دورية أكاديمية
IP6K1 Reduces Mesenchymal Stem/Stromal Cell Fitness and Potentiates High Fat Diet-Induced Skeletal Involution
| العنوان: | IP6K1 Reduces Mesenchymal Stem/Stromal Cell Fitness and Potentiates High Fat Diet-Induced Skeletal Involution |
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| المؤلفون: | Boregowda, Siddaraju V., Ghoshal, Sarbani, Booker, Cori N., Krishnappa, Veena, Chakraborty, Anutosh, Phinney, Donald G. |
| المساهمون: | National Institutes of Health |
| المصدر: | Stem Cells ; volume 35, issue 8, page 1973-1983 ; ISSN 1066-5099 1549-4918 |
| بيانات النشر: | Oxford University Press (OUP) |
| سنة النشر: | 2017 |
| الوصف: | Mesenchymal stem/stromal cells (MSCs) are the predominant source of bone and adipose tissue in adult bone marrow and play a critical role in skeletal homeostasis. Age-induced changes in bone marrow favor adipogenesis over osteogenesis leading to skeletal involution and increased marrow adiposity so pathways that prevent MSC aging are potential therapeutic targets for treating age-related bone diseases. Here, we show that inositol hexakisphosphate kinase 1 (Ip6k1) deletion in mice increases MSC yields from marrow and enhances cell growth and survival ex vivo. In response to the appropriate stimuli, Ip6k1−/− versus Ip6k1+/+ MSCs also exhibit enhanced osteogenesis and hematopoiesis-supporting activity and reduced adipogenic differentiation. Mechanistic-based studies revealed that Ip6k1−/− MSCs express higher MDM2 and lower p53 protein levels resulting in lower intrinsic mitochondrial reactive oxygen species (ROS) levels as compared to Ip6k1+/+ MSCs, but both populations upregulate mitochondrial ROS to similar extents in response to oxygen-induced stress. Finally, we show that mice fed a high fat diet exhibit reduced trabecular bone volume, and that pharmacological inhibition of IP6K1 using a pan-IP6K inhibitor largely reversed this phenotype while increasing MSC yields from bone marrow. Together, these findings reveal an important role for IP6K1 in regulating MSC fitness and differentiation fate. Unlike therapeutic interventions that target peroxisome proliferator-activated receptor gamma and leptin receptor activity, which yield detrimental side effects including increased fracture risk and altered feeding behavior, respectively, inhibition of IP6K1 maintains insulin sensitivity and prevents obesity while preserving bone integrity. Therefore, IP6K1 inhibitors may represent more effective insulin sensitizers due to their bone sparing properties. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1002/stem.2645 |
| الإتاحة: | https://doi.org/10.1002/stem.2645Test https://academic.oup.com/stmcls/article-pdf/35/8/1973/42603430/stmcls_35_8_1973.pdfTest |
| حقوق: | http://creativecommons.org/licenses/by-nc-nd/4.0Test/ |
| رقم الانضمام: | edsbas.5DF4FD3D |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/stem.2645 |
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