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BACKGROUND: While female ejaculation is viewed as a potential enhancer of women's sexual experiences and their relationships with their sexual partners, existing studies to date emphasize the need for further exploration of the squirting phenomenon. AIM: The study sought to explore experiences and perceptions about the phenomenon of squirting in young adult women. METHODS: A descriptive qualitative study was conducted. Semi-structured, in-depth interviews were conducted between December 2022 and March 2023. Seventeen young adult women who experienced squirting were recruited using a convenience and snowball sampling. ATLAS.ti v.9 software was used for a thematic analysis of the interview data. The study adhered to the recommendations for reporting qualitative research (Standards for Reporting Qualitative Research). OUTCOMES: The outcomes included (1) exploring factors influencing initial squirting experiences, (2) insights gained through squirting experiences, (3) communication as the cornerstone in sexual relationships, and (4) resources and sources for knowledge on the squirting phenomenon. RESULTS: After the analysis of the results, the following subthemes emerged: (1) first perceptions on squirting, (2) facilitating factors, (3) physical sensations and psychological aspects in squirting experience, (4) sources of information about squirting and (5) addressing squirting in comprehensive sex education. CLINICAL IMPLICATIONS: Frontline healthcare providers should undergo specific training to address anxiety related to squirting among certain individuals and enhance societal awareness while offering emotional support for diverse sexual response variations. STRENGTHS AND LIMITATIONS: Acknowledging limitations in our study of young women's experiences with squirting, a more diverse sample could provide alternative insights. Despite this, our findings contribute valuable knowledge, suggesting avenues for professional training to promote sexual and reproductive health in a more realistic and sensitive manner. CONCLUSION: This study explored the emotional and psychological effects of squirting on women's sexual experiences, ranging from heightened arousal to feelings of humiliation and embarrassment. It emphasized the importance of a partner's reaction in interpreting the event and the limited understanding of squirting, often influenced by pornography.
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Pesquisa Qualitativa , Humanos , Feminino , Adulto Jovem , Adulto , Comportamento Sexual/psicologia , Parceiros Sexuais/psicologia , Entrevistas como Assunto , Educação Sexual/métodosRESUMO
The occurrence of preterm birth is correlated with the potential emergence of disabilities in children. Early intervention programs are designed to promote better developmental outcomes. These interventions employ family-centered methodologies, wherein parents are instructed to facilitate neurodevelopment, thereby promoting heightened involvement of the child in their daily activities. The objective of this investigation was to evaluate the efficacy of early family-based interventions on motor, cognitive, and language development. A systematic review and meta-analysis was conducted utilizing the databases PubMed, Medline, PEDro, Scopus, CINAHL Complete, SciELO, and Open Grey. The search terms utilized included NDT (neuro-developmental treatment), Bobath, neurodevelopmental therapy, parents administered, family administered, physical therapy modalities, early intervention (educational), early intervention, premature infant, preterm, and premature. Randomized clinical trials and observational studies written in English or Spanish were taken into consideration. The initial search resulted in 420 articles. After removing duplicates and applying the selection criteria, 12 articles were selected for the systematic review and 5 articles were selected for the meta-analysis. The meta-analysis revealed a significant association between early intervention and enhanced cognitive function (p = 0.01) in this study. Additionally, the meta-analysis indicated improvements resulting from early family-based intervention (p = 0.02) in motor function. Early motor interventions that emphasize parent involvement and education in neurodevelopment show significant outcomes in motor and cognitive areas at 2 years of age in very premature or extremely premature infants. However, inconclusive effects have been found in the language area, which is the least studied domain. Due to the methodological heterogeneity observed, further research is needed to establish conclusive decisions regarding the administration of these interventions and the determination of key evaluation periods.
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AIM: To understand the factors that contribute to the risk of suicide among lesbian, gay, bisexual, transgender, queer, intersex and asexual (sexual minorities) youth. BACKGROUND: The increase in the likelihood of suicide has made it an urgent issue in public health, particularly among young people, where it now ranks as the fourth leading cause of death. This issue becomes even more significant when focusing on sexual minorities. METHODS: A cross-sectional study was performed in targeted young individuals (15-29 years). Several variables were assessed, including suicide risk, self-esteem, presence and severity of depressive symptoms, perceived social support and self-reported levels of anxiety and depression. RESULTS: Statistically significant disparities were observed in suicide risk, presence of depressive symptoms and self-reported levels of anxiety and depression, all of which were more pronounced in sexual minority youth compared to heterosexual cisgender individuals. Likewise, statistically significant differences were noted concerning self-esteem and family support, both of which were lower in sexual minority youth. CONCLUSION: This study has identified risk factors, such as anxiety, depression and limited social support, as well as protective factors, like higher self-esteem and self-concept. Understanding and addressing all these factors are essential in reducing the elevated rates of suicide among sexual minority youth. Consequently, evidence-based interventions such as Gender and Sexuality Alliances, which empower and create safe spaces for sexual minority youth, possess substantial potential for effectively addressing this issue. IMPLICATIONS FOR THE PROFESSION: Given sexual minorities vulnerability, healthcare pros, especially nurses, must grasp suicide risk factors. They can help by educating, offering care, assessing risk and fighting stigma. This guarantees safety and access to mental health services for at-risk individuals from sexual minorities. REPORTING METHOD: The reporting follows the STROBE checklist. PATIENT CONTRIBUTION: People who were invited to participate voluntarily completed a range of questionnaires.
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Background and Objectives: Autism spectrum disorder (ASD) is a neurodevelopmental condition characterized by challenges in communication, social interactions, and repetitive behaviors. Although the factors that influence the development of this condition are unknown, certain chemical compounds such as pesticides have been proposed as possible contributors. Due to the lack of an established causal link between pesticide exposure and ASD, this study aimed to evaluate this potential association. Materials and Methods: A case-control study was carried out to ascertain the prevalence and risk associated with ASD in relation to pesticide exposure over a 21-year study period (2000-2021). Results: We included 2821 individuals diagnosed with ASD residing in areas of both high and low pesticide exposure in southern Spain. There was a rise in the ASD prevalence rate in regions with elevated pesticide use when compared to regions with low use [odds ratio (OR): 1.34, 95% confidence interval (CI), (1.24-1.44)]. Notably, men had the highest likelihood, with an OR: 1.42, 95% CI, (1.30-1.55). Furthermore, after performing multiple binary logistic regression adjusted for age, sex, and geographical area, males exhibited a higher likelihood compared to females [OR: 2.41, 95% CI, (2.21-2.62)]. Conclusions: Overall, this research suggests a connection between heightened environmental pesticide exposure due to increased agricultural use and autism.
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Transtorno do Espectro Autista , Transtorno Autístico , Praguicidas , Masculino , Feminino , Humanos , Praguicidas/toxicidade , Transtorno do Espectro Autista/induzido quimicamente , Transtorno do Espectro Autista/epidemiologia , Estudos de Casos e Controles , Exposição Ambiental/efeitos adversosRESUMO
AIM: To explore the experiences and perceptions of final-year nursing students in assessing and managing acute pesticide poisoning using a socio-environmental care approach in a primary health care simulation-based scenario. DESIGN: A qualitative descriptive study was conducted using focus groups. METHODS: Twelve focus groups were held, with 114 fourth-year nursing students. The study was carried out from September to November 2021. To grant an in-depth analysis of the collected data, a thematic analysis was used. RESULTS: After our data analysis, three main themes emerged: (i) experiences of an acute pesticide poisoning case in a simulation-based scenario; (ii) environmental health nursing competencies for a culturally competent practice and (iii) social factors in prevention strategies. CONCLUSIONS: Using a socio-environmental care approach with a primary care simulation-based poisoning case can provide a realistic public health clinical experience for local problems and prepare the context for the development of global citizenship values, as well as offer numerous opportunities to facilitate transformative learning, including Sustainable Development Goals (SDGs) into local nursing clinical practice. IMPACT: Nurse managers, policymakers and educators must collaborate together to broaden their reach in teaching the role of the environment and social determinants of health through evidence-based care models, as well as actively contributing to the achievement of the SDGs to promote "glocal" competencies among nursing professionals.
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Bacharelado em Enfermagem , Praguicidas , Estudantes de Enfermagem , Humanos , Grupos Focais , Pesquisa Qualitativa , Aprendizagem , Estudantes de Enfermagem/psicologiaRESUMO
Impaired glucose homeostasis in obesity is mitigated by enhancing the glucoregulatory actions of glucagon-like peptide 1 (GLP-1), and thus, strategies that improve GLP-1 sensitivity and secretion have therapeutic potential for the treatment of type 2 diabetes. This study shows that Holdemanella biformis, isolated from the feces of a metabolically healthy volunteer, ameliorates hyperglycemia, improves oral glucose tolerance and restores gluconeogenesis and insulin signaling in the liver of obese mice. These effects were associated with the ability of H. biformis to restore GLP-1 levels, enhancing GLP-1 neural signaling in the proximal and distal small intestine and GLP-1 sensitivity of vagal sensory neurons, and to modify the cecal abundance of unsaturated fatty acids and the bacterial species associated with metabolic health. Our findings overall suggest the potential use of H biformis in the management of type 2 diabetes in obesity to optimize the sensitivity and function of the GLP-1 system, through direct and indirect mechanisms.
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Diabetes Mellitus Tipo 2/metabolismo , Diabetes Mellitus Tipo 2/microbiologia , Firmicutes/fisiologia , Peptídeo 1 Semelhante ao Glucagon/metabolismo , Camundongos Obesos/metabolismo , Camundongos Obesos/microbiologia , Animais , Glicemia/metabolismo , Modelos Animais de Doenças , Gluconeogênese/fisiologia , Glucose/metabolismo , Teste de Tolerância a Glucose/métodos , Hiperglicemia/metabolismo , Insulina/metabolismo , Camundongos , Camundongos Endogâmicos C57BL , Obesidade/metabolismo , Obesidade/microbiologiaRESUMO
Aging is a process that includes changes in cognitive and emotional functions, as well as changes in the diversity and integrity of gut microbiota. Probiotic treatments have recently been studied as a potential new therapeutic approach to alleviate a wide range of problems in other populations; however, clinical studies in older adults remain insufficient and limited. Thus, the aim of this project is to evaluate the efficacy of a multispecies probiotic formulation as a therapeutic strategy for attenuating the emotional and cognitive decline associated with aging in adults over the age of 55. This is a double-blind randomized placebo-controlled crossover trial involving at least 32 older adults and comparing two conditions: (a) probiotic, providing a multispecies probiotic for 10 weeks (Lactobacillus rhamnosus and Bifidobacterium lactis); and (b) placebo, receiving a harmless substance (potato starch). Despite the increasing use of probiotics for the treatment of cognitive and emotional problems, no study has yet focused on this group, to the best of our knowledge. Therapeutic strategies of the kind outlined in this protocol will help to shed light on the current state of knowledge about this topic, as well as promote health programs tailored to this population, which would encourage active aging and healthy lifestyles. Not only do we expect improvements in the emotional dimension in terms of anxiety, stress, depression, and sleep quality, we also expect improvements in the cognitive dimension in terms of attention, memory, and decreased impulsivity.
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Microbioma Gastrointestinal , Probióticos , Idoso , Cognição , Estudos Cross-Over , Método Duplo-Cego , Promoção da Saúde , Humanos , Probióticos/farmacologia , Probióticos/uso terapêutico , Ensaios Clínicos Controlados Aleatórios como AssuntoRESUMO
Years before the first two-pore domain potassium channel (K2P) was cloned, certain ion channels had already been demonstrated to be present in the heart with characteristics and properties usually attributed to the TREK channels (a subfamily of K2P channels). K2P channels were later detected in cardiac tissue by RT-PCR, although the distribution of the different K2P subfamilies in the heart seems to depend on the species analyzed. In order to collect relevant information in this regard, we focus here on the TWIK, TASK and TREK cardiac channels, their putative roles in cardiac physiology and their implication in coronary pathologies. Most of the RNA expression data and electrophysiological recordings available to date support the presence of these different K2P subfamilies in distinct cardiac cells. Likewise, we show how these channels may be involved in certain pathologies, such as atrial fibrillation, long QT syndrome and Brugada syndrome.
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Miocárdio/metabolismo , Canais de Potássio de Domínios Poros em Tandem/metabolismo , Animais , Cardiopatias/metabolismo , HumanosRESUMO
Adrenal chromaffin cells release neurotransmitters in response to stress and may be involved in conditions such as post-traumatic stress and anxiety disorders. Neurotransmitter release is triggered, in part, by activation of nicotinic acetylcholine receptors (nAChRs). However, despite decades of use as a model system for studying exocytosis, the nAChR subtypes involved have not been pharmacologically identified. Quantitative real-time PCR of rat adrenal medulla revealed an abundance of mRNAs for α3, α7, ß2, and ß4 subunits. Whole-cell patch-clamp electrophysiology of chromaffin cells and subtype-selective ligands were used to probe for nAChRs derived from the mRNAs found in adrenal medulla. A novel conopeptide antagonist, PeIA-5469, was created that is highly selective for α3ß2 over other nAChR subtypes heterologously expressed in Xenopus laevis oocytes. Experiments using PeIA-5469 and the α3ß4-selective α-conotoxin TxID revealed that rat adrenal medulla contain two populations of chromaffin cells that express either α3ß4 nAChRs alone or α3ß4 together with the α3ß2ß4 subtype. Conclusions were derived from observations that acetylcholine-gated currents in some cells were sensitive to inhibition by PeIA-5469 and TxID, while in other cells, currents were sensitive only to TxID. Expression of functional α7 nAChRs was determined using three α7-selective ligands: the agonist PNU282987, the positive allosteric modulator PNU120596, and the antagonist α-conotoxin [V11L,V16D]ArIB. The results of these studies identify for the first time the expression of α3ß2ß4 nAChRs as well as functional α7 nAChRs by rat adrenal chromaffin cells.
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Medula Suprarrenal/metabolismo , Células Cromafins/metabolismo , Antagonistas Nicotínicos/farmacologia , Receptores Nicotínicos/biossíntese , Animais , Células Cultivadas , Conotoxinas/farmacologia , Masculino , Ratos , Ratos Sprague-Dawley , Xenopus laevis , Receptor Nicotínico de Acetilcolina alfa7/antagonistas & inibidores , Receptor Nicotínico de Acetilcolina alfa7/biossínteseRESUMO
Opioid drugs are widely used to treat chronic pain, but their misuse can lead to tolerance, dependence, and addiction and have created a significant public health problem. In addition, food-derived opioid peptides, known as exorphins, like gluten exorphins have been shown to have harmful effects in certain pathologies like celiac disease, for example. Several studies support the involvement of the opioid system in the development of disorders such as autism spectrum syndrome. Moreover, bidirectional communication between the intestine and brain has been shown to be altered in various neurodegenerative diseases including Alzheimer´s and Parkinson´s. The presence of opioid receptors in both the digestive tract and the central nervous system (CNS) suggests that opioid drugs and exorphins may modulate the gut-brain axis. Morphine, for example, has shown a dysbiotic effect on the bacterial microbiota in addition to inducing an increase in intestinal permeability facilitating bacterial translocation. Furthermore, certain components of bacteria can modify the expression of opioid receptors at the central level increasing sensitivity to pain. Strategies based on use of probiotics have resulted in improvements in symptoms of autism and Parkinson´s disease. In this manuscript, we review the role of the opioid system in disorders and CNS pathologies and the involvement of the gut-brain axis.
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Analgésicos Opioides/efeitos adversos , Bactérias/efeitos dos fármacos , Encéfalo/efeitos dos fármacos , Microbioma Gastrointestinal/efeitos dos fármacos , Intestinos/microbiologia , Morfina/efeitos adversos , Peptídeos/efeitos adversos , Receptores Opioides/efeitos dos fármacos , Animais , Bactérias/metabolismo , Encéfalo/metabolismo , Encéfalo/fisiopatologia , Exposição Dietética/efeitos adversos , Disbiose , Humanos , Doenças Neurodegenerativas/metabolismo , Doenças Neurodegenerativas/microbiologia , Doenças Neurodegenerativas/fisiopatologia , Doenças Neurodegenerativas/terapia , Probióticos/uso terapêutico , Receptores Opioides/metabolismo , Transdução de SinaisRESUMO
Bradykinin (BK), a hormone inducing pain and inflammation, is known to inhibit potassium M-currents (IM) and to increase the excitability of the superior cervical ganglion (SCG) neurons by activating the Ca2+-calmodulin pathway. M-current is also reduced by muscarinic agonists through the depletion of membrane phosphatidylinositol 4,5-biphosphate (PIP2). Similarly, the activation of muscarinic receptors inhibits the current through two-pore domain potassium channels (K2P) of the "Tandem of pore-domains in a Weakly Inward rectifying K+ channel (TWIK)-related channels" (TREK) subfamily by reducing PIP2 in mouse SCG neurons (mSCG). The aim of this work was to test and characterize the modulation of TREK channels by bradykinin. We used the perforated-patch technique to investigate riluzole (RIL) activated currents in voltage- and current-clamp experiments. RIL is a drug used in the palliative treatment of amyotrophic lateral sclerosis and, in addition to blocking voltage-dependent sodium channels, it also selectively activates the K2P channels of the TREK subfamily. A cell-attached patch-clamp was also used to investigate TREK-2 single channel currents. We report here that BK reduces spike frequency adaptation (SFA), inhibits the riluzole-activated current (IRIL), which flows mainly through TREK-2 channels, by about 45%, and reduces the open probability of identified single TREK-2 channels in cultured mSCG cells. The effect of BK on IRIL was precluded by the bradykinin receptor (B2R) antagonist HOE-140 (d-Arg-[Hyp3, Thi5, d-Tic7, Oic8]BK) but also by diC8PIP2 which prevents PIP2 depletion when phospholipase C (PLC) is activated. On the contrary, antagonizing inositol triphosphate receptors (IP3R) using 2-aminoethoxydiphenylborane (2-APB) or inhibiting protein kinase C (PKC) with bisindolylmaleimide did not affect the inhibition of IRIL by BK. In conclusion, bradykinin inhibits TREK-2 channels through the activation of B2Rs resulting in PIP2 depletion, much like we have demonstrated for muscarinic agonists. This mechanism implies that TREK channels must be relevant for the capture of information about pain and visceral inflammation.
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Bradicinina/metabolismo , Neurônios/efeitos dos fármacos , Fosfatidilinositol 4,5-Difosfato/metabolismo , Canais de Potássio de Domínios Poros em Tandem/genética , Sistema Nervoso Simpático/efeitos dos fármacos , Potenciais de Ação/efeitos dos fármacos , Animais , Bradicinina/administração & dosagem , Bradicinina/análogos & derivados , Bradicinina/genética , Bradicinina/farmacologia , Células Cultivadas , Humanos , Camundongos , Agonistas Muscarínicos/farmacologia , Neurônios/patologia , Técnicas de Patch-Clamp , Fosfatidilinositol 4,5-Difosfato/genética , Potássio/metabolismo , Canais de Potássio de Domínios Poros em Tandem/metabolismo , Receptores Muscarínicos/genética , Riluzol/farmacologia , Bloqueadores dos Canais de Sódio/farmacologia , Gânglio Cervical Superior/efeitos dos fármacos , Sistema Nervoso Simpático/metabolismo , Fosfolipases Tipo CRESUMO
The ionic mechanisms controlling the resting membrane potential (RMP) in superior cervical ganglion (SCG) neurons have been widely studied and the M-current (IM, KCNQ) is one of the key players. Recently, with the discovery of the presence of functional TREK-2 (TWIK-related K+ channel 2) channels in SCG neurons, another potential main contributor for setting the value of the resting membrane potential has appeared. In the present work, we quantified the contribution of TREK-2 channels to the resting membrane potential at physiological temperature and studied its role in excitability using patch-clamp techniques. In the process we have discovered that TREK-2 channels are sensitive to the classic M-current blockers linopirdine and XE991 (IC50 = 0.310 ± 0.06 µM and 0.044 ± 0.013 µM, respectively). An increase from room temperature (23 °C) to physiological temperature (37 °C) enhanced both IM and TREK-2 currents. Likewise, inhibition of IM by tetraethylammonium (TEA) and TREK-2 current by XE991 depolarized the RMP at room and physiological temperatures. Temperature rise also enhanced adaptation in SCG neurons which was reduced due to TREK-2 and IM inhibition by XE991 application. In summary, TREK-2 and M currents contribute to the resting membrane potential and excitability at room and physiological temperature in the primary culture of mouse SCG neurons.
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Canais de Potássio KCNQ/metabolismo , Potenciais da Membrana , Neurônios/fisiologia , Canais de Potássio de Domínios Poros em Tandem/metabolismo , Sistema Nervoso Simpático/fisiologia , Temperatura , Adaptação Fisiológica/efeitos dos fármacos , Animais , Antracenos/farmacologia , Células HEK293 , Humanos , Indóis/farmacologia , Ativação do Canal Iônico/efeitos dos fármacos , Potenciais da Membrana/efeitos dos fármacos , Camundongos , Neurônios/efeitos dos fármacos , Piridinas/farmacologia , Riluzol/farmacologia , Gânglio Cervical Superior/efeitos dos fármacos , Gânglio Cervical Superior/fisiologia , Tetraetilamônio/farmacologia , Tetra-Hidronaftalenos/farmacologia , Tetrazóis/farmacologiaRESUMO
Controlling body temperature is a matter of life or death for most animals, and in mammals the complex thermoregulatory system is comprised of thermoreceptors, thermosensors, and effectors. The activity of thermoreceptors and thermoeffectors has been studied for many years, yet only recently have we begun to obtain a clear picture of the thermosensors and the molecular mechanisms involved in thermosensory reception. An important step in this direction was the discovery of the thermosensitive transient receptor potential (TRP) cationic channels, some of which are activated by increases in temperature and others by a drop in temperature, potentially converting the cells in which they are expressed into heat and cold receptors. More recently, the TWIK-related potassium (TREK) channels were seen to be strongly activated by increases in temperature. Hence, in this review we want to assess the hypothesis that both these groups of channels can collaborate, possibly along with other channels, to generate the wide range of thermal sensations that the nervous system is capable of handling.
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Canais de Potássio de Domínios Poros em Tandem/metabolismo , Canais de Cátion TRPV/metabolismo , Sensação Térmica , Animais , Humanos , Canais de Potássio de Domínios Poros em Tandem/química , Canais de Potássio de Domínios Poros em Tandem/genética , Canais de Cátion TRPV/químicaRESUMO
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by impaired communication and social interactions, and repetitive behavioural patterns. These patterns are believed to be dysfunctional symptoms in executive processing, which impact other cognitive functions such as attention or cognitive flexibility. In recent years, several studies have shown that certain intestinal bacteria may play a role in shaping cognitive networks encompassing emotional and social domains. A microbiota-gut-brain axis is known to exist, establishing several mechanisms by which microbiota may modulate brain development, function and behaviour, including immune, endocrine and neural pathways. As the aetiology of ASD is largely unknown, some studies have shown that intestinal bacteria may be involved in its pathogenesis. The aim of this review was to focus on the role of the gut-brain axis in ASD and, specifically, on its role in executive functions. First, we summarize the relationship between the gastrointestinal and cognitive symptoms of ASD patients. In addition, we highlight the evidence that supports and emphasizes the involvement of gut microbiota, and the putative underlying mechanisms in this population. Finally, we present evidence from preclinical and clinical studies on the modulation of microbiota and their effects on cognitive symptoms, specifically in relation to executive function. In conclusion, manipulation of microbiota could be a positive intervention to improve ASD symptoms. However, more research evaluating the role of microbiota in the cognitive symptoms ASD is needed.
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Transtorno do Espectro Autista/complicações , Encéfalo/fisiopatologia , Transtornos Cognitivos/etiologia , Função Executiva/fisiologia , Microbioma Gastrointestinal/fisiologia , Trato Gastrointestinal/microbiologia , Animais , Encéfalo/microbiologia , Transtornos Cognitivos/microbiologia , HumanosRESUMO
Varenicline is a nicotinic acetylcholine receptor (nAChR) agonist used to treat nicotine addiction, but a live debate persists concerning its mechanism of action in reducing nicotine consumption. Although initially reported as α4ß2 selective, varenicline was subsequently shown to activate other nAChR subtypes implicated in nicotine addiction including α3ß4. However, it remains unclear whether activation of α3ß4 nAChRs by therapeutically relevant concentrations of varenicline is sufficient to affect the behavior of cells that express this subtype. We used patch-clamp electrophysiology to assess the effects of varenicline on native α3ß4* nAChRs (asterisk denotes the possible presence of other subunits) expressed in human adrenal chromaffin cells and compared its effects to those of nicotine. Varenicline and nicotine activated α3ß4* nAChRs with EC50 values of 1.8 (1.2-2.7) µM and 19.4 (11.1-33.9) µM, respectively. Stimulation of adrenal chromaffin cells with 10 ms pulses of 300 µM acetylcholine (ACh) in current-clamp mode evoked sodium channel-dependent action potentials (APs). Under these conditions, perfusion of 50 or 100 nM varenicline showed very little effect on AP firing compared to control conditions (ACh stimulation alone), but at higher concentrations (250 nM) varenicline increased the number of APs fired up to 436 ± 150%. These results demonstrate that therapeutic concentrations of varenicline are unlikely to alter AP firing in chromaffin cells. In contrast, nicotine showed no effect on AP firing at any of the concentrations tested (50, 100, 250, and 500 nM). However, perfusion of 50 nM nicotine simultaneously with 100 nM varenicline increased AP firing by 290 ± 104% indicating that exposure to varenicline and nicotine concurrently may alter cellular behavior such as excitability and neurotransmitter release.
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Potenciais de Ação/efeitos dos fármacos , Córtex Suprarrenal/efeitos dos fármacos , Células Cromafins/efeitos dos fármacos , Nicotina/administração & dosagem , Agonistas Nicotínicos/administração & dosagem , Vareniclina/administração & dosagem , Potenciais de Ação/fisiologia , Córtex Suprarrenal/citologia , Córtex Suprarrenal/fisiologia , Adulto , Idoso , Animais , Células Cromafins/fisiologia , Relação Dose-Resposta a Droga , Sinergismo Farmacológico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Xenopus laevisRESUMO
As the population ages, cognitive decline becomes more common. Strategies targeting the gut-brain axis using probiotics are emerging to achieve improvements in neuropsychiatric and neurological disorders. However, the beneficial role of probiotics on brain function in healthy older adults remains unclear. Our aim was to evaluate a multi-species probiotic formulation as a therapeutic approach to reduce emotional and cognitive decline associated with aging in healthy adults. A randomized double-blind placebo-controlled crossover trial was conducted. The study involved a 10-week intervention where participants consumed the assigned probiotic product daily, followed by a 4-week washout period before the second condition started. Cognitive function was assessed using the Mini-Mental State Examination (MMSE) and the Psychological Experiments Construction Language Test Battery. At the emotional level, the Beck Depression Inventory (BDI) and the State-Trait Anxiety Inventory (STAI) were used. Thirty-three participants, recruited between July 2020 and April 2022, ingested a multispecies probiotic (Lactobacillus rhamnosus and Bifidobacterium lactis). After the intervention, noticeable enhancements were observed in cognitive function (mean difference 1.90, 95% CI 1.09 to 2.70, p < 0.005), memory (mean difference 4.60, 95% CI 2.91 to 6.29, p < 0.005) by MMSE and digit task, and depressive symptoms (mean difference 4.09, 95% CI 1.70 to 6.48, p < 0.005) by BDI. Furthermore, there were significant improvements observed in planning and problem-solving skills, selective attention, cognitive flexibility, impulsivity, and inhibitory ability. Probiotics administration improved cognitive and emotional function in older adults. Limited research supports this, requiring more scientific evidence for probiotics as an effective therapy for cognitive decline. This study has been prospectively registered at ClinicalTrials.gov (NCT04828421; 2020/July/17).
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Cancer is a global health concern influenced by genetics, environment and lifestyle choices. Recent research shows that a ketogenic diet (KD) might ease cancer symptoms and reduce tumour size. We hypothesised that the KD could result in improvements in cancer-related variables. Therefore, this study aims to perform a systematic review and meta-analysis to assess the KD's efficacy for patients with cancer. The databases PubMed (MEDLINE), Web of Science, CINAHL and Open Grey were utilised for conducting a systematic review and meta-analysis. The analysis was limited to randomised controlled trials with adult participants aged 18 years and above. Levels of glucose, cholesterol, insulin-like growth factor 1, weight and quality of life were evaluated following the KD. After identifying 596 articles in the initial search, eight studies, lasting between 4 and 16 weeks, were included in the systematic review and seven in the meta-analysis. The KD led to decreased glucose levels in patients with cancer but did not show significant improvements in cholesterol, insulin-like growth factor 1, weight or quality of life. Based on the results of this systematic review and meta-analysis, there is insufficient evidence to establish a definitive link between the KD and cancer-related parameters. While some studies suggest potential benefits in terms of some outcomes and tumour size reduction, further research is required to fully comprehend the effects of this diet.
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Glicemia , Dieta Cetogênica , Neoplasias , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Humanos , Neoplasias/dietoterapia , Glicemia/metabolismo , Glicemia/análise , Colesterol/sangue , Fator de Crescimento Insulin-Like I/metabolismo , Peso Corporal , AdultoRESUMO
The intensive cultivation under plastic in southern Spain has made the agricultural model highly productive. Although strict regulations on pesticide usage exist, exposure to pesticides in the environment has been associated with an increased appearance of neurodegenerative diseases including Alzheimer's disease (AD). A cross-sectional study was performed to examine the prevalence and risk of AD related to pesticide exposure in Andalusia (Spain). We utilized the Odds Ratio statistical test to compare the prevalence rate of AD in the exposed and unexposed areas. 40,044 cases were collected from computerized hospital records between 2000 and 2021. Districts with higher pesticide use showed significantly higher prevalence rates and increased risk of developing AD, compared to those with lower pesticide use. These findings provide further evidence supporting an increased risk of AD following environmental exposure to pesticides at the level of the general population.
Assuntos
Doença de Alzheimer , Exposição Ambiental , Praguicidas , Humanos , Espanha/epidemiologia , Estudos Transversais , Doença de Alzheimer/epidemiologia , Doença de Alzheimer/induzido quimicamente , Praguicidas/efeitos adversos , Feminino , Masculino , Exposição Ambiental/efeitos adversos , Exposição Ambiental/estatística & dados numéricos , Idoso , Prevalência , Idoso de 80 Anos ou mais , Pessoa de Meia-IdadeRESUMO
BACKGROUND: Duchenne muscular dystrophy (DMD) is a genetic condition that causes muscle weakness and begins in early childhood. To treat its complications, the rehabilitation program includes physical therapy, mainly on the musculoskeletal and the respiratory complications that appear on the evolution of the disease. This study aims to explore the effects of physical therapy with or without an at-home program on motor function among children with DMD. METHODS: A randomized controlled trial was carried out for one year (one group with at-home and conventional physical therapy and another with conventional physical therapy). Motor function was measured using the Motor Function Measure (MFM) scale, the Vignos and Brooke scales, the Timed-up-and-Go test, and the six-minute walk distance test. RESULTS: Twenty-seven participants with DMD participated in this study. In the at-home and conventional physical therapy group, better motor function at the distal and global level was maintained, per the results of the MFM scale (P < 0.05). The rest of the variables did not achieve statistically significant changes. CONCLUSIONS: Our results suggest that complementing conventional treatment with at-home treatment in which the family is involved maintains better motor function, in participants with DMD.
Assuntos
Distrofia Muscular de Duchenne , Criança , Humanos , Pré-Escolar , Distrofia Muscular de Duchenne/terapia , Equilíbrio Postural , Estudos de Tempo e Movimento , Caminhada/fisiologia , Modalidades de FisioterapiaRESUMO
The agricultural model in southern Spain is highly productive, mainly due to the intensive cultivation under plastic. Despite strict pesticide regulation, human exposure to pesticides in the environment has been connected to an increase in diseases such as celiac disease. Certain pesticides have also been associated to the disruption of the intestinal microbiota, which has been tied to the development of irritable bowel syndrome (IBS). A case-control study was conducted in Andalusia, south Spain, to assess the prevalence and risk of IBS related to pesticide exposure. This research found a high prevalence of IBS in Andalusia between 2000 and 2021 in areas with high pesticide exposure using agronomic criteria. Furthermore, the odds ratio for IBS was significantly higher in the population with high pesticide exposure. This study suggests that pesticides may be involved in IBS, whereas more research is needed to determine the role of pesticides in IBS symptomatology.