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The persistence of latent viral genomes in people receiving antiretroviral therapy (ART) is the main obstacle to a cure for human immunodeficiency virus (HIV) infection. Viral reservoirs can be defined as cells harboring HIV genomes that have the ability to produce infectious virions. Precise quantification of the cellular reservoirs of HIV is challenging because these cells are rare, heterogeneous, and outnumbered by a larger number of cells carrying defective genomes. In addition, measuring the inducibility of these proviruses requires functional assays and remains technically difficult. The recent development of single-cell and single-viral genome approaches revealed additional layers of complexity: the cell subsets that harbor proviruses are heterogeneous and their ability to be induced is variable. A substantial fraction of intact HIV genomes may be permanently silenced after years of ART, revealing the underappreciated importance of induction assays. As such, a simple approach that would assess simultaneously the genetic intactness and the inducibility of the reservoir is still lacking. In this study, we review recent advances in the development of methods to quantify and characterize persistently infected cells, and we discuss how these findings can inform the design of future assays aimed at measuring the size of the intact and inducible HIV reservoir.
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Infecciones por VIH , VIH , Humanos , VIH/genética , Linfocitos T CD4-Positivos , Antirretrovirales/uso terapéutico , Provirus/genética , Latencia del Virus , Carga ViralRESUMEN
Background: Bullying is a multifaceted problem with many consequences. Aim: This study aimed to determine the psychiatric morbidity of children involved in bullying, either as bullies or victims, treated at the Child and Adolescent Mental Health Care Centre of the Free State Psychiatric Complex (FSPC). Setting: Free State Psychiatric Complex, Bloemfontein, South Africa. Methods: This retrospective cross-sectional study included children under 18 years treated at the FSPC Care Centre between January and September 2017. Information was extracted from patient files. Results: Of 288 patients, 98 (34.0%) were involved in bullying: 66 were bullies, 28 victims, 3 bully-victims, and 1 unspecified. For gender and family structure, there were no statistically significant differences between children involved and those not involved in bullying and between bullies and victims. Almost all bullies (95.4%) had aggression as presenting complaint compared with 39.3% of the victims (p < 0.01). Statistically significantly more victims, than bullies, reported sadness (21.4%, 4.6%, p = 0.02). Attention deficit/hyperactivity disorder (ADHD) was diagnosed in most children, both involved (73.5%) and not involved (63.2%). Statistically significant differences for the presence of conduct disorder were found between children involved and those not involved in bullying (31.6%, 10.0%, p < 0.01) and between bullies and victims (39.4%, 14.3%, p = 0.02). Conclusion: The prevalence of conduct disorder diagnosis was more common in bullies than in victims and those involved in bullying as opposed to those not involved. Contribution: Psychiatric information of bullying victims and perpetrators in the Free State, which had a high prevalence of bullying in a national survey.
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BACKGROUND: Patients with COVID-19 (COVID) may develop acute respiratory distress syndrome with or without sepsis, coagulopathy and visceral damage. While chest CT scans are routinely performed in the initial assessment of patients with severe pulmonary forms, thymus involvement and reactivation have not been investigated so far. METHODS: In this observational study, we systematically scored the enlargement of the thymus and the lung involvement, using CT scans, in all adult patients admitted to the ICU for COVID or any other cause (control group) at one centre between March and April 2020. Initial biological investigations included nasal detection of SARS-CoV-2 ribonucleic acid by polymerase chain reaction (PCR). In a subgroup of 24 patients with different degrees of pulmonary involvement and thymus hypertrophy, plasma cytokine concentrations were measured and the export of mature T cells from the thymus was estimated simultaneously by PCR quantification of T cell receptor excision circles (TRECs). RESULTS: Eighty-seven patients were studied: 50 COVID patients and 37 controls. Non-atrophic or enlarged thymus was more commonly observed in COVID patients than in controls (66% vs. 24%, p < 0.0001). Thymus enlargement in COVID patients was associated with more extensive lung injury score on CT scans (4 [3-5] vs. 2 [1.5-4], p = 0.01), but a lower mortality rate (8.6% vs. 41.2%, p < 0.001). Other factors associated with mortality were age, lymphopaenia, high CRP and co-morbidities. COVID patients had higher concentrations of IL-7 (6.00 [3.72-9.25] vs. 2.17 [1.76-4.4] pg/mL; p = 0.04) and higher thymic production of new lymphocytes (sj/ßTREC ratio = 2.88 [1.98-4.51] vs. 0.23 [0.15-0.60]; p = 0.004). Thymic production was also correlated with the CT scan thymic score (r = 0.38, p = 0.03) and inversely correlated with the number of lymphocytes (r = 0.56, p = 0.007). CONCLUSION: In COVID patients, thymus enlargement was frequent and associated with increased T lymphocyte production, which appears to be a beneficial adaptation to virus-induced lymphopaenia. The lack of thymic activity/reactivation in older SARS-CoV-2 infected patients could contribute to a worse prognosis.
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COVID-19/complicaciones , Síndrome de Dificultad Respiratoria/virología , Hiperplasia del Timo/diagnóstico por imagen , Anciano , Estudios de Casos y Controles , Femenino , Hospitalización , Humanos , Unidades de Cuidados Intensivos , Masculino , Persona de Mediana Edad , Tórax/diagnóstico por imagen , Hiperplasia del Timo/virología , Tomografía Computarizada por Rayos XRESUMEN
The aim of this study was to determine the prevalence of mental disorders among offenders admitted at the health establishments in Bizzah Makhathe Correctional Centre, South Africa. Structured psychiatric interviews were conducted to elicit the information. The majority of the participants were young male Africans with low educational levels and poor socio-economic status. Crimes against human beings were the most common ones committed by the offenders. The lifetime prevalence of mental disorders was 54.7%. Personality disorders, followed by substance and addictive disorders, were the most prominent disorders among the study sample. Other psychiatric disorders noted were depressive disorders, schizophrenia, intellectual disabilities and neurocognitive disorders. The results show that mental disorders in prisons go undetected and untreated, meaning that competency to stand trial and criminal responsibility are not always observed. There is a need to conduct more empirical studies on the prevalence and incidences of mental disorders in South African prisons.
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The study investigated demographic, clinical and forensic characteristics of alleged offenders referred for forensic assessment. A data collection form was used to gather information from 155 offenders' clinical records. The subjects were mainly young males, aged between 18 and 35 years, with low educational levels and high unemployment rate. The most common diagnoses were substance-related and addictive disorders, and schizophrenia spectrum and other psychotic disorders. A sizeable number of offenders were diagnosed with an intellectual disability. The comorbidity of other medical conditions such as epilepsy and HIV/AIDS was also noteworthy. In total, 55.5% of the offenders were found competent to stand trial, and 46.5% were declared criminally responsible. Offenders presenting with schizophrenia and intellectual disabilities were often declared incompetent to stand trial and were generally not responsible for alleged crimes. There was association between adjudicative competence and criminal responsibility. The results highlight effect of substances on mental illness and crime.
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Background: During the COVID-19 pandemic, South African psychologists started to use telepsychology to continue providing services. However, diverse factors may influence psychologists' decisions regarding the use of telepsychology. Aim: To investigate South African psychologists' experiences with using telepsychology during the COVID-19 pandemic. Setting: Health Professions Council of South Africa (HPCSA)-registered psychologists practising in South Africa. Methods: A quantitative, cross-sectional study was conducted. Psychologists were invited to complete an online survey on the REDCap platform. Convenience sampling was used for respondent selection (n = 179). The study explored demographic variables, telepsychology use, changes in psychotherapy format, guidelines, ethical considerations, training, socio-economic factors, and individual patient and psychotherapist factors. Descriptive statistics, including categorical variables (frequencies and percentages) and numerical variables (medians and percentiles) were utilised for the data analysis. A bivariate analysis with backward selection was subsequently used, and significant variables were integrated into the logistic regression model. Results: Most respondents (84.8%) used telepsychology, with 72.8% considering it a positive experience. Private psychologists used electronic means for delivering services significantly more than public sector psychologists. The public sector psychologists had more challenges relating to changes in the therapeutic format, additional training requirements and technology access. Conclusion: During the COVID-19 pandemic, psychologists turned to telepsychology as a valuable tool for providing services while navigating the unique challenges it presented. Contribution: This study provides insights into the utility of telepsychology in the South African context during COVID-19. It underscores the experiences, importance of guidelines, and needs regarding training and technology access among psychologists.
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AIMS: (1) To describe the frequency of somatic pathologies and depression among former anorexia nervosa (AN) patients; (2) to study links with subjects' clinical history and global outcomes. METHODS: 97 women hospitalised for AN during adolescence, 9.00 ± 1.92 years previously, were interviewed using structured questionnaires concerning somatic and psychiatric disorders that they had experienced. RESULTS: Iron deficiency, migraine, cystitis, upper digestive system disorders, fractures, osteoporosis, and dental problems were reported with a frequency >20 %. Depression was reported by 2/3 of the sample. Osteoporosis was 14 times more frequent in case of vitamin D deficiency. Fractures were three times more frequent in presence of osteoporosis and less frequent when the overall outcome was better. CONCLUSION: Among women who had AN in adolescence, somatic comorbidities are frequent in adulthood. They are linked to the severity and the duration of AN, and to the overall outcome of the subject.
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Anorexia Nerviosa/complicaciones , Trastorno Depresivo/complicaciones , Osteoporosis/complicaciones , Fracturas Osteoporóticas/complicaciones , Encuestas y Cuestionarios , Adolescente , Adulto , Anorexia Nerviosa/psicología , Anorexia Nerviosa/terapia , Trastorno Depresivo/psicología , Femenino , Estudios de Seguimiento , Hospitalización , Humanos , Osteoporosis/psicología , Fracturas Osteoporóticas/psicología , Adulto JovenRESUMEN
Unintegrated HIV DNA represents between 20% and 35% of the total viral DNA in infected patients. Only the linear forms (unintegrated linear DNAs [ULDs]) can be substrates for integration and for the completion of a full viral cycle. In quiescent cells, these ULDs may be responsible for pre-integrative latency. However, their detection remains difficult due to the lack of specificity and sensitivity of existing techniques. We developed an ultra-sensitive, specific, and high-throughput technology for ULD quantification called DUSQ (DNA ultra-sensitive quantification) combining linker-mediated PCR and next-generation sequencing (NGS) using molecular barcodes. Studying cells with different activity levels, we determined that the ULD half-life goes up to 11 days in resting CD4+ T cells. Finally, we were able to quantify ULDs in samples from patients infected with HIV-1, providing a proof of concept for the use of DUSQ in vivo to track pre-integrative latency. DUSQ can be adapted to the detection of other rare DNA molecules.
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Seropositividad para VIH , VIH-1 , Humanos , ADN Viral/genética , Tecnología , División Celular , VIH-1/genéticaRESUMEN
Thymic activation improves the outcome of COVID-19 patients with severe pneumonia. The rs2204985 genetic polymorphism within the TCRA-TCRD locus, which affects thymic output in healthy individuals, was found here to modify SARS-CoV-2-specific immunity and disease severity in COVID-19 patients with severe pneumonia. Forty patients with severe COVID-19 pneumonia were investigated. The GG genotype at the rs2204985 locus was associated, independently of age and sex, with stronger and long-lasting anti-SARS-CoV-2 helper and cytotoxic T cell responses 6 months after recovery. The GG genotype was also associated with less severe lung involvement, higher thymic production, and higher counts of blood naïve T lymphocytes, including recent thymic emigrants, and a larger population of activated stem cell memory CD4+ T cells. Overall, GG patients developed a more robust and sustained immunity to SARS-CoV-2. Polymorphism at rs2204985 locus should be considered as an additional predictive marker of anti-SARS-CoV-2 immune response.