ANS

ANS
  • 文章类型: Journal Article
    茶,全球消费最广泛的饮料之一,在其潜在的风味和与健康相关的化合物中表现出显著的基因组多样性。在这项研究中,我们介绍了一个由11个基因组组成的茶基因组的构建和分析,重点研究了三个新测序的基因组,包括紫叶assamica品种“子娟”,对温度敏感的中华品种“Anjibaicha”和野生登录号“L618”,其组合物表现出优异的质量分数,因为它们从最新的测序技术中获利。我们的分析包括对整个茶基因组的转座子补体的详细调查,揭示所研究基因组中转座子分布的共享模式,并通过长读技术提高转座子分辨率,如长终端重复(LTR)装配指数分析所示。此外,我们的研究包括以基因为中心的pangenome探索,通过我们的研究探索儿茶素途径的基因组景观,提供有关拷贝数改变和以基因为中心的变异的见解,尤其是花青素合成酶。我们通过使用相同的管道在结构和功能上注释所有可用的基因组,构建了以基因为中心的pangenome,这既增加了基因完整性,又允许高功能注释率。这种改进和一致注释的基因集将允许茶基因组之间的更好比较。我们使用这种改进的pangenome来捕获核心和可有可无的基因库,阐明茶树中存在的功能多样性。这种pangenome资源可能作为一个有价值的资源,用于理解特征的基本遗传基础,如风味,应力耐受性,和抗病性,对茶叶育种计划有影响。
    Tea, one of the most widely consumed beverages globally, exhibits remarkable genomic diversity in its underlying flavour and health-related compounds. In this study, we present the construction and analysis of a tea pangenome comprising a total of 11 genomes, with a focus on three newly sequenced genomes comprising the purple-leaved assamica cultivar \"Zijuan\", the temperature-sensitive sinensis cultivar \"Anjibaicha\" and the wild accession \"L618\" whose assemblies exhibited excellent quality scores as they profited from latest sequencing technologies. Our analysis incorporates a detailed investigation of transposon complement across the tea pangenome, revealing shared patterns of transposon distribution among the studied genomes and improved transposon resolution with long read technologies, as shown by long terminal repeat (LTR) Assembly Index analysis. Furthermore, our study encompasses a gene-centric exploration of the pangenome, exploring the genomic landscape of the catechin pathway with our study, providing insights on copy number alterations and gene-centric variants, especially for Anthocyanidin synthases. We constructed a gene-centric pangenome by structurally and functionally annotating all available genomes using an identical pipeline, which both increased gene completeness and allowed for a high functional annotation rate. This improved and consistently annotated gene set will allow for a better comparison between tea genomes. We used this improved pangenome to capture the core and dispensable gene repertoire, elucidating the functional diversity present within the tea species. This pangenome resource might serve as a valuable resource for understanding the fundamental genetic basis of traits such as flavour, stress tolerance, and disease resistance, with implications for tea breeding programmes.
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  • 文章类型: Journal Article
    心血管疾病是全球主要的死亡原因。核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)炎性体被广泛认为是特定心血管疾病进展的关键因素,比如心肌梗塞,心力衰竭.最近的研究强调了自主神经系统(ANS)功能障碍与心脏炎症之间的紧密联系。已经证实交感神经系统激活和迷走神经刺激(VNS)在NLRP3炎性体通路调节中起关键作用,从而有助于改善心脏损伤和改善心脏疾病的预后。本文综述了NLRP3炎性体与心血管疾病之间的关系。阐明ANS内交感神经和迷走神经对NLRP3炎性体的调节功能。此外,它探讨了VNS靶向的NLRP3炎性体的潜在治疗效用。这篇综述为进一步探索VNS在NLRP3炎症小体调控中的潜在机制提供了有价值的参考。
    Cardiovascular disease stands as a leading global cause of mortality. Nucleotide-binding Oligomerization Domain-like Receptor Protein 3 (NLRP3) inflammasome is widely acknowledged as pivotal factor in specific cardiovascular disease progression, such as myocardial infarction, heart failure. Recent investigations underscore a close interconnection between autonomic nervous system (ANS) dysfunction and cardiac inflammation. It has been substantiated that sympathetic nervous system activation and vagus nerve stimulation (VNS) assumes critical roles withinNLRP3 inflammasome pathway regulation, thereby contributing to the amelioration of cardiac injury and enhancement of prognosis in heart diseases. This article reviews the nexus between NLRP3 inflammasome and cardiovascular disorders, elucidating the modulatory functions of the sympathetic and vagus nerves within the ANS with regard to NLRP3 inflammasome. Furthermore, it delves into the potential therapeutic utility of NLRP3 inflammasome to be targeted by VNS. This review serves as a valuable reference for further exploration into the potential mechanisms underlying VNS in the modulation of NLRP3 inflammasome.
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  • 文章类型: Journal Article
    Eriobotrya是一种常绿果树,原产于中国西南部及邻近国家。该属中已知有26种以上的枇杷,而E.japonica是唯一从春末到夏初驯化生产新鲜水果的物种。栽培枇杷的果实通常是橙色的,与野生E.henryi(EH)果实的红色相反。然而,枇杷进化过程中果实色素形成的机制尚未阐明。为了理解这些,本研究进行了靶向类胡萝卜素和花色苷代谢组学以及转录组学分析。结果表明,β-胡萝卜素,紫黄质棕榈酸酯和红黄质月桂酸酯,总共占有色类胡萝卜素的60%以上,是橙色“解放钟”(JFZ)果实果皮中的主要类胡萝卜素。JFZ中类胡萝卜素含量约为EH的10倍,和PSY的表达水平,JFZ的ZDS和ZEP在成熟阶段是EH的10.69至23.26倍。花青素-3-O-半乳糖苷和天花苷-3-O-半乳糖苷是富含EH果皮的主要花青素。相反,两者在JFZ几乎都检测不到,和F3H的转录水平,F3\'H,ANS,在果实色素沉着过程中,EH中的CHS和CHI比JFZ高4.39至73.12倍。总之,JFZ果皮中丰富的类胡萝卜素沉积与PSY的强表达密切相关,ZDS和ZEP,虽然EH果皮中花青素代谢产物的积累与F3H的表达上调密切相关,F3\'H,ANS,CHS和CHI。这项研究是第一个证明水果色素如何从野生到栽培枇杷物种进化的代谢背景,并通过对类胡萝卜素和花色苷生物合成的控制,为进一步选育更多彩色枇杷果实提供了基因靶标。
    Eriobotrya is an evergreen fruit tree native to South-West China and adjacent countries. There are more than 26 loquat species known in this genus, while E. japonica is the only species yet domesticated to produce fresh fruits from late spring to early summer. Fruits of cultivated loquat are usually orange colored, in contrast to the red color of fruits of wild E. henryi (EH). However, the mechanisms of fruit pigment formation during loquat evolution are yet to be elucidated. To understand these, targeted carotenoid and anthocyanin metabolomics as well as transcriptomics analyses were carried out in this study. The results showed that β-carotene, violaxanthin palmitate and rubixanthin laurate, totally accounted for over 60% of the colored carotenoids, were the major carotenoids in peel of the orange colored \'Jiefangzhong\' (JFZ) fruits. Total carotenoids content in JFZ is about 10 times to that of EH, and the expression levels of PSY, ZDS and ZEP in JFZ were 10.69 to 23.26 folds to that in EH at ripen stage. Cyanidin-3-O-galactoside and pelargonidin-3-O-galactoside were the predominant anthocyanins enriched in EH peel. On the contrary, both of them were almost undetectable in JFZ, and the transcript levels of F3H, F3\'H, ANS, CHS and CHI in EH were 4.39 to 73.12 folds higher than that in JFZ during fruit pigmentation. In summary, abundant carotenoid deposition in JFZ peel is well correlated with the strong expression of PSY, ZDS and ZEP, while the accumulation of anthocyanin metabolites in EH peel is tightly associated with the notably upregulated expressions of F3H, F3\'H, ANS, CHS and CHI. This study was the first to demonstrate the metabolic background of how fruit pigmentations evolved from wild to cultivated loquat species, and provided gene targets for further breeding of more colorful loquat fruits via manipulation of carotenoids and anthocyanin biosynthesis.
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  • 文章类型: Journal Article
    患有经前综合症(PMS)的女性患有严重的情绪问题,其发病机制被认为与下丘脑-垂体-肾上腺(HPA)轴有关,自主神经系统(ANS)和中枢神经系统(CNS)。我们考虑了所有三个方面来观察心理,有和没有PMS的大学生在愤怒和悲伤下的生理生化相关性。
    33名PMS学生和24名健康学生参加了情绪诱导实验,并被要求填写自我报告量表。他们的唾液皮质醇(SCort),皮肤电导率水平(SCL),心率变异性(HRV),血压(BP)和脑电图(EEG)数据收集在休息阶段和每个视频后10-15分钟。
    与健康对照相比,患有PMS的学生在休息时表现出较低的SCort水平和较高的VLF,情感视频后ANS和HPA轴的活动没有统计差异,但是在所有情况下脑电图的结果都不同。愤怒视频期间SBP的下降,在愤怒和中立的视频之后,悲伤视频中θ波段功率的增加与PMS评分的增加呈中等相关。自我报告情绪没有发现组间差异。
    患有PMS的学生在休息时HPA轴的活性较低,PNS的活性可能较高,和中枢神经系统在所有条件下不同的反应模式。几个脑电图频率,特别是θ波段,在情感视频中的特定脑区,以及减少HPA在处理愤怒和中性压力源方面的活动,其中额叶的γ活动可能起作用,与更严重的PMS表现出中度相关性。
    UNASSIGNED: Women with premenstrual syndrome (PMS) suffer heavily from emotional problems, the pathogenesis of which is believed to be related to the hypothalamic-pituitary-adrenal (HPA) axis, autonomic nervous system (ANS) and central nervous system (CNS). We took into account all 3 aspects to observed the psychological, physiological and biochemical correlations under anger and sadness in college students with and without PMS.
    UNASSIGNED: 33 students with PMS and 24 healthy students participated in the emotion induction experiment, and were required to fill out self-report scales. Their salivary cortisol (SCort), skin conductivity level (SCL), heart rate variability (HRV), blood pressure (BP) and electroencephalogram (EEG) data were collected at the resting stage and 10-15 minutes after each video.
    UNASSIGNED: Compared to healthy controls, students with PMS showed lower SCort level and higher VLF at rest, and no statistic difference in activities of ANS and HPA axis after emotional videos, but different results in EEG in all conditions. The decreases in SBP during angry video, SCort after angry and neutral videos, and increases in θ band power during sad video were moderately correlated with increases in PMS score. No intergroup differences were found in self-report emotions.
    UNASSIGNED: Students with PMS had lower activity of HPA axis and possibly higher activity of PNS at rest, and different response patterns in CNS in all conditions. Several EEG frequencies, especially θ band, in specific encephalic regions during emotional videos, as well as declined HPA activities in dealing with angry and neutral stressors, in which γ activity in frontal lobe may play a role, showed moderate correlations with more severe PMS.
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  • 文章类型: Journal Article
    结论:BraANS。A3是控制小白菜紫叶颜色的关键基因,绿白菜启动子区的两个短片段可能会干扰其正常表达。白菜(B.rapaL.ssp.中国)是一种有影响力的重要绿色蔬菜,黄色,或全世界种植的紫色叶子。紫色的叶子富含花青素,但是潜在的遗传学和进化还没有得到广泛的研究。紫色叶子的徒手切片表明,花色苷主要在整个正面和背面表皮叶细胞中积累。B.rapassp的F2种群的分离分析。紫叶突变体ZBC表明紫色性状受不完全显性核基因控制。批量分离分析(BSA)表明,控制该性状的关键基因在B.rapa的A03染色体上的24.25至38.10Mb之间。从注释的基因中,只有BraA03g050560.3C,同源拟南芥AtANS,与花青素合成途径有关。基因组注释结果和转录测序分析显示,BraANS。A3基因参与紫叶性状。qRT-PCR分析显示BraANS.A3在ZBC中高度上调,但在油菜纯合品系的叶片中几乎不表达。中国绿叶突变体WTC,表明Braans。A3在ZBC中催化花色苷合成中起关键作用。BraANS的全长序列比对。在WTC和ZBC中的A3显示它在基因区域高度保守,在启动子区域有显著的变异。特别是,WTC启动子区的两个短片段的插入可能会干扰其正常表达。6种芸苔属植物ANS的启动子区都有多个顺式元件参与对脱落酸的反应,光,和压力,提示ANS可能参与多种代谢途径或生物过程。蛋白质-蛋白质相互作用预测BraANS。A3与花青素苷合成途径中的几乎所有催化蛋白相互作用,并与透明Testa8(TT8)有很强的关系。这些结果表明BraANS。A3促进紫小白菜花色苷的积累,为大白菜花色苷相关基因的功能分析和转录调控网络提供新的见解。
    CONCLUSIONS: BraANS.A3 was the key gene controlling purple leaf color in pak choi, and two short fragments of promoter region in green pak choi might be interfering its normal expression. Pak choi (B. rapa L. ssp. chinensis) is an influential and important vegetable with green, yellow, or purple leaves that is cultivated worldwide. The purple leaves are rich in anthocyanins, but the underlying genetics and evolution have yet to be extensively studied. Free-hand sections of the purple leaves indicated that anthocyanins mainly accumulate throughout the adaxial and abaxial epidermal leaf cells. Segregation analyses of an F2 population of a B. rapa ssp. chinensis L. purple leaf mutant ZBC indicated that the purple trait is controlled by an incompletely dominant nuclear gene. Bulked segregant analysis (BSA) showed that the key genes controlling the trait were between 24.25 and 38.10 Mb on chromosome A03 of B. rapa. From the annotated genes, only BraA03g050560.3C, homologous to Arabidopsis AtANS, was related to the anthocyanin synthesis pathway. Genome annotation results and transcriptional sequencing analyses revealed that the BraANS.A3 gene was involved in the purple leaf trait. qRT-PCR analyses showed that BraANS.A3 was highly upregulated in ZBC but hardly expressed in the leaves of an inbred homozygous line of B. campestris ssp. chinensis L. green leaf mutant WTC, indicating that BraANS.A3 played a key role catalyzing anthocyanin synthesis in ZBC. Full-length sequence alignment of BraANS.A3 in WTC and ZBC showed that it was highly conserved in the gene region, with significant variation in the promoter region. In particular, the insertion of two short fragments of the promoter region in WTC may interfere with its normal expression. The promoter regions of ANS in six Brassica species all had multiple cis-elements involved in responses to abscisic acid, light, and stress, suggesting that ANS may be involved in multiple metabolic pathways or biological processes. Protein-protein interactions predicted that BraANS.A3 interacts with virtually all catalytic proteins in the anthocyanin synthesis pathway and has a strong relationship with Transparent Testa 8 (TT8). These results suggest that BraANS.A3 promotes anthocyanin accumulation in purple pak choi and provide new insights into the functional analysis of anthocyanin-related genes in Chinese cabbage and transcriptional regulatory networks.
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  • 文章类型: Journal Article
    该研究旨在确定AICVD患者的SSR特征及其与临床表现的相关性。
    上肢的SSR,美国国立卫生研究院卒中量表(NIHSS),Barthel指数(BI),埃森中风风险评分(ESRS),和影像学检查,对30例健康受试者和66例AICVD患者进行了评估。通过社会科学统计软件包(SPSS22.0)软件记录和分析所有结果。采用t检验和Spearman秩相关。
    与对照组相比,AICVD患者上肢SSR显示潜伏期延长,降低振幅,和消失波形(p=0.000,p=0.015,p=0.004),在患侧和健康侧之间没有观察到统计学上的显着差异(p=0.068,p=0.661)。在案例组中,SSR异常率越高,神经功能缺损(NIHSS和ADL评分)越严重,长期预后越差。具体结果如下:首先,SSR的总异常率,延长的SSR潜伏期与NIHSS呈正相关,ESRS(r=0.347,p=0.004;r=0.437,p<0.001),(r=0.371,p=0.005;r=0.433,p=0.001),波幅降低与NIHSS呈正相关(r=0.341,p=0.012),波幅消失与ESRS呈正相关(r=0.299,p=0.015);SSR的总异常率,延长的SSR潜伏期和降低的幅度与BI呈负相关(r=-0.346,p=0.004)(r=-0.426,p=0.001)(r=-0.316,p=0.020)。
    AICVD患者可能存在交感神经反射活动抑制,AICVD患者SSR异常率可能与神经功能缺损程度及远期预后相关。
    UNASSIGNED: The study aims to identify the characteristics of SSR in patients with AICVD and their correlation with clinical presentations.
    UNASSIGNED: SSR of the upper limbs, the National Institute of Health stroke scale (NIHSS), the Barthel index (BI), the Essen stroke risk score (ESRS), and imaging examinations, was evaluated in 30 healthy subjects and 66 patients with AICVD. All results were recorded and analyzed via Statistical Package for the Social Sciences (SPSS 22.0) software. t-test and Spearman rank correlation were used.
    UNASSIGNED: Compared to the control group, SSR of upper limbs in patients with AICVD showed prolonged latency, reduced amplitude, and disappeared waveform (p=0.000, p=0.015, p=0.004), No statistically significant difference was observed between the affected side and the healthy side (p=0.068, p=0.661). In the case group, the higher the abnormal rate of SSR, the more severe the neurological impairment (NIHSS and ADL scores) and the worse the long-term prognosis. Specific results are as follows: Firstly, the total abnormality rate of SSR, prolonged SSR latency were positively related to the NIHSS, also the ESRS (r=0.347, p=0.004; r=0.437, p<0.001), (r=0.371, p=0.005; r=0.433, p=0.001), the reduced amplitude was positively related to the NIHSS (r=0.341, p=0.012) while the disappeared waveform was positively related to the ESRS (r=0.299, p=0.015); Secondly, the total abnormality rate of SSR, prolonged SSR latency and reduced amplitude were negatively related to the BI (r=-0.346, p=0.004) (r=-0.426, p=0.001) (r=-0.316, p=0.020).
    UNASSIGNED: There may be inhibition of sympathetic reflex activity in patients with AICVD, SSR abnormality rate in patients with AICVD may be correlated with the degree of neurological impairment and long-term prognosis.
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  • 文章类型: Randomized Controlled Trial
    全身炎症因子对老年患者术后肺部并发症的预测作用尚不清楚。此外,机器学习模型很少用于老年患者的预测模型。
    我们回顾性评估了在6年内接受全身麻醉的老年患者。符合条件的患者以7:3的比例随机分配到开发组和验证组。采用最小逻辑绝对收缩和选择算子(LASSO)回归模型和多元逻辑回归分析选择最优特征。歧视,将最终模型的校准和净重新分类改善(NRI)与“评估加泰罗尼亚手术患者的呼吸风险”(ARISCAT)模型进行了比较。
    在分析的9775名患者中,8.31%开发PPC。最终的模型包括年龄,术前SpO2,ANS(白蛋白/NLR评分),操作时间,和红细胞(RBC)输血。开发队列和验证队列模型的一致性指数(C指数)值分别为0.740和0.748。两个队列中Hosmer-Lemeshow检验的P值不显著。我们的模型优于ARISCAT模型,C指数(0.740VS0.717,P=0.003)和NRI(0.117,P<0.001)。
    基于LASSO机器学习算法,在预测PPC风险方面,我们构建了优于ARISCAT模型的预测模型。临床医生可以利用这些预测因子来优化该患者人群的前瞻性和预防性干预措施。
    UNASSIGNED: The predictive effect of systemic inflammatory factors on postoperative pulmonary complications in elderly patients remains unclear. In addition, machine learning models are rarely used in prediction models for elderly patients.
    UNASSIGNED: We retrospectively evaluated elderly patients who underwent general anesthesia during a 6-year period. Eligible patients were randomly assigned in a 7:3 ratio to the development group and validation group. The Least logistic absolute shrinkage and selection operator (LASSO) regression model and multiple logistic regression analysis were used to select the optimal feature. The discrimination, calibration and net reclassification improvement (NRI) of the final model were compared with \"the Assess Respiratory Risk in Surgical Patients in Catalonia\" (ARISCAT) model.
    UNASSIGNED: Of the 9775 patients analyzed, 8.31% developed PPCs. The final model included age, preoperative SpO2, ANS (the Albumin/NLR Score), operation time, and red blood cells (RBC) transfusion. The concordance index (C-index) values of the model for the development cohort and the validation cohort were 0.740 and 0.748, respectively. The P values of the Hosmer-Lemeshow test in two cohorts were insignificant. Our model outperformed ARISCAT model, with C-index (0.740 VS 0.717, P = 0.003) and NRI (0.117, P < 0.001).
    UNASSIGNED: Based on LASSO machine learning algorithm, we constructed a prediction model superior to ARISCAT model in predicting the risk of PPCs. Clinicians could utilize these predictors to optimize prospective and preventive interventions in this patient population.
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  • 文章类型: Journal Article
    UNASSIGNED:开发并验证两个包含白蛋白/中性粒细胞与淋巴细胞比值(ANS)评分的列线图,以预测冠状动脉疾病(CAD)或亚临床CAD的风险。
    UNASSIGNED:在2015年9月至2017年6月期间连续纳入四百五十例疑似CAD患者行冠状动脉CT血管造影。基于CAD或亚临床CAD的独立预测因子建立列线图。
    未经批准:总共,纳入了437例疑似CAD患者,他们接受了冠状动脉CT血管造影。男性,年龄≥65岁,吸烟,高血压,糖尿病,血脂异常,缺血性卒中,和ANS是CAD和亚临床CAD的独立预测因子。每个列线图的曲线下面积分别为0.799(95%CI:0.752-0.846)和0.809(95%CI:0.762-0.856),分别。校准曲线和判定曲线分析显示诊断列线图的良好性能。ANS对CAD或亚临床CAD的预测没有被独立预测因子修改(所有,相互作用的p>0.05)。
    UNASSIGNED:我们基于ANS的列线图可以为疑似CAD或亚临床CAD患者提供准确和个性化的风险预测。
    UNASSIGNED: To develop and validate two nomograms incorporating the albumin/neutrophil-to-lymphocyte ratio score (ANS) for predicting the risk of coronary artery disease (CAD) or subclinical CAD.
    UNASSIGNED: Four hundred fifty patients with suspected CAD who underwent coronary computed tomographic angiography were consecutively enrolled between September 2015 and June 2017. Nomograms were established based on independent predictors of CAD or subclinical CAD.
    UNASSIGNED: In total, 437 patients with suspected CAD who underwent coronary computed tomographic angiography were included. Male sex, age ≥65 years, smoking, hypertension, diabetes, dyslipidemia, ischemic stroke, and ANS were independent predictors of CAD and subclinical CAD. The areas under the curve of each nomogram were 0.799 (95% CI: 0.752-0.846) and 0.809 (95% CI: 0.762-0.856), respectively. The calibration curve and decision curve analysis showed good performance for the diagnostic nomograms. The prediction of CAD or subclinical CAD by the ANS was not modified by the independent predictors (all, p for interaction >0.05).
    UNASSIGNED: Our ANS-based nomograms can provide accurate and individualized risk predictions for patients with suspected CAD or subclinical CAD.
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  • 文章类型: Journal Article
    背景:彩色大麦,可能对人类健康有益,比标准的白色品种更可取,但是种皮着色的代谢物和分子机制尚不清楚。
    结果:这里,对西藏无壳大麦的发展进行了监测,通过转录组学和代谢测定,在Nierumuzha(紫色)和Kunlun10(白色)中分析了3个种皮颜色发育阶段的18个生物样品。共鉴定出41种花色苷化合物和4186种DEGs。构建了西藏无壳大麦原花青素-花青素生物合成途径,包括12类结构酶的19个基因(PAL,C4H,4CL,CHS,CHI,F3H,F3\'H,DFR,ANS,ANR,GT,和ACT)。与Kunlun10相比,Nierumuzha中除ANR以外的11个DEG显着上调,导致该品种中15种花青素苷化合物的含量很高(比Kunlun10中的含量高25倍以上)。与Nierumuzha相比,Kunlun10中的ANR显着上调,导致三种花色苷化合物的含量较高(比Nierumuzha中的含量高5倍以上)。此外,22个TFs,包括MYBs,bHLHs,NAC,bZips,和WD40,与结构基因的表达模式呈显著正相关或负相关。此外,两个品种之间同源基因序列的比较在19个结构基因中的13个中鉴定出61个推定的SNP。在Kunlun10中的ANS基因的编码序列中鉴定出无义突变。这种突变可能编码一种无功能的蛋白质,进一步减少Kunlun10的花色苷积累。然后,我们使用WGCNA鉴定了3个模块对Nierumuzha(紫色)具有高度特异性。此外,获得并验证了12个DEGs同时出现在假定的原花青素-花青素生物合成途径和蛋白质共表达网络中。
    结论:我们的研究构建了西藏无壳大麦原花青素-花青素的生物合成途径。一系列的化合物,在该途径中获得了负责紫色和白色无壳大麦之间差异的结构基因和TFs。我们的研究提高了对大麦种子中花色苷积累和生物合成的分子机制的理解。为大麦花青素含量的遗传改良提供了新的靶点,为提高大麦营养品质提供了框架。
    BACKGROUND: Colored barley, which may have associated human health benefits, is more desirable than the standard white variety, but the metabolites and molecular mechanisms underlying seedcoat coloration remain unclear.
    RESULTS: Here, the development of Tibetan hulless barley was monitored, and 18 biological samples at 3 seedcoat color developmental stages were analyzed by transcriptomic and metabolic assays in Nierumuzha (purple) and Kunlun10 (white). A total of 41 anthocyanin compounds and 4186 DEGs were identified. Then we constructed the proanthocyanin-anthocyanin biosynthesis pathway of Tibetan hulless barley, including 19 genes encoding structural enzymes in 12 classes (PAL, C4H, 4CL, CHS, CHI, F3H, F3\'H, DFR, ANS, ANR, GT, and ACT). 11 DEGs other than ANR were significantly upregulated in Nierumuzha as compared to Kunlun10, leading to high levels of 15 anthocyanin compounds in this variety (more than 25 times greater than the contents in Kunlun10). ANR was significantly upregulated in Kunlun10 as compared to Nierumuzha, resulting in higher contents of three anthocyanins compounds (more than 5 times greater than the contents in Nierumuzha). In addition, 22 TFs, including MYBs, bHLHs, NACs, bZips, and WD40s, were significantly positively or negatively correlated with the expression patterns of the structural genes. Moreover, comparisons of homologous gene sequences between the two varieties identified 61 putative SNPs in 13 of 19 structural genes. A nonsense mutation was identified in the coding sequence of the ANS gene in Kunlun10. This mutation might encode a nonfunctional protein, further reducing anthocyanin accumulation in Kunlun10. Then we identified 3 modules were highly specific to the Nierumuzha (purple) using WGCNA. Moreover, 12 DEGs appeared both in the putative proanthocyanin-anthocyanin biosynthesis pathway and the protein co-expression network were obtained and verified.
    CONCLUSIONS: Our study constructed the proanthocyanin-anthocyanin biosynthesis pathway of Tibetan hulless barley. A series of compounds, structural genes and TFs responsible for the differences between purple and white hulless barley were obtained in this pathway. Our study improves the understanding of the molecular mechanisms of anthocyanin accumulation and biosynthesis in barley seeds. It provides new targets for the genetic improvement of anthocyanin content and a framework for improving the nutritional quality of barley.
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  • 文章类型: Journal Article
    花椒皮是我国八大调味品之一,因其独特的香味和麻木的味道而被广泛用于烹饪。花椒果实的颜色是影响消费者选择的最直观的品质。然而,花椒果实颜色的主要成分和关键生物合成基因尚未确定。为了更好地了解花椒果实颜色成分的生物合成机制和积累,我们对不同生长期的红花椒和绿花椒果实进行了转录组学和代谢组学综合分析。转录组分析确定了红色和绿色花椒果实之间的17,269个差异表达基因(DEGs):绿色果实中7,236个上调,而10,033个下调。液相色谱串联质谱(LC-MS/MS)鉴定出10种类型的214种类黄酮。黄酮类和黄酮醇是花椒中的主要类黄酮,红花椒的总黄酮含量高于绿花椒。综合分析表明,绿色和红色花椒的主要有色代谢产物是花青素-3-O-半乳糖苷和花青素-3-O-葡萄糖苷,这些代谢物含量的差异主要是由于ANS和UFGT表达的差异。我们的结果提供了深入了解红色和绿色花椒颜色差异的机制,并将有助于提高花椒果实的质量。
    Prickly ash peel is one of the eight major condiments in China and is widely used in cooking because of its unique fragrance and numbing taste. The color of prickly ash fruit is the most intuitive quality that affects consumer choice. However, the main components and key biosynthetic genes responsible for prickly ash fruit color have not yet been determined. To better understand the biosynthetic mechanisms and accumulation of prickly ash fruit color components, we performed an integrated transcriptomic and metabolomic analysis of red and green prickly ash fruit at different growth periods. The transcriptome analysis identified 17,269 differentially expressed genes (DEGs) between fruit of red and green prickly ash: 7,236 upregulated in green fruit and 10,033 downregulated. Liquid chromatography tandem mass spectrometry (LC-MS/MS) identified 214 flavonoids of 10 types. Flavonoids and flavonols are the main flavonoids in prickly ash, and the total flavonoid content of red prickly ash is higher than that of green prickly ash. Comprehensive analysis showed that the main colored metabolites that differed between green and red prickly ash were cyanidin-3-O-galactoside and cyanidin-3-O-glucoside, and differences in the contents of these metabolites were due mainly to differences in the expression of ANS and UFGT. Our results provide insight into the mechanisms underlying color differences in red and green prickly ash and will be useful for improving the quality of prickly ash fruit.
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