Specific binding analysis device

• US 7,537,731 B2
• Filed: 10/16/2002
• Issued: 05/26/2009
• Est. Priority Date: 10/19/2001
• Status: Active Grant

• Current Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Kawamura, Tatsurou
• Primary Examiner(s): McKelvey; Terry A.
• Assistant Examiner(s): Davis; Deborah A.
• Application Number:
  US10/272,575
• Publication Number:
  US 20030077673A1
• Time in Patent Office: 2,414 Days
• Field of Search: 422/105, 422/55, 422/56, 422/58, 422/104, 435/287.7, 435/287.8, 435/288.3
• US Class Current: 422/68.1
• CPC Class Codes: G01N 33/54393 Improving reaction conditions or stability, e.g. by coating or irradiation of surface, by reduction of non-specific binding, by promotion of specific binding

Abstract

Disclosed is a specific binding analysis method capable of controlling the amount of specific binding to freely setting the sensitivity, concentration range and the like in an analysis, and a device used therefor. In order to optimize the amount of specific binding, the specific binding analysis method and the device used therefor restrain the amount and velocity of a sample passing, by capillarity, through a detection zone, by controlling the dimensions, ventilation resistance, hydrophilicity and the like in the portion of the device where the sample passes through.

Claims

1. A specific binding analysis device for performing a qualitative or quantitative analysis of an analyte contained in a sample, said device comprising:

a first glass capillary tube having;

first and second open ends,

a first cavity that includes a detection zone in which a specific binding substance capable of binding an analyte is immobilized, and

wherein said first open end serves as an opening portion for applying a sample containing said analyte; and

a second glass capillary tube having;

first and second open ends,

a second cavity, and

wherein said second glass capillary tube has a smaller cross-sectional area than said first glass capillary tube; and

wherein said second glass capillary tube is inserted into said second end of said first glass capillary tube and an outer surface of said second glass capillary tube is hermetically bonded to an inner surface of said first glass capillary tube; and

wherein said sample applied to said opening portion moves, by capillarity, to said detection zone in said first cavity to cause a specific binding reaction, and a signal attributed to said specific binding reaction is detected to perform a qualitative or quantitative analysis.

2. The specific binding analysis device of claim 1, wherein the first cavity has a uniform inside diameter.

3. The specific binding analysis device of claim 1, wherein the signal is a coloration, fluorescence, or luminescence.

4. The specific binding analysis device of claim 1, wherein the specific binding substance is an antibody.

5. The specific binding analysis device of claim 1, wherein a blocking agent for inhibiting absorption of the analyte onto the inner surface of the first capillary tube is applied to an area of the inner surface other than said detection zone.

6. A specific binding analysis device for performing a qualitative or quantitative analysis of an analyte contained in a sample, the device comprising:

a first glass capillary tube of uniform inside diameter that includes;

a first end for receiving a sample,

a second end having an outside surface of a second glass capillary tube hermetically bonded to an inside surface of the first glass capillary tube, and

a detection zone having a binding substance immobilized on the inside surface of the first glass capillary tube and capable of binding to the analyte of said sample;

wherein the sample applied to the first end of the first glass capillary tube moves by capillarity to the detection zone to cause a specific binding reaction, and wherein a signal attributed to the specific binding reaction is detected to perform a qualitative or quantitative analysis.