Sunday, January 18, 2015
One Of The Many Uses of the HeLa Cell
As is known to many scientists and people worldwide, the HeLa cells which originated from Henrietta Lacks, has helped make many medical and scientific breakthroughs and advancements. One of the fields that received a lot of help from HeLa cells was virology.
Friday, January 16, 2015
Karyotypes: HeLa cells vs normal cells
There are many way that the two karyotypes are extremely different. One is that, in the HeLa cells there are different numbers of chromotids compared to the normal cell. Ann Fischer of USCF, UCLA and UC Berkeley even states that "[HeLa cells] have the strangest karyotype. They have 3 copies of this, and two copies of that and 5 copies of that. They're not normal." At the bottom of the picture of the HeLa karyotype are different pieces of chromosomes being compressed together, there isn't a place where the jumbled chromosomes can be settled. These karyotypes were probably caused by the impaired assortment of the chromosomes during meiosis.
Behavior of HeLa cells and other cancer cells
HeLa cells are very different from other cancer cells but they do share a set of behaviors that classify them as cancer cells. First and foremost, HeLa cells obviously have uncontrolled growth, they jump start their growth by themselves regardless of what's going on around them. Because of this growth, the cancer cells ignore any signals that tell them to stop dividing and expand their numbers. A significant characteristic of HeLa cells and other cultured cancer cells, is that they can exist in conditions that would kill other cells, and adapt to almost any environment. Since they are so powerful, HeLa cells have been known to occasionally contaminate other cell lines used for research.
A possible explanation of the HeLa cells growth behavior can happen in the metaphase during mitosis. During metaphase ensures that the spindles are properly attached to the sister chromatids, but if the spindles are not properly attached the cell cannot continue on through mitosis and causes a mutation which can lead to cancer, Fortunately it is not easy for a normal cell to turn into a cancer cell.
How did Henrietta Lacks cancer?
Henrietta Lacks had internal bleeding, due to the harsh pain, she went to the hospital and was diagnosed with cervical cancer.
There are many possibilities of how Henrietta got cancer. There might have been a mutation while her cells were undergoing mitosis and her sister chromatids might have not separated evenly. Another possibility is that her CDK did not recognize any threats resulting in a tumor growing and eventually causing cancer.