Both sides now: evolutionary traits of antigens and B cells in tolerance and activation.

B cells are the cornerstone of our body's defense system, producing precise antibodies and safeguarding immunological memory for future protection against pathogens. While we have a thorough understanding of how naïve B cells differentiate into plasma or memory B cells, the early B cell response to various antigens-whether self or foreign-remains a thrilling and evolving area of study. Advances in imaging have illuminated the molecular intricacies of B cell receptor (BCR) signaling, yet the dynamic nature of B cell activation continues to reveal new insights based on the nature of antigen exposure. This review explores the evolutionary journey of B cells as they adapt to the unique challenges presented by pathogens. We begin by examining the specific traits of antigens that influence their pathogenic potential, then shift our focus to the distinct characteristics of B cells that counteract these threats. From foundational discoveries to the latest cutting-edge research, we investigate how B cells are effectively activated and distinguish between self and non-self antigens, ensuring a balanced immune response that defends against pathogenic diseases but not self-antigens.

Nonrestorative Sleep and Type 2 Diabetes Incidence: The Aichi Workers' Cohort Study.

BACKGROUND: The term "nonrestorative sleep (NRS)" refers to an unrefreshed feeling at wake-up and is a domain of poor sleep quality. Previous research has demonstrated that NRS is linked to a number of diseases and adverse health outcomes, but less is known regarding the link between NRS and diabetes, particularly in Japanese. METHODS: We studied 3,665 middle-aged male participants of the Aichi Workers' Cohort Study who were followed-up from 2002 through 2019. Cox proportional hazards models estimated hazard ratios (HRs) and 95% confidence intervals (CIs) of incident type 2 diabetes mellitus (T2DM) in relation to NRS adjusted for potential confounding variables. RESULTS: During a median follow-up of 14.6 years, 421 type 2 diabetes cases were identified. Participants with NRS had a higher crude incidence rate of T2DM (11.2/1,000 person-years), compared to participants without NRS (9.3/1,000 person-years). In the fully adjusted model, individuals who reported having NRS had a significantly higher risk of developing T2DM (HR1.36; 95% CI, 1.10-1.67). The association was observed only in participants under 50 years old (HR 1.82; 95% CI, 1.36-2.43), not in the older (50 years or older) participants (P for interaction = 0.025). In contrast, stratified analyses by the presence of shift work, obesity, or sleep duration showed similar associations in all the strata. CONCLUSION: NRS was associated with higher risk of T2DM in middle-aged Japanese male workers independent of a variety of lifestyle factors and other sleep problems.

Local-electrostatics-induced oxygen octahedral distortion in perovskite oxides and insight into the structure of Ruddlesden-Popper phases.

As the physical properties of ABX3 perovskite-based oxides strongly depend on the geometry of oxygen octahedra containing transition-metal cations, precise identification of the distortion, tilt, and rotation of the octahedra is an essential step toward understanding the structure-property correlation. Here we discover an important electrostatic origin responsible for remarkable Jahn-Teller-type tetragonal distortion of oxygen octahedra during atomic-level direct observation of two-dimensional [AX] interleaved shear faults in five different perovskite-type materials, SrTiO3, BaCeO3, LaCoO3, LaNiO3, and CsPbBr3. When the [AX] sublayer has a net charge, for example [LaO]+ in LaCoO3 and LaNiO3, substantial tetragonal elongation of oxygen octahedra at the fault plane is observed and this screens the strong repulsion between the consecutive [LaO]+ layers. Moreover, our findings on the distortion induced by local charge are identified to be a general structural feature in lanthanide-based An + 1BnX3n + 1-type Ruddlesden-Popper (RP) oxides with charged [LnO]+ (Ln = La, Pr, Nd, Eu, and Gd) sublayers, among more than 80 RP oxides and halides with high symmetry. The present study thus demonstrates that the local uneven electrostatics is a crucial factor significantly affecting the crystal structure of complex oxides.

Atomic-scale unveiling of multiphase evolution during hydrated Zn-ion insertion in vanadium oxide.

An initial crystalline phase can transform into another phases as cations are electrochemically inserted into its lattice. Precise identification of phase evolution at an atomic level during transformation is thus the very first step to comprehensively understand the cation insertion behavior and subsequently achieve much higher storage capacity in rechargeable cells, although it is sometimes challenging. By intensively using atomic-column-resolved scanning transmission electron microscopy, we directly visualize the simultaneous intercalation of both H2O and Zn during discharge of Zn ions into a V2O5 cathode with an aqueous electrolyte. In particular, when further Zn insertion proceeds, multiple intermediate phases, which are not identified by a macroscopic powder diffraction method, are clearly imaged at an atomic scale, showing structurally topotactic correlation between the phases. The findings in this work suggest that smooth multiphase evolution with a low transition barrier is significantly related to the high capacity of oxide cathodes for aqueous rechargeable cells, where the crystal structure of cathode materials after discharge differs from the initial crystalline state in general.

Validity of the Kihon Checklist for assessing frailty status.

AIM: The Kihon Checklist is extensively used in Japan to identify elderly persons who are at risk of requiring support/care. We aimed to determine whether or not the Kihon Checklist can estimate frailty status defined by the Cardiovascular Health Study criteria. METHODS: This cross-sectional study evaluated the Kihon Checklist and activities of daily living based on self-records maintained with the assistance of nurses in a convenience sample of 164 elderly outpatients who lived without care or support. Body composition was measured using dual energy X-ray absorptiometry. Physical functions, nutritional status, cognitive function and depressive mood were assessed using standardized evaluations. Frailty status was evaluated using the Cardiovascular Health Study frailty criteria. RESULTS: The total Kihon Checklist score closely correlated with validated assessments of physical functions, nutritional state, cognitive function, depressive mood and the number of frailty phenotypes defined by the Cardiovascular Health Study criteria (ρ = 0.655, P < 0.001). The area under the receiver operating characteristics curves for the evaluation of frailty status was 0.81 for prefrailty and 0.92 for frailty. The sensitivity and the specificity were 70.3% and 78.3% for prefrailty, and 89.5% and 80.7% for frailty at total Kihon Checklist scores of 3/4 and 7/8, respectively. CONCLUSION: The Kihon Checklist is a useful tool for frailty screening. Analyzing the results of this self-reporting questionnaire, together with other more high-tech screening modalities, will cost-effectively improve the quality of life for many elderly individuals in a timely manner. Geriatr Gerontol Int 2015; ●●: ●●-●●.

[Palliative care in patients without cancer: Impact of the end-of-life care team].

Palliative care improves the quality of life of patients and their families facing problems associated with life-threatening illnesses by promoting the prevention and relief of suffering. Palliative care in Japan has been developed mainly for cancer patients. At the National Center for Geriatrics and Gerontology, an end-of-life care team (EOLCT) has been developed to promote palliative care for patients without cancer. In the first 6 months of its operation, 109 requests were received by the team, 40% of which were for patients without cancer or related disease, including dementia, frailty due to advanced age, chronic respiratory failure, chronic heart failure, and intractable neurologic diseases. The main purpose of the EOLCT is to alleviate suffering. The relevant activities of the team include the use of opioids, providing family care, and giving support in decision-making (advance care planning) regarding withholding; enforcement; and withdrawal of mechanical ventilators, gastric feeding tubes, and artificial alimentation. The EOLCT is also involved in ongoing discussions of ethical problems. The team is actively engaged in the activities of the Japanese Geriatric Society and contributes to the development of decision-making guidelines for end-of-life by the Ministry of Health, Labour and Welfare. The EOLCT can be helpful in promoting palliative care for patients with diseases other than cancer. The team offers support during times of difficulty and decision-making.

[Usefulness of support from end-of-life care teams in difficult decision-making].

It is unclear how hospitals should support a patient's decision to return home to die. Thus, we retrospectively examined the usefulness of support from an End-Of-Life Care Team in such difficult decision making. The subjects included non-cancer patients and the elderly. Our results suggest that the burden of making difficult decisions decreases with support from End- Of-Life Care Teams.

[Comprehensive geriatric assessment and cancer care-choice of treatment and in-home palliative care executed by using advance care planning].

Choice of treatment and in-home palliative care are important for the cancer care of the elderly. In recent years, comprehensive geriatric assessment (CGA), which has been developed as a multidimensional evaluation method for the elderly, has been attracting attention for cancer care as well. CGA can be a common language for the choice of treatment and in-home palliative care of elderly cancer patients. Also, advance care planning (ACP), is important as a process that supports decision making. In the future, better choices of treatment will become available, and in-home palliative care will be improved by carrying out cancer care using CGA, while continuously carrying out ACP as an organization, realizing a high quality of life (QOL) of the elderly.

[Role of home medical care support system in aged cancer patients' symptom relief and regional alliances].

The aim of this study was to evaluate the role of home medical care support system to relieve the symptom and regional alliances for elderly cancer patients. We investigated clinical parameters to study the features of this system. The home medical care support system is designed for patients who are B75-year-old with decrease in activities of daily living and severe dementia. The support system plays a significant role in patients with impaired oral ingestion, dyspnea, delirium, and a poor general status.

[Medical care support intervention to the patient and family who has chosen a terminal care at home - an influence of satisfactory experience on the culture of terminal care].

The National Center for Geriatrics and Gerontology in Japan implemented a home medical care support system for aged patients in April 2009. In this study, we report a case of terminal care system where a medical care intervention was carried out by a close coordination of visiting nurses and other staffs with a "at-home terminal care" brochure on hand, and we discussed how this system was brought forward satisfactory and how it affected this culture.