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2.
Sleep Med X ; 8: 100124, 2024 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-39252820

RESUMEN

Background: Sleep disturbances, such as insomnia, are common among the elderly population and have been associated with negative health outcomes. Japanese calligraphy is a traditional art practice previously associated with various health benefits, such as stress reduction and improved cognitive function; however, its association with sleep quality has not been fully explored. Methods: This cross-sectional study included 21,207 subjects with basic attributes, health status, depressive symptoms, artistic practices, and sleep habits. Individuals who satisfied the chronic insomnia criteria were categorized into the following subtypes: sleep onset latency (SOL) insomnia, early morning awakening (EMA) insomnia, and wake after sleep offset (WASF) insomnia. The t-test, chi-square test, and logistic regression analysis were used to determine the association between Japanese calligraphy practice and sleep quality. Results: In this study, 17,597 elderly Japanese individuals were included, among whom 13.7 % practiced Japanese calligraphy. Regarding sleep characteristics, 32.0 % had chronic insomnia, 13.1 % had SOL insomnia, 9.1 % had EMA insomnia, and 14.2 % had WASF insomnia. Japanese calligraphy practice was associated with lower rates of chronic insomnia (odds ratio [OR] = 0.85, 95 % confidence interval (CI) = 0.76-0.95), including SOL insomnia (OR = 0.84, 95 % CI = 0.71-0.98), and EMA insomnia (OR = 0.80, 95 % CI = 0.66-0.97) but had no significant association with WASF insomnia. Conclusions: This study suggests that Japanese calligraphy practice is associated with lower odds of insomnia, particularly SOL and EMA insomnia. Calligraphy may be an effective nonpharmacological intervention for insomnia and poor sleep quality among elderly Japanese individuals.

3.
Front Aging Neurosci ; 16: 1401818, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39170899

RESUMEN

Background and objectives: Cognitive reserve (CR) is a property of the brain that allows for better-than-expected cognitive performance relative to the degree of brain change over the course of life. However, neurophysiological markers of CR remain under-investigated. Electroencephalography (EEG) features may function as suitable neurophysiological markers of CR. To assess this, we investigated whether the dorsal attention network (DAN) and ventral attention network (VAN) activities, as measured during resting-state EEG, moderate the relationship between hippocampal volume and episodic memory. Methods: Participants were recruited as part of the National Center for Geriatrics and Gerontology-Study of Geriatric Syndromes. Hippocampal volume was determined using magnetic MRI, and episodic memory was measured using word lists. After testing the effect of hippocampal volume on memory performance using multiple regression analysis, we evaluated the interactions between hippocampal volume and DAN and VAN network activities. We further used the Johnson-Neyman technique to quantify the moderating effects of DAN and VAN network activities on the relationship between hippocampal volume and word list memory, as well as to identify specific ranges of DAN and VAN network activity with significant hippocampal-memory association. Results: A total of 449 participants were included in this study. Our analysis revealed significant moderation of DAN with a slope of ß = -0.00012 (95% CI: -0.00024; -0.00001, p = 0.040), and VAN with a slope of ß = 0.00014 (95% CI: 0.00001; 0.00026, p = 0.031). Further, we found that a larger hippocampal volume was associated with improved memory performance, and that this association became stronger as the DAN activity decreased until a limit of DAN activity of 944.9, after which the hippocampal volume was no longer significantly related to word-list memory performance. For the VAN, we found that a higher hippocampal volume was more strongly associated with better memory performance when VAN activity was higher. However, when VAN activity extended beyond -914.6, the hippocampal volume was no longer significantly associated with word-list memory. Discussion: Our results suggest that attentional networks help to maintain memory performance in the face of age-related structural decline, meeting the criteria for the neural implementation of cognitive reserve.

4.
Biomedicines ; 12(7)2024 Jul 08.
Artículo en Inglés | MEDLINE | ID: mdl-39062082

RESUMEN

Patients with pancreatic neuroendocrine tumors (pNETs) have limited access to effective targeted agents and invariably succumb to progressive disease. MUC1-C is a druggable oncogenic protein linked to driving pan-cancers. There is no known involvement of MUC1-C in pNET progression. The present work was performed to determine if MUC1-C represents a potential target for advancing pNET treatment. We demonstrate that the MUC1 gene is upregulated in primary pNETs that progress with metastatic disease. In pNET cells, MUC1-C drives E2F- and MYC-signaling pathways necessary for survival. Targeting MUC1-C genetically and pharmacologically also inhibits self-renewal capacity and tumorigenicity. Studies of primary pNET tissues further demonstrate that MUC1-C expression is associated with (i) an advanced NET grade and pathological stage, (ii) metastatic disease, and (iii) decreased disease-free survival. These findings demonstrate that MUC1-C is necessary for pNET progression and is a novel target for treating these rare cancers with anti-MUC1-C agents under clinical development.

5.
Geriatr Nurs ; 58: 232-237, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38838405

RESUMEN

Few studies have reported an association between diversity in productive activities and life satisfaction; hence, this cross-sectional study conducted in Japan aimed to clarify this association. We assessed the life satisfaction of 4,498 Japanese community-dwelling older adults engaged in productive activities (e.g., paid work, volunteering, taking care of children, and supporting others) using the Life Satisfaction Scale. We took the sum of the number of engaging productive activities as the diversity in productive activities score. A dose-response relationship was observed for each additional productive activity on life satisfaction. Participants who engaged in one, two, three, or four productive activities were more likely to have higher life satisfaction than those who did not engage; the odds ratios (95 % confidence intervals) were 1.19 (1.02-1.39), 1.19 (1.00-1.42), 1.71 (1.37-2.13), and 2.27 (1.58-3.27), respectively. Diversity in productive activities may enhance higher life satisfaction likelihood among Japanese community-dwelling older adults.


Asunto(s)
Vida Independiente , Satisfacción Personal , Humanos , Estudios Transversales , Japón , Masculino , Femenino , Anciano , Encuestas y Cuestionarios , Actividades Cotidianas , Anciano de 80 o más Años , Pueblos del Este de Asia
6.
Artículo en Inglés | MEDLINE | ID: mdl-38692838

RESUMEN

Understanding the processes that drive phenotypic diversification and underpin speciation is key to elucidating how biodiversity has evolved. Although these processes have been studied across a wide array of clades, adaptive radiations (ARs), which are systems with multiple closely related species and broad phenotypic diversity, have been particularly fruitful for teasing apart the factors that drive and constrain diversification. As such, ARs have become popular candidate study systems for determining the extent to which ecological features, including aspects of organisms and the environment, and inter- and intraspecific interactions, led to evolutionary diversification. Despite substantial past empirical and theoretical work, understanding mechanistically how ARs evolve remains a major challenge. Here, we highlight a number of understudied components of the environment and of lineages themselves, which may help further our understanding of speciation and AR. We also outline some substantial remaining challenges to achieving a detailed understanding of adaptation, speciation, and the role of ecology in these processes. These major challenges include identifying factors that have a causative impact in promoting or constraining ARs, gaining a more holistic understanding of features of organisms and their environment that interact resulting in adaptation and speciation, and understanding whether the role of these organismal and environmental features varies throughout the radiation process. We conclude by providing perspectives on how future investigations into the AR process can overcome these challenges, allowing us to glean mechanistic insights into adaptation and speciation.

7.
J Pers Med ; 14(5)2024 Apr 29.
Artículo en Inglés | MEDLINE | ID: mdl-38793061

RESUMEN

The purpose of this study was to conduct a cross-sectional analysis of the association between hearing aid use and cognitive decline in community-dwelling older adults with hearing impairment, stratified by cardiovascular risk level. This cross-sectional study covers 1857 hearing-impaired individuals selected among 10,674 community-dwelling older adults (≥65 years of age) in Japan. We investigate the association between hearing aid use and cognitive decline stratified by cardiovascular risk level, by assessing self-reported hearing impairment and hearing aid use, absolute cardiovascular risk, cognitive function, and potential confounding factors. The association between hearing impairment severity and increased cardiovascular risk, and the benefit of hearing aid use in preventing cognitive decline, were examined in a binomial logistic regression analysis, with the presence of cognitive decline as the objective variable. In the low cardiovascular risk group, hearing aid users had a lower odds ratio for decline in executive function than non-users (odds ratio = 0.61, 95% confidence interval: 0.39-0.98). However, there was no significant association between hearing aid use and cognitive decline in the high cardiovascular risk group (p > 0.05). Among older adults with hearing impairment, hearing aid use was associated with the maintenance of executive function in individuals of low cardiovascular risk.

8.
Cells ; 13(8)2024 Apr 12.
Artículo en Inglés | MEDLINE | ID: mdl-38667286

RESUMEN

Ischemic stroke is a major cerebrovascular disease with high morbidity and mortality rates; however, effective treatments for ischemic stroke-related neurological dysfunction have yet to be developed. In this study, we generated neural progenitor cells from human leukocyte antigen major loci gene-homozygous-induced pluripotent stem cells (hiPSC-NPCs) and evaluated their therapeutic effects against ischemic stroke. hiPSC-NPCs were intracerebrally transplanted into rat ischemic brains produced by transient middle cerebral artery occlusion at either the subacute or acute stage, and their in vivo survival, differentiation, and efficacy for functional improvement in neurological dysfunction were evaluated. hiPSC-NPCs were histologically identified in host brain tissues and showed neuronal differentiation into vGLUT-positive glutamatergic neurons, extended neurites into both the ipsilateral infarct and contralateral healthy hemispheres, and synaptic structures formed 12 weeks after both acute and subacute stage transplantation. They also improved neurological function when transplanted at the subacute stage with γ-secretase inhibitor pretreatment. However, their effects were modest and not significant and showed a possible risk of cells remaining in their undifferentiated and immature status in acute-stage transplantation. These results suggest that hiPSC-NPCs show cell replacement effects in ischemic stroke-damaged neural tissues, but their efficacy is insufficient for neurological functional improvement after acute or subacute transplantation. Further optimization of cell preparation methods and the timing of transplantation is required to balance the efficacy and safety of hiPSC-NPC transplantation.


Asunto(s)
Diferenciación Celular , Células Madre Pluripotentes Inducidas , Accidente Cerebrovascular Isquémico , Células-Madre Neurales , Sinapsis , Células Madre Pluripotentes Inducidas/metabolismo , Células Madre Pluripotentes Inducidas/citología , Humanos , Animales , Células-Madre Neurales/metabolismo , Células-Madre Neurales/trasplante , Células-Madre Neurales/citología , Accidente Cerebrovascular Isquémico/patología , Accidente Cerebrovascular Isquémico/terapia , Ratas , Sinapsis/metabolismo , Masculino , Neuritas/metabolismo , Encéfalo/patología , Isquemia Encefálica/terapia , Isquemia Encefálica/patología , Neuronas/metabolismo , Neuronas/patología , Ratas Sprague-Dawley , Accidente Cerebrovascular/terapia , Accidente Cerebrovascular/patología
9.
ACS Omega ; 9(14): 16035-16043, 2024 Apr 09.
Artículo en Inglés | MEDLINE | ID: mdl-38617678

RESUMEN

The development of a low-cost and user-friendly sensor using microorganisms to monitor the presence of As(III) on earth has garnered significant attention. In conventional research on microbial As(III) sensors, the focus has been on transcription factor ArsR, which plays a role in As(III) metabolism. However, we recently discovered that LuxR, a quorum-sensing control factor in Vibrio fischeri that contains multiple cysteine residues, acted as an As(III) sensor despite having no role in As(III) metabolism. This finding suggested that any protein could be an As(III) sensor if cysteine residues were incorporated. In this study, we aimed to confer As(III) responsiveness to BetI, a transcriptional repressor of the TetR family involved in osmotic regulation of the choline response, unrelated to As(III) metabolism. Based on the BetI structure constructed using molecular dynamics calculations, we generated a series of mutants in which each of the three amino acids not critical for function was substituted with cysteine. Subsequent examination of their response to As(III) revealed that the cysteine-substituted mutant, incorporating all three substitutions, demonstrated As(III) responsiveness. This was evidenced by the fluorescence intensity of the downstream reporter superfolder green fluorescent protein expression regulated by the operator region. Intriguingly, the BetI cysteine mutant maintained its binding responsiveness to the natural ligand choline. We successfully engineered an OR logic gate capable of responding to two orthogonal ligands using a single protein.

10.
Prev Med ; 183: 107976, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38688347

RESUMEN

OBJECTIVES: This longitudinal observational cohort study aimed to clarify the relationship between perceived value (PV) to adopt new behaviors and incident disability in community-dwelling older adults. METHOD: Participants were 5073 community-dwelling older adults aged ≥65 years in Japan (Mage = 74.0 ± 5.6 years; female = 55.1%). The mean follow-up time was 34.5 months. Baseline data were collected during health checkups in a prospective cohort study. Measurements included engagement in physical activity (PA), cognitive activity (CA), and social activity (SA), PV, health and physical conditions, and demographic characteristics. PV was assessed by asking whether participants thought it was valuable to adopt new behaviors related to PA, CA, and SA. Participants were classified as having higher/lower PV, PA, CA, and SA. Cox proportional hazard models were used to analyze the association between PV and incident disability. PV was examined both as an independent variable and in combination as follows: higher PV and higher PA/CA/SA (high/high); lower PV and higher PA/CA/SA (low/high); higher PV and lower PA/CA/SA (high/low); and lower PV and lower PA/CA/SA (low/low). RESULTS: Higher PV was significantly associated with a lower hazard ratio (HR) for incident disability. The low/high, high/low, and low/low significantly increased the HR compared to high/high in the analyses of PV & PA and CA. The analysis of PV & SA showed that only low/low increased the HR compared to high/high. CONCLUSION: Having both higher PV and higher activity engagement may contribute to preventing disability development. Both support for activities and value education in older adults may be needed.


Asunto(s)
Personas con Discapacidad , Ejercicio Físico , Vida Independiente , Humanos , Femenino , Masculino , Anciano , Japón , Estudios Longitudinales , Personas con Discapacidad/estadística & datos numéricos , Personas con Discapacidad/psicología , Estudios Prospectivos , Anciano de 80 o más Años , Conductas Relacionadas con la Salud , Incidencia , Pueblos del Este de Asia
11.
J Am Med Dir Assoc ; 25(4): 690-696.e1, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38431265

RESUMEN

OBJECTIVES: This study aimed to examine the impact of negative and positive life events on the development of social frailty. DESIGN: Population-based longitudinal study. SETTING AND PARTICIPANTS: This study was set in the Japanese community cohort and included 2174 adults aged ≥65 years without social frailty at baseline. METHODS: We assessed the experiences of 6 negative and positive life events (increase in economic difficulties, illness or injury of spouse, death of family or friends, marriage of children or grandchildren, birth of grandchildren or great-grandchildren, and making new friends) in the 15 months after baseline. We followed the social frailty status of the participants and identified the development of social frailty 48 months after the baseline. Social frailty was operationally defined as having 2 or more of Makizako's 5 items (going out less frequently, rarely visiting friends, not feeling helpful to friends or family, living alone, and not talking to someone daily). RESULTS: Among 2174 participants without social frailty at baseline, 161 (7.4%) developed social frailty after 48 months. Multivariate logistic regression models on each life event and development of social frailty showed that illness or injury of spouse was significantly associated with a higher risk of subsequent social frailty [adjusted odds ratio (OR), 1.74; 95% CI, 1.10-2.74] and making new friends was significantly associated with lower risk of subsequent social frailty (adjusted OR, 0.38; 95% CI, 0.27-0.54). No significant ORs of social frailty were found for other life events. CONCLUSIONS AND IMPLICATIONS: Life events in later life have both positive and negative impacts on the development of social frailty, depending on the nature of the event. To prevent social frailty, it may be important to monitor negative life events and promote positive life events in later life.


Asunto(s)
Fragilidad , Anciano , Niño , Humanos , Anciano Frágil , Vida Independiente , Estudios Longitudinales
12.
Sci Rep ; 14(1): 4569, 2024 02 25.
Artículo en Inglés | MEDLINE | ID: mdl-38403722

RESUMEN

Early preventive measures against depression have become important with unprecedented global aging. Increase in one's perceived value (PV) may correspond to better mental health outcomes. This cross-sectional observation study aimed to clarify whether the PV of adopting new behaviors is associated with depressive symptoms. The participants were 5266 community-dwelling older adults aged ≥ 65 years. We developed a questionnaire to measure the PV of adopting new behaviors, specifically activities beneficial for preventing depressive symptoms (physical, cognitive, and social activities) in older adults. The questionnaire asked whether adopting the ten selected behaviors was valuable. The scores were added, and the total score ranged from - 20 to 20. The odds ratios (OR) of depressive symptoms were calculated using binomial logistic regression according to the PV score quartiles. Depressive symptoms were reported by 595 (11.3%) participants. After adjusting for potential confounders, higher quartiles of PV scores were significantly associated with lower prevalence of depressive symptoms: vs Q1; Q2 OR 0.76 (95% confidence interval: 0.59-0.97); Q3 0.67 (0.51-0.87); Q4 0.54 (0.40-0.73) (P for trend < .001). Having a higher PV of adopting new behaviors may prevent depressive symptoms among older adults. Healthcare professionals need to pay attention to poor value orientation among older adults.


Asunto(s)
Depresión , Vida Independiente , Anciano , Humanos , Estudios Transversales , Depresión/epidemiología , Depresión/prevención & control , Depresión/diagnóstico , Conducta Social , Encuestas y Cuestionarios
13.
J Am Med Dir Assoc ; 25(3): 488-493.e3, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38246592

RESUMEN

OBJECTIVES: Regular physical activity throughout life is generally recommended to prevent dementia; however, there is little evidence regarding the association between lifetime physical activity and mild cognitive impairment (MCI), which often precedes dementia. This study aimed to examine the association of lifetime physical activity and their transitions with late-life MCI. DESIGN: A population-based case-control study. SETTING AND PARTICIPANTS: A total of 2968 Japanese community-dwelling older adults aged ≥70 years without dementia. METHODS: We evaluated the participants' early-, mid-, and late-life physical activity habits and categorized their transitions across life stages. Cognitive functions in late life were assessed for memory, attention, executive function, and processing speed; functional impairment in one or more cognitive domains was defined as MCI. RESULTS: Regular physical activity in early life was not significantly associated with late-life MCI [odds ratio (OR), 0.80; 95% CI, 0.63-1.02], although those in mid-life (OR, 0.64; 95% CI, 0.51-0.81) and late-life (OR, 0.74; 95% CI, 0.59-0.91) were associated with lower odds of late-life MCI. Compared with nonexercisers, participants who acquired new habits of physical activity during mid- or late-life (OR, 0.71; 95% CI, 0.55-0.91) and those who maintained physical activity throughout their life span (OR, 0.61; 95% CI, 0.42-0.87) had lower odds of late-life MCI; those who stopped regular activity during mid- or late-life did not (OR, 0.79; 95% CI, 0.58-1.06). CONCLUSIONS AND IMPLICATIONS: While physical activity throughout the life span is associated with the lowest odds of MCI, starting regular physical activity, even later in life, confers a benefit and should be encouraged as a "lifelong approach" to MCI risk reduction.


Asunto(s)
Disfunción Cognitiva , Demencia , Humanos , Anciano , Vida Independiente , Estudios de Casos y Controles , Ejercicio Físico , Demencia/psicología
15.
Vasc Endovascular Surg ; 58(5): 505-511, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38258617

RESUMEN

INTRODUCTION: We sought to examine midterm results and remodeling effect of false-lumen occlusion treatment using AFX VELA in case of chronic dissection repair. MATERIAL AND METHODS: From June 2019 to May 2022, we performed false lumen occlusion treatment using a modified Candy-Plug technique with AFX VELA on 8 chronic aortic dissection patients with a patent false lumen. We collected operative data, short-term clinical outcomes, mid-term clinical outcomes and imaging test results. We conducted follow-up examinations at postoperative, 6-month and 1-, 2- and 3-year intervals, including contrast-enhanced computed tomography to evaluate the diameter, false lumen thrombosis and any events. RESULTS: The average time from the symptom onset to the thoracic endovascular repair was 81.5 (35-155) months. The aorta showed aneurysmal dilation with an average maximum short-axis diameter of 58.9 (41-91) mm. Two cases needed emergency surgery due to rupture and impending rupture. There were no postoperative deaths. Complete thrombosis within the false lumen was achieved in 6 cases (75%), but 2 cases had incomplete thrombosis, requiring additional treatment. The mean maximum diameter showed a significant decrease at 6 months, 1 year and 2 years postoperatively compared to preoperative measurements (P < .05). CONCLUSION: We showed the results of false lumen occlusion treatment using the AFX VELA cuff. We observed favorable clinical outcomes and remodeling effects. While the long-term durability and efficacy of this technique in aortic remodeling will need to be monitored with further observation, the use of this cuff is considered a reliable approach to false lumen occlusion treatment.


Asunto(s)
Aneurisma de la Aorta Torácica , Disección Aórtica , Implantación de Prótesis Vascular , Prótesis Vascular , Procedimientos Endovasculares , Humanos , Disección Aórtica/diagnóstico por imagen , Disección Aórtica/cirugía , Disección Aórtica/fisiopatología , Masculino , Persona de Mediana Edad , Resultado del Tratamiento , Enfermedad Crónica , Anciano , Femenino , Factores de Tiempo , Implantación de Prótesis Vascular/instrumentación , Implantación de Prótesis Vascular/efectos adversos , Procedimientos Endovasculares/instrumentación , Procedimientos Endovasculares/efectos adversos , Estudios Retrospectivos , Aneurisma de la Aorta Torácica/diagnóstico por imagen , Aneurisma de la Aorta Torácica/cirugía , Aneurisma de la Aorta Torácica/fisiopatología , Diseño de Prótesis , Stents , Remodelación Vascular
16.
Alzheimers Res Ther ; 15(1): 217, 2023 12 15.
Artículo en Inglés | MEDLINE | ID: mdl-38102703

RESUMEN

BACKGROUND: Neurodegeneration and structural changes in the brain due to amyloid deposition have been observed even in individuals with mild cognitive impairment (MCI). EEG measurement is considered an effective tool because it is noninvasive, has few restrictions on the measurement environment, and is simple and easy to use. In this study, we investigated the neurophysiological characteristics of community-dwelling older adults with MCI using EEG. METHODS: Demographic characteristics, cognitive function, physical function, resting-state MRI and electroencephalogram (rs-EEG), event-related potentials (ERPs) during Simon tasks, and task proportion of correct responses and reaction times (RTs) were obtained from 402 healthy controls (HC) and 47 MCI participants. We introduced exact low-resolution brain electromagnetic tomography-independent component analysis (eLORETA-ICA) to assess the rs-EEG network in community-dwelling older adults with MCI. RESULTS: A lower proportion of correct responses to the Simon task and slower RTs were observed in the MCI group (p < 0.01). Despite no difference in brain volume between the HC and MCI groups, significant decreases in dorsal attention network (DAN) activity (p < 0.05) and N2 amplitude of ERP (p < 0.001) were observed in the MCI group. Moreover, DAN activity demonstrated a correlation with education (Rs = 0.32, p = 0.027), global cognitive function (Rs = 0.32, p = 0.030), and processing speed (Rs = 0.37, p = 0.010) in the MCI group. The discrimination accuracy for MCI with the addition of the eLORETA-ICA network ranged from 0.7817 to 0.7929, and the area under the curve ranged from 0.8492 to 0.8495. CONCLUSIONS: The eLORETA-ICA approach of rs-EEG using noninvasive and relatively inexpensive EEG demonstrates specific changes in elders with MCI. It may provide a simple and valid assessment method with few restrictions on the measurement environment and may be useful for early detection of MCI in community-dwelling older adults.


Asunto(s)
Disfunción Cognitiva , Vida Independiente , Humanos , Anciano , Disfunción Cognitiva/diagnóstico por imagen , Cognición , Electroencefalografía/métodos , Encéfalo/diagnóstico por imagen
17.
PNAS Nexus ; 2(11): pgad329, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-38024402

RESUMEN

Plants are often exposed not only to short-term (S-) but also to long-term (L-)heat stress over several consecutive days. A few Arabidopsis mutants defective in L-heat tolerance have been identified, but the molecular mechanisms are less understood for this tolerance than for S-heat stress tolerance. To elucidate the mechanisms of the former, we used a forward genetic screen for sensitive to long-term heat (sloh) mutants and isolated sloh3 and sloh63. The mutants were hypersensitive to L- but not to S-heat stress, and sloh63 was also hypersensitive to salt stress. We identified the causal genes, SLOH3 and SLOH63, both of which encoded splicing-related components of the MOS4-associated complex (MAC). This complex is widely conserved in eukaryotes and has been suggested to interact with spliceosomes. Both genes were induced by L-heat stress in a time-dependent manner, and some abnormal splicing events were observed in both mutants under L-heat stress. In addition, endoplasmic reticulum (ER) stress and subsequent unfolded protein response occurred in both mutants under L-heat stress and were especially prominent in sloh63, suggesting that enhanced ER stress is due to the salt hypersensitivity of sloh63. Splicing inhibitor pladienolide B led to concentration-dependent disturbance of splicing, decreased L-heat tolerance, and enhanced ER stress. These findings suggest that maintenance of precise mRNA splicing under L-heat stress by the MAC is important for L-heat tolerance and suppressing ER stress in Arabidopsis.

18.
Nat Commun ; 14(1): 7395, 2023 Nov 21.
Artículo en Inglés | MEDLINE | ID: mdl-37989736

RESUMEN

During the COVID-19 pandemic, human behavior change as a result of nonpharmaceutical interventions such as isolation may have induced directional selection for viral evolution. By combining previously published empirical clinical data analysis and multi-level mathematical modeling, we find that the SARS-CoV-2 variants selected for as the virus evolved from the pre-Alpha to the Delta variant had earlier and higher peak in viral load dynamics but a shorter duration of infection. Selection for increased transmissibility shapes the viral load dynamics, and the isolation measure is likely to be a driver of these evolutionary transitions. In addition, we show that a decreased incubation period and an increased proportion of asymptomatic infection are also positively selected for as SARS-CoV-2 mutated to adapt to human behavior (i.e., Omicron variants). The quantitative information and predictions we present here can guide future responses in the potential arms race between pandemic interventions and viral evolution.


Asunto(s)
COVID-19 , SARS-CoV-2 , Humanos , SARS-CoV-2/genética , COVID-19/epidemiología , Pandemias , Carga Viral
19.
Front Psychiatry ; 14: 1150973, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37840799

RESUMEN

Intergenerational transmission is a crucial aspect of human development. Although prior studies have demonstrated the continuity of psychopathology and maladaptive upbringing environments between parents and offspring, the underlying neurobiological mechanisms remain unclear. We have begun a novel neuroimaging research project, the Transmit Radiant Individuality to Offspring (TRIO) study, which focuses on biological parent-offspring trios. The participants of the TRIO study were Japanese parent-offspring trios consisting of offspring aged 10-40 and their biological mother and father. Structural and functional brain images of all participants were acquired using magnetic resonance imaging (MRI). Saliva samples were collected for DNA analysis. We obtained psychosocial information, such as intelligence, mental health problems, personality traits, and experiences during the developmental period from each parent and offspring in the same manner as much as possible. By April 2023, we completed data acquisition from 174 trios consisting of fathers, mothers, and offspring. The target sample size was 310 trios. However, we plan to conduct genetic and epigenetic analyses, and the sample size is expected to be expanded further while developing this project into a multi-site collaborative study in the future. The TRIO study can challenge the elucidation of the mechanism of intergenerational transmission effects on human development by collecting diverse information from parents and offspring at the molecular, neural, and behavioral levels. Our study provides interdisciplinary insights into how individuals' lives are involved in the construction of the lives of their descendants in the subsequent generation.

20.
Cureus ; 15(9): e45205, 2023 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-37842345

RESUMEN

Anomalous aortic origin of the coronary artery (AAOCA) is a rare congenital cardiac abnormality. Although AAOCA can cause angina, syncope, palpitations, and sudden cardiac death, most patients remain asymptomatic. A 60-year-old woman experienced occasional chest discomfort. A coronary computed tomography (CT) showed that the right coronary artery (RCA) originated from the left sinus of Valsalva, indicating AAORCA. Exercise myocardial scintigraphy revealed ischemia in the inferior wall. Cardiac catheterization showed stenosis in the ostium of the RCA. Therefore, direct reimplantation of the RCA into the right sinus was performed under cardiopulmonary bypass. The patient recovered uneventfully, postoperatively. Postoperative coronary CT showed no evidence of bending or stenosis in the RCA. Moreover, exercise scintigraphy showed no ischemic changes. The patient was discharged on postoperative day 18 after the resolution of chest discomfort and remained healthy for the following one year. AAORCA is a rare congenital abnormality that could lead to sudden cardiac death. Appropriate imaging studies and surgery should be performed in symptomatic patients with AAORCA who have inter-arterial paths between the ascending aorta and pulmonary artery with right coronary ostial stenosis. Reimplantation of the RCA directly into the right coronary sinus with adequate mobilization of the RCA is a simple procedure that can return the anatomic and biophysiologic status of AAORCA patients to normal and resolve most morphologic abnormalities.

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