Given the task definition and input, reply with output. In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.

Nephritis is inflammation of the kidneys and may involve the glomeruli , tubules , or interstitial tissue surrounding the glomeruli and tubules .

Nephritis is inflammation of the kidneys .