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US 2026/0259127 A1Published application
Method and marker for analyzing a sample
OwnerSoeren ALSHEIMERinventor
Life of this patent
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Abstract
A linker is provided. The linker is configured to bind to an affinity reagent. The linker includes at least one binding site configured to bind at least one dye. The linker further includes an oligonucleotide attachment portion. The oligonucleotide attachment portion is configured to bind to an oligonucleotide barcode of the affinity reagent.
Claims23
1-37. (canceled)
38:
- A linker, configured to bind to an affinity reagent, the linker comprising:
- at least one binding site configured to bind at least one dye;
- and
- an oligonucleotide attachment portion configured to bind to an oligonucleotide barcode of the affinity reagent.
1 more element
39:
- The linker according to claim 38, comprising:
- a plurality of binding sites, wherein at least two of the plurality of binding sites are configured to bind to dyes having different characteristics for at least one of:
- excitation or emission.
40:
- A reporter, comprising:
- a linker according to claim 38;
- and
- the at least one dye bound to the at least one binding site of the linker.
1 more element
41:
- A reporter, comprising:
- a linker according to claim 39;
- and
- a combination of dyes, each respective dye bound to a respective one of the plurality of binding sites of the linker, wherein at least two of the combination of dyes have different characteristics for at least one of:
- excitation or emission.
2 more elements
42:
- A marker, comprising:
- a reporter according to claim 40;
- and
- the affinity reagent attach to an analyte, wherein the reporter is attached to the affinity reagent.
1 more element
43:
- The marker according to claim 42, wherein the oligonucleotide attachment portion of the linker is fully or partially complementary to the oligonucleotide barcode of the affinity reagent.
44:
- The marker according to claim 42, wherein the oligonucleotide attachment portion of the linker is configured to have an affinity to the oligonucleotide barcode of the affinity reagent so as to bind transiently under at least one condition before dissociating again from the oligonucleotide barcode,
- wherein the at least one condition provides for dissociation of the oligonucleotide attachment portion depending on at least one of host-guest mediated ligand-invasion, strand displacement, or photochemical control of hybridization.
45:
- The marker according to claim 42, wherein one of the oligonucleotide attachment portion of the linker and the oligonucleotide barcode of the affinity reagent comprises at least one guest molecule attached to a first nucleobase thereof and configured to complexate with a host molecule, and
- wherein the other of the oligonucleotide attachment portion of the linker and the oligonucleotide barcode of the affinity reagent comprises at least one nucleobase complementary to the first nucleobase to which the guest molecule is attached.
46:
- The marker according to claim 45, wherein the host molecule is a cucurbituril.
47:
- The marker according to claim 42, comprising at least one base mismatch between the oligonucleotide attachment portion of the linker and the oligonucleotide barcode of the affinity reagent hindering stable association therebetween,
- wherein the at least one base mismatch is configured to be bridged by photoswitching.
48:
- The marker according to claim 47, wherein the at least one base mismatch is a GG mismatch, which is configured to be bridged by photoswitching trans-NCDA to cis-NCDA.
49:
- The marker according to claim 42, wherein the affinity reagent is an oligonucleotide-probe which is configured to bind to a nucleic acid analyte.
50:
- The marker according to claim 42, wherein each of the oligonucleotide attachment portion of the linker and the oligonucleotide barcode of the affinity reagent has a length of 9 to 13 nucleotides.
51:
- A plurality of markers according to claim 42, wherein each respective reporter comprises a respective unique combination of dyes, and wherein each respective reporter is attached to a respective affinity reagent configured for attachment to an analyte, such that no unique combination of dyes is associated with more than one affinity reagent.
52:
- A method for analyzing a sample, the sample comprising:
- a plurality of affinity reagents, each respective affinity reagent being configured to attach to a respective analyte, at least one of the plurality of affinity reagents being attached to an analyte;
- and
- a first plurality of combinations of dyes, each respective combination of dyes being unique among the first plurality of combinations of dyes, and each respective combination of dyes comprising at least two dyes having different characteristics for at least one of excitation or emission,
- wherein at least one of the first plurality of combinations of dyes is attached to an associated affinity reagent according to a first mapping,
- wherein at least another one of the first plurality of combinations of dyes is attached to the associated affinity reagent according to a second mapping,
- wherein the first mapping is different from the second mapping,
- the method comprising, for the first mapping and for the second mapping in a time sequential manner:
- i) directing excitation light at the sample, the excitation light having characteristics for exciting the at least two dyes having different characteristics for at least one of:
- excitation or emission;
- and
- ii) generating at least one first readout from emission light emitted by the at least two dyes excited by excitation light.
9 more elements
53:
- A method for analyzing a sample, the sample comprising:
- a plurality of affinity reagents, each respective affinity reagent being configured to attach to a respective analyte, at least one of the plurality of affinity reagents being attached to an analyte;
- and
- a first plurality of combinations of dyes, each combination of dyes of the first plurality of combinations of dyes being unique among the first plurality of combinations of dyes and comprising at least two dyes having different characteristics for at least one of:
- excitation or emission,
- a second plurality of combinations of dyes, each combination of dyes of the second plurality of combination of dyes being unique among the second plurality of combinations of dyes and comprising at least two dyes having different characteristics for at least one of excitation or emission,
- wherein the second plurality of combinations of dyes is different from the first plurality of combinations of dyes,
- wherein at least one of the first plurality of combinations of dyes is attached to an associated affinity reagent according to a first mapping,
- wherein at least one of the second plurality of combinations of dyes is attached to the associated affinity reagent according to a second mapping,
- wherein the first mapping is different from the second mapping,
- the method comprising, for the first mapping and for the second mapping in a time sequential manner:
- i) directing excitation light at the sample, the excitation light having characteristics for exciting the at least two dyes having different characteristics for at least one of:
- excitation or emission;
- and
- ii) generating at least one first readout from emission light emitted by the at least two dyes excited by the excitation light.
12 more elements
54:
- The method according to claim 52, wherein each combination of dyes of the first plurality of combinations of dyes is attached to only one affinity reagent, such that no combination of dyes is associated with more than one affinity reagent in the first mapping.
55:
- The method according to claim 52, further comprising at least one of deactivating at least one dye in the first plurality of combinations of dyes;
- removing an attachment between at least one affinity reagent and at least one of the first plurality of combinations of dyes;
- removing an attachment between at least one affinity reagent and at least one of the analytes;
- or
- waiting longer than a fluorescence lifetime of at least one dye in the first plurality of combinations of dyes, and repeating steps i) and ii) for the first plurality of combinations of dyes according to the second mapping.
2 more elements
56:
- The method according to claim 52, wherein the at least another one of the first plurality of combinations of dyes is stochastically attached to the associated affinity reagent according to the second mapping, and wherein stochastic labeling is achieved by at least one of DNA-PAINT, DNA-Exchange, Exchange-PAINT, or by using oligonucleotide barcodes attached to the affinity reagents and complementary attachment oligonucleotide portions attached to the first plurality of combinations of dyes, which are configured to allow repeated association and dissociation of the first plurality of combinations of dyes and the affinity reagents by at least one of the following:
- a change of concentration of a host molecule;
- a change of temperature;
- a change of illumination condition;
- a change in a concentration of at least one capture strand;
- or
- a change in a concentration and/or activity of an enzyme.
4 more elements
57:
- The method according to claim 52, further comprising:
- generating a second readout from the emission light;
- and
- determining, by at least one computer processor, at least a first affinity reagent present in the sample, by:
- comparing the at least one first readout and the second readout;
- and
- determining a presence of the first affinity reagent based, at least in part, on the comparison.
4 more elements
58:
- A solution comprising a linker according to claim 38.
59:
- A lyophilized solid comprising a linker according to claim 38.