Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 19 de 19
Filtrar
1.
PLoS One ; 19(2): e0297948, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38408060

RESUMO

BACKGROUND: To estimate the effects on pain of two medications (low-dose naltrexone and gabapentin) compared to placebo among people with HIV (PWH) with heavy alcohol use and chronic pain. METHODS: We conducted a pilot, randomized, double-blinded, 3-arm study of PWH with chronic pain and past-year heavy alcohol use in 2021. Participants were recruited in St. Petersburg, Russia, and randomized to receive daily low-dose naltrexone (4.5mg), gabapentin (up to 1800mg), or placebo. The two primary outcomes were change in self-reported pain severity and pain interference measured with the Brief Pain Inventory from baseline to 8 weeks. RESULTS: Participants (N = 45, 15 in each arm) had the following baseline characteristics: 64% male; age 41 years (SD±7); mean 2 (SD±4) heavy drinking days in the past month and mean pain severity and interference were 3.2 (SD±1) and 3.0 (SD±2), respectively. Pain severity decreased for all three arms. Mean differences in change in pain severity for gabapentin vs. placebo, and naltrexone vs. placebo were -0.27 (95% confidence interval [CI] -1.76, 1.23; p = 0.73) and 0.88 (95% CI -0.7, 2.46; p = 0.55), respectively. Pain interference decreased for all three arms. Mean differences in change in pain interference for gabapentin vs. placebo, and naltrexone vs. placebo was 0.16 (95% CI -1.38, 1.71; p = 0.83) and 0.40 (95% CI -1.18, 1.99; p = 0.83), respectively. CONCLUSION: Neither gabapentin nor low-dose naltrexone appeared to improve pain more than placebo among PWH with chronic pain and past-year heavy alcohol use. CLINICAL TRIAL REGISTRATION: ClinicalTrials.gov (NCT4052139).


Assuntos
Transtornos Relacionados ao Uso de Álcool , Dor Crônica , Infecções por HIV , Adulto , Feminino , Humanos , Masculino , Dor Crônica/complicações , Dor Crônica/tratamento farmacológico , Método Duplo-Cego , Gabapentina/uso terapêutico , Infecções por HIV/complicações , Infecções por HIV/tratamento farmacológico , Naltrexona/uso terapêutico , Manejo da Dor , Resultado do Tratamento , Pessoa de Meia-Idade
2.
Glob Public Health ; 19(1): 2296009, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38158724

RESUMO

Stigma that people with HIV who inject drugs experience negatively impacts HIV and substance use care, but stigma's association with sharing injection equipment is not known. This is a cross-sectional analysis of data from two studies of people with HIV reporting drug injection (N = 319) in St. Petersburg, Russia (September 2018-December 2020). We used logistic regression to examine associations between HIV stigma and substance use stigma scores (categorised into quartiles) and past 30-day equipment sharing, adjusting for demographic and clinical characteristics. Secondary analyses examined associations of arrest history and social support with sharing equipment. Almost half (48.6%) of participants reported sharing injection equipment. Among groups who did and did not share, mean HIV stigma (2.3 vs 2.2) and substance use stigma (32 vs 31) scores were similar. Adjusted analyses detected no significant associations between HIV stigma quartiles (global p-value = 0.85) or substance use stigma quartiles (global p-value = 0.51) and sharing equipment. Neither arrest history nor social support were significantly associated with sharing equipment. In this cohort, sharing injection equipment was common and did not vary based on stigma, arrest history, or social support. To reduce equipment sharing, investments in sterile injection equipment access in Russia should be prioritised over interventions to address stigma.


Assuntos
Infecções por HIV , Abuso de Substâncias por Via Intravenosa , Humanos , Infecções por HIV/epidemiologia , Estudos Transversais , Abuso de Substâncias por Via Intravenosa/epidemiologia , Estigma Social , Federação Russa , Uso Comum de Agulhas e Seringas , Assunção de Riscos
3.
Elife ; 122023 09 04.
Artigo em Inglês | MEDLINE | ID: mdl-37664989

RESUMO

Background: The COVID-19 pandemic led to reductions in cervical cancer screening and colposcopy. Therefore, in this mixed methods study we explored perceived pandemic-related practice changes to cervical cancer screenings in federally qualified health centers (FQHCs). Methods: Between October 2021 and June 2022, we conducted a national web survey of clinicians (physicians and advanced practice providers) who performed cervical cancer screening in FQHCs in the United States during the post-acute phase of the COVID-19 pandemic, along with a sub-set of qualitative interviews via video conference, to examine perceived changes in cervical cancer screening practices during the pandemic. Results: A total of 148 clinicians completed surveys; a subset (n=13) completed qualitative interviews. Most (86%) reported reduced cervical cancer screening early in the pandemic, and 28% reported continued reduction in services at the time of survey completion (October 2021- July 2022). Nearly half (45%) reported staff shortages impacting their ability to screen or track patients. Compared to clinicians in Obstetrics/Gynecology/Women's health, those in family medicine and other specialties more often reported reduced screening compared to pre-pandemic. Most (92%) felt that screening using HPV self-sampling would be very or somewhat helpful to address screening backlogs. Qualitative interviews highlighted the impacts of staff shortages and strategies for improvement. Conclusions: Findings highlight that in late 2021 and early 2022, many clinicians in FQHCs reported reduced cervical cancer screening and of pandemic-related staffing shortages impacting screening and follow-up. If not addressed, reduced screenings among underserved populations could worsen cervical cancer disparities in the future. Funding: This study was funded by the American Cancer Society, who had no role in the study's design, conduct, or reporting.


Assuntos
COVID-19 , Neoplasias do Colo do Útero , Estados Unidos/epidemiologia , Gravidez , Humanos , Feminino , Detecção Precoce de Câncer , COVID-19/diagnóstico , COVID-19/epidemiologia , Pandemias , Neoplasias do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/epidemiologia , Emoções
4.
Elife ; 122023 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-37656169

RESUMO

Background: The COVID-19 pandemic led to reductions in cervical cancer screening and colposcopy. Therefore, in this mixed method study we explored perceived pandemic-related practice changes to cervical cancer screenings and colposcopies. Methods: In 2021, a national sample of 1251 clinicians completed surveys, including 675 clinicians who performed colposcopy; a subset (n=55) of clinicians completed qualitative interviews. Results: Nearly half of all clinicians reported they were currently performing fewer cervical cancer screenings (47%) and colposcopies (44% of those who perform the procedure) than before the pandemic. About one-fifth (18.6%) of colposcopists reported performing fewer LEEPs than prior to the pandemic. Binomial regression analyses indicated that older, as well as internal medicine and family medicine clinicians (compared to OB-GYNs), and those practicing in community health centers (compared to private practice) had higher odds of reporting reduced screening. Among colposcopists, internal medicine physicians and those practicing in community health centers had higher odds of reporting reduced colposcopies. Qualitative interviews highlighted pandemic-related care disruptions and lack of tracking systems to identify overdue screenings. Conclusions: Reductions in cervical cancer screening and colposcopy among nearly half of clinicians more than 1 year into the pandemic raise concerns that inadequate screening and follow-up will lead to future increases in preventable cancers. Funding: This study was funded by the American Cancer Society, who had no role in the study's design, conduct, or reporting.


Assuntos
COVID-19 , Neoplasias do Colo do Útero , Estados Unidos/epidemiologia , Humanos , Feminino , Gravidez , Detecção Precoce de Câncer , Neoplasias do Colo do Útero/diagnóstico , Neoplasias do Colo do Útero/epidemiologia , COVID-19/diagnóstico , COVID-19/epidemiologia , Colposcopia , Pandemias
5.
Lancet Reg Health Eur ; 28: 100611, 2023 May.
Artigo em Inglês | MEDLINE | ID: mdl-37180745

RESUMO

Background: People with HIV who inject drugs experience intersecting forms of stigma that adversely impact care access. This RCT aimed to evaluate effects of a behavioral intersectional stigma coping intervention on stigma and care utilization. Methods: We recruited 100 participants with HIV and past-30-day injection drug use at a non-governmental harm reduction organization in St. Petersburg, Russia, and randomized them 1:2 to receive usual services only or an additional intervention of three weekly 2-h group sessions. Primary outcomes were change in HIV and substance use stigma scores at one month after randomization. Secondary outcomes were initiation of antiretroviral treatment (ART), substance use care utilization, and changes in frequency of past-30-days drug injection at six months. The trial was registered as NCT03695393 at clinicaltrials.gov. Findings: Participant median age was 38.1 years, 49% were female. Comparing 67 intervention and 33 control group participants recruited October 2019-September 2020, the adjusted mean difference (AMD) in change in HIV and substance use stigma scores one month after baseline were 0.40, (95% CI: -0.14 to 0.93, p = 0.14) and -2.18 (95% CI: -4.87 to 0.52, p = 0.11), respectively. More intervention participants than control participants initiated ART (n = 13, 20% vs n = 1, 3%, proportion difference 0.17, 95% CI: 0.05-0.29, p = 0.01) and utilized substance use care (n = 15, 23% vs n = 2, 6%, proportion difference 0.17, 95% CI: 0.03-0.31, p = 0.02). The adjusted median difference in change in injecting drug use frequency 6 months after baseline was -3.33, 95% CI: -8.51 to 1.84, p = 0.21). Five not intervention-related serious adverse events (7.5%) occurred in the intervention group, one (3.0%) serious adverse event in the control group. Interpretation: This brief stigma-coping intervention did not change stigma manifestations or drug use behaviors in people with HIV and injection drug use. However, it seemed to reduce stigma's impact as an HIV and substance use care barrier. Funding: R00DA041245, K99DA041245, P30AI042853.

6.
Int J Drug Policy ; 117: 104060, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37210965

RESUMO

BACKGROUND: People who inject drugs (PWID) living with HIV may be disproportionately impacted by pandemic restrictions. This study qualitatively explored the impacts of the SARS-CoV-2 pandemic on PWID with HIV in St. Petersburg, Russia. METHODS: In March and April 2021, we conducted remote, semi-structured interviews with PWID with HIV, health care providers, and harm reductionists. RESULTS: We interviewed 25 PWID with HIV (aged 28-56 years, 46% female) and 11 providers. The pandemic exacerbated economic and psychological challenges experienced by PWID with HIV. Simultaneously, barriers to HIV care access, ART prescription refill and dispensing and police violence, which hindered the health and safety of PWID with HIV, were themselves hindered from normal operations by the pandemic, significantly reducing these burdens. CONCLUSION: Pandemic responses should account for the unique vulnerabilities of PWID with HIV to avoid worsening the structural violence they already experience. Wherever the pandemic decreased structural barriers, such as institutional, administrative, and bureaucratic challenges and state violence enacted by police and other elements of the criminal justice system, such changes should be protected.


Assuntos
COVID-19 , Infecções por HIV , Abuso de Substâncias por Via Intravenosa , Humanos , Feminino , Masculino , Abuso de Substâncias por Via Intravenosa/complicações , Abuso de Substâncias por Via Intravenosa/epidemiologia , Abuso de Substâncias por Via Intravenosa/psicologia , Infecções por HIV/epidemiologia , Infecções por HIV/psicologia , COVID-19/epidemiologia , SARS-CoV-2 , Federação Russa/epidemiologia
7.
Hum Vaccin Immunother ; 19(1): 2181610, 2023 12 31.
Artigo em Inglês | MEDLINE | ID: mdl-36882951

RESUMO

Clinician recommendation remains a critical factor in improving HPV vaccine uptake. Clinicians practicing in federally qualified health centers were surveyed between October 2021 and July 2022. Clinicians were asked how they recommended HPV vaccination for patients aged 9-10, 11-12, 13-18, 19-26, and 27-45 y (strongly recommend, offer but do not recommend strongly, discuss only if the patient initiates the conversation, or recommend against). Descriptive statistics were assessed, and exact binomial logistic regression analyses were utilized to examine factors associated with HPV vaccination recommendation in 9-10-y-old patients. Respondents (n = 148) were primarily female (85%), between the ages of 30-39 (38%), white, non-Hispanic (62%), advanced practice providers (55%), family medicine specialty (70%), and practicing in the Northeast (63%). Strong recommendations for HPV vaccination varied by age: 65% strongly recommended for ages 9-10, 94% for ages 11-12, 96% for ages 13-18, 82% for age 19-26, and 26% for ages 27-45 y. Compared to Women's Health/OBGYN specialty, family medicine clinicians were less likely to recommend HPV vaccination at ages 9-10 (p = .03). Approximately two-thirds of clinicians practicing in federally qualified health centers or safety net settings strongly recommend HPV vaccine series initiation at ages 9-10. Additional research is needed to improve recommendations in younger age groups.


Assuntos
Infecções por Papillomavirus , Vacinas contra Papillomavirus , Humanos , Feminino , Adulto , Infecções por Papillomavirus/prevenção & controle , Vacinação , Conhecimentos, Atitudes e Prática em Saúde , Padrões de Prática Médica , Inquéritos e Questionários
8.
Viruses ; 15(2)2023 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-36851631

RESUMO

Of the 12 million people who inject drugs worldwide, 13% live with HIV. Whether opioid use impacts HIV pathogenesis and latency is an outstanding question. To gain insight into whether opioid use influences the proviral landscape and latent HIV reservoir, we performed intact proviral DNA assays (IPDA) on peripheral blood mononuclear cells (PBMCs) from antiretroviral therapy (ART)-suppressed people living with HIV (PWH) with or without current opioid use. No differences were observed between PWH with and without opioid use in the frequency of HIV intact and defective proviral genomes. To evaluate the latent reservoir, we activated PBMCs from ART-suppressed PWH with or without opioid use and assessed the induction of HIV RNA. PWH using opioids had diminished responses to ex vivo HIV reactivation, suggesting a smaller reversible reservoir of HIV-1 latently infected cells. However, in vitro studies using primary CD4+ T cells treated with morphine showed no effect of opioids on HIV-1 infection, replication or latency establishment. The discrepancy in our results from in vitro and clinical samples suggests that while opioids may not directly impact HIV replication, latency and reactivation in CD4+ T cells, opioid use may indirectly shape the HIV reservoir in vivo by modulating general immune functions.


Assuntos
Infecções por HIV , HIV-1 , Humanos , Analgésicos Opioides/farmacologia , Infecções por HIV/tratamento farmacológico , Leucócitos Mononucleares , Latência Viral , Provírus/genética
9.
AIDS Behav ; 27(7): 2376-2389, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-36670209

RESUMO

Food insecurity (FI) impacts people with HIV (PWH) and those who use substances (i.e. drugs and alcohol). We evaluated the longitudinal association between FI and HIV transmission risks (unprotected sexual contacts and shared needles/syringes). Among 351 PWH who use substances in Russia, 51.6% reported FI and 37.0% past month injection drug use. The mean number of unprotected sexual contacts in the past 90 days was 13.4 (SD 30.1); 9.7% reported sharing needles/syringes in the past month. We did not find a significant association between mild/moderate FI (adjusted IRR = 0.87, 95% CI 0.47, 1.61) or severe FI (aIRR = 0.84, 95% CI 0.46, 1.54; global p = 0.85) and unprotected sexual contacts. We observed a significant association between severe FI and sharing needles/syringes in the past month (adjusted OR = 3.27, 95% CI 1.45, 7.39; p = 0.004), but not between mild/moderate FI and sharing needles/syringes in the past month (aOR = 1.40,95% CI 0.58, 3.38; p = 0.45). These findings suggest that severe FI could be a potential target for interventions to lower HIV transmission.


RESUMEN: La inseguridad alimentaria (IF) afecta a las personas que viven con VIH (PVV y a personas con abuso desustancias (.ej. drogas y alcohol). Evaluamos la asociación longitudinal entre la IF y los riesgos de transmisión del VIH (relaciones sexuales sin protección y agujas/jeringas compartidas). Entre 351 PVVcon abuso de sustancias en Rusia, el 51,6% reportó FI y el 37,0% consumió drogas intravenosas en el último mes. El promedio de contactos sexuales sin protección en los últimos 90 días fue de 13,4 (DE 30,1); el 9,7% informó haber compartido agujas/jeringas en el último mes. No encontramos una asociación significativa entre IF leve/moderada (IRR ajustada = 0,87, IC 95% = 0,47, 1,61) o IF grave (IRRa = 0,84, IC 95% = 0,46, 1,54; p global = 0,85) y relaciones sexuales sin protección. Observamos una asociación significativa entre IF grave y compartir agujas/jeringas en el último mes (OR ajustado = 3,27, IC 95% = 1,45, 7,39; p = 0,004), pero no entre IF leve/moderada y compartir agujas/jeringas en el último mes (ORa = 1,40, IC 95% = 0,58, 3,38; p = 0,45). Estos hallazgos sugieren que la IF grave podría ser un enfoque para intervenciones que buscan reducir la transmisión del VIH.


Assuntos
Infecções por HIV , Abuso de Substâncias por Via Intravenosa , Humanos , Infecções por HIV/epidemiologia , Abuso de Substâncias por Via Intravenosa/complicações , Abuso de Substâncias por Via Intravenosa/epidemiologia , Comportamento Sexual , Insegurança Alimentar , Federação Russa , Uso Comum de Agulhas e Seringas , Abastecimento de Alimentos
10.
AIDS Behav ; 27(2): 431-442, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-35913589

RESUMO

HIV stigma is associated with negative physical and mental health outcomes. Intersectional stigma among persons living with HIV (PLHIV) results from interrelated, synergistic impacts of experiencing multiple stigma forms. Its relation with mental health outcomes is still an emerging area of study in this key population. This study aimed to evaluate associations of intersectional stigma, defined as endorsing high levels of HIV and substance use stigmas, with depressive and anxiety symptoms in a cohort of 111 PLHIV who inject drugs in St. Petersburg, Russia. Over a third of participants (37%) reported experiencing intersectional stigma (i.e., both stigma scores above the median). In adjusted analysis, lower Patient Health Questionnaire depression scale (PHQ-9) scores (beta (ß=-4.31, 95% CI: -7.11 - -1.51, p = 0.003) and Generalized Anxiety Disorders Scale (GAD-7) scores (ß=-3.64, 95% CI: -5.57 - -1.71, p < 0.001) were associated with having low scores for both HIV and substance use stigmas. Lower PHQ-9 scores (ß=-3.46, 95% CI: -5.72 - -1.19, p = 0.003) and GAD-7 scores (ß=-3.06, 95% CI: -4.62 - -1.50, p < 0.001) were also associated with high stigma on either HIV or substance use stigma scales. Controlling for demographics, depressive symptoms approximately linearly increased from both forms of stigma low to experiencing either form of stigma high to experiencing intersectional stigma, while levels of anxiety symptoms were comparable among participants with both types of stigma low and one stigma high. Participants who experienced intersectional stigma reported the greatest severity of both depressive and anxiety symptoms, as compared to individuals who endorsed low stigma scores (i.e., low stigma on both HIV and substance use stigma scales) or high scores of only one form of stigma. This suggests that intersectional stigma in this population of PLHIV who inject drugs in Russia is linked with worsened mental health outcomes, exceeding the effects of experiencing one form of stigma alone. Interventions to help people cope with intersectional stigma need to consider affective symptoms and tailor coping strategies to address impacts of multiple forms of mental health distress.


Assuntos
Infecções por HIV , Transtornos Relacionados ao Uso de Substâncias , Humanos , Saúde Mental , Infecções por HIV/tratamento farmacológico , Infecções por HIV/epidemiologia , Infecções por HIV/complicações , Estigma Social , Transtornos Relacionados ao Uso de Substâncias/complicações , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Federação Russa/epidemiologia
11.
AIDS Behav ; 27(2): 462-472, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-35916947

RESUMO

People with HIV (PWH) who inject drugs often experience coexisting HIV- and substance use-related stigma manifestations. We assessed correlates of HIV stigma (Berger HIV stigma scale), substance use stigma (Substance Abuse Self-stigma scale) and intersectional HIV and substance use stigma in a cohort of PWH with a lifetime history of drug use in St. Petersburg, Russia. Intersectional stigma was defined as having a score greater than the median for both forms of stigma. Of the 208 participants, 56 (27%) had intersectional stigma. Depressive symptoms and alcohol dependence were significantly associated with a higher HIV and substance stigma score, but not with intersectional stigma. Individual and community interventions to reduce the impact of HIV stigma and substance use stigma affecting PWH who inject drugs should consider assessing and addressing mental health and unhealthy substance use. Further work with longitudinal data is needed to understand mechanisms leading to intersectional stigma.


RESUMEN: Las personas infectadas por el VIH que se inyectan drogas a menudo experimentan manifestaciones de estigma relacionadas con el uso de sustancias y el propio VIH. En este estudio evaluamos los correlatos de estigma asociado al VIH (escala de estigma asociado al VIH de Berger), el estigma asociado al uso de sustancias ("Substance Abuse Self-stigma Scale") y el estigma interseccional del VIH y el uso de sustancias en una cohorte de personas infectadas por el VIH con antecedente de uso de drogas en San Petersburgo, Rusia. El estigma interseccional se definió como una puntuación superior a la mediana para ambas formas de estigma. De los 208 participantes, 56 (27%) tenían estigma interseccional. Los síntomas depresivos y la dependencia del alcohol se asociaron significativamente con una puntuación más alta de estigma relacionado con el VIH y las sustancias, pero no con el estigma interseccional. Las intervenciones individuales y comunitarias para reducir el impacto del estigma asociado al VIH y al uso de sustancias que afectan a las personas con VIH que se inyectan drogas deben tener en cuenta la salud mental y el uso nocivo de sustancias. Se necesitan estudios con datos longitudinales para comprender mejor los mecanismos que conducen al estigma interseccional.


Assuntos
Alcoolismo , Infecções por HIV , Abuso de Substâncias por Via Intravenosa , Transtornos Relacionados ao Uso de Substâncias , Humanos , Abuso de Substâncias por Via Intravenosa/complicações , Abuso de Substâncias por Via Intravenosa/epidemiologia , Abuso de Substâncias por Via Intravenosa/psicologia , Infecções por HIV/psicologia , Estigma Social , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Transtornos Relacionados ao Uso de Substâncias/complicações , Alcoolismo/complicações , Federação Russa/epidemiologia
13.
Contemp Clin Trials Commun ; 24: 100861, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34888430

RESUMO

BACKGROUND: HIV-positive people who inject drugs (PWID) experience stigma related to their substance use and HIV, with adverse consequences to their health care utilization and mental health. To help affected individuals cope with their intersectional stigma and reduce its negative impact on health and health care, we adapted a behavioral stigma coping intervention for this HIV key population. OBJECTIVE: To conduct a randomized controlled trial (RCT) testing the 'Stigma Coping to Reduce HIV risks and Improve substance use Prevention and Treatment' (SCRIPT) intervention, a community-based, adapted form of Acceptance and Commitment Therapy (ACT), for PWID living with HIV in St. Petersburg, Russia. METHODS: We recruited 100 PWID living with HIV from civil society organizations (CSO) delivering harm reduction and HIV prevention services in St. Petersburg, Russia. We randomized participants 2:1 to receive either the intervention (three adapted ACT sessions in a group format over one month and usual CSO care) or usual CSO care alone. ACT aims to help affected individuals cope with stigma by increasing their psychological flexibility to handle stigma-related negative expectations, emotions and experiences. The primary outcomes were satisfaction with the intervention, and changes in HIV and substance use stigma scores. CONCLUSIONS: Stigma coping interventions targeting HIV-positive PWID outside of formal health care settings may help them confront negativities in their lives originating from intersectional stigma and reduce stigma's impact as a health care barrier.

14.
J Proteomics ; 116: 106-13, 2015 Feb 26.
Artigo em Inglês | MEDLINE | ID: mdl-25241240

RESUMO

Venoms of the viperid sister genera Eristicophis and Pseudocerastes are poorly studied despite their anecdotal reputation for producing severe or even lethal envenomations. This is due in part to the remote and politically unstable regions that they occupy. All species contained are sit and wait ambush feeders. Thus, this study examined their venoms through proteomics techniques in order to establish if this feeding ecology, and putatively low levels of gene flow, have resulted in significant variations in venom profile. The techniques indeed revealed extreme venom variation. This has immediate implications as only one antivenom is made (using the venom of Pseudocerastes persicus) yet the proteomic variation suggests that it would be of only limited use for the other species, even the sister species Pseudocerastes fieldi. The high degree of variation however also points toward these species being rich resources for novel compounds which may have use as lead molecules in drug design and development. BIOLOGICAL SIGNIFICANCE: These results show extreme venom variation between these closely related snakes. These results have direct implications for the treatment of the envenomed patient.


Assuntos
Proteoma/metabolismo , Venenos de Víboras/metabolismo , Viperidae/metabolismo , Animais , Especificidade da Espécie
15.
J Proteomics ; 105: 285-94, 2014 Jun 13.
Artigo em Inglês | MEDLINE | ID: mdl-24434587

RESUMO

For over a century, venom samples from wild snakes have been collected and stored around the world. However, the quality of storage conditions for "vintage" venoms has rarely been assessed. The goal of this study was to determine whether such historical venom samples are still biochemically and pharmacologically viable for research purposes, or if new sample efforts are needed. In total, 52 samples spanning 5 genera and 13 species with regional variants of some species (e.g., 14 different populations of Notechis scutatus) were analysed by a combined proteomic and pharmacological approach to determine protein structural stability and bioactivity. When venoms were not exposed to air during storage, the proteomic results were virtually indistinguishable from that of fresh venom and bioactivity was equivalent or only slightly reduced. By contrast, a sample of Acanthophis antarcticus venom that was exposed to air (due to a loss of integrity of the rubber stopper) suffered significant degradation as evidenced by the proteomics profile. Interestingly, the neurotoxicity of this sample was nearly the same as fresh venom, indicating that degradation may have occurred in the free N- or C-terminus chains of the proteins, rather than at the tips of loops where the functional residues are located. These results suggest that these and other vintage venom collections may be of continuing value in toxin research. This is particularly important as many snake species worldwide are declining due to habitat destruction or modification. For some venoms (such as N. scutatus from Babel Island, Flinders Island, King Island and St. Francis Island) these were the first analyses ever conducted and these vintage samples may represent the only venom ever collected from these unique island forms of tiger snakes. Such vintage venoms may therefore represent the last remaining stocks of some local populations and thus are precious resources. These venoms also have significant historical value as the Oxyuranus venoms analysed include samples from the first coastal taipan (Oxyuranus scutellatus) collected for antivenom production (the snake that killed the collector Kevin Budden), as well as samples from the first Oxyuranus microlepidotus specimen collected after the species' rediscovery in 1976. These results demonstrate that with proper storage techniques, venom samples can retain structural and pharmacological stability. This article is part of a Special Issue entitled: Proteomics of non-model organisms.


Assuntos
Venenos Elapídicos/química , Preservação Biológica , Proteômica/métodos , Estabilidade Proteica , Fatores de Tempo
16.
Einstein (Säo Paulo) ; 10(1): 22-28, jan.-mar. 2012. tab
Artigo em Inglês, Português | LILACS | ID: lil-621504

RESUMO

Objective: To correlate the Apgar score, and neonatal mortality and its causes at a hospital located in the southern area of São Paulo City. Methods: A retrospective study performed by analysis of medical charts (n=7,094) of all live newborns during the period of 2005 to 2009, with data up to 28 days of life in reference to weight, Apgar score, survival and cause of mortality. Cases were analyzed by the X² test (p < 0.05). Results: In 7,094 births, there were 139 deaths, 58.3% during the first week, and 3.6% of them with Apgar < 4 in the 1st minute. A positive association was found between mortality and this variable, with significantly declining values up to 2,000 g in weight. In the group with weight < 1,000 g, the association with Apgar < 4 in the 1st minute with mortality was three-fold greater than in the 1,000-1,500 g weight group, and 35-fold greater than in the ? 3,000 g group. Among newborns with Apgar 8-10, the rate of mortality and low weight was two times greater than in those with weight > 2,499 g. Fetal distress and prematurity were associated with early neonatal death; malformations and fetal distress to late mortality. The predictive value of death with Apgar < 4 varied, according to weight, from 62.74% in the < 1,000 g group to 5.5%, in the > 3,000 g group. Conclusions: The Apgar score proved linked to factors both epidemiological and related to attention given to the birth and neonatal mortality, and was associated with extremely low birth weight.


Objetivo: Correlacionar o escore de Apgar e a mortalidade neonatal e suas causas em um hospital localizado na zona Sul do município de São Paulo. Métodos: Estudo retrospectivo por análise de prontuário (n=7.094), de todos os recém-nascidos vivos, no período de 2005 a 2009, com dados referentes até os 28 dias de vida, quanto a peso, escore de Apgar, sobrevida e causa de mortalidade. Os casos foram analisados pelo teste do X² (p < 0,05). Resultados: Nos 7.094 nascimentos, houve 139 óbitos, 58,3% na primeira semana, 3,6% com Apgar < 4 no 1º minuto. Foi encontrada associação positiva entre mortalidade e essa variável, com valores decrescentes significantemente até o peso de 2.000 g. No grupo de peso < 1.000 g, a associação do Apgar < 4 no 1º minuto com mortalidade foi três vezes maior do que no grupo 1.000 a 1.500 g e 35 vezes maior do que no grupo ? 3.000 g. Entre os recém-nascidos com Apgar de 8 a 10, a mortalidade entre baixo peso foi duas vezes maior do que nos de peso > 2.499 g. O sofrimento fetal e a prematuridade se associaram a óbito neonatal precoce; malformações e o sofrimento fetal à mortalidade tardia. O valor preditivo de morrer quando o Apgar < 4 variou, conforme o peso, entre 62,74% no grupo < 1.000 g a 5,5% no grupo > 3.000 g. Conclusões: O escore de Apgar se mostrou ligado a fatores epidemiológicos e de atenção ao parto, à mortalidade neonatal e se associou a extremo baixo peso.


Assuntos
Humanos , Masculino , Feminino , Recém-Nascido , Índice de Apgar , Hospitais Urbanos/estatística & dados numéricos , Mortalidade Infantil , Asfixia Neonatal/mortalidade , Peso ao Nascer , Brasil/epidemiologia , Anormalidades Congênitas/mortalidade , Sofrimento Fetal/epidemiologia , Idade Gestacional , Doenças do Recém-Nascido/mortalidade , Doenças do Prematuro/mortalidade , Recém-Nascido de muito Baixo Peso , Infecções/mortalidade , Mortalidade Perinatal , Valor Preditivo dos Testes , Prognóstico , Estudos Retrospectivos , Risco
18.
Einstein (Sao Paulo) ; 9(4): 550-1, 2011 Dec.
Artigo em Inglês, Português | MEDLINE | ID: mdl-26761264
19.
Rev. paul. pediatr ; 26(1): 14-19, mar. 2008. tab
Artigo em Português | LILACS | ID: lil-481097

RESUMO

OBJETIVO: Analisar a cobertura vacinal das crianças durante a segunda etapa da Campanha Nacional de Multivacinação em Unidades Básicas de Saúde (UBS), comparando as diferentes regiões do município de São Paulo. MÉTODOS: Levantamento quantitativo e qualitativo de variáveis referentes às crianças imunizadas durante a vacinação realizada no dia 20/08/2005. Utilizou-se questionário padronizado para a coleta dos seguintes dados: idade, gênero, motivo do atraso vacinal, modo como foi informado da campanha e conhecimento dos responsáveis sobre o intuito da vacinação contra poliomielite. A amostra compreendeu 401 crianças de zero a cinco anos das regiões Norte, Sul, Leste e Oeste da cidade de São Paulo. Foi aplicado o teste de Mann-Whitney, para comparar as idades das crianças de acordo com o gênero, e o qui-quadrado, para verificar a associação entre as regiões municipais, gênero, idade e atraso vacinal. RESULTADOS: A cobertura da segunda etapa da Campanha, de acordo com dados fornecidos pelo Ministério da Saúde, foi de 84,7 por cento - aquém do preconizado. Nossos resultados mostraram que a região Leste apresentou mais crianças com atraso vacinal, justificado pelo difícil acesso à UBS. A televisão foi o meio de divulgação mais eficiente e o médico, o menos. CONCLUSÕES: Existem bolsões de baixa cobertura vacinal. Nenhuma das regiões estudadas atingiu a meta preconizada pelo Programa Nacional de Imunizações (100 por cento). Os gestores locais e os profissionais de saúde devem ser sensibilizados quanto à importância da Campanha.


OBJECTIVE: To compare children vaccine coverage during the second stage of the National Campaign of Multivaccination among Health Centers of different regions of São Paulo city, São Paulo, Brazil. METHODS: This quantitative and qualitative survey enrolled 401 children from 0-5 years old, immunized during the National Campaign of Multivaccination on August 20th, 2005, at North, South, East and West regions of São Paulo city. Standardized questionnaire for data collection was applied to get the following data: ages, gender, reason for vaccination delay, how the adults were informed about the Campaign and how knowledgeable were the adults in charge of the children about the objectives of polio immunization. Mann-Whitney test was applied to compare the children's age by gender and chi-square test was applied to verify the association among the city regions, gender, age and vaccination delay. RESULTS: The coverage of the second stage of the Campaign, according to the National Health Department, was of 84.7 percent, which was below expectation. Our results showed that the East region of São Paulo city presented more children with immunization delays. This finding was justified by difficulties regarding transportation to Health Centers in this area. Television was the most efficient way to inform parents about the Campaign and the physicians, the less efficient one. CONCLUSIONS: None of the studied region reached the goal set by the National Program of Immunization (100 percent). Local managers and the health professionals should be sensitized regarding the importance of immunization campaigns.


Assuntos
Humanos , Masculino , Feminino , Recém-Nascido , Lactente , Pré-Escolar , Centros de Saúde , Cobertura Vacinal , Saúde da Criança , Programas de Imunização
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...