Enzyme Modulators

<p>Inhibits tankyrase (TNKS1 and TNKS2 with IC50 values of 11 and 4 nM respectively), by binding to the catalytic poly-ADP-ribose polymerase (PARP) domain. This stabilizes cytoplasmic protein Axin, mediating β-catenin depletion and thereby suppresses Wnt signalling pathway. XAV 939 has anti-proliferative and pro-apoptotic effects on neuroblastoma and colorectal cancer cells.</p>

<p>Histone acetyltransferase inhibitor of p300/CBP; anti-proliferative</p>

<p>Aminopterin is an antineoplastic agent and antifolate, which is a synthetic derivative of pteroylglutamic acid. It functions as a chemotherapeutic agent by inhibiting dihydrofolate reductase, an enzyme crucial in the folic acid pathway, thereby preventing the conversion of dihydrofolate to tetrahydrofolate. This disruption leads to impaired synthesis of purine nucleotides and thymidylate, which are essential for DNA synthesis and cell division.</p>

<p>Fluvastatin is a statin that lowers blood cholesterol and triglycerides by inhibiting HMG-CoA reductase, an enzyme that plays a critical role in the synthesis of cholesterol. Fluvastatin has also been shown to reduce the incidence of myocardial infarction, and to reduce atherosclerotic lesions in animal models, reducing the incidence of cardiovascular disease. Fluvastatin also has been shown to inhibit the activation of toll-like receptor 4 (TLR4) by lipopolysaccharide (LPS), which may be related to its anti-inflammatory effects. Furthermore, through lowering blood cholesterol, Fluvastatin also inhibits tubulointerstitial injury and prevents renal damage caused by high concentrations of the lipid.</p>

<p>Apixaban is an anticoagulant agent used for the prophylaxis of stroke and deep vein thrombosis leading to pulmonary embolism. This drug is an inhibitor of factor Xa and prothrominase. As a result, this prevents the formation of a thrombus.</p>

<p>Rosuvastatin is a drug that belongs to the group of statins. It is used for the treatment of high cholesterol and as an adjunct therapy for patients with coronary heart disease. Rosuvastatin reduces serum cholesterol by inhibiting HMG-CoA reductase, which is the rate-limiting enzyme in the production of cholesterol. Furthermore, this drug has been shown to have anti-inflammatory properties, which may be due to its ability to inhibit prostaglandin synthesis.</p>

<p>Inhibitor of folate synthesis; folic acid analogue</p>

<p>A potent and selective c-Met inhibitor. Anti-tumour activity demonstrated in xenograft models in vivo. Forms a thioether conjugate by reacting with thiol groups in proteins. Non-small-cell lung carcinoma (NSCLC) tumour cells that overexpress c-MET have increased sensitivity to AMG458.</p>

<p>H+/K+ ATPase inhibitor</p>

<p>Proteosome inhibitor; pro-apoptotic; has anti-myeloma activity</p>

<p>Phosphodiesterase inhibitor</p>

<p>Cis/trans-form of GK 563 [2351820-19-2]</p>

<p>R-(-)-Arundic acid is a chiral compound, which is a derivative of arundic acid specifically designed for enantiomeric purity. It is sourced through synthetic organic chemistry processes, allowing for precise control over its stereochemistry. The mode of action of R-(-)-Arundic acid involves the inhibition of astrocyte activation by modulating the synthesis of certain cytokines and inflammatory mediators. This mechanism provides a neuroprotective effect, making it a valuable tool in the study of neurodegenerative diseases and brain injuries.</p>

<p>Inhibitor of poly (ADP-ribose) polymerase enzyme; antineoplastic</p>

<p>Diacerein is a slow-onset anthraquinone IL-1 inhibitor that is used in the treatment of joint diseases such as osteoarthritis. This drug is also being studied for the treatment of insulin resistance and diabetes mellitus. Diacerein works to decrease inflammation and cartilage destruction by reducing the level of interleukin-1.</p>

<p>Cetilistat is a drug that is used to treat obesity. This drug inhibits the enzyme pancreatic lipase and so it prevents triglycerides from being hydrolyzed into absorbable free fatty acids.</p>

<p>Inhibitor of proteaseγ‐secretase, which allows to modulate of the activity of γ‐secretase substrates Notch, E-cadherin, ErbB4, and amyloid precursor protein (APP). The compound can inhibit the growth of tongue carcinoma cells by arresting cell cycle in G0–G1 phase, modulate the activity of Notch1 receptor and Caspase-3 protease and induce apoptosis. It was also demonstrated that this inhibitor reduces the levels of β-amyloid peptide in the brain of mice model for Alzheimer’s disease. This compound also enhances the neuronal differentiation embryonic cells.</p>

<p>Inhibitor of 8-oxoguanine DNA glycosylase OGG1 with IC50 of 0.059 μM and excellent specificity over other DNA repair enzymes. OGG1 and its substrate 8-oxoguanine are involved in mutagenesis, genotoxicity, inflammation and cancer. The compound can cause accumulation of 8-oxoguanine in DNA in vitro and is a potent tool for the study of OGG1 biology.</p>

<p>Inhibitor of tyrosinase in melanocytes: skin whitener</p>

<p>Casein kinase (CK1ε and CK1Ύ) inhibitor</p>

<p>Dual COX/5-LO inhibitor; anti-inflammatory; analgesic</p>

<p>Monoamine oxidase-B inhibitor; anti-parkinsonian; neuroprotective</p>

<p>AZD 1152 is an Aurora kinase inhibitor, which is a type of small-molecule therapeutic agent. It is derived from the pharmaceutical research conducted by AstraZeneca. Its primary mode of action involves the selective inhibition of Aurora B kinase, an enzyme crucial for the regulation of mitosis. By interfering with this enzyme, AZD 1152 disrupts the normal progression of cell division, leading to the inhibition of proliferation and induction of apoptosis in rapidly dividing cells.</p>

<p>An inhibitor of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase that reduces total cholesterol and low-density lipoprotein (LDL). Cerivastatin is cardioprotective and anti-atherosclerotic. Cerivastatin inhibits the expression of the atherosclerotic genes monocyte chemoattractant protein-1 (MCP-1) and C-C chemokine receptor type 2 (CCR2), whilst inducing the expression of Kruppel-like factor 2 (KLF2).</p>

<p>MET tyrosine kinase inhibitor; anti-proliferative; pro-apoptotic</p>

<p>Omeprazole is a proton pump inhibitor (PPI) that inhibits the production of gastric acid in the stomach. This is due to Omeprazole binding through a stable disulphide bond to the H+/K+ ATPase enzyme found on parietal cells, and preventing hydrogen ion transport. Consequently, gastric acid secretion is supressed. As a PPI, Omerprazole can be used to treat disorders where gastric acid is over-secreted. Examples of these disorders are gastroesophageal reflux disease (GERD) and peptic ulcer disease.</p>

<p>Acecelofenac is a non-steroidal anti-inflammatory drug that is used in the treatment of osteoarthritis, arthritis, and ankylosing spondylitis. This drug is also a cyclooxygenase inhibitor and works by inhibiting this enzyme so that pain and inflammation is reduced.</p>

<p>Rivastigmine is a cholinergic agent that is used in the treatment of dementia in Parkinson’s and Alzheimer’s disease. This drug is a carbamate derivative that binds to and inactivates cholinesterase such as acetylcholinesterase and butyrylcholinesterase. This leads to an increase concentration of acetylcholine at cholinergic synapse.</p>

<p>An irreversible GSK-3β inhibitor that reduces phosphorylation of tau proteins, protects from neuronal loss and has cognitive and behavioural benefits in murine models. Studied for its potential as a therapeutic agent in Alzheimer’s disease and other neurodegenerative diseases. Tideglusib was also shown to inhibit the main protease Mpro from the SARS-CoV-2 virus with IC50 of 1.55 μM.</p>

<p>Inhibitor of chymotrypsin</p>

<p>A selective and potent inhibitor of phosphodiesterase 2 (PDE2). Raises cAMP and cGMP levels in neurons, improves social recognition and object memory in murine animals. Reverses anxiolytic effects induced by oxidative stress in mice by blocking cGMP-PKG signaling.</p>

<p>Inhibitor of immunophilin FKBP12 and mTOR signalling with immunosuppressant activity. Zotarolimus inhibits proliferation of endothelial cells and smooth muscle cells and is employed in vascular interventional therapies.</p>

<p>Rebamipide is a gastroprotective agent that is used to treat various gastrointestinal disorders such as gastric ulcers and GERD. This drug’s mechanism of action is not fully understood however, it is thought to exert its effects by promoting the secretion of protective mucus in the stomach and intestine, which helps to create a barrier against stomach acid and other irritants. Additionally, it has antioxidant and anti-inflammatory properties that can help reduce tissue damage.</p>

<p>Inhibits isocitrate dehydrogenase 1 (IDH-1) harbouring a gain of function mutation at R132, which causes impaired cellular differentiation via epigenetic modulation. By inhibiting mutant IDH1, synthesis of oncometabolite 2-hydroxyglutarate is reduced. This compound therefore has therapeutic potential in solid and haematological malignancies, such as acute myeloid leukemia (AML).</p>

<p>Inhibitor of FLT3 and AXL tyrosine kinases</p>

<p>BRK tyrosine kinase (PTK6) inhibitor; anti-proliferative in breast cancer cells</p>

<p>Inhibitor of leucine-rich repeat kinase LRRK2Â</p>

<p>Lovastatin is an HMG-CoA reductase inhibitor that is used to lower LDL cholesterol levels and to aid in the management of cardiovascular diseases. Animal studies have demonstrated that this drug has vasculoprotective properties.</p>

<p>γ-secretase inhibitor; reduces amyloid-β in brainÂ</p>

<p>Antirheumatic; immunosuppressant; neuroprotective; neuroregenerative</p>

<p>A specific inhibitor of Bone Morphogenetic Protein (BMP) type 1 receptors ALK2 and ALK3 (IC50  &lt; 0.5 µM). Dorsomorphin analog that exclusively targets the BMP but not VEGF signaling. It is able to inhibit the BMP-induced Smad1/5/8 activation but not the p38/MAP kinase signaling or Activin A-induced Smad2 activation.</p>

<p>Carmofur is an antineoplastic agent that is used to treat various cancers such as breast and colorectal cancer. This drug is a derivative of fluorouracil. Carmofur is an inhibitor of the human acid ceramidase, a lysosomal amidase involved in the development of cancer cells.</p>

<p>Sorafenib is a drug that belongs to the class of multikinase inhibitors. It inhibits a number of kinases, including the Mcl-1 protein, which is involved in apoptosis along with blocking picolinic acid (PA), an endogenous metabolite involved in apoptosis signal transduction. Sorafenib also binds to epidermal growth factor receptor (EGFR) on the surface of cancer cells, inhibiting the production of proteins that are required for angiogenesis, thus blocking the formation of new blood vessels. Sorafenib may also inhibit P-glycoprotein (Pgp) activity. Overall, these cytotoxic effects give Sorafenib anti-tumor properties, inhibiting angiogenesis and cellular transformation, which are the two main processes of tumor growth and metastasis. Sorafenib tosylate has been shown to be effective against a range of solid tumors such as breast, prostate and lung cancers and is also used for the treatment of metastatic colorectal cancer and renal cell carcinoma. A combination therapy group found that sorafenib was more effective when used with interferon alfa-2b for the treatment of advanced renal cell carcinoma. Sorafenib also has the potential for drug interactions with other drugs that are metabolized by cytochrome P450 enzymes.</p>

<p>Inhibitor of pan-class I PI3K family of lipid kinases; antineoplastic</p>

<p>SIRT1 activator</p>

<p>Inhibits interaction between small GTPase Rab27a and its effector JFC1 (synaptotagmin-like protein1, Slp1). These proteins regulate neutrophil exocytosis, decrease neutrophil infiltration in liver and kidneys and reduce extracellular ROS production by NAPDH oxidase. Thus, nexinhibib20 suppresses systemic inflammation.</p>

<p>Selective inhibitor of the platelet derived growth factor receptor PDGFRβ with IC50 value of 4.2 nM. JNJ 10198409 inhibits the PDGFRβ kinase activity and its downstream signalling leading to anti-proliferative and anti-angiogenic effects, which were confirmed in various tumoral cell lines.</p>

<p>Inhibitor of stearoyl-CoA desaturase SCD1 with IC50 of 6.3 nM, as measured in the SCD1-expressing human microsomes.  A 939572 exhibited anticancer activity as it reduced cell proliferation and triggered cell killing in human non-small cell lung carcinoma cells. A 939572 inhibited tumour growth in an in vivo model for gastric carcinoma and reduced the oleic acid:stearic acid ratio in mouse liver and plasma.</p>

<p>Inhibits mTORC1 and mTORC2 serine/threonine kinases</p>

<p>5-Fluoro-1-(tetrahydro-2-furyl)uracil is a chemotherapeutic agent, which is a synthetic derivative of uracil. This compound is developed from modified nucleosides with the aim of enhancing antitumor efficacy. Its mechanism of action involves the inhibition of thymidylate synthase, leading to a disruption in DNA synthesis. By integrating into RNA and DNA, it ultimately impedes tumor cell proliferation due to RNA processing interference and DNA damage.</p>

<p>Wee1 inhibitor with an IC50 of 5.2 nM</p>

<p>Inhibitor of TGF-α, CTGF, ERK1/2, NF-κB and FasL; anti-inflammatory</p>

<p>Inhibits non-receptor tyrosine kinase BTK; antineoplastic</p>

<p>Dual inhibitor of the adaptor protein 2-associated kinase 1 (AAK1) and BMP2-inducible kinase (BMP2K) with IC50 values of 270 nM and 1 μM, respectively. In a recent study, SGC AAK1 1 stabilised β-catenin, inhibited phosphorylation of the AP2 complex subunit mu protein (AP2M1) and activated Wnt signalling in in vitro experiments._x000D_</p>

<p>Potent and selective inhibitor of histone deacetylase 6 (HDAC6) with IC50 of 2.4 nM. Its anti-inflammatory activity was examined in a mouse model for acute colitis. The compound protected from intestinal inflammation by prevention of infiltration of CD19+ B-cells into the lamina propria of colonic epithelium and attenuated neutrophil activation. Its broad anti-inflammatory response involved decrease in 24 inflammatory chemokines and cytokines. Also, it is a potent inhibitor of cell proliferation in pancreatic cancer cell lines.</p>

<p>Hydroxychloroquine is a drug that is used to treat multiple types of autoimmune diseases, including rheumatoid arthritis, systemic lupus erythematosus and discoid lupus. It is a prodrug, which is activated in the liver to hydroxychloroquine. It inhibits the production of inflammatory cytokines and nitric oxide by binding to the toll-like receptor 4 (TLR4) and inhibiting signaling pathways downstream of TLR4 activation. Additionally, Hydroxychloroquine is used to prevent and treat malaria caused by parasitic protozoan from the Plasmodium genus. Furthermore, recent studies revealed that hydroxychloroquine has beneficial effects on COVID-19 patients, as the current evidence shows that hydroxychloroquine inhibits SARS CoV-2 entry in host cells by interfering with endocytosis and affecting the glycoprofile on the spike glycoprotein.</p>

<p>Autophagy activator that acts through targeting the ATP6V1A subunit of vATPase</p>

<p>Short acting monoamine oxidase inhibitor</p>

<p>Cobicistat is an inhibitor of human cytochrome P450 3A enzymes (CYP) with no antiviral activity. Cobicistat is used in the treatment of HIV-1 infection, as an alternative to ritonavir, to increase the half-life of antiviral medications (von Hentig, 2016). Cobicistat acts as a booster by selectively inhibiting the hepatic degradation of the drugs, for example, in the pharmacological regime against HIV-1, which often includes protease inhibitors, such as, darunavir, atazanavir, and lopinavir, or the integrase inhibitor elvitegravir (Deeks, 2014).</p>

<p>Selective and potent inhibitor of 8-oxoguanine DNA glycosylase OGG1 with IC50 of 0.6 μM. OGG1 is a key enzyme in DNA repair mechanism called base excision repair (BER). The compound inhibits the hydrolysis of glycosidic bond required for the excision of 8-oxoguanine from double stranded DNA, which leads to accumulation of mutations. It has been proposed as monotherapy for certain types of cancers as well as adjuvant for cancer therapy with DNA damaging agents. It has potential to sensitize tumours for chemotherapy and inhibit development of drug resistance mechanisms.</p>

<p>Zileuton is an inhibitor of the 5-lipoxygenase enzyme, thus preventing the leukotrienes LTE4, LDT4, LTB4 and LTC4 from being formed. This in turn reduces inflammation, bronchoconstriction and mucus secretion in the airways. As a result, Zileuton can be used in the treatment and management of asthma and allergic rhinitis. Studies have shown that Zileuton has the potential to reverse dementia-related brain damage.</p>

<p>A cytidine analogue and inhibitor of DNA methyl transferases (DNMTs) with anti-cancer activity. This stable, hydrophilic compound forms covalent complexes between DNMT and zebularine-substrate DNA. It causes DNA lesions that block replication and cause replication fork collapse, leading to the formation of DNA double-strand breaks. It was also shown that zebularine-induced DNA methylation decrease in the IL-1β promoter region and disrupts molecular mechanisms of neuroinflammation. Moreover, this molecule down-regulates the DNA-methylation profile in the pluripotency genes’ promoters, which leads to improved development of somatic cell nuclear transfer (SCNT) embryos.</p>

<p>EGFR tyrosine kinase inhibitor; pro-apoptotic; antiproliferative in cancer cells</p>

<p>Apremilast is the commercial name of a phosphodiesterase-4 (PDE4) inhibitor developed to treat chronic inflammatory disorders. Similarly to thalidomide, the apremilast molecule carries a phthalimide ring, but it lacks however the glutarimide ring needed to bind to cereblon, specifically targeted by thalidomide. As a drug, apremilast is indicated for the treatment of psoriasis and psoriatic arthritis.</p>

<p>VEGFR tyrosine kinase inhibitor</p>

<p>Inhibitor of MEK1 and MEK2 kinases</p>

<p>Thymidylate synthase inhibitor</p>

<p>Reversible inhibitor of trypsin</p>

<p>Meloxicam is a non-steroidal anti-inflammatory drug (NSAID) which is used to treat various types of pain and inflammation caused by arthritis. It is also a COX-2 inhibitor which reduces gastrointestinal effects of this drug. Inhibiting these enzymes, allow for a decrease in inflammatory symptoms.</p>

<p>Immune suppressant; prevents pro-inflammatory cytokine release</p>

<p>Inhibitor of 5-lipoxygenase activating protein_x000D_</p>

<p>Inhibits YAP/Tead transcriptional activity. Has anti-tumour effects on oesophageal adenocarcinoma with therapeutic potential in combination with 5-FU. Involved in ferroptosis, mediated by iron-dependent ROS.</p>

<p>Inhibitor of Rho-kinases</p>

<p>A selective inhibitor of MEK5 protein kinase with an IC50 value of 4.3 nM. Blocks transcriptional activation of myocyte-specific enhancer factor 2C (MEF2C). Inhibits phosphorylation of ERK5 protein kinase and thereby reverses inhibition of TNF signaling induced by fluid shear stress in endothelial cells. Induces apoptosis in FLT3-ITD cells.</p>

<p>A 939572 is an inhibitor of stearoyl-CoA desaturase 1 (SCD1). It exhibits anticancer activity as it inhibits cell growth and promotes cell death in human non-small cell lung carcinoma cells.</p>

<p>Atorvastatin is an HMG-CoA reductase inhibitor which is used to lower lipid levels and to reduce the risk of cardiovascular disease. This drug belongs to the class of medicines called statins. It lowers abnormal levels of cholesterol and lipids to reduce the risk of cardiovascular disease by inhibiting the enzyme HMG-CoA.</p>

<p>Drotaverine is an antispasmodic drug that is used to alleviate gastrointestinal and genitourinary smooth muscle spasms. This drug works by inhibiting phosphodiesterase-4 and increasing levels of cAMP leading to smooth muscle relaxation.</p>

<p>Inhibitor of COX-2 and PDE4 enzymes; NSAID of coxib class</p>

<p>Antagonist of Wnt signalling pathway by inhibiting the activity of Porcn, a member of the membrane-bound O-acyltransferase (MBOAT) family. Porcn is required for the palmitoylation of Wnt, mediating its secretion and signalling. Inhibits self-renewal in embryonic stem cells, whilst promoting differentiation to epiblast stem cells.</p>

<p>Inhibitor of COX1 cyclooxygenase</p>

<p>Polmacoxib is a non-steroidal anti-inflammatory drug (NSAID), which is derived through synthetic chemical processes. It functions as a selective cyclooxygenase-2 (COX-2) inhibitor. By selectively inhibiting the COX-2 enzyme, polmacoxib reduces the conversion of arachidonic acid to prostaglandins that mediate inflammation and pain, while sparing the COX-1 enzyme that protects gastric mucosa and maintains platelet function.</p>

<p>Fibroblast growth factor receptor inhibitor</p>

<p>Thalidomide is a piperidinyl isoindole drug that is used to treat various cancers such as myeloma and erythema nodosum leprosum. This drug is immunosuppressive and has anti-angiogenic activity. Thalidomide’s mechanism of action is not fully understood however it is thought to block the activity of tumor necrosis factor-alpha (TNF-α).</p>

<p>A selective VHL inhibitor that stabilizes the hydroxylated form of HIF-α, resulting in upregulation of downstream target genes and proteins. Provides a tool for studying hypoxic signaling pathway.</p>

<p>A small molecule inhibitor with high selectivity for CDK8 over CDK19. Increases IL-10 production in stimulated human and murine macrophages and dendritic cells. Modulatory action on inflammatory responses has therapeutic potential.</p>

<p>Ibandronate is a bisphosphate used in the treatment of osteoporosis in postmenopausal women. This drug slows down the activity of osteoclasts resulting in a slower process of bone breakdown. This drug also inhibits farnesyl diphosphate and induces apoptosis of hematopoietic tumor cells.</p>

<p>Bestatin is a competitive protease inhibitor. It inhibits aminopeptidase N and is being studied for the use and treatment for acute myelocytic leukemia.</p>

<p>Benserazide is a drug that is used for the treatment of Parkinson’s disease and restless leg syndrome. This drug is a decarboxylase inhibitor and is usually used in combination with Levodopa.</p>

<p>Dutasteride is an androgenic compound and a 5α-reductase inhibitor that is used to treat benign prostatic hyperplasia (BPH) and male pattern baldness. Dutasteride reduces prostate volume and improves symptoms of BPH by inhibiting the enzyme 5α-reductase, which converts testosterone to dihydrotestosterone.</p>

<p>Diclofenac is a non-steroidal anti-inflammatory drug that is used to treat the signs and symptoms of arthritis and osteoarthritis. This drug inhibits COX-1 and COX-2 enzymes. As a result, it reduces pain and inflammation in joints. Diclofenac is usually used as a first line therapy for acute and chronic pain.</p>

<p>HMG-CoA reductase inhibitor</p>

<p>Vardenafil is a phosphodiesterase type 5 inhibitor that binds to intracellular targets and competitively inhibits cyclic guanosine monophosphate (cGMP) hydrolysis thus increasing cGMP levels. Vardenafil can be used for the research of erectile dysfunction, hepatitis and diabetes.</p>

<p>AKTide-2T is a 14-mer peptide which has the ability to bind to the substrate binding domain of Akt1 with a Ki of 12mM. AKt1 is part of the Akt kinase family which are serine/threonine kinase and it is ubiquitously expressed. AKt1 performs roles such as promoting endothelial neoplasms and through phosphorylating angiogenic substrates AKt1 plays a role in angiogenesis. AKT kinases as a whole perform functional roles in cell proliferation, cell growth, survival and intermediary metabolism.During peptide library screening, AKTide-2T was found to contain the optimal motif for successful binding to AKT. When phosphoamino acid analysis of AKTide-2T was carried out it was observed that although AKTide-2T contained two potential AKT phosphorylation sites: serine or threonine, AKT only phosphorylated the serine site. Furthermore it was found that AKTide-2T exhibits properties of being a competitive inhibitor for example it competitively inhibits histone H2B from being phosphorylated by AKT.</p>