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Diseases, Conditions, Syndromes

New study identifies T cells involved in the autoimmune disease AAV

Many patients with the autoimmune disease ANCA-associated vasculitis (AAV) suffer a high risk of disease relapse despite treatment. Karolinska Institutet researchers have now identified T cells that contribute to the destruction ...

Health

PFAS can suppress white blood cell's ability to destroy invaders

In a new study, researchers found that the PFAS chemical GenX suppresses the neutrophil respiratory burst—the method white blood cells known as neutrophils use to kill invading pathogens. The study is an important first ...

Diseases, Conditions, Syndromes

Sensory cells taste cerebrospinal fluid to fight brain infections

Sensory neurons pick up information from our senses and relay it to the rest of the nervous system. But this is not their only mission. In a new study published in the journal Current Biology, Claire Wyart at the Paris Brain ...

Diseases, Conditions, Syndromes

Researcher identifies potential cause of 'long COVID'

Even though the COVID-19 public health emergency classification will expire this spring, the lingering effects of the pandemic remain. A constant puzzle to solve since the first year of the pandemic has been "long COVID," ...

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White blood cell

White blood cells (WBCs), or leukocytes (also spelled "leucocytes"), are cells of the immune system defending the body against both infectious disease and foreign materials. Five different and diverse types of leukocytes exist, but they are all produced and derived from a multipotent cell in the bone marrow known as a hematopoietic stem cell. Leukocytes are found throughout the body, including the blood and lymphatic system.

The number of leukocytes in the blood is often an indicator of disease. There are normally between 4×109 and 1.1×1010 white blood cells in a litre of blood, making up approximately 1% of blood in a healthy adult. An increase in the number of leukocytes over the upper limits is called leukocytosis, and in leukopenia, this number is much lower than the lower limit. The physical properties of leukocytes, such as volume, conductivity, and granularity, may change due to activation, the presence of immature cells, or the presence of malignant leukocytes in leukemia.

This text uses material from Wikipedia, licensed under CC BY-SA

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