Method for detecting chemical substances in samples of material that can be taken from a subject, in particular for detecting embryotoxic factors

1. A method for suppressing an immune system of a donor subject in which embryotoxic factors (ETFs) are present comprising the following steps:

preparing a sample of blood serum and/or plasma from the donor subject;

associating, with the sample, a control element suitable for verifying a level of the ETFs in the sample;

verifying the level of the ETFs in the sample based on a level of change of state of the control element, the verifying comprising the following sub-steps:

maintaining an environmental interaction between the control element and the sample for a defined period; and

attributing to the sample a toxicity level based on the level of change of state of the control element, the toxicity level being proportional and quantitatively correlated to a quantitative level of the ETFs in the sample; and

exposing the donor subject to immune-system suppressing agents based on the level of change of state of the control element,

wherein:

the control element comprises one or more living organisms comprising at least one fish belonging to the class Actinopterygii , having the ability to nourish itself autonomously through one or more temporary organs associated with the living organism, and being able to supply nutritive substances to the one or more temporary organs without taking the nutritive substances from an outside environment; and

the donor subject is a human or an animal.

2. The method according to claim 1 , wherein the at least one fish is of the species Danio rerio.

3. The method according to claim 2 , wherein the at least one fish of the species Danio rerio belongs to a strain of genotype “AB”.

4. The method according to claim 1 , wherein the one or more temporary organs comprise yolk sac temporary organs that are developed integrally with the one or more living organisms.

5. The method according to claim 1 , wherein the step of associating the control element with the sample comprises the following sub-steps:

exposing a predetermined number of the one or more living organisms to the sample, the predetermined number preferably being at least 20 embryos of Danio rerio having a development and/or cell multiplication time no greater than 72 hours after fertilization;

placing groups of equal numbers of the embryos of Danio rerio in respective verification containers; and

adding the sample to the verification containers.

6. The method according to claim 5 , wherein the verification containers comprise at least two adjacent wells of a culture plate.

7. The method according to claim 5 , wherein:

the sub-step of maintaining an environmental interaction between the control element and the sample is carried out in the verification containers, the defined period ranging from 12 hours to 48 hours; and

the sub-step of attributing to the sample a toxicity level is carried out by counting a number of deceased embryos after the defined period and attributing to the sample a toxicity level based on the number of deceased embryos.

8. The method according to claim 7 , wherein the toxicity level is defined as “toxic” when the number of dead embryos exceeds 50% of the total number of embryos placed in the verification containers, the toxicity level being alternatively defined as “moderately toxic” when the number of dead embryos ranges between 50% and 30% of the total number of embryos placed in the verification containers, and the toxicity level being alternatively defined as “non-toxic” when the number of dead embryos is less than or equal to 20% of the total number of embryos placed in the verification containers.

9. The method according to claim 1 , wherein the step of exposing the donor subject to the immune-system suppressing agents comprises administering infusions of immunoglobulin and/or suppressors of cytokine production.

10. The method according to claim 9 , wherein the infusions are administered intravenously.

11. The method according to claim 1 , wherein the step of exposing the donor subject to the immune-system suppressing agents comprises applying progesterone and/or progesterone oil topically on the donor subject or to a culture medium suitable for artificial insemination processes associated with the donor subject.

12. The method according to claim 1 , wherein the step of exposing the donor subject to the immune-system suppressing agents comprises administering one or more of vitamin, non-vitamin, or nutraceutic compounds, natural or phytotherapeutic active ingredients, or food supplements.