growth and development

生长发育
  • 文章类型: Journal Article
    BW是影响绵羊生长发育的重要经济性状。目前,大多数研究使用单一方法筛选与绵羊BW性状相关的基因。为了解决这个限制,我们进行了全基因组关联研究(GWAS),涵盖了四个不同的BW时期:出生,断奶,6个月,和12个月。使用GWAS和绵羊数量性状基因座分析的组合筛选了五个新的候选基因:MAP3K1,ANKRD55,ABCB1,MEF2C和TRNAW-CCA-87。此外,对五个基因进行了基因本体论和京都基因百科全书和基因组途径富集分析。这些基因主要富集在与生长激素和能量代谢相关的途径中。结果表明,上述基因可能影响绵羊的生长发育。这五个新的候选基因与绵羊的BW性状密切相关,这对于理解BW性状的遗传机制和指导绵羊育种具有重要意义。
    BW is an important economic trait in sheep that influences growth and development. Currently, most studies have used a single approach to screen genes associated with BW traits in sheep. To address this limitation, we conducted a genome-wide association study (GWAS) covering four different BW periods: birth, weaning, 6 months, and 12 months. Five new candidate genes: MAP3K1, ANKRD55, ABCB1, MEF2C and TRNAW-CCA-87 were screened using a combination of GWAS and quantitative trait loci analysis in sheep. Additionally, five genes were subjected to Gene ontology and Kyoto Encyclopedia of Genes and Genomes pathway enrichment analyses. These genes were primarily enriched in pathways related to growth hormone and energy metabolism. The results demonstrated that the above genes potentially influenced the growth and development of sheep. The five new candidate genes are closely related to the BW trait in sheep, which will be valuable for understanding the genetic mechanisms underlying BW traits and for guiding sheep breeding.
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  • 文章类型: Journal Article
    目的:确定韩国典型发育儿童的韩国版改良Barthel指数(K-MBI)评分的标准值,并评估其在儿童中使用的适用性。
    方法:通过在线平台邀请有儿童的康复医师和职业治疗师参与一项使用K-MBI评估其儿童日常生活活动能力(ADL)的调查。问卷包括对儿童社会人口统计学信息的查询以及K-MBI中概述的评估标准。使用非线性最小二乘法估计按年龄划分的标准化K-MBI分数。
    结果:分析纳入了总共206名个体的反应。K-MBI总分在生命的前8年中迅速增加,99%的儿童在8岁时达到90分或更高。在儿童早期,流动性得分迅速增加,在3岁时超过最大分数的90%,在7岁时接近100%。相比之下,自我护理分数显示出更渐进的进步,到10岁时达到最高分数的大约100%。
    结论:建立了典型发育儿童的K-MBI分数的年龄特异性标准值,可作为临床护理的参考。虽然K-MBI捕捉到了儿童ADL发展的整体轨迹,它没有发现不同发育阶段的细微差异。需要开发专门针对儿童的更完善的评估工具。
    OBJECTIVE: To determine the normative values of the Korean version of the Modified Barthel Index (K-MBI) score for typically developing children in Korea and assess its suitability for use in children.
    METHODS: Rehabilitation physicians and occupational therapists with children were invited through an online platform to participate in a survey assessing their children\'s performance of activity of daily living (ADL) using the K-MBI. The questionnaire encompassed queries on sociodemographic information of children and the assessment criteria outlined in the K-MBI. The standardized K-MBI scores by age were estimated using the nonlinear least squares method.
    RESULTS: The analysis incorporated responses from a total of 206 individuals. K-MBI total scores showed a rapid increase over the first 8 years of life, with 99% of children achieving a score of 90 or higher by age 8. Mobility scores exhibited a swift increase during early childhood, surpassing 90% of the maximum score at 3 years of age and nearing 100% at 7 years of age. In contrast, self-care scores demonstrated a more gradual advancement, achieving approximately 100% of the maximum score by the age of 10 years.
    CONCLUSIONS: Age-specific normative values for K-MBI scores of typically developing children were established, which can be used as a reference in clinical care. While the K-MBI captured the overall trajectory of children\'s ADL development, it did not discern subtle differences across various developmental stages. There is a need for the development of more refined assessment tools tailored specifically to children.
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  • 文章类型: Journal Article
    尽管人们同意人类已经进化为异常肥胖的灵长类动物,狩猎采集者之间的脂肪模式很少得到经验考虑。在这里,我们考虑了四个当代狩猎采集者群体中肥胖的发展,阿卡,SavannaPué,Ju\'/Hoansi和Agta使用多级广义加性混合模型来表征从幼儿到青春期的三头肌皮褶的生长。与参考文献相反,狩猎采集者表现出几种一致的模式:(i)儿童瘦,脂肪堆积很少;(ii)5岁时没有明显的肥胖反弹;(iii)女孩平均拥有90%的体型,和达到初潮时,肥胖是在其最大速度;和(iv)代谢权衡是明显的年轻,但不是年龄较大的孩子,这样男孩和女孩在童年中期都优先考虑骨骼生长,在青春期,当身高速度随着脂肪积累而增加时,这种权衡会减少。生活在不同环境中的狩猎采集者的一致结果表明,这些模式反映了一般的觅食模式。这些发现为参考人群中不明显的脂肪发育提供了有价值的基线。我们强调狩猎采集者中的两种普遍趋势,人口间的差异表明人类组织生长和发育的可塑性。
    Despite agreement that humans have evolved to be unusually fat primates, adipose patterning among hunter-gatherers has received little empirical consideration. Here we consider the development of adiposity among four contemporary groups of hunter-gatherers, the Aka, Savanna Pumé, Ju\'/Hoansi and Agta using multi-level generalized additive mixed modelling to characterize the growth of tricep skinfolds from early childhood through adolescence. In contrast to references, hunter-gatherers show several consistent patterns: (i) children are lean with little fat accumulation; (ii) no adiposity rebound at 5 years is evident; (iii) girls on average have built 90% of their body size, and reach menarche when adiposity is at its maximum velocity; and (iv) a metabolic trade-off is evident in young, but not older children, such that both boys and girls prioritize skeletal growth during middle childhood, a trade-off that diminishes during adolescence when height velocity increases in pace with fat accumulation. Consistent results across hunter-gatherers living in diverse environments suggest that these patterns reflect a general forager pattern of development. The findings provide a valuable baseline for adipose development not apparent from reference populations. We emphasize both generalized trends among hunter-gatherers, and that inter-populational differences point to the plasticity with which humans organize growth and development.
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  • 文章类型: Journal Article
    背景:这项研究的目的是确定在一个团队中工作的两名受过训练的人体测量的可靠性,以及在初级卫生保健环境中与儿童的父母/照顾者一起工作的一名受过训练的人体测量的可靠性。研究设计:在加拿大的初级保健儿童研究网络中进行了一项观察性研究,以确定测量的可靠性。总的来说,120名0-5岁儿童的人体测量由两名训练有素的人体测量师在一个团队中工作两次,并由一名受过训练的人体测量师与儿童的父母/照顾者一起工作两次。使用技术测量误差(TEM)计算观察者间和观察者内的可靠性,相对TEM(%TEM),和可靠性系数(R)。结果:长度/身高和体重的%TEM值<2%,R系数值>0.99,表明观察者间和观察者内的可靠性很高。与其他人体测量参数相比,TEM值证明了观察者之间和观察者内部长度/高度测量的高度可靠性。然而,0~<2岁儿童的身长测量值和两个年龄组的臂围测量值差异较大.结论:这项研究表明,由一名训练有素的人体测量师在父母/照顾者的协助下进行的人体测量是可靠的。这些发现提供了证据,支持将儿童的父母/看护者纳入临床环境中的人体测量测量收集,以提高可行性和效率,并降低包括第二个受过训练的人体测量师的研究成本。
    Background: The purpose of this study was to determine the reliability of anthropometric measurements between two trained anthropometrists working in a team and one trained anthropometrist working with a child\'s parent/caregiver in a primary health care setting. Study Design: An observational study to determine measurement reliability was conducted in a primary care child research network in Canada. In total, 120 children 0-5 years old had their anthropometric measurement taken twice by two trained anthropometrists working in a team and twice by one trained anthropometrist working with a child\'s parent/caregiver. Inter- and intra-observer reliability was calculated using the technical error of measurement (TEM), relative TEM (%TEM), and the coefficient of reliability (R). Results: The %TEM values for length/height and weight were <2%, and the R coefficient values were >0.99, indicating a high degree of inter- and intra-observer reliability. The TEM values demonstrated a high degree of reliability for inter- and intra-observer measurement of length/height in comparison with other anthropometric measurement parameters. However, there was greater variation seen in the length measurement for children 0 to <2 years of age and in arm circumference measurement across both age-groups. Conclusion(s): This study suggests that anthropometric measurement taken by one trained anthropometrist with the assistance of a parent/caregiver is reliable. These findings provide evidence to support inclusion of a child\'s parent/caregiver with anthropometric measurement collection in clinical setting(s) to enhance feasibility and efficiency and reduce the research costs of including a second trained anthropometrist.
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  • 文章类型: Journal Article
    微小RNA(miRNA)是一类非编码内源性小分子,单链RNA,参与植物转录后基因表达调控,在植物生长发育中起重要作用。其中,miRNA156调控靶SPL基因家族成员,参与植物生长发育,荷尔蒙反应和逆境压力。然而,在人参中没有报道。在这项研究中,基于先前对SPL基因家族的分析,在根中获得了与年龄相关且稳定表达的SPL基因PgSPL24-09。使用靶基因预测工具分析miRNA156与该基因的结合位点,通过双荧光素酶报告基因测定和RT-qPCR验证了miRNA156与PgSPL24-09基因之间的相互作用。同时,构建miRNA156沉默载体和过表达载体,转化人参不定根和拟南芥,分析miRNA156-SPL模块调控人参不定根生长的分子机制。本研究为深入研究miRNAs在人参生长中的分子作用提供了理论依据,同时也为研究miRNA156-SPL模块在人参生长发育调控中的作用奠定了基础。
    MicroRNA (miRNA) is a class of non-coding endogenous small-molecule, single-stranded RNAs, and it is involved in post-transcriptional gene expression regulation in plants and plays an important role in plant growth and development. Among them, miRNA156 regulates members of target SPL gene family and thus participates in plant growth and development, hormonal response and adversity stress. However, it has not been reported in ginseng. In this study, based on the previous analysis of the SPL gene family, the age-related and stably expressed SPL gene PgSPL24-09 was obtained in roots. The binding site of miRNA156 to this gene was analyzed using target gene prediction tools, and the interactions between miRNA156 and PgSPL24-09 gene were verified by dual luciferase reporter gene assay and RT-qPCR. At the same time, miRNA156 silencing vector and overexpression vector were constructed and transformed into ginseng adventitious roots and Arabidopsis thaliana to analyze the molecular mechanism of miRNA156-SPL module in regulating the growth of ginseng adventitious roots. This study provides a theoretical basis for the in-depth study of the molecular role of miRNAs in ginseng growth, and also lays the foundation for the study of the role of miRNA156-SPL module in regulating the growth and development of ginseng.
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  • 文章类型: Journal Article
    精确而准确的结构叠加方法对于分析纵向研究中的牙面生长以及正畸或手术治疗至关重要。在高质量研究中尚未评估与不同叠加方法相关的错误。
    本研究旨在评估用于结构叠加的数字图像相关(DIC)的精度和准确性。
    使用三种DIC方法叠加了来自30名连续患者的两张头颅测量图像,每个由两名审查员测量两次。包括蝶鞍轮廓在内的区域,整个颅底(CB),使用随机系数模型比较了Walker点和筛板(WPLC)。对每种方法的评分者和评分者之间的误差进行了评估。
    WPLC为图像旋转和头影标志提供了最佳精度。在图像旋转的WPLC和CB方法与大多数标志之间观察到系统偏差。DIC期间图像旋转中的评分者内误差与前鼻脊柱标志中的评分者内误差密切相关,口齿不清,还有Pogonion.
    使用DIC与WPLC进行结构叠加是一种分析牙面生长和正畸或手术治疗的精确方法。此外,最好的方法是用WPLC和参考网格测量结构叠加的头颅射线照片上的纵向牙齿和颅面变化,该网格包括Walker点的真实垂直线和水平线。
    UNASSIGNED: A precise and accurate method for structural superimposition is essential for analyzing dentofacial growth and orthodontic or surgical treatment in longitudinal studies. The errors associated with different superimposition methods have not yet been assessed in high-quality studies.
    UNASSIGNED: This study aimed to assess the precision and accuracy of digital image correlation (DIC) for structural superimposition.
    UNASSIGNED: Two cephalometric images from 30 consecutive patients were superimposed using three DIC methods, each measured twice by two examiners. Areas including the contours of the sella, the whole cranial base (CB), and Walker\'s point and lamina cribrosa (WPLC) were compared using a random coefficient model. Inter-rater and intra-rater errors were assessed for each method.
    UNASSIGNED: WPLC provided the best precision for image rotation and cephalometric landmarks. Systematic bias was observed between the WPLC and CB methods for image rotation and most landmarks. The intra-rater error in image rotation during DIC was strongly correlated with the intra-rater error in the landmarks of the anterior nasal spine, articulare, and pogonion.
    UNASSIGNED: Structural superimposition using DIC with WPLC is a precise method for analyzing dentofacial growth and orthodontic or surgical treatment. Moreover, the best method is the measurement of longitudinal dental and craniofacial changes on structurally superimposed cephalometric radiographs with WPLC and a reference grid including the true vertical and horizontal lines from Walker\'s point.
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  • 文章类型: Journal Article
    确定与颅面形态有关的牙骨参数与上气道(UA)体积之间的相关性。
    使用NemoFabOrtho软件分析了106例随机选择的正畸患者的锥形束计算机断层扫描图像。评估的牙骨骼变量是前面部高度(AFH),后面部高度(PFH),PFH/AFH比值,舌骨位置,上颌宽度(MW),和腭深。还使用相同的软件评估UA体积(在解剖区域和作为整体的评估)。我们还评估了年龄和性别组之间UA变量的潜在差异。使用Pearson相关系数(R)计算牙骨参数与UA体积之间的相关性。进行方差分析和学生t检验以评估UA变量的年龄和性别之间的差异。使用SPSS软件(用于Windows的版本26)进行统计分析。
    这项研究发现,PFH,AFH,和MW是与UA体积最密切相关的牙骨骼参数。然而,ANB角度与UA体积无显著相关性.此外,观察到各年龄组之间UA体积的差异.在口咽部和咽部体积的“8-12”和“≥16”年龄组中都发现了性别差异。
    总而言之,我们的发现表明UA体积与牙骨骼参数之间存在显着相关性,特别是那些与面部高度和MW有关的。
    UNASSIGNED: To determine the correlation between dentoskeletal parameters related to craniofacial morphology and the upper airway (UA) volume.
    UNASSIGNED: Cone-beam computed tomography images of 106 randomly selected orthodontic patients were analyzed using NemoFab Ortho software. The dentoskeletal variables assessed were anterior facial height (AFH), posterior facial height (PFH), PFH/AFH ratio, hyoid position, maxillary width (MW), and palatal depth. The UA volume (evaluation in anatomical regions and as a whole) was also assessed using the same software. We also evaluated potential differences in UA variables between age and sex groups. The correlation between the dentoskeletal parameters and UA volume was calculated using the Pearson correlation coefficient (R). Analysis of variance and Student\'s t test were performed to assess differences between age and sex for UA variables. Statistical analyses were performed using SPSS software (version 26 for Windows).
    UNASSIGNED: This study found that PFH, AFH, and MW were the dentoskeletal parameters most strongly correlated with UA volume. However, the ANB angle did not show any significant correlation with UA volume. Additionally, differences in UA volumes were observed between age groups. Sex differences were found in both the \"8-12\" and \"≥ 16\" age groups for oropharyngeal and pharyngeal volumes.
    UNASSIGNED: In conclusion, our findings indicate a significant correlation between UA volume and dentoskeletal parameters, particularly those related to facial height and MW.
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  • 文章类型: Journal Article
    马刺猴是一种高度多食的害虫,对各种作物构成重大威胁。,特别是在世界上的热带和亚热带地区。虽然已经对这种害虫进行了广泛的生理和生物学研究,遗传信息的缺乏阻碍了我们对其生长的分子机制的理解,发展,和外源性生物代谢。细胞色素P450基因,普遍存在于生物体中的CYP基因超家族成员与生长有关,发展,以及内源性和外源性物质的代谢,有助于昆虫在不同环境中的适应性。为了阐明CYP450基因家族在黑质分枝杆菌中的具体作用,该基因在很大程度上仍未被探索,构建了粉红色mealybug的从头转录组组装。通过跨不同数据库的预测蛋白质序列的同源性搜索,总共120种蛋白质被注释为CYP450基因。系统发育研究导致将120个CYP450基因分为四个CYP氏族。总共对22个CYP450家族和30个亚家族进行了分类,CYP6形成显性家族。该研究还揭示了与昆虫激素生物合成途径相关的五个基因(万圣节基因)。Further,使用qRT-PCR跨爬虫研究了十个选定的CYP450基因的表达,若虫,和成人阶段,并确定了在昆虫特定阶段表达的基因。因此,这项研究的发现揭示了CYP450基因家族在生长中的表达动态和可能的功能,发展,以及可以进一步进行功能验证的陆生M.hirsutus的适应性策略。
    Maconellicoccus hirsutus is a highly polyphagous insect pest, posing a substantial threat to various crop sp., especially in the tropical and sub-tropical regions of the world. While extensive physiological and biological studies have been conducted on this pest, the lack of genetic information has hindered our understanding of the molecular mechanisms underlying its growth, development, and xenobiotic metabolism. The Cytochrome P450 gene, a member of the CYP gene superfamily ubiquitous in living organisms is associated with growth, development, and the metabolism of both endogenous and exogenous substances, contributing to the insect\'s adaptability in diverse environments. To elucidate the specific role of the CYP450 gene family in M. hirsutus which has remained largely unexplored, a de novo transcriptome assembly of the pink mealybug was constructed. A total of 120 proteins were annotated as CYP450 genes through homology search of the predicted protein sequences across different databases. Phylogenetic studies resulted in categorizing 120 CYP450 genes into four CYP clans. A total of 22 CYP450 families and 30 subfamilies were categorized, with CYP6 forming the dominant family. The study also revealed five genes (Halloween genes) associated with the insect hormone biosynthesis pathway. Further, the expression of ten selected CYP450 genes was studied using qRT-PCR across crawler, nymph, and adult stages, and identified genes that were expressed at specific stages of the insects. Thus, the findings of this study reveal the expression dynamics and possible function of the CYP450 gene family in the growth, development, and adaptive strategies of M. hirsutus which can be further functionally validated.
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  • 文章类型: Journal Article
    通过甲基转移酶可逆调节真核RNA的N6-甲基腺苷(m6A)甲基化是影响RNA代谢的重要表观遗传事件。因此,m6A甲基化在调节动物生长中起着至关重要的作用,发展,繁殖,和疾病进展。在这里,我们回顾了m6A甲基化修饰的最新研究进展,并讨论了生长背景下的调控方面,发展,和牲畜的繁殖特性。强调了新的见解,并讨论了研究m6A甲基化修饰在塑造经济重要性状方面的观点。
    Reversible regulation of N6-methyladenosine (m6A) methylation of eukaryotic RNA via methyltransferases is an important epigenetic event affecting RNA metabolism. As such, m6A methylation plays crucial roles in regulating animal growth, development, reproduction, and disease progression. Herein, we review the latest research advancements in m6A methylation modifications and discuss regulatory aspects in the context of growth, development, and reproductive traits of livestock. New insights are highlighted and perspectives for the study of m6A methylation modifications in shaping economically important traits are discussed.
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  • 文章类型: Journal Article
    本研究旨在研究不同配方成分对大鼠脑生长的影响。将50只雄性SD大鼠随机分为5组:基本饮食组;20%普通奶粉组;20%特殊奶粉组;30%普通奶粉组;和30%特殊奶粉组。LC-MS用于检测脑脂质组学。喂食28天后,与基本饮食组相比,30%普通奶粉组大鼠的脑/体重增加。30%普通奶粉组血清5-HIAA含量低于20%普通奶粉组。与基本饮食组相比,DLCL的表达式,MePC,PI,GM1在添加特殊奶粉的组中较高,而LPE的表达式,LdMePE,SM,添加普通奶粉组的MGTG较高。20%普通组MBP表达显著增高。本研究发现婴幼儿奶粉的不同配方成分会影响SD大鼠的大脑发育。添加特殊配方婴儿奶粉可能通过调节脑脂质表达对大鼠大脑产生有益作用。
    This investigation was to study the effects of different formula components on the brain growth of rats. Fifty male SD rats were randomly divided into five groups: a basic diet group; a 20% ordinary milk powder group; a 20% special milk powder group; a 30% ordinary milk powder group; and a 30% special milk powder group by weight. LC-MS was used to detect brain lipidomics. After 28 days of feeding, compared with the basic diet group, the brain/body weights of rats in the 30% ordinary milk powder group were increased. The serum levels of 5-HIAA in the 30% ordinary milk powder group were lower than in the 20% ordinary milk powder group. Compared with the basic diet group, the expressions of DLCL, MePC, PI, and GM1 were higher in the groups with added special milk powder, while the expressions of LPE, LdMePE, SM, and MGTG were higher in the groups with added ordinary milk powder. The expression of MBP was significantly higher in the 20% ordinary group. This study found that different formula components of infant milk powder could affect brain growth in SD rats. The addition of special formula infant milk powder may have beneficial effects on rat brains by regulating brain lipid expression.
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