phosphorylates effector molecule MLKL to trigger necroptosis. Although RIPK3 loss is seen in several human cancers, its role in malignant mesothelioma is unknown. This study aimed to determine whether RIPK3 functions as a potential tumor suppressor to limit development of malignant mesothelioma. EXPERIMENTAL DESIGN: RIPK3 expression was examined in 66 malignant mesothelioma tumors and cell lines. Promoter methylation and DNMT1 siRNA studies were performed to assess the mode of RIPK3 silencing in RIPK3-deficient malignant mesothelioma cells. Restoration of RIPK3 expression in RIPK3-negative malignant mesothelioma cells, either by treatment with 5-aza-2'-deoxycytidine or lentiviral expression of cDNA, was performed to assess effects on cell viability, necrosis, and chemosensitization. RESULTS: Loss of RIPK3 expression was observed in 42/66 (63%) primary malignant mesotheliomas and malignant mesothelioma cell lines, and RT-PCR analysis demonstrated that downregulation occurs at the transcriptional level, consistent with epigenetic silencing. RIPK3-negative malignant mesothelioma cells treated with 5-aza-2'-deoxycytidine resulted in reexpression of RIPK3 and chemosensitization. Ectopic expression of RIPK3 also resulted in chemosensitization and led to necroptosis, the latter demonstrated by phosphorylation of downstream target MLKL and confirmed by rescue experiments. Mining of RIPK3 expression and survival outcomes among patients with malignant mesothelioma available from The Cancer Genome Atlas repository revealed that promoter methylation of RIPK3 is associated with reduced RIPK3 expression and poor prognosis. CONCLUSIONS: These data suggest that RIPK3 acts as a tumor suppressor in malignant mesothelioma by triggering necroptosis and that epigenetic silencing of RIPK3 by DNA methylation impairs necroptosis and contributes to chemoresistance and poor survival in this incurable disease.


Asunto(s)
Resistencia a Antineoplásicos/genética , Epigénesis Genética , Mesotelioma Maligno/tratamiento farmacológico , Proteína Serina-Treonina Quinasas de Interacción con Receptores/genética , Anciano , Anciano de 80 o más Años , Animales , Línea Celular Tumoral , ADN (Citosina-5-)-Metiltransferasa 1/genética , ADN (Citosina-5-)-Metiltransferasa 1/metabolismo , Metilación de ADN , Femenino , Estudios de Seguimiento , Regulación Neoplásica de la Expresión Génica , Técnicas de Silenciamiento del Gen , Humanos , Estimación de Kaplan-Meier , Masculino , Mesotelioma Maligno/genética , Mesotelioma Maligno/mortalidad , Mesotelioma Maligno/patología , Ratones , Persona de Mediana Edad , Necroptosis/genética , Regiones Promotoras Genéticas/genética , Ensayos Antitumor por Modelo de Xenoinjerto
13.
ERJ Open Res ; 7(1)2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33564672

RESUMEN

Asthma therapy, including monoclonal antibodies, was not associated with #COVID19 infection or hospitalisation in a UK severe asthma population. Shielding led to a reported worsening of mental health in nearly half of patients contacted (47%). https://bit.ly/3jImUsG.

14.
J Anal Toxicol ; 44(7): 734-740, 2020 Oct 12.
Artículo en Inglés | MEDLINE | ID: mdl-33043985

RESUMEN

The historical practice of brewing poppy tea for its opioid-like effects is reoccurring with modern-day substance users. We present four postmortem cases with toxicology results that serve as case studies for the potential hazards of poppy tea ingestion. There is limited information regarding the risks of this practice due to the variability of the morphine content of the opium exuded from the plant. While internet tea recipes offer guidance, differences in poppy cultivation, washing, and infusing time are some of the reasons why the beverage may contain inconsistent and clinically significant alkaloid concentrations for each preparation. Variability in opioid tolerance along with additional drugs taken will impact the overall degree of toxicity experienced from the opiates in the tea. Advancements in the genetic modification of the poppy plant could greatly alter the ratio of alkaloids seen in biological fluids and will be highly dependent on the source of the poppy product. The blood concentrations of free morphine and free codeine in cases 1-3 where the toxicity from the tea was considered the primary cause of death were 0.94 and 0.11 mg/L, 0.62 and 0.034 mg/L, and 0.16 and 0.010 mg/L, respectively. The urine concentrations of morphine and codeine were 13 and 0.94 mg/L in case 1 and 16 and 1.6 mg/L in case 2, respectively. The opium alkaloids thebaine and laudanosine were identified qualitatively by our routine organic base/neutral drug detection procedure.


Asunto(s)
Sobredosis de Droga , Extractos Vegetales/envenenamiento , Tés de Hierbas , Analgésicos Opioides , Tolerancia a Medicamentos , Humanos , Morfina , Papaver
16.
J Neurodev Disord ; 11(1): 34, 2019 12 16.
Artículo en Inglés | MEDLINE | ID: mdl-31839002

RESUMEN

BACKGROUND: Intrauterine growth restriction (IUGR) is a common complication of pregnancy and is associated with significant neurological deficits in infants, including white matter damage. Previous work using an animal model of IUGR has demonstrated that IUGR rats exhibit neurobehavioral deficits and developmental delays in oligodendrocyte maturation and myelination, but the mechanisms which cause this delay are unknown. Inflammation may be an important etiological factor in IUGR and has been recognized as playing a fundamental role in the pathogenesis of myelin disorders, including cerebral palsy. METHODS: To create the model, the uterine arteries of pregnant rats were ligated at embryonic day 15. Rats delivered spontaneously. Cytokine and chemokine expression was evaluated at one prenatal and three postnatal time points, and myelin protein expression and oligodendrocyte cell numbers were evaluated by several methods at postnatal day 14. IL-4 was identified as a potential inhibitor of myelination, and rat pups were injected with IL-4 function blocking antibody from postnatal days 1-5 and myelination was assessed. RESULTS: Here, we show a novel mechanism of white matter injury. IUGR induces an exaggerated Th2 response in the developing rat brain, including upregulation of several Th2 cytokines. Of these, IL-4 is significantly increased during the period corresponding to robust developmental myelination. We show that neutralizing IL-4 antibody therapy given in the newborn period ameliorates inflammation and restores myelin protein expression and oligodendrocyte cell number in the IUGR brain to control levels, demonstrating a novel role for Th2 responses and IL-4 in IUGR and white matter injury. In addition, IL-4 directly affects oligodendrocytes in vitro decreasing differentiation. CONCLUSIONS: In this study, we have identified inflammation as a factor in the decrease in myelin seen in an animal model of IUGR. IL-4, an inflammatory protein often thought to be protective in the adult, is specifically increased, and treatment of these animals to prevent this increase ameliorates white matter damage. Our results suggest that the immune system plays a role in IUGR that is different in the perinatal period than in the adult and preventing this exaggerated Th2 response may be a potential therapeutic target.


Asunto(s)
Encéfalo/inmunología , Encefalitis/inmunología , Retardo del Crecimiento Fetal/inmunología , Interleucina-4/inmunología , Vaina de Mielina/inmunología , Células Th2/inmunología , Animales , Modelos Animales de Enfermedad , Encefalitis/complicaciones , Femenino , Macrófagos/inmunología , Masculino , Microglía/inmunología , Ratas Sprague-Dawley , Sustancia Blanca/inmunología
17.
Physiol Rep ; 5(23)2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29192067

RESUMEN

The objective of this study is to test the hypothesis that increased muscle mass has positive effects on cardiovascular function. Specifically, we tested the hypothesis that increases in lean body mass caused by deletion of myostatin improves cardiac performance and vascular function. Echocardiography was used to quantify left ventricular function at baseline and after acute administration of propranolol and isoproterenol to assess ß-adrenergic reactivity. Additionally, resistance vessels in several beds were removed, cannulated, pressurized to 60 mmHg and reactivity to vasoactive stimuli was assessed. Hemodynamics were measured using in vivo radiotelemetry. Myostatin deletion results in increased fractional shortening at baseline. Additionally, arterioles in the coronary and muscular microcirculations are more sensitive to endothelial-dependent dilation while nonmuscular beds or the aorta were unaffected. ß-adrenergic dilation was increased in both coronary and conduit arteries, suggesting a systemic effect of increased muscle mass on vascular function. Overall hemodynamics and physical characteristics (heart weight and size) remained unchanged. Myostatin deletion mimics in part the effects of exercise on cardiovascular function. It significantly increases lean muscle mass and results in muscle-specific increases in endothelium-dependent vasodilation. This suggests that increases in muscle mass may serve as a buffer against pathological states that specifically target cardiac function (heart failure), the ß-adrenergic system (age), and nitric oxide bio-availability (atherosclerosis). Taken together, pharmacological inhibition of the myostatin pathway could prove an excellent mechanism by which the benefits of exercise can be conferred in patients that are unable to exercise.


Asunto(s)
Vasos Coronarios/metabolismo , Corazón/fisiología , Microvasos/metabolismo , Miostatina/genética , Vasodilatación , Agonistas Adrenérgicos beta/farmacología , Antagonistas Adrenérgicos beta/farmacología , Animales , Presión Sanguínea , Vasos Coronarios/efectos de los fármacos , Vasos Coronarios/fisiología , Eliminación de Gen , Frecuencia Cardíaca , Isoproterenol/farmacología , Masculino , Ratones , Ratones Endogámicos ICR , Microvasos/efectos de los fármacos , Microvasos/fisiología , Músculo Esquelético/crecimiento & desarrollo , Propranolol/farmacología , Función Ventricular
18.
Psychiatry Res ; 239: 111-6, 2016 05 30.
Artículo en Inglés | MEDLINE | ID: mdl-27137970

RESUMEN

Veterans with schizophrenia admitted for suicidal ideation were recruited into a post-discharge program consisting of Intensive Case Monitoring (ICM) with daily monitoring with the Health Buddy (HB; experimental group) or ICM alone (control group). This study tested the feasibility of the telehealth monitoring intervention in this population. Secondly, we determined whether augmentation of ICM with our intervention for 3 months would result in a reduction in suicidal ideation. Twenty of 25 telehealth participants could set up the device. Monthly adherence for telehealth participants was > 80%. A qualitative analysis of endpoint surveys revealed that the majority of participants had positive responses. In both groups, there were improvements in Beck Scale for Suicidal Ideation (BSS) scores at endpoint relative to baseline. No group differences were present with survival analysis when using remission (i.e., BSS score = 0) as the outcome; however, in a subgroup with a history of suicide attempt, there was a trend (p = .093) for a higher rate of remission for those in the HB condition. In conclusion, telehealth monitoring for this population appears to be feasible for those who are able to start using the system. The pilot data obtained should help investigators design better telehealth interventions for this population.


Asunto(s)
Cuidados Críticos/estadística & datos numéricos , Esquizofrenia/diagnóstico , Esquizofrenia/terapia , Ideación Suicida , Telemedicina/estadística & datos numéricos , Veteranos/psicología , Adulto , Cuidados Críticos/métodos , Estudios de Factibilidad , Femenino , Hospitalización , Humanos , Masculino , Persona de Mediana Edad , Monitoreo Fisiológico/métodos , Monitoreo Fisiológico/estadística & datos numéricos , Proyectos Piloto , Intento de Suicidio/prevención & control , Intento de Suicidio/psicología , Telemedicina/métodos
19.
PLoS One ; 11(2): e0149848, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-26919709

RESUMEN

Small-molecule agonists have been identified for TLR7, TLR8, TLR4 and TLR2 thus far, and chemotypes other than those of canonical ligands are yet to be explored for a number of innate immune receptors. The discovery of novel immunostimulatory molecules would enhance the repertoire of tools available for interrogating innate immune effector mechanisms, and provide additional venues for vaccine adjuvant development. A multiplexed, reporter gene-based high-throughput assay capable of detecting agonists of TLR2, TLR3, TLR4, TLR5, TLR7, TLR8, TLR9, NOD1 and NOD2 was utilized in screening 123,943 compounds, in which amphotericin B (AmpB) and nystatin were identified as prominent hits. The polyene antifungal agents act as TLR2- and TLR4-agonists. The TLR4-stimulatory activity of AmpB was similar to that of monophosphoryl lipid A, suggestive of TRIF-biased signaling. The adjuvantic activity of AmpB, at a dose of 100 micrograms, was comparable to several other candidate adjuvants in rabbit models of immunization. These results point to its potential applicability as a safe and effective adjuvant for human vaccines.


Asunto(s)
Adyuvantes Inmunológicos/farmacología , Anfotericina B/farmacología , Receptores Inmunológicos/agonistas , Receptores Toll-Like/agonistas , Línea Celular , Humanos , Nistatina/farmacología , Vacunas
20.
J Med Chem ; 59(7): 3311-30, 2016 Apr 14.
Artículo en Inglés | MEDLINE | ID: mdl-26966993

RESUMEN

Activation of human toll-like receptor-8 (TLR8), expressed in myeloid dendritic cells, monocytes, and monocyte-derived dendritic cells, evokes a distinct cytokine profile which favors the development of Type 1 helper T cells. Part-structures of the 2-aminobenzimidazole scaffold were examined with a view to identifying structural requisites corresponding to the smallest possible fragment of the benzimidazole core that would allow for retention of TLR8-agonistic activity. TLR8-specific agonistic activity was retained in 1-pentyl-4-phenyl-1H-imidazol-2-amine. The crystal structure of this compound bound to the TLR8 ectodomain displayed binding interactions that are common to other TLR8 agonists. This compound showed markedly attenuated proinflammatory properties in ex vivo human blood models. SAR studies revealed that 4-(2-(benzyloxy)phenyl)-1-pentyl-1H-imidazol-2-amine inhibited TLR signaling in a variety of TLR reporter cell lines, as well as in pharmacologically relevant human blood model systems. A kinase screen of this compound showed relative specificity for calmodulin kinases.


Asunto(s)
Proteínas Quinasas Dependientes de Calcio-Calmodulina/antagonistas & inhibidores , Citocinas/metabolismo , Imidazoles/química , Imidazoles/farmacología , Inhibidores de Proteínas Quinasas/farmacología , Receptor Toll-Like 8/agonistas , Células Cultivadas , Humanos , Leucocitos Mononucleares/citología , Leucocitos Mononucleares/efectos de los fármacos , Leucocitos Mononucleares/metabolismo , Monocitos/citología , Monocitos/efectos de los fármacos , Monocitos/metabolismo , FN-kappa B/metabolismo , Inhibidores de Proteínas Quinasas/química , Transducción de Señal/efectos de los fármacos , Relación Estructura-Actividad
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA