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Rare earth complex doped DNA (deoxyribonucleic acid) crystal for detecting medicine as well as preparation method and application thereof

A technology of complexes and DNA chains, applied in the preparation of sugar derivatives, chemical instruments and methods, sugar derivatives, etc.

Pending Publication Date: 2022-05-27
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The use of rare earth hybrid luminescent DNA crystals to detect drugs has not been reported

Method used

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  • Rare earth complex doped DNA (deoxyribonucleic acid) crystal for detecting medicine as well as preparation method and application thereof
  • Rare earth complex doped DNA (deoxyribonucleic acid) crystal for detecting medicine as well as preparation method and application thereof
  • Rare earth complex doped DNA (deoxyribonucleic acid) crystal for detecting medicine as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] DNA was dissolved in ultrapure water after centrifugation, and a growth plate was used as a vessel for crystal growth, and the crystals were grown by vapor diffusion.

[0037] Mix three small crystal DNA strands (H:I:J) in a ratio of 3:3:1, take the DNA solution in the well, add buffer (sodium cacodylate, MgCl) 2 , NaCl, HEPES (pH=6)), DNA solution:buffer=1:1, 1M NaCl solution was injected around the well, and the best crystal growth was obtained. Each well was sealed with scotch tape, heated in an oil bath and slowly lowered from 60°C to 22°C to anneal the tiles and incubated in the incubator for one day to obtain small crystals.

[0038] Mix the seven large crystal DNA strands (A~G) in the same proportion, take the DNA solution into the well, add buffer, DNA solution:buffer=7:1, when the DNA concentration is small, the crystals are larger and the number is smaller, such as figure 2 a, so the size of the crystal can be adjusted by controlling the concentration of the...

Embodiment 2

[0041] DNA was dissolved in ultrapure water after centrifugation, and a growth plate was used as a vessel for crystal growth, and the crystals were grown by vapor diffusion. Mix three small crystal DNA strands (H:I:J) in a ratio of 3:3:1, take the DNA solution in the well, add buffer (sodium cacodylate, MgCl) 2 , NaCl, HEPES (pH=6)), DNA solution:buffer=1:1, 1M NaCl solution was injected around the well, and the best crystal growth was obtained. Each well was sealed with scotch tape, heated in an oil bath and slowly lowered from 60°C to 22°C to anneal the tiles and incubated in the incubator for one day to obtain small crystals.

[0042]Mix the seven large crystal DNA strands (A~G) in the same proportion, take the DNA solution into the well, add buffer, DNA solution: buffer = 28:1, when the concentration of DNA solution is too large, the crystal nucleation is too fast, and the crystal It is too late to grow completely, and the obtained crystals are smaller and more numerous, ...

Embodiment 3

[0045] DNA was dissolved in ultrapure water after centrifugation, and a growth plate was used as a container for crystal growth, and the crystals were grown by vapor diffusion.

[0046] Step (1), mix three small crystal DNA strands (H:I:J) in a ratio of 3:3:1, take the DNA solution in the well, add buffer (sodium cacodylate, MgCl) 2 , NaCl, HEPES (pH=6)), DNA solution:buffer=1:1, 1M NaCl solution was injected around the well, and the best crystal growth was obtained. Each well was sealed with scotch tape, heated in an oil bath and slowly lowered from 60°C to 22°C to anneal the tiles and incubated in the incubator for one day to obtain small crystals.

[0047] Step (2), mix the seven large crystal DNA strands (A~G) in the same proportion, take the DNA solution into the well, add buffer, DNA solution:buffer=14:1, inject NaCl solution around the well, transparent Tape to seal, heat slowly from 90°C to 22°C to anneal the tiles, and incubate in the incubator for three days to obta...

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Abstract

The invention discloses a rare earth complex doped DNA crystal for detecting drugs and a preparation method and application thereof, and the preparation method comprises the following steps: (1) self-assembling different DNA chains to obtain a DNA large crystal, and carrying out cross-linking among the DNA chains to obtain a stable cross-linked DNA large crystal; and (2) loading lanthanide ion complexes on the cross-linked DNA large crystals step by step: fishing out the cross-linked DNA large crystals with good morphology by using a crystal fishing needle, transferring the large crystals into a buffer solution for washing, transferring the large crystals into a 1-100mM lanthanide ion solution, fishing out the crystals after 10-60 minutes, washing, transferring the crystals into a 1-100mM ligand solution, transferring the crystals into the buffer solution after 3-15 minutes, keeping the morphology, washing, transferring the washed crystals into a 1-100mM lanthanide ion solution, and drying to obtain the lanthanide ion complexes. The rare earth complex hybrid luminous DNA crystal is obtained. The prepared luminous DNA crystal, which is a special material, has different fluorescence properties in a drug environment, so that drug release and drug distribution can be monitored.

Description

technical field [0001] The invention relates to the field of nanometer functional materials, in particular to a rare earth complex doped DNA crystal for drug detection and a preparation method and application thereof. Background technique [0002] DNA is a very useful molecular program for self-assembly of three-dimensional nanoscale structures with high programming ability typical of Watson-Crick base pairing and can facilitate crystallisation through immobilized Holliday junctions and cohesion of sticky ends Assembly in 3D space. DNA self-assembled nanostructures, characterized by modularity, structural programmability, spatial addressability, and higher-order self-assembly capabilities, are suitable scaffolds for organizing nanoparticles, e.g., their programmable properties (such as attachment sites, porosity, The advantages of lattice geometry) can be designed to conform to the shape, volume and surface characteristics of the target, and are used in various research fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H23/00C07H1/00C09K11/06G01N21/64
CPCC07H23/00C07H1/00C09K11/06G01N21/643G01N2021/6432G01N2021/6441C09K2211/182
Inventor 唐建国修丹王瑶沈文飞王薇李振华王彦欣赵思博斯诺
Owner QINGDAO UNIV