Difference between revisions of "Team:Grenoble-Alpes/actors partnerships"

Learn how partnerships had influenced our project !

BIOMERIEUX

According to their advice we have:
- used a lysis buffer as an efficient positive control
- planned to add a cover to protect the contents of the tubes
- placed a ball bearing in the axis of the pipette
- understand that hybridization will happen even without mutations, rendering false positives. A possible idea to fix this problem is to do as for the resistance probe design on Staphylococcus aureus: it is necessary to find an enzyme that cuts at the place of the mutation (butt or cohesive) and a plasmid that is cut in the same place. In this case even if there is hybridization with the two ends cut it does not reform the plasmid, so it is not transformed if there is no mutation.
But the plasmid must be in very large excess to decrease the effect of competition and it is unlikely to find an enzyme that cuts at the level of mutation. This problem might be solved by using CrisPr-Cas9 system.

Béatrice advised us to make dilutions of the positive control for the freeze-drying of bacteria rather than comparing with the frozen equivalent each time. She also advised us to compare the processing efficiency after freeze-drying with the conventional laboratory freezing method (number of colonies similar to a given dilution).

Cécile Breton's conference on phage therapy, antibiotic resistance, hyper-efficiency and specificity of phages led us to choose the subject of our project.

Avalun offered us SMD camera fluorescence detection and advised us to work with STmicroelectronics.

INTERVIEW WITH PIERRE-ALAIN FALCONNET
Medical Analysis Laboratory Manager
ORIADE NOVIALE
38240 MEYLAN

We presented our system to Pierre Alain Falconnet to see if it could work in the context of a medical analysis laboratory. The system seems totally adapted to the laboratory use. According to him, the operating principles are good. It is still necessary to make specificity and sensitivity tests and to know the processing time of a sample.
The most important is to have an accreditation (COFRAC, CEIVD) because without this, the analysis laboratories will probably not want to have the system.
If the use of phages is regulated by a standard P2 and not P3 or P4, he could even use the machine in his own laboratory.
He offered to help us by giving us test samples.

INTERVIEW WITH PR. MAX MAURIN

Dr. Max Maurin notes that in the last few years, he had to face new therapeutic dead-ends caused by the antibiotic resistance that did not exist before. The issue of antibiotic resistance is, in fact, a major issue that we should urgently address. Pseudomonas is a pathogen that he encounters quite often in his department. It is not too virulent but it has numerous resistance mechanisms. According to Dr. Maurin, phage therapy is a very interesting alternative even if it arises some ethical unsolved issues and can also cause a resistance of the bacteria toward phages. The use of bacteriophages in a medical establishment seems feasible because a few years ago, viruses were already used in the biological laboratory of hospitals.

Overall, Dr. Maurin thinks that our system is very interesting and answers well the given problem. However, some biological risks have to be taken into account such as the dissemination of the system components. If these aspects are well evaluated and handled, the system is very promising. Yet, Dr. Morin thinks that it will be very difficult to play on the sensitivity and the specificity of our system to compete with today’s methods in molecular biology. Among all the different specificities of our system, it is mostly the bacteriophages selection that caught his attention the most.

At last, Dr. Morin thinks that physicians do not have enough ethical formations and are not aware enough of new bioethical laws.

INTERVIEW WITH PR. OLIVIER EPAULARD

Each day, Pr. Olivier Epaulard is confronted with patients suffering from diseases caused by resistant bacteria. According to him, a misuse of antibiotics is the cause of 90% of the resistances and one antibiotic treatment out of two is wrongly prescribed. The number of antibiotic resistances does not cease to grow, like the number of immunosuppressed patients. Therefore, antibiotic resistance is a major issue of our century. Pseudomonas is also a pathogen that he encounters quite often in his department. Pr. Epaulard cannot make up his mind on the subject of phage therapy because he does not understand why it is not more developed. The positive aspect of this alternative is that bacteriophages destroy all bacteria - even the inactive ones -, something that antibiotics cannot do. According to him, the use of bacteriophages inside his department would not cause any issue.

Pr. Epaulard thinks that the project is very interesting. He is not overly passionate about the identification aspect but rather by the therapy aspect of the project. The diagnostic tools he uses have already very good specificity and sensitivity. It is going to be hard to compete with them. He verified many aspects of the biology in the system and was pleased with our answers.

Pr. Epaulard thinks that one can learn about bioethics through practice. Therefore, there is no need for more theoretical courses on ethics in a physician formation.

INTERVIEW WITH H.G, PATIENT TREATED WITH PHAGE THERAPY

After getting infected feet wounds, H.G was treated with antibiotics but the infection was not cured. No antibiotic worked and the infection spread. The only way to treat this patient was to amputate the two legs. H.G had heard about phage therapy and contacted a doctor specialized on the subject. He chose to try phage therapy to cure his wounds. Bacteriophages were applied for a year on the wounds and he is now almost cured.

On the pictures, you can see the state of his left foot before and after the phage therapy.