在腺因诱导的CKD中,长期的二次性甲状腺功能过高会导致骨变化,与骨对PTH的低反应性相一致
Corinne E Metzger1, Landon Y Tak1, Samantha Scholz2
1Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, Indiana, United States of America.
PloS one
|May 23, 2025
概括
在慢性病-矿物质骨疾病 (CKD-MBD) 中,长期高甲状腺激素 (PTH) 信号在小鼠中导致骨反应能力降低. 这表明PTH可能无法可靠地预测晚期CKD的骨健康.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學專業.
- 内分泌学 在内分泌学.
- 骨生物学 骨生物学 骨生物学
背景情况:
- 由高副甲状腺激素 (PTH) 驱动的二次性副甲状腺症与慢性病-矿物质骨疾病 (CKD-MBD) 中的骨质恶化有关.
- 临床数据表明,CKD患者对PTH的骨反应减弱,这种现象称为低反应性,其潜在机制尚不清楚.
研究的目的:
- 在CKD小鼠模型中研究PTH升高对骨健康和PTH受体信号的长期影响.
- 为了确定长时间的PTH升高是否会导致骨细胞反应的改变.
主要方法:
- 在12周和21周评估的雄性C57BL/6J小鼠中确立了氨酸诱导的CKD (Ad).
- 测量了血清尿素 (BUN) 和PTH水平.
- 评估了骨形成的速度.
- 免疫组织化学用于评估骨细胞中的PTH受体1 (PTHR1) 和RANKL表达.
主要成果:
- 患有CKD的小鼠随着时间的推移表现出升高的BUN和增加的PTH水平 (21周Ad与12周Ad).
- 尽管PTH较高,但21周CKD组的骨形成率下降.
- 骨细胞在21周的CKD组中显示了PTHR1和RANKL的减少表达,与12周的组相比.
- 在12周观察到的PTH和PTHR1/RANKL之间的正相关性在21周失去了.
结论:
- 在腺因诱导的CKD小鼠中,长期升高的PTH会导致骨反应能力下降,特别是在骨细胞中.
- 这项研究强调了PTH水平与晚期CKD中骨结果的潜在脱.
- 研究结果表明,PTH可能不是可靠的替代标记在CKD骨健康,并强调需要进一步研究时间依赖的PTH-骨关系.
相关概念视频
01:24Chronic Kidney Disease II: Clinical Manifestations
110
Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
110
00:59The Parathyroid Glands
2.6K
The two pairs of parathyroid glands embedded within the posterior surface of the thyroid gland are restricted by a dense capsule around them. These glands comprise two distinct cell populations—parathyroid oxyphil and parathyroid principal cells- pivotal in calcium homeostasis.
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by...
Oxyphil cells, whose functions remain elusive, emerge during late puberty, adding a layer of complexity to the parathyroid gland's intricacies. In contrast, principal parathyroid cells undertake a vital role by...
2.6K
01:17Hormones and Bone Tissue
3.0K
The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
3.0K
01:21Skeleton and Calcium Homeostasis
4.8K
Calcium is not only the most abundant mineral in bone but also the most abundant mineral in the human body. Calcium ions are needed for bone mineralization, tooth health, heart rate regulation and strength of contraction, blood coagulation, the contraction of smooth and skeletal muscle cells, and the regulation of nerve impulse conduction. The average calcium level in the blood is about 10 mg/dL. When the body cannot maintain this level, a person will experience hypo or hypercalcemia.
4.8K
01:25Chronic Kidney Disease I: Introduction
84
Chronic Kidney Disease (CKD) arises when the kidneys progressively lose their ability to function, ultimately leading to end-stage renal disease. At this advanced stage, the kidneys can no longer filter waste or maintain essential body functions, requiring renal replacement therapy (RRT) through dialysis or a kidney transplant for survival.Early-stage chronic kidney disease and detection challengesIn CKD's early stages, symptoms often remain absent because healthy nephrons compensate for...
84
01:29Bone Disorders
4.0K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
4.0K