hCAIX/XII-IN-8 (compound 3g) is a potent human (carbonic anhydrase) CA IX and XII inhibitor, with Ki values of 8.5 and 6.7 nM, respectively. hCAIX/XII-IN-8 shows particularly strong inhibitory activity against the tumor-associated membrane-bound isoforms, hCA IX and XII, while maintaining a high selectivity ratio over cytosolic off-target isoforms hCA I and II[1].
Polmacoxib (CG100649) is a first-in-class, orally active nonsteroidal anti-inflammatory drug (NSAID) which is a dual inhibitor of COX-2 (IC50 around 0.1 μg/ml) and carbonic anhydrase[1]. Polmacoxib inhibits colorectal adenoma and tumor growth in mouse models[2].
Carbonic anhydrase inhibitor 14 (Compound 8b) is a carbonic anhydrase (CA) inhibitor with Ki values of 1203, 99.7, 9.4 and 27.7 nM against hCA I, hCA II, hCA IX and hCA XII, respectively. Carbonic anhydrase inhibitor 14 can also inhibit CDK2 with an IC50 of 20.3 μM. Carbonic anhydrase inhibitor 14 shows antitumor activity[1].
Halazone is an atypical antimicrobial sulfonamide derivative and a carbonic anhydrase II inhibitor with a Kd value of 1.45 µM. Halazone protects sodium channels from inactivation. Halazone is widely used for disinfection of drinking water[1][2].
Dichlorphenamide(Diclofenamide) is a carbonic anhydrase inhibitor that is used in the treatment of glaucoma. Target: Carbonic AnhydraseDichlorphenamide is a sulfonamide and a carbonic anhydrase inhibitor of the meta-Disulfamoylbenzene class. This drug has the same side-effects as acetazolamide, for which it is a useful substitute, except for a lesser tendency to cause dermatitis, renal calculi and metabolic acidosis. It may induce a more pronounced renal loss of potassium [1]. An average daily dose of 33 mg of diclofenamide, a carbonic-anhydrase inhibitor, was added to the anti-epileptic medication already employed in 105 cases of severe epilepsy which had shown insufficient clinical improvement. A favourable action on seizures, often accompanied by an improvement in the EEG tracing, was observed in 83 cases. The effect was of long duration in 47 cases in that it lasted for more than a year. It persisted for one to twelve months in a further 17 cases, while in 19 patients, who had reacted favourably to the treatment, medication had to be suspended because of intolerance [2].
hCAII-IN-1 (compound 7f) is a potent and selective inhibitor of carbonic anhydrase (CA II/IX) with Kis of 1.2 and 113.6 nM, respectively. hCAII-IN-1 has the potential for the research of cancer diseases[1].
Quinethazone is an orally active diuretic agent and is also a weak inhibitor of carbonic anhydrase. Quinethazone can be used for hypertension research[1][2].
hA2A/hCA XII modulator 1 (compound 14), a triazolopirazine, is a potent hA2A adenosine receptor (hA2AAR) antagonist with Kis of 6.4 nM, 4.819 μM, >30 μM for hA2AAR, hA1AR, hA3AR, respectively. hA2A/hCA XII modulator 1 is a potent human carbonic anhydrase XII (hCA XII) inhibitor with Kis of 6.2 nM, 46 nM, 466 nM, 8.351 μM for hCA XII, hCA II, hCA IX and hCA I, respectively. hA2A/hCA XII modulator 1 has the potential for cancer research[1].
Zonisamide-d4 (AD 810-d4) is the deuterium labeled Zonisamide. Zonisamide (AD 810) is an inhibitor of zinc enzyme carbonic anhydrase (CA), with Kis of 35.2 nM and 20.6 nM for human mitochondrial isozyme hCA II and hCA V, respectively. Zonisamide has antiepileptic activity. Zonisamide can be used for the rsearch for epilepsy, seizures and Parkinson's disease[1][2].
Compounds 6B and 14g showed significant inhibitory effect on tumor related subtype HCA IX with low nanomolar potency, while 6K was effective on HCA XII. Compounds 6B, 14g and 6K can be considered as the leading molecules for the development of future cancer therapeutic drugs based on new mechanisms of action.
AChE/hCA I/II-IN-1 (Compound 6) is a potent inhibitor of AChE/Hca with IC50 values of 22.21, 60.79 and 66.64 nM for AChE, Hca Ⅰ and Hca Ⅱ. AChE/hCA I/II-IN-1 can be used for the rsearch for glaucoma, Alzheimer's disease, diabetes[1].
CDK2-IN-11 (compound 9d) is a potent CDK2 inhibitor with an IC50 of 6.4 μM, and KI values of 23.4 nM, 56.3 nM and 44.3 nM for hCA II, hCA IX and hCA XII, respectively. CDK2-IN-11 can be used for researching anticancer[1].
hCAII-IN-8, an amide, is a highly selective carbonic anhydrase (CA) inhibitor with an IC50 value of 0.18 μM against hCA II[1].
hCAI/II-IN-1 (Compound 3h) is a human carbonic anhydrase I and II (hCA I/II) inhibitor with IC50 values of 0.047 µM and 0.024 µM against hCA I and hCA II, respectively[1].
Carbonic anhydrase inhibitor 13 (compound 7) is a potent carbonic anhydrase (CA) inhibitor, which features 3-methylthiazolo[3,2-a]benzimidazole moiety (as a tail) connected to the zinc anchoring benzenesulfonamide moiety via ureido linker[1].
hCAIX/XII-IN-4 (compound 6c) is a potent CAIX/XII inhibitor with the Ki values of 4.5 nM, 23.6 nM, >10000 nM and >10000 nM for CAXII, CAIX, CAI and CAⅡ, respectively[1].
Disulfamide, an orally active diuretic, is a carbonic anhydrase inhibitor with the IC50 value of 0.07 μM. Disulfamide leads to diuresis by inhibiting carbonic anhydrase and preventing the reabsorption of sodium and bicarbonate in the proximal tubule[1].
hCAIX-IN-11 (Compound 5d) is a selective carbonic anhydrase IX and XII inhibitor with Ki s of 32.7 and 623.5 nM for hCA IX and hCA XII, respectively. hCA IX and hCA XII are transmembrane isoforms which have been characterized as biomarkers for several types of tumors. The hCA XII assists in maintenance of acid-base homoeostasis in normal as well as tumor cells[1].
Benzthiazide is a long-acting diuretic[1] and a hypertension agent. Benzthiazide is an inhibitor of carbonic anhydrase 9 (CA9), with Kis of 8.0, 8.8 and 10 nM for CA9, CA2 and CA1, respectively. Benzthiazide also suppresses proliferation of cancer cells[2].
hCAI/II-IN-4 (compound 6d) is a potent dual hCA I/II inhibitor with Ki values of 16.95, 15.22 and 27.04 nM for hCA I, hCA II and hCA Ⅸ, respectively. hCAI/II-IN-4 has anti-hypoxia activities and low toxicity. hCAI/II-IN-4 can be used for acute mountain sickness (AMS) research[1].
ALP/Carbonic anhydrase-IN-1 (Compound 1e) is a dual carbonic anhydrase (CA) and alkaline phosphatase (ALP) inhibitor. ALP/Carbonic anhydrase-IN-1 shows IC50 values of 0.44 µM, 1.61 µM, 0.51 µM, and 0.107 µM for CA-II, CA-IX, CA-XII, and ALP, respectively[1].
hCAXII-IN-2 (compound 5i) is a potent human carbonic anhydrase XII (hCA XII) and hCA IX inhibitor with Ki values of 84.2 nM and 268.5 nM, respectively. hCAXII-IN-2 shows less active against hCA I and hCA II[1].
Dorzolamide Hcl(L671152 Hcl; MK507 Hcl) is an anti-glaucoma agent, which is a carbonic anhydrase inhibitor.Target: carbonic anhydrase (CA)Dorzolamide hydrochloride is a carbonic anhydrase inhibitor. It is an anti-glaucoma agent, and acts by decreasing the production of aqueous humour [1]. Glaucoma was induced in the right eye of adult Wistar rats by episcleral venous occlusion. One experimental group was administered dorzolamide hydrochloride 2%-timolol 0.5% combination eye drops, while the other experimental group was administered dorzolamide hydrochloride2% eye drops. Control groups had surgery without drug administration. Drug application was initiated either 2 weeks before surgery (Group A), from the day of surgery (Group B), 2 weeks after surgery (Group C), or 4 weeks after surgery (Group D). RGCs were labeled by intratectal Fluorogold injections and counted from flat-mount preparations, and IOP was measured using Tonopen. Both dorzolamide-timolol combination and dorzolamide hydrochloride, when applied topically, significantly reduced IOP and improved RGC densities in experimental eyes when compared to control eyes. Earlier initiation, as well as longer duration of drug application, resulted in higher RGC densities [2].Clinical indications: Glaucoma; Ocular hypertensionFDA Approved Date: 1995Toxicity: Dizziness, headache, shortness of breath, slow heartbeat, severe asthma, cardiac arrest
Topiramate (McN 4853) lithium is a broad-spectrum antiepileptic agent. Topiramate lithium is a GluR5 receptor antagonist. Topiramate produces its antiepileptic effects through enhancement of GABAergic activity, inhibition of kainate/AMPA receptors, inhibition of voltage-sensitive sodium and calcium channels, increases in potassium conductance, and inhibition of carbonic anhydrase[1][2][3].
Carbonic anhydrase inhibitor 7 (compound 5b) is a potent inhibitor of human carbonic anhydrase (hCA), with Kis of 6.5 nM, 7.1 nM, 72.1 nM, and 255.8 nM for hCA IX, hCA II, hCA XII and hCA I, respectively[1].
Indisulam (E 7070) is a carbonic anhydrase inhibitor and a G1-targeting agent. Indisulam causes a blockade in the G1/S transition through inhibition of the activation of both cyclin-dependent kinase 2 (CDK2) and cyclin E. Shows anti-tumor activity in human colon and lung cancer cells[1][2].
hCAI/II-IN-2 (compound 2b) is a potent dual hCA I/II inhibitor with Ki values of 40.97, 15.15 and 61.88 nM for hCA I, hCA II and hCA Ⅸ. hCAI/II-IN-2 possesses anti-hypoxic activity against acute mountain sickness (AMS) and low cellular activity[1].
2-Aminobenzenesulfonamide is a carbonic anhydrase IX inhibitor.
Carbonic anhydrase is ubiquitous zinc-containing metalloenzyme present in prokaryotes and eukaryotes. Carbonic anhydrase can catalyze reversible conversion of carbon dioxide to bicarbonate and protons. Carbonic anhydrase can be used for the research of cancer, glaucoma, obesity and epilepsy[1][2].