Asymmetric Carbene-Alkyne Metathesis-Mediated Cascade: Synthesis of Benzoxazine Polychiral Polyheterocycles and Discovery of a Novel Pain Blocker.

This study introduces a novel approach for synthesizing Benzoxazine-centered Polychiral Polyheterocycles (BPCPHCs) via an innovative asymmetric carbene-alkyne metathesis-triggered cascade. Overcoming challenges associated with intricate stereochemistry and multiple chiral centers, the catalytic asymmetric Carbene Alkyne Metathesis-mediated Cascade (CAMC) is employed using dirhodium catalyst/Brønsted acid co-catalysis, ensuring precise stereo control as validated by X-ray crystallography. Systematic substrate scope evaluation establishes exceptional diastereo- and enantioselectivities, creating a unique library of BPCPHCs. Pharmacological exploration identifies twelve BPCPHCs as potent Nav ion channel blockers, notably compound 8 g. In vivo studies demonstrate that intrathecal injection of 8 g effectively reverses mechanical hyperalgesia associated with chemotherapy-induced peripheral neuropathy (CIPN), suggesting a promising therapeutic avenue. Electrophysiological investigations unveil the inhibitory effects of 8 g on Nav1.7 currents. Molecular docking, dynamics simulations and surface plasmon resonance (SPR) assay provide insights into the stable complex formation and favorable binding free energy of 8 g with C5aR1. This research represents a significant advancement in asymmetric CAMC for BPCPHCs and unveils BPCPHC 8 g as a promising, uniquely acting pain blocker, establishing a C5aR1-Nav1.7 connection in the context of CIPN.

Transcutaneous vagus nerve stimulation: a new strategy for Alzheimer's disease intervention through the brain-gut-microbiota axis?

Transcutaneous vagus nerve stimulation (tVNS) is an emerging non-invasive technique designed to stimulate branches of the vagus nerve distributed over the body surface. Studies suggest a correlation between the brain-gut-microbiota (BGM) axis and the pathogenesis of Alzheimer's disease (AD). The BGM axis represents a complex bidirectional communication system, with the vagus nerve being a crucial component. Therefore, non-invasive electrical stimulation of the vagus nerve might have the potential to modify-most of the time probably in a non-physiological way-the signal transmission within the BGM axis, potentially influencing the progression or symptoms of AD. This review explores the interaction between percutaneous vagus nerve stimulation and the BGM axis, emphasizing its potential effects on AD. It examines various aspects, such as specific brain regions, gut microbiota composition, maintenance of intestinal environmental homeostasis, inflammatory responses, brain plasticity, and hypothalamic-pituitary-adrenal (HPA) axis regulation. The review suggests that tVNS could serve as an effective strategy to modulate the BGM axis and potentially intervene in the progression or treatment of Alzheimer's disease in the future.

Effect of hospital elder life program on the incidence of delirium: A systematic review and meta-analysis of clinical trials.

OBJECTIVE: This meta-analysis aims to investigate the effect of the Hospital Elder Life Program (HELP) on the incidence of delirium, delirium scores, length of hospital stay, and incidence of falls. METHODS: Four databases (PubMed, Embase, Cochrane Library, and Web of Science) were searched from inception until January 18, 2024. The search specifically targeted randomized controlled trials (RCTs). Two independent researchers conducted literature screening, quality assessment, and data extraction. The meta-analysis was performed using Review Manager 5.4.1 and Stata 15.1 software. RESULTS: The final analysis included a total of 9 RCTs with 2583 patients. The findings from the meta-analysis indicated that HELP was found to considerably reduce the incidence of delirium and the length of hospital stay when compared to the control group. Nevertheless, no statistically significant differences were observed between the two groups in terms of delirium scores and fall rates. CONCLUSION: In this meta-analysis, HELP can effectively reduce the incidence of delirium and lead to a shorter hospital stay.

Effect of non-invasive neuromodulation techniques on vascular cognitive impairment: A Bayesian network meta-analysis protocol.

BACKGROUND: VCI is a severe public health problem facing the world today. In addition to pharmacological treatment, non-invasive neuromodulation techniques have also been effective. At this stage, non-invasive neuromodulation techniques combined with pharmacological treatment are the mainstay of clinical treatment, and clinical trials are continuing to be conducted, which is becoming the direction of treatment for VCI. Therefore, we outline this systematic review and network meta-analysis protocol to evaluate and rank clinical data in future studies which can develop optimal protocols for the clinical treatment of VCI with non-invasive neuromodulation techniques in combination with drugs. METHODS: The network meta-analysis will search eight databases, including PubMed, Embase, Cochrane Library, Web of Science, China Knowledge Infrastructure Library (CNKI), China Biology Medicine disc (CBM)), Wanfang Data Knowledge Service Platform and Vipshop Journal Service Platform (VIP), for a period of from the establishment of the library to January 30 2022. The quality of the studies will be evaluated using the Cochrane Review's Handbook 5.1 and the PEDro scale to assess the evidence and quality of the included randomised controlled trials. Risk of bias assessment and heterogeneity tests will be performed using the Review Manager 5.4 program, and Bayesian network meta-analysis will be performed using the Stata 16.0 and WinBUGS 1.4.3 program. RESULTS: The results of the network meta-analysis will be published in a peer-reviewed journal. CONCLUSIONS: Our study is expected to provide high quality evidence-based medical evidence for the treatment of VCI by clinicians. TRIAL REGISTRATION: PROSPERO: CRD42022308580.

Immunological studies on acupuncture and moxibustion treatment of rheumatoid arthritis: A review.

From the 4 perspectives of T lymphocytes, various cytokines, adenosine and "neuro-endocrine-immune" network, the researches related to the immune mechanism of acupuncture and moxibustion in the treatment of rheumatoid arthritis (RA) in recent years were summarized, and different acupuncture and moxibustion treatments were analyzed. The method has a regulatory effect on the mechanism of RA, in order to provide a reference and basis for acupuncture research on the immune mechanism of RA, and promote the further development of research in this field.

Deep Learning-Aided Modulation Recognition for Non-Orthogonal Signals.

Automatic Modulation Recognition (AMR) can obtain the modulation mode of the received signal for subsequent processing without the assistance of the transmitter. Although the existing AMR methods have been mature for the orthogonal signals, these methods face challenges when deployed in non-orthogonal transmission systems due to the superimposed signals. In this paper, we aim to develop efficient AMR methods for both downlink and uplink non-orthogonal transmission signals using deep learning-based data-driven classification methodology. Specifically, for downlink non-orthogonal signals, we propose a Bi-directional Long Short-Term Memory (BiLSTM)-based AMR method that exploits long-term data dependence to automatically learn irregular signal constellation shapes. Transfer learning is further incorporated to improve recognition accuracy and robustness under varying transmission conditions. For uplink non-orthogonal signals, the combinatorial number of classification types explodes exponentially with the number of signal layers, which becomes the major obstacle to AMR. We develop a spatio-temporal fusion network based on the attention mechanism to efficiently extract spatio-temporal features, and network details are optimized according to the superposition characteristics of non-orthogonal signals. Experiments show that the proposed deep learning-based methods outperform their conventional counterparts in both downlink and uplink non-orthogonal systems. In a typical uplink scenario with three non-orthogonal signal layers, the recognition accuracy can approach 96.6% in the Gaussian channel, which is 19% higher than the vanilla Convolution Neural Network.

[Acupoint selection rules of acupuncture and moxibustion for post-stroke epilepsy based on data mining technology].

OBJECTIVE: To analyze the acupoint selection rules of acupuncture and moxibustion for post-stroke epilepsy by data mining technology. METHODS: The literature regarding acupuncture and moxibustion for post-stroke epilepsy included in CNKI, VIP, Wanfang, SinoMed and PubMed databases from the establishment of the database to August 1st 2022 was retrieved. Microsoft Excel 2019 software was used to establish a database to conduct the descriptive analysis of acupoints; SPSS Modeler 18.0 Apriori algorithm was used to conduct association rule analysis; high-frequency acupoint co-occurrence network diagrams were drawn by Cytoscape3.9.0 software; SPSS Statistics 25.0 software was used to perform hierarchical cluster analysis on high-frequency acupoints and a tree diagram was drawn. RESULTS: Totally 39 articles were included, and 63 prescriptions of acupuncture and moxibustion were extracted, involving 56 acupoints, with a total frequency of 516 times; the top three acupoints with the highest frequency of use were Baihui (GV 20), Fenglong (ST 40) and Neiguan (PC 6); the selected meridians were mainly the governor vessel, the hand and foot yangming meridians; the selection of acupoints were mostly in the head, neck and lower limbs; in terms of acupoint compatibility, Hegu (LI 4)-Shuigou (GV 26) and Neiguan (PC 6) had the highest confidence degree; The top 20 high-frequency acupoints could be divided into 4 effective clusters. CONCLUSION: Modern acupuncture and moxibustion treatment for post-stroke epilepsy attaches great importance to the use of yang meridians and meridians with enrich qi and blood; the core prescription is Shuigou (GV 26)-Neiguan (PC 6)-Hegu (LI 4)-Baihui (GV 20). In addition, the combination of distant and near acupoints is highly valued to improve clinical efficacy.

Relationship between sportive capacities and athletic potential in the individual with chronic diseases / Relação entre capacidades esportivas e potencial atlético no indivíduo portador de doenças crônicas / Relación entre las capacidades deportivas y el potencial atlético en el individuo con enfermedades crónicas

ABSTRACT Introduction Success in sports depends on the athlete's potential, including the presence of chronic diseases that can negatively affect a sports career. The issue studied is complex, and its solution depends on a combination of factors that act as basal components. The relevance of the research topic mentioned here is determined by the need to study the relationship between these two factors in the context of their mutual influence on an individual's sports career development prospects. Objective This scientific study aims to establish a relationship between sports skills and athletic potential in an individual with chronic diseases. Methods The main approach of this study was a combination of systemic analysis of the relationship between various aspects of an individual's talent with the development of his sports career, a theoretical understanding of the relationship of this factor, and the influence of chronic diseases on sport activity. Results The main results obtained in this scientific study should be considered the determination of the quality of an athlete's achievements on his natural talent and the influence of chronic diseases. Conclusion The prospects for future scientific research in this direction are determined by a real need for the search for and practical application of methods to determine the dependence of sporting achievements on factors included in the theme of this scientific work. The applied value of this scientific study lies in the possibility of the practical application of its results to form such methods for future approaches. Evidence level II; Therapeutic studies - outcomes research.

RESUMO Introdução O sucesso no esporte depende do potencial do atleta, incluindo da presença de doenças crônicas que podem afetar negativamente uma carreira esportiva. A questão estudada é complexa e sua solução depende de uma combinação de fatores que atuam como componentes basais. A relevância do tema de pesquisa mencionado neste caso é determinada pela necessidade de estudar a relação entre estes dois fatores no contexto de sua influência mútua sobre as perspectivas de desenvolvimento da carreira esportiva de um indivíduo. Objetivo O objetivo deste estudo científico é estabelecer uma relação entre as capacidades esportivas e o potencial atlético em um indivíduo portador de doenças crônicas. Métodos A abordagem principal deste estudo foi uma combinação de análise sistêmica da relação entre vários aspectos do talento de um indivíduo com o desenvolvimento de sua carreira esportiva, uma compreensão teórica da relação deste fator e da influência de doenças crônicas na atividade esportiva. Resultados Os principais resultados obtidos no decorrer deste estudo científico devem ser considerados segundo a determinação da dependência da qualidade das realizações de um atleta em relação a seu talento natural e a influência das doenças crônicas. Conclusão As perspectivas de futuras pesquisas científicas nesta direção são determinadas por uma real necessidade de busca e aplicação prática de métodos para determinar a dependência das conquistas esportivas de fatores incluídos no tema deste trabalho científico. O valor aplicado deste estudo científico encontra-se na possibilidade de aplicação prática de seus resultados, com o objetivo de formar tais métodos para futuras abordagens. Evidência nível II; Estudos terapêuticos - pesquisa de resultados.

RESUMEN Introducción El éxito en el deporte depende del potencial del atleta, incluyendo la presencia de enfermedades crónicas que pueden afectar negativamente a la carrera deportiva. La cuestión estudiada es compleja y su solución depende de una combinación de factores que actúan como componentes basales. La pertinencia del tema de investigación mencionado en este caso viene determinada por la necesidad de estudiar la relación entre estos dos factores en el contexto de su influencia mutua en las perspectivas de desarrollo de la carrera deportiva de un individuo. Objetivo El objetivo de este estudio científico es establecer una relación entre las habilidades deportivas y el potencial atlético en un individuo con enfermedades crónicas. Métodos El enfoque principal de este estudio fue una combinación de análisis sistémico de la relación entre varios aspectos del talento de un individuo con el desarrollo de su carrera deportiva, una comprensión teórica de la relación de este factor y la influencia de las enfermedades crónicas en la actividad deportiva. Resultados Los principales resultados obtenidos en el curso de este estudio científico deben considerarse según la determinación de la dependencia de la calidad de los logros de un atleta de su talento natural y la influencia de las enfermedades crónicas. Conclusión Las perspectivas de futuras investigaciones científicas en esta dirección están determinadas por una necesidad real de búsqueda y aplicación práctica de métodos para determinar la dependencia de los logros deportivos de los factores incluidos en el tema de este trabajo científico. El valor aplicado de este estudio científico reside en la posibilidad de aplicación práctica de sus resultados, con el objetivo de formar dichos métodos para futuros planteamientos. Nivel de evidencia II; Estudios terapéuticos - investigación de resultados.

Rh2(Ph3COO)3(OAc)/Chiral Phosphoric Acid Cocatalyzed N-Alkyl Imines-Involved Multicomponent Reactions Yielding N-(Anthrancen-9-ylmethyl) Isoserines as Drug Intermediates.

N-(Anthrancen-9-ylmethyl) isoserines are useful drug intermediates but short for efficient synthesis. We herein report the synthesis of N-(anthrancen-9-ylmethyl) isoserines via a Rh2(Ph3COO)3(OAc) and chiral phosphoric acid (CPA) synergistically catalyzed multicomponent reaction (MCR) of N-alkyl imines, alcohols, and diazoesters. The method representing the first example of N-alkyl imines-involved MCR is featured by high atom-economy, high diastereo- and enantioselectivities, and broad substrate scope. DFT calculations on the mechanism of the MCR reveals that the hydrophobic interactions and π-π stackings between N-(anthrancen-9-ylmethyl) imines and Rh2(Ph3COO)3(OAc)/CPA cocatalyst is essential to the reactivity and stereocontrol. The synthetic applications of the MCR products include the semisynthesis of paclitaxel, its alkyne-tagged derivative, and ß-lactam as an anticancer agent overcoming paclitaxel-resistance. We expect this work to shed light on the development of new N-alkyl imines-involved reactions and on the synthesis of drugs with isoserines as intermediates.

Discovery of Novel Benzo[4,5]imidazo[1,2-a]pyrazin-1-amine-3-amide-one Derivatives as Anticancer Human A2A Adenosine Receptor Antagonists.

The blockade of A2A adenosine receptor (A2AAR) activates immunostimulatory response through regulating signaling in tumor microenvironment. Thus, A2AAR has been proposed as a promising target for cancer immunotherapy. In this work, we designed a new series of benzo[4,5]imidazo[1,2-a]pyrazin-1-amine derivatives bearing an amide substitution at 3-position to obtain potent antitumor antagonist in vivo. The structure-activity relationship studies were performed by molecular modeling and radioactive assay. The in vitro anticancer activities were evaluated by 3',5'-cyclic adenosine monophosphate (cAMP) functional and T cell activation assay. The most potent compound 12o·2HCl showed much higher affinity toward A2AAR (Ki = 0.08 nM) and exhibited more significant in vitro immunostimulatory anticancer activity than clinical antagonist AZD4635. More importantly, 12o·2HCl significantly inhibited the growth of triple-negative breast cancer by reversing immunosuppressive tumor microenvironment in the xenograft mouse model without severe toxicity at the testing dose. These results make 12o·2HCl a promising immunotherapy anticancer drug candidate.

Radical Esterification of Unactivated Alkenes Using Formate as Carbonyl Source.

In recent years, methyl formate has received considerable attention as an ideal and green C1 building block to synthesize carboxylic esters. However, examples of a one-step route to esters with one-carbon elongation using methyl formate as a source of methoxycarbonyl radical are still rare. Herein, we present peroxide-induced radical carbonylation of N-(2-methylallyl)benzamides with methyl formate as the precursor of methoxycarbonyl radical and RuCl3 as catalyst, affording a series of biologically valuable 4-[(methoxycarbonyl)methyl]-3,4-dihydroisoquinolinones with good tolerance and insensitivity to moisture in one pot under simple and mild conditions.

Fluctuations in waist circumference increase diabetes risk: a 4-year cohort study in 61,587 older adults.

PURPOSE: To evaluate the effect of fluctuations in waist circumference (WC), weight, and body mass index (BMI) on the incidence of diabetes in older adults. PATIENTS AND METHODS: A prospective cohort of 61,587 older adults (age, 60-96 years) who did not have diabetes at study initiation was examined. Data on weight, BMI, and WC were collected, and participants were followed up until 31 December 2018. The main end point was new-onset diabetes. A Cox regression model was used to estimate the risk of diabetes (hazard ratios [HRs] and confidence intervals [CI]) in these participants. RESULTS: During a mean follow-up of 3.6 years, being overweight (HR [95% CI] 1.87 [1.62-2.17]), obesity (1.41 [1.26-1.59]), abdominal obesity (1.42 [1.28-1.58]), and obesity plus abdominal obesity at baseline (1.93 [1.66-2.25]) increased the risk of diabetes onset. Compared with older adults who "maintained normal WC", those who "remained abdominally obese" (HR = 1.66), "became abdominally obese" (HR = 1.58), or "achieved normal WC" (HR = 1.36) were at a higher risk of diabetes onset, as well as those with an increase in WC > 3 cm or > 5% compared with the baseline level. Weight gain or loss > 6 kg or weight gain > 5%, increase or decrease in BMI > 2 kg/m2, or an increase in BMI > 10% were associated with a higher diabetes risk. The diabetes risk was reduced by 19% in overweight older adults who exercised daily. CONCLUSION: For older adults, WC, BMI, and healthy weight maintenance reduce the diabetes risk. The findings may provide evidence for developing guidelines of proper weight and WC control for older adults.

Associations of sarcopenia and its defining components with cognitive function in community-dwelling oldest old.

BACKGROUND: This study aimed to investigate the associations of sarcopenia and its defining components with cognitive function in community-dwelling oldest old (over 80 years old) in China. METHODS: Sarcopenia was diagnosed by the 2019 Asian Working Group for Sarcopenia (AWGS) criteria. Cognitive function was evaluated by the Montreal Cognitive Assessment (MoCA). Logistic and linear regression models were used to explore the associations of sarcopenia and its defining components with risk of mild cognitive impairment (MCI), and performance on multiple cognitive domains among 428 adults aged 80 years and older. RESULTS: The overall prevalence of sarcopenia was 35.5%, with 40.34% for men and 32.14% for women. The prevalence of MCI was higher among sarcopenic oldest old than non-sarcopenic oldest old (28.95% vs. 17.39%, p = 0.005). Multivariate logistic regression analyses showed that sarcopenia [odds ratio (OR) = 1.86, 95% confidence interval (CI): 1.04-3.33], low handgrip strength (HS) [OR = 2.33, 95% CI: 1.40-3.87] and slow gait speed (GS) [OR = 2.31, 95% CI: 1.13-4.72] were significantly and independently associated with risk of MCI. Multivariate linear regression analyses showed that low HS was associated with worse performance in global cognitive function, visuospatial and executive function, naming and delayed recall. CONCLUSIONS: Sarcopenia, low HS and low GS was significantly associated with MCI in community-dwelling oldest old. The associations between sarcopenia and its defining components with different cognitive subdomains could be further explored in the future.

Validation of perceived physical fatigability using the simplified-Chinese version of the Pittsburgh Fatigability Scale.

BACKGROUND: The Pittsburgh Fatigability Scale (PFS) was developed to capture fatigue and demand in a single tool, filling a gap that no validated questionnaire existed to measure perceived fatigability. Since fatigability is a more sensitive measure of a person's susceptibility to fatigue, we validated the simplified-Chinese version of the PFS among Chinese community-dwelling older adults. METHODS: This cross-sectional study was conducted in an urban community in Beijing between November 2018 and July 2019. The PFS was translated into simplified-Chinese by the translation, retro-translation method. Internal consistency of the Physical subscale of the PFS was evaluated by Cronbach's alpha. Convergent validity and discriminant validity were evaluated against physical performance measures (i.e., Short Physical Performance Battery & Timed Up and Go Test) and daily living performance (i.e., Barthel Index & Instrumental activity of daily living). RESULTS: Our study included 457 participants, including 182 men (39.8%) and 275 women (60.2%). The age range of the included participants was 61-96 years (mean = 84.8 years, SD = 5.8 years). The simplified-Chinese version of PFS Physical scores showed strong internal consistency (Cronbach's alpha = 0.81). Higher PFS Physical scores were associated with worse physical performance, and daily living performance (|correlation coefficient| range: 0.36-0.56, p < .001). Age- and sex-adjusted PFS Physical scores had moderate to good overall discrimination for correctly classifying people by their physical performance and daily living performance (AUCs range 0.70-0.87, p < .001). CONCLUSIONS: The PFS simplified-Chinese version is a valid instrument to assess perceived physical fatigability in Chinese-speaking older adults with good convergent validity. Thus, the PFS, with low cost and greater feasibility, is a desired tool to measure fatigability in large population studies.

Systemic Identification and Functional Characterization of Common in Fungal Extracellular Membrane Proteins in Lasiodiplodia theobromae.

Plant pathogenic fungi deploy secreted proteins into apoplastic space or intracellular lumen to promote successful infections during plant-pathogen interactions. In the present study, fourteen CFEM domain-containing proteins were systemically identified in Lasiodiplodia theobromae and eight of them were functionally characterized. All eight proteins were confirmed to be secreted into extracellular space by a yeast signal peptide trapping system. The transcriptional levels of most CFEM genes, except for LtCFEM2 and LtCFEM6, were significantly elevated during infection. In addition, almost all LtCFEM genes, apart from LtCFEM2, LtCFEM3, and LtCFEM6, were transcriptionally up-regulated at 35°C in contrast to that at 25°C and 30°C. As two elicitors, LtCFEM1 induced local yellowish phenotype and LtCFEM4 triggered cell death in Nicotiana benthamiana leaves. Furthermore, these proteins displayed distinct subcellular localizations when expressed transiently in N. benthamiana. Moreover, two genes, LtCFEM7 and LtCFEM8, were found to be spliced alternatively by RT-PCR and sequencing. Therefore, our data suggest that LtCFEM proteins play important roles in multiple aspects, including pathogenicity and plant immune response, which will enhance our understanding of the sophisticated pathogenic mechanisms of plant opportunistic pathogen L. theobromae.

The Diabetes Risk and Determinants of Transition from Metabolically Healthy to Unhealthy Phenotypes in 49,702 Older Adults: 4-Year Cohort Study.

OBJECTIVE: This study aimed to assess whether metabolically healthy obesity (MHO) increases the risk of diabetes and to explore how the occurrence of metabolic disorders affects the risk of diabetes and which factors determine metabolic health. METHODS: This study examined 49,702 older people without diabetes via the Binhai Health Screening Program in Tianjin. RESULTS: Compared with individuals with metabolic health and normal weight, the risk of diabetes was increased in older adults with MHO (hazard ratio [HR]: 1.786, 95% CI: 1.407-2.279) but was not significantly increased when metabolic health was characterized by the absence of metabolic abnormalities. The older adults who were initially affected by MHO and then converted to having an unhealthy phenotype had a higher diabetes risk than older individuals with stable and healthy normal weight (HR: 3.727, 95% CI: 2.721-5.105). Waist circumference was an independent predictor of the transition from a metabolically healthy status to an unhealthy status in all BMI categories (odds ratio: 1.059, 95% CI: 1.026-1.032). CONCLUSIONS: The MHO phenotype was associated with an increased incidence of diabetes in older adults. The presence of metabolic disorders in the group with MHO was associated with an increased diabetes risk and was predicted by the waist circumference at baseline.

Geochemical behaviors of antimony in mining-affected water environment (Southwest China).

Antimony (Sb) is a harmful element, and Sb pollution is one of the typical environmental issues in China, meaning that understanding of the geochemical behaviors of Sb is the key to control the fate of environmental Sb pollution. Sb tends to migrate in soluble form in the water-sediment system, but the fate of dissolved Sb is poorly known. Duliujiang river basin, located in southwest China, provided us with a natural aqueous environment to study the transport of Sb because of its unique geological and geographical characteristics. Physicochemical properties (pH, EC, Eh, DO, Flux), trace elements (Sb, As, Sr) and main ions (Ca2+, Mg2+, SO42-) concentrations in mining-impacted waters were measured in order to determine their distribution and migration potential. There are three types of water samples; they are main stream waters (pH of 7.33-8.43), tributary waters (pH of 6.85-9.12) and adit waters with pH values ranging from 7.57 to 9.76, respectively. Results showed that adit waters contained elevated concentrations of Sb reaching up to 13350 µg L-1 from the abandoned Sb mines, and mine wastes contained up to 8792 mg kg-1 Sb from the historical mine dumps are the important sources of Sb pollution in the Duliujiang river basin. Dissolved Sb had strong migration ability in streams, while its attenuation mainly depended on the dilution of tributary water with large flow rate. In the exit section of the Duliujiang river basin, which had only 10 µg L-1 of average Sb concentration. The simple deionized water extraction was designed to investigate the ability of Sb likely to dissolve from the mine wastes. The results indicated that a greater solubility of Sb in alkaline (pH of 7.11-8.16) than in acid (pH of 3.03-4.45) mine wastes, suggesting that mine wastes contained high Sb concentrations, could release Sb into solution in the natural river waters. Furthermore, the fate of Sb pollution depends on the comprehensive treatment of abandoned adit waters and mine wastes in the upper reaches of the drainage basin.

Validation of the Chinese version of the Mini Sarcopenia Risk Assessment questionnaire in community-dwelling older adults.

A new sarcopenia screening tool named Mini Sarcopenia Risk Assessment (MSRA) has recently been developed, which showed a reasonable sensitivity and specificity.We cross-culturally adapted and validated the Chinese version of the MSRA in a population of community-dwelling older adults.We conducted a cross-sectional study in a community in Chengdu, China. Older adults aged 60 years or older were included. A Chinese translation of the MSRA was created. The Chinese version of the MSRA included 2 questionnaires named C-MSRA-7 (containing 7 items) and C-MSRA-5 (containing 5 items). For C-MSRA-7 and C-MSRA-5, total scores of ≤ 30 and 45, respectively, indicate that the subject has sarcopenia. Using 4 common diagnostic criteria of sarcopenia (the European Working Group on Sarcopenia in Older People, Asia Working Group for Sarcopenia, International Working Group on Sarcopenia, and Foundation for the National Institutes of Health criteria) as the "gold standard"; the sensitivity and specificity of the C-MSRA-7 and C-MSRA-5 were examined. We applied the receiver operating characteristic curve to compare the overall accuracy of the C-MSRA-7 and C-MSRA-5 for screening sarcopenia.We recruited 384 participants (mean age: 71.5 ± 5.8 years). Using different criteria as the "gold standard," both C-MSRA-7 and C-MSRA-5 have acceptable sensitivity (ranging from 78.0% [95% confidence interval [CI]: 66.3-87.7] to 86.9% [95% CI: 75.87-94.2] for C-MSRA-7 and from 80.2% [95% CI: 70.8-87.6] to 90.2% [95% CI: 79.8-96.3] for C-MSRA-5) for screening sarcopenia. However, compared with the C-MSRA-7, the C-MSRA-5 is simpler and has better specificity (ranging from 55.9% to 70.6% for C-MSRA-5; and 38.3% to 41.0% for C-MSRA-7) and overall diagnostic accuracy.The MSRA scale was successfully adapted to the Chinese language and validated in Chinese community-dwelling older adults. Compared with C-MSRA-7, C-MSRA-5 is the better tool for screening sarcopenia.

[Home-based Rehabilitation of Stroke Patients].

OBJECTIVE: To assess the physical,psychological and social functioning of stroke patients with home-based rehabilitation. METHODS: Convenient sampling strategy was adopted to select 234 stroke patients discharged from a tertiary hospital rehabilitation center. The patients were assessed using Barthel index (BI),instrumental activities of daily living (IADL) scale,modified rivermead mobility index (mRMI),self-perceived burden scale (SPBS),self-rating depression scale,and Zarit caregiver burden interview (ZBI) during their outpatient visits,household visits,or telephone interviews. RESULTS: The patients had an average BI score of 61.77±22.83,61.11% had mild dependence on daily life. Their IADL score was low at an average of 7.25±6.26. They had 28.90±10.22 in MRMI score and 29.26±7.07 in SPB score. More than 90% had a feeling of self-burden. The caregiver burden score reached 43.97±12.28. Male patients and those with cerebral infarction had better functioning than female patients and those with cerebral hemorrhage. Better physical functioning was demonstrated in those who were younger than 60 yr.,experienced more than one year home-based rehabilitation,were cared by relatives,and had a female caregiver. But such differences were not significant in SPBS and ZBI scores. CONCLUSION: Home-based rehabilitation of stroke has failed to achieve anticipated results. The outcomes vary across those with different age,gender,and type of stroke.