Bone Abstracts

Objectives: This study was designed to investigate the prevalence of low bone mass, the influence of amenorrhea on bone mineral density (BMD), and the cause of amenorrhea that provoke the severe low bone mass in premenopausal women.Materials and methods: One hundred and seventy one women diagnosed with amenorrhea in premenopausal women were included in this study. All patients underwent history taking, gynecological examination, and check serum hormone l...

Activation of p38 MAPK by RANKL is regulated by the scaffolding protein receptor for activated C-kinase 1 (RACK1) in osteoclast precursors, whereas it is unclear whether RACK1 can also affect in mature osteoclasts. In this study, to identify that the interaction of RACK1 with c-Src is essential for osteoclast function, we generated several mutants affecting the RACK1-c-Src association. A RACK1 mutant protein (mutations of tyrosine 228 and 246 residues to phenylalanine) disrupt...

The skeleton is a preferred site of metastasis in patients with advanced breast cancer, and bone loss is one of the major complications of breast cancer metastasis. Therefore, prevention of bone metastasis is clinically important. Our previous observation of an anti-osteoclastic activity of Trolox, a vitamin E analogue, led us to investigate whether Trolox could inhibit bone metastasis and bone destruction induced by breast cancer. I.P. administration of Trolox markedly inhibi...

Engulfment adaptor phosphotyrosine-binding (PTB) domain containing 1 (GULP1) is an adaptor protein involved in the engulfment of apoptotic cells via phagocytosis. Although GULP1 is widely expressed in various tissues, including the brain, muscle, testis, and bone, the function of GULP1 has not been well studied. Here, we investigated whether GULP1 plays a role in the regulation of bone remodeling and examined its expression in bone cells. Conditional Gulp1 floxed mice...

The receptor activator of NF-kB (RANK) and ITAM-containing adaptors have been identified as essential factors involved in osteoclast formation and bone remodeling, but their mechanisms and interacting factors have not yet been fully identified. Here we report that early estrogen-induced gene 1 (EEIG1), a novel RANK ligand (RANKL)-inducible protein, physically interacts with RANK and further associates with Gab2, PLCg2, and Tec/Btk kinases by RANKL stimulation. Overexpression o...

Objectives: We investigated bone mineral density (BMD) in women as this is related to a history of previous pregnancies and miscarriage and according to age.Materials and methods: We performed retrospective study on 1043 women who had their BMD in a university hospital. We analyzed the BMD and the previous obstetric history according to age and the clinical characteristics.Results: The mean age of the study subjects was 56.7±5...

Background: In 2004, we reported a 48.1% prevalence of osteoporosis in an Ibansung cohort. The current prospective intervention study was undertaken in order to estimate the prevalence of osteoporosis from 2004 to 2015 and the increasing treatment rate of osteoporosis following osteoporosis screening tests with ultrasound bone densitometry and education in the same cohort.Methods: From November 1, 2014 to August 31, 2015, 960 adults ≥50 years of ag...

Introduction: The purposes of this study were to evaluate the trends in the incidence and mortality of hip fracture between 2008 and 2012, and predict the number of hip fractures in Korea up to 2025, using nationwide claims data.Methods: Nationwide claims data managed by the National Health Insurance Service (NHIS) was used to identify patients with hip fracture. All new visits or admissions to medical institutes for hip fracture aged 50 years or more be...

Introduction: Vertebral fracture has been recognized as a major health concern. Our purposes were to evaluate the trends in the incidence and mortality of vertebral fracture between 2008 and 2012 and predict the number of vertebral fracture that will occur in Korea up to 2025, using nationwide data from the National Health Insurance Service (NHIS).Method: A nationwide data set was evaluated to identify all new visits to medical institutes for vertebral f...

Nutrition is a major modifiable factor that affects bone health. Dietary potassium may act as an alkaline source by neutralizing the acid load and reducing calcium loss from bone.We aimed to evaluate the association between dietary potassium intake and bone mineral density (BMD) in the Korean population. We analyzed data from the Korean National Health and Nutrition Examination Survey (KNHANES) A total of 3135 men aged >50 years and 4052 postmenopaus...