Molecular indicia of cellular constituents and resolving the same by super-resolution technologies in single cells
Methods and systems are provided for creating molecular barcodes or indicia for cellular constituents within single cells and for resolving such barcodes or indicia with super resolution technologies such as super resolution microscopy. By this approach, numerous molecular species that can be measured simultaneously in single cells. It has been demonstrated that multiple mRNA transcripts can be labeled with a spatially ordered sequence of fluorophores, and that barcode can be resolved. The methods and systems can be used for genome-wide transcriptional profiling in individual cells by super-resolution barcoding and suggest a general strategy to bring large-scale-omics approach into single cells.
1. A method for detecting a single molecule of an mRNA species of interest in a single cell, comprising:
(i) creating a molecular barcode for the single molecule of the mRNA species of interest in the single cell, comprising:
(a) providing a plurality of different labeled probe-pairs that are specific to a single molecule of the mRNA species of interest in the single cell, wherein the probes in each probe pair of the probe-pairs comprise a nucleic acid probe labeled with a photoswitchable fluorophore and a nucleic acid probe labeled with an activator fluorophore of the photoswitchable fluorophore, wherein the photoswitchable fluorophore can be cycled between a fluorescent state and a dark state and the activator fluorophore is capable of facilitating photo-activation of the photoswitchable fluorophore at a specific wavelength, and wherein each probe in each probe pair of the probe-pairs specifically hybridizes to a different location of the mRNA species of interest, and the photoswitchable fluorophore and the activator fluorophore in each probe pair of the probe-pairs are different such that each probe pair of the probe-pairs can generate a different fluorescent signal with a different color or with a different fluorescent intensity, and
(b) hybridizing the mRNA species of interest within the single cell with said plurality of different labeled different probe-pairs, thereby forming a complex comprising the mRNA species of interest and said plurality of different labeled probe-pairs such that the photoswitchable fluorophore and activator fluorophore of each probe pair of the probe-pairs on the complex are in sufficiently close proximity to each other, and two or more different fluorescent signals with different colors or with different fluorescent intensities are formed along the sequence of the mRNA species of interest on the complex in a spatially ordered fashion and a pattern of fluorescent signals is formed on the complex, wherein the molecular barcode is the pattern of fluorescent signals formed on the complex; and
(ii) resolving said molecular barcode by utilizing stochastic optical reconstruction microscopy (STORM)and detecting the single molecule of the mRNA species of interest in the single cell based on analyzing said molecular barcode.
2. The method of claim 1 , wherein said cell is essentially intact or undisrupted.
3. The method of claim 1 , wherein said cell is a prokaryotic cell or a eukaryotic cell.
4. The method of claim 1 , wherein said single cell is selected from the group consisting of a bacterium, an archaea, a protist, a fungus, a plant cell, an animal cell, a mammalian cell, a mouse cell, a human cell, a cancer cell, a blood cell, a lymphocyte, an erythrocyte, a white blood cell, an epithelial cell, a pituitary cell, a gut or respiratory tract cell, a gland cell, a thyroid gland cell, a parathyroid gland cell, a adrenal gland cell, a muscle cell, a ciliated cell, an embryonic cell, a sensory transducer cell, a neuron, a glial cell, a lens cell, a kidney cell, a pigment cell, and a pancreatic cell.
5. The method of claim 1 , wherein said plurality of probes comprises oligonucleotides.
6. The method of claim 1 , wherein the photoswitchable fluorophore or the activator fluorophore is selected from the group consisting of fluorescein, rhodamine, Alexa Fluors, Dy Light fluors, ATTO Dyes, and analogs or derivatives thereof.
7. The method of claim 1 , wherein the photoswitchable fluorophore or the activator fluorophore is selected from the group consisting of fluorescein and chemical derivatives thereof, Eosin, Carboxyfluorescein, Fluorescein isothiocyanate (FITC), Fluorescein amidite (FAM), Erythrosine, Rose Bengal, fluorescein secreted from the bacterium Pseudomonas aeruginosa, Methylene blue, Laser dyes, Rhodamine dyes, Rhodamine, Rhodamine 6G, Rhodamine B, Rhodamine 123, Auramine 0, Sulforhodamine 101, Sulforhodamine B, Texas Red, ATTO dyes, Acridine dyes, Acridine orange, Acridine yellow, Alexa Fluor, 7-Aminoactinomycin D, 8-Anilinonaphthalene-l-sulfonate, Auramine-rhodamine stain, Benzanthrone, 5, 12-Bis(phenylethynyl)naphthacene, 9, 10 -Bis(phenylethynyl)anthracene, Blacklight paint, Brainbow, Calcein, Carboxyfluorescein, Carboxyfluorescein diacetate succinimidyl ester, Carboxyfluorescein succinimidyl ester, 1 -Chloro-9, 10-bis(phenylethynyl)anthracene, 2-Chl oro-9, 10-bi s(pheny 1 ethyny 1)anthracene, 2-Chl oro-9, 10-di pheny lanthracene, Coumarin, Cyanine dyes, Cy3, Cy5, Cy5.5, DiOC6, SYBR Green I, DAPI, Dark quencher, DyLight Fluor, Fluo-4, FluoProbes, Fluorone dyes, Calcein, Carboxyfluorescein, Carboxyfluorescein diacetate succinimidyl ester, Carboxyfluorescein succinimidyl ester, Eosin, Eosin B, Eosin Y, Erythrosine, Fluorescein, Fluorescein isothiocyanate, Fluorescein amidite, Indian yellow, Merbromin, Fluoro-Jade stain, Fura-2, Fura-2-acetoxymethyl ester, Green fluorescent protein, Hoechst stain, Indian yellow, Indo-1, Lucifer yellow, Luciferin, Merocyanine, Optical brightener, Oxazin dyes, Cresyl violet, Nile blue, Nile red), Perylene, Phenanthridine dyes, Ethidium bromide, Propidium iodide, Phloxine, Phycobilin, Phycoerythrin, Phycoerythrobilin, Pyranine, Rhodamine, Rhodamine 123, Rhodamine 6G, RiboGreen, RoGFP, Rubrene, SYBR Green I, (E)-Stilbene, (Z)-Stilbene, Sulforhodamine 101, Sulforhodamine B, Synapto-pHluorin, Tetraphenyl butadiene, Tetrasodium tris(bathophenanthroline disulfonate) ruthenium(II), TSQ, Umbelliferone, and Yellow fluorescent protein.
8. The method of claim 1 , wherein said fluorescent signals comprise a light at a wavelength in the visible range.
9. The method of claim 1 , wherein said fluorescent signals comprise lights of different wavelengths in the visible range.
10. The method of claim 1 , wherein the plurality of different labeled probe-pairs comprises 3 probe-pairs.
11. The method of claim 1 , wherein the plurality of different labeled probe-pairs comprises 4 probe-pairs.
12. The method of claim 1 , wherein the cell comprises at least 1000 mRNA species.
13. The method of claim 1 further comprising:
(iii) quantifying the mRNA species of interest in said single cell.