EP2086937A1 - Nouveaux derives de la triphenylamine utiles comme fluorophores en biologie, notamment pour la microscopie biphotonique - Google Patents
Nouveaux derives de la triphenylamine utiles comme fluorophores en biologie, notamment pour la microscopie biphotoniqueInfo
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- EP2086937A1 EP2086937A1 EP07822407A EP07822407A EP2086937A1 EP 2086937 A1 EP2086937 A1 EP 2086937A1 EP 07822407 A EP07822407 A EP 07822407A EP 07822407 A EP07822407 A EP 07822407A EP 2086937 A1 EP2086937 A1 EP 2086937A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D213/36—Radicals substituted by singly-bound nitrogen atoms
- C07D213/38—Radicals substituted by singly-bound nitrogen atoms having only hydrogen or hydrocarbon radicals attached to the substituent nitrogen atom
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
Definitions
- the present invention relates to novel triphenylamine derivatives useful as fluorophores in biology, especially for biphotonic microscopy.
- compositions comprising these derivatives, to the use of these compositions as well as derivatives themselves for the labeling of biological molecules (or "biomolecules") of the nucleic acid, oligonucleotide, protein, polypeptide type, plasmids, etc., for their observation in particular by two-photon microscopy, and to biomolecules labeled with said derivatives.
- biological molecules or "biomolecules”
- biomolecules of the nucleic acid, oligonucleotide, protein, polypeptide type, plasmids, etc.
- Fluorescence microscopy is a tool commonly used by biologists because of its ability to detect, quantify and provide images of both the natural components of biological systems and of elements unrelated to these systems.
- fluorophores have the particularity to bind specifically to biomolecules: for example, 4, 6-diaminido-2-phenylindole (or DAPI), which fluoresces in blue when excited by a violet light, is fixed specifically on DNA.
- Other fluorophores do not have this ability and need to be grafted on a molecule specific to that which one seeks to detect. This is the case, for example, with rhodamine and fluorescein that can be used either to detect an antigen, in which case they are grafted on an antibody specific for this antigen, or as tracers of cell lineage, in which case they are transplanted onto a molecule with good stability in biological media such as dextran.
- fluorescence microscopy has grown considerably thanks to the arrival of new optical technologies including confocal laser scanning microscopy and, more recently, two-photon excitation fluorescence microscopy, also called biphotonic microscopy.
- biphotonic microscopy is, of all fluorescence microscopy techniques, the one that develops most in the field of biology. Its principle is to simultaneously bring two photons of energy identical to a compound to produce an excitation equivalent to that which would have driven a single photon of high energy. For the process to be effective, it is necessary for the photons to reach the compound in a very short time interval, of about 10-15 seconds, which has been made possible by the use of laser light sources producing pulses. ultra-brief and very intense.
- Two-photon microscopy has many advantages. Indeed, the processes of photobleaching and phototoxicity, often limiting in single-photon microscopy, are here limited to the maximum. In addition, excitation photons, which are typically located in the near infrared
- excitation radiation is less destructive for biological samples and penetrates deeper into tissue up to about 0.5 mm.
- two-photon microscopy has a spatial resolution as good as that of confocal laser scanning microscopy, that is to say of the order of a micrometer.
- fluorophores used in two-photon microscopy are the same as those used in single-photon microscopy.
- these fluorophores have poor two-photon fluorescence properties, especially in terms of absorption cross-section, which limits the scope of applications of bi-photon microscopy in biology.
- the inventors have therefore set themselves the goal of developing fluorophores that are perfectly adapted to the use of two-photon fluorescence in the field of biology.
- R 4 represents a hydrogen atom or a linker linker group, in which case:
- R 4 represents a hydrogen atom
- R 1 represents a linking group or a group of formula (II) below: in which: * Qi represents:
- R 5 represents a hydrocarbon group
- any one of R 6 to Rio represents a covalent bond connecting said heterocyclic group to B, while the others of R 6 to Rio represent, independently of one another, a hydrogen atom or a hydrocarbon group; or a heterocyclic group of formula (ii) or (iii) below:
- R 5 represents a hydrocarbon group
- any one of Rn to Ri 7 represents a covalent bond connecting said heterocyclic group to B, while the others of Rn to Ri 7 represent, independently of one another, a hydrogen atom or a hydrocarbon group
- R12, R14 and R16 can also form, respectively with Rn and / or Ri 3 , R13 and / or Ri 5 , and with Ri 5 and / or Ri 7 , a
- R 5 represents a hydrocarbon group
- W represents an oxygen or sulfur atom or a group -N (R 3 i) - where R 31 is a hydrogen atom or a hydrocarbon group, or a group -C (R 3i) (R 32) - where R 31 and R 32 are, independently of one another, a hydrogen atom or a hydrocarbon group
- R30 represents a covalent bond connecting said heterocyclic group to B, while
- R 26 to R 29 represent, independently of each other, a hydrogen atom or a hydrocarbon group, R 27 may also form with R 2 6 and / or R 2 8 a bridging group, R 28 which can itself form with R 2 9 a bridging group;
- R33 to R36 represent, independently of one another, a hydrogen atom or a hydrocarbon group
- R33 and R36 can also form each with R34 and / or
- R35 a bridging group; when R 1 represents a group of formula (II) above, then R 2 also represents a group of formula (II) above while, when R 1 represents a linker group, then R 2 represents a group of formula (III) above. after: in which: * Q2 represents:
- R 6 at Rio have the same meaning as in formula (i) above; or a heterocyclic group of formula (vii) or (viii) below:
- Rn to Ri 7 have the same meaning as in formulas (ii) and (iii) above; or a heterocyclic group of formula (ix) below:
- R 3 represents a group of formula (III) above while, when R 1 represents a group of formula (II) above, then R 3 represents a hydrogen or halogen atom; a hydrocarbon group or a group of formula (II) above; 2) if R 4 represents a linking group, then R 1 and R 2 represent a group of formula (III) above while R 3 represents a hydrogen or halogen atom, a hydrocarbon group or a group of formula (III) above; wherein the linker group is a functional group capable of allowing the grafting by chemical reaction of the compound on a biomolecule, or a hydrocarbon group comprising such a functional group, and wherein each of the hydrocarbon groups mentioned above can be substituted with one or more substituents, identical or different, and include one or more heteroatoms.
- the subject of the invention is also the isomers of these compounds as well as the addition salts of these compounds and their isomers.
- any one of R 1 to R 10 represents a covalent link connecting said heterocyclic group to B" used herein means that the heterocyclic group in question is directly attached to B by a covalent bond involving any carbon atoms of the cycle that constitutes it.
- any one of R 11 to R 17 represents a covalent bond connecting said heterocyclic group to B
- the hydrocarbon groups which can be used for R 5 to R 36 in the groups of formulas (II) and (III) above as well as for R 3 can be saturated, mono- or polyunsaturated groups, aliphatic (that is, linear or branched), mono- or polycyclic.
- these groups may, on the one hand, be substituted with one or more substituents, identical to each other or different from each other, and, on the other hand, include one or more heteroatoms, in which case this or these heteroatoms may as well bridge in said hydrocarbon groups as be carried by them in the form of substituents.
- heteroatom any atom other than carbon or hydrogen such as, for example, an oxygen atom, nitrogen, sulfur, halogen, phosphorus, boron or silicon, the oxygen, nitrogen, sulfur and halogen atoms (fluorine, iodine, chlorine, bromine) being preferred.
- hydrocarbon groups that may be used for R 5 to R 36 and for R 3 can in particular be:
- Alkyl groups linear or branched, such as, for example, methyl, ethyl, n-propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl or hexyl;
- Linear or branched alkenyl or alkynyl groups such as, for example, ethenyl or ethynyl, propenyl or propynyl, isopropenyl or isopropynyl, butenyl or butynyl, isobutenyl or isobutynyl, sec-butenyl or sec-butynyl, tert-butenyl or tert-butynyl, pentenyl or pentynyl, isopentenyl or isopentynyl;
- Cycloalkyl groups such as, for example, cyclopentyl or cyclohexyl groups
- Cycloalkenyl or cycloalkynyl groups such as, for example, cyclopentenyl groups or cyclopentynyl, cyclohexenyl or cyclohexynyl;
- fused ring aromatic groups such as, for example, cyclopentadienyl, phenyl, naphthyl, pyrenyl or anthracenyl groups;
- fused ring heteroaromatic groups such as, for example, furanyl, pyrrolyl, thiophenyl, oxazolyl, pyrazolyl, thiazolyl, imidazolyl, triazolyl, pyridinyl, pyranyl, quinolinyl, isoquinolinyl, pyrazinyl or pyrimidinyl groups; or
- the hydrocarbon groups which can be used for R 5 to R 3 6 contain not more than 10 carbon atoms.
- substituted (s) inclusive) are, if possible, C 1 to C 6 groups and, more preferably, C 1 to C 4 groups , in the case of aliphatic groups, or single cycle groups with 5 or 6 members in the case of cyclic groups.
- the hydrocarbon groups which may be used for R 5 to R 36 are C 1 -C 4 alkyl groups, in particular methyl or ethyl.
- the bridging groups that can be formed by:
- Ri 9 , R 2 i, R 23 and R 25 can also form, respectively with Ris and / or R 20, R 20 and / or R 22, R 22 and / or R 24, and with R 24 and / or Ris, in the groups of formula ( iv);
- R 33 and R 36 with R 34 and / or R 35 in groups A and B; are divalent groups formed by the sequence of n atoms chosen from carbon, nitrogen, oxygen and / or sulfur atoms and in which n is advantageously chosen so that the formation of these bridging groups results in the formation of 5- or 6-membered rings or heterocycles.
- the bridging groups capable of being formed by R 1 with R 1 4 in the groups of formulas (ii) and (vii), by R 12 with R 1 and by R 6 with R 7 in the groups of formulas (iii) and (viii) by R 8 with R 2 and R 2 with R 22 in the group of formula (iv), by R 33 and R 36 with R 34 and / or R 35 in groups A and B are preferably groups formed by the sequence of 2 or 3 atoms; while
- all other bridging groups which may be formed in the groups of formulas (ii) to (ix), are preferably groups formed by the chain of 3 or 4 atoms.
- these bridging groups are preferably unsaturated groups, the unsaturations of which typically correspond to double bonds.
- these double bonds form, between themselves and / or with the other double bonds present in the compounds, a system of conjugated double bonds.
- the bridging groups may be substituted with one or more substituents, which may be identical or different, provided that the chain of atoms which forms them comprises one or more carbon and / or nitrogen atoms. This or these substituents correspond, preferably, to halogen atoms, to aliphatic groups comprising at least one heteroatom such as, for example, -COOR ", -CHO, -OR", -SR ", -SCOR” groups.
- the compounds according to the invention typically correspond to the general formula (I) in which R 4 represents a hydrogen atom, Ri represents a group of formula (II) as defined above, R 2 represents a group of formula (II) identical to R 1, while R 3 represents a hydrogen or halogen atom, a hydrocarbon group as defined above or a group of formula (II) identical to R 1 and R 2 .
- Such compounds have at least two positively charged nitrogen atoms whose charges are counterbalanced by anions.
- These anions may especially be halide ions such as I ⁇ , Cl “ , Br “ , F “ , nitrate ions, phosphate ions such as PO 4 3" or PF 6 " , carbonate ions, carboxylate ions such as CH 3 COO " , sulphite ions such as SO 3 2 " or HSO 3 " , sulphate ions such as SO 4 2 “ or HSO 4" , sulphonate ions such as CF 3 SO 3 " or alkyl-SO 3 " , or even BF 4 " ions .
- the group of formula (II) constituting R 1 and R 2 , and optionally R 3 is preferably a group in which a is 0, which means that A is absent, while R 35 and R 36 of B represent hydrogen atoms or C 1 -C 4 alkyl groups, advantageously methyl or ethyl.
- Q 1 may represent any of the heterocyclic groups of formulas (i) to (v) above, it is preferred however that it represents either a group of formula (i) as defined above, a group of formula (v) as defined above.
- Groups of formula (II) satisfying these criteria are typically: (a) groups of formula (II-1) below:
- R 5 represents a C 1 -C 4 alkyl group, preferably methyl or ethyl
- R 6 to R 6, R 35 and R 36 represent, independently of each other, a hydrogen atom or a C 1 -C 4 alkyl group; at C 4 , preferably methyl or ethyl
- R 5 represents a C 1 -C 4 alkyl group, preferably methyl or ethyl
- R 6 to R 8 , R 10 , R 35 and R 36 represent, independently of one another, a hydrogen atom or a alkyl group in Ci to C4, preferably methyl or ethyl
- R 5 represents a C 1 -C 4 alkyl group, preferably methyl or ethyl
- R 6 , R 7 , R 9 , R 10 , R 35 and R 36 represent, independently of each other, an atom hydrogen or alkyl to C 4, preferably methyl or ethyl
- R 5 represents a C 1 -C 4 alkyl group, preferably methyl or ethyl
- R 2 to R 29 , R 35 and R 36 represent, independently of one another, a hydrogen atom or an alkyl group
- Ci to C 4 of preferably methyl or ethyl.
- R 1 and R 2 are both a group of formula (II-5) wherein R 5 represents a methyl group, while R 3 represents a hydrogen atom or a group of formula (II-5) ) identical to Ri and R2.
- halides and, in particular, bis- [4- (2-N-methyl-pyridinium-4-yl-vinyl) phenyl] phenylamine iodides and tris- [4- (2-N-methylpyridinium-4-yl-vinyl) phenyl] amine.
- the compounds according to the invention typically correspond to the general formula (I) in which:
- R 4 represents a hydrogen atom, in which case R 1 represents a linking group, R 2 represents a group of formula (III) as defined above and R 3 represents a group of formula (III) identical to R 2 ;
- R 4 represents a linking group, in which case R 1 represents a group of formula (III) as defined above, R 2 represents a group of formula (III) identical to R 1, while R 3 represents a hydrogen or hydrogen atom; halogen, a hydrocarbon group as defined above or a group of formula (III) identical to R 1 and R 2 .
- the linker group or the functional group which the linker group comprises when the latter is a hydrocarbon group can be selected from among many functional groups, as long as they are capable of chemically reacting with a functional group belonging to the biomolecule (s) it intends to label with these compounds.
- An exhaustive list of linker groups likely to be used can not be given, but a person skilled in the art will know how to choose an appropriate linker group.
- the linker group should preferably be a very hydrophilic group such as a polyhydric alcohol, a polyol, a polyethylene glycol or a polyamine.
- a polyethylene glycol linker group will be particularly suitable as described by Mac Laughin et al. (J. Org Chem 1997, 62 (3), 523-529 [5]).
- a linker group constituted by or comprising a group carboxylic acid, a group derived from a carboxylic acid (for example, an acid halide or a acid anhydride), an activated ester (for example, an N-hydroxysuccinimidyl, pentafluorophenyl or para-nitrophenyl ester), a primary amine group or a leaving group of the halide, tosylate, mesylate, maleimide, etc. type, can be used.
- a linker group constituted by or comprising a group carboxylic acid, a group derived from a carboxylic acid (for example, an acid halide or a acid anhydride), an activated ester (for example, an N-hydroxysuccinimidyl, pentafluorophenyl or para-nitrophenyl ester), a primary amine group or a leaving group of the halide, tosylate, mesylate, maleimide, etc. type, can be
- R4 represents the linker group
- it is preferably ⁇ of the R1 group.
- the compounds comprise at least two positively charged nitrogen atoms whose charges are, again, counterbalanced by anions such as those mentioned above .
- the group of formula (III) constituting R 2 and R 3 when R 4 is a hydrogen atom, or R 1, R 2 , and optionally R 3 , when R 4 is a spacer group, is preferably a group in which wherein a is 0, while R 35 and R 3 B 6 represent hydrogen atoms or alkyl groups -C 4, preferably methyl or ethyl.
- Q 2 preferably represents either a group of formula (vi) as defined above, or a group of formula (ix) as defined above.
- Groups of formula (III) satisfying these criteria are typically: (a) groups of formula (III-1) below:
- R 1 to R 6, R 35 and R 36 are, independently of one another, a hydrogen atom or a C 1 -C 4 alkyl group, preferably methyl or ethyl; (b) groups of formula (III-2) below:
- R 1 to R 5 R 10, R 35 and R 36 independently of one another are hydrogen or C 1 -C 4 alkyl, preferably methyl or ethyl; (c) groups of formula (III-3) below:
- R 6 , R 7 , R 6 , R 10 , R 35 and R 36 independently of one another are hydrogen or C 1-4 alkyl, preferably methyl or ethyl; and (d) groups of formula (III-4) below:
- R26 to R29, R35 and R36 represent, independently of each other, a hydrogen atom or an alkyl group -C 4 methyl or ethyl radical.
- R 4 is a linker group
- R 1, R 2 and R 3 all represent:
- the starting compound is generally a triphenylamine mono-, di- or trisubstituted with a halogen atom, for example bromine or iodine, or an aldehyde which is subjected to one or more successive coupling reactions to graft on the phenyl rings the groups respectively constituting R 1, R 2 , R 3 and / or R 4 in the compounds of general formula (I).
- a halogen atom for example bromine or iodine
- an aldehyde which is subjected to one or more successive coupling reactions to graft on the phenyl rings the groups respectively constituting R 1, R 2 , R 3 and / or R 4 in the compounds of general formula (I).
- the coupling can sometimes lead to products having one to several substituents that can be separated by purification.
- the use of silica gel chromatography is then recommended.
- R 1 to R 3 are identical then, starting from a starting compound comprising, for example, -Br, -I or -CHO functions, it suffices to react a compound comprising an alkene, phosphonate or phosphonium type function in proportions at least stoichiometric.
- R 3 is different from Ri and R 2 or in the case where R 1 is different from R2 and R3, it is possible to proceed in the same way provided that R3 in the first case or Ri in the second case does not react during coupling.
- protecting groups to protect one or more functions that can react in order to guide the coupling reactions and to promote these reactions in a particular direction.
- the subject of the invention is also a composition which comprises at least one compound corresponding to the general formula (I) as defined above, in solution in a solvent.
- this labeling will preferably be carried out for the purpose of observing said biomolecules by two-photon microscopy.
- the compounds according to the invention as markers of biomolecules as proteins in other applications such as, for example, in epifluorescence microscopy or in confocal microscopy.
- the subject of the invention is also a biomolecule labeled with at least one compound corresponding to the general formula (I) as defined above, this biomolecule being, preferably, an acid nucleic acid or a fragment of a nucleic acid (oligonucleotide for example), a protein, a polypeptide or a fragment of a protein or polypeptide.
- this biomolecule being, preferably, an acid nucleic acid or a fragment of a nucleic acid (oligonucleotide for example), a protein, a polypeptide or a fragment of a protein or polypeptide.
- FIG. 1 illustrates the synthesis scheme of a first compound according to the invention (TP-2Py).
- FIG. 2 illustrates the synthesis scheme of another compound according to the invention (TP-3Py).
- FIG. 3 illustrates the influence of the presence of DNA on the absorption spectrum (optical density (OD) as a function of the wavelength ( ⁇ )) of a compound according to the invention (TP-2Py) in solution (5 ⁇ M) in sodium cacodylate buffer (10 mM, pH 7.0); are shown in this figure, the absorption spectrum of the compound as obtained in the absence of DNA (m) and its absorption spectra as obtained in the presence of 0.5 equivalent ( ⁇ ), 1 equivalent (0), 2 equivalents (X) and 5 equivalents (O) of DNA.
- OD optical density
- FIG. 4 which is a figure similar to FIG. 3, illustrates the influence of the presence of DNA on the absorption spectrum (optical density (OD) as a function of the wavelength ( ⁇ )), another compound according to the invention (TP-3Py), also in solution (5 ⁇ M) in sodium cacodylate buffer (10 mM, pH 7.0); here also, are represented in this figure, the absorption spectrum of the compound as obtained in the absence of DNA (m) and its absorption spectra as obtained in the presence of 0.5 equivalents ( ⁇ ) , 1 equivalent (0), 2 equivalents (X) and 5 equivalents (O) of DNA.
- OD optical density
- FIG. 5 illustrates the influence of the presence of DNA on the emission spectrum (fluorescence intensity (I f i uo ), expressed in counts per second (cps), as a function of the wavelength ⁇ ), a compound according to the invention (TP-3Py) in solution (3 ⁇ M) in sodium cacodylate buffer (10 mM, pH 7.0) and for excitation at 474 nm; are shown in this figure, the emission spectrum of the compound in the absence of DNA (curve A) and that obtained in the presence of 1 equivalent of DNA (curve B).
- FIG. 6 illustrates the influence of the presence of DNA on the intensity of the fluorescence emitted by two compounds according to the invention (TP-2Py (m) and
- FIG. 7 represents the variations of the fluorescence intensity (I f i uo ), expressed in arbitrary units, as a function of time, expressed in seconds, as measured for a compound according to the invention (TP-3Py (4)) and for TO-PRO-3 ( ⁇ ), during irradiation with a 150 W xenon-mercury lamp.
- FIG. 8 represents the variations of the two-photon absorption cross-section ⁇ , expressed as Göppert- Mayer, as a function of the wavelength (nm) as measured for two compounds according to the invention (TP-2Py ( m) and TP-3Py (4)), for a compound which is structurally very close to them, tris- [4- (2-pyridin-4-yl-vinyl) phenyl] amine (•), and for fluorescein ( ⁇ ), the fluorescein being in solution in water (pH> 10), TP-2Py and TP-3Py being in solution in glycerol and tris- [4- (2-pyridin-4-yl-vinyl) phenyl) amine being in solution in dichloromethane.
- FIG. 9 represents the results of a test similar to that whose results are presented in FIG. 8, but which was carried out using the two compounds according to the invention (TP-2Py (m) and TP-3Py (4) )) in solution in sodium cacodylate buffer (10 mM, pH 7.3) supplemented with 5 equivalents of herring testis DNA.
- FIGS. 10A and 10B correspond to images, taken in epifluorescence microscopy, of CHO K1 cells treated with a mixture of a compound according to the invention (TP-3Py 2 ⁇ M) and DAPI (3 ⁇ M); these images were taken at the maximum fluorescence emission of the compound according to the invention in the case of FIG. 10A and the maximum fluorescence emission of the DAPI in the case of FIG. 1B.
- FIG. 10C corresponds to overlapping, performed by computer processing, FIGS. 1OA and 10B which shows colocalization of markers in the nucleus.
- Figures HA and HB correspond to images, taken in epifluorescence microscopy, of CHO K1 cells treated with a mixture of another compound according to the invention (TP-2Py 2 ⁇ M), and of DAPI
- FIGS. 12A, 12B, 12C, 12D, 12E and 12F correspond to images taken in phase contrast microscopy (FIGS. 12A and 12D) and in confocal microscopy (FIGS. 12B and 12E) and by coupling these two methods (FIG.
- Example 1 Compounds useful in direct fluorescence
- TP-2Py and TP-3Py have a high solubility in water since aqueous solutions of these compounds 0.5 to 1 mM could be obtained without any precipitate being formed.
- This aqueous solubility is a real advantage, especially for biological applications, since it makes it possible to work in an aqueous medium and not to use an organic solvent such as DMSO which, although conventionally used in this field, is deleterious for cell membranes. .
- aqueous solutions of TP-2Py and TP-3Py follow the Beer-Lambert law, at least up to a concentration of 50 ⁇ M.
- the orange thiazole is, under the conditions in which it is conventionally used, that is to say at a concentration of 36 ⁇ M and at a temperature of 20 ° C., in the form of dimers (Kubista et al. , Biopolymers 1998, 46, 39-51 [8]).
- the maximum wavelengths of absorption of these two compounds are in the 450-500 nm range and are therefore perfectly compatible with the use of Titanium: Saphir lasers which are used in two-photon microscopy and which are generally tunable in the spectral range of 750-900 nm.
- FIGS. 3 and 4 represent the absorption spectra of TP-2Py and TP-3Py, respectively, obtained from 5 ⁇ M solutions of these compounds, before and after they are not added a 26-base pair duplex DNA of autocomplementary sequence (hereinafter "ds26"), at levels ranging from 0.5 to 5 equivalents, indicate a high affinity of TP-2Py and TP-3Py for DNA in conditions analogous to physiological conditions.
- ds26 26-base pair duplex DNA of autocomplementary sequence
- FIG. 5 represents the emission spectra obtained from a 3 ⁇ M solution of TP-3Py, before and after the addition of 1 equivalent of ds26, for a 474 excitation. nm, as well as in FIG. 6 which represents the variations of the fluorescence intensity (I f i uo ) obtained from 3 ⁇ M solutions of TP-IPy (A), TP-2Py (U) and TP-3Py ( 4), also for excitation at 474 nm, depending on the number of equivalents of ds26 added.
- I f i uo fluorescence intensity
- TP-2Py and TP-3Py were determined by fluorometric titration under stringent conditions (10mM sodium cacodylate sodium cacodylate buffer, pH 7.0 supplemented with 100mM NaCl) and using ds26 as DNA.
- stringent conditions 10mM sodium cacodylate sodium cacodylate buffer, pH 7.0 supplemented with 100mM NaCl
- ds26 ds26 as DNA.
- K d dissociation constant K d of the order of one micromolar was obtained, confirming their very high affinity for DNA.
- TP-3Py The ability of TP-3Py to resist the effects of irradiation was tested and compared to that of a fluorophore conventionally used as a DNA marker in epifluorescence and confocal microscopies, namely TO-PRO-3 ( 1- (N, N, N-trimethylamino-propyl) -4- ⁇ 2- [3-methyl-2,3-dihydro- (benzo-1,3-thiazole) -2-ethylidene] -vinyl iodide; quinolinium).
- FIG. 7 which represents the variations in fluorescence intensity (I f i uo ), expressed in arbitrary units, as a function of time, expressed in seconds, as measured for TP-3Py and TO- PRO-3 during a irradiation by a 150 W xenon-mercury lamp of about thirty minutes, the emission of fluorescence of TP-3Py is little modified by the irradiation, while that of the TO-PRO- 3 fall of more than 40%.
- the two-photon absorption properties of the compounds according to the invention were assessed using the technique of fluorescence induced by two photons (TPIF for "Two-Photon-Induced Fluorescence") and by means of a femtosecond laser source Titanium: Sapphire pulsed from 90 fs to 76 MHz that can be tuned to 750-840 nm.
- TPIF fluorescence induced by two photons
- Titanium: Sapphire Titanium: Sapphire pulsed from 90 fs to 76 MHz that can be tuned to 750-840 nm.
- the relative TPIF intensities of the compounds according to the invention were measured relative to a standard reference marker, fluorescein, as well as a compound structurally very close to TP-2Py and TP-3Py, tris- [4- (2 -pyridin-4-yl-vinyl) phenyl] amino.
- the measurements were carried out using TP-2Py and TP-3Py in glycerol, fluorescein and tris- [4- (2-pyridin-4-yl-vinyl) phenyl] amine being, they respectively in water (pH> 10) and in dichloromethane.
- FIG. 8 which represents the variations of the two-photon absorption cross section ⁇ , expressed in G ⁇ ppert- Mayer, as a function of the wavelength (nm) as obtained for TP-2Py (H). ), TP-3Py (4), tris- [4- (2-pyridin-4-yl-vinyl) phenyl] amine (•) and fluorescein ( ⁇ ), a relative maximum of around 820 nm is observed for TP-2Py and TP-3Py.
- ⁇ corresponds to the molar extinction coefficient, expressed in L / mol.cm
- ⁇ F corresponds to the fluorescence quantum yield
- ⁇ corresponds to at the two-photon absorption cross section, expressed as G ⁇ ppert- Mayer (GM).
- TP-3Py has a large absorption cross-section at two photons since it reaches a value of 700 GM in glycerol and 700 GM and in the presence of DNA. This significantly higher than those obtained for DAPI (0.16 GM), for fluorescein (38 GM) and for rhodamine 6G (100 GM), which is nevertheless considered to be one of the best fluorophores for microscopy. photonic.
- tris- [4- (2-pyridin-4-yl-vinyl) phenyl] amine which is structurally very close to TP-3Py, exhibits as the latter a maximum of excitation towards 820 nm but the value of its two-photon absorption cross section is only 58 GM according to the literature and 90 GM according to measurements made by the inventors.
- CHO-K1 cells previously cultured in wells, on polyornithine coated glass supports, containing a commercially available standard culture medium, were fixed using a solution of formaldehyde (4%) in PBS.
- the cells were then incubated, at room temperature and for 20 minutes, in the presence of markers or mixtures of test markers (in aqueous solution), then washed with PBS buffer (NaCl 13mM, 0.27mM KCl, 0.15mM KH 2 PO 4 , 0.8mM Na 2 HPO 4 , pH 7.4) to remove excess label.
- PBS buffer NaCl 13mM, 0.27mM KCl, 0.15mM KH 2 PO 4 , 0.8mM Na 2 HPO 4 , pH 7.4
- the observations by epifluorescence microscopy were carried out with a Nikon microscope, Eclipse E 800, equipped with a 6Ox objective (1.4) and a Nikon digital camera, DXM 1200, whereas those by confocal microscopy were carried out with a microscope
- the Leica DM6000 features an SP2 unit with a 63x (1.4) lens and a HeNe laser for marker excitation. As shown in Figures 10A, 10B and
- FIGS. 12A to 12F which correspond to images of cells treated with TP-3Py, taken by phase contrast microscopy (FIGS. 12A and 12D), in confocal microscopy (FIGS. 12E) and by superimposing these two methods (FIGS. 12C and 12F), at the maximum fluorescence emission of TP-3Py, the latter made it possible to obtain, by coupling of phase contrast and confocal microscopies, chromosome images. in anaphase of a very sharpness and high resolution, with a very clear definition of the limits of the cell.
- compound 12 60 mg
- compound 13 (40 mg, 50 ⁇ mol), N-hydroxysuccinimide (9 mg, 78 ⁇ mol) and DCC (11 mg) are dissolved in dichloromethane (1 mL) and the mixture is stirred for 24 hours. . Then the medium is evaporated, taken up in a minimum of dichloromethane. The milky suspension is filtered, the operation is repeated several times. The mother liquors are evaporated to dryness to give compound 14 in the form of an orange-yellow powder.
- compound 16 24 mg, 25.8 ⁇ mol
- rac-7-oxabicyclo [2.2.1] heptene-2,3-dicarboxylic imide (5 mg, 28.4 ⁇ mol).
- K2CO3 (18 mg, 129 ⁇ mol, 5 eq.).
- the white suspension obtained is stirred at 55 ° C.
- 1, 9-dibromononane (730 ⁇ l, 20 eq.) And potassium carbonate (125 mg, 5 eq.) are stirred for 3 hours at room temperature in DMF (1 mL). Then the reaction crude is poured into a large volume of ether
- the compound 22 (30 mq) is dissolved in 5 ml of an irethanoi / iodomethane mixture
- oligonucleotide having a terminal function, in the 3 'or 5' position, of the thiophosphate type and comprising ammonium counter-ions (NH 4 + ) is dissolved in a solution of 18-C-6 crown ether in methanol. (previously treated with a chelating resin) at approximately 20 OD per mL. Compound 16 (about 2 mg) is added, and the mixture is vortexed and stirred at 35 ° C for 6 hours.
- the mixture is then subjected to a purification procedure by following the procedure below: the mixture is first evaporated, taken up in water (1 mL) and extracted several times with dichloromethane and then with dichloromethane. 'ethyl until that the organic phases remain colorless. The residual non-aqueous solvent is removed under vacuum, and the aqueous solution is diluted with 1M NaCl in a 5/1 (v / v) water / acetonitrile mixture. This solution is purified on a size exclusion column (exclusion ⁇ 1000 Da) and the first colored eluate fraction is recovered. If necessary, the fraction obtained is purified by HPLC according to the usual procedures.
- the purification is carried out using a reverse phase column (RP-18) and a water / acetonitrile or water / methanol elution system, with a pH of about 7 and comprising a dissolved salt (about 0.1M) of type (trialkyl) ammonium acetate.
- RP-18 reverse phase column
- the isolated fractions are lyophilized at least three times.
- oligonucleotide having a primary amine function is dissolved in 0.5% NaHCC buffer> 3 at pH 9.5 at a level of 10 OD per 500 ⁇ L.
- Compound 14 (approximately 1 to 2 mg) dissolved in DMF (approximately 300 ⁇ L, previously purified amine impurities) is added. The mixture is stirred for 24 hours at 35 ° C.
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Abstract
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0654837A FR2908408B1 (fr) | 2006-11-10 | 2006-11-10 | Nouveaux derives de la triphenylamine utilies comme fluorophores en biologie, notamment pour la microscopie biphotonique |
| PCT/EP2007/062106 WO2008055969A1 (fr) | 2006-11-10 | 2007-11-09 | Nouveaux derives de la triphenylamine utiles comme fluorophores en biologie, notamment pour la microscopie biphotonique |
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| Publication Number | Publication Date |
|---|---|
| EP2086937A1 true EP2086937A1 (fr) | 2009-08-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP07822407A Withdrawn EP2086937A1 (fr) | 2006-11-10 | 2007-11-09 | Nouveaux derives de la triphenylamine utiles comme fluorophores en biologie, notamment pour la microscopie biphotonique |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8664400B2 (fr) |
| EP (1) | EP2086937A1 (fr) |
| FR (1) | FR2908408B1 (fr) |
| WO (1) | WO2008055969A1 (fr) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4623166B2 (ja) | 2008-08-25 | 2011-02-02 | ソニー株式会社 | 標識化合物及びこれを用いた検出方法 |
| US8993767B2 (en) * | 2010-01-12 | 2015-03-31 | Centre National De La Recherche Scientifique | Multiphoton activable quinoline derivatives, their preparation and their uses |
| JP5310702B2 (ja) * | 2010-11-01 | 2013-10-09 | ソニー株式会社 | 標識化合物及びこれを用いた検出方法 |
| CN102181282A (zh) * | 2011-03-22 | 2011-09-14 | 天津大学 | 含有三苯胺和联吡啶结构的空穴传输材料及制备方法 |
| DE102011001722A1 (de) * | 2011-04-01 | 2012-10-04 | Bundesdruckerei Gmbh | Halbzeug zur Herstellung eines Chipkartenmoduls, Verfahren zur Herstellung des Halbzeuges sowie Verfahren zur Herstellung einer Chipkarte |
| EP2711366A1 (fr) * | 2012-09-19 | 2014-03-26 | Institut Curie | Dérivés de triphénylamine cationique activables par la lumière infrarouge et visible pour l'imagerie et l'induction d'apoptose dans des cellules cancéreuses |
| CN104962277B (zh) * | 2015-05-04 | 2017-05-24 | 四川大学 | 有机单分子白光材料双三苯胺取代邻羟基苯基唑类衍生物的制备及应用 |
| CN105153733B (zh) * | 2015-08-07 | 2017-03-22 | 山东大学 | 一种具有大双光子荧光活性截面的膜通透性染料及其应用 |
| EP4173621A1 (fr) | 2021-10-29 | 2023-05-03 | Université de Bordeaux | Composition pharmaceutique, son utilisation en tant que médicament et nouveaux composés, en particulier pour le traitement d'une infection sars-cov-2 |
| CN114315608B (zh) * | 2022-01-07 | 2024-05-28 | 大连理工大学盘锦产业技术研究院 | 一种由三苯胺制备三(4-乙炔基苯基)胺的方法 |
| CN115058126B (zh) * | 2022-05-16 | 2023-10-03 | 闽都创新实验室 | 苯乙烯半菁荧光染料及其制备方法和在稀土多彩长余辉发光材料中的应用 |
| CN115536640B (zh) * | 2022-10-20 | 2025-03-21 | 河南农业大学 | 一种近红外聚集诱导发光材料及其制备方法与应用 |
| CN116023346B (zh) * | 2022-12-14 | 2024-08-23 | 中山大学 | 一种具有脂滴和线粒体双色成像功能的单分子荧光探针及其制备方法和应用 |
| CN116400068B (zh) * | 2023-02-13 | 2023-09-22 | 泉州圣源警用侦察设备有限公司 | 一种用于含dna的潜在生物痕迹显现的试剂及显现方法 |
| CN119798148B (zh) * | 2024-12-31 | 2025-10-10 | 浙江工业大学 | 具有多阳离子结构的荧光化合物及其合成与应用 |
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| US2465412A (en) * | 1945-04-28 | 1949-03-29 | Du Pont | Sensitizing dyes containing styryl dye nuclei |
| BE468002A (fr) * | 1945-10-26 | |||
| DE10157615A1 (de) * | 2001-11-26 | 2003-06-05 | Chromeon Gmbh | Neue Fluorochrome für die Markierung von Biomolekülen und Polymerpartikel, und darauf beruhende bioanalytische und Screening-Verfahren |
| EP2270106A3 (fr) * | 2005-04-22 | 2011-06-29 | GE Healthcare UK Limited | Composés indolium contenant des substituants fluorés |
-
2006
- 2006-11-10 FR FR0654837A patent/FR2908408B1/fr not_active Expired - Fee Related
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2007
- 2007-11-09 EP EP07822407A patent/EP2086937A1/fr not_active Withdrawn
- 2007-11-09 US US12/514,040 patent/US8664400B2/en not_active Expired - Fee Related
- 2007-11-09 WO PCT/EP2007/062106 patent/WO2008055969A1/fr not_active Ceased
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| See references of WO2008055969A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008055969A1 (fr) | 2008-05-15 |
| US20090314990A1 (en) | 2009-12-24 |
| FR2908408A1 (fr) | 2008-05-16 |
| FR2908408B1 (fr) | 2009-01-30 |
| US8664400B2 (en) | 2014-03-04 |
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