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- W4377221310 abstract "Substantial advances have been made in understanding the role of partial PDZ and LIM domain family's proteins in skeletal-related diseases. Yet, little is known about the effect of PDZ and LIM Domain 1 (Pdlim1) on osteogenesis and fracture repair. This study aimed to investigate whether direct gene delivery using an adenovirus vector carrying Pdlim1 (Ad-oePdlim1) or encoding shRNA-Pdlim1 (Ad-shPdlim1) could affect the osteogenic activity of preosteoblastic MC3T3-E1 cells in vitro, and influence the fracture healing of mice in vivo. We found that Ad-shPdlim1 transfection contributed to the calcified nodule formation in MC3T3-E1 cells. Downregulation of Pdlim1 enhanced the alkaline phosphatase activity and increased the expression of osteogenic markers (Runt-related transcription factor 2 [Runx2], collagen type I alpha 1 chain [Col1A1], osteocalcin [OCN], and osteopontin [OPN]). Further analysis indicated that Pdlim1 knockdown could activate β-catenin signaling, as evidenced by the accumulation of β-catenin in the nucleus and the increase levels of downstream regulators such as Lef1/Tcf7, axis inhibition protein 2, cyclin D1, and SRY-box transcription factor 9. By contrast, Pdlim1 overexpression resulted in inhibition of the osteogenic activity of MC3T3-E1 cells. In vivo, at day 3 after fracture,Ad-shPdlim1 adenovirus particles were injected into the fracture site of the femur of mice, and the process of fracture healing was evaluated by X-ray, micro-computed tomography and histological examination. Local injection of Ad-shPdlim1 promoted the early cartilage callus formation, restored bone mineral density, and accelerated cartilaginous ossification, with the upregulation of osteogenic gene (Runx2, Col1A1, OCN, and OPN) expression and activation of β-catenin signaling. Thus, we concluded that inhibition of Pdlim1 contributed to osteogenesis and fracture healing by activating the β-catenin signaling pathway." @default.
- W4377221310 created "2023-05-23" @default.
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- W4377221310 date "2023-07-01" @default.
- W4377221310 modified "2023-10-17" @default.
- W4377221310 title "Direct Knockdown of PDZ and LIM Domain 1 Using an Adenoviral Delivery System Accelerates Osteogenesis and Fracture Healing in Mice" @default.
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- W4377221310 doi "https://doi.org/10.1089/hum.2023.009" @default.
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