Chromosomal-level genome of velvet bean (Mucuna pruriens) provides resources for L-DOPA synthetic research and development.

Mucuna pruriens, commonly called velvet bean, is the main natural source of levodopa (L-DOPA), which has been marketed as a psychoactive drug for the clinical management of Parkinson's disease and dopamine-responsive dystonia. Although velvet bean is a very important plant species for food and pharmaceutical manufacturing, the lack of genetic and genomic information about this species severely hinders further molecular research thereon and biotechnological development. Here, we reported the first velvet bean genome, with a size of 500.49 Mb and 11 chromosomes encoding 28,010 proteins. Genomic comparison among legume species indicated that velvet bean speciated ∼29 Ma from soybean clade, without specific genome duplication. Importantly, we identified 21 polyphenol oxidase coding genes that catalyse l-tyrosine to L-DOPA in velvet bean, and two subfamilies showing tandem expansion on Chr3 and Chr7 after speciation. Interestingly, disease-resistant and anti-pathogen gene families were found contracted in velvet bean, which might be related to the expansion of polyphenol oxidase. Our study generated a high-quality genomic reference for velvet bean, an economically important agricultural and medicinal plant, and the newly reported L-DOPA biosynthetic genes could provide indispensable information for the biotechnological and sustainable development of an environment-friendly L-DOPA biosynthesis processing method.

Age-Related Disparities in Stroke Knowledge Among Community Older Adults.

Background: This study aimed to investigate the disparities in stroke knowledge between older adults and the oldest old. Methods: Family physicians conducted a cross-sectional survey through face-to-face interviews with the older and oldest old adults of two suburban communities in the Minhang district, Shanghai between October 1, 2020, and November 30, 2020. All participants were classified as oldest old (age ≥80 years) and older adults (age 60-79 years). Between-group differences in stroke knowledge were investigated by multivariate logistic regression analysis. Results: Overall, 466 older adults including 101 (21.67%) oldest old persons were qualified. Older adults were more familiar with the risk factors and symptoms of stroke than the oldest old. By multivariable logistic regression analysis, older adults were more familiar with the following risk factors: smoking [odds ratio (OR) 0.32, 95% confidence interval (CI) 0.16-0.61], alcohol abuse (OR 0.45, 95% CI 0.23-0.87), dyslipidemia (OR 0.51, 95% CI 0.31-0.85), and obesity (OR 0.30, 95% CI 0.17-0.53) than the oldest old. Regarding stroke symptoms, older adults were more aware regarding vision alteration (OR 0.42, 95% CI 0.25-0.69) and face-drop (OR 0.57, 95% CI 0.35-0.95) than the oldest old. The oldest old were less aware of acute stroke therapy (OR 0.11, 95% CI 0.02-0.48) and calling the emergency medical service (OR 0.30, 95% CI 0.12-0.70) than older adults. Finally, the older adults used television (OR 0.53, 95% CI 0.28-1.0), WeChat (OR 0.21, 95% CI 0.05-0.89), and the community bulletin board (OR 0.43, 95% CI 0.23-0.80) as knowledge sources more than the oldest old. Conclusion: The older adults and the oldest old had significantly high disparities in stroke knowledge. Given the aging population across China, the life expectancy is expected to be longer in future decades. These differences should be addressed in stroke educational campaigns targeting the oldest old.

Disparities in the Outcomes Following Ischemic Stroke Between the Floating Population and Indigenous Population of Shanghai.

Background and Purposes: Through this study, we hope to gain more insights into the differences in outcome following an ischemic stroke between the floating population and the indigenous population of Shanghai. Method: In this retrospective cohort study, we analyzed patients with first-ever acute ischemic stroke who were admitted to a comprehensive stroke center in the Minhang district, Shanghai, from January 1, 2019, to December 31, 2020. All patient's demographic data and medical histories were prospectively collected and they were followed up for at least 3 months. The Indigenous population of Shanghai was defined as patients with an identification number starting with 310. All others were treated as floating population. The primary outcome was defined as an unfavorable prognosis at 3 months, with a modified Rankin Scale (mRS) score above 1. Secondary outcomes included the use of emergency medical service (EMS), 3 h arrival rate, and endovascular therapy in eligible patients. Logistic regression analysis was applied to investigate the differences. Results: Finally, 698 patients with first-ever acute ischemic stroke were included (with mean age of 65.32 years, 74.6% men). Of these, 302 patients belonged to the floating population group. Indigenous populations with ischemic stroke were older than the floating population (68.26 years vs. 61.47 years, P < 0.001). The floating population was more likely to achieve favorable outcomes at 3 months compared with the indigenous population in multivariable logistic regression analysis [Odds ratio (OR): 0.49, 95% CI: 0.32-0.75, P = 0.001]. The use of EMS, 3 h arrival rate, and the application of endovascular therapy were comparable between the floating population and indigenous population (OR: 0.89, 95% CI: 0.62-1.27, P = 0.519; OR: 0.78, 95% CI: 0.56-1.09, P = 0.14; and OR: 0.82, 95% CI: 0.54-1.26, P = 0.365, respectively). Conclusion: Compared with the indigenous population, the floating population with the first-ever ischemic stroke was more likely to have a favorable outcome at 3 months.

Changing the strategy and culture of stroke awareness education in China: implementing Stroke 1-2-0.

This project implemented the Stroke 1-2-0 stroke awareness programme across China and investigated its impact over a 2-year period. We initiated the Stroke 1-2-0 educational campaign and Stroke 1-2-0 special task forces (STF) across the nation. Massive media coverage, community-based educational sessions with videos and other related materials and induction of Stroke 1-2-0 STF were the major means of promotion. We delivered a survey at the end of 2016 and 2018 to evaluate the impact of our effort. A total of 3066 participants responded to the first survey in 2016, and 15 207 participants responded in 2018 across China. The acceptance rate for Stroke 1-2-0 versus FAST (an English-language stroke awareness tool) was 50.2% versus 19.1% in 2016, and changed significantly to 82.2% versus 8.0% in 2018 (p<0.001). Stroke 1-2-0 was well accepted by all ages and by people with different academic qualifications. Only 6.5% of survey respondents were aware that there was a therapeutic window for thrombolytic therapy in 2016, but this awareness increased significantly to 32.8% in 2018. Only 12.6% of people in 2016 indicated that they would send patients with stroke to the nearest hospital capable of performing thrombolytic therapy, but there was a nearly threefold increase (52.5%) in this number by 2018. More than 1000 major hospitals joined the Stroke 1-2-0 STF, and more than 20 000 'stroke warriors' have joined our stroke awareness improvement effort so far. Stroke 1-2-0 stroke awareness programme is well-implemented and accepted, and is generating profound improvement in stroke awareness in China.

Construction of the Leaf Senescence Database and Functional Assessment of Senescence-Associated Genes.

Leaf senescence is the last phase of plant development and a highly coordinated process regulated by a large number of senescence-associated genes (SAGs). By broad literature survey, we constructed a leaf senescence database (LSD) in 2011 and updated it to Version 2.0 in 2014 ( http://www.eplantsenescence.org/ and http://psd.cbi.pku.edu.cn/ ) which contains a total of 5357 genes and 324 mutants from 44 species. These SAGs were retrieved based on genetic, genomic, proteomic, physiological, or other experimental evidence and were classified into different categories according to their functions in leaf senescence or morphological phenotype of mutants. To provide comprehensive information for SAGs, we made extensive annotation by both manual and computational approaches. In addition, we predicted putative orthologues of the SAGs in other species. LSD has a user-friendly interface to allow users to make text queries or BLAST searches and to download SAGs sequences for local analysis. Functional analyses of putative SAGs reveal that WRKY75, AZF2, NAC16, and WRKY26 are positive regulators of leaf senescence, while MKP2 and CTR1 perform negative regulation to leaf senescence. This database has been served as a valuable resource for basic research on the function of SAGs and evolution of plant leaf senescence, as well as for the exploration of genetic traits in agronomically important plants.