Mannose-binding dietary lectins induce adipogenic differentiation of the marrow-derived mesenchymal cells via an active insulin-like signaling mechanism
| Autor: | Lalita Limaye, Avadhesha Surolia, Rajesh Kumar Gupta, Ashwini Hinge, Manmohan S. Bajaj, Vaijayanti Kale |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
MAPK/ERK pathway
Transcription Genetic Bone Marrow Cells Glycerolphosphate Dehydrogenase Fatty Acid-Binding Proteins Biochemistry Mice 3T3-L1 Cells Animals Humans Insulin PPAR alpha Extracellular Signal-Regulated MAP Kinases Garlic Protein kinase A Protein kinase B Tissue homeostasis Adipogenesis biology Kinase Mannose binding Cell Differentiation Mesenchymal Stem Cells Musa MAP Kinase Kinase Kinases Antigens Differentiation Up-Regulation Cell biology PPAR gamma Insulin receptor CCAAT-Enhancer-Binding Proteins biology.protein Plant Lectins Signal Transduction |
| Zdroj: | Glycobiology. 21:521-529 |
| ISSN: | 1460-2423 0959-6658 |
| DOI: | 10.1093/glycob/cwq194 |
| Popis: | We have recently demonstrated that the mannose-binding lectins, namely banana lectin (BL) and garlic lectin (GL), interacted with the insulin receptors on M210B4 cells--an established mesenchymal cell line of murine marrow origin--and initiate mitogen-activated protein kinase kinase (MEK)-dependent extracellular signal-regulated kinase (ERK) signaling in them. In this study, we show that this lectin-mediated active ERK signaling culminates into an adipogenic differentiation of these cells. Gene expression studies indicate that the effect takes place at the transcriptional level. Experiments carried out with pharmacological inhibitors show that MEK-dependent ERK and phosphatidylinositol 3-kinase-dependent AKT pathways are positive regulators of the lectin- and insulin-mediated adipogenic differentiation, while stress-activated kinase/c-jun N-terminal kinase pathway acts as a negative one. Since both lectins could efficiently substitute for insulin in the standard adipogenic induction medium, they may perhaps serve as molecular tools to study the mechanistic aspects of the adipogenic process that are independent of cell proliferation. Our study clearly demonstrates the ability of BL and GL to activate insulin-like signaling in the mesenchymal cells in vitro leading to their adipocytic differentiation. The dietary origin of these lectins underscores an urgent need to examine their in vivo effects on tissue homeostasis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|