Sir—Viruses have evolved various strategies to counteract host-cell processes, notably our immune responses toward their invasion. Oleszak and colleagues reported that the spike proteins of coronaviruses, particularly the mouse hepatitis virus, bovine coronavirus, and transmissible gastroenteritis virus, display Fc gamma receptor activity. Such molecular mimicry of components of our own immune ...

Lupus nephritis is a frequent complication of systemic lupus erythematosus. Multiple pathological mechanisms attribute to the pathogenesis of lupus nephritis. These mechanisms can be grossly divided into two groups, extrarenal or intrarenal pathways. A variety of genetic variants break immune tolerance to nuclear autoantigens, as evident from the existence of antinuclear antibodies. Furthermore...

Wing-pattern mimicry in butterflies has provided an important example of adaptation since Charles Darwin and Alfred Russell Wallace proposed evolution by natural selection >150 years ago. The neotropical butterfly genus Heliconius played a central role in the development of mimicry theory and has since been studied extensively in the context of ecology and population biology, behavior, and mimi...