Cladded nuclide labeled protein microsphere, preparation method and applications thereof
A technology for labeling proteins and microspheres, which is applied in the field of encapsulated nuclide-labeled protein microspheres, can solve the problems of radionuclide off-labeling, no chitosan/sodium alginate wrapping, etc., to reduce off-labeling and clinical use Safe, prolonging the effect of degradation time
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Embodiment 1
[0048] The preparation method of embodiment 1 microsphere of the present invention
[0049] 1. Raw materials:
[0050] Na 131 I, Na 125 I (sodium iodide)
[0051] Medical type B gelatin: Sigma type A gelatin 50g microspheres are prepared by the modified emulsification condensation method. Bottled after chloramine-T labeling
[0052] Marked with Na 131 I is 2mCi, that is 2ul; use Na 125 I is 4mCi, that is, 4ul; use gelatin microspheres 0.8g; use sodium alginate is 0.3g; use chitosan is 0.3g. Therefore, the ratio of the components of the encapsulating nuclide microspheres in this test is: 0.002:0.004:0.8:0.3:0.3.
[0053] where Na 131 I, Na 125 The specific radioactive concentration of I is: 37GBq / ml.
[0054] The specific preparation method is:
[0055] 1. Microsphere Fabrication
[0056] Prepared by improved emulsification condensation method. Take 80ml of liquid paraffin, add 0.8ml of Span-80, put it into a round bottom flask, and place it in a water bath at 55°C...
Embodiment 2
[0076] Embodiment 2 Energy peak determination of double-labeled microspheres of the present invention
[0077] The non-coated microspheres prepared in step 2 of Example 1 were labeled with energy peaks, and the specific results were as follows, wherein the labeled microspheres were washed 4 times with normal saline, and after each cleaning, the 131 I and 125 I activity is measured, and concrete assay method and result are as follows:
[0079] When using the CRC-15R medical activity meter of American CAPINTEC.INC company to measure mixed markers, select 131 I channel measurement 131 When the radioactivity of I 125 I would interfere, too, by choosing 125 I channel measurement 125 When the radioactivity of I 131 I will also cause interference. Therefore, the measured value of the CRC-15R medical activity meter of the American CAPINTEC. 131 I and 125 I activities, and restore the measured values to their actual activities.
[0080] method:...
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