At present, the theory of telomerase is only a view, and there is no conclusion. Therefore, even if telomerase can be repaired, human life may not be prolonged, and human beings may not be immortal.

Telomerase is an enzyme responsible for telomere extension in cells and an alkaline nucleoprotein reverse transcriptase, which can add telomere DNA to the chromosome end of eukaryotic cells. Telomeres play an important role in maintaining chromosome stability and cell activity in cells of different species. Telomerase can prolong shortened telomeres (shortened telomeres have limited cell replication ability), thus enhancing cell proliferation ability in vitro. Telomerase activity is inhibited in normal human tissues and reactivated in tumors, and telomerase may participate in malignant transformation. Telomerase plays an important role in maintaining telomere stability, genome integrity, long-term cell activity and potential ability of continuous proliferation. Telomerase exists to fill the defect of DNA replication, that is, by prolonging telomere repair, telomere will not be lost due to cell division, thus increasing the number of cell divisions.

However, in normal human cells, the activity of telomerase is strictly regulated, and active telomerase can only be detected in hematopoietic cells, stem cells and germ cells that must constantly divide. When cells differentiate and mature, they must be responsible for the needs of different tissues in the body and perform their duties, so the activity of telomerase will gradually disappear. It is not important for cells to continue to divide, but differentiated cells will undertake a more important mission, that is, to make tissues and organs operate and prolong life.