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71.
Diao Y Guo X Li Y Sun K Lu L Jiang L Fu X Zhu H Sun H Wang H Wu Z 《Cell Stem Cell》2012,11(2):231-241
In mouse skeletal muscles, Pax7 uniquely marks muscle satellite cells and plays some important yet unknown functions at the perinatal stage. To elucidate its in vivo functions, we initiated a yeast two-hybrid screening to look for Pax7-interacting proteins and identified a previously uncharacterized Pax7- and Pax3-binding protein (Pax3/7BP). Pax3/7BP is a ubiquitously expressed nuclear protein, enriched in Pax7+ muscle precursor cells (MPCs), and serves as an indispensable adaptor for Pax7 to recruit the histone 3 lysine 4 (H3K4) methyltransferase (HMT) complex by bridging Pax7 and Wdr5. Knockdown of Pax3/7BP abolished the Pax3/7-associated H3K4 HMT activity and inhibited the proliferation of Pax7+ MPCs from young mice both in culture and in vivo. Id3 and Cdc20 were direct target genes of Pax7 and Pax3/7BP involved in the proliferation of Pax7+ MPCs. Collectively, our work establishes Pax3/7BP as an essential adaptor linking Pax3/7 with the H3K4 HMT to regulate the proliferation of MPCs. 相似文献
72.
Zhou HL Yang HJ Li YM Wang Y Yan L Guo XL Ba YC Liu S Wang TH 《Neurochemical research》2008,33(5):927-937
Limited information is available regarding the role of endogenous Glial cell line-derived neurotrophic factor (GDNF) in the
spinal cord following transection injury. The present study investigated the possible role of GDNF in injured spinal cords
following transection injury (T9–T10) in adult rats. The locomotor function recovery of animals by the BBB (Basso, Beattie, Bresnahan) scale score showed that
hindlimb support and stepping function increased gradually from 7 days post operation (dpo) to 21 dpo. However, the locomotion
function in the hindlimbs decreased effectively in GDNF-antibody treated rats. GDNF immunoreactivty in neurons in the ventral
horn of the rostral stump was stained strongly at 3 and 7 dpo, and in the caudal stump at 14 dpo, while immunostaining in
astrocytes was also seen at all time-points after transection injury. Western blot showed that the level of GDNF protein underwent
a rapid decrease at 7 dpo in both stumps, and was followed by a partial recovery at a later time-point, when compared with
the sham-operated group. GDNF mRNA-positive signals were detected in neurons of the ventral horn, especially in lamina IX.
No regenerative fibers from corticospinal tract can be seen in the caudal segment near the injury site using BDA tracing technique.
No somatosensory evoked potentials (SEP) could be recorded throughout the experimental period as well. These findings suggested
that intrinsic GDNF in the spinal cord could play an essential role in neuroplasticity. The mechanism may be that GDNF is
involved in the regulation of local circuitry in transected spinal cords of adult rats. 相似文献
73.
Identification of a stable quantitative trait locus for percentage grains with white chalkiness in rice (Oryza sativa) 总被引:1,自引:0,他引:1
Guo T Liu X Wan X Weng J Liu S Liu X Chen M Li J Su N Wu F Cheng Z Guo X Lei C Wang J Jiang L Wan J 《植物学报(英文版)》2011,53(8):598-607
High chalkiness is a major problem in many rice-producing areas of the world, especially in hybrid rice (Oryza sativa L.) in China. We previously showed a major quantitative trait locus for the percentage of grains with white chalkiness (QTLqPGWC-8) in the interval G1149-R727 on chromosome 8 using a chromosome segment substitution line (CSSL). Here, we selected the line-CSSL50 harboring the QTLqPGWC-8 allele from the CSSLs derived from a cross between Asominori (as a recurrent parent) and IR24 (as a donor parent), which had higher percentage chalkiness, markedly different from that of Asominori. There were also significant differences in starch granules, appearance of amylose content (AAC) and milling qualities between Asominori and CSSL50, but not in grain size or thousand grain weight (TGW). The BC(4) F(2) and BC(4) F(3) populations from a cross between CSSL50 and Asominori were used for fine mapping of qPGWC-8. We narrowed down the location of this QTL to a 142 kb region between Indel markers 8G-7 and 8G-9. QTLqPGWC-8 accounted for 50.9% of the difference in PGWC between the parents. The markers tightly linked to qPGWC-8 should facilitate cloning of the gene underlying this QTL and will be of value for marker-assisted selection in breeding rice varieties with better grain quality. 相似文献
74.
朱砂叶螨对氧化乐果、三氯杀螨醇、双甲脒和哒螨灵产生抗性后(抗药性系数分别为152.83倍、55.59倍、62.61倍和15.67倍),繁殖力均显著降低,且发育加速。通过组建各品系生命表得知,该螨抗氧化乐果品系、抗三氯杀螨醇品质、抗双甲脒品系和抗哒螨灵品系的相对适合度分别为0.53、0.62、0.59和0.64,均小于1,具有明显的适合度缺陷。抗药性系数和相对适合度呈直线负相关。 相似文献
75.
Wang J Zhao W Cheng L Guo M Li D Li X Tan Y Ma S Li S Yang Y Chen L Wang S 《Journal of immunology (Baltimore, Md. : 1950)》2010,185(12):7654-7662
Chronic hepatitis B virus (HBV) infection is characterized by sustained liver inflammation with an influx of lymphocytes, which contributes to the development of cirrhosis and hepatocellular carcinoma. The mechanisms underlying this immune-mediated hepatic pathogenesis remain ill defined. We report in this article that repetitive infusion of anti-CD137 agonist mAb in HBV-transgenic mice closely mimics this process by sequentially inducing hepatitis, fibrosis, cirrhosis, and, ultimately, liver cancer. CD137 mAb initially triggers hepatic inflammatory infiltration due to activation of nonspecific CD8(+) T cells with memory phenotype. CD8(+) T cell-derived IFN-γ plays a central role in the progression of chronic liver diseases by actively recruiting hepatic macrophages to produce fibrosis-promoting cytokines and chemokines, including TNF-α, IL-6, and MCP-1. Importantly, the natural ligand of CD137 was upregulated significantly in circulating CD14(+) monocytes in patients with chronic hepatitis B infection and closely correlated with development of liver cirrhosis. Thus, sustained CD137 stimulation may be a contributing factor for liver immunopathology in chronic HBV infection. Our studies reveal a common molecular pathway that is used to defend against viral infection but also causes chronic hepatic diseases. 相似文献
76.
This study examined emotional modulation of word processing, showing that the recognition potential (RP), an ERP index of word recognition, could be modulated by different emotional states. In the experiment, participants were instructed to compete with pseudo-competitors, and via manipulation of the outcome of this competition, they were situated in neutral, highly positive, slightly positive, highly negative or slightly negative emotional states. They were subsequently asked to judge whether the referent of a word following a series of meaningless character segmentations was an animal or not. The emotional induction task and the word recognition task were alternated. Results showed that 1) compared with the neutral emotion condition, the peak latency of the RP under different emotional states was earlier and its mean amplitude was smaller, 2) there was no significant difference between RPs elicited under positive and negative emotional states in either the mean amplitude or latency, and 3) the RP was not affected by different degrees of positive emotional states. However, compared to slightly negative emotional states, the mean amplitude of the RP was smaller and its latency was shorter in highly negative emotional states over the left hemisphere but not over the right hemisphere. The results suggest that emotional states influence word processing. 相似文献
77.
Ni Zeng Tao Wang Mei Chen Zhicheng Yuan Jiangyue Qin Yanqiu Wu Lijuan Gao Yongchun Shen Lei Chen Fuqiang Wen 《Journal of cellular and molecular medicine》2019,23(8):5532-5541
As a novel kind of non‐coding RNA, circular RNAs (circRNAs) were involved in various biological processes. However, the role of circRNAs in the developmental process of chronic obstructive pulmonary disease (COPD) is still unclear. In the present study, by using a cell model of COPD in primary human small airway epithelial cells (HSAECs) treated with or without cigarette smoke extract (CSE), we uncovered 4,379 previously unknown circRNAs in human cells and 903 smoke‐specific circRNAs, with the help of RNA‐sequencing and bioinformatic analysis. Moreover, 3,872 up‐ and 4,425 down‐regulated mRNAs were also identified under CSE stimulation. Furthermore, a putative circRNA‐microRNA‐mRNA network was constructed for in‐depth mechanism exploration, which indicated that differentially expressed circRNAs could influence expression of some key genes that participate in response to pentose phosphate pathway, ATP‐binding cassette (ABC) transporters, glycosaminoglycan biosynthesis pathway and cancer‐related pathways. Our research indicated that cigarette smoke had an influence on the biogenesis of circRNAs and mRNAs. CircRNAs might be involved in the response to CSE in COPD through the circRNA‐mediated ceRNA networks. 相似文献
78.
79.
Yue Zhang Xuanshi Liu Ruolan Guo Wenjian Xu Qi Guo Chanjuan Hao Xin Ni Wei Li 《Bioscience reports》2021,41(7)
Autism spectrum disorder (ASD) is a highly heterogeneous neurodevelopmental condition characterized by atypical social interaction and communication together with repetitive behaviors and restricted interests. The prevalence of ASD has been increased these years. Compelling evidence has shown that genetic factors contribute largely to the development of ASD. However, knowledge about its genetic etiology and pathogenesis is limited. Broad applications of genomics studies have revealed the importance of gene mutations at protein-coding regions as well as the interrupted non-coding regions in the development of ASD. In this review, we summarize the current evidence for the known molecular genetic basis and possible pathological mechanisms as well as the risk genes and loci of ASD. Functional studies for the underlying mechanisms are also implicated. The understanding of the genetics and genomics of ASD is important for the genetic diagnosis and intervention for this condition. 相似文献
80.