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1.
BMC Public Health ; 21(1): 536, 2021 03 19.
Artigo em Inglês | MEDLINE | ID: mdl-33740919

RESUMO

BACKGROUND: Meeting the contraceptive needs of women living with HIV (WLHIV) has primary health benefits for women, in addition to being a key element to prevent mother-to-child HIV transmission. This analysis will estimate the current number of infant HIV infections prevented by contraception in the era of increased HIV treatment coverage and; 2) model the additional HIV benefits of preventing unintended births to WLHIV. METHODS: Secondary data analysis was conducted using publicly available data from the United Nations Programme on HIV/AIDS (UNAIDS) and Population Division, Demographic Health Surveys, and peer-review literature. National data from 70 countries, that had a UNAIDS estimate for the number of WLHIV nationally, were combined into country-level models. Models estimated the current number of infant HIV infections averted by contraception annually and potentially averted if unintended births to WLHIV were prevented. Estimates take into account pregnancy and live birth rates, contraceptive coverage, contraceptive method mix and failure rates, and HIV treatment coverage during pregnancy to prevent mother to child transmission. RESULTS: Contraception use among WLHIV prevents an estimated 43,559 new infant HIV infections annually across 70 countries. Countries with the largest number of infant infections averted by contraception included South Africa (9441), Nigeria (4195), Kenya (3508), Zimbabwe (2586), and India (2145). Preventing unintended births to WLHIV could avert an additional 43,768 new infant infections per year, with the greatest potential gains to be made in South Africa (12,036), Nigeria (2770), Uganda (2552), and the Democratic Republic of the Congo (2324). CONCLUSIONS: Contraception continues to play an integral role in global HIV prevention efforts in the era of increasing HIV treatment coverage, especially in sub-Saharan Africa. Broad contraceptive availability, increased contraceptive voluntarism and method mix are key components to preventing unintended births and ending new infant HIV infections worldwide.


Assuntos
Infecções por HIV , Criança , Anticoncepção , Comportamento Contraceptivo , Serviços de Planejamento Familiar , Feminino , Infecções por HIV/epidemiologia , Infecções por HIV/prevenção & controle , Humanos , Índia , Transmissão Vertical de Doenças Infecciosas/prevenção & controle , Quênia , Nigéria , Gravidez , África do Sul , Uganda , Zimbábue
2.
J Aging Phys Act ; 28(3): 455-466, 2020 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-31810060

RESUMO

The study aims were to analyze the reliability and validity of the GymAware™ linear position transducer's velocity and power measures during the sit-to-stand, compared with the Dartfish 2D videography analysis, and to assess the relationship of age and handgrip strength with velocity and power in 48 older men and women (77.6 ± 11.1 years). The results showed excellent agreement between GymAware- and Dartfish-derived sit-to-stand velocity (intraclass correlation coefficient2-1 = .94 and power intraclass correlation coefficient2-1 = .98) measures. A moderate and negative relationship was found between age and velocity (r = -.62; p < .001) and age and power (r = -.63; p < .001). A moderate and positive relationship was found between handgrip strength and velocity (r = .43; p = .002) and handgrip strength and power (r = .54; p < .001). The results show the GymAware velocity and power measures during the sit-to-stand in older adults to be reliable and valid.

3.
J Strength Cond Res ; 34(6): 1657-1665, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28859012

RESUMO

Yingling, VR, Webb, SL, Inouye, C, O, J, and Sherwood, JJ. Muscle power predicts bone strength in Division II athletes. J Strength Cond Res 34(6): 1657-1665, 2020-The relationship between muscle fitness measures and tibial bone strength in collegiate level athletes was investigated. Eighty-six Division II collegiate athletes (mean ± SD: age: [18-29 years], height: 1.71 m [0.09], mass: 66.7 kg [10.5], 56 female: 30 male) participated in this cross-sectional study. Maximum grip strength (GS), 1 repetition maximum leg press, and vertical jump peak power (PP) tests were measured. Cortical area, cortical bone mineral density (cBMD), moment of inertia, and bone strength (polar strength-strain index) were measured using peripheral quantitative computed tomography at 50% tibia length. For each bone strength parameter, a hierarchical multiple regression analysis was performed to examine the contribution of sex and the 3 muscle fitness parameters (muscle power, relative 1 repetition leg extensor strength, and relative GS) to bone parameters. Vertical jump PP explained 54-59% of the variance in bone strength parameters, and relative leg extensor and GS were not predictive of bone strength parameters. Muscle power correlated with bone mass and architecture variables but not cBMD values. Cortical bone mineral density was also not predicted by relative leg extensor strength or relative GS. Muscular fitness assessment, specifically PP calculated from vertical jump height assessments, provides a simple, objective, valid, and reliable measure to identify and monitor bone strength in collegiate athletes.


Assuntos
Atletas , Densidade Óssea/fisiologia , Força Muscular/fisiologia , Músculo Esquelético/fisiologia , Adolescente , Adulto , Estudos Transversais , Exercício Físico/fisiologia , Feminino , Força da Mão , Humanos , Extremidade Inferior/fisiologia , Masculino , Análise de Regressão , Fatores Sexuais , Tíbia/fisiologia , Adulto Jovem
4.
Am J Public Health ; 108(5): 642-648, 2018 05.
Artigo em Inglês | MEDLINE | ID: mdl-29565661

RESUMO

OBJECTIVES: To assess the impact of the expansion of Medicaid eligibility in the United States on the opioid epidemic, as measured through increased access to opioid analgesic medications and medication-assisted treatment. METHODS: Using Medicaid enrollment and reimbursement data from 2011 to 2016 in all states, we evaluated prescribing patterns of opioids and the 3 Food and Drug Administration-approved medications used in treating opioid use disorders by using 2 statistical models. We used difference-in-differences and interrupted time series models to measure prescribing rates before and after state expansions. RESULTS: Although opioid prescribing per Medicaid enrollee increased overall, we observed no statistical difference between expansion and nonexpansion states. By contrast, per-enrollee rates of buprenorphine and naltrexone prescribing increased more than 200% after states expanded eligibility, while increasing by less than 50% in states that did not expand. Methadone prescribing decreased in all states in this period, with larger decreases in expansion states. CONCLUSIONS: The Medicaid expansion enrolled a population no more likely to be prescribed opioids than the base Medicaid population while significantly increasing uptake of 2 drugs used in medication-assisted treatment.


Assuntos
Analgésicos Opioides , Prescrições de Medicamentos/estatística & dados numéricos , Medicaid , Tratamento de Substituição de Opiáceos , Transtornos Relacionados ao Uso de Opioides/tratamento farmacológico , Analgésicos Opioides/efeitos adversos , Analgésicos Opioides/uso terapêutico , Buprenorfina/uso terapêutico , Definição da Elegibilidade/economia , Definição da Elegibilidade/estatística & dados numéricos , Humanos , Medicaid/economia , Medicaid/estatística & dados numéricos , Naltrexona/uso terapêutico , Tratamento de Substituição de Opiáceos/economia , Tratamento de Substituição de Opiáceos/estatística & dados numéricos , Estudos Retrospectivos , Estados Unidos/epidemiologia
5.
BMC Public Health ; 18(1): 1116, 2018 Sep 12.
Artigo em Inglês | MEDLINE | ID: mdl-30208876

RESUMO

BACKGROUND: The previously-named Mexico City Policy (MCP) - which prohibited non U.S.-based non-governmental organizations (NGOs) from receiving U.S. family planning (FP) funding if they advocated, provided, counseled, or referred clients for abortions, even with non-U.S. funds - was reinstated and expanded in 2017. For the first time, the expanded MCP (EMCP) applies to HIV funding through the President's Emergency Plan for AIDS Relief (PEPFAR) in addition to FP funding. Previous, and more limited, iterations of the policy forced clinic closures and decreased contraceptive access, prompting the need to examine where and how the EMCP may impact FP/HIV service integration. METHODS: The likelihood of FP/HIV service de-integration under the EMCP was quantified using a composite risk index for 31 PEPFAR-funded countries. The index combines six standardized indicators from publically available sources organized into three sub-indexes: 1) The importance of PEPFAR for in-country service delivery of HIV and FP services; 2) The susceptibility of implementing partners to the EMCP; and 3) The integration of FP/HIV funds and programming through PEPFAR and USAID. RESULTS: Countries with the highest overall risk scores included Zambia (3.3) Cambodia (3.2), Uganda (3.1), South Africa (2.9), Haiti (2.8), Lesotho (2.8), Swaziland (2.1), and Burundi (1.5). Zambia's risk score is driven by sub-index 1, having a high proportion of country HIV expenditures provided by PEPFAR (86.3%). Cambodia and Uganda's scores are driven sub-index 3, with both countries reporting 100% of PEPFAR supported HIV delivery sites were providing integrated FP services in 2017. South Africa's risk score is driven by sub-index 2, where roughly 60% of PEPFAR funding is to non U.S.-based NGOs. Of the countries with the highest risk scores, Swaziland, Lesotho, and South Africa, are also in the top quartile of PEPFAR countries for HIV prevalence and unintended pregnancies among young women. CONCLUSION: This analysis highlights where and why the EMCP may have the greatest impact on FP/HIV service integration. The possible disruption of service integration in countries with generalized HIV epidemics highlights significant risks. Researchers, national governments, and non-U.S. funders can consider these risk factors to help target their responses to the EMCP and mitigate potential harms of the policy.


Assuntos
Serviços de Planejamento Familiar/economia , Saúde Global/economia , Infecções por HIV/economia , Política de Saúde/legislação & jurisprudência , Cooperação Internacional/legislação & jurisprudência , Aborto Induzido/legislação & jurisprudência , Países em Desenvolvimento , Serviços de Planejamento Familiar/organização & administração , Feminino , Infecções por HIV/prevenção & controle , Humanos , Gravidez , Risco , Estados Unidos
6.
J Appl Toxicol ; 36(4): 543-53, 2016 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-26817529

RESUMO

Immune cells play an important role in recognizing and removing foreign objects, such as nanoparticles. Among various parameters, surface coatings of nanoparticles are the first contact with biological system, which critically affect nanoparticle interactions. Here, surface coating effects on nanoparticle cellular uptake, toxicity and ability to trigger immune response were evaluated on a human monocyte cell line using iron oxide nanoparticles. The cells were treated with nanoparticles of three types of coatings (negatively charged polyacrylic acid, positively charged polyethylenimine and neutral polyethylene glycol). The cells were treated at various nanoparticle concentrations (5, 10, 20, 30, 50 µg ml(-1) or 2, 4, 8, 12, 20 µg cm(-2)) with 6 h incubation or treated at a nanoparticle concentration of 50 µg ml(-1) (20 µg cm(-2)) at different incubation times (6, 12, 24, 48 or 72 h). Cell viability over 80% was observed for all nanoparticle treatment experiments, regardless of surface coatings, nanoparticle concentrations and incubation times. The much lower cell viability for cells treated with free ligands (e.g. ~10% for polyethylenimine) suggested that the surface coatings were tightly attached to the nanoparticle surfaces. The immune responses of cells to nanoparticles were evaluated by quantifying the expression of toll-like receptor 2 and tumor necrosis factor-α. The expression of tumor necrosis factor-α and toll-like receptor 2 were not significant in any case of the surface coatings, nanoparticle concentrations and incubation times. These results provide useful information to select nanoparticle surface coatings for biological and biomedical applications.


Assuntos
Compostos Férricos/toxicidade , Monócitos/efeitos dos fármacos , Nanopartículas/toxicidade , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Compostos Férricos/química , Humanos , Imunidade Inata/efeitos dos fármacos , Monócitos/citologia , Monócitos/metabolismo , Nanopartículas/química , Polietilenoglicóis/química , Propriedades de Superfície , Receptor 2 Toll-Like/genética , Receptor 2 Toll-Like/metabolismo , Fator de Necrose Tumoral alfa/genética , Fator de Necrose Tumoral alfa/metabolismo
7.
Telemed J E Health ; 22(2): 159-164, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26544032

RESUMO

BACKGROUND: Infants who do not pass their newborn hearing screen require diagnostic follow-up visits but often face access barriers such as travel distance and shortage of pediatric audiologists. Telemedicine (tele-audiology) is a potential solution to provide diagnostic hearing evaluations for families of infants facing access barriers. We determined the feasibility and impact of a tele-audiology program that provided comprehensive diagnostic evaluations to a region with a high lost to follow-up rate among newborns who did not pass their newborn hearing screen. MATERIALS AND METHODS: We evaluated the tele-audiology program using parent and provider surveys to determine the perception of quality and satisfaction of care. We also compared the lost to follow-up rate of the tele-audiology program with the loss to follow-up in the region before the implementation of the program. RESULTS: Twenty-two infants who did not pass their newborn hearing screen were referred to the tele-audiology program for diagnostic evaluation. Among these infants, 59.1% were diagnosed with some form of hearing loss. The mean quality score rated by both parents and providers on the telemedicine interaction was over 6.5 on a 7-point Likert scale. All parents rated the importance of tele-audiology as 7 (extremely important) for their family, whereas the provider rated the mean importance as 6.4 (95% confidence interval, 5.9, 6.9) on a 7-point Likert scale. Almost all parents actively participated or were engaged during history taking and counseling and were comfortable in discussing their child's hearing status remotely over telemedicine. All infants completed their diagnostic evaluation with no loss to follow-up compared with 22% loss to follow-up in the region before the implementation of the program. CONCLUSIONS: Tele-audiology is a feasible solution that reduces the loss to follow-up among infants who do not pass their newborn hearing screen and have access barriers to qualified audiologists for diagnostic evaluations.

9.
BMC Public Health ; 15: 270, 2015 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-25886187

RESUMO

BACKGROUND: Female sex workers (FSW) are a vulnerable population for sexual violence and poor sexual and reproductive health outcomes. Sexual violence against FSW has not been widely studied in The Gambia. This study will report the prevalence of and evaluate the health issues correlated with forced sex perpetrated by clients against FSW in The Gambia, and will secondly aim to inform future research and efforts to improve health outcomes for survivors of violence. METHODS: A cross-sectional survey was administered among 251 FSW accrued through a combination of chain referral and venue-based sampling in The Gambia. Eligibility criteria included being over 16 years old and having exchanged sex for money, goods, or favors in the past 12 months. RESULTS: There is a high prevalence of sexual violence against FSW in The Gambia, with 29% (n = 70) of participants reporting a client forced them to have sex in their lifetime. Women who reported forced sex by a client were more likely to report symptoms of depression (aOR 2.15, CI: 1.10-4.16 p < 0.05), unwanted pregnancy (aOR: 2.69, CI: 1.12-6.49 p < 0.05) and report "no", "difficult" or "somewhat difficult" access to condoms (aOR: 3.31, CI: 1.76-6.26 p < .01) compared to women who did not report forced sex. Client-perpetrated forced sex was also negatively associated with receiving any sexually transmitted infection (STI) test in the past 12 months (aOR: 0.49, CI: .26-.91 p < .05). CONCLUSION: FSW who experience sexual violence by a client are more likely to experience poor sexual, reproductive and mental health outcomes. Responding to sexual violence among FSW, including providing survivors with access to post-exposure prophylaxis, emergency contraception, and mental health services, must be a priority given the prevalence of forced sex and links with poor health outcomes. Efforts to reduce sexual violence against FSW is a vital strategy to improve the health and safety of FSW as well as impact the spread of HIV/STIs in The Gambia.


Assuntos
Vítimas de Crime/psicologia , Saúde Mental , Saúde Reprodutiva , Delitos Sexuais/psicologia , Profissionais do Sexo , Adolescente , Adulto , Estudos Transversais , Feminino , Gâmbia , Acessibilidade aos Serviços de Saúde , Humanos , Pessoa de Meia-Idade , Profilaxia Pós-Exposição , Gravidez , Gravidez não Desejada , Prevalência , Delitos Sexuais/estatística & dados numéricos , Profissionais do Sexo/psicologia , Inquéritos e Questionários , Adulto Jovem
10.
Int J Mol Sci ; 16(10): 24174-93, 2015 Oct 13.
Artigo em Inglês | MEDLINE | ID: mdl-26473847

RESUMO

Increasing use of iron oxide nanoparticles in medicine and environmental remediation has led to concerns regarding exposure of these nanoparticles to the public. However, limited studies are available to evaluate their effects on the environment, in particular on plants and food crops. Here, we investigated the effects of positive (PC) and negative (NC) charged iron oxide (Fe2O3) nanoparticles (IONPs) on the physiology and reproductive capacity of Arabidopsis thaliana at concentrations of 3 and 25 mg/L. The 3 mg/L treated plants did not show evident effects on seeding and root length. However, the 25 mg/L treatment resulted in reduced seedling (positive-20% and negative-3.6%) and root (positive-48% and negative-negligible) length. Interestingly, treatment with polyethylenimine (PEI; IONP-PC coating) also resulted in reduced root length (39%) but no change was observed with polyacrylic acid (PAA; IONP-NC coating) treatment alone. However, treatment with IONPs at 3 mg/L did lead to an almost 5% increase in aborted pollen, a 2%-6% reduction in pollen viability and up to an 11% reduction in seed yield depending on the number of treatments. Interestingly, the treated plants did not show any observable phenotypic changes in overall size or general plant structure, indicating that environmental nanoparticle contamination could go dangerously unnoticed.


Assuntos
Arabidopsis , Compostos Férricos/farmacologia , Germinação/efeitos dos fármacos , Nanopartículas Metálicas/efeitos adversos , Raízes de Plantas/efeitos dos fármacos , Sementes/efeitos dos fármacos , Resinas Acrílicas/farmacologia , Arabidopsis/efeitos dos fármacos , Arabidopsis/embriologia , Arabidopsis/crescimento & desenvolvimento , Transporte Biológico/fisiologia , Exposição Ambiental , Pólen/efeitos dos fármacos , Polietilenoimina/farmacologia , Reprodução/efeitos dos fármacos , Plântula/efeitos dos fármacos
11.
Int J Mol Sci ; 16(12): 30251-68, 2015 Dec 18.
Artigo em Inglês | MEDLINE | ID: mdl-26694381

RESUMO

Iron oxide nanoparticles (NPs) are commonly utilized for biomedical, industrial, and commercial applications due to their unique properties and potential biocompatibility. However, little is known about how exposure to iron oxide NPs may affect susceptible populations such as pregnant women and developing fetuses. To examine the influence of NP surface-charge and dose on the developmental toxicity of iron oxide NPs, Crl:CD1(ICR) (CD-1) mice were exposed to a single, low (10 mg/kg) or high (100 mg/kg) dose of positively-charged polyethyleneimine-Fe2O3-NPs (PEI-NPs), or negatively-charged poly(acrylic acid)-Fe2O3-NPs (PAA-NPs) during critical windows of organogenesis (gestation day (GD) 8, 9, or 10). A low dose of NPs, regardless of charge, did not induce toxicity. However, a high exposure led to charge-dependent fetal loss as well as morphological alterations of the uteri (both charges) and testes (positive only) of surviving offspring. Positively-charged PEI-NPs given later in organogenesis resulted in a combination of short-term fetal loss (42%) and long-term alterations in reproduction, including increased fetal loss for second generation matings (mice exposed in utero). Alternatively, negatively-charged PAA-NPs induced fetal loss (22%) earlier in organogenesis to a lesser degree than PEI-NPs with only mild alterations in offspring uterine histology observed in the long-term.


Assuntos
Desenvolvimento Embrionário/efeitos dos fármacos , Compostos Férricos/toxicidade , Nanopartículas/toxicidade , Efeitos Tardios da Exposição Pré-Natal/patologia , Reprodução/efeitos dos fármacos , Animais , Cesárea , Feminino , Fertilidade/efeitos dos fármacos , Feto/efeitos dos fármacos , Tamanho da Ninhada de Vivíparos , Masculino , Camundongos , Gravidez , Propriedades de Superfície , Testículo/efeitos dos fármacos , Testículo/patologia , Fatores de Tempo , Útero/efeitos dos fármacos , Útero/patologia
12.
Violence Against Women ; : 10778012231177997, 2023 May 31.
Artigo em Inglês | MEDLINE | ID: mdl-37259530

RESUMO

Female sex workers (FSWs) face prevalent violence victimization and alcohol consumption at work, yet the bidirectional pathways between these factors are not well defined. Using cohort data from 232 venue-based FSWs in Pattaya, associations of violence and alcohol use were examined within a time period and prospectively via structural equation models. Within the time period, violence victimization and alcohol use were consistently associated; by contrast, violence was not prospectively associated with FSW alcohol use. Findings define alcohol as an important risk factor for violence in sex work environments. Alcohol safety interventions should be explored as a vital component of FSW violence prevention.

13.
Nanoscale ; 15(7): 3461-3474, 2023 Feb 16.
Artigo em Inglês | MEDLINE | ID: mdl-36723042

RESUMO

Vascular insults can create an inflammatory cascade involving endothelial cell, smooth muscle cell, and macrophage activation which can eventually lead to vascular disease such as atherosclerosis. Several studies have identified microRNA 146a's (miR-146a) anti-inflammatory potential based on its role in regulating the nuclear factor kappa beta (NF-κß) pathway. Therefore, in this study, we introduced exogenous miR-146a encapsulated by liposomes to lipopolysaccharide (LPS) stimulated vascular cells and macrophages to reduce inflammatory responses. First, the miR-146a encapsulated liposomes showed uniform size (radius 96.4 ± 4.22 nm) and round shape, long term stability (at least two months), high encapsulation efficiency (69.73 ± 0.07%), and were well transfected to human aortic endothelial cells (HAECs), human aortic smooth muscle cells (SMCs), and human differentiated monocytes (U937 cells). In addition, we demonstrated that miR-146a encapsulated liposomes reduced vascular inflammation responses in HAECs and SMCs through inhibition of ICAM-1 expression and decreased monocyte adhesion. In macrophages, miR-146a liposome treatment demonstrated decreased production of proinflammatory cytokines, tumor necrosis factor-alpha (TNF-α) and interleukin-1 beta (IL-1ß), as well as reduced oxidized low-density lipoprotein (ox-LDL) uptake and foam cell formation. Thus, based on these results, miR-146a encapsulated liposomes may be promising for reducing vascular inflammation by targeting its multiple associated mediators.


Assuntos
Células Espumosas , MicroRNAs , Humanos , Células Endoteliais/metabolismo , Células Espumosas/metabolismo , Células Espumosas/patologia , Inflamação/metabolismo , Molécula 1 de Adesão Intercelular/metabolismo , Lipossomos , Ativação de Macrófagos , MicroRNAs/genética , MicroRNAs/metabolismo , NF-kappa B/metabolismo
14.
Biomater Res ; 27(1): 34, 2023 Apr 22.
Artigo em Inglês | MEDLINE | ID: mdl-37087537

RESUMO

BACKGROUND: Capsular contracture is a critical complication of silicone implantation caused by fibrotic tissue formation from excessive foreign body responses. Various approaches have been applied, but targeting the mechanisms of capsule formation has not been completely solved. Myofibroblast differentiation through the transforming growth factor beta (TGF-ß)/p-SMADs signaling is one of the key factors for capsular contracture development. In addition, biofilm formation on implants may result chronic inflammation promoting capsular fibrosis formation with subsequent contraction. To date, there have been no approaches targeting multi-facted mechanisms of capsular contracture development. METHODS: In this study, we developed a multi-targeting nitric oxide (NO) releasing bionanomatrix coating to reduce capsular contracture formation by targeting myofibroblast differentiation, inflammatory responses, and infections. First, we characterized the bionanomatrix coating on silicon implants by conducting rheology test, scanning electron microcsopy analysis, nanoindentation analysis, and NO release kinetics evaluation. In addition, differentiated monocyte adhesion and S. epidermidis biofilm formation on bionanomatrix coated silicone implants were evaluated in vitro. Bionanomatrix coated silicone and uncoated silicone groups were subcutaneously implanted into a mouse model for evaluation of capsular contracture development for a month. Fibrosis formation, capsule thickness, TGF-ß/SMAD 2/3 signaling cascade, NO production, and inflammatory cytokine production were evaluated using histology, immunofluorescent imaging analysis, and gene and protein expression assays. RESULTS: The bionanomatrix coating maintained a uniform and smooth surface on the silicone even after mechanical stress conditions. In addition, the bionanomatrix coating showed sustained NO release for at least one month and reduction of differentiated monocyte adhesion and S. epidermidis biofilm formation on the silicone implants in vitro. In in vivo implantation studies, the bionanomatrix coated groups demonstrated significant reduction of capsule thickness surrounding the implants. This result was due to a decrease of myofibroblast differentiation and fibrous extracellular matrix production through inhibition of the TGF-ß/p-SMADs signaling. Also, the bionanomatrix coated groups reduced gene expression of M1 macrophage markers and promoted M2 macrophage markers which indicated the bionanomatrix could reduce inflammation but promote healing process. CONCLUSIONS: In conclusion, the bionanomatrix coating significantly reduced capsular contracture formation and promoted healing process on silicone implants by reducing myfibroblast differentiation, fibrotic tissue formation, and inflammation. A multi-targeting nitric oxide releasing bionanomatrix coating for silicone implant can reduce capsular contracture and improve healing process. The bionanomatrix coating reduces capsule thickness, α-smooth muscle actin and collagen synthesis, and myofibroblast differentiation through inhibition of TGF-ß/SMADs signaling cascades in the subcutaneous mouse models for a month.

15.
ACS Appl Mater Interfaces ; 14(46): 51728-51743, 2022 Nov 23.
Artigo em Inglês | MEDLINE | ID: mdl-36346768

RESUMO

Cardiovascular stent technologies have significantly improved over time. However, their optimal performance remains limited by restenosis, thrombosis, inflammation, and delayed re-endothelialization. Current stent designs primarily target inhibition of neointimal proliferation but do not promote functional arterial healing (pro-healing) in order to restore normal vascular reactivity. The endothelial lining that does develop with current stents appears to have loose intracellular junctions. We have developed a pro-healing nanomatrix coating for stents that enhances healing while limiting neointimal proliferation. This builds on our prior work evaluating the effects of the pro-healing nanomatrix coating on cultures of vascular endothelial cells (ECs), smooth muscle cells (SMCs), monocytes, and platelets. However, when a stent is deployed in an artery, multiple vascular cell types interact, and their interactions affect stent performance. Thus, in our current study, an in vitro vascular double-layer (VDL) system was used to observe stent effects on communication between different vascular cell types. Additionally, we assessed the pro-healing ability and vascular cell interactions after stent deployment in the VDL system and in a rabbit model, evaluating the nanomatrix-coated stent compared to a commercial bare metal stent (BMS) and a drug eluting stent (DES). In vitro results indicated that, in a layered vascular structure, the pro-healing nanomatrix-coated stent could (1) improve endothelialization and endothelial functions, (2) regulate SMC phenotype to reduce SMC proliferation and migration, (3) suppress inflammation through a multifactorial manner, and (4) reduce foam cell formation, extracellular matrix remodeling, and calcification. Consistent with this, in vivo results demonstrated that, compared with commercial BMS and DES, this pro-healing nanomatrix-coated stent enhanced re-endothelialization with negligible restenosis, inflammation, or thrombosis. Thus, these findings indicate the unique pro-healing features of this nanomatrix stent coating with superior efficacy over commercial BMS and DES.


Assuntos
Stents Farmacológicos , Trombose , Animais , Coelhos , Células Endoteliais/metabolismo , Stents , Neointima , Trombose/metabolismo , Inflamação/metabolismo
16.
Biomaterials ; 280: 121254, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34836683

RESUMO

Vascular access is the lifeline for hemodialysis patients and the single most important component of the hemodialysis procedure. Arteriovenous fistula (AVF) is the preferred vascular access for hemodialysis patients, but nearly 60% of AVFs created fail to successfully mature due to early intimal hyperplasia development and poor outward remodeling. There are currently no therapies available to prevent AVF maturation failure. First, we showed the important regulatory role of nitric oxide (NO) on AVF development by demonstrating that intimal hyperplasia development was reduced in an overexpressed endothelial nitric oxide synthase (NOS3) mouse AVF model. This supported the rationale for the potential application of NO to the AVF. Thus, we developed a self-assembled NO releasing nanomatrix gel and applied it perivascularly at the arteriovenous anastomosis immediately following rat AVF creation to investigate its therapeutic effect on AVF development. We demonstrated that the NO releasing nanomatrix gel inhibited intimal hyperplasia formation (more than 70% reduction), as well as improved vascular outward remodeling (increased vein diameter) and hemodynamic adaptation (lower wall shear stress approaching the preoperative level and less vorticity). Therefore, direct application of the NO releasing nanomatrix gel to the AVF anastomosis immediately following AVF creation may enhance AVF development, thereby providing long-term and durable vascular access for hemodialysis.


Assuntos
Fístula Arteriovenosa , Remodelação Vascular , Animais , Fístula Arteriovenosa/terapia , Humanos , Hiperplasia , Camundongos , Óxido Nítrico , Ratos , Roedores
17.
J Int AIDS Soc ; 24 Suppl 3: e25753, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-34189858

RESUMO

INTRODUCTION: The United States President's Emergency Plan for AIDS Relief (PEPFAR) is a large bilateral funder of the global HIV response whose policy decisions on key populations (KPs) programming determine the shape of the key populations' response in many countries. Understanding the size and relative share of PEPFAR funds going to KPs and the connection between PEPFAR's targets and resulting programming is crucial for successfully serving key populations. METHODS: Publicly available PEPFAR budgets for key populations' services were assessed by country and geographical region for all 52 countries with budget data in fiscal year (FY) 2020. For the 23 countries which completed a full planning process in FY 2018 and 2019, PEPFAR targets for HIV testing and treatment initiation for key populations were assessed. Expenditures for KP programming were calculated to determine whether shifts in targets translated into programming. Implementing partners were characterized by the level of specialization using the share of assigned targets made up by KPs. The average target per year and implementing partner was calculated for each KP group and indicator. RESULTS: PEPFAR country KP budgets ranged from US$35,000 to $15.2 million, and the proportion of funding to key populations varied by region, with Eastern and Southern African countries having the lowest proportion. Between FY 2018 and 2019, the KP targets for HIV testing and treatment among KPs increased, whereas expenditures on key populations decreased from US$115.4 to $111.0 million. Of the 11 countries with an increase in HIV testing targets, seven had a decrease in KP expenditures. Of the nine countries with an increase in treatment initiation targets, five had a decrease in KP expenditures. The proportion of targets assigned to partners which do not specialize in key populations increased from FY 2018 to 2019. CONCLUSIONS: Current key population policies have not resulted in a tight connection between targets and expenditures. This includes assigning a large proportion of key populations programming to partners who do not specialize in key populations, which may weaken the performance management role of the targets. These results signal that a new approach to key populations programming is needed.


Assuntos
Infecções por HIV , Teste de HIV , África Subsaariana , Infecções por HIV/diagnóstico , Infecções por HIV/tratamento farmacológico , Gastos em Saúde , Humanos , Cooperação Internacional , Estados Unidos
18.
Transgend Health ; 6(1): 1-4, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33644317

RESUMO

The gender-transformative approach to health promotion in the United States and globally has been central to defining gender as a determinant of health and advancing health programs, services, and policies that respond to gender-based inequities. However, current gender frameworks are built on historical perspectives that center cisgender people's experiences and reinforce the gender binary. This restricted focus does not respond to health inequities experienced by transgender people-to the detriment of health programs, services, and policies. As transgender people's health and rights continue to garner attention in movements across health services and policy spaces, it is crucial for frameworks to be expansively redefined to achieve truly transformative gender equality and equity for all gender identities and expressions.

19.
J Int AIDS Soc ; 24(11): e25837, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-34761871

RESUMO

INTRODUCTION: Trans people are disproportionately impacted by HIV yet have not been adequately prioritized in national HIV responses or policy documents. This review aims to understand the extent of meaningful inclusion of trans people in national strategic plans (NSPs) for HIV/AIDS as an essential step in ensuring that HIV policy aligns with epidemiologic data, and trans-specific programming is funded, implemented and sustained. METHODS: HIV NSPs from 60 countries, across five global regions, were assessed for the level of inclusion of trans populations between January and March 2021. The most recently available NSP for each country, published after 2011, was obtained through publicly accessible online sources or through researcher networks. Data were manually extracted from NSPs using a framework of indicators focusing on trans inclusion in these five major sections of NSPs: (1) narratives; (2) epidemiological data; (3) monitoring and evaluation (M&E) indicators and targets; (4) activities; and (5) budgets. RESULTS AND DISCUSSION: Within all reviewed NSPs, 65.0% (39/60) mentioned trans people in at least one of the five key sections but only 8.3% (5/60) included trans people in all five key sections. Trans people were more commonly mentioned in the background/narratives of NSPs (61.7%, 37/60) but less commonly included NSP activities (38.3%, 23/60), in M&E indicators and targets (23.7%, 14/60), in epidemiological data (20.0% 12/60), and in NSP budgets (13.3%, 8/60). Countries in the Asia and Pacific region most frequently included trans people in all five key sections (38%, 5/13), while no countries in Eastern and Southern Africa included trans people in all NSP sections. CONCLUSIONS: This analysis finds substantial gaps in the inclusion of trans populations in NSPs globally. Results highlight the pressing need for states, technical partners, and international funders to engage with trans communities to improve trans-inclusion in all key sections of NSPs. Trans inclusion in NSPs is an essential step towards reaching the populations most at risk of HIV and ultimately achieving country-level epidemic control.


Assuntos
Síndrome da Imunodeficiência Adquirida , Infecções por HIV , África Austral , Ásia , Infecções por HIV/epidemiologia , Infecções por HIV/prevenção & controle , Humanos , Prevalência
20.
Adv Drug Deliv Rev ; 170: 142-199, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-33428994

RESUMO

Atherosclerosis is a chronic inflammatory disease driven by lipid accumulation in arteries, leading to narrowing and thrombosis. It affects the heart, brain, and peripheral vessels and is the leading cause of mortality in the United States. Researchers have strived to design nanomaterials of various functions, ranging from non-invasive imaging contrast agents, targeted therapeutic delivery systems to multifunctional nanoagents able to target, diagnose, and treat atherosclerosis. Therefore, this review aims to summarize recent progress (2017-now) in the development of nanomaterials and their applications to improve atherosclerosis diagnosis and therapy during the preclinical and clinical stages of the disease.


Assuntos
Aterosclerose , Nanoestruturas , Animais , Aterosclerose/diagnóstico , Aterosclerose/tratamento farmacológico , Humanos , Nanoestruturas/química , Nanoestruturas/uso terapêutico
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