ASSAY TEST DEVICE, KIT AND METHOD OF USING

• US 20160231251A1
• Filed: 08/28/2014
• Published: 08/11/2016
• Est. Priority Date: 09/04/2013
• Status: Abandoned Application

• Current Assignee: Credo Biomedical Pte Ltd.
• Original Assignee: Credo Biomedical Pte Ltd.
• Inventors: OU, Chung-Pei, SAGAR, Kaushal, WONG, Winston Jr., KAO, Stephen Chang-Chi, MARQUES, Catia, RAHMAN, Abdur Rub Abdur
• Application Number:
  US14/916,744
• Publication Number:
  US 20160231251A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C12Q 1/686 Polymerase chain reaction [PCR]
• CPC Class Codes: C12Q 1/703 Viruses associated with AIDS
• CPC Class Codes: C12Q 2600/158 Expression markers
• CPC Class Codes: G01N 2021/752 Devices comprising reaction zones
• CPC Class Codes: G01N 21/78 producing a change of colour
• CPC Class Codes: G01N 21/80 Indicating pH value
• CPC Class Codes: G01N 27/4145 specially adapted for biomolecules, e.g. gate electrode with immobilised receptors
• CPC Class Codes: G01N 27/4167 pH electrodes therefor G01N27/302, G01N27/36
• CPC Class Codes: G01N 33/5438 Electrodes
• CPC Class Codes: G01N 33/54388 based on lateral flow
• CPC Class Codes: G01N 33/558 using diffusion or migration of antigen or antibody immunochromatographic test strips G01N33/54387
• CPC Class Codes: G01N 33/84 involving inorganic compounds or pH

Abstract

The present invention relates to assay test devices, and methods and kits for use to monitor, sense, read and display results by using devices with printed electronics, such as batteries, reading devices, and other circuitry and/or using colorimetric means for testing by using a sensitive indicator pH dye, or both.

Claims

1. A medical testing device, said device comprising:

printed electronic circuits, display and battery, a sensor, a monitor, a reading and display unit, wherein at least one of the electronics is printed or wherein said device uses colorimetric media to detect changes in color in measuring chemical or biological reactions.

88. The device according to claim 1, wherein the device is an integrated testing lateral flow device, and wherein the electronics are printed using organic semiconductor materials.

89. The integrated testing lateral flow device according to claim 88, wherein the organic semiconductor materials are poly(3-hexylthiophene), pentacene, polytriarylamine, 5′

,5-bis-(7-dodecyl-9H-fluoren-2-yl)-2,2′

-bithiopene, polyethylene, naphthalate, poly(4,4′

didecylbithiopene-co-2,5-thieno[2,3-b] thiophene, polyaniline or combinations thereof.

90. The integrated testing lateral flow device according to claim 89, wherein the electronics are printed using inorganic materials, and wherein said inorganic materials are tantalum peroxide, silver chloride, silver paste, silicon, silicon dioxide, silicon nitride, aluminum oxide, mineral semiconductors, metals, metal oxides or combinations thereof.

103. A device according to claim 1, wherein the device uses colorimetric media to detect changes in color or to visualize chemical or biological reactions;

wherein the colorimetric medium is a pH sensitive indicator dye; and

wherein the pH sensitive dye is in solution;

immobilized on one or more 3D structure;

immobilized in a reaction chamber or vessel;

or combinations thereof.

104. A method for testing for pH changes, said method comprising:

using the device of claim 103 to measure said pH change.

105. The device according to claim 103, wherein the pH sensitive dye is immobilized on one or more 3D structures;

wherein the pH sensitive dye is immobilized in a reaction chamber or vessel; and

wherein a combination of a pH sensitive dye is immobilized in solution, or one or more 3D structures or in a reaction chamber or vessel.

106. The device according to claim 1, wherein the printed electronics are nanoparticles, nanotubes, graphene or combinations thereof, and wherein the printed electronics are printed by atomic layer deposition, vapour deposition, inject printing, roll-to-roll printing, screen printing or combinations thereof.

107. The device according to claim 1, additionally comprising:

transistor, controlling circuits, signal circuit, display circuit, battery, input and output for data recording and power sourcing.

2-87. -87. (canceled)

91. A diagnostic kit for a device that contains a chromatographic medium, said device comprising:

(i) a sample loading zone located upstream of a detection zone;

(ii) a reporting carrier zone located between the sample loading zone and a detection zone, wherein the reporting carrier zone comprises a reporting carrier capable of forming a complex with an analyte and wherein said device contains said reporting carrier, a carrier and one or more proficient enzyme cassettes; and

(iii) a detection zone, wherein said detection zone contains a capture component for the analyte and an indicator.

92. The kit according to claim 91 additionally comprising:

a sample load zone with test sample;

wherein the test sample travels through the reporting carrier zone along the chromatographic medium from the sample loading zone to the detection zone and beyond the detection zone, a sample load zone with test sample;

wherein the test sample is mixed with the reporting carrier before loading a sample load zone, adding a substrate to the detection zone; and

wherein the substrate undergoes a reaction in the presence of proficient enzyme analyte containing reporting carrier and generating a response of the indicator within the detection zone that corresponds to the presence or absence of the analyte in the test sample.

93. A diagnostic kit to detect the presence of an analyte using an enzyme-aided amplification method in a chromatographic medium, said kit comprising:

an analyte as a biomarker, an entity to recognize said biomarker;

a reporting carrier that has a first entity which binds to the analyte, and a capture component, wherein said biomarker is an antigen, said capture component is a second antibody that binds to the analyte at a different epitope from the first antibody.

94. The diagnostic kit according to claim 93;

wherein the first antibody is covalently cross-lined to A proficient enzyme, wherein the reporting carrier comprises streptavidin and biotinylated proficient enzyme and biotinylated antibody; and

wherein the first antibody is associated with the proficient enzyme through non-covalent Streptavidin-Biotin interaction.

95. The diagnostic kit according to claim 94, wherein the analyte is a sequence of nucleic acids.

96. The diagnostic kit according to claim 95, wherein the reporting carrier comprises a first sequence of nucleic acids which hybridise to one part of the target nucleic acid sequence, and wherein the proficient enzyme which is associated with the first nucleic acid.

97. The diagnostic kit according to claim 96, wherein the first nucleic acid is covalently cross-linked to the proficient enzyme.

98. The diagnostic kit according to claim 97, wherein the reporting carrier comprises:

streptavidin and biotinylated proficient enzyme and biotinylated first nucleic acid, and wherein the first nucleic acid is associated to the proficient enzyme through non-covalent Streptavidin-Biotin interaction.

99. The diagnostic kit of claim 93, wherein the reporting carrier binds to the p24 protein of HIV, HBV, HCV, HPV, or herpes virus;

the nucleic acid or proteins of bacterial proteins for syphilis, chlamydia, gonorhea;

lipoproteins or the nucleic acids thereof;

glycoproteins or the nucleic acids thereof.

100. The diagnostic kit of claim 95, wherein the reporting carrier binds to HIV nucleic acid.

118. The device according to claim 93, comprising:

an indicator dye that is potassium 1-hydroxy-4-[4-(hydroxyethylsulphonyl)-phenylazo]-naphthalene-2-sulphonate or 4-[4-(2-hydroxyethanesulfonyl)-phenylazo]-2,6-dimethoxyphenol or any reactive vinylsulphonyl dye or combinations thereof.

119. The device according to claim 93, wherein the indicator dye is mixed in the reaction reagents.

120. The device according to claim 93, wherein the pH indicator dye is part of the amplification reagent prior to the reaction.

121. The device according to claim 93, wherein the pH indicator dye is added after the reaction.

122. The device according to claim 93, wherein the pH indicator is immobilized to thin particles microparticles, a thin film, or a three-dimensional object.

123. The device according to claim 122, wherein the particles are micro particles made of polymer, porous particles, or core-shell particles;

and wherein the dye is covalently conjugated to the micro-particles, wherein the particles are made of polymer, porous particles or core-shell particles, and wherein one or more particles are viable as discrete particles, combining at least one or more particles.

124. The device according to claim 122, wherein the three dimensional object is under the influence of external magnetic force;

wherein the thin film is a film covalently conjugated with the pH indicator dye; and

wherein the three-dimensional object is made of hydrogel or is coated on the surface of non-hydrogel three-dimensional object of milli or micro meter size.

125. The device according to claim 122, wherein the three-dimensional object is mixed with the non-hydrogel material to increase the mass density to enhance the colour intensity introduction of coloured background from the non-hydrogen material.

126. The device according to claim 122, wherein the three-dimensional object is a collection of small particles that form a cluster of three-dimensional objects under the influence of an external magnetic force.

127. The device according to claim 126, wherein the three-dimensional object is one or more milli particles and wherein the milli particles are moved within the reaction container under the influence of an external magnetic force.

128. The device according to claim 122, wherein the hydrogel is made of Poly(2-hydroxyethyl methacrylate) (PHEMA), Polyurethane (PU), Poly(ethylene glycol) (PEG), polyethylene glycol methacrylate (PEGMA), polyethylene glycol dimethacrylate (PEGDMA), polyethylene glycol diacrylate (PEGDA), Poly (vinyl alcohol) (PVA), Poly(vinyl pyrrolidone) (PVP), or Polyimide (PI), or combinations thereof.

129. The device according to claim 93, wherein one or more indicator dye works as an indicator for the starting pH.

130. The device according to claim 129, wherein one or more pH indicators is used with each pH indicator being subject to a different pKa;

wherein at least two pH indicators are used to give an indication that the starting pH is out of range, wherein the presence of a line or other pattern where no line existed prior to the reaction indicates an observed chemical or biological reaction, and wherein a colorimetric change indicates the observation of chemical or biological reaction.

131. The device according to claim 93, wherein an amplification method is used to carry out the reaction and the method is a thermocycling method or an isothermal method.

132. The method according to claim 131, wherein the thermocycling method is PCR, real-time PCR or reverse transcription PCR, wherein the isothermal method is a Loop-mediated Amplification (LAMP), Strand Displacement Amplification (SDA), Recombinanse Polymerase Amplification (RPA), Nucelic Acid Sequence-Based Amplification (NASBA), Transcription-Mediated Amplification (TMA), SMART (Nucl. Acids Res. 29:

e54,

     2001), Helicase-Dependent Amplification (HDA), Cross Priming Amplification (CPA), Rolling-Circle Amplification (RCA), ramified rolling circle amplification (RAM), Nicking enzyme amplification reaction (NEAR), Nicking Enzyme Mediated Amplification (NEMA, CN100489112 C), Isothermal Chain Amplification (ICA), Exponential Amplification Reaction (EXPAR), Beacon-Assisted Detection Amplification (BAD AMP) Primer Generation-Rolling Circle Amplification (PG-RCA), or other nucleic acid amplification methods, wherein the amplification does not require thermal cycling.

143. The method according to claim 93, wherein the sensitive indicator dye is lyophilised with the amplification reagent;

and wherein at least two pH indicators are used to give an indication that the starting pH is out of range.

144. The method according to claim 143, wherein each sensitive indicator dye works as an indicator for the starting pH.

101. A method for measuring a chemical or biological reaction, said method comprising:

using a printed electronic device containing at least one of the electronics selected from the group circuits, display, battery, sensor, monitor, reading unit, display unit, adding of an analyte;

observing the reaction;

reading the result;

that has a data input and data output mechanism and a power input mechanisim.

102. The method according to claim 101, wherein the device is a lateral flow device or microfluidic device.

108. A device for measuring pH changes, wherein said device comprises:

a printed sensor system containing a test line, a control line and a conjugation pad.

109. The device according to claim 108, further comprising an absorption pad.

110. The device according to claim 108, wherein said device provides Yes/No semi quantitative, or quantitative display;

a line appearance where no line was previously read;

a line appearance on a white background;

the appearance of different pattern;

a color change;

the disappearance of a line;

or combinations thereof.

111. The device according to claim 108, wherein at least one light emitting diode or an array of light emitting diodes with text information related to the assay result is displayed.

112. A medical testing device, said device comprising:

a printed battery, a printed sensor and a communication module to upload information, wherein said communication module uploads information to a base station.

113. An integrated testing lateral flow device comprising a chromatographic medium having a sample loading zone upstream from a detection zone;

a reporting carrier zone;

a detection zone;

wherein the reporting carrier is located between the sample loading zone and the detection zone.

114. The device according to claim 113, wherein the reporting carrier comprises a carrier and one or more proficient enzymes;

wherein the presence or absence of an analyte is detected, by an enzyme-aided amplification method in a chromatographic medium; and

wherein the analyte is a biomarker antigen that is recognized by an antibody.

115. The device according to claim 114, wherein the reporting carrier comprises a first antibody that binds to the analyte and proficient enzyme;

and the capture component comprises a second antibody that binds to the analyte at a different epitope from the first antibody.

116. The device according to claim 115, wherein the reporting carrier is streptovidin, biotinylated proficient enzyme, biotinylated antibody and/or combinations thereof, and wherein the analyte is a nucleic acid sequence.

117. The device according to claim 114, wherein the reporting carrier binds to HIV nucleic acids.

133. A kit to detect nucleic acid amplifications, said kit comprising:

(a) one or more container(s), (b) amplification reagents, and (c) at least one pH indicator, wherein the pH indicator is potassium 1-hydroxyl-4-[4-(hydroxyethyl sulphonyl)-phenylazo]-naphthalene-2-sulphonate or 4-[4-(2-hydroxylethanesulfonyl)-phenylazo]-2,6-dimethoxyphenol or any reactive vinylsulphonyl due or combination thereof.

134. A pH detection device comprising:

a pH sensitive sensor component controlling circuitry for calculating signal strength and display pixel components, wherein said components are printed on dielectric materials, wherein the dielectric material is flexible plastic.

135. A device for detecting colorimetric changes in a chemical or biological sample, said device comprising:

a. at least two photo conductors electronically printed on electrodes;

b. an organic film covering one of the photoconductor, wherein the one film covering one of the photoconductors is acting as a control and does not interact with a test medium;

c. a pH measuring device that detects color change of the other photoconductor;

d. a battery; and

e. data and power input and output.

136. The device according to claim 135, wherein an organic material used as the film is polyalanine and wherein a pH change is reflected as a color change.

137. A device for measuring a pH change by using printed electronics that measures conductivety according to a pH change, said device comprising:

a. a compartment or layer wherein at least two electrodes are placed and wherein the electrodes are printed electrodes and wherein a substrate or analyte is placed;

b. a second compartment or layer thereafter that contains printed pH sensing materials; and

c. a third compartment or layer that has insulation to cause a barrier between the printed electrodes and the substrate or analyte.

138. The device according to claim 137, additionally comprising a divider circuit to record a resistance into a measurable voltage, wherein the voltage change is displayed electrophoretically and/or electrochromatically.

139. A method for sensing a chemical and/or biological reaction, said method comprising:

a. detecting an electrical signal output;

b. monitoring the electrical signal when the pH changes in the chemical and/or biological reaction;

wherein at least one of the detection and monitoring components for electronically detection of the reaction is on a substance.

140. The method according to claim 139, wherein the detection of said chemical and/or biological reaction is in a single zone;

using differential output;

or measuring pH at different time points during the reaction, wherein the reaction is a PCR reaction, real-time PCR or revise transcription PCR, and wherein the reaction is a colorimetric reaction.

141. The method according to claim 139, wherein the reaction is an isothermal reaction.

142. The method according to claim 141, wherein the isothermal reaction is a single stranded displacement amplification (SDA), DNA amplification, RNA amplification, or combinations thereof.

145. The method according to claim 140, wherein the isothermal method of a Loop-mediated Amplification (LAMO), Strand Displacement Amplification (SDA), Recombinase Polymerase Amplification (RPA), Nucleic Acid Sequence-Based Amplification (NASBA), Transcription-Mediated Amplification (TMA), SMART (Nucl. Acids Res. 29:

e54,

     2001), Helicase-Dependent Amplification (HDA), Cross Priming Amplification (CPA), Rolling-Circle Amplification (RCA), ramified rolling circle amplification (RAM), Nicking enzyme amplification reaction (NEAR), Nicking Enzyme Mediated Amplification (NEMA, CNio0489112 C), Isothermal Chain Amplification (ICA), Exponential Amplification Reaction (EXPAR), Beacon-Assisted Detection Amplification (BAD AMP), Primer Generation-Rolling Circle Amplification (PG-RCA), or other nucleic acid amplification methods, wherein the amplification does not require thermal cycling.