Related Experiment Video
Updated: Aug 25, 2026

Studies on the Anti-Inflammatory Effect of Xiaoyao Pills in The Treatment of Postmenopausal Osteoporosis in Mice
Published on: August 23, 2024
[Preventing of postmenopausal osteoporosis by hormone replacement therapy? Is the risk acceptable?]
1Département de gynécologie et obstétrique, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne.
Abstract:
Over the past two decades, multiple observational studies have suggested that hormone replacement therapy (HRT) reduced the risk of fracture, increased the quality of life and protected against the cardiovascular disease. HRT was often recommended, on the basis of this evidence, for that indications. But these recommendations were based entirely on observational evidence, which can sometimes be misleading. In the early 1990, several large randomized studies were initiated. The largest of these trials, the Women Health Initiative (WHI) was stopped prematurely last summer (only the group with estrogen plus progestin) because the disadvantages outweighted the advantages of treatment. The conclusions of that study were largely debated in the press and destabilised more than one patient or doctor. The Swiss menopausal society published some directive to precise the indications of HRT.
Related Concept Videos
Bone Remodeling
Bone Disorders
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...
Menopause
Hormones and Bone Tissue
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...
Hormonal Control of the Ovarian Cycle
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Role of Vitamins in Maintaining Bone Health
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
