 BOSTON, June 24, 2021 GLOBE NEWSWIRE -- Aileron Therapeutics NASDAQ:ALRN, a chemoprotection oncology company focused on fundamentally transforming the experience of chemotherapy for cancer patients, announced today that it is set to join the Russell Microcap Index at the conclusion of the 2021 Russell indexes annual reconstitution, effective after the U.S. market opens on June 28, 2021. 