Life Science Alliance最新文献_第3页

Defects in integrin complex formation promote CHKB-mediated muscular dystrophy. 整合素复合物形成缺陷会促进 CHKB 介导的肌肉萎缩症。

IF 3.3 2区生物学

Life Science Alliance Pub Date : 2024-05-15 Print Date: 2024-08-01 DOI: 10.26508/lsa.202301956

Mahtab Tavasoli, Christopher R McMaster

{"title":"Defects in integrin complex formation promote CHKB-mediated muscular dystrophy.","authors":"Mahtab Tavasoli, Christopher R McMaster","doi":"10.26508/lsa.202301956","DOIUrl":"10.26508/lsa.202301956","url":null,"abstract":"Phosphatidylcholine (PC) is the major membrane phospholipid in most eukaryotic cells. Bi-allelic loss of function variants in CHKB, encoding the first step in the synthesis of PC, is the cause of a rostrocaudal muscular dystrophy in both humans and mice. Loss of sarcolemma integrity is a hallmark of muscular dystrophies; however, how this occurs in the absence of choline kinase function is not known. We determine that in Chkb -/- mice there is a failure of the α7β1 integrin complex that is specific to affected muscle. We observed that in Chkb -/- hindlimb muscles there is a decrease in sarcolemma association/abundance of the PI(4,5)P2 binding integrin complex proteins vinculin, and α-actinin, and a decrease in actin association with the sarcolemma. In cells, pharmacological inhibition of choline kinase activity results in internalization of a fluorescent PI(4,5)P2 reporter from discrete plasma membrane clusters at the cell surface membrane to cytosol, this corresponds with a decreased vinculin localization at plasma membrane focal adhesions that was rescued by overexpression of CHKB.","PeriodicalId":18081,"journal":{"name":"Life Science Alliance","volume":null,"pages":null},"PeriodicalIF":3.3,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11096732/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140945277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Systems genetics analysis of human body fat distribution genes identifies adipocyte processes. 人体脂肪分布基因的系统遗传学分析确定了脂肪细胞过程。

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-05-03 DOI: 10.26508/lsa.202402603

Jordan N Reed, Jiansheng Huang, Yong Li, Lijiang Ma, Dhanush Banka, Martin Wabitsch, Tianfang Wang, Wen Ding, Johan Lm Björkegren, Mete Civelek

{"title":"Systems genetics analysis of human body fat distribution genes identifies adipocyte processes.","authors":"Jordan N Reed, Jiansheng Huang, Yong Li, Lijiang Ma, Dhanush Banka, Martin Wabitsch, Tianfang Wang, Wen Ding, Johan Lm Björkegren, Mete Civelek","doi":"10.26508/lsa.202402603","DOIUrl":"https://doi.org/10.26508/lsa.202402603","url":null,"abstract":"Excess abdominal fat is a sexually dimorphic risk factor for cardio-metabolic disease and is approximated by the waist-to-hip ratio adjusted for body mass index (WHRadjBMI). Whereas this trait is highly heritable, few causal genes are known. We aimed to identify novel drivers of WHRadjBMI using systems genetics. We used two independent cohorts of adipose tissue gene expression and constructed sex- and depot-specific Bayesian networks to model gene-gene interactions from 8,492 genes. Using key driver analysis, we identified genes that, in silico and putatively in vitro, regulate many others. 51-119 key drivers in each network were replicated in both cohorts. In other cell types, 23 of these genes are found in crucial adipocyte pathways: Wnt signaling or mitochondrial function. We overexpressed or down-regulated seven key driver genes in human subcutaneous pre-adipocytes. Key driver genes ANAPC2 and RSPO1 inhibited adipogenesis, whereas PSME3 increased adipogenesis. RSPO1 increased Wnt signaling activity. In differentiated adipocytes, MIGA1 and UBR1 down-regulation led to mitochondrial dysfunction. These five genes regulate adipocyte function, and we hypothesize that they regulate fat distribution.","PeriodicalId":18081,"journal":{"name":"Life Science Alliance","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140841512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

VDR restores the expression of PINK1 and BNIP3 in TECs of streptozotocin-induced diabetic mice. VDR 可恢复链脲佐菌素诱导的糖尿病小鼠 TEC 中 PINK1 和 BNIP3 的表达。

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-05-02 DOI: 10.26508/lsa.202302474

Cheng Yang, Bin Yi, Shikun Yang, Aimei Li, Jishi Liu, Jianwen Wang, Jun Liu, Zhi Li, Qin Liao, Wei Zhang, Hao Zhang

{"title":"VDR restores the expression of PINK1 and BNIP3 in TECs of streptozotocin-induced diabetic mice.","authors":"Cheng Yang, Bin Yi, Shikun Yang, Aimei Li, Jishi Liu, Jianwen Wang, Jun Liu, Zhi Li, Qin Liao, Wei Zhang, Hao Zhang","doi":"10.26508/lsa.202302474","DOIUrl":"https://doi.org/10.26508/lsa.202302474","url":null,"abstract":"Defective mitophagy in renal tubular epithelial cells is one of the main drivers of renal fibrosis in diabetic kidney disease. Our gene sequencing data showed the expression of PINK1 and BNIP3, two key molecules of mitophagy, was decreased in renal tissues of VDR-knockout mice. Herein, streptozotocin (STZ) was used to induce renal interstitial fibrosis in mice. VDR deficiency exacerbated STZ-induced renal impairment and defective mitophagy. Paricalcitol (pari, a VDR agonist) and the tubular epithelial cell-specific overexpression of VDR restored the expression of PINK1 and BNIP3 in the renal cortex and attenuated STZ-induced kidney fibrosis and mitochondrial dysfunction. In HK-2 cells under high glucose conditions, an increased level of α-SMA, COL1, and FN and a decreased expression of PINK1 and BNIP3 with severe mitochondrial damage were observed, and these alterations could be largely reversed by pari treatment. ChIP-qPCR and luciferase reporter assays showed VDR could positively regulate the transcription of Pink1 and Bnip3 genes. These findings reveal that VDR could restore mitophagy defects and attenuate STZ-induced fibrosis in diabetic mice through regulation of PINK1 and BNIP3.","PeriodicalId":18081,"journal":{"name":"Life Science Alliance","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140841629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Renal antiporter ClC-5 regulates collagen I/IV through the β-catenin pathway and lysosomal degradation. 肾脏拮抗剂ClC-5通过β-catenin途径和溶酶体降解调节胶原蛋白I/IV。

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-04-26 DOI: 10.26508/lsa.202302444

Mònica Durán, Gema Ariceta, Maria E Semidey, Carla Castells-Esteve, Andrea Casal-Pardo, Baisong Lu, Anna Meseguer, Gerard Cantero-Recasens

{"title":"Renal antiporter ClC-5 regulates collagen I/IV through the β-catenin pathway and lysosomal degradation.","authors":"Mònica Durán, Gema Ariceta, Maria E Semidey, Carla Castells-Esteve, Andrea Casal-Pardo, Baisong Lu, Anna Meseguer, Gerard Cantero-Recasens","doi":"10.26508/lsa.202302444","DOIUrl":"https://doi.org/10.26508/lsa.202302444","url":null,"abstract":"Mutations in Cl-/H+ antiporter ClC-5 cause Dent's disease type 1 (DD1), a rare tubulopathy that progresses to renal fibrosis and kidney failure. Here, we have used DD1 human cellular models and renal tissue from DD1 mice to unravel the role of ClC-5 in renal fibrosis. Our results in cell systems have shown that ClC-5 deletion causes an increase in collagen I (Col I) and IV (Col IV) intracellular levels by promoting their transcription through the β-catenin pathway and impairing their lysosomal-mediated degradation. Increased production of Col I/IV in ClC-5-depleted cells ends up in higher release to the extracellular medium, which may lead to renal fibrosis. Furthermore, our data have revealed that 3-mo-old mice lacking ClC-5 (Clcn5 +/- and Clcn5 -/- ) present higher renal collagen deposition and fibrosis than WT mice. Altogether, we describe a new regulatory mechanism for collagens' production and release by ClC-5, which is altered in DD1 and provides a better understanding of disease progression to renal fibrosis.","PeriodicalId":18081,"journal":{"name":"Life Science Alliance","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140803802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lineage-specific changes in mitochondrial properties during neural stem cell differentiation. 神经干细胞分化过程中线粒体特异性变化

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-04-25 DOI: 10.26508/lsa.202302473

Rita Soares, Diogo M. Lourenço, Isa F Mota, A. Sebastião, S. Xapelli, V. A. Morais

{"title":"Lineage-specific changes in mitochondrial properties during neural stem cell differentiation.","authors":"Rita Soares, Diogo M. Lourenço, Isa F Mota, A. Sebastião, S. Xapelli, V. A. Morais","doi":"10.26508/lsa.202302473","DOIUrl":"https://doi.org/10.26508/lsa.202302473","url":null,"abstract":"Neural stem cells (NSCs) reside in discrete regions of the adult mammalian brain where they can differentiate into neurons, astrocytes, and oligodendrocytes. Several studies suggest that mitochondria have a major role in regulating NSC fate. Here, we evaluated mitochondrial properties throughout NSC differentiation and in lineage-specific cells. For this, we used the neurosphere assay model to isolate, expand, and differentiate mouse subventricular zone postnatal NSCs. We found that the levels of proteins involved in mitochondrial fusion (Mitofusin [Mfn] 1 and Mfn 2) increased, whereas proteins involved in fission (dynamin-related protein 1 [DRP1]) decreased along differentiation. Importantly, changes in mitochondrial dynamics correlated with distinct patterns of mitochondrial morphology in each lineage. Particularly, we found that the number of branched and unbranched mitochondria increased during astroglial and neuronal differentiation, whereas the area occupied by mitochondrial structures significantly reduced with oligodendrocyte maturation. In addition, comparing the three lineages, neurons revealed to be the most energetically flexible, whereas astrocytes presented the highest ATP content. Our work identified putative mitochondrial targets to enhance lineage-directed differentiation of mouse subventricular zone-derived NSCs.","PeriodicalId":18081,"journal":{"name":"Life Science Alliance","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140656080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

iMPAQT reveals that adequate mitohormesis from TFAM overexpression leads to life extension in mice. iMPAQT显示，TFAM过表达产生的充分有丝分裂可使小鼠寿命延长。

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-04-25 DOI: 10.26508/lsa.202302498

K. Igami, Hiroki Kittaka, Mikako Yagi, K. Gotoh, Yuichi Matsushima, Tomomi Ide, Masataka Ikeda, Saori Ueda, Shin-Ichiro Nitta, Manami Hayakawa, Keiichi I Nakayama, Masaki Matsumoto, Dongchon Kang, Takeshi Uchiumi

{"title":"iMPAQT reveals that adequate mitohormesis from TFAM overexpression leads to life extension in mice.","authors":"K. Igami, Hiroki Kittaka, Mikako Yagi, K. Gotoh, Yuichi Matsushima, Tomomi Ide, Masataka Ikeda, Saori Ueda, Shin-Ichiro Nitta, Manami Hayakawa, Keiichi I Nakayama, Masaki Matsumoto, Dongchon Kang, Takeshi Uchiumi","doi":"10.26508/lsa.202302498","DOIUrl":"https://doi.org/10.26508/lsa.202302498","url":null,"abstract":"Mitochondrial transcription factor A, TFAM, is essential for mitochondrial function. We examined the effects of overexpressing the TFAM gene in mice. Two types of transgenic mice were created: TFAM heterozygous (TFAM Tg) and homozygous (TFAM Tg/Tg) mice. TFAM Tg/Tg mice were smaller and leaner notably with longer lifespans. In skeletal muscle, TFAM overexpression changed gene and protein expression in mitochondrial respiratory chain complexes, with down-regulation in complexes 1, 3, and 4 and up-regulation in complexes 2 and 5. The iMPAQT analysis combined with metabolomics was able to clearly separate the metabolomic features of the three types of mice, with increased degradation of fatty acids and branched-chain amino acids and decreased glycolysis in homozygotes. Consistent with these observations, comprehensive gene expression analysis revealed signs of mitochondrial stress, with elevation of genes associated with the integrated and mitochondrial stress responses, including Atf4, Fgf21, and Gdf15. These found that mitohormesis develops and metabolic shifts in skeletal muscle occur as an adaptive strategy.","PeriodicalId":18081,"journal":{"name":"Life Science Alliance","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140658422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

lncRNA LINC00941 modulates MTA2/NuRD occupancy to suppress premature human epidermal differentiation lncRNA LINC00941调节MTA2/NuRD的占有率，抑制人类表皮过早分化

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-04-22 DOI: 10.26508/lsa.202302475

Eva Morgenstern, Carolin Molthof, Uwe Schwartz, Johannes Graf, Astrid Bruckmann, Sonja Hombach, Markus Kretz

引用次数: 0

Porphyrin overdrive rewires cancer cell metabolism 卟啉过度驱动重塑癌细胞新陈代谢

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-04-22 DOI: 10.26508/lsa.202302547

S. Adapa, Gregory A. Hunter, Narmin E. Amin, Christopher Marinescu, Andrew Borsky, Elizabeth M Sagatys, Said M. Sebti, Gary W. Reuther, Gloria C Ferreira, R. H. Jiang

引用次数: 0

Combining sophisticated fast FLIM, confocal microscopy, and STED nanoscopy for live-cell imaging of tunneling nanotubes 结合先进的快速 FLIM、共聚焦显微镜和 STED 纳米镜，对隧道纳米管进行活细胞成像

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-04-22 DOI: 10.26508/lsa.202302398

M. Bénard, Christophe Chamot, D. Schapman, Aurélien Debonne, A. Lebon, Fatéméh Dubois, G. Levallet, Hitoshi Komuro, Ludovic Galas

引用次数: 0

Autocrine VEGF drives neural stem cell proximity to the adult hippocampus vascular niche 血管内皮生长因子自分泌驱动神经干细胞接近成体海马血管龛

IF 4.4 2区生物学

Life Science Alliance Pub Date : 2024-04-17 DOI: 10.26508/lsa.202402659

Tyler J. Dause, Jiyeon K. Denninger, Robert Osap, Ashley E. Walters, Joshua D. Rieskamp, E. D. Kirby

引用次数: 0