Two-photon probe for real-time monitoring of intracellular...

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C560S044000, C435S029000

Reexamination Certificate

active

07888532

ABSTRACT:
A two-photon probe for real-time monitoring of intracellular magnesium ions is provided. Specifically, the two-photon probe is represented by Formula 1:wherein R is H or CH2OCOCH3.The two-photon probe is very suitable for real-time imaging of intracellular magnesium ions. The two-photon probe shows 17-fold two-photon excited fluorescence enhancement in response to Mg2+, which is 7-fold stronger than commercial probes, thus enabling staining of cells in a greatly reduced amount. In addition, the two-photon probe has a sufficiently low molecular weight to stain cells and is very suitable for monitoring Mg2+ions present in the deep tissue. Furthermore, the two-photon probe can be effectively used for the quantitative as well as qualitative detection of intracellular magnesium ions. Further provided are a method for preparing the two-photon probe and a method for real-time monitoring of intracellular magnesium ions using the two-photon probe.

REFERENCES:
Kim et al, Angew. Chem. Int. Ed. 2007, 46, 3460-3463.
H. Komatsu, et al.,Design and Synthesis of Highly Sensitive and Selective Fluorescein-Derived Magnesium Fluorescent Probes and Application to Intracellular 3D Mg2+Imaging, J. Am. Chem. Soc., vol. 126, 2004, pp. 16353-16360.
G Farruggia, et al.,8-Hydroxyquinoline Derivatives as Fluorescent Sensors for Magnesium in Living Cells, J. Am. Chem. Soc. vol. 128, 2004, pp. 344-350.
W. R. Zipfel, et al.,Nonlinear magic: multiphoton microscopy in the biosciences, Nature Biotechnology, vol. 21, No. 11, Nov. 2003, pp. 1369-1377.
F. Helmchen, et al.,Deep tissue two-photon microscopy, Nature Methods, vol. 2, No. 12, 2005, pp. 932-940.
R. M. Williams, et al.,Multiphoton microscopy in biological research, Current Opinion in Chemical Biology. vol. 5, 2001, pp. 603-608.
R. Long, et al.,The Rigorous Evaluation of Spectrophotometric Data to Obtain an Equilibrium Constant, J. Chem. Ed., vol. 59, No. 12, Dec. 1982, pp. 1037-1039.
K. Hirose,A Practical Guide for the Determination of Binding Constants, Journal of Inclusion Phenomena and Macrocyclic Chemistry, vol. 39, 2001, pp. 193-209.
B. Metten, et al.,Synthesis of APTRA Derivatives as Building Blocks for Low-Affinity Fluorescent Ca2+Indicators, Synthesis, No. 11, 2005, pp. 1838-1844.
J. N. Demas, et al.,The Measurement of Photoluminescence Quantum Yields—A Review, Journal of Physical Chemistry, vol. 75, No. 8, Apr. 15, 1971, 991-1024.
C. Reichardt,Solvatochromic Dyes as Solvent Polarity Indicators, Chem. Rev. vol. 94, No. 8, 1994, pp. 2319-2358.
H. A. Benesi, et al.,A Spectrophotometric Investigation of the Interaction of Iodine with Aromatic Hydrocarbons, J. Am. Chem. Soc., vol. 71, 1949, pp. 2703-2707.
G Grynkiewicz, et al.,A New Generation of Ca2+Indicators with Greatly Improved Fluorescence Properties, Journal of Biological Chemistry, vol. 260, No. 6., 1985, pp. 3440-3450.
R. Y. Tsien, et al.,Calcium Homeostasis in Intact Lymphocytes: Cytoplasmic Free Calcium Monitored With a New, Intracellularly Trapped Fluorescent Indicator, Journal of Cell Biology, vol. 94, Aug. 1982, pp. 325-334.
R. Y. Tsien,Measurement of Cytosolic Free Ca2+withQuin2, Methods in Enzymology, vol. 172, 1989, pp. 230-262.
A. Takahashi, et al.,Measurement of Intracellular Calcium, Physiological Review, vol. 79, No. 4, Oct. 1999, pp. 1089-1125.
H. Szmacinski, et al.,Fluorescence Lifetime Characterization of Magnesium Probes: Improvement of Mg2+ Dynamic Range and Sensitivity Using Phase-Modulation Fluorometry, Journal of Fluorescence, vol. 6, No. 2, 1996, pp. 83-95.
I. J. Reynolds,Measurement of Cation Movement in Primary Cultures Using Fluorescent Dyes, Current Protocols in Neuroscience, Supplement 4, 1998, pp. 7.11.1-7.11.17.
M. R. Cho, et al.,Transmembrane calcium influx induced by ac electric fields, The FASEB Journal, vol. 13, Apr. 1999, pp. 677-683.
Haugland, R.P.,The Handbook: A Guide to Fluorescent Probes and Labeling Technologies, 10th Edition, Molecular Probes, (2005), Eugene, OR, 9 pages.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Two-photon probe for real-time monitoring of intracellular... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-photon probe for real-time monitoring of intracellular..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-photon probe for real-time monitoring of intracellular... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2631917

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.