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1.
Inorg Chem ; 60(12): 9181-9191, 2021 Jun 21.
Artigo em Inglês | MEDLINE | ID: mdl-34096303

RESUMO

Functional neutral metal-organic frameworks (MOFs) {[M(5OH-IP)(L)]}n [M = Zn(II) for ADES-4; Cd(II) for ADES-5; 5OH-IP = 5-hydroxyisophthalate; L = (E)-N'-(pyridin-3-ylmethylene)nicotinohydrazide) have been synthesized by a diffusion/conventional reflux/mechanochemical method and characterized by various analytical techniques. Crystals were harvested by a diffusion method, and single-crystal X-ray diffraction (SXRD) analysis revealed that an adjacent [M2(COO)2]n ladder chain generates isostructural two-dimensional network motifs by doubly pillaring via L. The bulk-phase purity of ADES-4 and ADES-5 synthesized by a versatile synthetic approach has been recognized by the decent match of powder X-ray diffraction patterns with the simulated one. Both ADES-4 and ADES-5 showed selective adsorption of cationic dyes methylene blue (MB), methyl violet (MV), and rhodamine B (RhB) over anionic dye methyl orange (MO) from water with good uptake and rapid adsorption. Utilization of ADES-4 as a chromatographic column filler for adsorptive removal of individual cationic dyes as well as a mixture of dyes has been demonstrated from the aqueous phase. Interestingly, ADES-4 is reusable with good stability, and it showed a dye desorption phenomenon in methanol. The probable mechanism of cationic dye removal based on insight from structural information and plausible supramolecular interactions has also been explored. Both MOFs also showed efficient catalytic transformation of fructose and glucose into the high-value chemical intermediate 5-hydroxymethylfurfural of industrial significance.

2.
J Child Sex Abus ; 30(4): 498-508, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33879040

RESUMO

The natural fading of memory presents a difficulty for complainants who report childhood sexual abuse after a significant delay. The complainant's recollections, and their failures to recollect, may be the only source of evidence about the alleged offense and so may be determinative of outcome. We analyzed 101 published judicial decisions of timely tried and delayed complaints of child sexual abuse and coded for judge's comments related to complainants' memory failures. We utilized qualitative and quantitative methods for this study. There were more memory failure comments reported for cases with a delay to trial compared to no delay to trial. Further, there were more memory failure comments in cases that ended in acquittals than convictions when there was a delay to trial. Judicial discussion of memory failures about abuse setting or circumstances accounted for the highest percentage of comments.


Assuntos
Abuso Sexual na Infância , Maus-Tratos Infantis , Criança , Humanos
3.
AIDS Care ; 30(12): 1605-1613, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30114936

RESUMO

We sought to integrate a brief computer and counseling support intervention into the routine practices of HIV clinics and evaluate effects on patients' viral loads. The project targeted HIV patients in care whose viral loads exceeded 1000 copies/ml at the time of recruitment. Three HIV clinics initiated the intervention immediately, and three other HIV clinics delayed onset for 16 months and served as concurrent controls for evaluating outcomes. The intervention components included a brief computer-based intervention (CBI) focused on antiretroviral therapy adherence; health coaching from project counselors for participants whose viral loads did not improve after doing the CBI; and behavioral screening and palm cards with empowering messages available to all patients at intervention clinics regardless of viral load level. The analytic cohort included 982 patients at intervention clinics and 946 patients at control clinics. Viral loads were assessed at 270 days before recruitment, at time of recruitment, and +270 days later. Results indicated that both the control and intervention groups had significant reductions in viral load, ending with approximately the same viral level at +270 days. There was no evidence that the CBI or the targeted health coaching was responsible for the viral reduction in the intervention group. Results may stem partially from statistical regression to the mean in both groups. Also, clinical providers at control and intervention clinics may have taken action (e.g., conversations with patients, referrals to case managers, adherence counselors, mental health, substance use specialists) to help their patients reduce their viral loads. In conclusion, neither a brief computer-based nor targeted health coaching intervention reduced patients' viral loads beyond levels achieved with standard of care services available to patients at well-resourced HIV clinics.


Assuntos
Aconselhamento , Infecções por HIV/virologia , Carga Viral , Adulto , Fármacos Anti-HIV/uso terapêutico , Feminino , Infecções por HIV/tratamento farmacológico , Infecções por HIV/psicologia , Humanos , Masculino , Adesão à Medicação , Pessoa de Meia-Idade
5.
Dalton Trans ; 53(26): 11165-11176, 2024 Jul 02.
Artigo em Inglês | MEDLINE | ID: mdl-38895998

RESUMO

Developing synthetic strategies for smart materials for the adsorption and separation of toxic chemicals is of great importance. Metal-organic frameworks (MOFs) have been proven to be outstanding adsorbent materials that possess excellent pollutant removal performances in wastewater treatment, including dye recycling. In this work, a neutral Cd(II) based 2D framework with a dual ligand strategy involving -OH functionalized 5-hydroxyisophthalic acid (5-OH-H2IPA) and the amide decorated Schiff base ligand (E)-N'-(pyridin-4-ylmethylene)isonicotinohydrazide (L) has been synthesized by different synthetic routes and characterized by various analytical methods. Thus, crystals of {[Cd(5-OH-IPA)(L)]·CH3OH}n synthesized via diffusion (ADES-7D) and the phase pure bulk product synthesized by conventional reflux (ADES-7C) and the mechanochemical grinding method (ADES-7M) have been established using PXRD data of the respective product showing identical simulated SXRD data to those of ADES-7D. The mechanochemically synthesized ADES-7M possesses a better surface area and CO2 adsorption capability compared to ADES-7C, which is also supported by electron microscopy and particle size measurements. Furthermore, ADES-7 can be used as an efficient adsorbent material for the reversible, selective adsorption (42-99%) and separation of the cationic dyes malachite green (MG), methyl violet (MV), methylene blue (MB), and rhodamine B (RhB) from the mixture of cationic/anionic dyes (methyl orange (MO) and bromocresol green (BCG)) in the aqueous phase. Specifically, ADES-7M possesses better dye capture capability compared to ADES-7C, even in the case of the bigger dye RhB with adsorption differences of 2.38 to 1.01 mg g-1, respectively. The dye adsorption kinetics follows pseudo-second-order kinetics, and the dye adsorption isotherm fits well with the Langmuir/Freundlich adsorption isotherm models. The probable mechanism of adsorption involving the supramolecular interaction between the host MOF and the guest dye has also been proposed.

6.
J Chromatogr A ; 1714: 464555, 2024 Jan 11.
Artigo em Inglês | MEDLINE | ID: mdl-38091714

RESUMO

The objective of this study was to evaluate the efficiency of nematodes in zooremediation of chlorpyrifos (CPF), an organophosphate pesticide. The nematode population Acrobeloides maximus (A. maximus) was employed for bioremediation, converting CPF into non-toxic residues. Optimal growth conditions for mass production of A. maximus were achieved by maintaining a temperature of 25 °C, pH 8, and supplementing the culture medium with plant nutrients. The nematodes were then immobilized within sodium alginate beads. The efficacy of the degradation process was assessed using various analytical techniques, including UV-Visible spectroscopy, HPTLC, FTIR, and LC-MS, confirming the successful breakdown of CPF. The bioreactor demonstrated a complete degradation efficiency of CPF exceeding 99%. Additionally, LC-MS analysis was conducted to elucidate the degradation pathway based on the formation of intermediates. These results underscore the potential of A. maximus as a sustainable organism for addressing environmental contamination arising from CPF pesticide.


Assuntos
Clorpirifos , Inseticidas , Praguicidas , Clorpirifos/química , Biodegradação Ambiental , Compostos Organofosforados
7.
ACS Appl Bio Mater ; 6(5): 1915-1933, 2023 05 15.
Artigo em Inglês | MEDLINE | ID: mdl-37083301

RESUMO

The delivery and accumulation of therapeutic drugs into cancer cells without affecting healthy cells are a major challenge for antitumor therapy. Here, we report the synthesis of a liposomal hybrid gold nano-assembly with enhanced photothermal activity for lung cancer treatment. The core components of the nano-assembly include gold nanorods coated with a mesoporous silica shell that offers an excellent drug-loading surface for encapsulation of doxorubicin. To enhance the photothermal capacity of nano-assembly, IR 780 dye was loaded inside a thermo-sensitive liposome, and then, the core nano-assembly was wrapped within the liposome, and GE-11 peptide and folic acid were conjugated onto the surface of the liposome to give the final nano-assembly [(GM@Dox) LI]-PF. The dual targeting approach of [(GM@Dox) LI]-PF leads to enhanced cellular uptake and improves the accumulation of nano-assemblies in cancer cells that overexpress the epidermal growth factor receptor and folate. The exposure of near-infrared laser irradiation can trigger photothermal-induced structural disruption of the nano-assembly, which allows for the precise and controllable release of Dox at targeted sites. Additionally, chemo-photothermal therapy was shown to be 11 times more effective in cancer cell treatment when compared to Dox alone. Our systematic study suggests that the nano-assemblies facilitate the cancer cells undergoing apoptosis via an intrinsic mitochondrial pathway that can be directly triggered by the chemo-photothermal treatment. This study offers an appealing candidate that holds great promise for synergistic cancer treatment.


Assuntos
Carcinoma , Hipertermia Induzida , Neoplasias Pulmonares , Humanos , Lipossomos , Terapia Fototérmica , Ouro/química , Neoplasias Pulmonares/tratamento farmacológico , Doxorrubicina , Pulmão , Carcinoma/tratamento farmacológico
8.
ACS Omega ; 8(38): 34481-34498, 2023 Sep 26.
Artigo em Inglês | MEDLINE | ID: mdl-37779923

RESUMO

Nanoparticles have been suggested as drug-delivery systems for chemotherapeutic drugs to allow for controlled drug release profiles and selectivity to target cancer cells. In addition, nanoparticles can be used for the in situ generation and amplification of reactive oxygen species (ROS), which have been shown to be a promising strategy for cancer treatment. Thus, a targeted nanoscale drug-delivery platform could be used to synergistically improve cancer treatment by the action of chemotherapeutic drugs and ROS generation. Herein, we propose a promising chemotherapy strategy where the drug-loaded nanoparticles generate high doses of ROS together with the loaded ROS-generating chemotherapeutic drugs, which can damage the mitochondria and activate cell death, potentiating the therapeutic outcome in cancer therapy. In the present study, we have developed a dual-targeted drug-delivery nanoassembly consisting of a mesoporous silica core loaded with the chemotherapeutic, ROS-generating drug, paclitaxel (Px), and coated with a liposome layer for controlled drug release. Two different lung cancer-targeting ligands, folic acid and peptide GE11, were used to target the overexpressed nonsmall lung cancer receptors to create the final nanoassembly (MSN@Px) L-GF. Upon endocytosis by the cancer cells, the liposome layer was degraded by the intracellular lipases, and the drug was rapidly released at a rate of 65% within the first 20 h. In vitro studies confirmed that this nanoassembly was 8-fold more effective in cancer therapy compared to the free drug Px.

9.
J Mol Model ; 29(5): 161, 2023 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-37115321

RESUMO

CONTEXT: The persistent spread of highly contagious COVID-19 disease is one of the deadliest occurrences in the history of mankind. Despite the distribution of numerous efficacious vaccines and their extensive usage, the perpetual effectiveness of immunization is being catechized. Therefore, discovering an alternative therapy to control and prevent COVID-19 infections has become a top priority. The main protease (Mpro) plays a key role in viral replication, making it an intriguing pharmacological target for SARS-CoV-2. METHODS: In this context, virtual screening of thirteen bioactive polyphenols and terpenoids of Rosmarinus officinalis L. was performed using several computational modules including molecular docking, ADMET, drug-likeness characteristics, and molecular dynamic simulation to predict the potential inhibitors against SARS-CoV-2 Mpro (PDB: 6LU7). The results suggest that apigenin, betulinic acid, luteolin, carnosol, and rosmarinic acid may emerge as potential inhibitors of SARS-CoV-2 with acceptable drug-likeness, pharmacokinetics, ADMET characteristics, and binding interactions comparable with remdesivir and favipiravir. These findings imply that some of the active components of Rosmarinus officinalis L. can serve as an effective antiviral source for the development of therapeutics for SARS-CoV-2 infection.


Assuntos
COVID-19 , Rosmarinus , Bioprospecção , Simulação de Acoplamento Molecular , SARS-CoV-2 , Antivirais/farmacologia , Simulação de Dinâmica Molecular , Inibidores de Proteases/farmacologia
10.
Trauma Violence Abuse ; 23(2): 428-443, 2022 04.
Artigo em Inglês | MEDLINE | ID: mdl-32930064

RESUMO

The primary aim of this systematic review and meta-analysis was to examine the prevalence of technology-facilitated sexual violence (TFSV) within the adolescent and adult population regarding victimization and perpetration. In addition to the primary aim, associated health outcomes with TFSV were discussed through a qualitative lens. Specific forms of TFSV that were examined include distribution of, production of, and threats to distribute sexual material involving another individual without that person's consent via images or videos; 425 articles from MEDLINE, PsycArticles, PsycINFO, Criminal Justice Abstracts, ProQuest Dissertations & Theses, and Google Scholar were screened. Nineteen articles (comprising 20 independent samples) reporting prevalence rates of TFSV on 32,247 participants were included in this random-effects meta-analysis. Pooled prevalence of victimization results revealed that 8.8% of people have had their image or video-based sexts shared without consent, 7.2% have been threatened with sext distribution, and 17.6% have had their image taken without permission. Regarding perpetration, 12% have shared sexts beyond the intended recipient, 2.7% have threatened to share sexts, and 8.9% have nonconsensually taken an image. Moderator variables included publication year, mean participant age, proportion of female participants, and study setting, with meta-regression analyses revealing no significant predictors. Finally, a qualitative analysis of nine articles (n = 3,990) was conducted to assess mental health associations with TFSV victimization, revealing significant mental health impacts, including anxiety, depression, and poor coping, for victims.


Assuntos
Bullying , Vítimas de Crime , Delitos Sexuais , Adolescente , Adulto , Vítimas de Crime/psicologia , Feminino , Humanos , Prevalência , Tecnologia
11.
Cureus ; 14(11): e31604, 2022 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-36540490

RESUMO

Gigantism and acromegaly are most commonly caused by a growth hormone (GH)-secreting pituitary adenoma. Pediatric cases are diagnostically and therapeutically challenging due to their insidious nature. This article presents two adolescent females who were referred to the endocrinology clinic primarily for the evaluation of menstrual disorders rather than for concerns about GH excess. Patient one was a 16-year-old who presented with primary amenorrhea and tall stature, and patient two, a 15-year-old, presented with a history of irregular menstruation. Both patients were noted to have acromegalic features, and an extensive work-up confirmed GH-secreting pituitary adenomas. In addition, patient two had significant hyperprolactinemia. Transsphenoidal tumor resection was performed on both patients; patient one had a successful complete resection and achieved endocrine remission, while patient two underwent partial resection followed by a short clinical trial of pegvisomant without significant success. Improved clinical knowledge through case reports can assist with the early diagnosis and management of such rare pediatric conditions.

12.
ACS Appl Bio Mater ; 3(10): 6708-6721, 2020 Oct 19.
Artigo em Inglês | MEDLINE | ID: mdl-35019336

RESUMO

Pseudomonas aeruginosa (PA) is an opportunistic pathogen, which causes serious lung infections in immunocompromised patients. Traditional oral intake of large quantities of small-molecule antibiotics to treat bacterial infections leads to off-target toxicity and development of drug-resistant species. Improved delivery systems of antibiotics to the targeted site of bacterial infections would help reduce the need for a high intake of antibiotics. Colistin (Col), an antibacterial peptide, is considered the last resort treatment for multidrug resistant (MDR)-PA. To approach the problem of development of antibacterial resistance and off-target toxicity due to the use of excessive amounts of antibiotics, we have designed a targeted drug delivery nanoassembly, which delivers antibiotics to extracellular and intracellular bacteria. The nanoassembly is composed of (1) drug (Col)-loaded mesoporous silica (MSN) core (Col@MSN), (2) liposomal shell (Col@MSN@LL), and (3) PA-targeting LL-37 peptide (Col@MSN@LL-(LL-37)). The liposomal shell prevents premature drug release before the nanoassembly approaches the targeted bacteria. The liposome bilayer degrades upon excreted lipase present in the local environment of PA, releasing encapsulated Col. There is a significant increase in Col release (∼90% release within 40 h) in the presence of bacteria compared to the absence of bacteria (only ∼75% release after 80 h). A 6.7-fold increase in the antimicrobial efficacy of Col encapsulated in Col@MSN@LL-(LL-37) was seen compared to free Col. All studies were done using a clinical strain of PA14. Col@MSN@LL-(LL-37) successfully targets and inhibits intracellular PA14 within the lung epithelial cells. Only 7% PA14 viability is seen after treating the lung epithelial cells with Col@MSN@LL-(LL-37). No significant cytotoxicity was observed with Col@MSN@LL-(LL-37). Therefore, this discussed lipid-coated targeted nanoassembly can be considered as a successful antibiotic delivery platform.

13.
Artigo em Inglês | MEDLINE | ID: mdl-32723263

RESUMO

The article has been withdrawn by the Editorial office of the journal Anti-Cancer Agents in Medicinal Chemistry because of the lack of clarity and obscurity in the content regarding language. Bentham Science apologizes to the readers of the journal for any inconvenience this may have caused. The Bentham Editorial Policy on Article Withdrawal can be found at https://benthamscience.com/editorial-policiesmain.php Bentham Science Disclaimer: It is a condition of publication that manuscripts submitted to this journal have not been published and will not be simultaneously submitted or published elsewhere. Furthermore, any data, illustration, structure or table that has been published elsewhere must be reported, and copyright permission for reproduction must be obtained. Plagiarism is strictly forbidden, and by submitting the article for publication the authors agree that the publishers have the legal right to take appropriate action against the authors, if plagiarism or fabricated information is discovered. By submitting a manuscript, the authors agree that the copyright of their article is transferred to the publishers if and when the article is accepted for publication.

14.
AIDS Patient Care STDS ; 32(4): 157-164, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29630849

RESUMO

Current guidelines specify that visit intervals with viral monitoring should not exceed 6 months for HIV patients. Yet, gaps in care exceeding 6 months are common. In an observational cohort using US patients, we examined the association between gap length and changes in viral load status and sought to determine the length of the gap at which significant increases in viral load occur. We identified patients with gaps in care greater than 6 months from 6399 patients from six US HIV clinics. Gap strata were >6 to <7, 7 to <8, 8 to <9, 9 to <12, and ≥12 months, with viral load measurements matched to the opening and closing dates for the gaps. We examined visit gap lengths in association with two viral load measurements: continuous (log10 viral load at gap opening and closing) and dichotomous (whether patients initially suppressed but lost viral suppression by close of the care gap). Viral load increases were nonsignificant or modest when gap length was <9 months, corresponding to 10% or fewer patients who lost viral suppression. For gaps ≥12 months, there was a significant increase in viral load as well as a much larger loss of viral suppression (in 23% of patients). Detrimental effects on viral load after a care gap were greater in young patients, black patients, and those without private health insurance. On average, shorter gaps in care were not detrimental to patient viral load status. HIV primary care visit intervals of 6 to 9 months for select patients may be appropriate.


Assuntos
Fármacos Anti-HIV/uso terapêutico , Continuidade da Assistência ao Paciente/estatística & dados numéricos , Infecções por HIV/tratamento farmacológico , Infecções por HIV/virologia , Seguro Saúde/estatística & dados numéricos , Atenção Primária à Saúde , Adulto , Negro ou Afro-Americano , Estudos de Coortes , Feminino , Guias como Assunto , Infecções por HIV/epidemiologia , Humanos , Masculino , Pessoa de Meia-Idade , Testes Sorológicos , Fatores de Tempo , Estados Unidos , Carga Viral , Adulto Jovem
15.
Ticks Tick Borne Dis ; 7(1): 46-53, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26296588

RESUMO

Salp15, a 15-kDa salivary gland protein plays an important role in tick blood-feeding and transmission of Borrelia burgdorferi, the causative agent of Lyme borreliosis. The comparative studies reveal that Salp15 is a genetically conserved protein across various Ixodes species. In this study, we have identified a Salp15 homolog, designated as Iaff15, from Ixodes affinis ticks that are the principal enzootic vectors of B. burgdorferi sensu stricto in the southeastern part of the United States. Comparison of the annotated amino acid sequences showed that Iaff15 share 81% homology with I. sinensis Salp15 homolog and 64% homology with I. scapularis Salp15. Phylogenetic analysis revealed that Iaff15 come within the same clade with I. sinensis, I. scapularis, and I. pacificus Salp15 homologs. The bioinformatics analysis of the posttranslational modifications prediction revealed that all the Salp15 family members contain glycosylation sites. In addition, Iaff15 carried a higher number of Casein Kinase II phosphorylation sites in comparison to the other Salp15 family members. Collectively, high sequence conservation distributed over the entire amino acids sequence not only suggests an important role for Iaff15 in I. affinis blood feeding and vector-pathogen interactions but may also lead to the development of an anti-vector vaccine against this group of ticks.


Assuntos
Biologia Computacional , Ixodes/metabolismo , Proteínas e Peptídeos Salivares/imunologia , Infestações por Carrapato/veterinária , Vacinas/imunologia , Sequência de Aminoácidos , Animais , Sequência de Bases , Clonagem Molecular , Feminino , Regulação da Expressão Gênica , Dados de Sequência Molecular , Família Multigênica , Filogenia , Processamento de Proteína Pós-Traducional , Glândulas Salivares/metabolismo , Proteínas e Peptídeos Salivares/metabolismo , Alinhamento de Sequência , Especificidade da Espécie , Infestações por Carrapato/prevenção & controle
16.
Int J Adolesc Med Health ; 29(5)2016 Feb 27.
Artigo em Inglês | MEDLINE | ID: mdl-26926858

RESUMO

Internet-based interventions to prevent depression during adolescence have been implemented in Western countries, but there is a lack of research about its adaptation for use in other countries. Project Competent Adulthood Transition with Cognitive-Behavioral, Humanistic and Interpersonal Training (CATCH-IT) is an Internet-based intervention targeting teens at risk for developing depression. This study explored cultural adaptation of the intervention for use in Mainland China. A pilot study using the English version of CATCH-IT was conducted in Wuhan, China, with adolescents from the Wuhan School of Medicine in 2013. Participants completed a feedback survey to evaluate the format and socio-cultural relevance for each component of the intervention. Twenty students were surveyed (age range 19-23 years). In 2014, Chinese physicians evaluated CATCH-IT and completed a feedback questionnaire. Data obtained were collected and analyzed for recurrent themes. Both groups recommended new modules focusing on Chinese-relevant themes like pressure for academic excellence, filial piety, and balancing school and social life. Physicians agreed to retain the cognitive behavior therapy (CBT) and behavioral activation (BA) modules, and were split on the use of interpersonal therapy (IPT). All experts recommended translation of the content into Mandarin and a majority suggested interactive features and less text. All agreed the Internet serves well as a delivery model; however, dissemination through schools was preferred. The results support cultural adaptation of basic facets of the intervention like language and visuals, and also deeper aspects like IPT and the delivery model. Development of an adaptation should build upon the findings from this study and work to maintain fidelity.

17.
J Acquir Immune Defic Syndr ; 73(2): 205-12, 2016 10 01.
Artigo em Inglês | MEDLINE | ID: mdl-27105049

RESUMO

BACKGROUND: The HIV continuum of care paradigm uses a single viral load test per patient to estimate the prevalence of viral suppression. We compared this single-value approach with approaches that used multiple viral load tests to examine the stability of suppression. METHODS: The retrospective analysis included HIV patients who had at least 2 viral load tests during a 12-month observation period. We assessed the (1) percent with suppressed viral load (<200 copies/mL) based on a single test during observation, (2) percent with suppressed viral loads on all tests during observation, (3) percent who maintained viral suppression among patients whose first observed viral load was suppressed, and (4) change in viral suppression status comparing first with last measurement occasions. Prevalence ratios compared demographic and clinical subgroups. RESULTS: Of 10,942 patients, 78.5% had a suppressed viral load based on a single test, whereas 65.9% were virally suppressed on all tests during observation. Of patients whose first observed viral load was suppressed, 87.5% were suppressed on all subsequent tests in the next 12 months. More patients exhibited improving status (13.3% went from unsuppressed to suppressed) than worsening status (5.6% went from suppressed to unsuppressed). Stable suppression was less likely among women, younger patients, black patients, those recently diagnosed with HIV, and those who missed ≥1 scheduled clinic visits. CONCLUSIONS: Using single viral load measurements overestimated the percent of HIV patients with stable suppressed viral load by 16% (relative difference). Targeted clinical interventions are needed to increase the percent of patients with stable suppression.


Assuntos
Infecções por HIV/virologia , Prática de Saúde Pública , Carga Viral , Humanos
18.
Parasit Vectors ; 8: 132, 2015 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-25889484

RESUMO

BACKGROUND: Subolesin is an evolutionary conserved molecule in diverse arthropod species that play an important role in the regulation of genes involved in immune responses, blood digestion, reproduction and development. In this study, we have identified a subolesin ortholog from soft ticks Ornithodoros turicata, the vector of the relapsing fever spirochete in the United States. METHODS: Uninfected fed or unfed O. turicata ticks were used throughout this study. The subolesin mRNA was amplified by reverse transcription polymerase chain reaction (RT-PCR) and sequenced. Quantitative-real time PCR (QRT-PCR) was performed to evaluate subolesin mRNA levels at different O. turicata developmental stages and from salivary glands and gut tissues. Bioinformatics and comparative analysis was performed to predict potential post-translational modifications in O. turicata subolesin amino-acid sequences. RESULTS: Our study reveals that O. turicata subolesin gene expression is developmentally regulated, where; adult ticks expressed significantly higher levels in comparison to the larvae or nymphal ticks. Expression of subolesin was evident in both unfed and fed ticks and in the salivary glands and midgut tissues. The expression of subolesin transcripts varied in fed ticks with peak levels at day 14 post-feeding. Phylogenetic analysis revealed that O. turicata subolesin showed a high degree of sequence conservation with subolesin's from other soft and hard ticks. Bioinformatics and comparative analysis predicted that O. turicata subolesin carry three Protein kinase C and one Casein kinase II phosphorylation sites. However, no myristoylation or glycosylation sites were evident in the O. turicata subolesin sequence. CONCLUSION: Our study provides important insights in recognizing subolesin as a conserved potential candidate for the development of a broad-spectrum anti-vector vaccine to control not only ticks but also several other arthropods that transmit diseases to humans and animals.


Assuntos
Ornithodoros/imunologia , Glândulas Salivares/metabolismo , Sequência de Aminoácidos , Animais , Sequência de Bases , Evolução Molecular , Feminino , Humanos , Masculino , Ornithodoros/genética , Ornithodoros/metabolismo , Filogenia , RNA Mensageiro/genética , Alinhamento de Sequência , Análise de Sequência de DNA
19.
Glob J Health Sci ; 8(1): 72-8, 2015 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-26234990

RESUMO

In many low-income countries, volunteer health advisors (VHAs) play an important role in disseminating information, especially in rural or hard-to-reach locations. When the world's largest outbreak of Ebola virus disease (EVD) occurred in 2014, a majority of cases were concentrated in the West African countries of Guinea, Liberia, and Sierra Leone. Twenty cases were reported in Nigeria initially and there was a need to rapidly disseminate factual information on Ebola virus. In southeast Nigeria, a group of VHAs was being used to implement the Healthy Beginning Initiative [HBI], a congregation based intervention to increase HIV testing among pregnant women and their male partners. The purpose of this study was to assess the baseline and post EVD training knowledge of VHAs during the outbreak in Nigeria. In September 2014, 59 VHAs attending a HBI training workshop in the Enugu State of Nigeria participated in an Ebola awareness training session. Participants completed a 10-item single-answer questionnaire that assessed knowledge of Ebola epidemiology, symptoms, transmission, prevention practices, treatment and survival prior to the Ebola awareness training. After the training, the VHAs repeated the questionnaire. Answers to pre and post questionnaires were analyzed using paired t-tests. Multiple linear regression was used to examine the relationship between pre and post total questionnaire scores and age, education, current location and employment. The average pre-test score was 7.3 and average post-test score was 7.8 which was a significant difference (t=-2.5, p=0.01). Prior to the training, there was a significant difference in Ebola knowledge based on the VHAs education only (p<0.01). After training, education was no longer significant for Ebola knowledge. Existing community health programs can be used as a platform to train VHAs in times of epidemics for quick dissemination of vital health information in areas lacking adequate health infrastructure and personnel.


Assuntos
Agentes Comunitários de Saúde/educação , Surtos de Doenças , Educação em Saúde , Conhecimentos, Atitudes e Prática em Saúde , Doença pelo Vírus Ebola/epidemiologia , Voluntários/educação , Adulto , Avaliação Educacional , Feminino , Humanos , Masculino , Nigéria/epidemiologia , Recursos Humanos
20.
Artigo em Inglês | MEDLINE | ID: mdl-25353556

RESUMO

We report the first experimental observation of extreme multistability in a controlled laboratory investigation. Extreme multistability arises when infinitely many attractors coexist for the same set of system parameters. The behavior was predicted earlier on theoretical grounds, supported by numerical studies of models of two coupled identical or nearly identical systems. We construct and couple two analog circuits based on a modified coupled Rössler system and demonstrate the occurrence of extreme multistability through a controlled switching to different attractor states purely through a change in initial conditions for a fixed set of system parameters. Numerical studies of the coupled model equations are in agreement with our experimental findings.


Assuntos
Eletrônica/instrumentação , Modelos Teóricos , Dinâmica não Linear , Oscilometria/instrumentação , Oscilometria/métodos , Simulação por Computador , Desenho Assistido por Computador , Desenho de Equipamento , Análise de Falha de Equipamento , Retroalimentação
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