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1.
Artículo en Inglés | MEDLINE | ID: mdl-38923936

RESUMEN

Opioid overdose death is significantly increased immediately following incarceration. Evidence-based medications are underutilized in rural jails and detention centers. We have reported our efforts to address this gap through telemedicine-based medications for opioid use disorder treatment (tele-MOUD) for incarcerated patients. Staff acceptance and perceptions are critically important factors in the assurance of program validation. We assessed tele-MOUD acceptability and perceptions of effectiveness and stigma in one detention center. Overall, we found that jail staff's general acceptability of the program was rather low, as was perceived effectiveness of MOUD, while stigmatizing beliefs were present. Furthermore, tele-MOUD acceptability was positively correlated with perceptions of MOUD effectiveness and negatively correlated with stigmatizing notions of MOUD (p's < 0.001). Findings suggest the need for educational interventions. Future research investigating the potential moderating effects of training on staff acceptability of jail-based tele-MOUD will support the implementation and sustainability of these life-saving programs.

2.
JAMA Netw Open ; 6(4): e237099, 2023 04 03.
Artículo en Inglés | MEDLINE | ID: mdl-37043203

RESUMEN

Importance: Methadone treatment is the most effective evidence-based treatment for opioid use disorder (OUD), but challenges related to dosing and premature treatment dropout argue for adjunct interventions to improve outcomes. One potential behavioral intervention with low risk involves harnessing placebo effects. Objective: To determine the effect of a pharmacologically conditioned open-label placebo (C-OLP) on 90-day methadone dose, retention, drug use, withdrawal, craving, quality of life, and sleep. Design, Setting, and Participants: This 2-arm, open-label, single-blind randomized clinical trial was conducted between December 5, 2017, and August 2, 2019, in an academically affiliated community opioid treatment program. Analyses were conducted between October 1, 2019, and April 30, 2020. A total of 320 newly enrolled adults seeking treatment for moderate to severe OUD were assessed for study eligibility; 131 met eligibility criteria, provided informed consent, and were randomized to either C-OLP or treatment as usual (TAU) in an unequal-block (3:2) manner. Exclusion criteria were pregnancy, hospital/program transfers, and court-ordered treatment. Interventions: Participants randomized to C-OLP received pharmacologic conditioning and a placebo pill and methadone, and participants randomized to TAU were given methadone only. Participants met with the study team 5 times: at baseline (treatment intake) and 2, 4, 8, and 12 weeks postbaseline. Interactions were balanced between the 2 groups. Main Outcomes and Measures: Outcomes included 90-day methadone dose (primary) and treatment retention, drug use, withdrawal, craving, quality of life, and sleep quality (secondary). Analyses were conducted as intention-to-treat. Results: Of the 131 people enrolled in the study, 54 were randomized to TAU and 77 to C-OLP. Mean (SD) age was 45.9 (11.2) years; most of the participants were Black or African American (83 [63.4%]) and male (84 [64.1%]). No significant group differences were observed in the mean (SD) 90-day methadone dose (83.1 [25.1] mg for group TAU, 79.4 [19.6] mg for group C-OLP; t = 0.621991; P = .43), but the groups differed significantly in their retention rates: 33 (61.1%) for TAU and 60 (77.9%) for C-OLP (χ21 = 4.356; P = .04; number needed to treat for the beneficial outcome of 3-month treatment retention, 6; 95% CI, 4-119). C-OLP participants also reported significantly better sleep quality. Conclusions and Relevance: In this randomized clinical trial, C-OLP had no effect on the primary outcome of 90-day methadone dose. However, C-OLP participants were significantly more likely to remain in treatment. These findings support the use of C-OLP as a methadone treatment adjunct, but larger trials are needed to further examine the use of C-OLP. Trial Registration: ClinicalTrials.gov Identifier: NCT02941809.


Asunto(s)
Metadona , Trastornos Relacionados con Opioides , Adulto , Masculino , Humanos , Persona de Mediana Edad , Metadona/uso terapéutico , Calidad de Vida , Método Simple Ciego , Trastornos Relacionados con Opioides/tratamiento farmacológico , Trastornos Relacionados con Opioides/rehabilitación , Analgésicos Opioides/uso terapéutico
3.
Cancer Discov ; 13(6): 1454-1477, 2023 06 02.
Artículo en Inglés | MEDLINE | ID: mdl-36883955

RESUMEN

Metastatic breast cancer is an intractable disease that responds poorly to immunotherapy. We show that p38MAPKα inhibition (p38i) limits tumor growth by reprogramming the metastatic tumor microenvironment in a CD4+ T cell-, IFNγ-, and macrophage-dependent manner. To identify targets that further increased p38i efficacy, we utilized a stromal labeling approach and single-cell RNA sequencing. Thus, we combined p38i and an OX40 agonist that synergistically reduced metastatic growth and increased overall survival. Intriguingly, patients with a p38i metastatic stromal signature had better overall survival that was further improved by the presence of an increased mutational load, leading us to ask if our approach would be effective in antigenic breast cancer. The combination of p38i, anti-OX40, and cytotoxic T-cell engagement cured mice of metastatic disease and produced long-term immunologic memory. Our findings demonstrate that a detailed understanding of the stromal compartment can be used to design effective antimetastatic therapies. SIGNIFICANCE: Immunotherapy is rarely effective in breast cancer. We dissected the metastatic tumor stroma, which revealed a novel therapeutic approach that targets the stromal p38MAPK pathway and creates an opportunity to unleash an immunologic response. Our work underscores the importance of understanding the tumor stromal compartment in therapeutic design. This article is highlighted in the In This Issue feature, p. 1275.


Asunto(s)
Neoplasias , Ratones , Animales , Linfocitos T Citotóxicos , Linfocitos T CD4-Positivos , Inmunoterapia , Macrófagos , Microambiente Tumoral , Línea Celular Tumoral
4.
J Subst Use Addict Treat ; 145: 208946, 2023 02.
Artículo en Inglés | MEDLINE | ID: mdl-36880915

RESUMEN

INTRODUCTION: Following the March 2020 federal declaration of a COVID-19 public health emergency, in line with recommendations for social distancing and decreased congregation, federal agencies issued sweeping regulation changes to facilitate access to medications for opioid use disorder (MOUD) treatment. These changes allowed patients new to treatment to receive multiple days of take-home medications (THM) and to use remote technology for treatment encounters-allowances that previously had been reserved exclusively for "stable" patients who met minimum adherence and time-in-treatment criteria. The impact of these changes on low-income, minoritized patients (frequently the largest recipients of opioid treatment program [OTP]-based addiction care), however, is not well characterized. We aimed to explore the experiences of patients who were enrolled in treatment prior to COVID-19 OTP regulation changes, with the goal of understanding patients' perceptions of the impact of these changes on treatment. METHODS: This study included semistructured, qualitative interviews with 28 patients. We used a purposeful sampling method to recruit individuals who were active in treatment just before COVID-19-related policy changes went into effect, and who were still in treatment several months later. To ensure a diverse array of perspectives, we interviewed individuals who either had or had not experienced challenges with methadone medication adherence from 3/24/21 to 6/8/21, approximately 12-15 months following the onset of COVID-19. Interviews were transcribed and coded using thematic analysis. RESULTS: Participants were majority male (57 %), Black/African American (57 %), with a mean age of 50.1 (SD = 9.3). Fifty percent received THM prior to COVID-19, which increased to 93 % during the pandemic. COVID-19 program changes had mixed effects on treatment and recovery experiences. Themes identified convenience, safety, and employment as reasons for preferring THM. Challenges included difficulty with managing/storing medications, experiencing isolation, and concern about relapse. Furthermore, some participants reported that telebehavioral health encounters felt less personal. CONCLUSIONS: Policymakers should consider patients' perspectives to foster a more patient-centered approach to methadone dosing that is safe, flexible, and accommodating to a diverse array of patients' needs. Additionally, technical support should be provided to OTPs to ensure interpersonal connections are maintained in the patient-provider relationship beyond the pandemic.


Asunto(s)
COVID-19 , Trastornos Relacionados con Opioides , Humanos , Masculino , Persona de Mediana Edad , Analgésicos Opioides/uso terapéutico , Baltimore/epidemiología , Metadona/uso terapéutico , Trastornos Relacionados con Opioides/tratamiento farmacológico , Evaluación del Resultado de la Atención al Paciente
5.
Int J Surg Pathol ; 31(8): 1516-1521, 2023 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36823781

RESUMEN

Gastroblastoma is an extremely rare biphasic tumor that typically occurs in the stomach in patients between the ages of 10 and 30. Only 16 cases have been reported previously. These tumors are important to diagnose and distinguish from more aggressive neoplasms; although numbers are small, prognosis appears excellent overall with complete excision, with only occasional metastasis and/or local recurrence. We report a case of gastroblastoma in a 26-year-old male arising from the pylorus and extending through the first and second portions of the duodenum. This is the first case to be reported from this specific location.


Asunto(s)
Píloro , Neoplasias Gástricas , Masculino , Humanos , Niño , Adolescente , Adulto Joven , Adulto , Píloro/cirugía , Píloro/patología , Neoplasias Gástricas/diagnóstico , Neoplasias Gástricas/cirugía , Neoplasias Gástricas/patología , Duodeno/patología , Gastrectomía
6.
Harm Reduct J ; 20(1): 17, 2023 02 14.
Artículo en Inglés | MEDLINE | ID: mdl-36788601

RESUMEN

BACKGROUND: Despite the widespread availability of naloxone, US opioid overdose rates continue to rise. The "Cascade of Care" (CoC) is a public health approach that identifies steps in achieving specific outcomes and has been used to identify gaps in naloxone carriage among individuals with opioid use disorder (OUD). We sought to apply this framework to a treatment-seeking population with OUD that may be more inclined to engage in harm reduction behaviors. METHODS: Patients were recruited from an urban methadone program to complete a survey. We assessed naloxone familiarity, availability, obtainability, training, and possession, as well as naloxone carriage rates, demographics, and harm reduction behaviors. A multivariable logistic regression examined associations between naloxone carriage and individual-level factors. RESULTS: Participants (n = 97) were majority male (59%), with a mean age of 48 (SD = 12), 27% had college education or higher, 64% indicated injection drug use, and 84% reported past naloxone training. All participants endorsed familiarity with naloxone, but only 42% regularly carried naloxone. The following variables were associated with carrying naloxone: White race (aOR = 2.94, 95% CI 1.02-8.52), college education (aOR = 8.11, 95% CI 1.76-37.47), and total number of self-reported harm reduction behaviors (aOR = 1.45, 95% CI 1.00-2.11). CONCLUSION: We found low rates of naloxone carriage among methadone-treated patients. Methadone programs provide opportunities for naloxone interventions and should target racial/ethnic minorities and individuals with lower education. The spectrum of harm reduction behaviors should be encouraged among these populations to enhance naloxone carriage.


Asunto(s)
Sobredosis de Droga , Trastornos Relacionados con Opioides , Humanos , Masculino , Persona de Mediana Edad , Naloxona/uso terapéutico , Antagonistas de Narcóticos/uso terapéutico , Reducción del Daño , Sobredosis de Droga/tratamiento farmacológico , Trastornos Relacionados con Opioides/rehabilitación , Metadona/uso terapéutico , Analgésicos Opioides/uso terapéutico
7.
J Ethn Subst Abuse ; 22(1): 89-105, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-33554763

RESUMEN

Rates of opioid use disorder (OUD) have increased dramatically over the past two decades, a rise that has been accompanied by changing demographics of those affected. Early exposure to drugs is a known risk factor for later development of opioid use disorder; but how and whether this risk factor may differ between racial groups is unknown. Our study seeks to identify race differences in self-report of current and past substance use in OUD-diagnosed treatment-seeking individuals. Patients (n = 157) presenting for methadone maintenance treatment at a racially diverse urban opioid treatment program were approached and consented for study involvement. Participants were administered substance use history questionnaires and urine drug screening at intake. Chi-square, t-tests, and rank-sum were used to assess race differences in demographic variables. Logistic and linear regressions assessed the relationship between race and substance use for binary and continuous variables, respectively. 61% of the population identified as Black and 39% as White. Black participants were significantly older; age was thus included as a covariate. Logistic regressions demonstrated that despite similar urine toxicology at intake, White participants were significantly more likely to report having used prescription opioids and psychedelic, stimulant, and sedative substance classes prior to their first use of non-pharmaceutical opioids. Compared to Black participants, White treatment-seeking OUD-diagnosed individuals reported using a wider range of substances ever and prior to first use of non-pharmaceutical opioids. There were no differences, however, in presentation for OUD treatment, suggesting different pathways to OUD, which may carry important clinical implications.


Asunto(s)
Trastornos Relacionados con Opioides , Humanos , Trastornos Relacionados con Opioides/epidemiología , Metadona , Analgésicos Opioides/uso terapéutico , Tratamiento de Sustitución de Opiáceos , Grupos Raciales
8.
Med Humanit ; 49(2): 289-296, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36192139

RESUMEN

Even as Wilkie Collins's Heart and Science continues in the tradition of cautionary tales of medicine and science, it also integrates nineteenth-century discussions of medical ethics, vivisection and women, further building on earlier criticisms of scientific hubris. By indicting a fictional medical doctor and his methodology, Heart and Science depicts the extremes of good and bad, ethical and unethical medicine-whether the doctor can care, and not simply solve the medical enigma-in light of a changing medical field that prized objectivity and distance from the subject over the old holistic way of listening to a patient in order to understand her malady. In reading Collins within his historical context and against a changing environment within the medical sciences, literary critics discern a gendered doctor-patient relationship and observe a Victorian author's attempts to combat the fears of scientific advancement by using or aligning himself with a proto-feminist perspective.


Asunto(s)
Relaciones Médico-Paciente , Vivisección , Animales , Femenino , Humanos , Vivisección/historia , Ética Médica
9.
J Aging Stud ; 63: 101032, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36462928

RESUMEN

This roundtable discussion is a creative contribution to this special issue on 'aging masculinities' based on questions posed by editor Stephen Katz to three leading senior scholars in the critical gerontological field in the United States. W. Andrew Achenbaum is a renowned historian who has devoted his career to writing about the relevance of past politics, cultures, and knowledges of aging to comprehending our current dilemmas. Thomas R. Cole is an acclaimed historical scholar and mentor to generations of Humanities researchers across the globe. His work also includes film, literature, ethics, and spirituality. Brian de Vries is a social gerontologist whose bold research on LGBTQ aging is a powerful voice in critiquing the multiple forms of discrimination, violence and hardships, and denied rights and life-chances imposed by hetero-patriarchal regimes in later life. That these men have shaped and been shaped by their work and advocacy is the key theme that inspires our conversation.


Asunto(s)
Geriatría , Masculino , Humanos , Envejecimiento , Masculinidad , Geriatras , Películas Cinematográficas
10.
J Psychedelic Stud ; 6(2): 80-87, 2022 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-36686617

RESUMEN

Background and aims: There is growing evidence that psilocybin, a serotonergic psychedelic substance, may be useful in the treatment of substance use disorders. However, there is a lack of data on the beliefs and attitudes towards psilocybin amongst Black individuals diagnosed with Opioid Use Disorder (OUD). This study characterized psilocybin use patterns and perception of risk amongst a cohort of Black individuals diagnosed with OUD. Methods: Using a convenience sampling approach, patients were recruited from an urban methadone treatment program and paid five dollars to complete an anonymous phone-based survey. Results: Twenty-eight patients participated (mean age 53.8; N = 28; 35.7% female). Most (N = 23; 82.1%) had "heard of" psilocybin mushrooms before taking the survey, but only five (N = 5; 17.8%) had ever used them. More than 80% perceived a risk or were "unsure" of the risk for sixteen of the seventeen items queried about psilocybin. Approximately half (N = 15; 53.6%) were willing to try therapy incorporating psilocybin and half (N = 14; 50%) said they would be more likely to try if it were FDA approved for OUD. Most (N = 18; 64.3%) preferred to stay on methadone treatment alone, 32.1% (N = 9) wanted to try treatment with both psilocybin and methadone, and only one participant opted for psilocybin treatment without methadone. Conclusion: Many Black individuals with Opioid Use Disorder perceive psilocybin as dangerous and may be hesitant to try psilocybin treatment. Culturally informed treatment models, educational interventions and community outreach programs should be developed to increase racial/ethnic minority representation in psilocybin research and treatment.

11.
Front Psychiatry ; 12: 703685, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34777036

RESUMEN

Over 10 million individuals pass through U.S. detention centers on an annual basis, with nearly two-thirds meeting criteria for drug dependence/abuse. Despite proven efficacy, treatment with medications for opioid use disorder (MOUD) is underutilized in jail settings-a gap that could be addressed using telemedicine. Here we describe a new program of telemedicine-based clinical provision of new/continuing buprenorphine treatment for individuals detained in a rural jail. Implementation objectives were completed between January and August 2020, and patient encounters were conducted between August 2020 and February 2021. We established (i) telemedicine hardware/software capability; (ii) a screening process; (iii) buprenorphine administration methods; (iv) necessary medical release procedures; (v) telemedicine encounter coordination and medication prescription procedures; and (vi) a research platform. Seven incarcerated patients have been treated, two of whom were referred from community treatment. Patients were mostly male (71%), non-Hispanic White (86%), and averaged 33 years old. All patients tested positive for an opioid upon intake and began/continued buprenorphine treatment in the jail. Average time to first MOUD appointment was 9 days and patients were maintained in treatment an average 21 days. Referrals for continuing community treatment were offered to all patients prior to discharge. We report successful implementation of telemedicine MOUD in a rural detention center, with treatment engagement and initiation occurring prior to the high-risk period of discharge. The fact that this program was launched during the height of the pandemic highlights the flexibility of telemedicine-based buprenorphine treatment. Challenges and obstacles to implementation of buprenorphine treatment in a correctional system are discussed.

12.
Artículo en Inglés | MEDLINE | ID: mdl-34419711

RESUMEN

Laboratory measurements of intrinsic clearance support the development of TK models, with potential relevance to weight of evidence toxicity assessments of xenobiotics, including read-across, the concept of predictive estimation by data extrapolation between chemicals of similar structure (analogues). In this work a procedure with analytical method for determination of in vitro hepatic metabolic clearance, relevant to biotransformation toxicokinetic (TK) modelling, is presented. Cryopreserved primary human hepatocytes represent a suitable cells, due to their biological characteristics, for providing an in vitro model for simulating in vivo metabolic clearance. The experimental part considered an adequate sequential time-frame for collecting samples and controls for all chemicals tested, including centrifugation and aliquoting of the corresponding fractions until the instrumental session. For the first time, in vitro hepatocyte intrinsic clearance was measured for six analogue test chemicals: valproic acid, 2-ethyl caproic acid, octanoic acid, valeric acid, 2-methyl butyric acid and 2-trans pentenoic acid, during incubated cell culture exposure up to 2 h or 3.5 h. The time dependence of any metabolism was determined from analysis of the supernatant at intervals using a new developed analytical method for UPLC coupled with QTOF mass spectrometer. The chemicals could then be ranked by their relative intrinsic clearance. The analyses were reproducible, with coherence of the calculated in vitro intrinsic clearance between experiments.


Asunto(s)
Cromatografía Líquida de Alta Presión/métodos , Eliminación Hepatobiliar/fisiología , Hígado/metabolismo , Espectrometría de Masas/métodos , Ácido Valproico , Células Cultivadas , Hepatocitos/citología , Hepatocitos/metabolismo , Humanos , Límite de Detección , Modelos Lineales , Hígado/citología , Reproducibilidad de los Resultados , Ácido Valproico/análogos & derivados , Ácido Valproico/análisis , Ácido Valproico/metabolismo
13.
JAMA ; 324(21): 2163-2164, 2020 12 01.
Artículo en Inglés | MEDLINE | ID: mdl-33258875
14.
Front Immunol ; 11: 613496, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33613536

RESUMEN

Systems vaccinology has been applied to detect signatures of human vaccine induced immunity but its ability, together with high definition in vivo clinical imaging is not established to predict vaccine reactogenicity. Within two European Commission funded high impact programs, BIOVACSAFE and ADITEC, we applied high resolution positron emission tomography/computed tomography (PET/CT) scanning using tissue-specific and non-specific radioligands together with transcriptomic analysis of muscle biopsies in a clinical model systematically and prospectively comparing vaccine-induced immune/inflammatory responses. 109 male participants received a single immunization with licensed preparations of either AS04-adjuvanted hepatitis B virus vaccine (AHBVV); MF59C-adjuvanted (ATIV) or unadjuvanted seasonal trivalent influenza vaccine (STIV); or alum-OMV-meningococcal B protein vaccine (4CMenB), followed by a PET/CT scan (n = 54) or an injection site muscle biopsy (n = 45). Characteristic kinetics was observed with a localized intramuscular focus associated with increased tissue glycolysis at the site of immunization detected by 18F-fluorodeoxyglucose (FDG) PET/CT, peaking after 1-3 days and strongest and most prolonged after 4CMenB, which correlated with clinical experience. Draining lymph node activation peaked between days 3-5 and was most prominent after ATIV. Well defined uptake of the immune cell-binding radioligand 11C-PBR28 was observed in muscle lesions and draining lymph nodes. Kinetics of muscle gene expression module upregulation reflected those seen previously in preclinical models with a very early (~6hrs) upregulation of monocyte-, TLR- and cytokine/chemokine-associated modules after AHBVV, in contrast to a response on day 3 after ATIV, which was bracketed by whole blood responses on day 1 as antigen presenting, inflammatory and innate immune cells trafficked to the site of immunization, and on day 5 associated with activated CD4+ T cells. These observations confirm the use of PET/CT, including potentially tissue-, cell-, or cytokine/chemokine-specific radioligands, is a safe and ethical quantitative technique to compare candidate vaccine formulations and could be safely combined with biopsy to guide efficient collection of samples for integrated whole blood and tissue systems vaccinology in small-scale but intensive human clinical models of immunization and to accelerate clinical development and optimisation of vaccine candidates, adjuvants, and formulations.


Asunto(s)
Adyuvantes Inmunológicos/metabolismo , Fluorodesoxiglucosa F18/metabolismo , Ganglios Linfáticos/metabolismo , Músculos/metabolismo , Transcriptoma/inmunología , Vacunas/metabolismo , Adolescente , Adulto , Linfocitos T CD4-Positivos/inmunología , Linfocitos T CD4-Positivos/metabolismo , Citocinas/inmunología , Femenino , Humanos , Inmunización/métodos , Cinética , Ganglios Linfáticos/inmunología , Masculino , Persona de Mediana Edad , Músculos/inmunología , Tomografía Computarizada por Tomografía de Emisión de Positrones/métodos , Vacunación/métodos , Vacunas/inmunología , Adulto Joven
15.
Front Public Health ; 8: 557275, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33553083

RESUMEN

Telemedicine is increasingly being used to treat patients with opioid use disorder (OUD). It has particular value in rural areas of the United States impacted by the opioid crisis as these areas have a shortage of trained addiction medicine providers. Patient satisfaction significantly impacts positive clinical outcomes in OUD treatment and thus is of great clinical interest. Yet little is known regarding patient satisfaction with the increasingly important platform of telemedicine-delivered medications for opioid use disorder (tMOUD). The goal of this review is to provide a summary of the existing literature regarding patient satisfaction with tMOUD. We also submit a novel survey based on an existing framework designed to assess tMOUD satisfaction, and present pilot data (N = 14) acquired from patients engaged in rural tMOUD care. Telemedicine provides a feasible method for delivering MOUD in rural areas, and our survey provides a useful assessment to measure patient satisfaction with tMOUD. In light of the pressing need for innovative and technology-driven solutions to the opioid epidemic (especially in light of the COVID-19 pandemic), future research should focus on the development and refinement of tools to assess the important implementation goal of patient satisfaction.


Asunto(s)
Buprenorfina/uso terapéutico , Antagonistas de Narcóticos/uso terapéutico , Trastornos Relacionados con Opioides/tratamiento farmacológico , Satisfacción del Paciente , Telemedicina , Adulto , Humanos , Tratamiento de Sustitución de Opiáceos , Epidemia de Opioides , Población Rural , Encuestas y Cuestionarios , Estados Unidos
17.
Glob Chang Biol ; 25(12): 4315-4326, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31465581

RESUMEN

Mangrove forests play an important role in climate change adaptation and mitigation by maintaining coastline elevations relative to sea level rise, protecting coastal infrastructure from storm damage, and storing substantial quantities of carbon (C) in live and detrital pools. Determining the efficacy of mangroves in achieving climate goals can be complicated by difficulty in quantifying C inputs (i.e., differentiating newer inputs from younger trees from older residual C pools), and mitigation assessments rarely consider potential offsets to CO2 storage by methane (CH4 ) production in mangrove sediments. The establishment of non-native Rhizophora mangle along Hawaiian coastlines over the last century offers an opportunity to examine the role mangroves play in climate mitigation and adaptation both globally and locally as novel ecosystems. We quantified total ecosystem C storage, sedimentation, accretion, sediment organic C burial and CH4 emissions from ~70 year old R. mangle stands and adjacent uninvaded mudflats. Ecosystem C stocks of mangrove stands exceeded mudflats by 434 ± 33 Mg C/ha, and mangrove establishment increased average coastal accretion by 460%. Sediment organic C burial increased 10-fold (to 4.5 Mg C ha-1  year-1 ), double the global mean for old growth mangrove forests, suggesting that C accumulation from younger trees may occur faster than previously thought, with implications for mangrove restoration. Simulations indicate that increased CH4 emissions from sediments offset ecosystem CO2 storage by only 2%-4%, equivalent to 30-60 Mg CO2 -eq/ha over mangrove lifetime (100 year sustained global warming potential). Results highlight the importance of mangroves as novel systems that can rapidly accumulate C, have a net positive atmospheric greenhouse gas removal effect, and support shoreline accretion rates that outpace current sea level rise. Sequestration potential of novel mangrove forests should be taken into account when considering their removal or management, especially in the context of climate mitigation goals.


Asunto(s)
Carbono , Ecosistema , Conservación de los Recursos Naturales , Hawaii , Humedales
18.
Semin Pediatr Surg ; 28(4): 150819, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-31451174

RESUMEN

The field of maternal-fetal intervention is rapidly progressing and with it comes new and often complex ethical considerations that must be addressed. The purpose of this article is to review the ethical issues that arise in maternal-fetal intervention. We will provide two clinical scenarios and discuss the ethical issues related to each scenario and how they were addressed. We will also provide a list of recommended resources that any institutional offering maternal-fetal intervention should have in place to meet the ethical obligations of such work.


Asunto(s)
Toma de Decisiones , Feto/cirugía , Obstetricia/ética , Femenino , Humanos , Consentimiento Informado , Grupo de Atención al Paciente , Embarazo
20.
BMJ Open ; 9(6): e026604, 2019 06 21.
Artículo en Inglés | MEDLINE | ID: mdl-31230007

RESUMEN

INTRODUCTION: More than 2 million individuals in the USA have an opioid use disorder (OUD). Methadone maintenance treatment is the gold standard of medication-based treatment for OUD, but high-dose methadone is associated with cardiotoxicity and respiratory complications, among other side effects. These adverse effects make enhancing the effectiveness of lower doses of methadone an attractive therapeutic goal. Long recognised for its capacity to enhance treatment outcomes for a wide range of neuropsychiatric disorders including pain, the placebo effect offers an as-yet untested avenue to such an enhancement. This approach is particularly compelling given that individuals with substance use disorder tend to have higher salience attribution and may thereby be more sensitive to placebo effects. Our study combines two promising clinical methodologies-conditioning/dose-extension and open-label placebo-to investigate whether placebo effects can increase the effective potency of methadone in treatment-seeking OUD patients. METHODS AND ANALYSIS: A total of 120 newly enrolled treatment-seeking OUD patients will be randomly assigned to one of two different groups: either methadone plus daily placebo dose-extension (PDE; treatment group) or methadone/treatment as usual (control). Participants will meet with study team members five times over the course of 3 months of treatment with methadone (baseline, 2 weeks, and 1, 2 and 3 months postbaseline). Throughout this study time period, methadone dosages will be adjusted by an addiction clinician blind to patient assignment, per standard clinical methods. The primary outcome is methadone dose at 3 months. Secondary outcomes include self-report of drug use; 3-month urine toxicology screen results; and treatment retention. Exploratory outcomes include several environmental as well as personality factors associated with OUD and with propensity to demonstrate a placebo effect. ETHICS AND DISSEMINATION: Human subjects oversight for this study is provided by the University of Maryland, Baltimore and University of Maryland, College Park Institutional Review Boards. Additionally, the study protocol is reviewed annually by an independent Data and Safety Monitoring Board. Study results will be disseminated via research conference presentations and peer-reviewed publications. TRIAL REGISTRATION NUMBER: NCT02941809.


Asunto(s)
Metadona/uso terapéutico , Antagonistas de Narcóticos/uso terapéutico , Tratamiento de Sustitución de Opiáceos/métodos , Trastornos Relacionados con Opioides/tratamiento farmacológico , Adulto , Prescripciones de Medicamentos , Femenino , Humanos , Masculino , Maryland/epidemiología , Metadona/farmacología , Antagonistas de Narcóticos/farmacología , Trastornos Relacionados con Opioides/epidemiología , Proyectos Piloto , Placebos/uso terapéutico , Prueba de Estudio Conceptual , Ensayos Clínicos Controlados Aleatorios como Asunto , Resultado del Tratamiento
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