rapamycin

Rapamycin (AY 22989) is a natural product of macrolides, an mTOR inhibitor with specificity (HEK293 cells: IC50=0.1 nM). Rapamycin has immunosuppressive activity and induces autophagy.

Demethoxyrapamycin is a new antifungal antibiotic agent which is co-produced with rapamycin by Streptomyces hygroscopicus.

Rotundic acid (Rutundic acid), a natural compound, exhibit cytotoxic activities toward human hepatocellular carcinoma (HepG2), malignant melanoma (A375), SCLC (NCI-H446), breast cancer (MCF-7), and colon cancer (HT-29) cell lines.

Polyphyllin D induces apoptosis via the mitochondrial apoptotic pathway as evidenced by decreased Bcl-2 expression levels, disruption of MMP and increased Bax, cytochrome C, and cleaved-caspase-3 levels. Polyphyllin D has an anti-angiogenic effect. Polyphyllin D has toxicity in human RBCs as well as its underlying mechanism for the hemolysis and eryptosis/erythroptosis. Polyphyllin D has strong anticancer activity, can overcome drug resistance in R-HepG2 cells and elicit programmed cell death via mitochondrial dysfunction.

Dihydromyricetin (Ampelopsin) is a natural antioxidant flavonoid from Ampelopsis grossedentata. Dihydromyricetin is a potent inhibitor of dihydropyrimidinase with an IC50 of 48 μM. Dihydromyricetin can activate autophagy by inhibiting mTOR signaling.

WDB002, a natural product belonging to the FK506/rapamycin family, targets CEP250 and may be employed in COVID-19 research [1].

25(R,S)-Ruscogenin is a natual product.

Hederacolchiside A1 (Raddeanoside R13) shows anti-leishmanial activity, it exhibits a strong antiproliferative activity on all stages of development of the parasite by altering membrane integrity and potential. Hederacolchiside A1 shows antiproliferation activities in three cancer cell lines with the IC50 value of 2.4 uM, it exhibits a preferential cytotoxicity on a pigmented melanoma cell line. It suppresses proliferation of tumor cells by inducing apoptosis through modulating PI3K/Akt/mTOR signaling pathway.

(+)-Usnic acid (D-Usnic Acid) is a naturally occurring dibenzofuran derivative found in several lichen species.

Salidroside (Rhodioloside) is a bioactive phenolic glycoside compound isolated from Rhodiola crenulata. It is a prolyl endopeptidase Inhibitor.

Cyclovirobuxine D (Bebuxine) is extracted from Buxus microphylla.

L-Leucine ((S)-Leucine) is one of nine essential amino acids in humans (provided by food), L-Leucine is important for protein synthesis and many metabolic functions. L-Leucine contributes to regulation of blood-sugar levels; growth and repair of muscle and bone tissue; growth hormone production; and wound healing. L-Leucine also prevents breakdown of muscle proteins after trauma or severe stress and may be beneficial for individuals with phenylketonuria. L-Leucine is available in many foods and deficiency is rare.

Arnicolide D is a sesquiterpene lactone. Arnicolide D isolates from Centipeda minima. Arnicolide D modulates the cell cycle, activates the caspase signaling pathway and inhibits the PI3K/AKT/mTOR and STAT3 signaling pathways. Arnicolide D inhibits Nasopharyngeal carcinoma (NPC) cell viability in a concentration- and time-dependent manner. Arnicolide D exerts strong cytotoxic activity on the human colon carcinoma HT-29 cell line.

Daphnetin (7,8-Dihydroxycoumarin), a natural coumarin derivative, is a protein kinase inhibitor with inhibitory for EGFR (IC50: 7.67 μM), PKA (IC50: 9.33 μM), and PKC (IC50: 25.01 μM), also exhibit anti-oxidant and anti-inflammatory activities.