Related Experiment Video
Updated: Jun 19, 2026
06:18
An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause
Published on: August 13, 2019
Osteoarthritis associated with estrogen deficiency
Jorge A Roman-Blas1, Santos Castañeda, Raquel Largo
1Bone and Joint Research Unit, Service of Rheumatology, Fundación Jiménez Díaz, Universidad Autónoma, Madrid 28040, Spain. Jorge.Roman-Blas@jefferson.edu
Arthritis Research & Therapy
|October 7, 2009
Summary
Estrogen deficiency impacts osteoarthritis (OA) development and progression. Understanding estrogen
Area of Science:
- Orthopedics and Rheumatology
- Endocrinology
- Molecular Biology
Background:
- Osteoarthritis (OA) is a degenerative joint disease affecting all articular tissues, potentially leading to joint failure.
- Articular tissues were historically considered unresponsive to estrogens, but emerging evidence highlights complex molecular pathways influenced by estrogen.
- The role of estrogen deficiency in OA pathogenesis and its link to osteoporosis are increasingly recognized.
Purpose of the Study:
- To elucidate the intricate molecular mechanisms by which estrogens influence joint tissues in the context of osteoarthritis.
- To investigate the specific effects of estrogen deficiency on articular tissues during OA development and progression.
- To explore the relationship between osteoarthritis and osteoporosis, particularly concerning estrogen's role.
Main Methods:
- Review of current scientific literature on estrogen's effects on articular tissues.
- Analysis of molecular pathways involved in estrogen signaling within joint tissues.
- Examination of clinical data regarding estrogen replacement therapy and selective estrogen receptor modulators in OA management.
Main Results:
- Estrogens exert significant influence on joint tissues through complex, multi-level molecular pathways.
- Estrogen deficiency plays a role in OA development, progression, and its association with osteoporosis.
- Current therapeutic strategies like estrogen replacement and SERMs show variable effectiveness in OA.
Conclusions:
- A comprehensive understanding of estrogen's action on joints and other tissues in OA is crucial.
- Further research is needed to develop targeted and safe estrogen ligands for OA treatment.
- Novel therapeutic agents focusing on the entire OA joint organ system hold promise for managing osteoarthritis.
Related Concept Videos
01:28Menopause
Menopause, a natural biological process marking the end of a woman's fertility, typically occurs between the fifth and sixth decade of life. This phase is characterized by the exhaustion of the ovarian follicle pool, leading to less responsive ovaries despite the high levels of Follicle Stimulating Hormone (FSH) and Luteinizing Hormone (LH). The consequential decrease in estrogen production results in symptoms like hot flashes, heavy sweating, headaches, hair loss, muscle pains, vaginal...
01:29Bone Disorders
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...
02:07Oogenesis
In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
01:24Disorders of the Female Reproductive System
The female reproductive system can be affected by several disorders, including Premenstrual Syndrome (PMS), Premenstrual Dysphoric Disorder (PMDD), endometriosis, and various forms of cancer. PMS and PMDD are cyclical conditions that cause physical and emotional distress, with symptoms that include edema, mood swings, and food cravings. PMDD is a more severe form of PMS characterized by increased symptom severity that peaks during the luteal phase and tends to improve or resolve shortly after...
01:40Bone Remodeling
Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
01:22Hormonal Regulation of the Menstrual Cycle
The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.