¿Podría la tecnología CRISPR terminar con el síndrome de Dravet?

El síndrome de Dravet está causado principalmente por mutaciones de pérdida de función en una sola copia del gen SCN1A. El producto del gen, es decir, el canal de sodio Nav1.1, se vuelve insuficiente para la correcta actividad de las interneuronas GABAérgicas, con la consiguiente pérdida de su capacidad para inhibir eficazmente los circuitos neuronales y el desarrollo de crisis epilépticas intratables. Esta condición genética se define como haploinsuficiencia de Nav1.1.

Sin embargo, aunque disfuncionales, las interneuronas GABAergéticas no parecen degenerar, por lo que debería ser posible restaurar su correcta funcionalidad con las herramientas terapéuticas adecuadas.

Los enfoques clásicos de la terapia génica en los que, por ejemplo, se suministra un gen SCN1A no mutado a las células neuronales mediante vectores virales, no pueden aplicarse fácilmente, ya que este gen es demasiado largo para ser empaquetado en los vectores más utilizados para abastecer de genes al cerebro (es decir, los vectores adenoasociados o AAV). Por esta razón, se han desarrollado recientemente una serie de estrategias alternativas que tienen por objeto rescatar la haploinsuficiencia del gen SCN1A potenciando la expresión de la copia sana del gen que ya se encuentra en las neuronas.

Entre dichas estrategias, el laboratorio del Dr. Vania Broccoli en el Ospedale San Raffaele de Milán ha desarrollado un enfoque para potenciar la expresión del gen SCN1A basado en la tecnología CRISPR/Cas9. Esta tecnología, que como sabéis ha ganado recientemente el Premio Nobel de Química, se utiliza para la edición genética, y permite agregar, interrumpir o cambiar la secuencia de genes específicos.

El grupo de Broccoli utiliza una versión adaptada de este sistema para que, sin realizar cortes en el gen, se dirija concretamente al fragmento de ADN que induce la expresión del SCN1A sano y lo active. Así, la Dra. Gaia Colasante, miembro del equipo de Broccoli, y el Dr. Gabriele Lignani del University College London, en Reino Unido, trabajaron juntos para demostrar que este sistema, al que han llamado Scn1a-dCas9A, puede impulsar específicamente la expresión del gen SCN1A y aumentar la cantidad de proteína Nav1.1 en neuronas extraídas de un modelo de ratón Dravet. Lo más importante, demostraron claramente que el tratamiento puede rescatar el “defecto de disparo” de las interneuronas GABAérgicas, característico de las neuronas Dravet.

El enfoque dio resultados prometedores también in vivo en un modelo de ratón del síndrome de Dravet. El tratamiento en estudio fue administrado mediante AAVs en el cerebro de crías de ratón con síndrome de Dravet pocos días después de su nacimiento. Los AAVs portaban una secuencia génica que permitía la expresión de estos elementos CRISPR modificados específicamente en las neuronas GABAérgicas afectadas por el síndrome de Dravet. El sistema CRISPR fue suficiente para lograr una recuperación del disparo neuronal y una mejora de las crisis inducidas por alta temperatura en los ratones Dravet.

Los investigadores siguen trabajando para optimizar esta herramienta con el fin de mejorar su distribución en las neuronas y, por consiguiente, su eficacia in vivo.

Este estudio fue publicado este año en la revista Molecular Therapy AQUÍ.

Un sueño, una meta.

Este artículo ha sido amablemente escrito por la Dra. Gaia Colasante para la Fundación Síndrome de Dravet, con posterior edición por la Dra Elena Cardenal, Directora Científica de la Fundación.

📷 Imagen de microscopio tomada del hipocampo de un ratón Dravet. Las interneuronas GABAérgicas aparecen en verde; las neuronas rojas son aquellas en las que se ha suministrado la herramienta Scn1a-dCas9A; las amarillas (verde + rojo) son interneuronas GABAérgicas que han adquirido el sistema Scn1a-dCas9A.

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TERMS & CONDITIONS

The Dravet Syndrome Conference 2023 is organised by Dravet Syndrome Foundation Spain, whose registered office is located at Calle Doctor Fleming, 30, 28036 Madrid, Spain.

The conference shall take place at the Official College of Nursing of Madrid, at Avenida de Menéndez Pelayo, 93, 28007 Madrid, Spain, on Thursday 23rd of March 2023. Attendance to this conference is free of charge, but mandatory for organisational reasons.

Participants must register online at www.dravetconference.com. Upon registration, each participant will receive an electronic confirmation by email. On-site registration will not be be possible. If a participant has not received the official email registration confirmation within 3 days, they must contact the conference secretariat at [email protected].

The conference registration includes: Attendance to all sessions, oral and visual presentations, all coffee and lunch breaks, and conference documentation with all information about the event. The registration does not include travel and accommodation costs or any other personal expenses.

Admittance to the conference without registration cannot be granted.

Conference Attendance
Upon arrival at the Official College of Nursing of Madrid the day of the event, all participants have to check-in at the onsite Conference Registration Desk. The desk will open on 23rd of March at 8:30 a.m. Upon registration onsite, the conference team will provide participants with information about the event and a badge, which should be worn visibly at all times. The personalised badge authorises participants to attend all conference sessions, and lunch and coffee breaks.

Cancellation Policy
Dravet Syndrome Foundation Spain reserves the right to cancel any registration forthwith and without liability on its part in the event of any damage to, or destruction of the venue by fire, shortage of labour, strikes, industrial unrest, public health measures, or any other cause beyond the control of the Dravet Syndrome Foundation Spain, which shall prevent it from performing its obligations. In these circumstances, every effort will be made to find an alternative format/venue or propose a new date for the conference. Should the conference be cancelled for any reason, airfares, hotels, or other costs incurred by the participants are not reimbursed by the Dravet Syndrome Foundation Spain.

Any participant is allowed to cancel his/her registration but must notify this to the conference organisers by e-mail at [email protected] within a minimum of 10 days prior the event. Failure to attend the event without prior written notification by email may incur a no-show fee, which shall cover individual organizational, material and catering costs.

Name Change
All registrations are only valid for the respective person mentioned in the form. A registered participant unable to attend the conference may nominate (free of charge) a substitute participant by notifying the conference organisers by email at [email protected] before 16th of March 2023. The procedure allows giving the last name, first name, and email address of the new participant.

Personal Data
Upon registration, the participant authorises Dravet Syndrome Foundation Spain to use their personal data stated above to inform the participant of any further conferences, events, or information concerning the conference and Dravet Syndrome Foundation Spain’s activities. The conference booklet online will only contain authors, titles, and affiliations of submitted abstracts, but no full abstract texts. The conference printed booklet will contain full abstract texts from all participants. Conference certificates will be sent to the participants as a PDF document upon request at [email protected]. Only the name & affiliation will be stated in the certificate, not the email addresses of the participants.

Information is collected by an automated computer system that manages registrations. Security and confidentiality are guaranteed by state-of-the-art technical tools. However, Dravet Syndrome Foundation Spain declines any responsibility concerning data security transmitted through the internet.

Photography
The conference is held in public; therefore, we do not ban participants, exhibitors, partners and other companies from taking photographs of conference activities and participants, and share it via social media. By participating in the conference, you approve that general pictures will be taken and used for our Social Media output, our websites and other communication purposes. You hereby waive any right to oppose, and expressly authorise the organiser to make them available on the Internet or as it may seem fit. Author’s presentation slides shall not be photographed by any conference participant. 

Disclaimer
The conference organiser cannot be held responsible for any loss, injury or damage to any property, whatever the cause may be. Should, for any reason outside the organiser’s control (e.g., political or economic circumstances or a case of ‘force majeure’), the venue or speakers change, or the event be cancelled, the organiser will endeavour to reschedule, but shall not be held responsible for any costs, damages or expenses incurred by the participants. If for any reason the organiser decides to make material changes to this conference, the organiser is not responsible for airfares, hotels or other costs incurred by the participants. The participant takes part in the conference, all tours, and trips at his own risk.

Copyright
The participant is allowed to use the conference documentation exclusively for his/her personal needs.

TERMS & CONDITIONS

The European Dravet Syndrome Advanced Therapies (EDSAT) Meeting 2023 is organised by Dravet Syndrome Foundation Spain, whose registered office is located at Calle Doctor Fleming, 30, 28036 Madrid, Spain.

The conference shall take place at the Official College of Nursing of Madrid, at Avenida de Menéndez Pelayo, 93, 28007 Madrid, Spain, on Friday 24th of March 2023. Attendance to this conference is free of charge, but mandatory for organisational reasons.

Participants must register online at www.dravetconference.com. Upon registration, each participant will receive an electronic confirmation by email. On-site registration will not be be possible. If a participant has not received the official email registration confirmation within 3 days, they must contact the conference secretariat at [email protected].

The conference registration includes: Attendance to all sessions, oral and visual presentations, all coffee and lunch breaks, and conference documentation with all information about the event. The registration does not include travel and accommodation costs or any other personal expenses.

Admittance to the conference without registration cannot be granted.

Conference Attendance
Upon arrival at the Official College of Nursing of Madrid the day of the event, all participants have to check-in at the onsite Conference Registration Desk. The desk will open on 24th of March at 8:30 a.m. Upon registration onsite, the conference team will provide participants with information about the event and a badge, which should be worn visibly at all times. The personalised badge authorises participants to attend all conference sessions, and lunch and coffee breaks.

Cancellation Policy
Dravet Syndrome Foundation Spain reserves the right to cancel any registration forthwith and without liability on its part in the event of any damage to, or destruction of the venue by fire, shortage of labour, strikes, industrial unrest, public health measures, or any other cause beyond the control of the Dravet Syndrome Foundation Spain, which shall prevent it from performing its obligations. In these circumstances, every effort will be made to find an alternative format/venue or propose a new date for the conference. Should the conference be cancelled for any reason, airfares, hotels, or other costs incurred by the participants are not reimbursed by the Dravet Syndrome Foundation Spain.

Any participant is allowed to cancel his/her registration but must notify this to the conference organisers by e-mail at [email protected] within a minimum of 10 days prior the event. Failure to attend the event without prior written notification
by email may incur a no-show fee, which shall cover individual organizational, material and catering costs.

Name Change
All registrations are only valid for the respective person mentioned in the form. A registered participant unable to attend the conference may nominate (free of charge) a substitute participant by notifying the conference organisers by email at [email protected] before 17th of March 2023. The procedure allows giving the last name, first name, and email address of the new participant.

Personal Data
Upon registration, the participant authorises Dravet Syndrome Foundation Spain to use their personal data stated above to inform the participant of any further conferences, events, or information concerning the conference and Dravet Syndrome Foundation Spain’s activities. The conference booklet online will only contain authors, titles, and affiliations of submitted abstracts, but no full abstract texts. The conference printed booklet will contain full abstract texts from all participants. Conference certificates will be sent to the participants as a PDF document upon request at [email protected]. Only the name & affiliation will be stated in the certificate, not the email addresses of the participants.

Information is collected by an automated computer system that manages registrations. Security and confidentiality are guaranteed by state-of-the-art technical tools. However, Dravet Syndrome Foundation Spain declines any responsibility concerning data security transmitted through the internet.

Photography
The conference is held in public; therefore, we do not ban participants, exhibitors, partners and other companies from taking photographs of conference activities and participants, and share it via social media. By participating in the conference, you approve that general pictures will be taken and used for our Social Media output, our websites and other communication purposes. You hereby waive any right to oppose, and expressly authorise the organiser to make them available on the Internet or as it may seem fit. Author’s presentation slides shall not be photographed by any conference participant.

Disclaimer
The conference organiser cannot be held responsible for any loss, injury or damage to any property, whatever the cause may be. Should, for any reason outside the organiser’s control (e.g., political or economic circumstances or a case of ‘force majeure’), the venue or speakers change, or the event be cancelled, the organiser will endeavour to reschedule, but shall not be held responsible for any costs, damages or expenses incurred by the participants. If for any reason the organiser decides to make material changes to this conference, the organiser is not responsible for airfares, hotels or other costs incurred by the participants. The participant takes part in the conference, all tours, and trips at his own risk.

Copyright
The participant is allowed to use the conference documentation exclusively for his/her personal needs.

TERMS & CONDITIONS

The European Dravet Syndrome Advanced Therapies (EDSAT) Meeting 2022 is organised by Dravet Syndrome Foundation Spain, whose registered office is located at Calle Doctor Fleming, 30, 28036 Madrid, Spain.

The conference shall take place at the Illustrious Official College of Physicians of Madrid, at Calle de Santa Isabel, 51, 28012 Madrid, Spain, on Friday 1st of April 2022. Attendance to this conference is free of charge, but mandatory for organisational reasons. Participants must register online at www.dravetconference.com. Upon registration, each participant will receive an electronic confirmation by email. On-site registration will not be be possible. If a participant has not received the official email registration confirmation within 3 days, they must contact the conference secretariat at [email protected].

The conference registration includes: Attendance to all sessions, oral and visual presentations, all coffee and lunch breaks, and conference documentation with all information about the event. The registration does not comprise travelling and accommodation costs or any other personal expenses.

Admittance to the workshop without registration cannot be granted.

Conference Attendance
Upon arrival at the Illustrious Official College of Physicians of Madrid the day of the event, all participants have to register at the onsite Conference Registration Desk. The desk will open on 1st of April at 8:30 a.m. Upon registration onsite, the conference team will provide participants with information about the event and a badge, which should be worn visibly at all times. The personalised badge authorises participants to attend all conference sessions, and lunch and coffee breaks.

Cancellation Policy
Dravet Syndrome Foundation Spain reserves the right to cancel any registration forthwith and without liability on its part in the event of any damage to, or destruction of the venue by fire, shortage of labour, strikes, industrial unrest, public health measures, or any other cause beyond the control of the Dravet Syndrome Foundation Spain, which shall prevent it from performing its obligations. In these circumstances, every effort will be made to find an alternative format/venue or propose a new date for the conference. Should the conference be cancelled for any reason, airfares, hotels, or other costs incurred by the participants are not reimbursed by the Dravet Syndrome Foundation Spain.

Any participant is allowed to cancel his/her registration but must notify this to the conference organisers by e-mail at [email protected] within a minimum of 10 days
prior the event. Failure to attend the event without prior written notification
by email may incur a no-show fee, which shall cover individual organizational,
material and catering costs.

Name Change
All registrations are only valid for the respective person mentioned in the form. A registered participant unable to attend the conference may nominate (free of charge) a substitute participant by notifying the conference organisers by email at [email protected] before 24th of March 2022. The procedure allows giving the last name, first name, and email address of the new participant.

Personal Data
Upon registration, the participant authorises Dravet Syndrome Foundation Spain to use their personal data stated above to inform the participant of any further conferences, events, or information concerning the conference and Dravet Syndrome Foundation Spain’s activities. The conference booklet online will only contain authors, titles, and affiliations of submitted abstracts, but no full abstract texts. The conference printed booklet will contain full abstract texts from all participants. Conference certificates will be sent to the participants as a PDF document upon request at [email protected]. Only the name & affiliation will be stated in the certificate, not the email addresses of the participants.

Information is collected by an automated computer system that manages registrations. Security and confidentiality are guaranteed by state-of-the-art technical tools. However, Dravet Syndrome Foundation Spain declines any responsibility concerning data security transmitted through the internet.

Photography
The conference is held in public; therefore, we do not ban participants, exhibitors, partners and other companies from taking photographs of conference activities and participants, and share it via social media. By participating in the conference, you approve that general pictures will be taken and used for our Social Media output, our websites and other communication purposes. You hereby waive any right to oppose, and expressly authorise the organiser to make them available on the Internet or as it may seem fit. Author’s presentation slides shall not be photographed by any conference participant.

Disclaimer
The conference organiser cannot be held responsible for any loss, injury or damage to any property, whatever the cause may be. Should, for any reason outside the organiser’s control (e.g., political or economic circumstances or a case of ‘force majeure’), the venue or speakers change, or the event be cancelled, the organiser will endeavour to reschedule, but shall not be held responsible for any costs, damages or expenses incurred by the participants. If for any reason the organiser decides to make material changes to this conference, the organiser is not responsible for airfares, hotels or other costs incurred by the participants. The participant takes part in the conference, all tours, and trips at his own risk.

Copyright
The participant is allowed to use the conference documentation exclusively for his/her personal needs.

TERMS & CONDITIONS

The Dravet Syndrome Conference 2022 is organised by Dravet Syndrome Foundation Spain, whose registered office is located at Calle Doctor Fleming, 30, 28036 Madrid, Spain.

The conference shall take place at the Illustrious Official College of Physicians of Madrid, at Calle de Santa Isabel, 51, 28012 Madrid, Spain, on Thursday 31st of March 2022. Attendance to this conference is free of charge, but mandatory for organisational reasons. Participants must register online at www.dravetconference.com. Upon registration, each participant will receive an electronic confirmation by email. On-site registration will not be be possible. If a participant has not received the official email registration confirmation within 3 days, they must contact the conference secretariat at [email protected].

The conference registration includes: Attendance to all sessions, oral and visual presentations, all coffee and lunch breaks, and conference documentation with all information about the event. The registration does not include travel and accommodation costs or any other personal expenses.

Admittance to the conference without registration cannot be granted.

Conference Attendance
Upon arrival at the Illustrious Official College of Physicians of Madrid the day of the event, all participants have to register at the onsite Conference Registration Desk. The desk will open on 31st of March at 8:30 a.m. Upon registration onsite, the conference team will provide participants with information about the event and a badge, which should be worn visibly at all times. The personalised badge authorises participants to attend all conference sessions, and lunch and coffee breaks. 

Cancellation Policy
Dravet Syndrome Foundation Spain reserves the right to cancel any registration forthwith and without liability on its part in the event of any damage to, or destruction of the venue by fire, shortage of labour, strikes, industrial unrest, public health measures, or any other cause beyond the control of the Dravet Syndrome Foundation Spain, which shall prevent it from performing its obligations. In these circumstances, every effort will be made to find an alternative format/venue or propose a new date for the conference. Should the conference be cancelled for any reason, airfares, hotels, or other costs incurred by the participants are not reimbursed by the Dravet Syndrome Foundation Spain.

Any participant is allowed to cancel his/her registration but must notify this to the conference organisers by e-mail at [email protected] within a minimum of 10 days prior the event. Failure to attend the event without prior written notification by email may incur a no-show fee, which shall cover individual organizational, material and catering costs.

Name Change
All registrations are only valid for the respective person mentioned in the form. A registered participant unable to attend the conference may nominate (free of charge) a substitute participant by notifying the conference organisers by email at [email protected] before 24th of March 2022. The procedure allows giving the last name, first name, and email address of the new participant.

Personal Data
Upon registration, the participant authorises Dravet Syndrome Foundation Spain to use their personal data stated above to inform the participant of any further conferences, events, or information concerning the conference and Dravet Syndrome Foundation Spain’s activities. The conference booklet online will only contain authors, titles, and affiliations of submitted abstracts, but no full abstract texts. The conference printed booklet will contain full abstract texts from all participants. Conference certificates will be sent to the participants as a PDF document upon request at [email protected]. Only the name & affiliation will be stated in the certificate, not the email addresses of the participants.

Information is collected by an automated computer system that manages registrations. Security and confidentiality are guaranteed by state-of-the-art technical tools. However, Dravet Syndrome Foundation Spain declines any responsibility concerning data security transmitted through the internet.

Photography
The conference is held in public; therefore, we do not ban participants, exhibitors, partners and other companies from taking photographs of conference activities and participants, and share it via social media. By participating in the conference, you approve that general pictures will be taken and used for our Social Media output, our websites and other communication purposes. You hereby waive any right to oppose, and expressly authorise the organiser to make them available on the Internet or as it may seem fit. Author’s presentation slides shall not be photographed by any conference participant. 

Disclaimer
The conference organiser cannot be held responsible for any loss, injury or damage to any property, whatever the cause may be. Should, for any reason outside the organiser’s control (e.g., political or economic circumstances or a case of ‘force majeure’), the venue or speakers change, or the event be cancelled, the organiser will endeavour to reschedule, but shall not be held responsible for any costs, damages or expenses incurred by the participants. If for any reason the organiser decides to make material changes to this conference, the organiser is not responsible for airfares, hotels or other costs incurred by the participants. The participant takes part in the conference, all tours, and trips at his own risk.

Copyright
The participant is allowed to use the conference documentation exclusively for his/her personal needs.