momHealth: A Feasibility Study of a Multibehavioral Health Intervention for Pregnant and Parenting Adolescent Mothers.

Introduction: In 2016, 209,809 babies were born to mothers 15 - 19 years of age, for a live birth rate of 20.3 per 1,000 in this age group. Many health issues surround adolescent mothers and their infants, many of which can be addressed through behavioral change.

RAC1 regulates actin arrays during polarity establishment in the brown alga, Silvetia compressa.

Multicellular development has evolved independently on numerous occasions and there is great interest in the developmental mechanisms utilized by each of the divergent lineages. Fucoid algae, in the stramenopile lineage (distinct from metazoans, fungi and green plants) have long been used as a model for early development based on unique life cycle characteristics. The initially symmetric fucoid zygote generates a developmental axis that determines not only the site of growth, but also the orientation of the first cell division, whose products have distinct developmental fates.

Rac1 function during fucoid development.

Morphogenesis in fucoid algae begins with adhesive secretion and rhizoid germination, developmental events that secure the alga within the intertidal zone. The importance of the actin cytoskeleton during these processes has been well established; but in general, little is known about actin regulation within the stramenopile lineage. Based on conserved strategies for regulation of actin in other lineages, co-localization of the Arp2/3 complex with actin structures that are essential for rhizoid formation may implicate members of the Rho family of small GTPases in the signaling pathway(s) regulating actin polymerization during fucoid development.