Procedure for the determination of fragmentation of DNA in...

Chemistry: molecular biology and microbiology – Measuring or testing process involving enzymes or... – Involving nucleic acid

Reexamination Certificate

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C536S022100

Reexamination Certificate

active

07993827

ABSTRACT:
The present invention describes a method for the determination of DNA fragmentation in animal sperm. It particularly refers to a procedure to evaluate the integrity of the chromatin/DNA of the sperm by means of a treatment of the sample with a denaturing solution followed, optionally by a stain; a subsequent treatment with a lysis solution that does not contain a protein denaturing detergent, followed, optionally, by a stain; and an evaluation of the integrity of the chromatin/DNA. The present invention also refers to a Kit to evaluate the quality of the sperm of animals which includes a DNA denaturing solution and a lysis solution that does not contain a protein denaturing detergent.

REFERENCES:
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Fernandez et al., “The Sperm Chromatin Dispersion Test: A Simple Method for the Determination of Sperm DNA Fragmentation,” J. Androl, Jan./Feb. 2003, vol. 24, No. 1, pp. 59-66.
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Spano, M et al. Nuclear chromatin variations in human spermatozoa undergoing swim-up and cryopreservation evaluated by the flow cytometric sperm chromatin structure assay. Molecular Human Reproduction, vol. 5, No. 1, pp. 29-37, 1999.
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Fernandez, J.L. et al. The sperm chromatin dispersion test: a simple method for the determination of sperm DNA fragmentstion. J. Andrology, vol. 24, No. 1, pp. 59-66, 2003.
Bezanehtak, H. et al. Study of demembranated, reactivated human spermatozoa with decondensed nuclei. J. Exp. Zool., vol. 284(7), pp. 789-797, 1999.
Richthoff, J. et al. The impact of testicular and accessory sex gland function on sperm chromatin integrity as assessed by the sperm chromatin structure assay (SCSA). Human Reproduction, vol. 17, No. 12, pp. 3162-3169, 2002.

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