Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 38
Filtrar
1.
J Health Care Poor Underserved ; 35(3): 880-902, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39129608

RESUMEN

Home Together (HT) is a multi-level multi-component health promotion program, co-led by academic and non-profit partners in Arkansas that sought (1) to improve access to and family acceptance of social services and health care among women experiencing homelessness who have a diagnosed mental health condition and a child younger than six years and (2) to increase service provider capacity to engage with this population. A socioecological perspective was used to detail program components and lessons learned. Home Together enrolled 345 women representing unduplicated families. Of these, 214 completed six-month reassessments and 111 completed discharge assessments. Representative of the area and population served, most self-identified as belonging to racial minorities (87.0%), being younger than 35 years (80.1%), experiencing violence (76%), and being heterosexual (82%). Pre-post testing indicated positive changes for HT families, including improvements in mental health, health care access, and housing. Yet, even the most coordinated comprehensive programs are no substitute for policy-level changes that help families reach stability.


Asunto(s)
Promoción de la Salud , Personas con Mala Vivienda , Humanos , Femenino , Promoción de la Salud/organización & administración , Promoción de la Salud/métodos , Adulto , Arkansas , Accesibilidad a los Servicios de Salud/organización & administración , Persona de Mediana Edad , Preescolar , Trastornos Mentales/terapia , Adulto Joven , Evaluación de Programas y Proyectos de Salud , Niño , Servicio Social/organización & administración , Adolescente
2.
Dev Psychobiol ; 66(6): e22521, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-38952248

RESUMEN

Infants rely on developing attention skills to identify relevant stimuli in their environments. Although caregivers are socially rewarding and a critical source of information, they are also one of many stimuli that compete for infants' attention. Young infants preferentially hold attention on caregiver faces, but it is unknown whether they also preferentially orient to caregivers and the extent to which these attention biases reflect reward-based attention mechanisms. To address these questions, we measured 4- to 10-month-old infants' (N = 64) frequency of orienting and duration of looking to caregiver and stranger faces within multi-item arrays. We also assessed whether infants' attention to these faces related to individual differences in Surgency, an indirect index of reward sensitivity. Although infants did not show biased attention to caregiver versus stranger faces at the group level, infants were increasingly biased to orient to stranger faces with age and infants with higher Surgency scores showed more robust attention orienting and attention holding biases to caregiver faces. These effects varied based on the selective attention demands of the task, suggesting that infants' attention biases to caregiver faces may reflect both developing attention control skills and reward-based attention mechanisms.


Asunto(s)
Sesgo Atencional , Cuidadores , Desarrollo Infantil , Reconocimiento Facial , Recompensa , Humanos , Masculino , Lactante , Femenino , Cuidadores/psicología , Reconocimiento Facial/fisiología , Sesgo Atencional/fisiología , Desarrollo Infantil/fisiología , Atención/fisiología , Conducta del Lactante/fisiología
3.
J Rural Health ; 2024 Jun 12.
Artículo en Inglés | MEDLINE | ID: mdl-38867390

RESUMEN

PURPOSE: The opioid overdose crisis requires strengthening treatment systems with innovative technologies. How people use telehealth for opioid use disorder (OUD) is evolving and differs in rural versus urban areas, as telehealth is emerging as a local resource and complementary option to in-person treatment. We assessed changing trends in telehealth and medication for OUD (MOUD) and pinpoint locations of low telehealth and MOUD access. METHODS: We used national data from the Mental health and Addiction Treatment Tracking Repository (2016-2023) to identify specialty outpatient SUD treatment facilities in the United States (N = 83,988). We modeled the availability of telehealth using multilevel multivariable logistic regression, adjusting for covariates. We included a 3-way interaction to test for conditional effects of rurality, the number of MOUD medication types dispensed, and year. We included two random effects to account for clustering within counties and states. FINDINGS: We identified 495 facilities that offered both telehealth and all three MOUD medication types (methadone, buprenorphine, naltrexone) in 2023, clustered in the eastern United States. We identified a statistically significant 3-way interaction (p < 0.0001), indicating that telehealth in facilities that did not offer MOUD shifted from more telehealth in rural facilities in earlier years to more telehealth in urban facilities in later years. CONCLUSIONS: Treatment facilities that offer both telehealth and all three MOUD medication types may improve access for hard-to-reach populations. We stress the importance of continued health system strengthening and technological resources in vulnerable rural communities, while acknowledging a changing landscape of increased OUD incidence and MOUD demand in urban communities.

4.
bioRxiv ; 2024 Apr 23.
Artículo en Inglés | MEDLINE | ID: mdl-38712061

RESUMEN

Primary microRNA (pri-miRNA) transcripts are processed by the Microprocessor, a protein complex that includes the ribonuclease Drosha and its RNA binding partner DGCR8/Pasha. We developed a live, whole animal, fluorescence-based sensor that reliably monitors pri-miRNA processing with high sensitivity in C. elegans. Through a forward genetic selection for alleles that desilence the sensor, we identified a mutation in the conserved G residue adjacent to the namesake W residue of Pasha's WW domain. Using genome editing we also mutated the W residue and reveal that both the G and W residue are required for dimerization of Pasha and proper assembly of the Microprocessor. Surprisingly, we find that the WW domain also facilitates nuclear localization of Pasha, which in turn promotes nuclear import or retention of Drosha. Furthermore, depletion of Pasha or Drosha causes both components of the Microprocessor to mislocalize to the cytoplasm. Thus, Pasha and Drosha mutually regulate each other's spatial expression in C. elegans.

5.
J Interpers Violence ; : 8862605241246000, 2024 Apr 11.
Artículo en Inglés | MEDLINE | ID: mdl-38605583

RESUMEN

Violence against women (VAW) is a significant public health and human rights issue, with an estimated 736 million women globally experiencing VAW. Consistent evidence demonstrates that substance use is associated with VAW and that participation in substance use treatment programs is associated with reduction in substance use-related violence. While evidence demonstrates the ability to address VAW through substance use treatment programs, less attention has been paid to geographic access to substance use programs. If these programs are geographically inaccessible, particularly to marginalized populations, many people will not get the help they need. This study seeks to explore the relationship between geographic access to substance use treatment programs on VAW. Using data from the HIV Prevention Trials Network (HPTN) 064 study, longitudinal multilevel models were used to assess the relationship between neighborhood-level social determinants, with a specific focus on geographic access to Substance Abuse and Mental Health Services Administration (SAMHSA) certified drug and alcohol treatment programs and VAW. The study included 1910 women, ages 18 to 44, living in select geographic areas with high-ranked prevalence of HIV and poverty. The findings of this study indicate that among women who reside in census tracts with high prevalence rates of HIV: (1) substance use increases VAW; (2) VAW decreases as geographic access to SAMHSA-certified drug and alcohol treatment facilities increases; and (3) when looking at specific types of VAW, emotional and physical abuse decreases as geographic access to substance use treatment increases. Policies and programs to increase access to substance use treatment should be explored and evaluated, and more programs are needed that address the intersectionality of substance use and VAW.

6.
Artículo en Inglés | MEDLINE | ID: mdl-38193943

RESUMEN

PURPOSE: We sought to identify trends and characteristics associated with the availability of tailored mental health services for individuals involved in the criminal justice system and ordered to treatment by a court, nationally in the US and by state. METHODS: We used National Mental Health Services Survey to identify outpatient mental health treatment facilities in the US (2016 n = 4744; 2018 n = 4626; 2020 n = 4869). We used clustered multiple logistic regression to identify changes over time as well as facility- and state-level factors associated with the availability of specialty court-ordered services. RESULTS: Slightly more than half of the outpatient mental health treatment facilities offered specialized services for individuals ordered to treatment by a court, with wide variation between states. Nationally, there was a significant increase in the odds of offering court-ordered treatment in 2020 compared to 2016 (aOR = 1.16, 95% CI = 1.06-1.27, p < 0.01). Notable associations included offering integrated substance use treatment (versus none, aOR = 2.95, 95% CI = 2.70-3.22, p < 0.0001) and offering trauma therapy (versus none, aOR = 2.05, 95% CI = 1.85-2.27, p < 0.0001). CONCLUSION: The availability of mental health services for individuals ordered to treatment by a court is growing nationally but several states are lagging behind. Court ordered treatment is a promising strategy to improve health and reduce reliance on the carceral system as a healthcare provider. At the same time, we express caution around disparities within behavioral health courts and advocate for equity in access to incarceration alternatives.

7.
Community Ment Health J ; 60(2): 272-282, 2024 02.
Artículo en Inglés | MEDLINE | ID: mdl-37436527

RESUMEN

The integration of multiple ancillary services into mental health treatment settings may improve outcomes, but there are no national studies addressing whether comprehensive services are distributed equitably. We investigated whether the availability of a wide range of service types differs based on the facility's racial/ethnic composition. We used the 2020 National Mental Health Services Survey to identify twelve services offered in outpatient mental health treatment facilities (N = 1,074 facilities). We used logistic regression to model each of the twelve services, predicted by the percentage of a facility's clientele that was White, Black, and Hispanic, adjusted for covariates. Facilities with the highest proportions of Black and Hispanic clientele demonstrated the lowest predicted probabilities of offering comprehensive and integrated services. Our findings offer context around upstream factors that may, in part, drive treatment disparities. We orient our findings around frameworks of structural racism and inequities in mental healthcare.


Asunto(s)
Servicios de Salud Mental , Salud Mental , Humanos , Disparidades en Atención de Salud , Hispánicos o Latinos , Hospitales Psiquiátricos , Grupos Raciales , Estados Unidos , Blanco , Negro o Afroamericano
8.
J Clin Transl Sci ; 7(1): e43, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36845312

RESUMEN

Introduction: The USA has higher rates of preterm birth and incarceration than any other developed nation, with rates of both being highest in Southern states and among Black Americans, potentially due to rurality and socioeconomic factors. To test our hypothesis that prior-year county-level rates of jail admission, economic distress, and rurality were positively associated with premature birth rates in the county of delivery in 2019 and that the strength of these associations is greater for Black women than for White or Hispanic women, we merged five datasets to perform multivariable analysis of data from 766 counties across 12 Southern/rural states. Methods: We used multivariable linear regression to model the percentage of babies born premature, stratified by Black (Model 1), Hispanic (Model 2), and White (Model 3) mothers. Each model included all three independent variables of interest measured using data from the Vera Institute, Distressed Communities Index, and Index of Relative Rurality. Results: In fully fitted stratified models, economic distress was positively associated with premature births among Black (F = 33.81, p < 0.0001) and White (F = 26.50, p < 0.0001) mothers. Rurality was associated with premature births among White mothers (F = 20.02, p < 0.0001). Jail admission rate was not associated with premature births among any racial group, and none of the study variables were associated with premature births among Hispanic mothers. Conclusions: Understanding the connections between preterm birth and enduring structural inequities is a necessary scientific endeavor to advance to later translational stages in health-disparities research.

9.
J Racial Ethn Health Disparities ; 10(3): 1025-1034, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-35391714

RESUMEN

Early in the COVID-19 vaccine rollout, Black adults consistently reported more hesitancy than White adults, but few studies have examined variation in hesitancy among Black adults or its associations with racial discrimination. Data were collected from Black Arkansas residents age 18 and older (n = 350) between July 12th and July 30th, 2021, as part of a larger survey of Arkansans (N = 1500). Participants were recruited through random digit dialing of both landline and cell phones, with oversampling of Black and Hispanic residents. Respondents reported COVID-19 vaccine hesitancy, sociodemographic information, influenza vaccination history, pandemic-related experiences, and experiences of racial discrimination. Almost half (48.9%) of Black adults in Arkansas were not hesitant towards COVID-19 vaccines, while the remainder reported some level of hesitancy. Nearly a quarter were very hesitant (22.4%), while fewer reported being somewhat (14.0%) and a little (14.7%) hesitant. Using an ordered logistic regression with partial proportional odds, we find odds of COVID-19 vaccine hesitancy decreased as age and influenza vaccination increased. Odds of COVID-19 vaccine hesitancy were 1.70 times greater for Black adults who experienced the death of a close friend/family member due to COVID-19 and 2.61 times greater for individuals reporting discrimination with police or in the courts. Within-group analysis revealed nearly half of Black adults did not report any COVID-19 vaccine hesitancy and heterogeneity among those who were hesitant. Findings suggest there may be an important link between racial discrimination in the criminal justice system and COVID-19 vaccine hesitancy among Black adults.


Asunto(s)
Población Negra , Vacunas contra la COVID-19 , COVID-19 , Vacilación a la Vacunación , Adolescente , Adulto , Humanos , Arkansas/epidemiología , Población Negra/psicología , Población Negra/estadística & datos numéricos , COVID-19/epidemiología , COVID-19/prevención & control , COVID-19/psicología , Vacunas contra la COVID-19/uso terapéutico , Gripe Humana , Vacilación a la Vacunación/etnología , Vacilación a la Vacunación/psicología , Vacilación a la Vacunación/estadística & datos numéricos , Racismo Sistemático/etnología , Racismo Sistemático/psicología , Racismo Sistemático/estadística & datos numéricos , Jurisprudencia , Aplicación de la Ley
10.
Prev Med Rep ; 31: 102074, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36466305

RESUMEN

Vaccination is a critical preventive measure to reduce COVID-19 health risks. We utilize full information maximum likelihood (FIML) logistic regression to analyze COVID-19 vaccine hesitancy in a national sample of United States (US) adults (N = 2,022). Online survey data was collected between September 7th and October 3rd, 2021. Before weighting, the racial composition of the sample was as follows: Asian American (15.0 %), Black/African American (20.0 %), Hispanic/Latino (20.0 %), American Indian or Alaska Native (12.6 %), Native Hawaiian or Pacific Islander (12.5 %), and White (20.0 %). Informed by the Increasing Vaccination Model (IVM), we assessed the relationship between COVID-19 vaccine hesitancy and experiences of racial discrimination (Krieger's 9-item measure). Odds of COVID-19 vaccine hesitancy were greater for most younger age groups, women (OR = 1.96; 95 % CI[1.54, 2.49]), Black/African American respondents (OR = 1.68; 95 % CI[1.18, 2.39]), those with a high school education or less (OR = 1.46; 95 % CI[1.08, 1.98]), Independent (OR = 1.77; 95 % CI[1.34, 2.35]) or Republican political affiliation (OR = 2.69; 95 % CI[1.92, 3.79]), and prior COVID-19 infection (OR = 1.78; 95 % CI[1.29, 2.45]). Odds of COVID-19 vaccine hesitancy were 1.04 greater for every-one unit increase in lifetime experiences of racial discrimination (95 % CI[1.02, 1.05]). Odds of COVID-19 vaccine hesitancy were lower for Asian American respondents (OR = 0.682; 95 % CI[0.480, 0.969]), and those who had a primary care doctor had reduced odds of COVID-19 vaccine hesitancy (OR = 0.735; 95 % CI[0.542, 0.998). Our primary finding provides support for a link between experiences of racial discrimination and hesitancy towards a COVID-19 vaccine among US adults. We discuss implications for public health officials and future research.

11.
Drug Alcohol Depend ; 237: 109535, 2022 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-35714531

RESUMEN

BACKGROUND: Methamphetamine use disorder has increased rapidly in the past decade. Injecting is also increasing and has multifaceted implications for disease severity, overall health, and treatment outcomes, but less is known about where or among whom injecting has shifted the most. This national study assessed temporal changes in the preferred route of methamphetamine administration by race/ethnicity and within urban/rural geographies. METHODS: We used the Treatment Episode Dataset-Discharges (2010-2019) to identify outpatient treatment cases who reported methamphetamine as their primary drug of choice at admission (N = 531,799; 2010 n = 33,744; 2019 n = 81,885). We created a combined variable indicating race/ethnicity and the rural/urban location of treatment, and used logistic regression to model the predicted probability of cases reporting injection, smoking, or snorting as their preferred route of administration. We included an interaction term to determine differences over time (race/ethnicity/rurality*year). RESULTS: Across all years, smoking methamphetamine was the most common route of administration (66%), followed by injection (24%) and snorting (10%). Over time and among most sub-groups, the rates of injection increased while the rates of smoking decreased. Compared to 2010, the odds of injecting methamphetamine in 2019 were highest among Black cases in urban areas (aOR = 2.30, 95% CI = 1.76-3.00, p < 0.0001). CONCLUSION: Increasing methamphetamine injection was most pronounced among Black treatment cases in more urban areas, which is in contrast to the longstanding narrative that methamphetamine is a White and rural drug. Methamphetamine prevention, treatment, and harm reduction should target populations with high injection prevalence and growing incidence.


Asunto(s)
Metanfetamina , Etnicidad , Humanos , Prevalencia , Población Rural , Fumar
12.
Subst Use Misuse ; 57(6): 867-875, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35232321

RESUMEN

Purpose: Homeless opioid treatment clients who transition into housing generally demonstrate better outcomes, but housing environments vary widely and may not benefit racial/ethnic minority populations equally. We sought to identify how race/ethnicity moderates the association between positive opioid treatment response and moving into dependent or independent living environments. Methods: We used the Treatment Episode Dataset-Discharges (2018-2019) to identify outpatient treatment clients who were homeless at admission and indicated heroin or other opioids as their primary drug of choice (n = 20,021). We defined positive treatment response as a reduction in opioid use between admission and discharge. We used multivariable logistic regression to model treatment response. We included an interaction between housing at discharge (remained homeless [reference], dependent living, or independent living) and race/ethnicity, and adjusted for relevant confounders. Results: Transitioning from homeless to dependent living was positively associated with treatment response among White (aOR = 3.57, 95% CI = 3.15-4.06), Hispanic (aOR = 2.11, 95% CI = 1.55-2.86), and Black clients (aOR = 1.79, 95% CI = 1.41-2.27), but no association was observed for homeless American Indian/Alaska Native clients. Transitioning from homeless to independent living was strongly associated with treatment response among all groups with the strongest association observed among White clients (aOR = 4.70, 95% CI = 4.26-5.19). Conclusions: Interventions aimed at improving OUD treatment outcomes among homeless clients should identify individual and structural factors that support moving into fully housed and independent living environments. Dependent living offers needed support during crises, but should be temporary and priority should be placed on independent, permanent, and autonomous living environments.


Asunto(s)
Analgésicos Opioides , Personas con Mala Vivienda , Analgésicos Opioides/uso terapéutico , Etnicidad , Vivienda , Humanos , Grupos Minoritarios
13.
Cell Rep ; 37(10): 110101, 2021 12 07.
Artículo en Inglés | MEDLINE | ID: mdl-34879267

RESUMEN

Piwi-interacting RNAs (piRNAs) regulate many biological processes through mechanisms that are not fully understood. In Caenorhabditis elegans, piRNAs intersect the endogenous RNA interference (RNAi) pathway, involving a distinct class of small RNAs called 22G-RNAs, to regulate gene expression in the germline. In the absence of piRNAs, 22G-RNA production from many genes is reduced, pointing to a role for piRNAs in facilitating endogenous RNAi. Here, however, we show that many genes gain, rather than lose, 22G-RNAs in the absence of piRNAs, which is in some instances coincident with RNA silencing. Aberrant 22G-RNA production is somewhat stochastic but once established can occur within a population for at least 50 generations. Thus, piRNAs both promote and suppress 22G-RNA production and gene silencing. rRNAs and histones are hypersusceptible to aberrant silencing, but we do not find evidence that their misexpression is the primary cause of the transgenerational sterility observed in piRNA-defective mutants.


Asunto(s)
Proteínas Argonautas/genética , Proteínas de Caenorhabditis elegans/genética , Caenorhabditis elegans/genética , Mutación , Interferencia de ARN , ARN de Helminto/genética , ARN Ribosómico/genética , ARN Interferente Pequeño/genética , Transcripción Genética , Animales , Animales Modificados Genéticamente , Proteínas Argonautas/metabolismo , Caenorhabditis elegans/metabolismo , Proteínas de Caenorhabditis elegans/metabolismo , Histonas/genética , Histonas/metabolismo , Modelos Genéticos , ARN de Helminto/metabolismo , ARN Ribosómico/metabolismo , ARN Interferente Pequeño/metabolismo , Procesos Estocásticos
14.
Subst Abuse Treat Prev Policy ; 16(1): 50, 2021 06 19.
Artículo en Inglés | MEDLINE | ID: mdl-34147098

RESUMEN

BACKGROUND: Opioid treatment programs (OTPs) are the primary source of medication-assisted treatment (MAT) for many individuals with opioid use disorder, including poor and uninsured patients and those involved in the criminal justice (CJ) system. Substance use treatment services that are tailored to the unique needs of patients often produce better outcomes, but little national research has addressed characteristics associated with whether OTPs offer services specifically tailored to community members involved in the CJ system. Medicaid expansion under the Affordable Care Act has broadly strengthened MAT services, but the role of expansion in supporting MAT services that are specifically tailored towards CJ-involved populations remains unknown. Moreover, it is unknown whether the availability of tailored services varies between Medicaid expansion states. METHODS: We used the 2019 National Survey of Substance Abuse Treatment Services to identify OTPs in the US (n = 1679) and whether they offered services specifically tailored for CJ-involved patients. We used logistic regression to model the association between OTPs offering tailored services and state Medicaid expansion status, adjusted for state-level opioid overdose and community supervision rates. RESULTS: Nationally, only a quarter of OTPs offered services tailored to CJ populations, and the majority of OTPs (73%) were located in Medicaid expansion states. Compared to OTPs in non-expansion states, OTPs in expansion states demonstrated nearly double the odds of offering tailored services (adjusted odds ratio = 1.90, 95% confidence interval = 1.41-2.57, p < 0.0001). The predicted probability of offering tailored services varied by state; probability estimates for all expansion states were above the national mean, and estimates for all non-expansion states were below the national mean. CONCLUSION: Our findings reiterate the role of Medicaid in promoting the adoption of comprehensive OTP services for CJ-involved populations. However, the proportion of OTPs that offered tailored services was relatively low, pointing to the need to continually strengthen Medicaid services and coverage.


Asunto(s)
Analgésicos Opioides , Trastornos Relacionados con Opioides , Prisioneros , Analgésicos Opioides/uso terapéutico , Derecho Penal , Accesibilidad a los Servicios de Salud , Humanos , Medicaid , Trastornos Relacionados con Opioides/tratamiento farmacológico , Patient Protection and Affordable Care Act , Estados Unidos
15.
Elife ; 102021 02 15.
Artículo en Inglés | MEDLINE | ID: mdl-33587037

RESUMEN

Piwi-interacting RNAs (piRNAs) play essential roles in silencing repetitive elements to promote fertility in metazoans. Studies in worms, flies, and mammals reveal that piRNAs are expressed in a sex-specific manner. However, the mechanisms underlying this sex-specific regulation are unknown. Here we identify SNPC-1.3, a male germline-enriched variant of a conserved subunit of the small nuclear RNA-activating protein complex, as a male-specific piRNA transcription factor in Caenorhabditis elegans. SNPC-1.3 colocalizes with the core piRNA transcription factor, SNPC-4, in nuclear foci of the male germline. Binding of SNPC-1.3 at male piRNA loci drives spermatogenic piRNA transcription and requires SNPC-4. Loss of snpc-1.3 leads to depletion of male piRNAs and defects in male-dependent fertility. Furthermore, TRA-1, a master regulator of sex determination, binds to the snpc-1.3 promoter and represses its expression during oogenesis. Loss of TRA-1 targeting causes ectopic expression of snpc-1.3 and male piRNAs during oogenesis. Thus, sexually dimorphic regulation of snpc-1.3 expression coordinates male and female piRNA expression during germline development.


Asunto(s)
Proteínas de Caenorhabditis elegans/metabolismo , Caenorhabditis elegans/metabolismo , Proteínas de Unión al ADN/metabolismo , ARN Interferente Pequeño/metabolismo , Factores de Transcripción/metabolismo , Animales , Caenorhabditis elegans/genética , Caenorhabditis elegans/crecimiento & desarrollo , Proteínas de Caenorhabditis elegans/genética , Proteínas de Unión al ADN/genética , Femenino , Regulación de la Expresión Génica , Regulación del Desarrollo de la Expresión Génica , Células Germinativas/crecimiento & desarrollo , Células Germinativas/metabolismo , Masculino , ARN Interferente Pequeño/genética , Especificidad de la Especie , Espermatogénesis , Factores de Transcripción/genética
16.
Nucleic Acids Res ; 48(4): 1811-1827, 2020 02 28.
Artículo en Inglés | MEDLINE | ID: mdl-31872227

RESUMEN

Piwi-interacting RNAs (piRNAs) and small interfering RNAs (siRNAs) are distinct classes of small RNAs required for proper germline development. To identify the roles of piRNAs and siRNAs in regulating gene expression in Caenorhabditis elegans, we subjected small RNAs and mRNAs from the gonads of piRNA and siRNA defective mutants to high-throughput sequencing. We show that piRNAs and an abundant class of siRNAs known as WAGO-class 22G-RNAs are required for proper expression of spermatogenic and oogenic genes. WAGO-class 22G-RNAs are also broadly required for transposon silencing, whereas piRNAs are largely dispensable. piRNAs, however, have a critical role in controlling histone gene expression. In the absence of piRNAs, histone mRNAs are misrouted into the nuclear RNAi pathway involving the Argonaute HRDE-1, concurrent with a reduction in the expression of many histone mRNAs. We also show that high-level gene expression in the germline is correlated with high level 22G-RNA production. However, most highly expressed genes produce 22G-RNAs through a distinct pathway that presumably involves the Argonaute CSR-1. In contrast, genes targeted by the WAGO branch of the 22G-RNA pathway are typically poorly expressed and respond unpredictably to loss of 22G-RNAs. Our results point to broad roles for piRNAs and siRNAs in controlling gene expression in the C. elegans germline.


Asunto(s)
Proteínas Argonautas/genética , Proteínas de Caenorhabditis elegans/genética , ARN Interferente Pequeño/genética , Animales , Caenorhabditis elegans/genética , Caenorhabditis elegans/crecimiento & desarrollo , Regulación del Desarrollo de la Expresión Génica/genética , Silenciador del Gen , Células Germinativas/crecimiento & desarrollo , Secuenciación de Nucleótidos de Alto Rendimiento , Histonas/genética , Interferencia de ARN , ARN Bicatenario/genética , ARN Mensajero/genética , Transcriptoma/genética
17.
Cell Rep ; 29(10): 3187-3199.e4, 2019 12 03.
Artículo en Inglés | MEDLINE | ID: mdl-31801082

RESUMEN

The germline contains an immortal cell lineage that ensures the faithful transmission of genetic and, in some instances, epigenetic information from one generation to the next. Here, we show that in Caenorhabditis elegans, the small RNA 3'-2'-O-methyltransferase henn-1/HEN1 is required for sustained fertility across generations. In the absence of henn-1, animals become progressively less fertile, becoming sterile after ∼30 generations at 25°C. Sterility in henn-1 mutants is accompanied by severe defects in germline proliferation and maintenance. The requirement for henn-1 in transgenerational fertility is likely due to its role in methylating and, thereby, stabilizing Piwi-interacting RNAs (piRNAs). However, despite being essential for piRNA stability in embryos, henn-1 is not required for piRNA stability in adults. Thus, we propose that methylation is important for the role of piRNAs in establishing proper gene silencing during early stages of development but is dispensable for their role in the proliferated germline.


Asunto(s)
Proteínas de Caenorhabditis elegans/genética , Caenorhabditis elegans/genética , Células Germinativas/fisiología , Metiltransferasas/genética , Proteínas del Tejido Nervioso/genética , Animales , Proliferación Celular/genética , Silenciador del Gen/fisiología , Metilación , ARN Interferente Pequeño/genética
18.
Health Sci Rep ; 2(5): e118, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-31139757

RESUMEN

BACKGROUND AND AIMS: Infection with high-risk (HR) genotypes of the human papillomavirus (HPV) is necessary for and causative of almost all cervical cancers and their precursor condition, cervical intraepithelial neoplasia. These conditions have been sharply reduced by cervical cytology screening, and a further decrease is expected because of the recent introduction of prophylactic HPV vaccinations. While significant attention has been given to gynecologic HPV disease, men can be affected by HPV-related cancers of the anus, penis, and oropharynx. This literature review aims to address disparities in HPV-related disease in men, and certain HR male subpopulations, compared with women. DISCUSSION: Overall, immunocompetent men are far less likely than women to develop anogenital HPV-related cancers, despite harboring HR HPV infections at anogenital sites. On the other hand, men who have sex with men and men living with human immunodeficiency virus infection are at considerably higher risk of HPV-related disease. Historic rates of prophylactic HPV vaccination in males have trailed those of females due to numerous multilevel factors, although, in recent years, this sex gap in vaccination coverage has been closing. In the absence of routine HPV screening in males, therapeutic vaccinations have emerged as a potential treatment modality for preinvasive neoplasia and are in various phases of clinical testing. CONCLUSION: Successful reductions in HPV disease morbidity at the population level must acknowledge and target HPV infections in men.

19.
J Int AIDS Soc ; 22(3): e25247, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30869200

RESUMEN

INTRODUCTION: Limited data exist on acceptability of candidate pre-exposure prophylaxis (PrEP) regimens among US women. We evaluated PrEP experiences, attitudes and future use intentions among sexually active women who completed the US-based HIV Prevention Trials Network 069/AIDS Clinical Trials Group 5305 study. METHODS: Women participated in the study between March 2013 and November 2015. We analysed computer-assisted self-interview (CASI) surveys among 130 women and conducted in-depth interviews among a subset of 26 women from three sites. Interviews were conducted in mid/late-2015. RESULTS: Most women (57%) reported very good/excellent PrEP adherence on CASI, although 21% acknowledged over-reporting adherence at least some of the time. Commitment to preventing HIV infection, a sense of ownership of the study, and keeping pills stored in a visible location facilitated adherence. Adherence barriers included "simply forgetting" and being away from home. Most women interviewed did not intend to use PrEP in the future because of lack of perceived need due to their own (as opposed to their partners') low-risk behaviour and concerns about affordability - but not because of side effects or other characteristics of the regimens. DISCUSSION: Improving HIV prevention options for US women will require access to affordable PrEP as well as expanding women's understanding of relationship- and community-level factors that increase their risk of acquiring HIV.


Asunto(s)
Fármacos Anti-VIH/administración & dosificación , Infecciones por VIH/prevención & control , Adolescente , Adulto , Femenino , Infecciones por VIH/psicología , Humanos , Intención , Masculino , Persona de Mediana Edad , Profilaxis Pre-Exposición , Estudios Prospectivos , Asunción de Riesgos , Parejas Sexuales/psicología , Encuestas y Cuestionarios , Estados Unidos , Mujeres/psicología , Adulto Joven
20.
J Fam Violence ; 34(7): 601-609, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-32595265

RESUMEN

BACKGROUND: Fractures associated with intimate partner violence (IPV) are devastating injuries that can have lifelong implications. With exception to the facial region, there are very limited epidemiological reports describing the types and location of IPV-related fractures. The objective of this study is to review a national database and describe trends associated with IPV-related fractures. METHODS: An analysis of all adults was performed using the National Trauma Data Bank from 2007 through 2014.Data including demographics, age, location of fracture, and drug/alcohol use were described and analyzed. FINDINGS: There were 1,352 records identified where the patient was diagnosed with an IPV-related fracture. Women accounted for 83% of the population and the mean age was 37.5 years. Approximately 30% of the population was diagnosed with vertebral, trunk, and rib fractures. Variances among fracture location were observed across age groups. Facial fractures were recorded more in the younger population (18-39 years) when compared to other age groups (40-59 years; 60+ years), p<0.0001. Alternatively, rib and femur fractures were more common among survivors aged 60+ when compared to the younger age groups, p<0.0001. INTERPRETATION: The ability to identify and respond to survivors of IPV in the healthcare setting is critically important. While facial fractures are common, they are not the only type of fractures that are seen. In many cases, healthcare professionals are the first line of defense in identifying suspected IPV cases. The findings of this paper build upon existing literature while also describing IPV-related fractures across the age spectrum.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA