If Vexus was a hereditary disease of cultivars, it was caused by inherited genetic mutations that would have been discovered long ago. A single gene was identified in 1997 by screening the DNA of families with the disease. Like cancer, Vexas is caused by what scientists call “somatic mutations,” or genetic mutations that occur in a person after birth.
Somatic mutations appear late in life, affect only a subset of a person’s cells, and are difficult to detect. Conventional genetic analysis misses them completely. If a particular mutation appears in only part of a person’s DNA, it can be classified as an error. To find somatic mutations, scientists have to look very carefully.
However, it is unacceptable to examine the entire genome in detail. Because there is too much data to sift through. So when David Beck, an assistant professor at the New York University School of Medicine, decided to go looking for disease-causing somatic mutations, he knew he needed to focus. It targeted a cellular process known as ubiquitination. Another protein called ubiquitin marks the protein and is often destroyed or shuttled elsewhere in the cell. This is a fundamental cellular process with wide-ranging consequences, and previous studies have shown that problems with ubiquitination can lead to inflammatory diseases.
Yet ubiquitination is complex. Beck identified 841 different genes involved. But its focus was narrow enough. After searching a database of over 2,500 inflammatory and other undiagnosed diseases, he found three of his males who shared somatic mutations at the same location in the same gene. It is his UBA1 that helps initiate the ubiquitination process. All of these men had blood problems, including too few platelets, abnormally large red blood cells, and immune system problems, including cartilage and lung inflammation.
But Vexas shares these symptoms with so many other diseases that, without Beck’s genetic research, no one would have guessed that all these men had the same disease. They were just three men among a large group of people plagued with ill-advised diagnoses.
For years, David Adams was one of them. A good-natured man in his 70s, he has spent nearly his decade in and out of hospitals with pneumonia, severe inflammation and so much pain that “it felt like his body was being pushed out of his pores.” I was. His tenacious primary care physician, Lisa Huber, sent him to a rheumatologist, hematologist, and eventually his NIH to find out what was going on with him if he hadn’t been diagnosed with Vexas. may not have been.
As for treatment, the diagnosis hasn’t meant much to Adams so far. Adams was due to have a transplant last year, but doctors discovered his right coronary artery was almost completely blocked. As of now, he remains dependent on the steroids he had to use since he fell ill.
