β-estradiol is a potent mammalian estrogenic hormone produced by the ovary. Triggers the production of gonadotropins leading to ovulation. β-Estradiol is used to study cell differentiation and transformations (tumorigenicity). The pharmacology and HPLC determination of β-Estradiol…

Aprotinin is a single chain polypeptide (58 amino-acids) crosslinked by three disulfide bridges, showing competitive and reversible inhibiton of proteolytic and esterolytic activity. Aprotinin forms stable complexes with, and blocks the active sites of serine protease enzymes. It is found in bovine…

Melatonin is a hormone of the pineal gland. Hormone; mediates photoperiodicity in mammals; inhibits cerebellar nitric oxide synthetase; peroxynitrite scavenger. Melatonin has complex effects on apoptotic pathways, inhibiting apoptosis in immune cells and neurons but enhancing apoptotic cell…

Cholesterol is the principal sterol of the higher animals, found in all body tissues. It is the main constituent of gallstones and all biological membranes. Approximately 25% of total brain lipid is cholesterol. Cholesterol is suitable for use in liposome preparations.

Pure Canavalia ensiformis lectin (Con A) from Jackbean. Isolated by affinity chromatography on cross-linked dextran. Con A exists as a dimer below pH 5.0 and and at pH >7 it exists as a tetramer. Con-A is not a glycoprotein. The monomeric molecular weight of Con-A is 25,500. Con-A does not…

D-myo-Inositol is a growth factor for animals as well as microorganisms. Myo-Inositol is the most abundant form of polyols that serves as a structural element of secondary messengers in eukaryotic cells. Inositol or cyclohexane-1,2,3,4,5,6-hexol is a chemical compound, a sixfold alcohol (polyol) of…

Hydrocortisone, a primary glucocorticoid secreted by the adrenal cortex. It has three times the anti-inflammatory potency of corticosterone but much lower Na2+ retention potency. Hydrocortisone, known more formally as cortisone (INN, USAN, BAN), is a steroid hormone, produced by the zona…

Lecithin is the major membrane phospholipid in eukaryotic cells. In addition to being the major structural component of cellular membranes, it serves as a reservoir for several lipid messengers. It is the source of the bioactive lipids lysophosphatidylcholine, phosphatidic acid, diacylglycerol,…

Caffeine is a well-known drug commonly used as a mild stimulant, found in dietary sources such as coffee, tea, and cocoa. A central nervous system stimulant believed to act through adenosine receptors and monoamine neurotransmitters. It is an adenosine receptor antagonist and adenosine…

Cholesterol is the principal sterol of the higher animals, found in all body tissues. It is the main constituent of gallstones and all biological membranes. Approximately 25% of total brain lipid is cholesterol. Cholesterol, followed by the chemical suffix -ol for an alcohol, is an organic chemical…

Nicotinic acetylcholine receptor agonist isolated from Nicotiana tabacum and Nicotiana rustica. Nicotine Tartrate finds an application as the nicotine active in a wide range of smoking cessation products such as nicotine lozenges and nicotine sub-lingual tablets. (-)-Nicotine ditartrate is a…

Norethindrone is a synthetic progestin that possesses antiestrogenic effects, where in low doses it is progestational and in high doses it is antiestrogenic. It also causes a time-dependent loss of cytochrome P-450 when incubated in vitro with rat liver microsomal fractions and NADPH-generating…

Valproic Acid, Sodium Salt is a branched chain fatty acid which is reported to enhance central GABAergic neurotransmission and inhibit Na+ channels. Sodium Valproate is reported to cause inositol depletion, activate the ERK pathway, inhibit GSK-3α and GSK-3β. Valproic Acid has been…

Spermine is a naturally occuring polyamine that occurs in all eukaryotes, but is rare in prokaryotes. It is essential for cell growth in both normal and neoplastic tissue. Spermine is formed through the addition of an aminopropyl group to spermidine by spermine synthase. Spermine is strongly basic…

Hydrocortisone 21 acetate is a drug which inhibits or suppresses most inflammatory responses of an allergic, bacterial, traumatic or anaphylactic origin, as well as being immunosuppressant. They include the corticosteroids (e.g. betamethasone, dexamethasone, fluorometholone, hydrocortisone acetate,…

Methotrexate is a cell cycle arresting agent with varying effects. Methotrexate has been reported to arrest the cell cycle in late G1/S thus leading to the inhibition of the synthesis of DNA, RNA, thymidylates, and proteins. The main mechanism of action is reported to involve the inhibition of…

Hydroxyurea is a inhibitor of DNA synthesis in vivo, and an antiviral and antineoplastic agent which is S-phase specific. A ribonucleotide reductase inhibitor - inhibits by forming a free radical nitroxide that binds a tyrosyl free radical in the active site of the enzyme. Induces fetal hemoglobin…

Thymidine is a nucleoside composed of deoxyribose (a pentose sugar) joined to the pyrimidine base thymine. Deoxythymidine can be phosphorylated with one, two or three phosphoric acid groups, creating respectively dTMP, dTDP or dTTP (deoxythymidine mono- di- or triphosphate.) It exists in solid form…

Bilirubin is the principal pigment of bile and constituent of many biliary calculi and also found in blood. As the major end-product of the biological breakdown of heme, bilirubin is the chromophore responsible for coloration in various forms of jaundice. Bilirubin is suitable for use in the…

(+/-)-Epinephrine is also known as adrenaline and is a hormone as well as a neurotransmitter that is part of a group of monoamines called catecholamines. It is used medically to treat a number of cardiac and respiratory conditions as well as serving as a local anesthetic. …

Dithranol (1, 8 - dihydroxy-9-anthrone) is also called as anthralin. It is a vital topical antipsoriatic drugs. Dithranol, an athracene derivative, is a free radical generating mitochondrial poison that induces apoptosis in keratinocytes. Dithranol may be used as a matrix for matrix assisted…