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The Importance of the Immune System

The Immune System

The immune system is the body’s defense against infectious organisms and other invaders.

Through a series of steps called the immune response, the immune system attacks organisms and substances that invade body systems and cause disease.

The immune system is made up of a network of cells, tissues, and organs that work together to protect the body.

One of the important cells involved are white blood cells, also called leukocytes, which come in two basic types that combine to seek out and destroy disease-causing organisms or substances.

Leukocytes are produced or stored in many locations in the body, including the thymus, spleen, and bone marrow.

For this reason, they’re called the lymphoid organs. There are also clumps of lymphoid tissue throughout the body, primarily as lymph nodes, that house the leukocytes.

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Cancer ‘Vaccine’ Remembers Disease & Fights it Years Later

Doctor_preparing_a_vaccineA revolutionary new cancer treatment that remembers the disease and acts like a watchman to prevent it ever returning is being developed by scientists.

Researchers are engineering immune cells so that they not only boost the body’s own natural defences to fight tumours, but stand guard for a lifetime – acting effectively like a vaccine.

Scientists say it is like having a “living drug”, which is constantly vigilant to the return of cancer and quickly removes it from the body.

A new study, presented at the American Association for the Advancement of Science annual meeting in Washington, has proven for the first time that engineered “memory T-cells” can persist in the body for at least 14 years.

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Unprecedented Results Using T-Cell Therapy


Initial clinical trials of patients terminally ill with Acute Lymphoblastic Leukaemia (ALL) have thrilled scientists because the majority of patients were rid of all symptoms after the cancer cells were targeted with the immune system’s T-Cells.

In this study,35 patients with ALL were treated with Cars-modified T-cells; 94% went into remission, although symptoms could reappear at some stage in the future.

Patients with other blood cancers also exhibited response rates in excess of 80 % with the majority of them showing complete remission. In excess of 40 patients with lymphoma were also been treated, with remission rates of more than 50%. A group with non-Hodgkin’s lymphoma also showed evidence of diminished cancer symptoms in more than 80% of cases.

The results are “unprecedented” and exemplify astonishing medical breakthroughs.

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Human Immune System’s Warrior ‘T Cells’ Battling against a Cancer Cell

T-cells-NIHThe combatants are tiny – one tenth of the width of a human hair – but the stakes could not be higher, as a human immune ‘T Cell’ battles against a cancer cell.

The video shows how our immune systems use assassin cells known as ‘cytotoxic T cells’ to fight against invaders such as cancer cells.

Cytotoxic T cells are just 10 microns in length: approximately one-tenth the width of a human hair.


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