Neuronal circuitry of experience-induced parental care

Parental care in altricial mammalian species is critical for survival of the newborn and constitutes a major determinant for offspring physiological, emotional and cognitive development. The ability to care for the young and the associated behavioral repertoire are innate and readily displayed by postpartum females. After a period of exposure to pups, virgin females also develop care behavior which becomes comparable to the one of mothers over time. However, the plastic changes underlying experience-induced parental behavior in the female brain, have remained unexplored.. Here we aim to shed light on the organizational principles of the neural networks involved in the dynamic development of parental care behavior. Using the mouse as model system we seek to unravel the neural underpinnings of experience-modulated parental responsiveness. We will determine the neural circuitry involved in the experience-dependent development of parental care using viral tracing techniques and characterize relevant participating cell populations by single cell RNA sequencing. Chemogenetics will be used to determine the functional relevance of the identified circuitry for parental behavior. Understanding the molecular mechanisms and neural networks underlying the experience- dependent modulation of parental responsiveness may be of translational value considering considering pathological conditions of dysfunctional care behavior in people (eg. postpartum depression/ psychosis) where therapeutic modifications of the aberrant display by experience (psychotherapy) and/ or pharmacological interventions is desirable

How the Brain Learns to Care: New Insights into the Origins of Maternal Behavior A team led by Daniela D. Pollak has made a breakthrough in understanding how the brain learns to care for others, especially in females experiencing motherhood for the first time. Their research reveals how specific brain circuits are activated when a female mouse, who has never had pups before, learns to care for newborns. This finding helps explain how the ability to nurture and protect young ones develops, even without prior experience. The study focused on a part of the brain called the anterior cingulate cortex (ACC) and its connection to a region in the thalamus known as the centrolateral nucleus (CL). The researchers discovered that when virgin female mice are exposed to pups, the ACC and CL form a communication loop that becomes highly active. This brain activity is not seen in experienced mothers or in females exposed only to objects, showing that this circuit is specifically involved in learning maternal behavior for the first time. Importantly, the team identified a special group of brain cells in the CL that produce a molecule called galanin, which is known to influence social behaviors. These galanin-producing cells were especially active when the females began to care for pups. By using advanced genetic tools, the scientists could turn this brain circuit on or off. When they blocked the circuit, the females struggled to learn how to care for the pups. When they activated it, the females became better at nurturing, even if they had never done so before. This research provides a scientific explanation for how caregiving behaviors can be learned and not just instinctive. It also shows that the brain has built-in flexibility, allowing animals-and potentially humans-to adapt and learn important social behaviors based on experience. Understanding these brain mechanisms could have important implications for mental health, especially for conditions where social or parental behaviors are affected. In the future, these findings might help develop new ways to support parents who struggle with caregiving due to mental health challenges. They could also shed light on how early life experiences shape our ability to connect and care for others, with possible impacts on social, cultural, and medical fields.