Hana Yamamoto, Nanami Shimomura and Yasushi Hasegawa
College of Environmental Technology, Muroran Institute of Technology, 27-1 Mizumoto, Muroran 050-8585, Japan; 22041089@mmm.muroran-it.ac.jp (H.Y.); mikurio-gongon714826@docomo.ne.jp (N.S.)
* Correspondence: hasegawa@mmm.muroran-it.ac.jp; Tel.: +81-143-46-5745
Abstract: Pearl oysters have been extensively utilized in pearl production; however, most pearl oyster shells are discarded as industrial waste. In a previous study, we demonstrated that the intraperitoneal administration of pearl oyster shell-derived nacre extract (NE) prevented d-galactose-induced brain and skin aging. In this study, we examined the anti-aging effects of orally administered NE in senescence-accelerated mice (SAMP8). Feeding SAMP8 mice NE prevented the development of aging-related characteristics, such as coarse and dull hair, which are commonly observed in aged mice. Additionally, the NE mitigated muscle aging in SAMP8 mice, such as a decline in grip strength. Histological analysis of skeletal muscle revealed that the NE suppressed the expression of aging markers, cyclin-dependent kinase inhibitor 2A (p16) and cyclin-dependent kinase inhibitor 1 (p21), and increased the expression of sirtuin1 and peroxisome proliferator-activated receptor gamma coactivator 1 (PGC1)- α, which are involved in muscle synthesis. These findings suggest that the oral administration of NE suppresses skeletal muscle aging. Moreover, NE administration suppressed skin aging, including a decline in water content. Interestingly, oral administration of NE significantly extended the lifespan of SAMP8 mice, suggesting that its effectiveness as an anti-aging agent of various tissues including skeletal muscle, skin, and adipose tissue.
Keywords: skeletal muscle aging; nacre extract; lifespan extension; sarcopenia; skin aging
Citation: Yamamoto, H.; Shimomura,
N.; Hasegawa, Y. Oral Administration
of Nacre Extract from Pearl Oyster
Shells Has Anti-Aging Effects on Skin
and Muscle, and Extends the Lifespan
in SAMP8 Mice. Pharmaceuticals 2024,
17, 713. https://doi.org/
10.3390/ph17060713
Academic Editors: Mariia Shanaida,
Geir Bjørklund and Olha
Mykhailenko
Received: 16 May 2024
Revised: 28 May 2024
Accepted: 29 May 2024
Published: 31 May 2024
This article is excerpted from the Nutrients 2024, 16, 2810 by Wound World.
原创： 十六点五 中山二院糖尿病足中心
这是一个我们在《糖尿病足切开设计（1）》中提到过，这次从不同角度谈谈足趾的保全。
大趾是足部最重要的结构，如果被切除，对足部的功能会有比较大的影响，因此，应该尽可能的保存。
感染的足趾是比较常见的一种糖尿病足表现形式，能否保全足趾是一个比较有技巧的工作，现举例说明
原创： 胡海涛 负压引流与创面修复
刚毕业那会经常遇到感染性伤口和压疮患者，能做的就是勤快换药，幻想有一种伤口持续吸引多好，就可以解决每天换药的问题，也可以减轻患者的疼痛——当时还不知道有封闭式负压引流这个技术！
原创： 胡大夫 负压引流与创面修复
伤口世界平台生态圈，以“关爱人间所有伤口患者”为愿景，连接、整合和拓展线上和线下的管理慢性伤口的资源，倡导远程、就近和居家管理慢性伤口，解决伤口专家的碎片化时间的价值创造、诊疗经验的裂变复制、和患者的就近、居家和低成本管理慢性伤口的问题。
2019广东省医疗行业协会伤口管理分会年会
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