99mTc-Methylene diphosphonate （99mTc-MDP） is widely used in clinical settings to detect bone abnormalities. However, the mechanism of 99mTc-MDP uptake in bone is not well elucidated. In this study, we utilized a mou...99mTc-Methylene diphosphonate （99mTc-MDP） is widely used in clinical settings to detect bone abnormalities. However, the mechanism of 99mTc-MDP uptake in bone is not well elucidated. In this study, we utilized a mouse tibia injury model, single-photon emission computed tomography （gamma scintigraphy or SPECT）, ex vivo micro-computed tomography, and histology to monitor 99mTc-MDP uptake in injury sites during skeletal healing. In an ex vivo culture system, calvarial cells were differentiated into osteoblasts with osteogenic medium, pulsed with 99mTc-MDP at different time points, and quantitated for 99mTc-MDP uptake with a gamma counter. We demonstrated that 99mTc-MDP uptake in the injury sites corresponded to osteoblast generation in those sites throughout the healing process. The 99mTc-MDP uptake within the injury sites peaked on day 7 post-injury, while the injury sites were occupied by mature osteoblasts also starting from day 7. ~mTc-MDP uptake started to decrease 14 days post-surgery, when we observed the highest level of bony tissue in the injury sites. We also found that 99mTc-MDP uptake was associated with osteoblast maturation and mineralization in vitro. This study provides direct and biological evidence for 99mTc-MDP uptake in osteoblasts during bone healing in vivo and in vitro.展开更多
To explore the effect of technetium-99 conjugated with methylene diphosphonate ( 99 Tc-MDP) on IgM-RF, IgG-RF and IgA-RF (RFs), 47 cases were selected for study, including 33 patients with rheumatoid arthritis (RA...To explore the effect of technetium-99 conjugated with methylene diphosphonate ( 99 Tc-MDP) on IgM-RF, IgG-RF and IgA-RF (RFs), 47 cases were selected for study, including 33 patients with rheumatoid arthritis (RA) and 15 patients with joint pain/arthritis. After 99 Tc-MDP for drips model being given to the patients by intravenous drip 0.2 g daily for 5 days, the injection A and B models of 99 Tc-MDP were used to the patients by intravenous injection one set daily for 10 days, that was one course of treatment. The next course started after 10 days. Each case used it from 2 to 4 courses of treatment. The RFs in serum were determined by the method of enzyme-linked immunoabsorption assay (ELISA) before and after 2 and 4 courses of treatment. In the patients with RA, the concentrations of IgM-RF were 296.2±108.4 IU/ml, 189.5±92.3 IU/ml and 107.8±72.5 IU/ml; the concentrations of IgG-RF were 325.6±126.2 IU/ml, 209.7±98.2 IU/ml and 160.2±80.8 IU/ml; the concentrations of IgA-RF were 330.4±136.3 IU/ml, 210.7±89.2 IU/ml and 148.8±72.2 IU/ml before and after 2 and 4 courses of treatment, respectively. The concentrations of the above RFs were significantly lower after 2 and 4 courses than those before treatment ( P <0.05 and P <0.01). There was no significant difference in RFs concentrations in the patients with joint pain/arthritis before and after use of 99 Tc-MDP. In the patients with positive RFs before treatment, the RFs concentrations were decreased significantly after 2 and 4 courses of treatment ( P <0.05 and P <0.01). There was no obvious change of RFs concentrations in the patients with negative RFs after treatment of 99 Tc-MDP. It was concluded that 99 Tc-MDP could obviously reduce the abnormally high concentrations of RFs, but not influence the normal RFs, which indicated that 99 Tc-MDP has an important effect on controlling the activities of RA.展开更多
Relapsing polychondritis （RP） is a recurrent disease involving cartilage mainly of the ear,nose, larynx, trachea, and bronchus. The typical manifestations of the disease in the ear and nose can be easily recognized,...Relapsing polychondritis （RP） is a recurrent disease involving cartilage mainly of the ear,nose, larynx, trachea, and bronchus. The typical manifestations of the disease in the ear and nose can be easily recognized, but the symptoms could be ignored or easily confused with those of other diseases when the cartilage of other sites is involved. Thus, it is necessary to develop a new technique for the diagnosis of this disease. Few cases of abnormal accumulation of radioactivity at cartilage shown by ^99mTc methylene diphosphonate （MDP） bone scintigraphy are described in the literature. In this report, we present 4 patients of whom 3 had positive findings on ^99mTc MDP bone scintigraphy with an assessment of ^99mTc MDP bone scintigraphy in the diagnosis of RP.展开更多
基金supported by the Van Andel Research Instituteby a grant to BOW from the NIH/NIAMS (AR053293)
文摘99mTc-Methylene diphosphonate （99mTc-MDP） is widely used in clinical settings to detect bone abnormalities. However, the mechanism of 99mTc-MDP uptake in bone is not well elucidated. In this study, we utilized a mouse tibia injury model, single-photon emission computed tomography （gamma scintigraphy or SPECT）, ex vivo micro-computed tomography, and histology to monitor 99mTc-MDP uptake in injury sites during skeletal healing. In an ex vivo culture system, calvarial cells were differentiated into osteoblasts with osteogenic medium, pulsed with 99mTc-MDP at different time points, and quantitated for 99mTc-MDP uptake with a gamma counter. We demonstrated that 99mTc-MDP uptake in the injury sites corresponded to osteoblast generation in those sites throughout the healing process. The 99mTc-MDP uptake within the injury sites peaked on day 7 post-injury, while the injury sites were occupied by mature osteoblasts also starting from day 7. ~mTc-MDP uptake started to decrease 14 days post-surgery, when we observed the highest level of bony tissue in the injury sites. We also found that 99mTc-MDP uptake was associated with osteoblast maturation and mineralization in vitro. This study provides direct and biological evidence for 99mTc-MDP uptake in osteoblasts during bone healing in vivo and in vitro.
文摘To explore the effect of technetium-99 conjugated with methylene diphosphonate ( 99 Tc-MDP) on IgM-RF, IgG-RF and IgA-RF (RFs), 47 cases were selected for study, including 33 patients with rheumatoid arthritis (RA) and 15 patients with joint pain/arthritis. After 99 Tc-MDP for drips model being given to the patients by intravenous drip 0.2 g daily for 5 days, the injection A and B models of 99 Tc-MDP were used to the patients by intravenous injection one set daily for 10 days, that was one course of treatment. The next course started after 10 days. Each case used it from 2 to 4 courses of treatment. The RFs in serum were determined by the method of enzyme-linked immunoabsorption assay (ELISA) before and after 2 and 4 courses of treatment. In the patients with RA, the concentrations of IgM-RF were 296.2±108.4 IU/ml, 189.5±92.3 IU/ml and 107.8±72.5 IU/ml; the concentrations of IgG-RF were 325.6±126.2 IU/ml, 209.7±98.2 IU/ml and 160.2±80.8 IU/ml; the concentrations of IgA-RF were 330.4±136.3 IU/ml, 210.7±89.2 IU/ml and 148.8±72.2 IU/ml before and after 2 and 4 courses of treatment, respectively. The concentrations of the above RFs were significantly lower after 2 and 4 courses than those before treatment ( P <0.05 and P <0.01). There was no significant difference in RFs concentrations in the patients with joint pain/arthritis before and after use of 99 Tc-MDP. In the patients with positive RFs before treatment, the RFs concentrations were decreased significantly after 2 and 4 courses of treatment ( P <0.05 and P <0.01). There was no obvious change of RFs concentrations in the patients with negative RFs after treatment of 99 Tc-MDP. It was concluded that 99 Tc-MDP could obviously reduce the abnormally high concentrations of RFs, but not influence the normal RFs, which indicated that 99 Tc-MDP has an important effect on controlling the activities of RA.
文摘Relapsing polychondritis （RP） is a recurrent disease involving cartilage mainly of the ear,nose, larynx, trachea, and bronchus. The typical manifestations of the disease in the ear and nose can be easily recognized, but the symptoms could be ignored or easily confused with those of other diseases when the cartilage of other sites is involved. Thus, it is necessary to develop a new technique for the diagnosis of this disease. Few cases of abnormal accumulation of radioactivity at cartilage shown by ^99mTc methylene diphosphonate （MDP） bone scintigraphy are described in the literature. In this report, we present 4 patients of whom 3 had positive findings on ^99mTc MDP bone scintigraphy with an assessment of ^99mTc MDP bone scintigraphy in the diagnosis of RP.
文摘目的核磁共振成像(magnetic reaonance imaging,MRI)能够早期检测鼻咽癌的颅底骨侵犯灶,是治疗前标准检查。而SPECT/CT和CT检测颅底骨侵犯的价值尚不明确。本研究对比分析SPECT/CT和CT对鼻咽癌(nasopharyngeal carcinoma,NPC)颅底骨侵犯(skull base bone involvemen,SBBI)检测能力及临床价值。方法对2014-01-01-2015-12-31玉林市第一人民医院165例NPC初治患者于放疗前同期进行SPECT/CT颅底断层骨显像,鼻咽颅底CT、MRI检查。以MRI结果为标准,采用双盲法对两者检测结果进行比较。根据肿瘤的不同侵犯途径,进一步把颅底骨分斜坡、岩尖,蝶骨体、蝶窦底和翼突、翼板等区域进行统计分析。结果 SPECT/CT和CT检测颅底骨破坏灵敏度分别为96.7%(89/92)和60.9%(56/92),特异度分别为72.6%(53/73)和95.9%(70/73),准确度分别为86.1%(142/165)和76.4%(126/165),Kappa值分别为0.711和0.542。SPECT/CT和CT的AUC值(ROC曲线下面积)分别为0.847和0.784,分别与曲线下面积0.5行Z检验比较,差异有统计学意义,Z=12.43,P<0.001;Z=10.09,P<0.001。在斜坡和岩尖区域,SPECT/CT和CT检测SBBI灵敏度分别为96.7%(88/91)和57.1%(52/91),特异性分别为89.2%(66/74)和100.0%(74/74),准确度值分别为93.3%(154/165)和76.4%(126/165),SPECT/CT和CT检测AUC值分别为0.929和0.786,两者差异有统计学意义,Z=4.425,P<0.001。结论 SPECT/CT和CT能有效地检测鼻咽癌SBBI,在斜坡、岩尖区域,SPECT/CT检测效能优于CT。
