Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways

Osteoclasts with elevated bone resorption are commonly present in postmenopausal osteoporosis, and other osteolytic pathologies. Therefore, suppressing osteoclast generation and function has been the main focus of osteoporosis treatment. Betulinic acid (BA) represents a triterpenoid mainly purified...

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Main Authors: Jiyong Wei, Yicheng Li, Qian Liu, Yanni Lan, Chengming Wei, Kun Tian, Liwei Wu, Chunbo Lin, Jiake Xu, Jinmin Zhao, Yuan Yang
Format: Article
Language:English
Published: Frontiers Media S.A. 2020-07-01
Series:Frontiers in Pharmacology
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fphar.2020.01025/full
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author Jiyong Wei
Jiyong Wei
Jiyong Wei
Jiyong Wei
Yicheng Li
Qian Liu
Qian Liu
Yanni Lan
Chengming Wei
Kun Tian
Kun Tian
Kun Tian
Liwei Wu
Liwei Wu
Liwei Wu
Chunbo Lin
Jiake Xu
Jiake Xu
Jinmin Zhao
Jinmin Zhao
Jinmin Zhao
Yuan Yang
Yuan Yang
Yuan Yang
author_facet Jiyong Wei
Jiyong Wei
Jiyong Wei
Jiyong Wei
Yicheng Li
Qian Liu
Qian Liu
Yanni Lan
Chengming Wei
Kun Tian
Kun Tian
Kun Tian
Liwei Wu
Liwei Wu
Liwei Wu
Chunbo Lin
Jiake Xu
Jiake Xu
Jinmin Zhao
Jinmin Zhao
Jinmin Zhao
Yuan Yang
Yuan Yang
Yuan Yang
author_sort Jiyong Wei
collection DOAJ
description Osteoclasts with elevated bone resorption are commonly present in postmenopausal osteoporosis, and other osteolytic pathologies. Therefore, suppressing osteoclast generation and function has been the main focus of osteoporosis treatment. Betulinic acid (BA) represents a triterpenoid mainly purified from the bark of Betulaceae. BA shows multiple biological activities, including antitumor and anti-HIV properties, but its effect on osteolytic conditions is unknown. Here, BA suppressed receptor activator of nuclear factor‐κB ligand (RANKL)‐associated osteoclastogenesis and bone resorptive function, as assessed by tartrate‐resistant acid phosphatase (TRAP) staining, fibrous actin ring generation, and hydroxyapatite resorption assays. Mechanistically, BA downregulated the expression of osteoclastic-specific genes. Western blot analysis revealed that BA significantly interrupted ERK, JNK and p38 MAPK activation as well as intracellular reactive oxygen species (ROS) production, thus altering c-Fos and NFATc1 activation. Corroborating the above findings in cell-based assays, BA prevented ovariectomy-associated bone loss in an animal model. In conclusion, these findings suggest that BA can inhibit osteoclast generation and function as well as the RANKL signaling pathway, and might be used for treating osteoclast-related osteoporosis.
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spelling doaj.art-a04dd9d89fd24ec792619356ed412c782022-12-22T00:27:50ZengFrontiers Media S.A.Frontiers in Pharmacology1663-98122020-07-011110.3389/fphar.2020.01025532112Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 PathwaysJiyong Wei0Jiyong Wei1Jiyong Wei2Jiyong Wei3Yicheng Li4Qian Liu5Qian Liu6Yanni Lan7Chengming Wei8Kun Tian9Kun Tian10Kun Tian11Liwei Wu12Liwei Wu13Liwei Wu14Chunbo Lin15Jiake Xu16Jiake Xu17Jinmin Zhao18Jinmin Zhao19Jinmin Zhao20Yuan Yang21Yuan Yang22Yuan Yang23Research Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaGuangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, ChinaDepartment of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, ChinaDepartment of Orthopedics, The First People’s Hospital of Nanning, Nanning, ChinaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaSchool of Biomedical Sciences, The University of Western Australia, Perth, WA, AustraliaDepartment of Pharmacy, People’s Hospital of Guangxi Zhuang Autonomous Region, Nanning, ChinaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaGuangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, ChinaDepartment of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, ChinaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaGuangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, ChinaDepartment of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, ChinaOrthopaedics, Langdong Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, ChinaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaSchool of Biomedical Sciences, The University of Western Australia, Perth, WA, AustraliaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaGuangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, ChinaDepartment of Orthopaedics Trauma and Hand Surgery, The First Affiliated Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, ChinaResearch Centre for Regenerative Medicine, Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, ChinaGuangxi Collaborative Innovation Center for Biomedicine, Life Sciences Institute, Guangxi Medical University, Nanning, ChinaOrthopaedics, Langdong Hospital of Guangxi Medical University, Guangxi Medical University, Nanning, ChinaOsteoclasts with elevated bone resorption are commonly present in postmenopausal osteoporosis, and other osteolytic pathologies. Therefore, suppressing osteoclast generation and function has been the main focus of osteoporosis treatment. Betulinic acid (BA) represents a triterpenoid mainly purified from the bark of Betulaceae. BA shows multiple biological activities, including antitumor and anti-HIV properties, but its effect on osteolytic conditions is unknown. Here, BA suppressed receptor activator of nuclear factor‐κB ligand (RANKL)‐associated osteoclastogenesis and bone resorptive function, as assessed by tartrate‐resistant acid phosphatase (TRAP) staining, fibrous actin ring generation, and hydroxyapatite resorption assays. Mechanistically, BA downregulated the expression of osteoclastic-specific genes. Western blot analysis revealed that BA significantly interrupted ERK, JNK and p38 MAPK activation as well as intracellular reactive oxygen species (ROS) production, thus altering c-Fos and NFATc1 activation. Corroborating the above findings in cell-based assays, BA prevented ovariectomy-associated bone loss in an animal model. In conclusion, these findings suggest that BA can inhibit osteoclast generation and function as well as the RANKL signaling pathway, and might be used for treating osteoclast-related osteoporosis.https://www.frontiersin.org/article/10.3389/fphar.2020.01025/fullbetulinic acidosteoclastreceptor activator of nuclear factor‐κB ligandosteoporosisMAPK
spellingShingle Jiyong Wei
Jiyong Wei
Jiyong Wei
Jiyong Wei
Yicheng Li
Qian Liu
Qian Liu
Yanni Lan
Chengming Wei
Kun Tian
Kun Tian
Kun Tian
Liwei Wu
Liwei Wu
Liwei Wu
Chunbo Lin
Jiake Xu
Jiake Xu
Jinmin Zhao
Jinmin Zhao
Jinmin Zhao
Yuan Yang
Yuan Yang
Yuan Yang
Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways
Frontiers in Pharmacology
betulinic acid
osteoclast
receptor activator of nuclear factor‐κB ligand
osteoporosis
MAPK
title Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways
title_full Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways
title_fullStr Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways
title_full_unstemmed Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways
title_short Betulinic Acid Protects From Bone Loss in Ovariectomized Mice and Suppresses RANKL-Associated Osteoclastogenesis by Inhibiting the MAPK and NFATc1 Pathways
title_sort betulinic acid protects from bone loss in ovariectomized mice and suppresses rankl associated osteoclastogenesis by inhibiting the mapk and nfatc1 pathways
topic betulinic acid
osteoclast
receptor activator of nuclear factor‐κB ligand
osteoporosis
MAPK
url https://www.frontiersin.org/article/10.3389/fphar.2020.01025/full
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