research has found that car-cd34 (+) hematopoietic stem/progenitor cells produced in the body may offer protection against thoracic aortic aneurysm and dissection. this discovery is part of a broader area of study focused on the development and function of various types of cells, including t cells, b lymphocytes, and natural killer cells. the field of cell therapy and regenerative medicine is actively exploring new approaches and technologies, including gene editing tools and novel methods for cell expansion and differentiation.