intraocular

Netarsudil Dihydrochloride (AR-13324 Dihydrochloride) is an inhibitor of Rho-associated protein kinase (ROCK) and norepinephrine transporter (NET) with effective in intraocular pressure (IOP) reduction.

DL-Adrenaline Hydrochloride is the hydrochloride salt of the naturally occurring sympathomimetic amine with vasoconstricting, intraocular pressure-reducing activities.

Brimonidine Tartrate (AGN190342 tartrate) is a quinoxaline derivative and adrenergic α-2 receptor agonist (EC50: 0.45 nM) that is used to manage intraocular pressure associated with open-angle glaucoma or ocular hypertension.

(Rac)-MGV354 (MGV354) is the racemate of MGV354. MGV354 is a soluble activator of guanylate cyclase (sGC)(EC50s of <0.5 nM, and 5 nM in CHO and GTM-3 E cells, respectively).

PGF2α isopropyl ester is an ester prodrug of PGF2α with enhanced lipid solubility. Due to better membrane penetration, PGF2α isopropyl ester is more suitable than PGF2α or PGF2α tromethamine salt for topical application in studies on intraocular pressure. The ester functionality is readily hydrolyzed in vivo to release the active compound PGF2α. When administered topically to the eyes of cynomolgus monkeys, a 5 μg dose reduces intraocular pressure by 68% after the fourth day of treatment.

N-Desethyl Bimatoprost (17-phenyl trinor PGF2α amide) is an F-series PG analog in which the C-1 carboxyl group has been modified to an unsubstituted amide. PG esters have been shown to have ocular hypotensive activity. PG N-ethyl amides were recently introduced as alternative PG hypotensive prodrugs. Although it has been claimed that PG amides are not converted to the free acids in vivo, studies have shown that bovine and human corneal tissue converts the amides of various PGs to the free acids with a conversion efficiency of about 10-20% relative to the hydrolysis of isopropyl esters. 17-phenyl trinor PGF2α amide would be expected to show the typical intraocular effects of latanoprost, but with the much slower hydrolysis pharmacokinetics of the PG N-amides.

Bimatoprost is an F-series prostaglandin (PG) analog which has been approved for use as an ocular hypotensive drug. Oxidation of the C-15 hydroxyl group and amide hydrolysis of Bimatoprost produces 15-keto-17-phenyl trinor PGF2α. 15-keto-17-phenyl trinor PGF2α is a potential metabolite of bimatoprost when administered to animals. 15-keto PG analogs are potential minor impurities in commercial preparations of their corresponding bulk drug compounds. Although much less potent that the parent compound, 15-keto PGs still retain the ability to produce a small but measurable decrease (1 mm Hg) in the intraocular pressure of normal cynomolgus monkeys when administered at a dose of 1 μg/eye. 15-keto Latanoprost (15-keto-17-phenyl-13,14-dihydro trinor PGF2α isopropyl ester) is a miotic in the normal cat eye, causing an 8 mm reduction in pupillary diameter at 5 μg/eye. Again, this is not as potent as many other F-type PGs; for example, PGF2α will produce this degree of miosis at a dose of less than 1 μg/eye.

Latanoprost is an F-series prostaglandin analog which has been approved for use as an ocular hypotensive drug. 5-trans Latanoprost is an isomer of latanoprost wherein the double bond between carbons 5 and 6 has been changed from cis (Z) to trans (E). The trans isomer of latanoprost occurs as an impurity of between 2-5% in most commercial preparations of the bulk drug product. The present compound was prepared primarily as an analytical standard for detection and quantitation of this impurity. From what can be inferred from the study of other trans isomers of F-type prostaglandins, 5-trans latanoprost's biological activity is likely to be similar to that of the cis isomer. However, there are no specific published reports on the biological activity, and on the intraocular hypotensive activity in particular, of 5-trans latanoprost.

Prostaglandin F2α (PGF2α) activates the FP receptor, promoting smooth muscle contraction and luteolysis. 17-phenyl trinor PGF2α binds the FP receptor on ovine luteal cells with a relative potency of 756% compared to that of PGF2α. It is produced in vivo by the hydrolysis of 17-phenyl trinor PGF2α ethyl amide. 17-phenyl trinor PGF2α ethyl amide is used to reduce intraocular pressure related to glaucoma. 17-phenyl trinor PGF2α cyclopropyl methyl amide is a lipophilic analog of 17-phenyl trinor PGF2α. Amides of PGs may serve as prodrugs, as they are hydrolyzed in certain tissues to generate the bioactive free acid.

Latanoprost is an F-series prostaglandin (PG) analog which has been approved for use as an ocular hypotensive drug. Latanoprost is an isopropyl ester, a prodrug form which is converted to latanoprost (free acid) by endogenous esterase enzymes. The free acid form is 200 times more potent than latanoprost as a ligand for the human recombinant FP receptor. 5-trans Latanoprost (free acid) is an isomer of latanoprost (free acid) wherein the double bond between carbons 5 and 6 has been changed from cis (Z) to trans (E). The trans isomer of latanoprost occurs as an impurity in commercial preparations of the bulk drug product. The present compound was prepared primarily as an analytical standard for detection and quantitation of this impurity. From what can be inferred from the study of other trans isomers of F-type prostaglandins, the biological activity of this isomer is likely to be similar to that of the cis isomer. However, there are no specific published reports on the biological activity, and on reducing intraocular pressure in particular, of 5-trans latanoprost.

Dichlorphenamide-13C6is intended for use as an internal standard for the quantification of dichlorphenamide by GC- or LC-MS. Dichlorphenamide is a sulfonamide and an orally bioavailable carbonic anhydrase (CA) inhibitor (Kis = 1.20, 38, 50, and 50 nM for the human CA isoforms CAI, CAII, CAIX, and CAXII, respectively).1It lowers intraocular pressure in rabbits when 50 μl of a 10% solution is applied topically to the eye.2Dichlorphenamide rescues the potassium deficiency and prevents insulin-induced paralysis in a rat model of familial hypokalemic periodic paralysis when administered at a dose of 5.6 mg/kg per day for ten days.3Formulations containing dichlorphenamide have been used in the treatment of glaucoma and primary periodic paralysis.

AL 34662 is a selective and potent 5-HT2A receptor agonist with IC50s of 0.77 nM and 1.5 nM for rat and human 5-HT2 receptors, respectively.AL 34662 is also a low affinity α-1D adrenergic agonist, with an EC50 of 0.4 μM.AL 34662 can be used to lower intraocular pressure.

Prostaglandin F2α ethanolamide (PGF2α-EA) is produced by COX-2 metabolism of the endogenous cannabinoid, arachidonoyl ethanolamide (AEA), found in brain, liver, and other mammalian tissues. AEA can be metabolized directly by the sequential action of COX-2 and specific PG synthases to produce ethanolamide congeners of the classical PGs. PGF2α-EA has also been reported to be biosynthesized by this mechanism when AEA was infused into the lung and liver of living mice. PGF2α-EA is a potent dilator (EC50 = 58 nM) of the cat iris sphincter, which is a model system for testing potential intraocular hypotensive agents.

Tafluprost ethyl amide is a prostaglandin derivative. Tafluprost ethyl amide reduces intraocular pressure (IOP) and affects eyelash growth. Tafluprost ethyl amide can be used in anti-glaucoma eye drops and cosmetics.

Latanoprost lactone diol is an important intermediate compound in the synthesis of Latanoprost. Latanoprost, classified as a prostaglandin F2α analogue, functions as an agonist for the FP prostanoid receptor, resulting in a reduction in intraocular pressure (IOP).

IMS2186 is a reagent with activity of antichoroidal neovascularization (CNV). IMS2186 could arrest cancer cell cycle in G2/M phase, result in exerting anti-proliferation and anti-angiogenesis effects. IMS2186 reduces the amount of eye leakage and diseased cells with no intraocular toxicity.

The actions of many clinical F-series prostaglandins (PGs), including those used for estrous synchronization and for reduction of intraocular pressure (IOP), are mediated through the PGF2α (FP) receptor. 16-phenoxy tetranor Prostaglandin F2α cyclopropyl methyl amide (16-phenoxy tetranor PGF2α cyclopropyl methyl amide) is an analog of PGF2α containing a 16-phenoxy group on the lower (ω) side chain and a cyclopropyl methyl amide at the C-1 position. There are no published reports on the biological activity of 16-phenoxy tetranor PGF2α cyclopropyl methyl amide.

Omidenepag isopropyl is converted to the active product Omidenepag during corneal penetration. Omidenepag isopropyl is a selective EP2 receptor agonist. Omidenepag isopropyl displays only a weak affinity for EP1, EP2, and FP receptors. Omidenepag isopropy

15-keto Prostaglandin F2α is a metabolite of Prostaglandin F2α that lowers intraocular pressure in rabbits.

Sovesudil (PHP-201) is a potent, ATP-competitive, locally acting Rho kinase (ROCK) inhibitor. Sovesudil shows IC50 s of 3.7 and 2.3 nM for ROCK-I and ROCK-II, respectively. Sovesudil can lower intraocular pressure (IOP) without inducing hyperemia.

GAT229 is a positive allosteric modulator of cannabinoid receptor 1 (CB1) and the S-(-) enantiomer of the CB1 modulator GAT211. It does not activate the receptor on its own but enhances the binding and activity of CB agonists. GAT229 (1 μM) enhances the binding of the CB1 full agonist CP 55,940 to CHO cells expressing human recombinant CB1 (hCB1), as well as the activity of 2-arachidonoyl glycerol , arachidonoyl ethanolamide , and CP 55,940 in arrestin2 recruitment assays and increases ERK1/2 and PLCβ3 phosphorylation in HEK293 cells expressing hCB1. GAT229 (1 μM) enhances depolarization-induced suppression of excitation but does not inhibit excitatory postsynaptic currents (EPSCs) in murine autaptic hippocampal neurons. GAT229 (0.2%, topical) reduces intraocular pressure by 5.8 and 7.7 mm Hg after 6 and 12 hours, respectively, in a transgenic mouse model of ocular hypertension using nose, ear, eye mutation (nee) mice.

Aceclidine (1-azabicyclo[2.2.2]octan-3-yl acetate) is a modulator of M3 mAChR and can be used in studies about treating glaucoma by reducing intraocular pressure.

AR-13503, is an metabolite of Netarsudil (AR-11324), is a Rho-associated protein kinase inhibitor. Netarsudil is potential useful for treating glaucoma and/or reducing intraocular pressure.

H-0104 Dihydrochloride is an inhibitor of ROCK that acts by applying potent intraocular pressure (IOP)-lowering effects into the eyes of monkeys.

O-desmethyl Brinzolamide is an active metabolite of the carbonic anhydrase (CA) inhibitor brinzolamide .1,2It inhibits CAII and CAIV (IC50s = 0.136 and 165 nM, respectively).1 1.Huang, Q., Rui, E.Y., Cobbs, M., et al.Design, synthesis, and evaluation of NO-donor containing carbonic anhydrase inhibitors to lower intraocular pressureJ. Med. Chem.58(6)2821-2833(2015) 2.Lo Faro, A.F., Tini, A., Gottardi, M., et al.Development and validation of a fast ultra-high-performance liquid chromatography tandem mass spectrometry method for determining carbonic anhydrase inhibitors and their metabolites in urine and hairDrug Test Anal.13(8)1552-1560(2021)

Methazolamide-d6 is intended for use as an internal standard for the quantification of methazolamide by GC- or LC-MS. Methazolamide is a carbonic anhydrase inhibitor. It reduces intraocular pressure and cerebrospinal fluid flow in a rat model of glaucoma. Methazolamide reduces electroshock-induced seizures in rats with an ED50 value of 19.2 mg/kg. It also inhibits production of reactive oxygen species (ROS) in a primary cortical neuron (PCN) cellular model of subarachnoid hemorrhage (SAH) and reduces cerebral edema in a mouse model of SAH.3 Methazolamide is larvicidal, with a 50% larvicidal concentration (LC50) value of 724 ppm, but has no activity when administered in the diet to adult A. aegypti. Formulations containing methazolamide have been used in the treatment of glaucoma.

Levobetaxolol, also known as AL-1577A and Betaxon, is a cardioselective β-adrenergic receptor inhibitor. It has been demonstrated to reduce intraocular pressure in patients affected by ocular hypertension and primary open-angle glaucoma.

Compound 7c, identified as carbonic anhydrase inhibitor 1, effectively inhibits carbonic anhydrase II. This inhibitor, also known as carbonic anhydrase inhibitor 3, lowers intraocular pressure in glaucomatous rabbits [1].

Prostaglandin F2αethyl amide (PGF2α-NEt), a PGF2α analog featuring an N-ethyl amide modification at the C-1 carboxyl group, possesses ocular hypotensive activity similar to PG esters. Introduced as alternative prostaglandin ocular hypotensive prodrugs, PGF2α-NEt and other PG N-ethyl amides, contrary to claims of not converting to free acids in vivo, have been demonstrated by our laboratory studies to undergo conversion by bovine and human corneal tissue into the respective free acids at a rate of approximately 2.5 µg/g corneal tissue/hr. This suggests PGF2α-NEt is expected to elicit typical PGF2α free acid intraocular effects, albeit with slower hydrolysis kinetics characteristic of PG N-amides.

AR-13324 analog mesylate is an inhibitor of Rho-kinase and a norepinephrine transporter and reduces intraocular pressure in normotensive monkey eyes.

Apraclonidine hydrochloride (ALO 2145) is an α2-adrenergic agonist and a weak α-1 adrenergic receptor agonist. Apraclonidine hydrochloride lowers intraocular pressure in human eyes and can be used in studies about glaucoma therapy.

GAT564 (Compound 15d) is a highly effective allosteric modulator of cannabinoid 1 receptor (CB1R), having EC50 values of 87 nM and 320 nM for cAMP and β-arrestin2, respectively. It significantly enhances the binding of orthosteric ligands to hCB1R. Moreover, GAT564 exhibits remarkable efficacy as a topical agent, resulting in a significant reduction of intraocular pressure (IOP) in an ocular normotensive murine model of glaucoma [1].

Bimatoprost grenod(15-(6-nitroxyhexanoyl)-17-phenyl trinor PGF2α) is a nitric oxide-donating derivative of 17-phenyl trinor PGF2α.1It increases cGMP levels in rabbit aqueous humor and iris ciliary body when topically administered at a concentration of 0.042%. Topical administration of 15-(6-nitroxylhexanoyl)-17-phenyl trinor PGF2α(0.14%) reduces intraocular hypertension (IOP) in a rabbit model of hypertonic saline-induced transient ocular pressure. It also reduces IOP in a cynomolgus monkey model of laser-induced ocular hypertension when administered topically at a concentration of 0.042%.

Latanoprost is an F-series prostaglandin (PG) analog which has been approved for use as an ocular hypotensive drug. Oxidation of the C-15 hydroxyl group without isopropyl ester hydrolysis produces 15-keto latanoprost. 15-keto Latanoprost is a potential metabolite of latanoprost when administered to animals. 15-keto Latanoprost is also one of the common minor impurities found in commercial preparations of the bulk drug compound. Although much less potent that the parent compound latanoprost, 15-keto latanoprost still retains the ability to produce a small but measurable decrease (1 mm Hg) in the intraocular pressure of normal cynomolgus monkeys when administered at a dose of 1 μg/eye. 15-keto Latanoprost is also a miotic in the normal cat eye, causing an 8 mm reduction in pupillary diameter at 5 μg/eye. Again, this is not as potent as many other F-type PGs; for example, PGF2α will produce this degree of miosis at a dose of less than 1 μg/eye. Products of β-oxidation account for most of the metabolites of latanoprost recovered in plasma and urine. However, 15-keto latanoprost is a minor metabolite, and one which could be enhanced in situations where β-oxidation is reduced.

Netarsudil, also known as AR-11324, is a Rho-associated protein kinase inhibitor. Netarsudil is potential useful for treating glaucoma and/or reducing intraocular pressure. Netarsudil Increases Outflow Facility in Human Eyes Through Multiple Mechanisms. Netarsudil inhibited kinases ROCK1 and ROCK2 with a Ki of 1 nM each, disrupted actin stress fibers and focal adhesions in TM cells with IC50s of 79 and 16 nM, respectively, and blocked the profibrotic effects of TGF-β2 in HTM cells. Netarsudil produced large reductions in IOP in rabbits and monkeys that were sustained for at least 24 h after once daily dosing, with transient, mild hyperemia observed as the only adverse effect.

Verosudil (AR-12286) is a highly potent Rho kinase (ROCK) inhibitor with a Ki of 2 and 2 nM against ROCK1 and ROCK2, respectively. AR-12286 reverses steroid-induced intraocular pressure in mice by decreasing intraocular pressure by increasing outflow of aqueous ether through the trabecular reticulum.

Bromfenac sodium hydrate (Bromfenac monosodium salt sesquihydrate) is the sodium salt form of bromfenac, a nonsteroidal anti-inflammatory drug (NSAID) with analgesic and anti-inflammatory activities. Upon ophthalmic administration, bromfenac binds to and inhibits the activity of cyclooxygenase II (COX II), an enzyme which converts arachidonic acid to cyclic endoperoxides, precursors of prostaglandins (PG). By inhibiting PG formation, bromfenac is able to inhibit PG-induced inflammation, thereby preventing vasodilation, leukocytosis, disruption of the blood-aqueous humor barrier, an increase in vascular permeability and an increase in intraocular pressure (IOP).

Nipradolol (KT-210; K-351), an alpha-1-adrenergic receptor antagonist, effectively inhibits the elevation of intraocular pressure (IOP) induced by Phenylephrine in an albino rabbit model and suppresses noradrenaline (NA)-induced muscle contractions. Additionally, it demonstrates vasodilatory effects on the coronary artery in dogs [1] [2].

Bamosiran, a small interfering RNA (siRNA), specifically targets the β-adrenergic receptor 2 to reduce intraocular pressure.

Methazolamide (CL 8490) is a carbonic anhydrase inhibitor that is used as a diuretic and in the treatment of glaucoma.

Prostaglandin F2α methyl ester is a highly lipid-soluble PGF2α analog used to maintain low intraocular pressure.

Prostaglandin E3 (PGE3) is formed via the cyclooxygenase (COX) metabolism of eicosapentaenoic acid. [1] In human ocular tissue, it comprises 2.4% of the COX products formed. [1] When applied to the eyes of a rabbit, a 1 µg dose of PGE3 decreases intraocular pressure from 21 mmHg to about 17 mmHg.[2]

17-Phenyl trinor Prostaglandin F2αdiethyl amide (17-phenyl trinor PGF2αdiethyl amide) is a Prostaglandin F2α(PGF2α) analog characterized by the substitution of the C-1 carboxyl group with an N-diethyl amide. Prostaglandin (PG) esters and N-ethyl amides have demonstrated ocular hypotensive properties, with N-ethyl amides introduced as alternative options for PG hypotensive prodrugs. Studies indicate that both bovine and human corneal tissues can convert N-ethyl amides of various PGs into their free acid forms at a rate of approximately 2.5 µg/g corneal tissue/hr. However, dialkyl amides like 17-phenyl trinor PGF2αdiethyl amide resist conversion by corneal amidase, showing no detectable transformation into free acids. This characteristic suggests their potential as valuable investigative tools for assessing the intrinsic intraocular hypotensive activities of PG amides.

LX7101 is a potent inhibitor of both LIM kinase (LIMK) 1 and 2, and Rho-associated kinase 1 (ROCK1) and ROCK2, with IC50 values of 32, 4.3, 69, and 32 nM, respectively. It is selective, demonstrated by its lack of cross-reactivity in a panel of binding assays involving 78 receptors, transporters, and an additional 430 kinases, at a concentration of 10 μM. The topical administration of LX7101 (3 μl of a 1 mg/ml solution) to the eye has been shown to reduce intraocular pressure in a dexamethasone-induced mouse model of glaucoma.

15-keto Latanoprost is a potential metabolite of latanoprost when administered to animals. 15-keto Latanoprost is also one of the common minor impurities found in commercial preparations of the bulk drug compound. Although much less potent that the parent compound latanoprost, 15-keto latanoprost still retains the ability to produce a small but measurable decrease (1 mm Hg) in the intraocular pressure of normal cynomolgus monkeys when administered at a dose of 1 μg/eye. 15-keto Latanoprost is also a miotic in the normal cat eye, causing an 8 mm Hg reduction in pupillary diameter at 5 μg/eye. Again, this is not as potent as many other F-type prostaglandins; for example, prostaglandin F2α will produce this degree of miosis at a dose of less than 1 μg/eye.

Taprenepag (CP-544326) (CP-544326) is a potent and selective prostaglandin E2 receptor agonist (EC50 = 2.8 nM). Taprenepag has been used in trials studying the treatment of Ocular Hypertension and Glaucoma, Open-Angle.

2MD, an orally active vitamin D analog, both stimulates periosteal bone formation and decreases trabecular bone resorption, effectively restoring trabecular and cortical bone mass and strength. Additionally, 2MD regulates genes related to intraocular pressure (IOP) and reduces IOP in non-human primates [1] [2].

H-0106 Dihydrochloride is an inhibitor of ROCK that acts by applying strong intraocular pressure (IOP)-lowering effects into the eyes of monkeys.

Biosynthesis of 12(R)-HETE in invertebrates is via lipoxygenation of arachidonic acid . In mammals, 12(R)-HETE can be produced by 12(R)-LOs and also by CYP450 oxidation. The activity of 12(R)-HETE in mammals is predominantly proinflammatory. 12(R)-HETE exhibits dose-dependent leukocyte chemotaxis at concentrations as low as 100 nM, and lowers intraocular pressure in rabbits.

Nabitan hydrochloride is a synthetic cannabinoid analog with antiemetic and analgesic effects. It may bind to and activate the CB1 and CB2 cannabinoid receptors. It also reduces intraocular pressure and may be useful in treating glaucoma.

Adrenaline sulfate, an orally active hormone secreted by the adrenal glands' medulla, acts as an α-adrenergic and β-adrenergic receptor agonist. It is utilized in treating anaphylaxis and holds potential for cardiac arrest research.