Sanko Junyaku Co., Ltd.

Mari Mitsuka

Mitsugu Usui

Chikako Hakii

There is provided a method for forming a self-assembly substance using oligonucleotides without using special instruments or complicated procedures, an self-assembly substance formed by the method for forming the self-assembly substance, and a method for detecting an amplified target gene at a low cost and in a simple way by making use of the method for forming the self-assembly substance. In the method for forming the self-assembly substance using a self-assembly reaction of oligonucleotides, the oligonucleotides comprise oligonucleotides synthesized by a gene amplification reaction. The oligonucleotides synthesized by the gene amplification reaction are detected by forming a self-assembly substance by the use of the method for forming the self-assembly substance of oligonucleotides, and by detecting the formed self-assembly substance.

Method for forming self-assembly substance using oligonucleotide synthesized by gene amplification reaction, self-assembly substance and method for detecting gene

The present invention provides a novel method for forming a self-assembly substance of probes making it possible to shorten a reaction time required for formation of a self-assembly substance and also to increase regions of probes available for detection of a target gene by previously preparing a plurality of dimer-probes and increasing the types. This method comprises the steps of: providing plural groups, wherein each group includes a pair of dimer forming probes containing a pair of oligonucleotides, each oligonucleotide having three regions of a 3' side region, a mid-region and a 5&#x2032; side region, in which the mid-regions of the oligonucleotides have base sequences complementary to each other, and the 3&#x2032; side regions and the 5&#x2032; side regions of the oligonucleotides have base sequences not complementary to each other; hybridizing a plurality of pairs of the dimer forming probes of the plural groups; and forming a double-stranded self-assembly substance by self-assembly of the oligonucleotides.

Methods of constructing self-assembly of probes and method of detecting the same

The present invention provides a method for measuring a target gene under isothermal conditions without using enzyme. A pair of probes each having n (n&#x2267;3) base sequence regions complementary to each other are hybridized alternately to form a double-stranded probe-polymer. A base pair at branched sites of each complementary base sequence region is designed to be a G (guanine)-C (cytosine) bond, whereby a stable double-stranded probe-polymer is formed. One of complementary portions in one probe is constituted to have a base sequence complementary to a part of a target gene, whereby a target gene-probe-polymer complex is formed and the target gene is measured.

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Kashiwa, Japan

Mari Mitsuka