Systems and Methods for Evaluating Enzyme Competency

• US 20090005270A1
• Filed: 09/20/2005
• Published: 01/01/2009
• Est. Priority Date: 09/20/2004
• Status: Abandoned Application

• Current Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Original Assignee: University of Florida Research Foundation, Incorporated (State University System of Florida)
• Inventors: Prokai, Laszlo, Melker, Richard J., Dennis, Donn M., Morey, Timothy E.
• Application Number:
  US11/578,323
• Publication Number:
  US 20090005270A1
• Time in Patent Office: Days
• US Class Current: 506/39
• CPC Class Codes: C12Q 1/00 Measuring or testing processes involving enzymes, nucleic acids or microorganisms measuring or testing apparatus with condition measuring or sensing means, e.g. colony counters, C12M1/34; Compositions therefor; Processes of preparing such compositions
• CPC Class Codes: C12Q 1/26 involving oxidoreductase

Abstract

The present invention provides systems and methods for determining enzymatic competency, which is important in determining whether a patient may suffer an adverse drug reaction, has a disease associated with defects in specific enzymatic function, and/or has an enzyme defect that is likely to cause pathophysiology. As contemplated herein, a parent molecular entity is administered to a patient in whom enzymatic competency is to be determined. A sample of the patient'"'"'s bodily fluid is exposed to a sensor of the invention to distinguish, detect, and quantify a detectable entity in the bodily fluid. Sensor-acquired data regarding the detectable entity is used to determine enzymatic competency. Preferably, a sample of a patient'"'"'s exhaled breath is collected and exposed to the sensor of the invention. Types of sensor systems of the invention include, but are not limited to, surface resonance arrays; microelectromechanical sensors (such as microcantilever-based technology); molecularly imprinted polymer sensors; amplifying fluorescent sensor technology; aptamer-based sensor technology; SAW sensors; infrared sensors; fuel cells; chemical reactors; and pH sensitive sensors.

Claims

1. A method for real-time, point of care determination of enzymatic system competency, the method comprising the steps of:

a) administering at least one parent molecular entity to a patient for whom competency for at least one enzymatic system is to be determined, wherein at least one target marker is generated from said at least one parent molecular entity;

c) exposing a sensor to a bodily fluid from the patient, wherein said sensor can distinguish, detect, and quantify the target marker in the bodily fluid; and

d) based on the presence of the target marker, establishing whether the patient exhibits competency for the at least one enzymatic system.

2. The method of claim 1, wherein the target marker is volatile.

3. The method of claim 1, wherein the parent molecular entity is a substrate for the at least on enzymatic system, wherein the parent molecular entity is selected from the group consisting of:

an FDA approved drug;

a GRAS compound; and

a new chemical entity.

4. The method of claim 1, wherein the bodily fluid is selected from the group consisting of exhaled breath, whole blood, blood plasma, urine, semen, saliva, lymph fluid, meningeal fluid, amniotic fluid, glandular fluid, sputum, feces, sweat, mucous, vaginal fluid, ocular humors, and cerebrospinal fluid.

5. The method of claim 4, wherein the bodily fluid is exhaled breath.

6. The method of claim 1, wherein the sensor is selected from the group consisting of:

metal-insulator-metal ensemble (MIME) sensors, cross-reactive optical microsensor arrays, fluorescent polymer films, surface enhanced raman spectroscopy (SERS), diode lasers, selected ion flow tubes, metal oxide sensors (MOS), bulk acoustic wave (BAW) sensors, colorimetric tubes, infrared spectroscopy, gas chromatography, semiconductive gas sensor technology;

mass spectrometers, fluorescent spectrophotometers, conductive polymer gas sensor technology;

aptamer sensor technology;

amplifying fluorescent polymer (AFP) sensor technology;

microcantilever technology;

molecularly polymeric film technology;

surface resonance arrays;

microgravimetric sensors;

thickness sheer mode sensors;

or surface acoustic wave gas sensor technology.

7. The method of claim 1, wherein the enzymatic system is the cytochrome P450 system.

8. The method of claim 7, wherein enzymatic system is the cytochrome P450 3A4 system, wherein the parent molecular entity is an analogue of verapamil, and wherein the target marker is a metabolite of verapamil.

9. The method of claim 8, wherein the analogue of veraparnil is N-(2,2,2-trifluoroethyl)norverapamil.

10. The method of claim 7, wherein enzymatic system is the cytochrome P450 2D6 system, wherein the parent molecular entity is an analogue of dextromethorphan, and wherein the target marker is a metabolite of dextromethorphan.

11. The method of claim 10, wherein the analogue of dextromethorphan is O-(2,2,2-trifluoroethyl)-N-methylmorphinan.

12. The method of claim 1, further comprising the step of determining whether the patient will suffer an adverse drug reaction based on the competency of the at least one enzymatic system.

13. The method of claim 1, further comprising the step of establishing a first fingerprint for competent activity of the at least one enzymatic system, assessing the concentration of the target marker in the bodily fluid sample over time to establish a second fingerprint, and determining whether the patient has a disease based on the comparison of the first fingerprint to the second fingerprint.

14. The method of claim 1, further comprising the step of determining whether the patient will exhibit pathophysiology based on the competency of the at least one enzymatic system.

15. The method of claim 1, wherein the parent molecular entity is administered using a route selected from the group consisting of:

sublingual;

gastrointestinal;

vaginal;

intravenous;

subcutaneous;

transdermal;

intramuscular;

topically;

nasal; and

pulmonary.

16. The method of claim 1, further comprising the step of constructing an individualized total care plan for the patient based on the competency of the at least one enzymatic system.

17. The method of claim 1, wherein more than one parent molecular entity is administered to the patient;

and further comprising the step of prescribing beneficial dosages for more than one drug based on the competency of the enzymatic system.

18. A system for real-time, point of care determination of enzymatic system competency, said system comprising:

a) at least one parent molecular entity, wherein at least one target marker is generated from the at least one parent molecular entity;

b) a sensor for detecting said target marker; and

c) a processor configured to store and analyze information provided by the sensor.

19. The system of claim 18, wherein the processor is also configured to store a fingerprint representative of at least one normal enzymatic function;

to determine a sample fingerprint based on the data provided by the sensor; and

to compare the representative fingerprint against the sample fingerprint.

20. The system of claim 18, wherein the parent molecular entity is a substrate for the at least on enzymatic system, wherein the parent molecular entity is selected from the group consisting of:

an FDA approved drug;

a GRAS compound; and

a new chemical entity.

21. The system of claim 18, wherein the sensor is selected from the group consisting of:

metal-insulator-metal ensemble (MIME) sensors, cross-reactive optical microsensor arrays, fluorescent polymer films, surface enhanced raman spectroscopy (SERS), diode lasers, selected ion flow tubes, metal oxide sensors (MOS), bulk acoustic wave (BAW) sensors, colorimetric tubes, infrared spectroscopy, gas chromatography, semiconductive gas sensor technology;

mass spectrometers, fluorescent spectrophotometers, conductive polymer gas sensor technology;

aptamer sensor technology;

amplifying fluorescent polymer (AFP) sensor technology;

microcantilever technology;

molecularly imprinted polymeric film technology;

microgravimetric sensors;

surface resonance arrays;

thickness sheer mode sensors;

or surface acoustic wave gas sensor technology.

22. The system of claim 18, wherein the sample fingerprint is based on data regarding the cytochrome P450 system.

23. The system of claim 22, wherein enzymatic system is the cytochrome P450 3A4 system, wherein the parent molecular entity is an analogue of verapamil, and wherein the target marker is a metabolite of verapamil.

25. The system of claim 22, wherein enzymatic system is the cytochrome P450 2D6 system, wherein the parent molecular entity is an analogue of dextromethorphan, and wherein the target marker is a metabolite of dextromethorphan.

26. The system of claim 25, wherein the analogue of dextromethorphan is O-(2,2,2-trifluoroethyl)-N-methylmorphinan.

24. The system of claim 24, wherein the analogue of verapamil is N-(2,2,2-trifluoroethyl)norverapamil.

27. A kit for point-of-care assessment of a patient'"'"'s enzymatic competency to at least one parent molecular entity, said kit comprising:

a) a sample of said parent molecular entity, from which at least one target marker is generated; and

b) at least one sensor.

28. The kit of claim 27, wherein the sensor comprises a communication means that enables communication between the sensor and a processor.

29. The kit of claim 28, further comprising software that is applied to the processor for use in analyzing information provided by the sensor.

30. The kit of claim 27, wherein the sensor is selected from the group consisting of:

metal-insulator-metal ensemble (MIME) sensors, cross-reactive optical microsensor arrays, fluorescent polymer films, surface enhanced raman spectroscopy (SERS), diode lasers, selected ion flow tubes, metal oxide sensors (MOS), bulk acoustic wave (BAW) sensors, colorimetric tubes, infrared spectroscopy, gas chromatography, semiconductive gas sensor technology;

mass spectrometers, fluorescent spectrophotometers, conductive polymer gas sensor technology;

aptamer sensor technology;

amplifying fluorescent polymer (AFP) sensor technology;

microcantilever technology;

molecularly imprinted polymeric film technology;

surface resonance arrays;

microgravimetric sensors;

thickness sheer mode sensors;

or surface acoustic wave gas sensor technology.

31. The kit of claim 27, wherein the parent molecular entity is a substrate for an enzymatic system of interest, wherein the parent molecular entity is selected from the group consisting of:

an FDA approved drug;

a GRAS compound; and

a new chemical entity.

32. The kit of claim 27, wherein the enzymatic system is the cytochrome 450 system.

33. The kit of claim 32, wherein enzymatic system is the cytochrome P450 3A4 system, wherein the parent molecular entity is an analogue of verapamil, and wherein the target marker is a metabolite of verapamil.

34. The kit of claim 33, wherein the analogue of verapamil is N-(2,2,2-trifluoroethyl)norverapamil.

35. The kit of claim 32, wherein enzymatic system is the cytochrome P450 2D6 system, wherein the parent molecular entity is an analogue of dextromethorphan, and wherein the target marker is a metabolite of dextromethorphan.

36. The kit of claim 35, wherein the analogue of dextromethorphan is O-(2,2,2-trifluoroethyl)-N-methylmorphinan.

37. A method for assessing potential patient organ suitability for transplantation comprising:

a) administering at least one parent molecular entity to a patient for whom competency for at least one enzymatic system in an organ is to be determined, wherein at least one target marker is generated from said at least one parent molecular entity;

c) exposing a sensor to a bodily fluid from the patient, wherein said sensor can distinguish, detect, and quantify the target marker in the bodily fluid; and

d) based on the presence of the target marker, establishing whether the patient exhibits competency for the at least one enzymatic system and whether the organ is suitable for transplantation.

38. A method for in vitro assessment of enzyme function comprising:

a) administering in a closed container at least one parent molecular entity to a sample comprising at least one enzyme, wherein activity for the at least one enzyme is to be determined, wherein at least one target marker is generated from said at least one parent molecular entity, and wherein the closed container comprises a headspace;

c) exposing a sensor to the headspace, wherein said sensor can distinguish, detect, and quantify the target marker in the headspace; and

d) based on the presence of the target marker, establishing whether the at least one enzyme is active.