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Spitzer DC, Sun WY, Rodríguez-Vargas A, Hariharan IK. The cell adhesion molecule Echinoid promotes tissue survival and separately restricts tissue overgrowth in Drosophila imaginal discs. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.08.04.552072. [PMID: 37577631 PMCID: PMC10418178 DOI: 10.1101/2023.08.04.552072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
The interactions that cells in Drosophila imaginal discs have with their neighbors are known to regulate their ability to survive. In a screen of genes encoding cell surface proteins for gene knockdowns that affect the size or shape of mutant clones, we found that clones of cells with reduced levels of echinoid (ed) are fewer, smaller, and can be eliminated during development. In contrast, discs composed mostly of ed mutant tissue are overgrown. We find that ed mutant tissue has lower levels of the anti-apoptotic protein Diap1 and has increased levels of apoptosis which is consistent with the observed underrepresentation of ed mutant clones and the slow growth of ed mutant tissue. The eventual overgrowth of ed mutant tissue results not from accelerated growth, but from prolonged growth resulting from a failure to arrest growth at the appropriate final size. Ed has previously been shown to physically interact with multiple Hippo-pathway components and it has been proposed to promote Hippo pathway signaling, to exclude Yorkie (Yki) from the nucleus, and restrain the expression of Yki-target genes. We did not observe changes in Yki localization in ed mutant tissue and found decreased levels of expression of several Yorkie-target genes, findings inconsistent with the proposed effect of Ed on Yki. We did, however, observe increased expression of several Yki-target genes in wild-type cells neighboring ed mutant cells, which may contribute to elimination of ed mutant clones. Thus, ed has two distinct functions: an anti-apoptotic function by maintaining Diap1 levels, and a function to arrest growth at the appropriate final size. Both of these are unlikely to be explained by a simple effect on the Hippo pathway.
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Affiliation(s)
- Danielle C. Spitzer
- Department of Molecular and Cell Biology, 515 Weill Hall, University of California, Berkeley, Berkeley CA 94720-3200
| | - William Y. Sun
- Department of Molecular and Cell Biology, 515 Weill Hall, University of California, Berkeley, Berkeley CA 94720-3200
| | - Anthony Rodríguez-Vargas
- Department of Molecular and Cell Biology, 515 Weill Hall, University of California, Berkeley, Berkeley CA 94720-3200
| | - Iswar K. Hariharan
- Department of Molecular and Cell Biology, 515 Weill Hall, University of California, Berkeley, Berkeley CA 94720-3200
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Gao G, Hu S, Zhang K, Wang H, Xie Y, Zhang C, Wu R, Zhao X, Zhang H, Wang Q. Genome-Wide Gene Expression Profiles Reveal Distinct Molecular Characteristics of the Goose Granulosa Cells. Front Genet 2021; 12:786287. [PMID: 34992633 PMCID: PMC8725158 DOI: 10.3389/fgene.2021.786287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 11/30/2021] [Indexed: 11/24/2022] Open
Abstract
Granulosa cells (GCs) are decisive players in follicular development. In this study, the follicle tissues and GCs were isolated from the goose during the peak-laying period to perform hematoxylin-eosin staining and RNA-seq, respectively. Moreover, the dynamic mRNA and lncRNA expression profiles and mRNA-lncRNA network analysis were integrated to identify the important genes and lncRNAs. The morphological analysis showed that the size of the GCs did not significantly change, but the thickness of the granulosa layer cells differed significantly across the developmental stages. Subsequently, 14,286 mRNAs, 3,956 lncRNAs, and 1,329 TUCPs (transcripts with unknown coding potential) were detected in the GCs. We identified 37 common DEGs in the pre-hierarchical and hierarchical follicle stages, respectively, which might be critical for follicle development. Moreover, 3,089 significant time-course DEGs (Differentially expressed genes) and 13 core genes in 4 clusters were screened during goose GCs development. Finally, the network lncRNA G8399 with CADH5 and KLF2, and lncRNA G8399 with LARP6 and EOMES were found to be important for follicular development in GCs. Thus, the results would provide a rich resource for elucidating the reproductive biology of geese and accelerate the improvement of the egg-laying performance of geese.
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Affiliation(s)
- Guangliang Gao
- Chongqing Academy of Animal Sciences, Chongqing, China
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
- Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China
- *Correspondence: Guangliang Gao, ; Hongmei Zhang, ; Qigui Wang,
| | - Silu Hu
- Institute of Animal Genetics and Breeding, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, China
| | - Keshan Zhang
- Chongqing Academy of Animal Sciences, Chongqing, China
- Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China
| | - Haiwei Wang
- Chongqing Academy of Animal Sciences, Chongqing, China
- Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China
| | - Youhui Xie
- Chongqing Academy of Animal Sciences, Chongqing, China
- Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China
| | - Changlian Zhang
- Chongqing Academy of Animal Sciences, Chongqing, China
- Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China
| | - Rui Wu
- Chongqing Academy of Animal Sciences, Chongqing, China
| | - Xianzhi Zhao
- Chongqing Academy of Animal Sciences, Chongqing, China
- Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China
| | - Hongmei Zhang
- Department of Cardiovascular Ultrasound and Non-invasive Cardiology, Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, Chengdu, China
- Ultrasound in Cardiac Electrophysiology and Biomechanics Key Laboratory of Sichuan Province, Chengdu, China
- *Correspondence: Guangliang Gao, ; Hongmei Zhang, ; Qigui Wang,
| | - Qigui Wang
- Chongqing Academy of Animal Sciences, Chongqing, China
- Chongqing Engineering Research Center of Goose Genetic Improvement, Chongqing, China
- *Correspondence: Guangliang Gao, ; Hongmei Zhang, ; Qigui Wang,
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