141 research outputs found
Revisiting Extraversion and Leadership Emergence: A Social Network Churn Perspective
One of the classic relationships in personality psychology is that extraversion is associated
with emerging as an informal leader. However, recent findings raise questions about the
longevity of extraverted individuals as emergent leaders. Here, we adopt a social network
churn perspective to study the number of people entering, remaining in, and leaving the
leadership networks of individuals over time. We propose that extraverted individuals endure
as emergent leaders in networks over time, but experience significant changes in the people
being led, including the loss of people who once considered them a leader but now no longer
do. In Study 1 (N = 545), extraverted individuals had a larger number of new and remaining
people in their leadership networks, but also lost more people, above and beyond differences
in initial leadership network size. In Study 2 (N = 764), we replicated and extended these
results in an organizational sample while controlling for alternative explanations such as
formal rank, network size, self-monitoring, and narcissism. Extraversion predicted the
number of people entering, remaining in, and leaving leadership networks over time. Our
findings suggest that while extraverted individuals tend to emerge as leaders, they are also
more likely to experience greater network churn—they tend to lead different people over time
and leave people in their wake who once perceived them a leader but now no longer do. We
discuss the challenges posed by this network churn perspective for extraverted emergent
leaders and highlight its importance for our understanding of extraversion and emergent
leadership
Targeting DNA Repair, Cell Cycle, and Tumor Microenvironment in B Cell Lymphoma
The DNA double-strand break (DSB) is the most cytotoxic lesion and compromises genome stability. In an attempt to efficiently repair DSBs, cells activate ATM kinase, which orchestrates the DNA damage response (DDR) by activating cell cycle checkpoints and initiating DSB repair pathways. In physiological B cell development, however, programmed DSBs are generated as intermediates for effective immune responses and the maintenance of genomic integrity. Disturbances of these pathways are at the heart of B cell lymphomagenesis. Here, we review the role of DNA repair and cell cycle control on B cell development and lymphomagenesis. In addition, we highlight the intricate relationship between the DDR and the tumor microenvironment (TME). Lastly, we provide a clinical perspective by highlighting treatment possibilities of defective DDR signaling and the TME in mantle cell lymphoma, which serves as a blueprint for B cell lymphomas
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