Based on the observation of silicon content decrease in the muscles and serum with aging,this study proposes a silicate bioactive material based therapy for treating sarcopenia.Two therapeutic strategies were designed...Based on the observation of silicon content decrease in the muscles and serum with aging,this study proposes a silicate bioactive material based therapy for treating sarcopenia.Two therapeutic strategies were designed.One utilizes calcium silicate(CS)hydrogel for localized intramuscular treatment,and the other employs CS solution for systemic treatment through Intravenous injection.Both treatments restore silicon levels in the muscles and serum of aging mice,and show therapeutic effects on sarcopenia.Specifically,the CS hydrogel demonstrates more pronounced short-term efficacy in promoting local muscle regeneration,while the CS solution exhibits superior outcomes in modulating the overall condition of aging mice.The fundamental mechanism of the CS treatments on sarcopenia may involve the direct regulation of the SIRTs signaling pathway by silicate ions released from CS,as well as the indirect regulation of SIRTs pathway via the suppression of Sarcolipin(SLN)overexpression by silicate ions.Specifically,silicate ions directly upregulate SIRT1 expression in macrophages and on one side promote NF-kB deacetylation to inhibit M1 polarization,and on the other side facilitate STAT3 deacetylation to inhibit M2 polarization,ultimately reducing the expression of inflammatory factors(TNF-α,IL-6)and fibrotic factors(IL-10,TGF-β).Meanwhile,silicate ions directly upregulate SIRT3 in myoblasts,leading to the promotion of STAT3 dephosphorylation,inhibits mitochondrial reactive oxygen species(ROS)secretion,and enhances the expression of MyoD,MyoG,and Myosin,and accelerates myogenic differentiation.This bioactive CS based therapy provides a new approach for combating sarcopenia.展开更多
The upper part of the Fujia deposit was mined out by open-pit, and the lower part is being mined underground. The level pillar between open-pit and underground mine had a thickness of 24 m, a length of 300 m and a max...The upper part of the Fujia deposit was mined out by open-pit, and the lower part is being mined underground. The level pillar between open-pit and underground mine had a thickness of 24 m, a length of 300 m and a maximum width of 35 in. As the level pillar contained about 5.2 million ton ore of high nickel grade, it was necessary to recover the level pillar. Because of special need of safety, underhand heading cut-and-fill stoping method was used. For the first two layers of heading, the cemented fill materials were a mix of water and high-aluminum-content cement with silicate gelling agent; and for other heading layers, total tailings was added into the fill mix in order to reduce the cement consumption. Finally, the level pillar was recovered successfully.展开更多
基金supported by the National Natural Science Foundation of China(82402963 and 32301096)Yunnan Provincial Major Science and Technology Project(202402AA310058)+1 种基金China Postdoctoral Science Foundation(GZB20230736,2023M733463,2023M743444)The Third People’s Hospital of Chengdu Clinical Research Program(CSY-YN-04-2025-005).
文摘Based on the observation of silicon content decrease in the muscles and serum with aging,this study proposes a silicate bioactive material based therapy for treating sarcopenia.Two therapeutic strategies were designed.One utilizes calcium silicate(CS)hydrogel for localized intramuscular treatment,and the other employs CS solution for systemic treatment through Intravenous injection.Both treatments restore silicon levels in the muscles and serum of aging mice,and show therapeutic effects on sarcopenia.Specifically,the CS hydrogel demonstrates more pronounced short-term efficacy in promoting local muscle regeneration,while the CS solution exhibits superior outcomes in modulating the overall condition of aging mice.The fundamental mechanism of the CS treatments on sarcopenia may involve the direct regulation of the SIRTs signaling pathway by silicate ions released from CS,as well as the indirect regulation of SIRTs pathway via the suppression of Sarcolipin(SLN)overexpression by silicate ions.Specifically,silicate ions directly upregulate SIRT1 expression in macrophages and on one side promote NF-kB deacetylation to inhibit M1 polarization,and on the other side facilitate STAT3 deacetylation to inhibit M2 polarization,ultimately reducing the expression of inflammatory factors(TNF-α,IL-6)and fibrotic factors(IL-10,TGF-β).Meanwhile,silicate ions directly upregulate SIRT3 in myoblasts,leading to the promotion of STAT3 dephosphorylation,inhibits mitochondrial reactive oxygen species(ROS)secretion,and enhances the expression of MyoD,MyoG,and Myosin,and accelerates myogenic differentiation.This bioactive CS based therapy provides a new approach for combating sarcopenia.
文摘The upper part of the Fujia deposit was mined out by open-pit, and the lower part is being mined underground. The level pillar between open-pit and underground mine had a thickness of 24 m, a length of 300 m and a maximum width of 35 in. As the level pillar contained about 5.2 million ton ore of high nickel grade, it was necessary to recover the level pillar. Because of special need of safety, underhand heading cut-and-fill stoping method was used. For the first two layers of heading, the cemented fill materials were a mix of water and high-aluminum-content cement with silicate gelling agent; and for other heading layers, total tailings was added into the fill mix in order to reduce the cement consumption. Finally, the level pillar was recovered successfully.
