**About the Editor**

**Anders Johansson**, PhD, Associate Professor. Dr. Johansson is a docent in experimental periodontology and has been active for several decades at Umea University, focusing on the major ˚ research topics of the interactions between A. actinomycetemcomitans and leukocytes. Dr. Johansson and co-workers have discovered active processes in leukocytes that have been induced by leukotoxin, like neutrophil degranulation and inflammasome activation in macrophages. The research has also involved clinical studies that contributed to clarifying the role of enhanced leukotoxin production for disease progression.
