[Digital health in Latin America: current legislation and ethical aspectsSaúde digital na América Latina: legislação atual e aspectos éticos]. / Salud digital en América Latina: legislación actual y aspectos éticos.

Objectives: Describe the current legislation on electronic medical records (EMR) and telehealth in Latin American countries and analyze the treatment of confidentiality and professional secrecy. Methods: Between March and September 2022, a survey of the regulations in force in 21 Latin American countries was conducted at two levels: the existence of legislation on EMR and telehealth, and the treatment of confidentiality and professional secrecy in EMR and telehealth. A data extraction form was prepared for each country. Data were collected from official on-line sources. The information was analyzed qualitatively and synthesized in tables when possible. Results: The use of EMR is legally regulated in 16 countries. Nineteen countries have legislation on telehealth. All the countries analyzed safeguard confidentiality and professional secrecy through regulations. However, confidentiality and professional secrecy are mentioned in 11 countries in the context of telehealth, and in only nine countries in the context of EMR. Conclusions: Since the start of this century, Latin America has made progress in the legislation of digital tools for health care, such as EMR and telehealth. There is also interest in ethical issues related to the use of EMR and telehealth, particularly confidentiality and professional secrecy, aspects that should be strengthened in digital health.

Objetivo: Descrever a legislação vigente sobre prontuários eletrônicos e telessaúde nos países da América Latina e analisar o tratamento da confidencialidade e do sigilo profissional. Métodos: Entre março e setembro de 2022, realizou-se um levantamento sobre a regulamentação vigente nos 21 países latino-americanos incluídos no estudo, em dois níveis: i) existência de legislação sobre prontuários eletrônicos e telessaúde; e ii) tratamento da confidencialidade e do sigilo profissional em prontuários eletrônicos e telessaúde. Uma planilha para extração de dados foi elaborada para cada país. Os dados foram coletados de fontes oficiais disponíveis on-line. Foi realizada uma análise qualitativa das informações, que foram resumidas em tabelas, quando possível. Resultados: O uso dos prontuários eletrônicos é legalmente regulamentado em 16 países. Quanto à telessaúde, 19 países têm legislação sobre essa ferramenta. Todos os países analisados protegem a confidencialidade e o sigilo profissional por meio de regulamentação. No entanto, no contexto da telessaúde, eles são mencionados em 11 países; já no contexto dos prontuários eletrônicos, em apenas 9 países. Conclusões: Desde o início dos anos 2000, a América Latina vem avançando em relação à legislação sobre ferramentas digitais na atenção à saúde, como prontuários eletrônicos e telessaúde. Há também interesse nas questões éticas relacionadas ao uso de prontuários eletrônicos e telessaúde, especialmente em relação à confidencialidade e ao sigilo profissional, embora esses aspectos precisem ser reforçados na saúde digital.

BMAL1 loss in oligodendroglia contributes to abnormal myelination and sleep.

Myelination depends on the maintenance of oligodendrocytes that arise from oligodendrocyte precursor cells (OPCs). We show that OPC-specific proliferation, morphology, and BMAL1 are time-of-day dependent. Knockout of Bmal1 in mouse OPCs during development disrupts the expression of genes associated with circadian rhythms, proliferation, density, morphology, and migration, leading to changes in OPC dynamics in a spatiotemporal manner. Furthermore, these deficits translate into thinner myelin, dysregulated cognitive and motor functions, and sleep fragmentation. OPC-specific Bmal1 loss in adulthood does not alter OPC density at baseline but impairs the remyelination of a demyelinated lesion driven by changes in OPC morphology and migration. Lastly, we show that sleep fragmentation is associated with increased prevalence of the demyelinating disorder multiple sclerosis (MS), suggesting a link between MS and sleep that requires further investigation. These findings have broad mechanistic and therapeutic implications for brain disorders that include both myelin and sleep phenotypes.

Hyperexcitable arousal circuits drive sleep instability during aging.

Sleep quality declines with age; however, the underlying mechanisms remain elusive. We found that hyperexcitable hypocretin/orexin (Hcrt/OX) neurons drive sleep fragmentation during aging. In aged mice, Hcrt neurons exhibited more frequent neuronal activity epochs driving wake bouts, and optogenetic activation of Hcrt neurons elicited more prolonged wakefulness. Aged Hcrt neurons showed hyperexcitability with lower KCNQ2 expression and impaired M-current, mediated by KCNQ2/3 channels. Single-nucleus RNA-sequencing revealed adaptive changes to Hcrt neuron loss in the aging brain. Disruption of Kcnq2/3 genes in Hcrt neurons of young mice destabilized sleep, mimicking aging-associated sleep fragmentation, whereas the KCNQ-selective activator flupirtine hyperpolarized Hcrt neurons and rejuvenated sleep architecture in aged mice. Our findings demonstrate a mechanism underlying sleep instability during aging and a strategy to improve sleep continuity.

Metabolic insights from a GHSR-A203E mutant mouse model.

OBJECTIVE: Binding of ghrelin to its receptor, growth hormone secretagogue receptor (GHSR), stimulates GH release, induces eating, and increases blood glucose. These processes may also be influenced by constitutive (ghrelin-independent) GHSR activity, as suggested by findings in short people with naturally occurring GHSR-A204E mutations and reduced food intake and blood glucose in rodents administered GHSR inverse agonists, both of which impair constitutive GHSR activity. In this study, we aimed to more fully determine the physiologic relevance of constitutive GHSR activity. METHODS: We generated mice with a GHSR mutation that replaces alanine at position 203 with glutamate (GHSR-A203E), which corresponds to the previously described human GHSR-A204E mutation, and used them to conduct ex vivo neuronal electrophysiology and in vivo metabolic assessments. We also measured signaling within COS-7 and HEK293T cells transfected with wild-type GHSR (GHSR-WT) or GHSR-A203E constructs. RESULTS: In COS-7 cells, GHSR-A203E resulted in lower baseline IP3 accumulation than GHSR-WT; ghrelin-induced IP3 accumulation was observed in both constructs. In HEK293T cells co-transfected with voltage-gated CaV2.2 calcium channel complex, GHSR-A203E had no effect on basal CaV2.2 current density while GHSR-WT did; both GHSR-A203E and GHSR-WT inhibited CaV2.2 current in the presence of ghrelin. In cultured hypothalamic neurons from GHSR-A203E and GHSR-deficient mice, native calcium currents were greater than those in neurons from wild-type mice; ghrelin inhibited calcium currents in cultured hypothalamic neurons from both GHSR-A203E and wild-type mice. In brain slices, resting membrane potentials of arcuate NPY neurons from GHSR-A203E mice were hyperpolarized compared to those from wild-type mice; the same percentage of arcuate NPY neurons from GHSR-A203E and wild-type mice depolarized upon ghrelin exposure. The GHSR-A203E mutation did not significantly affect body weight, body length, or femur length in the first ∼6 months of life, yet these parameters were lower in GHSR-A203E mice after 1 year of age. During a 7-d 60% caloric restriction regimen, GHSR-A203E mice lacked the usual marked rise in plasma GH and demonstrated an exaggerated drop in blood glucose. Administered ghrelin also exhibited reduced orexigenic and GH secretagogue efficacies in GHSR-A203E mice. CONCLUSIONS: Our data suggest that the A203E mutation ablates constitutive GHSR activity and that constitutive GHSR activity contributes to the native depolarizing conductance of GHSR-expressing arcuate NPY neurons. Although the A203E mutation does not block ghrelin-evoked signaling as assessed using in vitro and ex vivo models, GHSR-A203E mice lack the usual acute food intake response to administered ghrelin in vivo. The GHSR-A203E mutation also blunts GH release, and in aged mice leads to reduced body length and femur length, which are consistent with the short stature of human carriers of the GHSR-A204E mutation.

Salud digital en América Latina: legislación actual y aspectos éticos / Digital health in Latin America: current legislation and ethical aspects / Saúde digital na América Latina: legislação atual e aspectos éticos

RESUMEN Objetivo. Describir la legislación vigente respecto a historia clínica electrónica (HCE) y telesalud de los países latinoamericanos y analizar el tratamiento de la confidencialidad y el secreto profesional. Métodos. Entre marzo y septiembre de 2022, se realizó un relevamiento de la reglamentación vigente en los 21 países latinoamericanos en estudio, en dos niveles: i) la existencia de legislación respecto a la HCE y la telesalud, y ii) el tratamiento de la confidencialidad y el secreto profesional en la HCE y la telesalud. Se confeccionó una ficha de extracción de datos por país. Se recolectaron datos a partir de fuentes on-line oficiales. Se analizó cualitativamente la información y se sintetizó en forma de tablas cuando fue posible. Resultados. El uso de la HCE está reglamentado legalmente en 16 países. Para el caso de telesalud, son 19 países los que cuentan con legislación en referencia a esta herramienta. Todos los países analizados resguardan la confidencialidad y el secreto profesional a través de reglamentaciones. Sin embargo, en el contexto de telesalud se mencionan en 11 países, en tanto en el contexto de la HCE, solo en 9 países. Conclusiones. Desde el inicio del segundo milenio América Latina ha avanzado respecto a la legislación de herramientas digitales en la atención en salud como la HCE y la telesalud. Se observa a su vez un interés por las cuestiones éticas relacionadas con el uso de la HCE y la telesalud, en particular de la confidencialidad y secreto profesional, aunque dichos aspectos deben ser fortalecidos en la salud digital.

ABSTRACT Objectives. Describe the current legislation on electronic medical records (EMR) and telehealth in Latin American countries and analyze the treatment of confidentiality and professional secrecy. Methods. Between March and September 2022, a survey of the regulations in force in 21 Latin American countries was conducted at two levels: the existence of legislation on EMR and telehealth, and the treatment of confidentiality and professional secrecy in EMR and telehealth. A data extraction form was prepared for each country. Data were collected from official on-line sources. The information was analyzed qualitatively and synthesized in tables when possible. Results. The use of EMR is legally regulated in 16 countries. Nineteen countries have legislation on telehealth. All the countries analyzed safeguard confidentiality and professional secrecy through regulations. However, confidentiality and professional secrecy are mentioned in 11 countries in the context of telehealth, and in only nine countries in the context of EMR. Conclusions. Since the start of this century, Latin America has made progress in the legislation of digital tools for health care, such as EMR and telehealth. There is also interest in ethical issues related to the use of EMR and telehealth, particularly confidentiality and professional secrecy, aspects that should be strengthened in digital health.

RESUMO Objetivo. Descrever a legislação vigente sobre prontuários eletrônicos e telessaúde nos países da América Latina e analisar o tratamento da confidencialidade e do sigilo profissional. Métodos. Entre março e setembro de 2022, realizou-se um levantamento sobre a regulamentação vigente nos 21 países latino-americanos incluídos no estudo, em dois níveis: i) existência de legislação sobre prontuários eletrônicos e telessaúde; e ii) tratamento da confidencialidade e do sigilo profissional em prontuários eletrônicos e telessaúde. Uma planilha para extração de dados foi elaborada para cada país. Os dados foram coletados de fontes oficiais disponíveis on-line. Foi realizada uma análise qualitativa das informações, que foram resumidas em tabelas, quando possível. Resultados. O uso dos prontuários eletrônicos é legalmente regulamentado em 16 países. Quanto à telessaúde, 19 países têm legislação sobre essa ferramenta. Todos os países analisados protegem a confidencialidade e o sigilo profissional por meio de regulamentação. No entanto, no contexto da telessaúde, eles são mencionados em 11 países; já no contexto dos prontuários eletrônicos, em apenas 9 países. Conclusões. Desde o início dos anos 2000, a América Latina vem avançando em relação à legislação sobre ferramentas digitais na atenção à saúde, como prontuários eletrônicos e telessaúde. Há também interesse nas questões éticas relacionadas ao uso de prontuários eletrônicos e telessaúde, especialmente em relação à confidencialidade e ao sigilo profissional, embora esses aspectos precisem ser reforçados na saúde digital.

Constitutive and ghrelin-dependent GHSR1a activation impairs CaV2.1 and CaV2.2 currents in hypothalamic neurons.

The growth hormone secretagogue receptor type 1a (GHSR1a) has the highest known constitutive activity of any G protein-coupled receptor (GPCR). GHSR1a mediates the action of the hormone ghrelin, and its activation increases transcriptional and electrical activity in hypothalamic neurons. Although GHSR1a is present at GABAergic presynaptic terminals, its effect on neurotransmitter release remains unclear. The activities of the voltage-gated calcium channels, CaV2.1 and CaV2.2, which mediate neurotransmitter release at presynaptic terminals, are modulated by many GPCRs. Here, we show that both constitutive and agonist-dependent GHSR1a activity elicit a strong impairment of CaV2.1 and CaV2.2 currents in rat and mouse hypothalamic neurons and in a heterologous expression system. Constitutive GHSR1a activity reduces CaV2 currents by a Gi/o-dependent mechanism that involves persistent reduction in channel density at the plasma membrane, whereas ghrelin-dependent GHSR1a inhibition is reversible and involves altered CaV2 gating via a Gq-dependent pathway. Thus, GHSR1a differentially inhibits CaV2 channels by Gi/o or Gq protein pathways depending on its mode of activation. Moreover, we present evidence suggesting that GHSR1a-mediated inhibition of CaV2 attenuates GABA release in hypothalamic neurons, a mechanism that could contribute to neuronal activation through the disinhibition of postsynaptic neurons.