A precursor experience of the SUS with the participation of Paulo Freire.

The text is based on a round table held at the Faculty of Education (FE) of the State University of Campinas (Unicamp) as one of the activities to commemorate Paulo Freire's Centenary (2021). It aims to record part of his time at the university, from 1980 to 1991, based on the work conducted with FE and the Faculty of Medical Sciences (FCM) through training and extension activities at the Paulínia-SP School Health Center. It also describes and analyses the agendas of the country's re-democratization process, the clashes over public policies in the National Constituent Assembly, and the process of setting up an integrated and universal system of education and collective public health from a participatory perspective.

Involvement of H2A variants in DNA damage response of zygotes.

Phosphorylated H2AX, known as γH2AX, forms in response to genotoxic insults in somatic cells. Despite the high abundance of H2AX in zygotes, the level of irradiation-induced γH2AX is low at this stage. Another H2A variant, TH2A, is present at a high level in zygotes and can also be phosphorylated at its carboxyl end.

DNA repair is efficient in irradiated M phase zygotes.

In somatic cells, DNA repair is attenuated during mitosis to prevent the formation of anaphase bridges and facilitate the proper segregation of sister chromatids. Irradiation-induced γH2AX foci persist for hours in M phase somatic cells. However, we observed that anaphase bridges formed in a significant fraction of mouse zygotes irradiated during mitosis.

H3.1/3.2 regulate the initial progression of the gene expression program.

In mice, transcription from the zygotic genome is initiated at the mid-one-cell stage, and occurs promiscuously in many areas of the genome, including intergenic regions. Regulated transcription from selected genes is established during the two-cell stage. This dramatic change in the gene expression pattern marks the initiation of the gene expression program and is essential for early development.

Coevolutionary Interactions between Sexual and Habitat Isolation during Reinforcement.

Speciation often involves the evolution of multiple genetic-based barriers to gene flow (i.e., "coupling").