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1.
Arch Sex Behav ; 53(1): 423-438, 2024 01.
Artigo em Inglês | MEDLINE | ID: mdl-37814102

RESUMO

It is unclear whether sexual well-being, which is an important part of individual and relational health, may be at risk for declines after a pregnancy loss given the limits of prior work. Accordingly, in a cross-sectional study, we used structural equation modeling to (1) compare sexual well-being levels-satisfaction, desire, function, distress, and frequency-of both partners in couples who had experienced a pregnancy loss in the past four months (N = 103 couples) to their counterparts in a control sample of couples with no history of pregnancy loss (N = 120 couples), and (2) compare sexual well-being levels of each member of a couple to one another. We found that gestational individuals and their partners in the pregnancy loss sample were less sexually satisfied than their control counterparts but did not differ in sexual desire, problems with sexual function, nor sexual frequency. Surprisingly, we found that partners of gestational individuals had less sexual distress than their control counterparts. In the pregnancy loss sample, gestational individuals had lower levels of sexual desire post-loss than their partners but did not differ in sexual satisfaction, problems with sexual function, nor sexual distress. Our results provide evidence that a recent pregnancy loss is associated with lower sexual satisfaction and greater differences between partners in sexual desire, which may be useful information for clinicians working with couples post-loss. Practitioners can share these findings with couples who may find it reassuring that we did not find many aspects of sexual well-being to be related to pregnancy loss at about three months post-loss.


Assuntos
Comportamento Sexual , Parceiros Sexuais , Gravidez , Feminino , Humanos , Estudos Transversais , Orgasmo , Libido , Satisfação Pessoal
2.
J Sex Med ; 20(10): 1241-1251, 2023 10 03.
Artigo em Inglês | MEDLINE | ID: mdl-37632412

RESUMO

BACKGROUND: Medically assisted reproduction is a vulnerable time for couples' sexual health. Believing that sexual challenges can be worked through (i.e., sexual growth beliefs) or that these challenges indicate incompatibility (i.e., sexual destiny beliefs) may be related to dyadic coping-the strategies couples use to cope-with the physical and psychological stressors of medically assisted reproduction. AIM: In the current study we aimed to examine the longitudinal associations between typical (i.e., average) levels of sexual growth and destiny beliefs and positive and negative facets of dyadic coping and how greater than typical levels of these constructs predicted each other across time. METHODS: Couples (n = 219) seeking medically assisted reproduction were recruited for an online longitudinal, dyadic study. OUTCOMES: Couples completed online measures of sexual growth and destiny beliefs and positive and negative dyadic coping at baseline, 6-and 12-months. RESULTS: Random intercept cross-lagged panel models demonstrated that at the within-person level, reporting higher sexual growth beliefs at baseline, relative to their average across time points, was associated with lower negative dyadic coping at 6 months. Higher negative dyadic coping at 6 months, relative to their average, was linked to lower sexual growth beliefs at 12-months. When individuals reported higher sexual destiny beliefs at 6-months, relative to their average, they and their partners reported higher negative dyadic coping at 12 -months. At the between-person level, higher overall levels of sexual destiny beliefs were related to higher overall levels of negative dyadic coping. No associations with positive dyadic coping were identified. CLINICAL IMPLICATIONS: Couples may benefit from identifying and reducing unhelpful beliefs about sex and negative dyadic coping. STRENGTHS AND LIMITATIONS: Strengths of this study include our large, inclusive sample, engagement of community partners, and novel analytical approach to assess change over time. However, following couples in 6-month increments and not using questionnaires specific to medically assisted reproduction may have limited our ability to detect nuanced changes that couples experience during this time. CONCLUSION: Lower sexual growth and higher sexual destiny beliefs may promote couples' engagement in less adaptive coping behaviors as they seek medically assisted reproduction.


Assuntos
Adaptação Psicológica , Comportamento Sexual , Humanos , Comportamento Sexual/psicologia , Estresse Psicológico/psicologia , Reprodução , Inquéritos e Questionários , Parceiros Sexuais/psicologia
3.
J Sex Med ; 19(9): 1366-1377, 2022 09.
Artigo em Inglês | MEDLINE | ID: mdl-35842308

RESUMO

BACKGROUND: Postpartum sexual concerns are associated with depressive symptoms, distress, and lower relationship satisfaction, and are commonly reported by both mothers and their partners. Previous studies have examined changes in postpartum sexual concern using aggregate scores and have not examined patterns of change for unique concerns, thus ignoring that the initial levels and trajectories of a variety of distinct, postpartum sexual concerns may differ from one another and may differ between mothers and partners. AIMS: The aims of the current study were to (i) examine how a variety of postpartum sexual concerns change from 3 to 12 months postpartum for mothers and their partners using a sample of first-time parents, and (ii) examine how mothers and their partners may differ in their initial levels and subsequent changes in postpartum sexual concerns. METHODS: First-time mothers and their partners (N = 203 couples) independently completed a measure of 21 postpartum sexual concerns at 3, 6, 9, and 12 months postpartum. OUTCOMES: Postpartum Sexual Concerns Questionnaire RESULTS: Growth modeling indicated that twelve of mothers' and 6 of partners' postpartum sexual concerns declined over time from 3 to 12 months postpartum, only one concern of mothers' and none of partners' concerns increased over time, and the remaining 8 and 15 concerns were stable for mothers and partners, respectively. At 3 months postpartum, mothers had higher levels of 11 postpartum sexual concerns than partners, while partners had higher levels than mothers on 4 concerns. Compared to partners, from 3 to 12 months postpartum, mothers showed both steeper decreases in concern about body image changes and steeper increases in concern about returning to work. CLINICAL IMPLICATIONS: Various postpartum sexual concerns do not all follow the same pattern of change over time, and mothers and their partners share similarities and differences in these patterns. Clinicians should use a checklist to discuss a range of postpartum sexual concerns with both new mothers and their partners. STRENGTHS AND LIMITATIONS: This is the first study, to our knowledge, to examine how a variety of postpartum sexual concerns change over time and how mothers and partners both differ and are similar in their experiences. Most couples were in mixed-sex relationships, identified as White, and were relatively affluent; results may not generalize. CONCLUSION: A variety of postpartum sexual concerns follow different patterns of change from 3 to 12 months postpartum, and mothers and partners share similarities and differences in these patterns. Allsop DB, Impett EA, Vannier SA, et al. Change in 21 Sexual Concerns of New Parents From Three to Twelve Months Postpartum: Similarities and Differences between Mothers and Partners. J Sex Med 2022;19:1366-1377.


Assuntos
Período Pós-Parto , Comportamento Sexual , Feminino , Humanos , Mães , Pais , Satisfação Pessoal , Parceiros Sexuais , Inquéritos e Questionários
4.
J Sex Marital Ther ; 47(1): 16-31, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-32821026

RESUMO

We evaluated gender differences in differentiation of self, specifically addressing aspects of emotional cutoff (EC) and emotional reactivity (ER), and their association with relational and sexual satisfaction and sexual desire. Midlife U.S. men and women (N = 334 married heterosexual couples; 50% female; 85% Caucasian, mean age 47.4 years) completed online surveys. Men reported higher levels of EC compared to women after accounting for control variables-a medium effect (Cohen's d = .48) which negatively predicted their own relationship and sexual satisfaction as well as partner relationship satisfaction. Women's EC was also negatively associated with their own relationship satisfaction. Women reported higher levels of ER compared to men after accounting for control variables-a small effect (Cohen's d = .18). No associations with ER and outcome variables were found and no other partner effects were found. For couples in which the woman was higher on ER, the association between women's T1 emotional reactivity and men's T2 sexual desire was positive and significant (B = .31, p < .05). These findings underscore the influence of emotional cutoff on relationship satisfaction and sexual desire and the importance of staying engaged even through relational conflict.


Assuntos
Relações Interpessoais , Libido , Cônjuges/psicologia , Emoções , Feminino , Humanos , Masculino , Análise de Mediação , Pessoa de Meia-Idade , Satisfação Pessoal , Parceiros Sexuais/psicologia
5.
J Sex Marital Ther ; 47(2): 147-161, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33263504

RESUMO

The association of mindfulness with couples' relational and sexual satisfaction may be mediated by forgiveness and gratitude. Although forgiveness and gratitude have individually been shown to play a role in couples' relational and sexual satisfaction, we use an integrated model. This study included 1,360 couples recruited through a nationwide two-stage cluster stratification. Using an actor-partner interdependence model, we found significant indirect effects (ß = 0.01, 0.08, p < .01), indicating that forgiveness and gratitude mediated many of the associations between couples' mindfulness and their sexual and relational satisfaction. This may provide useful information for clinicians and therapists when addressing marital issues.


Assuntos
Perdão , Atenção Plena , Heterossexualidade , Humanos , Casamento , Satisfação Pessoal
6.
J Sex Marital Ther ; 47(6): 545-557, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33977837

RESUMO

Those with low sexual satisfaction tend to have low relational satisfaction. However, literature provides examples of those who maintain satisfying relationships despite low sexual satisfaction yet provides few clues as to what factors protect these individuals. Using U.S. nationally representative data from 1569 newlywed couples, we investigated if empathy for one's partner buffers individuals and couples from low relational satisfaction due to low sexual satisfaction. The positive connection between sexual satisfaction and relational satisfaction was weak for those reporting high empathy but was strong for those reporting low empathy. Empathy may protect against poor relational satisfaction when sexual satisfaction is low.


Assuntos
Empatia , Satisfação Pessoal , Humanos , Relações Interpessoais , Orgasmo , Comportamento Sexual , Parceiros Sexuais
7.
J Sex Marital Ther ; 47(8): 814-828, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34472422

RESUMO

Mindfulness has shown positive links with conflict resolution. Additionally, couples skilled in conflict resolution report greater sexual and relationship satisfaction. However, no research has examined the moderating effect of mindfulness, specifically sexual mindfulness, between conflict resolution and sexual and relationship satisfaction. We used 1,627 couples from wave III of the Couple Relationships and Transition Experiences (CREATE) study. Sexual mindfulness moderated the association between conflict resolution and sexual satisfaction, even after controlling for attachment. Wives higher in sexual mindful awareness may rely less on conflict resolution for their sexual satisfaction. Karremans and colleagues' (2017) model of mindfulness and romantic relationships provides a framework for testing whether, when, and how mindfulness increases positive romantic relationship processes and outcomes. Under this framework, mindfulness may provide a mechanism to help couples achieve sexual and relationship satisfaction. Mindfulness and sexual mindfulness may provide a useful mechanism for therapists, educators, social workers, and couples to enhance satisfaction within the romantic and sexual relationship even without partner buy-in.


Assuntos
Atenção Plena , Humanos , Negociação , Orgasmo , Satisfação Pessoal , Comportamento Sexual , Parceiros Sexuais
8.
J Relig Health ; 60(3): 1576-1599, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-33464432

RESUMO

We investigated the intersection of religion and boundaries placed around sex using qualitative data from 198 highly religious Muslim, Christian, and Jewish families. Coding performed by two researchers resulted in six core themes that provide insight into the connection between these two domains. Frequency counts of the core themes, participant quotes, and implications are presented-including the benefits of practitioners inquiring into how clients' faith affects sexual behavior and scripts, how fidelity and vows might serve a protective function for the relationships of highly religious couples, and how religion may empower women in terms of sexual boundary setting.


Assuntos
Islamismo , Judaísmo , Cristianismo , Feminino , Humanos , Judeus , Religião , Comportamento Sexual
9.
Proc Natl Acad Sci U S A ; 114(38): E7929-E7938, 2017 09 19.
Artigo em Inglês | MEDLINE | ID: mdl-28874525

RESUMO

The progressive aging of the world's population makes a higher prevalence of neurodegenerative diseases inevitable. The necessity for an accurate, but at the same time, inexpensive and minimally invasive, diagnostic test is urgently required, not only to confirm the presence of the disease but also to discriminate between different types of dementia to provide the appropriate management and treatment. In this study, attenuated total reflection FTIR (ATR-FTIR) spectroscopy combined with chemometric techniques were used to analyze blood plasma samples from our cohort. Blood samples are easily collected by conventional venepuncture, permitting repeated measurements from the same individuals to monitor their progression throughout the years or evaluate any tested drugs. We included 549 individuals: 347 with various neurodegenerative diseases and 202 age-matched healthy individuals. Alzheimer's disease (AD; n = 164) was identified with 70% sensitivity and specificity, which after the incorporation of apolipoprotein ε4 genotype (APOE ε4) information, increased to 86% when individuals carried one or two alleles of ε4, and to 72% sensitivity and 77% specificity when individuals did not carry ε4 alleles. Early AD cases (n = 14) were identified with 80% sensitivity and 74% specificity. Segregation of AD from dementia with Lewy bodies (DLB; n = 34) was achieved with 90% sensitivity and specificity. Other neurodegenerative diseases, such as frontotemporal dementia (FTD; n = 30), Parkinson's disease (PD; n = 32), and progressive supranuclear palsy (PSP; n = 31), were included in our cohort for diagnostic purposes. Our method allows for both rapid and robust diagnosis of neurodegeneration and segregation between different dementias.


Assuntos
Doença de Alzheimer/sangue , Doença de Alzheimer/diagnóstico , Apolipoproteína E4/sangue , Adulto , Idoso , Idoso de 80 Anos ou mais , Alelos , Doença de Alzheimer/genética , Apolipoproteína E4/genética , Feminino , Genótipo , Humanos , Masculino , Pessoa de Meia-Idade , Sensibilidade e Especificidade , Espectroscopia de Infravermelho com Transformada de Fourier/métodos
10.
J Adolesc ; 81: 73-86, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32387815

RESUMO

INTRODUCTION: Using an online survey, we evaluated how adolescent trait and state mindfulness was associated with positive adolescent outcomes in non-sexually active and sexually active adolescents. Additionally, we evaluated a newly developed measure, the Sexual Mindfulness Measure (SMM), with adolescents. METHODS: We asked 2000 U.S. adolescents (half boys/girls; 1/3 low, medium, and high incomes) aged 13-18 (one group 13-15, another 16-18) about trait mindfulness, sexual state mindfulness, and adolescent outcomes. Using Confirmatory Factor Analysis and structured equation modeling, we evaluated the reliability and validity of the SMM and its associations with adolescent outcomes. RESULTS: Using a trait mindfulness measure, we found that mindful adolescents with no sexual experience, showed positive associations with self-efficacy, body-esteem, and disclosure with both fathers and mothers. Evaluating adolescents who were sexually active, we confirmed that the SMM had a two-factor structure and demonstrated acceptable reliability for both male and female adolescents. We found that the SMM was associated with positive sexual attitudes, body image, self-efficacy, and disclosure to parents above and beyond trait mindfulness. CONCLUSIONS: Trait mindfulness was associated with positive self-assessments and parental disclosure. The SMM provided an important assessment of how sexually active adolescents' ability to remain aware and non-judgmental during sexual experiences may be positively associated with outcomes such as sexual consent, positive body image, self-efficacy, disclosure to parents, and negatively associated with sexual shame and sexual anxiety above and beyond trait mindfulness.


Assuntos
Atenção Plena , Autorrevelação , Sexualidade/psicologia , Adolescente , Comportamento do Adolescente , Imagem Corporal , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Relações Pais-Filho , Reprodutibilidade dos Testes , Inquéritos e Questionários
12.
Proc Natl Acad Sci U S A ; 113(39): 10797-801, 2016 09 27.
Artigo em Inglês | MEDLINE | ID: mdl-27601646

RESUMO

Biologically formed nanoparticles of the strongly magnetic mineral, magnetite, were first detected in the human brain over 20 y ago [Kirschvink JL, Kobayashi-Kirschvink A, Woodford BJ (1992) Proc Natl Acad Sci USA 89(16):7683-7687]. Magnetite can have potentially large impacts on the brain due to its unique combination of redox activity, surface charge, and strongly magnetic behavior. We used magnetic analyses and electron microscopy to identify the abundant presence in the brain of magnetite nanoparticles that are consistent with high-temperature formation, suggesting, therefore, an external, not internal, source. Comprising a separate nanoparticle population from the euhedral particles ascribed to endogenous sources, these brain magnetites are often found with other transition metal nanoparticles, and they display rounded crystal morphologies and fused surface textures, reflecting crystallization upon cooling from an initially heated, iron-bearing source material. Such high-temperature magnetite nanospheres are ubiquitous and abundant in airborne particulate matter pollution. They arise as combustion-derived, iron-rich particles, often associated with other transition metal particles, which condense and/or oxidize upon airborne release. Those magnetite pollutant particles which are <∼200 nm in diameter can enter the brain directly via the olfactory bulb. Their presence proves that externally sourced iron-bearing nanoparticles, rather than their soluble compounds, can be transported directly into the brain, where they may pose hazard to human health.


Assuntos
Poluição do Ar/análise , Encéfalo/metabolismo , Nanopartículas de Magnetita/química , Encéfalo/ultraestrutura , Humanos , Nanopartículas de Magnetita/ultraestrutura , México , Tamanho da Partícula , Espectrometria por Raios X , Espectroscopia de Perda de Energia de Elétrons , Reino Unido
13.
Analyst ; 143(24): 5959-5964, 2018 Dec 03.
Artigo em Inglês | MEDLINE | ID: mdl-30183030

RESUMO

Alzheimer's disease (AD) is currently under-diagnosed and is predicted to affect a great number of people in the future, due to the unrestrained aging of the population. An accurate diagnosis of AD at an early stage, prior to (severe) symptomatology, is of crucial importance as it would allow the subscription of effective palliative care and/or enrolment into specific clinical trials. Today, new analytical methods and research initiatives are being developed for the on-time diagnosis of this devastating disorder. During the last decade, spectroscopic techniques have shown great promise in the robust diagnosis of various pathologies, including neurodegenerative diseases and dementia. In the current study, blood plasma samples were analysed with near-infrared (NIR) spectroscopy as a minimally-invasive method to distinguish patients with AD (n = 111) from non-demented volunteers (n = 173). After applying multivariate classification models (principal component analysis with quadratic discriminant analysis - PCA-QDA), AD individuals were correctly identified with 92.8% accuracy, 87.5% sensitivity and 96.1% specificity. Our results show the potential of NIR spectroscopy as a simple and cost-effective diagnostic tool for AD. Robust and early diagnosis may be a first step towards tackling this disease by allowing timely intervention.


Assuntos
Doença de Alzheimer/diagnóstico , Análise Química do Sangue/métodos , Espectroscopia de Luz Próxima ao Infravermelho/métodos , Idoso , Análise Discriminante , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Análise de Componente Principal
14.
Med J Aust ; 209(5): 211-216, 2018 08 03.
Artigo em Inglês | MEDLINE | ID: mdl-30092752

RESUMO

OBJECTIVE: To explore patterns of cannabis use for medical purposes in Australia immediately prior to the 2016 legislation for frameworks for medical cannabis use. Design, setting: Anonymous online survey with convenience sample, April-October 2016. Participants were recruited through online media and at professional and consumer forums. PARTICIPANTS: Adults (at least 18 years of age) who reported using a cannabis product for self-identified medical or therapeutic reasons during the preceding 12 months. MAIN OUTCOME MEASURES: Consumer characteristics; indications and patterns of medical cannabis use; perceived benefits and harms; views on appropriate availability of medical cannabis. RESULTS: Most of the 1748 participants were men (68.1%) and employed (56.6%), with a mean age of 37.9 years (SD, 13.4 years) and mean reported period of medical cannabis use of 9.8 years (SD, 12.5 years). The most frequent reasons for medical cannabis use were anxiety (50.7%), back pain (50.0%), depression (49.3%), and sleep problems (43.5%). Respondents had used medical cannabis on a mean of 19.9 of the previous 28 days (SD, 10.0 days), spending a mean $68.60 (SD, $85.00) per week, and 83.4% had inhaled the substance. Participants reported high levels of clinical effectiveness and frequent side effects, including drowsiness, ocular irritation, lethargy and memory impairment; 17% met DSM-5 criteria for moderate or severe cannabis use disorder. Many reported harms or concerns related to the illicit status of cannabis. Participants believed that medical cannabis should be integrated into mainstream health care, and that products should be required to meet consistency and safety standards. CONCLUSION: Illicitly sourced cannabis is used to treat a broad range of medical conditions in Australia. Future models of prescribed medical cannabis take consumer patterns of use and demand into consideration.


Assuntos
Cannabis , Abuso de Maconha/epidemiologia , Maconha Medicinal/uso terapêutico , Uso Off-Label/estatística & dados numéricos , Automedicação/estatística & dados numéricos , Adulto , Austrália/epidemiologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Inquéritos e Questionários , Resultado do Tratamento
15.
BMC Psychiatry ; 18(1): 140, 2018 05 18.
Artigo em Inglês | MEDLINE | ID: mdl-29776349

RESUMO

BACKGROUND: The cannabis extract nabiximols (Sativex®) effectively supresses withdrawal symptoms and cravings in treatment resistant cannabis dependent individuals, who have high relapse rates following conventional withdrawal treatments. This study examines the efficacy, safety and cost-effectiveness of longer-term nabiximols treatment for outpatient cannabis dependent patients who have not responded to previous conventional treatment approaches. METHODS/DESIGN: A phase III multi-site outpatient, randomised, double-blinded, placebo controlled parallel design, comparing a 12-week course of nabiximols to placebo, with follow up at 24 weeks after enrolment. Four specialist drug and alcohol outpatient clinics in New South Wales, Australia. One hundred forty-two treatment seeking cannabis dependent adults, with no significant medical, psychiatric or other substance use disorders. Nabiximols is an oromucosal spray prescribed on a flexible dose regimen to a maximum daily dose of 32 sprays; 8 sprays (total 21.6 mg tetrahydrocannabinol (THC) and 20 mg cannabidiol (CBD)) four times a day, or matching placebo, dispensed weekly. All participants will receive six-sessions of individual cognitive behavioural therapy (CBT) and weekly clinical reviews. Primary endpoints are use of non-prescribed cannabis (self-reported cannabis use days, urine toxicology), safety measures (adverse events and abuse liability), and cost effectiveness (incremental cost effectiveness in achieving additional Quality Adjusted Life Years). Secondary outcomes include, improvement in physical and mental health parameters, substance use other than cannabis, cognitive functioning and patient satisfaction measures. DISCUSSION: This is the first outpatient community-based randomised controlled study of nabiximols as an agonist replacement medication for treating cannabis dependence, targeting individuals who have not previously responded to conventional treatment approaches. The study and treatment design is modelled upon an earlier study with this population and more generally on other agonist replacement treatments (e.g. nicotine, opioids). TRIAL REGISTRATION: Australian and New Zealand Clinical Trial Registry: ACTRN12616000103460 (Registered 1st February 2016).


Assuntos
Canabidiol/uso terapêutico , Canabinoides/efeitos adversos , Dronabinol/uso terapêutico , Abuso de Maconha/tratamento farmacológico , Síndrome de Abstinência a Substâncias/tratamento farmacológico , Adulto , Austrália , Cognição/efeitos dos fármacos , Terapia Cognitivo-Comportamental/métodos , Terapia Combinada , Fissura/efeitos dos fármacos , Método Duplo-Cego , Combinação de Medicamentos , Feminino , Humanos , Masculino , New South Wales , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento
16.
Epilepsy Behav ; 70(Pt B): 334-340, 2017 05.
Artigo em Inglês | MEDLINE | ID: mdl-28238865

RESUMO

Epilepsy Action Australia conducted an Australian nationwide online survey seeking opinions on and experiences with the use of cannabis-based products for the treatment of epilepsy. The survey was promoted via the Epilepsy Action Australia's main website, on their Facebook page, and by word of mouth. The survey consisted of 39 questions assessing demographics, clinical factors, including diagnosis and seizure types, and experiences with and opinions towards cannabis use in epilepsy. A total of 976 responses met the inclusion criteria. Results show that 15% of adults with epilepsy and 13% of parents/guardians of children with epilepsy were currently using, or had previously used, cannabis products to treat epilepsy. Of those with a history of cannabis product use, 90% of adults and 71% of parents reported success in reducing seizure frequency after commencing cannabis products. The main reasons for medicinal cannabis use were to manage treatment-resistant epilepsy and to obtain a more favorable side-effect profile compared to standard antiepileptic drugs. The number of past antiepileptic drugs tried was a significant predictor of medicinal cannabis use in both adults and children with epilepsy. Fifty-six percent of adults with epilepsy and 62% of parents/guardians of children with epilepsy expressed willingness to participate in clinical trials of cannabinoids. This survey provides insight into the use of cannabis products for epilepsy, in particular some of the likely factors influencing use, as well as novel insights into the experiences of and attitudes towards medicinal cannabis in people with epilepsy in the Australian community. This article is part of a Special Issue entitled "Cannabinoids and Epilepsy".


Assuntos
Anticonvulsivantes/uso terapêutico , Cannabis , Epilepsia Resistente a Medicamentos/tratamento farmacológico , Maconha Medicinal/uso terapêutico , Inquéritos e Questionários , Adolescente , Adulto , Idoso , Austrália/epidemiologia , Canabinoides/uso terapêutico , Criança , Pré-Escolar , Epilepsia Resistente a Medicamentos/epidemiologia , Epilepsia/tratamento farmacológico , Epilepsia/epidemiologia , Feminino , Previsões , Humanos , Lactente , Masculino , Fumar Maconha/epidemiologia , Pessoa de Meia-Idade , Adulto Jovem
17.
Nanomedicine ; 13(2): 723-732, 2017 02.
Artigo em Inglês | MEDLINE | ID: mdl-27769888

RESUMO

Aggregation of amyloid-ß peptide (Aß) is a key event in the pathogenesis of Alzheimer's disease (AD). We investigated the effects of nanoliposomes decorated with the retro-inverso peptide RI-OR2-TAT (Ac-rGffvlkGrrrrqrrkkrGy-NH2) on the aggregation and toxicity of Aß. Remarkably low concentrations of these peptide inhibitor nanoparticles (PINPs) were required to inhibit the formation of Aß oligomers and fibrils in vitro, with 50% inhibition occurring at a molar ratio of ~1:2000 of liposome-bound RI-OR2-TAT to Aß. PINPs also bound to Aß with high affinity (Kd=13.2-50 nM), rescued SHSY-5Y cells from the toxic effect of pre-aggregated Aß, crossed an in vitro blood-brain barrier model (hCMEC/D3 cell monolayer), entered the brains of C57 BL/6 mice, and protected against memory loss in APPSWE transgenic mice in a novel object recognition test. As the most potent aggregation inhibitor that we have tested so far, we propose to develop PINPs as a potential disease-modifying treatment for AD.


Assuntos
Doença de Alzheimer/fisiopatologia , Doença de Alzheimer/terapia , Nanopartículas , Fragmentos de Peptídeos , Peptídeos beta-Amiloides , Animais , Barreira Hematoencefálica , Humanos , Lipossomos , Camundongos Transgênicos , Células Tumorais Cultivadas
18.
Int J Legal Med ; 130(1): 147-52, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26233612

RESUMO

Urinary 11-nor-Δ(9)-tetrahydrocannabinol-9-carboxylic acid (Carboxy-THC) concentrations, normalised to creatinine output, have been demonstrated to be a useful tool in the interpretation of the results of a series of urine tests for cannabis. These tests, often termed historical data, can be used to identify potential chronic cannabis users who may present occupational health and safety risks within the workplace. Conversely, the data can also be used to support employee claims of previous regular, rather than recent, cannabis use. This study aimed at examining the mean elimination of Carboxy-THC in 37 chronic users undergoing voluntary abstinence over a 2-week period. Urine specimens were collected prior to the study and after 1 and 2 weeks of abstinence. Carboxy-THC levels in urine were measured by gas chromatography-mass spectrometry (GC-MS) following alkaline hydrolysis, organic solvent extraction and derivatisation to form its pentafluoropropionic derivative. The creatinine-normalised Carboxy-THC concentrations declined rapidly over the 2 weeks of abstinence period and the majority of chronic cannabis users (73%) reduced their urinary Carboxy-THC levels to below the 15-µg/L confirmatory cutoff within that time. The study further highlights the value of historical urinary Carboxy-THC data as a means of identifying potential occupational health and safety risks among chronic cannabis users.


Assuntos
Dronabinol/análogos & derivados , Abuso de Maconha/urina , Psicotrópicos/urina , Estudos de Coortes , Dronabinol/farmacocinética , Dronabinol/urina , Cromatografia Gasosa-Espectrometria de Massas , Humanos , Psicotrópicos/farmacocinética , Detecção do Abuso de Substâncias
19.
J Biol Chem ; 289(17): 12052-12062, 2014 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-24619420

RESUMO

According to the "amyloid cascade" hypothesis of Alzheimer disease, the formation of Aß fibrils and senile plaques in the brain initiates a cascade of events leading to the formation of neurofibrillary tangles, neurodegeneration, and the symptom of dementia. Recently, however, emphasis has shifted away from amyloid fibrils as the predominant toxic form of Aß toward smaller aggregates, referred to as "soluble oligomers." These oligomers have become one of the prime suspects for involvement in the early oxidative damage that is evident in this disease. This raises the question whether or not Aß fibrils are actually "inert tombstones" present at the end of the aggregation process. Here we show that, when Aß(1-42) aggregates, including fibrils, are bound to Cu(II) ions, they retain their redox activity and are able to degrade hydrogen peroxide (H2O2) with the formation of hydroxyl radicals and the consequent oxidation of the peptide (detected by formation of carbonyl groups). We find that this ability increases as the Cu(II):peptide ratio increases and is accompanied by changes in aggregate morphology, as determined by atomic force microscopy. When aggregates are prepared in the copresence of Cu(II) and Zn(II) ions, the ratio of Cu(II):Zn(II) becomes an important factor in the degeneration of H2O2, the formation of carbonyl groups in the peptide, and in aggregate morphology. We believe, therefore, that Aß fibrils can destroy H2O2 and generate damaging hydroxyl radicals and, so, are not necessarily inert end points.


Assuntos
Doença de Alzheimer/metabolismo , Peptídeos beta-Amiloides/metabolismo , Cobre/metabolismo , Peróxido de Hidrogênio/metabolismo , Fragmentos de Peptídeos/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Humanos , Microscopia de Força Atômica , Ligação Proteica
20.
Emotion ; 2024 Aug 15.
Artigo em Inglês | MEDLINE | ID: mdl-39146067

RESUMO

Relationship conflicts, which are common among committed couples, provoke negative emotions with implications for sexual well-being (i.e., satisfaction, desire, low distress). Couples might manage these emotions through extrinsic interpersonal emotion regulation (IER; attempting to influence the emotions of a romantic partner). In a preregistered dyadic, daily diary, and longitudinal study, we examined how four distinct IER strategies-responsiveness, cognitive support, physical presence, hostility-perceived by a romantic partner during relationship conflict related to both partners' sexual well-being. Over 28 days, community couples (N = 122; recruited between 2022 and 2023) completed brief measures of IER and sexual satisfaction, desire, and distress on days of relationship conflict and full versions of these measures 4 months later. Results may be generalizable to community couples in North America; however, improving the diversity of samples in future research would extend generalizability. Generally, greater perceived responsiveness, cognitive support, and physical presence IER on conflict days were each associated with higher daily sexual satisfaction and desire for couples, while greater perceived hostility was associated with lower daily satisfaction and desire. Greater perceived physical presence averaged across diaries was associated with one's own increased desire 4 months later. Most effects were similar for men and women; however, on days when women perceived greater responsiveness and cognitive support from partners, their partners reported more sexual distress, but there was no association between men's perceived IER and partners' distress. Findings expand models of IER to include sexual well-being and support IER as a target for interventions aimed at promoting sexual well-being. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

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