Method for analyzing content of A beta plaque developer precursor AV45

A plaque imaging agent and analysis method technology, applied in the direction of analysis materials, measuring devices, material separation, etc., can solve the problems of inability to separate impurities and tailing, and achieve improved separation, increased number of plates, and tailing phenomenon Improved effect

Inactive Publication Date: 2014-03-19
JIANGSU INST OF NUCLEAR MEDICINE
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Problems solved by technology

[0008] The HPLC method reported in the literature adopts acetonitrile:ammonium acetate (85:15) as the mobile phase, and there is a tailing phenomenon in the peak shape, and the peak is wider, and the impurities cannot be effectively separated

Method used

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  • Method for analyzing content of A beta plaque developer precursor AV45
  • Method for analyzing content of A beta plaque developer precursor AV45
  • Method for analyzing content of A beta plaque developer precursor AV45

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Embodiment Construction

[0019] Chromatographic condition optimization:

[0020] Choice of mobile phase

[0021] Using WATERS 600 type high performance liquid chromatography, 2487 ultraviolet detector, chromatographic column Inertsil C18 column, 5μm, 4.6×250mm, use the following mobile phase test respectively

[0022] (1) Acetonitrile-ammonium acetate system

[0023] Using the literature method acetonitrile: ammonium acetate (85:15) system as the mobile phase, the result is a broad peak and tailing phenomenon. The number of theoretical plates is low, 2600 (2, intermediate) and 5200 (1, product), respectively. see picture 1.

[0024] (2) Acetonitrile-dipotassium hydrogen phosphate system

[0025] a: 25mM dipotassium hydrogen phosphate: acetonitrile = 15:85; b: 25mM dipotassium hydrogen phosphate: acetonitrile = 15:85, plus 0.01% triethylamine. See Figure 2.

[0026] (3) Acetonitrile-disodium hydrogen phosphate system,

[0027] a: 25mM disodium hydrogen phosphate: acetonitrile = 15:85; b: 25mM di...

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Abstract

The invention relates to a method for analyzing the content of an A beta plaque developer precursor AV45, belonging to the technical field of apparatus analysis. An 18F-AV45 is capable of identifying an A beta plaque pathological state in the brain of an AD (Alzheimer Disease) patient in vivo, is used for visualized and quantitative research of an amyloid protein deposition process of a human body, and moves towards the clinical. A high-purity precursor AV45 needs to be obtained if a higher radiochemical purity PET (Positron Emission Tomography) developer 18F-AV45 is obtained. According to the method, the chromatography condition is as follows: a WATERS 600 type high performance liquid chromatograph, a 2487 ultraviolet detector, a chromatographic column Inertsil C18 column, 5 micrometers and 4.6*250mm; a flowing phase is as follows: a ratio v / v of 50mM disodium hydrogen phosphate to acetonitrile is 15-85, and 0.01 percent triethylamine is added; the flowing speed is 0.8mL / min; the AV45 sample feeding volume is 10mu L; the column temperature is the room temperature; and the detection wavelength is 325nm. According to the method, phosphate is used as a buffering agent, and the triethylamine is added, so that the trailing phenomenon is improved, and the peak symmetry is better. Compared with a literature method, the method has the advantages that the number of theoretical plates and the separation degree are greatly improved, and all impurities are separated well. Various impurities can be effectively detected by using 325nm detection.

Description

technical field [0001] The invention discloses a method for analyzing the content of the Aβ plaque imaging agent precursor AV45, which belongs to the technical field of instrument analysis. Background technique [0002] With the aging of the society, the elderly population in my country is increasing, and the incidence of Alzheimer's disease (AD) is increasing year by year. At present, there are about 5 million AD patients in China, and it has become a major disease that threatens the quality of life in old age. One, it brings a huge economic burden to society and families, and the future Chinese society will bear enormous pressure and challenges. How to effectively prevent and treat AD diseases and improve the quality of life in old age is an extremely urgent and major issue for scientific researchers. At present, the pathogenesis of AD is not very clear, and β-amyloid protein (β-amyloid protein, Aβ) aggregation is considered to be the main pathological feature of AD. The ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 周杏琴张建康毛师师张荣军
Owner JIANGSU INST OF NUCLEAR MEDICINE
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