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El papel de los epítopos Treg en la maduración de anticuerpos, descubierto por EpiVax
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EpiVax is an immunology company founded in 1998. We develop and employ extensive analytical capabilities in the field of computational immunology. We assess protein therapeutics for immunogenic risk and design more effective (and safer) vaccines. www.EpiVax.com .

News provided by

EpiVax, Inc.

Apr 22, 2025, 09:06 ET

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- El papel de los epítopos Treg (tregítopos) en la maduración de anticuerpos, descubierto en un nuevo estudio de EpiVax: implicaciones para los anticuerpos terapéuticos

PROVIDENCE, R.I., 22 de abril de 2025 /PRNewswire/ -- EpiVax, Inc. anuncia un nuevo estudio publicado en Frontiers in Immunology que revela el impacto de los péptidos conocidos como "tregítopos" en la maduración de anticuerpos durante la respuesta inmune.

Los ganglios linfáticos contienen anticuerpos cuya secuencia cambia al adaptarse a su diana inmunitaria, como el virus de la gripe. Al hacerlo, el contenido de secuencias de epítopos de linfocitos T reguladores (Treg) (también llamados tregítopos) en los anticuerpos parece disminuir, lo que permite que los linfocitos B se expandan y persistan.

El estudio, "El contenido de epítopos de células T reguladoras en anticuerpos humanos disminuye durante la maduración", fue realizado por el doctor Andrés Gutiérrez y la doctora Annie De Groot de EpiVax, utilizando datos existentes de secuencias de anticuerpos. "Este trabajo proporciona información importante sobre cómo evolucionan los anticuerpos con el tiempo, no solo en términos de afinidad, sino también en su capacidad para interactuar con el sistema inmunitario", afirmó el doctor Gutiérrez.

El descubrimiento de los tregitopos en 2008 supuso un cambio en la comprensión de la función de las células Treg naturales en la inmunidad humana y animal. Los tregítopos podrían explicar, en parte, el impacto tolerogénico de la terapia con inmunoglobulina intravenosa (IVIG). Desde entonces, se han encontrado péptidos similares a los tregítopos en otras proteínas propias.

Un análisis previo de los repertorios de anticuerpos humanos demostró que los epítopos de células T disminuyeron con el aumento de la maduración de anticuerpos. Sin embargo, dicho estudio no separó la dinámica de los epítopos de células T reguladoras de las efectoras. En este estudio, los investigadores examinaron los repertorios de anticuerpos de cuatro donantes humanos sanos. Evaluaron tres subconjuntos de epítopos de células T: tregítopos previamente validados, epítopos de células T potencialmente tolerados y epítopos de células T potencialmente efectoras.

Los hallazgos revelaron que, a medida que los anticuerpos maduran y presentan mayor afinidad por su antígeno diana, el contenido de tregítopos disminuye sistemáticamente, mientras que el contenido de epítopos de células T efectoras potenciales aumenta. Esto sugiere que la disminución de tregítopos es una característica fundamental de la evolución de los anticuerpos. Esta observación se confirmó mediante el análisis in vitro de algunas secuencias de tregítopos "naturales" y "modificadas".

"Este mecanismo probablemente sea relevante para la inmunidad frente a patógenos, para el desarrollo de autoanticuerpos durante enfermedades autoinmunes y para la selección de anticuerpos terapéuticos candidatos", explicó el doctor De Groot. "Nos complace aportar este hallazgo a la literatura sobre regulación inmunitaria y diseño de anticuerpos".

Acerca de EpiVax
EpiVax es líder en la evaluación preclínica de inmunogenicidad y la optimización de secuencias para terapias y vacunas. EpiVax colabora con socios de renombre mundial para acelerar la evaluación del riesgo de inmunogenicidad, la modulación inmunitaria y el diseño rápido de vacunas.

Contacto de prensa
Sarah Moniz
Directora de Desarrollo Comercial  
[email protected] 

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