Effects of refined konjac meal (RKM) on the calcium and phosphorus metabolism and bone parameters were observed in rats of both sexes fed with food containing 1% of RKM for 18 months. A comparable group of rats fed on...Effects of refined konjac meal (RKM) on the calcium and phosphorus metabolism and bone parameters were observed in rats of both sexes fed with food containing 1% of RKM for 18 months. A comparable group of rats fed on basic diet only was used as a control.Results obtained indicate that all the measured parameters (serum calcium and phosphorus level, femur weight and its calcium and phesphorus content, and the osteometry of the tibia) showed no significant difference between the experimental and the control groups.Thus there is no adverse effect either on the calcium and phosphorus metabolism or on the bone after a long-term intake at a moderate dosage.展开更多
We assessed genetic and environmental effectson bone development of the hand and wrist, andon key anthropometric measures in Chinese youngtwins. In total, 139 monozygotic and 95 dizygotictwin pairs aged from 5 to 18 y...We assessed genetic and environmental effectson bone development of the hand and wrist, andon key anthropometric measures in Chinese youngtwins. In total, 139 monozygotic and 95 dizygotictwin pairs aged from 5 to 18 years were recruited.The twin correlations of total hand and wrist scoresfor monozygotic （MZ） and dizygotic （DZ） twins were0.71 and 0.36, respectively. Bivariate modelanalysis showed moderate genetic correlations onlyfor total skeletal maturity vs. weight and totalskeletal maturity vs. waist circumference （r, 0.51and 0.46, respectively）. Our findings demonstratedthat genetic factors played important roles in bonedevelopment of the hand and wrist in Chineseyoung twins, and that these genetic effects mightbe distinct from those influencing anthropometricmeasures.展开更多
Objective： To study, at the cytological level, the basic concept of Chinese medicine that “the Kidney （Shen） controls the bone”. Methods： Kaempferol was isolated form Rhizoma Drynariae （Gu Sui Bu, GSB） and at ...Objective： To study, at the cytological level, the basic concept of Chinese medicine that “the Kidney （Shen） controls the bone”. Methods： Kaempferol was isolated form Rhizoma Drynariae （Gu Sui Bu, GSB） and at several concentrations was incubated with opossum kidney （OK） cells, osteoblasts （MC3T3 El） and human fibroblasts （HF） at cell concentrations of 2 x 104/mL. Opossum kidney cell-conditioned culture media with kaempferol at 70 nmol/L （70kaθOKM） and without kaempferol （oOKM） were used to stimulate MC3T3 E1 and HF proliferation. The bone morphological protein receptors I and Ⅱ （BMPR I and Ⅱ） in OK cells were identified by immune-fluorescence staining and Western blot analysis. Results： Kaempferol was found to increase OK cell growth （P〈0.05）, but alone did not promote MC3T3 E1 or HF cell proliferation. However, although OKM by itself increased MC3T3 E1 growth by 198% （P〈0.01）, the 70kaθOKM further increased the growth of these cells by an additional 127% （P〈0.01）. It indicates that the kidney cell generates a previously unknown osteoblast growth factor （OGF） and kaempferol increases kidney cell secretion of OGF. Neither of these media had any significant effect on HF growth. Kaempferol also was found to increase the level of the BMPR Ⅱ in OK cells. Conclusions： This lends strong support to the original idea that the Kidney has a significant influence over bone-formation, as suggested by some long-standing Chinese medical beliefs, kaempferol may also serve to stimulate kidney repair and indirectly stimulate bone formation.展开更多
Background Pharmacologic options for treatment of osteolytic diseases especially in children are limited.Although not licensed for use,denosumab,a fully humanized antibody to RANKL,is used in children with good effect...Background Pharmacologic options for treatment of osteolytic diseases especially in children are limited.Although not licensed for use,denosumab,a fully humanized antibody to RANKL,is used in children with good effects.Among others,one possible indication are giant cell tumors and aneurysmatic bone cysts.However,there are reports of severe hypercalcemia during weeks to months after termination of denosumab,that are rarely seen in adults.Methods We collected data of four patients,aged 6-17 years,who experienced severe hypercalcemia after completion of treatment with denosumab for unresectable giant cell tumors of bone or aneurysmal bone cysts and methods of their treatment.The detailed case information were described.Results One patient was treated with long-term,high-dose steroid therapy,leading to typical Cushing's syndrome.Another patient was restarted on denosumab repeatedly due to relapses of hypercalcemia after every stop.Finally,in two patients,hypercalcemia ceased definitely after treatment with bisphosphonates.However,several applications were necessary to stabilize calcium levels.Conclusions There is a considerable risk of hypercalcemia as an adverse effect after denosumab treatment in children.Therapeutic and,preferably,preventive strategies are needed.Bisphosphonates seem to be an option for both,but effective proceedings still remain to be established.展开更多
文摘Effects of refined konjac meal (RKM) on the calcium and phosphorus metabolism and bone parameters were observed in rats of both sexes fed with food containing 1% of RKM for 18 months. A comparable group of rats fed on basic diet only was used as a control.Results obtained indicate that all the measured parameters (serum calcium and phosphorus level, femur weight and its calcium and phesphorus content, and the osteometry of the tibia) showed no significant difference between the experimental and the control groups.Thus there is no adverse effect either on the calcium and phosphorus metabolism or on the bone after a long-term intake at a moderate dosage.
文摘We assessed genetic and environmental effectson bone development of the hand and wrist, andon key anthropometric measures in Chinese youngtwins. In total, 139 monozygotic and 95 dizygotictwin pairs aged from 5 to 18 years were recruited.The twin correlations of total hand and wrist scoresfor monozygotic （MZ） and dizygotic （DZ） twins were0.71 and 0.36, respectively. Bivariate modelanalysis showed moderate genetic correlations onlyfor total skeletal maturity vs. weight and totalskeletal maturity vs. waist circumference （r, 0.51and 0.46, respectively）. Our findings demonstratedthat genetic factors played important roles in bonedevelopment of the hand and wrist in Chineseyoung twins, and that these genetic effects mightbe distinct from those influencing anthropometricmeasures.
文摘Objective： To study, at the cytological level, the basic concept of Chinese medicine that “the Kidney （Shen） controls the bone”. Methods： Kaempferol was isolated form Rhizoma Drynariae （Gu Sui Bu, GSB） and at several concentrations was incubated with opossum kidney （OK） cells, osteoblasts （MC3T3 El） and human fibroblasts （HF） at cell concentrations of 2 x 104/mL. Opossum kidney cell-conditioned culture media with kaempferol at 70 nmol/L （70kaθOKM） and without kaempferol （oOKM） were used to stimulate MC3T3 E1 and HF proliferation. The bone morphological protein receptors I and Ⅱ （BMPR I and Ⅱ） in OK cells were identified by immune-fluorescence staining and Western blot analysis. Results： Kaempferol was found to increase OK cell growth （P〈0.05）, but alone did not promote MC3T3 E1 or HF cell proliferation. However, although OKM by itself increased MC3T3 E1 growth by 198% （P〈0.01）, the 70kaθOKM further increased the growth of these cells by an additional 127% （P〈0.01）. It indicates that the kidney cell generates a previously unknown osteoblast growth factor （OGF） and kaempferol increases kidney cell secretion of OGF. Neither of these media had any significant effect on HF growth. Kaempferol also was found to increase the level of the BMPR Ⅱ in OK cells. Conclusions： This lends strong support to the original idea that the Kidney has a significant influence over bone-formation, as suggested by some long-standing Chinese medical beliefs, kaempferol may also serve to stimulate kidney repair and indirectly stimulate bone formation.
文摘Background Pharmacologic options for treatment of osteolytic diseases especially in children are limited.Although not licensed for use,denosumab,a fully humanized antibody to RANKL,is used in children with good effects.Among others,one possible indication are giant cell tumors and aneurysmatic bone cysts.However,there are reports of severe hypercalcemia during weeks to months after termination of denosumab,that are rarely seen in adults.Methods We collected data of four patients,aged 6-17 years,who experienced severe hypercalcemia after completion of treatment with denosumab for unresectable giant cell tumors of bone or aneurysmal bone cysts and methods of their treatment.The detailed case information were described.Results One patient was treated with long-term,high-dose steroid therapy,leading to typical Cushing's syndrome.Another patient was restarted on denosumab repeatedly due to relapses of hypercalcemia after every stop.Finally,in two patients,hypercalcemia ceased definitely after treatment with bisphosphonates.However,several applications were necessary to stabilize calcium levels.Conclusions There is a considerable risk of hypercalcemia as an adverse effect after denosumab treatment in children.Therapeutic and,preferably,preventive strategies are needed.Bisphosphonates seem to be an option for both,but effective proceedings still remain to be established.
