Chromosome theory of cancer

Chromosome instability and cancer

Cancer cells often exhibit chromosomal abnormalities, including chromosomal rearrangements (such as translocations), deletions, and duplications. These abnormalities can disrupt the normal function of genes involved in cell cycle regulation, leading to uncontrolled cell growth and tumor formation. The chromosome theory of cancer is a long-standing idea originated from the work of Theodor Boveri, a German biologist, in the early 20th century. Boveri's studies on sea urchin eggs provided early evidence that abnormal chromosome numbers could lead to developmental defects, leading him to propose a connection between chromosomal abnormalities and cancer. Further research by scientists such as David Hungerford and Peter Nowell in the 1960s identified specific chromosomal abnormalities in cancer cells, such as the Philadelphia chromosome in chronic myeloid leukemia, providing more support for the chromosomal theory of cancer. The chromosomal theory of cancer is a fundamental concept in cancer biology that suggests cancer is caused by genetic changes, particularly alterations in the structure or number of chromosomes in cells. These changes can lead to uncontrolled cell growth, a hallmark of cancer.