Leptin
A hormone produced by fat cells that sends signals to the hypothalamus, regulating the amount of fat in the body.
Ligand
A molecule or ion having the ability to bond with a protein.
Lupus
An a disease of the autoimmune system, in which anti-DNA antibodies bind to DNA, creating complexes that cause inflammatory reactions in the kidneys.
Lymphokines
Diverse and potent chemical messengers that bind to specific receptors as part of the body's immune response.
Messenger RNA (mRNA)
The protein that reads the DNA's code and communicates it to ribosomes so that new proteins can be built.
Multiple Sclerosis
A disease in which the body's immune cells attack the insulation material that surrounds nerve fibers in the spinal cord and brain. MS is characterized by recurrent muscle weakness, loss of muscle control, and in many cases, eventual paralysis.
Nephritis
A disease characterized by inflammation of the kidneys, often resulting from lupus.
Nephrology
The science dealing with the functions and diseases of the kidney.
Neurodegenerative
A term used to describe diseases (such as Parkinson's disease and Alzheimer's disease) which cause elements of the nervous system to deteriorate.
Neuroendocrine
A term describing interactions between the nervous system and the endocrine glands. Obesity and Type 2 diabetes are examples of neuroendocrine diseases.
Neuronal receptors
Nerves in the brain that receive incoming messages from proteins like neurotrophc factors.
Neuroprotection
The practice of minimizing neural damage done by diseases.
Neuroscience
Any of the sciences dealing with the nervous system.
Neurotrophic factors
Naturally-occurring proteins that aid in the survival of neurons and promote their growth.
Neutropenia
A blood disorder often induced by chemotherapy, occurring in as many as one in three patients receiving that treatment for cancer. NEUPOGEN® has been shown to reduce the effects of neutropenia.
Neutrophils
White blood cells produced in bone marrow that fight infection and repair the resulting tissue damage. NEUPOGEN® selectively stimulates the growth of neutrophils.
Nucleotide
The name given to an individual unit comprising the DNA double helix. A nucleotide contains one sugar, one phosphate, and one base.
Nucleus
The organelle within a living cell that contains genetic material and controls life functions.
Obesity
A neuroendocrine condition characterized by increased body weight, resulting from excessive accumulation of fat.
Oglionucleotides
Short chains of nucleotides made synthetically through the linking of several nucleotides. Oglionucleotides were manufactured to replicate the human DNA sequence for erythropoietin during the creation of EPOGEN®.
Ogliosaccaride
A type of unit added to a protein in the process of glycosylation. The production of Aranesp® involves the use of ogliosaccaride.
Oncology
The medical science relating to the development, diagnosis, treatment, and prevention of tumors.
Osteoarthritis
A type of arthritis characterized by chronic degeneration of joint cartilage.
Osteoporosis
A disease resulting in the weakening and slow healing of bones.
Osteoprotogerin (OPG)
A protein that has been shown to inhibit the absorption of bone, combating osteoporosis and bone metastasis caused by cancer. OPG was a discovery of Amgen's Genomics program.