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Introduction: Previous studies have demonstrated associations between sex and racialized group on pain sensitivity and tolerance. We analyzed the association of sex and racialized group on heat pain sensitivity, sensibility to painful suprathreshold mechanical pain (STMP), and pain sensitivity questionnaire (PSQ). We hypothesized that anxiety and pain catastrophizing reported by racialized minority groups and women would mediate enhanced pain sensitivity. Our secondary aim was to evaluate validity of the PSQ in a diverse population. Methods: Using quantitative sensory testing for painful heat, STMP (forces: 64, 128, 256, and 512 mN), and PSQ, we evaluated pain sensitivity in 134 healthy participants [34 (18 women) Asian, 25 (13 women) Black, and 75 (41 women) White]. We used general linear and linear mixed models to analyze outcomes. We assessed mediation of state and trait anxiety and pain catastrophizing on pain sensitivity. Results: Racialized minority status was associated with greater heat pain sensitivity (F = 7.63; P = 0.00074) and PSQ scores (F = 15.45; P = 9.84 × 10-7) but not associated with STMP (F = 1.50; P = 0.23). Female sex was associated with greater heat pain sensitivity (F = 4.9; P = 0.029) and lower PSQ (F = 9.50; P = 0.0025) but not associated with STMP (F = 0.0018; P = 0.97). Neither anxiety nor pain catastrophizing mediated associations between sex or racialized group with heat pain threshold or PSQ. Differential experience of individual items (F = 19.87; P = 3.28 × 10-8) limited PSQ face validity in racialized minorities. Conclusion: Consistent with previous research, sensitivity to painful heat was associated with racialized minority status and female sex. By contrast, there was no significant effect of racialized minority status or female sex on STMP. Some PSQ items are inapplicable to participants from racialized minority groups.
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BACKGROUND: The respiratory infection caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has evolved into a multi-organ disorder, with long-term effects known as post-acute sequelae of SARS-CoV-2 infection or long coronavirus disease (COVID). AIM: To examine the current knowledge and outcomes of long-term neurological and gastrointestinal (GI) symptoms in adult cohorts, including United States minority populations. METHODS: PubMed and Google Scholar were searched using relevant terms, and data from five studies were analyzed, comprising 27383 patients with persistent neurological and GI sequelae. RESULTS: The main symptoms included anxiety, depression, dysphagia, headache, vomiting, nausea, gastroesophageal reflux, fatigue, and abdominal pain. Patients with comorbidities and metabolic syndromes were at higher risk for long COVID. While most patients were European Americans, there was a need for further study on African Americans. CONCLUSION: The underlying causes of these symptoms remain unclear, warranting more investigation into the long-term impact of the SARS-CoV-2 on different populations.
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The COVID-19 pandemic within the United States of America resulted in over 800,000 deaths as of February 2022 and has been addressed by social distancing or stay-at-home measures. Collective prolonged multimodal trauma on this scale is likely to elicit symptomatology in the general population consistent with post-traumatic stress disorder (PTSD), somatization, anxiety, and stress. The psychological component of this response contributes substantially to the burden of this disease worldwide. This cross-sectional study examines the relationship between COVID-19-related concern, anxiety, and perceived stress on PTSD-like symptomatology over the course of the COVID-19 pandemic. Participants were recruited via social media within the United States of America between 8th May 2020 and 11th August 2021 to complete an internet questionnaire including mood, personality, and COVID-19-specific scales. General anxiety and PTSD-like symptomatology were above the screening cutoffs for most respondents. These measures increased in severity over the pandemic, with the change point of our Concern scale preceding that of the other significant measures. Measures of COVID-19-related concern, generalized anxiety, and PTSD-like symptomatology were strongly correlated with each other. Anxiety, perceived stress, and PTSD-like symptomatology are strongly interrelated, increase with pandemic length, and are linked to reported levels of concern over COVID-19. These observations may aid future research and policy as the pandemic continues.
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COVID-19 , Transtornos de Estresse Pós-Traumáticos , Ansiedade/epidemiologia , Ansiedade/psicologia , COVID-19/epidemiologia , Estudos Transversais , Depressão/epidemiologia , Humanos , Pandemias/prevenção & controle , Transtornos de Estresse Pós-Traumáticos/psicologia , Estresse Psicológico/epidemiologia , Estados UnidosRESUMO
Objectives: The global impact of COVID-19 driven by new variants may add to the negative mental health consequences of the prolonged pandemic, including posttraumatic stress symptoms (PTSS). University students may be prone to develop a series of PTSS due to life plan disruptions as well as increased uncertainty caused by the pandemic. The purpose of this study was to assess the associations between pandemic fatigue, anxiety sensitivity (AS), and PTSS among university students in South Korea. Methods: Using convenience sampling, 400 students participated in this cross-sectional online survey. Descriptive statistics and linear mixed models were used to examine factors associated with PTSS. Results: About one-third (32.3%) of the participants reported clinically significant levels of PTSS. Multivariate analyses revealed that pandemic fatigue (ß = 0.124, p < 0.001) and AS (ß = 0.212, p < 0.001) were significantly associated with PTSS while controlling for other study variables. Conclusion: Young adults who feel more fatigue related to the COVID-19 pandemic and with high AS should be given access to mental health resources to better manage their mental health and reduce PTSS.
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COVID-19 , Transtornos de Estresse Pós-Traumáticos , Ansiedade/epidemiologia , Ansiedade/psicologia , COVID-19/epidemiologia , Estudos Transversais , Fadiga/epidemiologia , Humanos , Pandemias , República da Coreia/epidemiologia , Transtornos de Estresse Pós-Traumáticos/epidemiologia , Transtornos de Estresse Pós-Traumáticos/psicologia , Estudantes , Universidades , Adulto JovemRESUMO
Methamphetamine (METH) produces increases in the expression of immediate early genes (IEGs) and of histone deacetylase 2 (HDAC2) in the rat nucleus accumbens (NAc). Here, we tested whether HDAC2 deletion influenced the effects of METH on IEG expression in the NAc. Microarray analyses showed no baseline differences in IEG expression between wild-type (WT) and HDAC2 knockout (KO) mice. Quantitative-PCR analysis shows that an acute METH injection produced time-dependent increases in mRNA levels of several IEGs in both genotypes. Interestingly, HDAC2KO mice displayed greater METH-induced increases in Egr1 and Egr2 mRNA levels measured at one hour post-injection. The levels of Fosb, Fra2, Egr1, and Egr3 mRNAs stayed elevated in the HDAC2KO mice 2 hours after the METH injection whereas these mRNAs had normalized in the WT mice. In WT mice, METH caused increased HDAC2 recruitment to the promoters some IEGs at 2 hours post injection. METH-induced prolonged increases in Fosb, Fra2, Egr1, and Egr3 mRNA levels in HDAC2KO mice were associated with increased enrichment of phosphorylated CREB (pCREB) on the promoters of these genes. Based on our observations, we hypothesize that HDAC2 may regulate the expression of these genes, in part, by prolonging the actions of pCREB in the mouse NAc.
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Proteína Quinase Tipo 2 Dependente de Cálcio-Calmodulina/metabolismo , Deleção de Genes , Regulação da Expressão Gênica/efeitos dos fármacos , Genes Precoces , Histona Desacetilase 2/deficiência , Metanfetamina/farmacologia , Núcleo Accumbens/metabolismo , Animais , Proteína de Ligação ao Elemento de Resposta ao AMP Cíclico/metabolismo , Histona Desacetilase 2/metabolismo , Masculino , Camundongos Knockout , Núcleo Accumbens/efeitos dos fármacos , Fosforilação/efeitos dos fármacos , Regiões Promotoras Genéticas/genética , Ligação Proteica/efeitos dos fármacos , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Fatores de Tempo , Fator de Transcrição AP-1/metabolismoRESUMO
Methamphetamine (MA) is a toxic, addictive drug shown to modulate learning and memory, yet the neural mechanisms are not fully understood. We investigated the effects of 2 weekly injections of MA (30 mg/kg) on working memory using the radial 8-arm maze (RAM) across 5 weeks in adolescent-age mice. MA-treated mice show a significant improvement in working memory performance 1 week following the first MA injection compared to saline-injected controls. Following 5 weeks of MA abstinence mice were re-trained on a reference and working memory version of the RAM to assess cognitive flexibility. MA-treated mice show significantly more working memory errors without effects on reference memory performance. The hippocampus and dorsal striatum were assessed for expression of glutamate receptors subunits, GluA2 and GluN2B; dopamine markers, dopamine 1 receptor (D1), dopamine transporter (DAT) and tyrosine hydroxylase (TH); and memory markers, protein kinase M zeta (PKMζ) and protein kinase C zeta (PKCζ). Within the hippocampus, PKMζ and GluA2 are both significantly reduced after MA supporting the poor memory performance. Additionally, a significant increase in GluN2B and decrease in D1 identifies dysregulated synaptic function. In the striatum, MA treatment increased cytosolic DAT and TH levels associated with dopamine hyperfunction. MA treatment significantly reduced GluN2B while increasing both PKMζ and PKCζ within the striatum. We discuss the potential role of PKMζ/PKCζ in modulating dopamine and glutamate receptors after MA treatment. These results identify potential underlying mechanisms for working memory deficits induced by MA.
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The present study investigated whether chronic methamphetamine (METH) would suppress METH-induced mRNA expression of immediate early genes (IEGs) in the rat brain. Rats were given METH or saline over two weeks. After an overnight withdrawal, saline- and METH-pretreated rats received an acute saline or METH challenge. The acute METH challenge increased expression of members of activator protein 1 (AP-1) and Nr4a IEG families in the nucleus accumbens (NAc) and midbrain of saline-pretreated rats. Chronic METH exposure attenuated the effects of acute METH challenge on AP-1 IEG expression in the NAc. However, chronic METH failed to attenuate acute METH-induced increases of Nr4a1 and Nr4a3 expression in the NAc. In contrast to observations in the NAc, chronic METH did not prevent acute METH-induced changes in IEG expression in the midbrain. These results suggest that these two brain regions that are implicated in neuroplastic effects of illicit substances might be differentially affected by psychostimulants.
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A neurotoxic dose of methamphetamine (METH) induces the loss of some striatal neurons. Interestingly, the METH-induced apoptosis in the striatum is immediately followed by the generation of new cells (cytogenesis). In the present study, we investigated the role of the neurokinin-1, dopamine D1 and D2 receptors on the METH-induced cytogenesis. To that end, male mice were given a single injection (30 mg/kg, ip) or a binge of METH (10mg/kg, 4× at two-hour intervals, ip). BrdU (100mg/kg, ip) was given 36 h after the last injection of METH. Newly generated cells were detected by immunohistochemistry and cell counts were performed using unbiased computerized stereology. Either single or binge exposure to METH resulted in the generation of new cells. The single optimized dose was used for subsequent mechanistic studies. Pretreatment with the dopamine D1 receptor antagonist SCH23390 (0.1mg/kg, ip) 30 min prior to METH abrogated the METH-induced striatal cytogenesis. Pretreatment with the dopamine D2 receptor antagonist raclopride (1mg/kg, ip) failed to affect this phenomenon. Finally, pretreatment with the neurokinin-1 receptor antagonist WIN 51,708 (5mg/kg, ip) 30 min prior to METH abrogated the METH-induced cytogenesis. In conclusion, neurokinin-1 and dopamine D1 receptors are required for the METH-induced striatal cytogenesis while the D2 receptor is without effect.
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Estimulantes do Sistema Nervoso Central/administração & dosagem , Corpo Estriado/efeitos dos fármacos , Metanfetamina/administração & dosagem , Neurogênese/efeitos dos fármacos , Receptores Dopaminérgicos/fisiologia , Receptores da Neurocinina-1/fisiologia , Análise de Variância , Androstanos/farmacologia , Animais , Benzazepinas/farmacologia , Benzimidazóis/farmacologia , Bromodesoxiuridina/metabolismo , Proliferação de Células/efeitos dos fármacos , Agonistas de Dopamina/farmacologia , Antagonistas de Dopamina/farmacologia , Vias de Administração de Medicamentos , Masculino , Camundongos , Camundongos Endogâmicos ICR , Antagonistas dos Receptores de Neurocinina-1 , Racloprida/farmacologiaRESUMO
We previously demonstrated that hormone treatments which stimulate female-directed singing increased levels and turnover of dopamine (DA) in brain areas controlling the motor patterning of song. To help determine how DA affects singing, we quantified the effects of treating adult male finches with the D1/D2 receptor antagonist cis-flupenthixol. Adult males were given subcutaneous silastic implants of androgen, in case drug treatment interfered with androgen secretion. One week later, they were tested with females. Males were divided into three groups matched for levels of courtship singing. Males were then subcutaneously implanted with osmotic minipumps containing either saline, a low, or a high dose of cis-flupenthixol. Each male was tested with a different female 5 and 10 days after implantation to determine how this D1/D2 receptor antagonist affected behavior. Both drug doses affected female-directed singing 5 days after initiation of treatment. High-dose males sang to females significantly less often than males in the other two groups. Low-dose males showed fewer high-intensity courtship displays in which males dance towards females as they sing. These effects on courtship singing were not seen at day 10, though other behavioral effects were seen at this time. Male beak wipes, rocks, following females and female withdrawals from males were also affected by drug treatment. General activity in the home cage was decreased by day 11. These data demonstrate that singing and several other female-directed behaviors are sensitive to perturbations in DA receptor function.