LAMP ASSAY DEVICE

Abstract

The present invention provides a LAMP assay device comprising a heating chamber (5) adapted to receive a support rail (2) of at least one sample, in which the support rail (2) is inserted into it through a sample insertion opening (1), in addition, the heating chamber (5) comprises: at least one internal heating element (8a, 8b); a circuit of light-emitting elements (6) positioned on a front or rear wall; and a light sensor circuit (7) on a wall opposite the light emitting element circuit (6).

Claims

1. LAMP assay device, characterized by the fact that it comprises a heating chamber (5) adapted to receive a support rail (2) of at least one sample, in which the support rail (2) is inserted into it through a sample insertion opening (1), in which the heating chamber (5) comprises: at least one internal heating element (8a, 8b); a circuit of light-emitting elements (6) positioned on a front or rear wall; and a circuit of light sensors (7) on a wall opposite the circuit of light emitting elements (6).

2. Device according to claim 1, characterized by the fact that each light-emitting element (6) and each light-sensing element (7) are positioned at opposite points with respect to each sample inside the heating chamber (5).

3. Device according to claim 1 or 2, characterized in that it comprises a base (3) and an upper cover (4), in which the heating chamber (5) is positioned on the base (3).

4. Device according to any one of claims 1 to 3, characterized in that the sample insertion opening (1) is positioned on a side wall of the device.

5. Device according to any one of claims 1 to 4, characterized in that the support rail (2) of at least one sample comprises a side wall (10) at its outer end adapted to close the insertion opening (1) of samples.

6. Device according to any one of claims 1 to 5, characterized in that the heating chamber (5) comprises at least two heating elements (8a, 8b) positioned inside it, wherein at least one heating element lower heating (8b) is positioned in a lower portion of the heating chamber (5), and at least one upper heating element (8a) is positioned in an upper portion of the heating chamber (5), where the heating elements (8a, 8b) are of the resistive type, and wherein the at least one upper heating element (8a) comprises a heating circuit with greater calorific value, and the at least one lower heating element (8b) comprises a heating circuit with less calorific value.

7. Device according to any one of claims 1 to 6, characterized in that the heating chamber (5) comprises a temperature sensor positioned inside it.

8. Device according to any one of claims 1 to 7, characterized by the fact that it comprises at least one of: a visualization display; a means of communication with electronic devices; a user interface; an electrical power source, and at least one trigger button.

9. Device according to any one of claims 1 to 8, characterized in that it comprises a real-time control system that is in communication with at least one of: at least one heating element (8a, 8b); the circuit of light emitting elements (6); the light sensor circuit (7); the temperature sensor; the visualization display; the means of communication with electronic devices; the user interface; the electrical power source; and at least one trigger button.

10. Device according to claim 9, characterized in that the real-time control system is based on the thermal inertia of the at least one heating element (8a, 8b) of the heating chamber (5).

Description

BRIEF DESCRIPTION OF THE FIGURES

[0027] This detailed description makes reference to the attached figures and their respective reference numbers.

[0028] FIG. 1 illustrates a perspective view of an optional configuration of the LAMP assay device of the present invention.

[0029] FIG. 2 illustrates a disassembled view of the LAMP assay device shown in FIG. 1.

[0030] FIG. 3 illustrates a front view of the optional configuration of the LAMP assay device shown in FIG. 1.

[0031] FIG. 4 illustrates the section AA shown in FIG. 3.

[0032] FIG. 5 illustrates the BB section shown in FIG. 3.

[0033] FIG. 6 illustrates an isolated and exploded view of the heating chamber according to an optional configuration of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0034] Preliminarily, it is emphasized that the description that follows will start from a preferred embodiment of the invention. As will be clear to any person skilled in the subject, however, the invention is not limited to that particular embodiment.

[0035] As previously mentioned, the objective of the present invention is to provide a low cost and practical use LAMP assay device. Thus, the LAMP assay device described below aims to amplify the DNA/cDNA to detect diseases by heating a resistive system, where the control performed is based on the thermal inertia of the resistive elements allocated inside the device.

[0036] The LAMP assay device, in general, comprises integrated circuits directly in its structure that allow the realization of the thermal control and detection of the color change of the samples. The detection set consists of light emitters and detectors that monitor the color change of the samples evaluated during the assay, recording the moment when the color change occurs in the case of a positive reaction.

[0037] The main cost reduction and differential of this device is the exclusive use of thermal inertia for temperature control, which differs from the invention of commercial systems that use removal and/or cooling techniques to control temperature, increasing equipment costs, as well as your energy consumption.

[0038] The advantages described above will be more evident from the description of the figures that follows.

[0039] FIG. 1 illustrates a perspective view of an optional configuration of the LAMP assay device of the present invention. It is observed that the LAMP assay device comprises a sample insertion opening 1, preferably positioned on a side wall of the device.

[0040] FIG. 2 shows a disassembled view of the LAMP assay device shown in FIG. 1. In this optional configuration, the device comprises a base 3, an upper cover 4 and a support rail 2 of at least one sample. In order to facilitate the description, the support rail 2 of at least one sample will be referred to simply as the support rail 2.

[0041] The device further comprises a heating chamber 5, in which the support rail 2 is inserted into it through the sample insertion opening 1. In addition, at least one integrated circuit board can be attached directly to the base frame 3.

[0042] The integrated circuit is adapted to perform the thermal control and the detection of the color change of the samples, as will be more detailed later in this report.

[0043] Optionally, at least one integrated circuit can be attached to the top cover 4 of the device. Other elements, such as trigger buttons, informational displays, among others, can also be positioned on the top cover 4 of the device.

[0044] FIG. 3 shows a front view of the optional configuration of the LAMP assay device shown in FIG. 1.

[0045] FIG. 4 shows the section AA shown in FIG. 3, and FIG. 5 shows the section BB shown in FIG. 3.

[0046] It is observed more clearly that the heating chamber 5 is adapted to receive the support rail 2 of at least one sample of biological material inside it.

[0047] Optionally, the support rail 2 comprises a side wall 10 at its outer end. In this way, when the rail is completely inserted in the heating chamber 5, the side wall 10 provides the insulation of the inner region of the heating chamber 5.

[0048] It is important to note that the number of samples that the support rail 2 can accommodate is variable according to each embodiment. The minimum number provided is one sample, however, as many samples may be accommodated as necessary in specific embodiments.

[0049] FIG. 6 illustrates an isolated and exploded view of the heating chamber 5 according to an optional configuration of the present invention. The heating chamber 5 comprises at least one internal heating element 8a, 8b. The at least one heating element 8a, 8b is adapted to heat the interior of the heating chamber 5, which can provide for the initiation of the reaction in the samples, as previously described.

[0050] Optionally, at least two heating elements are positioned inside the heating chamber 5, where at least one lower heating element 8b is positioned in a lower portion of the heating chamber 5, and at least one upper heating element 8a is positioned in an upper portion of the heating chamber 5. In the example illustrated in FIG. 6, two heating elements are positioned in the upper portion of the chamber and two in the lower portion, however, it is emphasized that this configuration is optional.

[0051] When the configuration described in the previous paragraph is adopted, the upper heating element 8a produces greater calorific value, configured through the microcontrolled circuit. In turn, the lower heating element 8b comprises a heating circuit with less calorific value, resulting from the configuration of the microcontrolled circuit. This configuration is adopted in order to obtain less thermal radiation at the bottom of the heating chamber 5, thereby preventing the evaporation of the most volatile compounds from the microtubes during the assay.

[0052] It is also provided that the heating chamber 5 comprises a circuit of light-emitting elements 6, preferably light-emitting diodes 6 (LED), positioned on the front or rear wall.

[0053] Positioned in the heating chamber 5 in a position opposite to the circuit of light emitting elements 6, a circuit of light sensors 7 is also provided, optionally LDRs (Light Dependent Resistors).

[0054] Preferably, a light-emitting element and a light-sensing element are positioned at opposite points with respect to each sample inside the chamber. In this way, the circuit of light emitting elements 6 illuminates the samples inside the heating chamber 5 and the circuit of light sensors 7 identifies the color of the light emitted by each sample.

[0055] This system must be controlled by a real-time control system, in order to identify the exact moment when a sample undergoes any color change.

[0056] In order to control the temperature inside the heating chamber 5, it is also optionally provided that the heating chamber 5 comprises a temperature sensor positioned inside it. The temperature sensor is preferably positioned in an intermediate region of the heating chamber 5.

[0057] The temperature sensor must also be in communication with a control system. Thus, the control system will manage the power of at least one heating element 8a, 8b in response to the information received by the temperature sensors, keeping the heating chamber 5 at the desired and planned temperature for each assay.

[0058] Preferably, the control system is positioned on an upper wall of the heating chamber 5 and is in communication with the other elements described, namely, at least one heating element 8a, 8b, the circuit of light emitting elements 6, the light sensor circuit 7 and the temperature sensor. In addition, the control system can control power supply for all of these elements.

[0059] Thus, the control system acts as a processing, control and communication unit of the heating chamber 5.

[0060] In summary, according to the previously described, the detection set consists of light emitters 6 and detectors that monitor the color change of the samples evaluated during the assay, recording the moment when the color change occurs, in this case of a positive reaction.

[0061] It is important to note that the polarization of the resistive elements, internal to the assay chamber, causes the current flow that generates heat through the power dissipation, a phenomenon known as the Joule effect, applied in this case to obtain a homogeneous temperature range in the region where the samples are positioned for reaction.

[0062] Thus, the heating chamber 5 has the objective of low cost and in this case no form of heat and/or circulation removal is applied, in order to obtain thermal homogeneity only by controlling the current flow through the element resistive considering its thermal inertia to maintain the internal environment of the chamber in the temperature range determined for reaction.

[0063] Therefore, after preheating, the system operates through a dedicated control that adjusts the heat capacity necessary for the temperature balance inside the heating chamber 5. This control is done by the control system, through the information of the sensor elements distributed in the region of the samples correlating the thermal inertia of the heating element 8a, 8b so that there are no variations outside the sample reaction range.

[0064] The current flow applied to the heating element 8a, 8b needs to be aligned with the thermal inertia of the heating element 8a, 8b due to the time it takes to deliver the amount of heat necessary to reach the equilibrium temperature determined for the assay.

[0065] In this way, the system works by measuring the speed with which the environment inside the chamber gains or loses heat to the external environment and creates a controlled compensation for the current flow applied to the heating element 8a, 8b. Since the thermal inertia of the air is not high, long periods of thermal equilibrium are not necessary. In addition, the good thermal conductivity of the air also helps to homogenize the temperature inside the chamber.

[0066] Therefore, the ability of the LAMP assay device described to change the temperature quickly is given by the thermal inertia that is directly related to the thermal constant, heat capacity and the mass to be heated inside the heating chamber 5. The purpose of thermal control is to regulate the established temperature limits, within the time determined for each reaction, so that the system acts safely.

[0067] Optionally, the top cover 4 of the LAMP assay device can comprise trigger and configuration buttons, a visualization display, and other interface elements as deemed necessary. These interface elements are intended to make it possible to configure and control the device in each application.

[0068] It should be noted that all interface elements must be in communication with the control system described above.

[0069] Optionally, the management of the buttons, the collection of data from the sensors, the display of messages on the display and the temperature control of the chamber are performed by a program written in C language, called embedded software.

[0070] Also optionally, the LAMP assay device can comprise a means to remotely connect to electronic devices that allow to control and/or view the assays performed, download assays data/results, among other functions. This connection can be made wirelessly or using cables.

[0071] The operating mode of the LAMP assay device may be as described below.

[0072] Initially, the device is connected to a power supply source and an On/Off switch is activated. Before starting the reaction mode, the sample support rail 2 must be kept outside the heating chamber 5.

[0073] Using the user interface (buttons), the system is started, entering a stabilization cycle for a predetermined period of time to reach the temperature range determined for the assay to be performed. At this time, the display may show a message indicating that the camera is being stabilized.

[0074] After the time required for temperature stabilization has elapsed, the system will be ready to start the reaction assay and a message may be displayed, indicating that the heating chamber 5 is stabilized.

[0075] After the stabilization cycle, that is, with the temperature suitable for the assay stabilized inside the heating chamber 5, the sample support rail 2 is inserted into the heating chamber 5 through the sample insertion opening 1. At that moment, the command to start the reaction is given. The reaction start command can be given via a button on the top cover 4 of the device or any other means, such as remote control.

[0076] During the reaction assay, the internal temperature information of the chamber, the elapsed time of the assay, the color reading value of each sample, as well as any other information deemed relevant are shown on the display.

[0077] After the determined assay time for the reaction has elapsed, the assay is ended and the display may show a message stating: the assay result; user instructions; or other relevant information.

[0078] It is noteworthy that the control system of the LAMP assay device can also connect remotely, via Bluetooth technology, to other electronic devices (such as computers, smartphones, notebooks, etc.) in order to produce tables, graphs, data plotting assays, and export any relevant information from the assays performed.

[0079] Thus, it is clear that the proposed LAMP assay device solves the status of technique problems it proposes, that is, it allows the performance of LAMP assays efficiently, simply and quickly.

[0080] A wide range of variations on the scope of protection of this application are allowed. Consequently, it is reinforced that this invention is not limited to the particular settings/embodiments described above.