Alkaloids

Staurosporine is a potent, ATP-competitive and non-selective inhibitor of protein kinases with IC₅₀s of 6 nM, 15 nM, 2 nM, and 3 nM for PKC, PKA, c-Fgr, and Phosphorylase kinase respectively. Staurosporine also inhibits TAOK2 with an IC₅₀ of 3 μM. Staurosporine is an apoptosis inducer.

ATP (Adenosine 5'-triphosphate) is a central component of energy storage and metabolism in vivo. ATP provides the metabolic energy to drive metabolic pumps and serves as a coenzyme in cells. ATP is an important endogenous signaling molecule in immunity and inflammation. ATP can activate the NLRP3 inflammasome and induce IL-1β and chemokines secretion. ATP has anti-bacterial infection effects and can protect mice against bacterial infection in mice.

Nicotinamide is a form of vitamin B3 or niacin. Nicotinamide Hydrochloride inhibits SIRT2 activity (IC₅₀: 2 μM). Nicotinamide also inhibits SIRT1. Nicotinamide increases cellular NAD₊, ATP, ROS levels. Nicotinamide inhibits tumor growth and improves survival. Nicotinamide also has anti-HBV activity.

Isoprenaline (Isoproterenol) hydrochloride is a non-selective, orally active β-adrenergic receptor agonist. Isoprenaline has potent peripheral vasodilator, bronchodilator, and cardiac stimulating activities. Isoprenaline can be used for the research of bradycardia and bronchial asthma.

SN-38 is an active metabolite of the Topoisomerase I inhibitor Irinotecan. SN-38 can bind to RPL15. SN-38 inhibits DNA and RNA synthesis with IC₅₀s of 0.077 and 1.3 μM, respectively. SN-38 is a payload of sacituzumab govitecan (HY -132254).

Mianserin hydrochloride (Org GB 94) is an orally active H1 receptor antagonist. Mianserin hydrochloride can activate κ-opioid receptor and octopamine receptor. Mianserin hydrochloride increases ERK1/2 and CREB phosphorylation, and antagonizes full κ-opioid agonist and Dynorphin A (HY-P1333)-induced MAPK phosphorylation. Mianserin hydrochloride modulates social and exploratory behaviour, raises electroconvulsive thresholds. Mianserin hydrochloride can be used for the research of neurological disease, such as depression and epilepsy.

Cephaeline ((-)-Cephaeline; NSC 32944) is a ferroptosis inducer, with broad-spectrum anticancer and antiviral activities. Cephaeline induces ferroptosis (Ferroptosis) by upregulating p53, inhibiting NRF2, activating ULK3, downregulating the expressions of SLC7A11 and GPX4 in a p53-dependent manner, reducing GSH and mitochondrial membrane potential, and increasing lipid peroxidation and iron accumulation. Cephaeline inhibits cancer cell proliferation, migration and tumor growth. Cephaeline inhibits Ebola virus (EBOV) VLP entry and infection, with IC₅₀ values of 3.27 μM and 22.18 μM respectively; it also inhibits Zika virus (ZIKV) NS5 RdRp activity (IC₅₀ = 976 nM), and binds to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) RdRp and N protein, with K_d values of 8.9 μM and 53.8 μM respectively. Cephaeline can be used in studies related to breast cancer, lung cancer, COVID-19, EBOV and ZIKV infections.

Vinburnine ((-)-Eburnamonine; (-)-Vincamone) is an orally active, blood-brain barrier permeable immunomodulator and apoptosis inducer. Vinburnine drives the secretion of IL-24 by activating the P38/MAPK/ATF3 signaling axis. Vinburnine induces reactive oxygen species production and DNA damage in cancer cells, thereby inhibiting cancer cell proliferation, activating the apoptotic cascade, and enhancing CD8+ T cell function to remodel the tumor immune microenvironment. Vinburnine can be used in the research of diseases such as melanoma.

Caerulein is a decapeptide and a potent cholecystokinin receptor agonist. Caerulein is a safe and effective cholecystokinetic agent with a direct spasmogenic effect on the gallbladder muscle and bile ducts.

Acetaminophen (Paracetamol) is a selective cyclooxygenase-2 (COX-2) inhibitor with an IC₅₀ of 25.8 μM; is a widely used antipyretic and analgesic agent.. Acetaminophen is a potent hepatic N-acetyltransferase 2 (NAT2) inhibitor. Acetaminophen induces ferroptosis and leads to acute liver injury in mice model.

Puromycin dihydrochloride is the dihydrochloride salt of puromycin. Puromycin is an aminoglycoside antibiotic that inhibits protein synthesis.

Camptothecin (CPT), a kind of alkaloid, is a DNA topoisomerase I (Topo I) inhibitor with an IC₅₀ of 679 nM. Camptothecin (CPT) exhibits powerful antineoplastic activity against colorectal, breast, lung and ovarian cancers, modulates hypoxia-inducible factor-1α (HIF-1α) activity by changing microRNAs (miRNA) expression patterns in human cancer cells.

Kainic acid is a potent excitotoxic agent. Kainic acid hydrate also is an agonist for a subtype of ionotropic glutamate receptor. Kainic acid induces seizures.

Nicotinamide riboside Chloride, an orally active NAD⁺ precursor, increases NAD⁺ levels and activates SIRT1 and SIRT3. Nicotinamide riboside Chloride is a source of vitamin B3 (niacin) and enhances oxidative metabolism, protection against high fat diet-induced metabolic abnormalities. Nicotinamide riboside Chloride reduces cognitive deterioration in a transgenic mouse model of Alzheimer’s disease.

Vincristine (Leurocristine; NSC-67574; 22-Oxovincaleukoblastine) sulfate is a microtubule inhibitor that disrupts microtubule polymerization by binding to β-tubulin (with a K_i of 85 nM in bovine), arrests the cell cycle and induces apoptosis. Vincristine sulfate inhibits cell replication, tumor blood flow and the proliferation of various cancer cells, while triggering effects such as oxidative stress, inflammation, calcium overload, epithelial-mesenchymal transition and peripheral neuropathic pain. Vincristine sulfate upregulates the expression of various transporters and nuclear receptors, and enriches gastric cancer stem-like cells. Vincristine sulfate is used in research related to various tumors including acute lymphoblastic leukemia, lymphoma, melanoma, gastric cancer, solid tumors and sarcomas.

Pilocarpine Hydrochloride is a potent M3-type muscarinic acetylcholine receptor (M3 muscarinic receptor) agonist.

Propranolol hydrochloride is a nonselective and BBB-permeableβ-adrenergic receptor (βAR) antagonist, has high affinity for the β1AR and β2AR with K_i values of 1.8 nM and 0.8 nM, respectively. Propranolol hydrochloride inhibits [³H]-DHA binding to rat brain membrane preparation with an IC₅₀ of 12 nM. Propranolol hydrochloride is used for study of hypertension, pheochromocytoma, myocardial infarction, cardiac arrhythmias, angina pectoris, and hypertrophic cardiomyopathy.

Propranolol is a nonselective and BBB-permeable β-adrenergic receptor (βAR) antagonist, has high affinity for the β1AR and β2AR with K_i values of 1.8 nM and 0.8 nM, respectively. Propranolol inhibits [³H]-DHA binding to rat brain membrane preparation with an IC₅₀ of 12 nM. Propranolol is used for the study of hypertension, pheochromocytoma, myocardial infarction, cardiac arrhythmias, angina pectoris, and hypertrophic cardiomyopathy.

Berberine chloride is an alkaloid that acts as an antibiotic. Berberine chloride induces reactive oxygen species (ROS) generation and inhibits DNA topoisomerase. Antineoplastic properties.

Monocrotaline is an 11-membered macrocyclic pyrrolizidine alkaloid. Monocrotaline inhibits OCT-1 and OCT-2 with IC₅₀s of 36.8 µM and 1.8 mM, respectively. Monocrotaline has antitumor activity and is cytotoxic to hepatocellular carcinoma cells. Monocrotaline is used to induce a model of pulmonary hypertension in rodents. ^[2][6][8].