Publications by authors named "Luz Reyes"

Background: Few evidence-based interventions have been successfully scaled up and sustained long-term. Within an implementation trial testing strategies for scale-up of the Systems Navigation and Psychosocial Counseling (SNaP) intervention for people who inject drugs (PWID) with HIV across HIV testing clinics in Vietnam, we sought to assess if the implementation of SNaP was sustained after study support ended and to identify factors, including adaptations, that affected SNaP sustainment.

Method: Across all 42 SNaP clinics, we surveyed clinic staff at 6-10 months post-study completion to assess SNaP sustainment.

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Attack of donor tissues by pre-formed anti-pig antibodies is well known to cause graft failure in xenotransplantation. Genetic engineering of porcine donors to eliminate targets of these pre-formed antibodies coupled with advances in immunosuppressive medicines have now made it possible to achieve extended survival in the pre-clinical pig-to-non-human primate model. Despite these improvements, antibodies remain a risk over the lifetime of the transplant, and many patients continue to have pre-formed donor-specific antibodies even to highly engineered pigs.

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Prolonged survival in preclinical renal xenotransplantation demonstrates that early antibody mediated rejection (AMR) can be overcome. It is now critical to evaluate and understand the pathobiology of late graft failure and devise new means to improve post xenograft outcomes. In renal allotransplantation the most common cause of late renal graft failure is transplant glomerulopathy-largely due to anti-donor MHC antibodies, particularly anti-HLA DQ antibodies.

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Pig liver xenotransplantation is limited by a thrombocytopenic coagulopathy that occurs immediately following graft reperfusion. In vitro and ex vivo studies from our lab suggested that the thrombocytopenia may be the result of a species incompatibility in platelet glycosylation. Realization that platelet α-granules contain antibodies caused us to reevaluate whether the thrombocytopenia in liver xenotransplantation could occur because IgM and IgG from inside platelet α-granules bound to pig liver sinusoidal endothelial cells (LSECs).

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Introduction: Food insecurity is associated with the development of substance misuse and use disorders (SUD). This study sought to estimate associations between state Supplemental Nutrition Assistance Program (SNAP) eligibility policies and substance-related outcomes.

Methods: 2014-2017 SNAP Policy Database and 2015-2019 National Survey on Drug Use and Health state-level estimates were used to estimate associations between state SNAP eligibility policies and alcohol use disorder (AUD), opioid misuse, illicit drug use disorder (IDUD), SUD, and needing but not receiving SUD treatment.

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Introduction: Food insecurity is associated with an increased likelihood of interpersonal violence. The Supplemental Nutrition Assistance Program (SNAP) is the largest program addressing food insecurity in the U.S.

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Organ supply remains inadequate to meet the needs of many patients who could benefit from allotransplantation. Xenotransplantation, the use of animals as organ donors, provides an opportunity to alleviate this challenge. Pigs are widely accepted as the ideal organ donor, but humans and nonhuman primates have strong humoral immune responses to porcine tissue.

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Article Synopsis
  • The study explores the lack of guidance on implementing male-focused sexual and relationship violence prevention programs and aims to improve evaluation methods.
  • Through 20 interviews with leaders from community-based organizations and educational institutions, the research identifies strategies for engaging male participants in these programs.
  • Key findings highlight the necessity of addressing the specific needs of program participants, their parents or guardians, and the organizations hosting these programs.
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Background: Children exposed to intimate partner violence (IPV) between caregivers are at an increased risk of becoming involved in dating violence during adolescence. However, to date, few adolescent dating violence (ADV) prevention programs have been developed for and evaluated with youth exposed to IPV. An exception is Moms and Teens for Safe Dates (MTSD), an evidence-based ADV prevention program for mothers or maternal caregivers (mothers) exposed to IPV and their teenagers.

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The goal of this manuscript is to advance HIV risk behavior prevention efforts for South African adolescent girls by identifying distinct trajectory patterns across multiple behavioral domains for adolescent and young adults. We draw from a sample of N = 1070 adolescent girls from South Africa who were between the ages of 13-15 at baseline. Participants were followed across 6 waves of data collection between 2011 and 2019.

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Objective: Pig-to-primate renal xenotransplantation is plagued by early antibody-mediated graft loss which precludes clinical application of renal xenotransplantation. We evaluated whether temporary complement inhibition with anti-C5 antibody Tesidolumab could minimize the impact of early antibody-mediated rejection in rhesus monkeys receiving pig kidneys receiving costimulatory blockade-based immunosuppression.

Methods: Double (Gal and Sda) and triple xenoantigen (Gal, Sda, and SLA I) pigs were created using CRISPR/Cas.

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Background And Aims: Evidence suggests that alcohol reduction interventions decrease intimate partner violence (IPV) perpetration, although this remains untested in low- and middle-income countries and among men with human immunodeficiency virus (HIV). This study evaluates the effectiveness of alcohol reduction counseling interventions on IPV perpetration among men on anti-retroviral therapy (ART) and tests whether alcohol use explains the intervention effects.

Design: Secondary analysis of data from a three-arm randomized controlled trial among ART patients with hazardous alcohol use.

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Background: While the link between alcohol use and male-perpetrated intimate partner violence (IPV) has been well-established, research is needed to test whether psychosocial factors interact with alcohol use to exacerbate IPV perpetration. We tested whether depressive symptoms influenced the strength and/or direction of the alcohol-IPV relationship among men with HIV in Vietnam.

Methods: This study is a secondary analysis using data from a randomized controlled trial conducted in Thai Nguyen, Vietnam.

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In this paper, we explored the presence of GATA in Entamoeba histolytica and their function as regulators of phagocytosis-related genes. Bioinformatics analyses evidenced a single 579 bp sequence encoding for a protein (EhGATA), smaller than GATA factors of other organisms. EhGATA appeared phylogenetically close to Dictyostelium discoideum and Schistosoma mansoni GATA proteins.

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HIV incidence rates in South Africa are extremely high, particularly postpartum. However, there is limited knowledge of women's HIV risk behavior postpartum. Women in age-disparate relationships may be less able to negotiate safe sex postpartum than women whose partners are similar ages because they have less relationship power.

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Background: Alcohol use is a known risk factor for male-perpetrated intimate partner violence (IPV), although few studies have been conducted globally and among men with HIV (MWH). We estimated the longitudinal effects of alcohol use on IPV perpetration among MWH.

Methods: This study is a secondary analysis of randomized controlled trial data among male and female antiretroviral treatment patients with hazardous alcohol use in Thai Nguyen, Vietnam.

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Background: Coronary dilatation is the most important complication of Kawasaki disease (KD) and, in addition to some clinical characteristics, is common to KD and febrile exanthematous illnesses (FEIs).

Objective: To assess whether children with FEI, who do not meet the criteria for KD, have changes in coronary arteries dimensions.

Methods: Echocardiography was performed within the first two weeks of the disease in patients < 10 years with fever and exanthema without other KD criteria.

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Article Synopsis
  • Scientists want to use pig organs to help people who need organ transplants, but human bodies usually attack these pig organs.
  • They found that certain proteins in pigs, called swine leukocyte antigens (SLA), make it hard for the human immune system to accept the organs.
  • By changing these SLA proteins slightly, researchers hope they can make pig organs safer for humans to use without losing the pig's ability to fight off its own diseases.
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Background: Highly sensitized patients are difficult to match with suitable renal allograft donors and may benefit from xenotransplant trials. We evaluate antibody binding from sensitized patients to pig cells and engineered single allele cells to identify anti-human leukocyte antigen (HLA) antibody cross-species reactivity with swine leukocyte antigen (SLA). These novel testing strategies assess HLA/SLA epitopes and antibody-binding patterns and introduce genetic engineering of SLA epitopes.

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Background: Dating and relationship violence (DRV)-intimate partner violence during adolescence-encompasses physical, sexual and emotional abuse. DRV is associated with a range of adverse health outcomes including injuries, sexually transmitted infections, adolescent pregnancy and mental health issues. Experiencing DRV also predicts both victimisation and perpetration of partner violence in adulthood.

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HIV-positive women who engage in postpartum unsafe sex are at risk for sexually transmitted infection (STI), unintended pregnancy, and secondary transmission of HIV to uninfected partners. One factor that may increase risk for postpartum unsafe sex among HIV-positive women is intimate partner violence (IPV) victimization; few studies, however, have examined this association. This longitudinal study examined whether patterns of psychological, physical, and sexual IPV, assessed during pregnancy, predicted unsafe sex at 14 weeks postpartum among South African women diagnosed as HIV-positive during pregnancy (n = 561).

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Desert springs are critical for wildlife and human subsistence, but poorly studied. The springs in the northern Chihuahuan Desert region of Mexico are no exception. While groundwater overexploitation and other anthropogenic activities have endangered these waters, little is known about their water quality or biodiversity.

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Objective: Xenotransplantation using pig organs could end the donor organ shortage for transplantation, but humans have xenoreactive antibodies that cause early graft rejection. Genome editing can eliminate xenoantigens in donor pigs to minimize the impact of these xenoantibodies. Here we determine whether an improved cross-match and chemical immunosuppression could result in prolonged kidney xenograft survival in a pig-to-rhesus preclinical model.

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