Resumen: We consider the class Et(Y) of Appell polynomials whose generating function is given by means of a real power t of the moment generating function of a certain random variable Y. For such polynomials, we obtain explicit expressions depending on the moments of Y. It turns out that various kinds of generalizations of Bernoulli and Apostol-Euler polynomials belong to Et(Y) and can be written and investigated in a unified way. In particular, explicit expression for such polynomials can be given in terms of suitable probabilistic generalizations of the Stirling numbers of the second kind. Idioma: Inglés Año: 2021 Publicado en: Integers 21, A60 (2021), [10 pp.] ISSN: 1553-1732 Originalmente disponible en: Texto completo de la revista