protect

Protectin D1 (Neuroprotectin D1) is a neuroprotectin produced by neuronal cells and is a potential cardioprotective agent.Protectin D1 attenuates myocardial ischemia reperfusion injury and inhibits imiquimod-induced psoriasis-like skin inflammation by modulating the PI3K AKT signaling pathway.

Compound 11, labeled as a weak Hepatoprotective agent-1, is a naturally occurring substance extracted from the fruits of Arctium lappa L. It demonstrates modest hepatoprotective effects when applied at a concentration of 10 μM [1].

Lipopolysaccharides (LPS) derived from Escherichia coli 055:B5, are a unique component of the cell wall of Gram-negative bacteria. They are composed of three regions: lipid A, oligosaccharide core, and O-specific polysaccharide (O-antigen). Lipopolysaccharides help maintain the integrity of the cell outer membrane and protect bacteria from damage by bile salts and lipid antibiotics. Lipopolysaccharides are highly immunogenic antigens that can enhance immune responses and can be used to construct inflammatory models.

Salidroside is a bioactive phenolic glycoside compound isolated from Rhodiola rosea and is a prolyl endopeptidase inhibitor. Salidroside can alleviate cachexia symptoms in a tumor cachexia mouse model by activating mTOR signaling and protect dopaminergic neurons by enhancing PINK1 Parkin-mediated mitochondrial autophagy. Salidroside can also inhibit the growth of cancer cells by regulating the CDK4-cyclin D1 pathway to block the G1 phase and or regulating the Cdc2-cyclin B1 pathway to block the G2 phase.

3-Methylxanthine, a xanthine derivative, is a cyclic guanosine monophosphate (GMP) inhibitor with an IC50 of 920 μM on guinea-pig isolated trachealis muscle. It inhibits xanthine crystallization and could protect patients with xanthinuria from developing renal xanthine calculi.

Silibinin (Silybin) is the major active constituent of silymarin, a standardized extract of the milk thistle seeds, containing a mixture of flavonolignans consisting of silibinin, isosilibinin, silicristin, silidianin and others. Silibinin itself is a mixture of two diastereomers, silybin A and silybin B, in approximately equimolar ratio. Both in vitro and animal research suggest that silibinin has hepatoprotective (antihepatotoxic) properties that protect liver cells against toxins. Silibinin has also demonstrated in vitro anti-cancer effects against human prostate adenocarcinoma cells, estrogen-dependent and -independent human breast carcinoma cells, human ectocervical carcinoma cells, human colon cancer cells, and both small and nonsmall human lung carcinoma cells.

L-Histidine (L-(-)-Histidine) is a semi-essential amino acid (children should obtain it from food) needed in humans for growth and tissue repair, L-Histidine is important for maintenance of myelin sheaths that protect nerve cells and is metabolized to the neurotransmitter histamine. Histamines play many roles in immunity, gastric secretion, and sexual functions. L-Histidine is also required for blood cell manufacture and protects tissues against damage caused by radiation and heavy metals.

1. Oxyresveratro can inhibit tyrosinase activity. 2. Oxyresveratro is useful to trauma models, as toxicity to glia could be beneficial by inhibiting reactive gliosis. 3. Oxyresveratrol (trans-Oxyresveratrol) has antioxidant activity, can reduce neuronal oxidative damage and protect hepatocytes against oxidative stress and mitochondrial dysfunction, which may be associated with activation of Nrf2.

1-Aminocyclopropane-1-carboxylic acid (ACC) is an intermediate in the synthesis of ethylene, the plant hormone responsible for biological processes ranging from seed germination to organ senescence. It is a small molecule agonist at the glycine modulatory site of the NMDA receptor (EC50 = 0.7-0.9 μM) in the presence of low levels (1 μM) of glutamate and as a competitive antagonist at the glutamate-binding site on NMDA receptors (EC50 = 81.6 nM) with high levels (10 μM) of glutamate.2 This compound has been reported to protect against neuron cell death in vivo models of ischemia by enabling moderate levels of NMDA receptor activation and attenuating any excess NMDA receptor signaling that may lead to neurotoxicity.

Pyrroloquinoline quinone (PQQ), as a well-known redox enzyme cofactor, PQQ can protect NS PCs against glutamate toxicity associated with ROS-mediated mitochondrial pathway,

2',4'-Dimethylacetophenone is a chemical that can be used in biological research. The compound can be used in gas chromatography to detect aldosterone aroma in tobacco compounds and can be used to protect food products.

2,4'-Dihydroxybenzophenone can effectively protect C57BL 6J mice from APAP-induced hepatotoxicity. Its mechanisms might be associated with its Antioxidant activity.

Pregnenolone acetate is a powerful neurosteroid, the main precursor of various steroid hormones including steroid ketones. It acts as a signaling-specific inhibitor of cannabinoid CB1 receptor, inhibits the effects of tetrahydrocannabinol (THC) that are mediated by the CB1 receptors. It can protect the brain from cannabis intoxication

Mogroside V is a widely used sweetener, has in vitro AMPK activating effect, it also has anti-inflammatory potential in murine macrophages and a murine ear edema model, and has the potential to protect against LPS-induced airway inflammation in a model of ALI. Mogroside V has antioxidant properties and possesses tumor growth inhibitory activity in pancreatic cancer models.

Morroniside would act as a regulator of hepatic inflammatory reactions and lipid metabolism in db db mice. It exhibits protective effects against diabetic renal damage and human umbilical vein endothelial cells, by inhibiting hyperglycemia and oxidative s

Hydroxysafflor yellow A (Safflomin A) inhibits adipogenesis by increasing HSL promoter activities, effectively protects the liver from long-term alcohol injury by enhancing antioxidant capacity and inhibiting the expression of TGF-β, prevents steroid-induced avascular necrosis of the femoral head by inhibiting primary bone marrow-derived mesenchymal stromal cells, and exhibits anti-tumor effects.

Vicenin 2 is an angiotensin-converting enzyme (ACE) inhibitor (IC50=43.83 μM) from the aerial parts of Desmodium styracifolium. Vicenin 2 is an inhibitor of α-glucosidase, PTP1B, and RLAR. Vicenin 2 has hepatoprotective, anti-cancer, antioxidant and anti-inflammatory activities, and DTL co-administration is more effective than either of the single agents in androgen-independent prostate cancer. Vicenin 2 might be a useful lead for the development of multiple target-oriented therapeutic modalities for the treatment of diabetes and diabetes-associated complications. Vicenin 2 could act as a UV light barrier to protect the plants.

Lipopolysaccharides, Escherichiacoli (E. coli O111:B4) are derived from Escherichia coli O111:B4 and are a unique component of the cell wall of Gram-negative bacteria. They are composed of three regions: lipid A, oligosaccharide core, and O-specific polysaccharide (O-antigen). Lipopolysaccharides, Escherichiacoli help maintain the integrity of the cell outer membrane and protect bacteria from bile salts and lipid antibiotics.

1. Cornuside (Comuside) has immunomodulatory activity . 2. Cornuside suppresses expression levels of cytokine-induced proinflammatory and adhesion molecules in the human endothelial cells. 3. Cornuside can treat myocardial I R and protect the liver from CCl4-induced acute hepatotoxicity, by reducing oxidative stress and suppressing inflammatory responses. 4. Cornuside has anti-inflammatory activity by downregulations of iNOS and COX-2 due to NF-κB inhibition as well as the negative regulation of ERK1 2, p38, and JNK1 2 phosphorylations in RAW 264.7 cells. 5. Cornuside has protective potential against cerebral ischemic injury, may be due to the suppression of intracellular Ca(2+) elevation and caspase-3 activity, and improvements in mitochondrial energy metabolism and antioxidant properties.

Luteolinidin chloride is a natural product. It is a potent CD38 inhibitor which can protect the heart against I R injury with preservation of eNOS function and prevention of endothelial dysfunction in vivo.

5-Methoxy-DL-tryptophan is a molecule produced by endothelial cells to modulate inflammatory responses and protect against systemic inflammation.

Gypenoside XIII, a member of the gypenosides extracted from *Gynostemma pentaphyllum*, provides protection against cardiovascular diseases, particularly atherosclerosis.

Oleuroside can protect against mitochondrial dysfunction in models of early Alzheimer's disease and brain ageing.

Indican (Indoxyl-β-D-glucoside) is a natural protective compound that is used to protect the liver.