 Putin's daughter came to attention with her articles published in Western academic journals. Western academic journals have continued to publish articles by President Vladimir Putin's oldest daughter since Moscow's February 2022 invasion of Ukraine, the independent news outlet Mozem Oblastnit reported. Maria Vorontsova is a candidate of medical sciences and an endocrinologist by training. Her profile on the Moscow State University website contains links to her research, includes five articles in the Swiss Open Access Scientific Journal, MDPI, and one in a journal published by the US Endocrine Society. Three of the articles co-authored by Vorontsova were published after Russia's 2022 invasion of Ukraine and one in early February 2022 according to Mozem Oblastnit. Neither MDPI nor the Endocrine Society responded to the outlet's request for comments in the two months since it approached them. Publishing Vorontsova's articles is not prohibited by Western sanctions but can hurt the publisher's reputation. An anonymous editor of a popular science magazine from an unnamed country told the outlet. The United States sanctioned Vorontsova and her younger sister Katerina Tikhonova in April 2022 as part of wide-ranging measures in response to Russia's invasion of Ukraine. The EU said Vorontsova was on its list because she was co-owner of Nomenko, a company involved in Russia's largest private investment project in healthcare. She was thus deemed to benefit from the Russian government and was involved in a sector providing its revenue. The Kremlin has kept details of Putin's daughter's lives a closely guarded secret. Putin has never acknowledged that Vorontsova and Tikhonova are his daughters, often referring to them only as these women during interviews.