PCR amplification reaction apparatus and method for PCR amplification reaction using apparatus
The present invention provides a method for PCR amplification reaction that can reduce the time required for amplification reaction of nucleic acid by PCR using the target nucleotide molecule as a template, and an apparatus used for the method. The method comprises using a PCR reaction vessel in which a heater for local heating, which can thermally contact with a solution storing section with an extremely small capacity for storing a PCR reaction solution and a reaction solution stored in the solution storing section directly, is placed; feeding a pulsed current to the placed heater; and carrying out a thermal cycle of PCR reaction, so that high-speed PCR amplification reaction can be carried out.
1. A method for PCR amplification reaction comprising the steps of:
preparing a reaction vessel in which a heater is placed at a position to come into direct contact with a reaction solution containing a nucleic acid chain;
preparing a heating block in which the reaction vessel is held;
maintaining the heating block at a temperature corresponding to an annealing phase;
setting the reaction solution into the reaction vessel; and
applying a row of pulsed current to the heater during a denaturing phase for producing pulsed heating corresponding to a pulse time width and a pulse current height of the row of pulsed current to directly heat the reaction solution with the pulsed heating,
wherein the heater is a coiled heater and is placed in the reaction vessel.
2. The method for PCR amplification reaction according to claim 1 , wherein the reaction solution is stored in a solution storing section of the reaction vessel, at a designed storing capacity of the solution storing section, and wherein the storing capacity of the solution storing section and a shape of the solution storing section are designed in order to exhibit a heat capacity in which the temperature of the reaction solution can respond to a thermal pulse generated by applying a predetermined row of pulsed current to the heater in the order of at least 0.01 second.
3. The method for PCR amplification reaction according to claim 1 , wherein application of the row of pulsed current is repeated a plurality of times periodically and the pulsed heating is correspondingly repeated a plurality of times.
4. A method for PCR amplification reaction comprising the steps of:
preparing a reaction vessel in which a heater is placed at a position to come into direct contact with a reaction solution containing a nucleic acid chain;
setting the reaction solution into the reaction vessel;
preparing a heating block in which the reaction vessel is held;
maintaining the heating block at a temperature corresponding to an annealing phase; and
applying a row of pulsed current to the heater during a denaturing phase for producing pulsed heating corresponding to a pulse time width and a pulse current height of the row of pulsed current to directly heat the reaction solution with the pulsed heating,
wherein the heater is a film and is placed in an inner surface of the reaction vessel.
5. The method for PCR amplification reaction according to claim 4 , wherein the reaction solution is stored in a solution storing section of the reaction vessel, at a designed storing capacity of the solution storing section, and wherein the storing capacity of the solution storing section and a shape of the solution storing section are designed in order to exhibit a heat capacity in which the temperature of the reaction solution can respond to a thermal pulse generated by applying a predetermined row of pulsed current to the heater in the order of at least 0.01 second.
6. The method for PCR amplification reaction according to claim 4 , wherein application of the row of pulsed current is repeated a plurality of times periodically and the pulsed heating is correspondingly repeated a plurality of times.