Methods of macromolecular analysis using nanochannel arrays
View Patent ↗Methods of analyzing features such as the physical size of macromolecules or biomarkers along large genomic DNA molecules were disclosed as wen as the devices for carrying out such high throughput analysis in a massively parallel fashion. Methods of fabricating such devices are also disclosed.
1. A method of characterizing a genomic DNA using a nanofluidic device, the method comprising:
providing a sample comprising the genomic DNA;
labeling one or more regions of the genomic DNA comprising a haplotype;
translocating at least a portion of the labeled DNAs through an array of fluidic nanochannel segments disposed substantially parallel to a substrate surface, wherein the fluidic nanochannel segment is capable of containing and elongating at least a portion of the region of the nucleic acid, and wherein the fluidic nanochannel segment has a characteristic cross-sectional dimension of less than about 1000 nm and a length of at least about 10 nm, wherein said translocating comprises introducing the labeled isolated nucleic acid molecules into separate fluidic nanochannel segments each having a cross-sectional diameter of less than about 200 nm so as to at least substantially linearize at least a part of the labeled nucleic acid molecules,
said translocating comprising fluidic flow in a nanoscale environment that precludes turbulence and shear forces, thereby maintaining the genomic DNA intact,
capturing single-molecule signals evolved from the haplotype of the intact genomic DNA; and
ascertaining a structural pattern of the intact genomic DNA based on the captured single-molecule signals.
2. The method of claim 1 , wherein labeling comprises labeling with at least one of a fluorescent label, a magnetic label, or a radioactive label.
3. The method of claim 1 , wherein the labeled isolated nucleic acid molecules are from a single cell.
4. The method of claim 1 , wherein translocating is selected from the group consisting of: a fluid flow, a magnetic field, an electric field, a radioactive field, a mechanical force, an electroosmotic force, an electrophoretic force, an electrokinetic force, a temperature gradient, a pressure gradient, a surface property gradient, a capillary flow, and any combination thereof.
5. The method of claim 1 , wherein the translocating comprises controllably moving at least a portion of the genomic DNA into at least a portion of a fluidic nanochannel segment.
6. The method of claim 1 , wherein the translocating comprises moving at least a portion of the genomic DNA through at least a portion of a fluidic nanochannel segment at a controlled speed and a controlled direction.
7. The method of claim 1 , wherein the signal is generated by a substance selected from the group consisting of: an electron spin resonance molecule, a fluorescent molecule, a chemiluminescent molecule, a radioisotope, an enzyme substrate, a biotin molecule, an avidin molecule, an electrical charged transferring molecule, a semiconductor nanocrystal, a semiconductor nanoparticle, a colloid gold nanocrystal, a ligand, a microbead, a magnetic bead, a paramagnetic particle, a quantum dot, a chromogenic substrate, an affinity molecule, a protein, a peptide, a nucleic acid, a carbohydrate, an antigen, a hapten, an antibody, an antibody fragment, a lipid, and any combination thereof.
8. The method of claim 1 , wherein capturing single-molecule signals evolved from the genomic DNA comprises capturing signals from more than one DNA.
9. The method of claim 8 , wherein said translocating, permits simultaneous viewing of multiple regions of DNAs within the nanofluidic device.