Organometallic Ligands

<p>(2R)-Arimoclomol maleate is an investigational pharmaceutical compound, which is an orally bioavailable small molecule with pharmacological activity primarily targeting cellular protein homeostasis mechanisms. This therapeutic agent is derived from molecular chaperones and operates by selectively enhancing the expression of heat shock proteins (HSPs). The mechanism of action involves the modulation of the heat shock response, wherein (2R)-Arimoclomol maleate amplifies the natural cellular defense pathways against protein misfolding and aggregation.</p>

<p>Inhibitor of VEGFR, PDGR, c-Kit and Ret; inhibitor of angiogenesis</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>Diphenidol is an antiemetic agent used for the treatment and prevention of nausea and vomiting associated with various conditions. Its mechanism of action is not well known but it is thought to diminish vestibular stimulation and depress labyrinthine function.</p>

<p>Inhibitor of EIF2AK3/PERK kinases</p>

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

<p>AZD-7648 is a selective inhibitor of DNA-dependent protein kinase (DNA-PK), which is a pivotal enzyme involved in the non-homologous end joining (NHEJ) pathway of DNA repair. This product is derived from extensive chemical synthesis and optimization, designed for its specificity and efficacy in inhibiting DNA-PK activity. The mode of action involves binding to the ATP-binding site of DNA-PK, thereby obstructing its ability to facilitate the repair of double-strand DNA breaks.</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>Agomelatine is a potent agonist at melatonin receptors and an antagonist at serotonin receptors. It was designed to treat mood disorders, such as depression. It has been shown to improve mood by increasing the levels of certain neurotransmitters in the brain such as dopamine and noradrenaline. Agomelatine has beneficial phase-shifting effects in humans; it causes a sleep phase advance, a drop in body temperature, and an initial release of melatonin. According to controlled human studies, Agomelatine is equally effective at treating severe depression as the SSRI antidepressants paroxetine and sertraline.</p>

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

<p>Inhibits p38 MAP kinase; anti-inflammatory; neuroprotective</p>

<p>Saha Chloroalkane T1 is a specialized chemical compound, typically categorized as a chloroalkane. It emerges from a synthetic process involving the chlorination of hydrocarbons, specifically alkanes, which serves as its primary source. The mode of action for chloroalkanes like Saha Chloroalkane T1 involves the stable incorporation of chlorine atoms, enhancing reactivity and providing versatility in chemical reactions.</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>Vasopressin analog; vasoactive agent</p>

<p>17:0-20:4Pi (4) P is a synthetic phosphoinositide, which is a type of phospholipid. It is typically sourced from laboratory synthesis, often incorporating stable isotopes or specific fatty acid chains to mimic natural compounds found in cell membranes. This product functions primarily as a probe in biochemical experiments, particularly for studying lipid signaling pathways within cells.</p>

<p>Fexofenadine is a selective histamine-1 receptor antagonist that is used to treat the symptoms of seasonal allergies. It does not cross the blood-brain barrier and carries little-to-no activity at off targets. This drug binds to the inactive form of the H1 receptor and inhibits its activation and downstream effects.</p>

<p>D-Fructose-1,6-diphosphate trisodium salt octahydrate is a biochemical compound, an important intermediate in carbohydrate metabolism. It is sourced from the glycolytic pathway, where it functions as a phosphorylated sugar derivative formed from fructose-6-phosphate through the action of phosphofructokinase. As an allosteric regulator, it plays a crucial role in glycolysis, acting to accelerate enzyme reactions that convert glucose to pyruvate, thus providing energy to cells.</p>

<p>Used to treat psoriasis; teratogenic</p>

<p>Antagonist of cardiac potassium channel HERG; anti-psychotic</p>

<p>Ondansetron is a serotonin 5-HT3 receptor antagonist that has been shown to inhibit the effects of serotonin in the gastrointestinal tract, thereby preventing nausea and vomiting that is caused by cancer chemotherapy. Chemotherapy and radiotherapy are associated with the release of serotonin (5-HT) from enterochromaffin cells of the small intestine, initiating a vomiting reflex through stimulation of 5-HT3 receptors located on vagal afferents. Ondansetron blocks the initiation of this reflex. The drug binds to receptors on cells in the gastrointestinal tract that are normally activated by serotonin, thereby blocking its effect.</p>

<p>Montelukast is a leukotriene receptor antagonist that blocks the binding of leukotrienes to their receptors. It is used for the treatment of chronic cough, as well as for the relief of symptoms of seasonal and perennial allergic rhinitis. Montelukast binds to leukotriene receptors on cells in the airways, preventing them from attaching to leukotrienes and triggering an inflammatory response. This drug has been shown to be effective in controlling asthma symptoms by reducing bronchial hyperresponsiveness and relieving respiratory obstruction due to inflammation. Montelukast also has anti-inflammatory properties, which are thought to be due to its ability to inhibit production of pro-inflammatory cytokines such as IL-6.</p>

<p>Agonist of β3-adrenoreceptors with thermogenic properties and potential to control diet-induced obesity. The compound reversed obesity in adult rats and was effective even in animals that continued to feed on high-fat food. It caused the enlarged white adipocytes to shrink and triggered remodelling of the white adipose tissue.</p>

<p>Inhibitor of ABC transporters; oral bioenhancer for anti-cancer therapy</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>Gefitinib is an inhibitor of the epidermal growth factor receptor (EGFR) protein. This inhibition is on the EGFR tyrosine kinase domain, where Gefitinib bindings to the ATP-binding site. As a a tyrosine kinase inhibitor, Gefitinib blocks tumor growth and has led to its use in slowing the progression of non-small cell lung cancer. Gefitinib also inhibits invasion and metastasis through inhibition of macrophage receptor interacting protein kinase 2 (RIPK2), rather than EGFR.</p>

<p>BDP 37 is a type of boron-dipyrromethene (BODIPY) dye, which is a class of fluorescent compounds known for their stability and brightness. These dyes are synthetic, designed for optimal photophysical properties, and are synthesized through the condensation of pyrrole derivatives with boron difluoride. BDP 37 operates by absorbing light and emitting fluorescence, a process facilitated by its delocalized electron system, which results in a high quantum yield and exceptional photostability. This makes it particularly well-suited for applications requiring long exposure to light.</p>

<p>Inhibits multiple receptor tyrosine kinases (RTKs), including c-Kit, PDGFRβ, PDGFRα, c-Met, and Axl. Sitravatinib inhibits proliferation of sarcoma cells and reduced tumor growth in vivo. Promotes immune response in tumor microenvironment and enhances sensitivity to immune checkpoint inhibitors. This compound is undergoing several clinical trials as a potential anti-cancer therapeutic agent.</p>

<p>O6-Benzylguanine is a guanine analog that is an antineoplastic agent. It works by acting as a suicide inhibitor of the enzyme O6-alkylguanine-DNA alkyltransferase. This results to an interruption of DNA repair so that damage can occur to local tumor targets.</p>

<p>Potent and selective positive allosteric modulator (PAM) of metabotropic glutamate receptor mGlu4. Valiglurax is orally bioavailable and CNS-penetrant mGlu4 PAM in preclinical development for the Parkinson’s disease therapy and alleviation of the motor symptoms.</p>

<p>Ifosfamide is an alkylating agent and immunosuppressive drug used in chemotherapy for the treatment of various cancers such as ovarian, testicular, cervical and bladder. This drug interferes with the normal process of DNA replication causing damage to the DNA in cancer cells hence preventing them from growing and dividing.</p>

<p>Tazarotene is an acetylenic retinoid that is used for the treatment of wrinkles, pigmentation of the skin and acne. Although, the mechanism of action for this drug is not yet fully understood, it is thought to bind to all three members of the retinoic acid receptor family. Studies have shown that this drug is associated with increased collagen production.</p>

<p>Potent and selective MAP/ERK kinase 1/2 inhibitor. Reduces growth of tumor cells with B-Raf and Ras mutations. Tumor regression observed after chronic treatment in in vivo xenograft models. Enhances anti-tumor effect in combination with irinotecan or docetaxel.</p>

<p>Competitive antagonist of ionotropic glutamate receptors of AMPA and kainate subfamilies. Reported anti-convulsant activity in seizures models induced by electrostimulation, drugs or genetic predisposition. Pro-convulsant effects in Theiler's murine encephalomyelitis virus-induced (TMEV) seizure model.</p>

<p>Cetirizine is a selective histamine-1 antagonist drug used for the treatment of allergies. One of the common uses is for a condition called allergic rhinitis. As Cetirizine is an antihistamine, its main mode of action is by selectively inhibiting H1 receptors. In vivo and ex vivo animal models have shown insignificant anticholinergic and antiserotonergic effects.</p>

<p>AZD3965 is a potent, selective and orally available monocarboxylate transporter 1 (MCT1) inhibitor with binding affinity of 1.6 nM, 6-fold selective for MTC1 over MCT2.</p>

<p>Inhibitor of CDK4/6 serine/threonine kinases; antineoplastic</p>

<p>CMX 001 is an antiviral medication that is a prodrug of cidofovir, which is derived from nucleoside analogs with direct inhibition of viral DNA polymerase. This mechanism of action allows CMX 001 to effectively disrupt viral replication by integrating into viral DNA and halting its synthesis. Designed to target a broad range of DNA viruses, this drug offers a robust means of controlling viral infections.</p>

<p>Crizotinib is a drug that belongs to the group of tyrosine kinase inhibitors. It is used in the treatment of cancers, including non-small cell lung cancer, small cell lung cancer, and other types of solid tumours. Crizotinib inhibits the activity of the tyrosine kinase ALK or anaplastic lymphoma kinase, which is involved in many signalling pathways and biological processes. The inhibition of this enzyme leads to decreased energy metabolism, reduced mitochondrial membrane potential and increased susceptibility to apoptosis.</p>

<p>Bicuculline is a phthalide-isoquinoline compound and is a competitive GABA receptor antagonist. It blocks GABA’s inhibitory action, mimicking epilepsy. This compound is used in research to better study epilepsy.</p>

<p>Inhibits urate anion exchanger 1 (URAT1); therapeutic use in gout</p>

<p>Eplerenone is a drug known as an aldosterone antagonist. It is a type of potassium-sparing diuretic that is used to treat chronic heart failure and high blood pressure, particularly for patients with resistant hypertension due to elevated aldosterone. It does this by blocking the activity of the enzyme that produces aldosterone, which increases levels of sodium and water in the body. This leads to a decrease in blood pressure.</p>

<p>Etodolac is a non-steroidal anti-inflammatory drug (NSAID) used to treat osteoarthritis and rheumatoid arthritis. It is also used to treat acute pain. This drug works by inhibiting prostaglandin synthesis from the inhibition of the enzyme cyclooxygenase.</p>

<p>Agonist of ghrelin receptor; growth hormone secretagog</p>

<p>Inhibitor of protein kinase CK2</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>NAP is a neuroprotective peptide, which is derived from activity-dependent neuroprotective protein (ADNP), with a mechanism involving microtubule stabilization and neuronal protection. It exhibits the ability to protect neurons from various types of damage, including oxidative stress and conditions mimicking neurodegenerative diseases. NAP enhances axonal transport and increases the resilience of neurons to insults that would typically result in cell death. This peptide has shown promise in preclinical studies for its potential to halt or reverse cognitive decline, making it a focal point for research into therapeutic strategies for disorders like Alzheimer's disease and other tauopathies. The peptide operates by binding to microtubules, promoting stability, and facilitating efficient transport of cellular components. Studies have highlighted its role in traversing the blood-brain barrier, which makes it a viable candidate for central nervous system-targeted therapies. Researchers continue to explore its efficacy and possible applications in improving cognitive function and providing neuroprotection in aging populations.</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>Pan-class I phosphatidylinositide 3-kinase (PI3K) inhibitor (IC50 = 3, 33, 3 and 75 nM at catalytic subunits p110α, p110β, p110δ and p110γ respectively). Inhibits proliferation in several cancer cell lines, such as glioblastoma, breast and prostate cancer cells. Has synergistic anti-cancer effect in combination with MEK/ERK kinase inhibitor GDC-0973 (cobimetinib).</p>

<p>Tretoquinol is a bronchodilator, which is synthesized from specific chemical reactions involving quinoline derivatives. It functions primarily as a beta-adrenergic agonist, stimulating beta-2 adrenergic receptors. This activation leads to the relaxation of bronchial smooth muscle, resulting in widened air passages and improved airflow. Tretoquinol's mechanism of action involves enhancing cyclic adenosine monophosphate (cAMP) levels, which then promotes the relaxation of the bronchial and vascular musculature.</p>

<p>Potent and irreversible inhibitor of phosphoinositide-3-kinase (PtdIns-3-kinase) with IC50 of 0.1 nM. PX 866 inhibited cell motility and growth of 3D spheroids of glioblastoma, breast, prostate and colon cancer cell lines at low nanomolar concentrations. PX 866 also exhibited anti-tumoral activity in vivo in xenograft models for ovarian and lung cancer.</p>