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Transcriptomic changes in wild-type and Phlpp1-/- mice following KLA stimulation

ABSTRACT: Transcriptomic changes in wild-type and Phlpp1-/- mice following KLA stimulation

PROVIDER: PRJNA478064 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7439790.fastq.gz	Fastqsanger.gz
	SRR7439800.fastq.gz	Fastqsanger.gz
	SRR7439810.fastq.gz	Fastqsanger.gz
	SRR7439820.fastq.gz	Fastqsanger.gz
	SRR7439830.fastq.gz	Fastqsanger.gz

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Transcriptomic changes in wild-type and Phlpp1-/- mice following KLA stimulation

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Project description:Appendicular growth and bone mass acquisition are controlled by a variety of growth factors, hormones, and mechanical forces in a dynamic process called endochondral ossification. Chondrocytes in the growth plate must proliferate and undergo hypertrophy to drive growth plate expansion and lay the template for bone. Pleckstrin homology (PH) domain and leucine rich repeat phosphatase 1 and 2 (Phlpp1 and Phlpp2) are protein phosphatases that regulate intracellular signaling cascades through posttranslational modification of AKT, PKC, and S6K, among others. Phlpp1 controls chondrocyte proliferation and survival and germline deletion of Phlpp1 suppresses bone lengthening. Here, we demonstrate that Phlpp2 does not regulate endochondral ossification. Phlpp2-/- mice are phenotypically indistinguishable from their wildtype (WT) littermates, with similar bone length, bone mass, and growth plate dynamics. By contrast, Phlpp1/2-/- mice are phenotypically indistinguishable from Phlpp1-/- mice. Deletion of Phlpp1 or Phlpp2 had moderate effects on the chondrocyte transcriptome and proteome compared to WT control cells. By contrast, Phlpp1-/- and Phlpp1/2-/- chondrocytes had significantly altered phospho-proteomes compared to WT and Phlpp2-/- chondrocytes. Data integration via multiomics analysis revealed that RAF-MEK-ERK signaling was altered in cells lacking Phlpp1. In conclusion, these data demonstrate that Phlpp1, but not Phlpp2, regulates endochondral ossification via the chondrocyte phospho-proteome.

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Phlpp1 alters the murine chondrocyte phospho-proteome during endochondral bone formation

Project description:Appendicular skeletal growth and bone mass acquisition are controlled by a variety of growth factors, hormones, and mechanical forces in a dynamic process called endochondral ossification. In long bones, chondrocytes in the growth plate proliferate and undergo hypertrophy to drive bone lengthening and mineralization. Pleckstrin homology (PH) domain and leucine rich repeat phosphatase 1 and 2 (Phlpp1 and Phlpp2) are serine/threonine protein phosphatases that regulate cell proliferation, survival, and maturation via Akt, PKC, Raf1, S6k, and other intracellular signaling cascades. Germline deletion of Phlpp1 suppresses bone lengthening in part through parathyroid hormone receptor-dependent signaling in growth plate chondrocytes. Here, we demonstrate that Phlpp2 does not regulate endochondral ossification, and we define the molecular differences between Phlpp1 and Phlpp2 in chondrocytes. Phlpp2-/- mice are phenotypically indistinguishable from their wildtype (WT) littermates, with similar bone length, bone mass, and growth plate dynamics. Deletion of Phlpp2 had moderate effects on the chondrocyte transcriptome and proteome compared to WT cells. By contrast, Phlpp1/2-/- (double knockout) mice resembled Phlpp1-/- mice phenotypically and chondrocyte phospho-proteomes of Phlpp1-/- and Phlpp1/2-/- chondrocytes were different than WT and Phlpp2-/- chondrocyte phospho-proteomes. Data integration via multiparametric analysis identified alterations in Pdpk1 and Pak1/2 signaling pathways in chondrocytes lacking Phlpp1. In conclusion, these data demonstrate that Phlpp1, but not Phlpp2, regulates endochondral ossification through multiple and complex signaling cascades.

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