Pankit Vachhani, John Mascarenhas , Prithviraj Bose , Gabriela Hobbs, Abdulraheem Yacoub, Jeanne M. Palmer , Aaron T. Gerds, Lucia Masarova, Andrew T. Kuykendall, Raajit K. Rampal, Ruben Mesa and Srdan Verstovsek
Abstract: Interferons are cytokines with immunomodulatory properties and disease-modifying effects that have been used to treat myeloproliferative neoplasms (MPNs) for more than 35 years. The initial use of interferons was limited due to difficulties with administration and a significant toxicity profile. Many of these shortcomings were addressed by covalently binding polyethylene glycol to the interferon structure, which increases the stability, prolongs activity, and reduces immunogenicity of the molecule. In the current therapeutic landscape, pegylated interferons are recommended for use in the treatment of polycythemia vera, essential thrombocythemia, and primary myelofibrosis. We review recent efficacy, molecular response, and safety data for the two available pegylated interferons, peginterferon alfa-2a (Pegasys) and ropeginterferon alfa-2b-njft (BESREMi). The practical management of interferonbased therapies is discussed, along with our opinions on whether to and how to switch from hydroxyurea to one of these therapies. Key topics and questions related to use of interferons, such as their safety and tolerability, the significance of variant allele frequency, advantages of early treatment, and what the future of interferon therapy may look like, will be examined. Pegylated interferons represent an important therapeutic option for patients with MPNs; however, more research is still required to further refine interferon therapy.
No one can prepare you for a cancer diagnosis of a child. Our daughter was four years old and began to complain about headaches. I assumed it was her eyes and made an appointment with an optometrist. Her sight was perfectly normal. A visit to her pediatrician lasted an hour with little insight, only suggestions to watch her diet, limit TV time and give her lots of water. She rarely watched TV and carried water with her throughout the day. Our diet doesn’t include sugar except from fresh fruit and we don’t eat boxed or canned food. I wasn’t optimistic. Eventually, her headaches became more severe on occasion, similar to migraines. We were sent to a neurologist. He requested blood work after she underwent an MRI. Thankfully, the blood work identified the problem-ET or essential thrombocythemia. We had never heard of it and had no idea what this meant for the future. A hematologist became our savior. With the proper diagnosis and medication, our daughter began to feel better, albeit a few side effects from the meds. Yogurt is a staple to help with GI issues, and a nap and early bedtime help fatigue. Yes, our little girl had what I would call fatigue. Our lives have changed but we do not let her ET control us. We control her ET. We manage her diagnosis as part of our daily lives as we would manage any other chronic disease. That is not to say it’s been easy. We have our moments of fear and doubt, but that doesn’t last as long as it used to. We keep very good records of her doctor visits, her blood levels and her overall health. We ask how she is feeling and pay attention to any changes that could be due to her ET. She is now 12 and enjoying a normal childhood. We are looking at Interferfon as a possible “next protocol,” if we think it will be better for her. We stay informed and are very pleased to see all of the clinical trials and new drugs on the horizon. It’s easy to say don’t panic if your child is diagnosed with an MPN. I would simply say, gather the facts, stay informed, be the voice they cannot be, and remember to take good care of yourself.