System for portable and easy-to-use detection of analytes with mobile computing device
This system takes in raw cellular material collected using a provided swab, blood collection device, urine collection device, or other sample collection device and transforms that biological material into a digital result, identifying the presence, absence and/or quantity of nucleic acids, proteins, and/or other molecules of interest.
1. A system for identifying a presence, absence, and/or quantity of a molecule of interest in a sample, the system comprising:
a cartridge comprising:
a first reservoir that receives the sample collected by a sample collection device to form a fluid mixture therein, the fluid mixture comprising the sample and signaling enzymes,
a second reservoir that holds a fluid comprising chemical substrates,
an analysis channel configured to receive the fluid mixture from the first reservoir and the fluid from the second reservoir, and
an electrochemical sensor disposed within the analysis channel to be exposed to the fluid mixture and then to the fluid, the electrochemical sensor configured to sense electrons upon mixing of the signaling enzymes localized over the electrochemical sensor from the fluid mixture and the chemical substrates from the fluid, the sensed electrons indicative of the presence, absence, and/or quantity of the molecule of interest in the sample; and
a reader configured to receive the cartridge, the reader comprising:
a pressure sensor configured to be operatively coupled to the first reservoir when the cartridge is inserted into the reader, the pressure sensor configured to sense a flex in the first reservoir due to insertion of the sample collection device into the cartridge and generate a pressure signal, the reader configured to begin a testing protocol in response to the pressure signal.
2. The system of claim 1 , wherein the electrochemical sensor comprises a thiolated ethylene glycol surface.
3. The system of claim 1 , wherein the electrochemical sensor comprises a surface backfilled with mercaptoundecanoic acid.
4. The system of claim 1 , wherein the signaling enzymes comprise horseradish peroxidase.
5. The system of claim 1 , wherein the chemical substrates comprise Tetramethylbenzidine.
6. The system of claim 1 , wherein the electrochemical sensor comprises a working electrode, a counter electrode, and a reference electrode.
7. The system of claim 1 , wherein the signaling enzymes are comprised within magnetic particle complexes.
8. The system of claim 1 , further comprising the reader that is configured to be electrically coupled to the cartridge, the reader configured to receive signals from the cartridge indicative of the presence, absence, and/or quantity of the molecule of interest in the sample.
9. The system of claim 8 , further comprising software that runs on the mobile device, the software configured to receive information related to the presence, absence, and/or quantity of the molecule of interest in the sample communicated from the reader.
10. The system of claim 8 , further comprising the sample collection device.
11. The system of claim 1 , wherein the cartridge further comprises a sonically conducting medium disposed below the first reservoir, and wherein the reader further comprises a sonicator configured to contact the sonically conducting medium when the cartridge is inserted into the reader, the sonicator configured to generated sonic waves and the sonically conducting medium configured to communicate the sonic waves to the first reservoir via the sonically conducting medium.