MRI molecular image probe and its preparing method
A molecular imaging and probe technology, used in the analysis of materials, material analysis through resonance, sensors, etc., can solve the problems of specific instability, increase the complexity of synthesis, poor penetration and permeability, etc., to improve penetration. properties, improve biological performance, and the effect of good use effect
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Embodiment 1
[0039] Embodiment 1, HYNIC and Tricine and the MRI probe of paramagnetic metal Gd
[0040] 1. GdCl 3 Synthesis: take 36.3mg Gd 2 o 3 , add 10ml of 0.1mol / L HCl, and heat to 60°C. Continue to react for 10 minutes until it is completely dissolved, then heat to 100°C to evaporate excess HCl.
[0041] 2. Preparation of chelating agent solution: 3 mg [HYNIC-D-Phe 1 ,Tyr 3 ]-Octreotide (HYNIC-TOC, synthesized by Shanghai Gil Biochemical Company) was dissolved in 8ml 0.2M Na 2 HPO 4 In PH6-7 buffer solution, after fully dissolving, take 20mg Tricine and 50mg mannitol and dissolve them in the above solution, and heat in a water bath for 10 minutes.
[0042] 3. Preparation of MRI probe: take the GdCl synthesized in the first step 3 (3-4 μmol) was added to the above-mentioned chelating agent solution for chelating reaction, shaken and mixed at room temperature, and the product was separated by HPLC to obtain the Gd-Tricine-HYNIC-Octreotide molecular probe.
[0043] The molecul...
Embodiment 2
[0052] Embodiment 2, HYNIC and EDDA and the MRI probe of paramagnetic metal Gd
[0053] 1. GdCl 3 Synthesis: take 36.3mg Gd 2 o 3 , add 10ml of 0.1mol / L HCl, and heat to 60°C. Continue to react for 10 minutes until it is completely dissolved, then heat to 100°C to evaporate excess HCl.
[0054] 2. Prepare chelating agent solution: mix 3mg [HYNIC-D-Phe 1 ,Tyr 3 ]-Octreotide (HYNIC-TOC) dissolved in 8ml 0.2M Na 2 HPO 4 In PH6-7 buffer solution, after fully dissolving, take 40mg EDDA and 50mg mannitol and dissolve them in the above solution, and heat in a water bath for 10 minutes.
[0055] 3. Preparation of MRI probe: take the GdCl synthesized in the first step 3 (3-4 μmol), added to the above-mentioned chelating agent solution for chelating reaction, shaken and mixed at room temperature, and the product was separated by HPLC to obtain Gd-EDDA-HYNIC-Octreotide molecular probe.
[0056] Through animal experiments, it has the same performance as the Gd-Tricine-HYNIC-Octr...
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