Process for Ensuring Consistency and Reproducibility of a Diagnostic or Research Method
A method is disclosed in which control processes are used to maintain consistency across a research or diagnostic series of steps. Some embodiments of the processes include the use of fresh or lyophilized cell lines, beads, surface or other markers. The use of quality control processes is intended to monitor data from the underlying methods in order to detect unacceptable variations and to allow for exclusion or normalization. Overlapping control processes allows for tighter control and for redundancy in the monitoring.
1 . A functional, quality control method for flow cytometry or mass spectrometry, comprising the steps of:
(a). Providing a microtiter plate;
(b). Distributing sample cells into wells of the microtiter plate;
(c). Distributing standard cells into wells of the microtiter plate;
(d). Distributing rainbow control particles (RCPs) into wells of the microtiter plate;
(e). Contacting the standard cells and sample cells with at least one modulator;
(f). Measuring one or more activatable elements and one or more surface markers in the standard cells by flow cytometry or mass spectrometry to create standard cell data;
(g). Measuring two activatable elements in the sample cells by flow cytometry or mass spectrometry to create test data;
(h). Measuring RCPs by flow cytometry or mass spectrometry to create RCP data;
(i). Comparing the standard cell data and RCP data to a preset range of acceptable values; and
(j). Normalizing or excluding the test data when the standard cell data or the RCP data is not within the preset range of acceptable values.
2 . A functional, quality control method, for use in flow cytometry or mass spectrometry comprising the steps of:
(a). Measuring at least two activatable elements in standard cells to create standard cell data;
(b). Comparing the standard cell data to a preset range of acceptable values;
(c). Measuring at least two activatable elements in sample cells to create test data; and
(d). Excluding or normalizing test data when the standard cell data is not within the preset range of acceptable values.
3 . The method of claim 2 , further comprising the steps of:
(a). Providing at least one microtiter plate;
(b). Distributing live, sample and standard cells into wells of the microtiter plate;
(c). Measuring at least two activatable elements in the standard cells to create standard cell data;
(d). Measuring at least two activatable elements in the sample cells; and
(e). Excluding or normalizing test data when the standard cell data is within the preset range.
4 . The method of claim 1 , further comprising the steps of:
(a). Permeabilizing the cells with methanol using an instrument which has been prepared so that it dispenses an exact amount of methanol and has been charged with air or methanol when not in use; and
(b). Measuring at least two activatable elements using a flow cytometer.
5 . The method in accordance with claim 2 , wherein one or more processors executing computer readable code is used to execute a plurality of instructions to compare the standard cell data to a preset range of acceptable values.
6 . The method in accordance with claim 2 , wherein the standard cells are stable cell lines.
7 . The method in accordance with claim 6 , wherein the standard cells are stable cell lines GDM-1 or RS;411.
8 . The method in accordance with claim 2 , wherein the standard cells are measured prior to measuring each microtiter plate of the sample cells.
9 . The method in accordance with claim 2 , wherein the process used to measure the activatable elements in the standard cells and the sample cells comprises permeabilizing the cells with methanol with an instrument which has been prepared so that it dispenses an exact amount of methanol and has been charged with air or methanol when not in use.
10 . The method in accordance with claim 9 , wherein the instrument has a plurality of dispensing heads that dispense methanol into wells of microtiter plates and the dispensing heads have been charged with methanol using a bleeder valve.
11 . The method in accordance with claim 9 , further comprising adding beads to the wells containing the sample cells.
12 . The method in accordance with claim 11 , wherein the beads are used to normalize data across multiple wells.
13 . The method in accordance with claim 1 , wherein the RCPs are used in wells that have sample cells.
14 . The method in accordance with claim 2 , wherein the test data is adjusted based on normalization values.
15 . The method in accordance with claim 2 , further comprising providing a plurality of quality controls including the addition of beads, addition of stable cell lines, addition of stain controls, and the monitoring of cell surface or intracellular markers.
16 . The method in accordance with claim 1 , further comprising associating each step with the time it was performed.
17 . The method in accordance with claim 2 , further comprising placing quality control data into a database.
18 . A kit to perform the method of claim 2 , comprising two or more reagents, compounds or other devices selected from the group of: live cell lines, lyophilized cells, RCPs; and
three or more reagents selected from the group consisting of: antibodies directed to cell surface markers, antibodies directed to internal cell markers, modulators, buffers, fixatives, binding elements, and permeabilizers.
19 . A kit to measure antibody addition in the method of claim 18 further comprising a cytometric capture array, buffers and reagents.
20 . The method in accordance with claim 1 , further comprising adding a cytometric bead array in the wells of the microtiter plate to measure modulators and antibodies.
21 . The method in accordance with claim 2 , wherein the standard cells are from healthy controls.
22 . The method in accordance with claim 2 , further comprising determining the cause of any results that not within acceptable values.
23 . A functional, quality control method for use when analyzing samples with flow cytometry or mass spectrometry, comprising the steps of:
(a). Providing a holder having wells;
(b). Distributing sample cells into wells;
(c). Adding one or more reagents to wells, the reagents produce a consistent result under the same conditions used for the sample cells, the reagents include one or more of: standard cells, rainbow control particles (RCPs), and surface marker detection compounds;
(d). Contacting the sample cells and reagents with at least one modulator;
(e). Processing the reagents to obtain quality control data;
(f). Measuring at least two activatable elements in the sample cells to create test data;
(g). Comparing the quality control data to a preset range of acceptable values; and
(h). Analyzing the test data when the quality control data is within a preset range.