Captopril

Last updated
Captopril
Captopril structure.svg
Captopril-from-xtal-1980-3D-balls.png
Clinical data
Pronunciation /ˈkæptəprɪl/
Trade names Capoten, others
AHFS/Drugs.com Monograph
MedlinePlus a682823
Pregnancy
category
  • AU:D
Routes of
administration 		By mouth
ATC code
Legal status
Legal status
  • US: WARNING [1]
  • EU:Rx-only [2]
  • In general: ℞ (Prescription only)
Pharmacokinetic data
Bioavailability 70–75%
Metabolism Liver
Elimination half-life 1.9 hours
Excretion Kidney
Identifiers
  • (2S)-1-[(2S)-2-methyl-3-sulfanylpropanoyl]pyrrolidine-2-carboxylic acid
CAS Number
PubChem CID
IUPHAR/BPS
DrugBank
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
PDB ligand
CompTox Dashboard (EPA)
ECHA InfoCard 100.057.806 OOjs UI icon edit-ltr-progressive.svg
Chemical and physical data
Formula C9H15NO3S
Molar mass 217.28 g·mol−1
3D model (JSmol)
  • O=C(O)[C@H]1N(C(=O)[C@H](C)CS)CCC1
  • InChI=1S/C9H15NO3S/c1-6(5-14)8(11)10-4-2-3-7(10)9(12)13/h6-7,14H,2-5H2,1H3,(H,12,13)/t6-,7+/m1/s1 Yes check.svgY
  • Key:FAKRSMQSSFJEIM-RQJHMYQMSA-N Yes check.svgY
   (verify)

Captopril, sold under the brand name Capoten among others, is an angiotensin-converting enzyme (ACE) inhibitor used for the treatment of hypertension and some types of congestive heart failure. Captopril was the first oral ACE inhibitor found for the treatment of hypertension. [3] It does not cause fatigue as associated with beta-blockers. Due to the adverse drug event of causing hyperkalemia, as seen with most ACE Inhibitors, the medication is usually paired with a diuretic.

Contents

Captopril was patented in 1976 and approved for medical use in 1980. [4]

Structure–activity relationship

Captopril has an L-proline group which allows for it to be more bioavailable within oral formulations. The thiol moiety within the molecule has been associated with two significance adverse effects: the hapten or immune response. This immune response, also known as agranulocytosis, can explain the adverse drug events which may be seen in captopril with the allergic response, which would be: hives, severe stomach pain, difficulty breathing, swelling of the face, lips, tongue or throat. [5]

In terms of interaction with the enzyme, the molecule's thiol moiety will attach to the binding site of the ACE enzyme. This will inhibit the port at which the angiotensin-1 molecule would normally bind, therefore inhibiting the downstream effects within the renin-angiotensin system.

Medical uses

Drosophila ACE in complex with captopril (purple), PDB entry 2x8z Captopril 2x8z.png
Drosophila ACE in complex with captopril (purple), PDB entry 2x8z

Captopril's main uses are based on its vasodilation and inhibition of some renal function activities. These benefits are most clearly seen in:

Additionally, it has shown mood-elevating properties in some patients. This is consistent with the observation that animal screening models indicate putative antidepressant activity for this compound, although one study has been negative. Formal clinical trials in depressed patients have not been reported. [7]

It has also been investigated for use in the treatment of cancer. [8] Captopril stereoisomers were also reported to inhibit some metallo-β-lactamases. [9]

Adverse effects

Adverse effects of captopril include cough due to increase in the plasma levels of bradykinin, angioedema, agranulocytosis, proteinuria, hyperkalemia, taste alteration, teratogenicity, postural hypotension, acute renal failure, and leukopenia. [10] Except for postural hypotension, which occurs due to the short and fast mode of action of captopril, most of the side effects mentioned are common for all ACE inhibitors. Among these, cough is the most common adverse effect. Hyperkalemia can occur, especially if used with other drugs which elevate potassium level in blood, such as potassium-sparing diuretics. Other side effects are:

The adverse drug reaction (ADR) profile of captopril is similar to other ACE inhibitors, with cough being the most common ADR. [11] However, captopril is also commonly associated with rash and taste disturbances (metallic or loss of taste), which are attributed to the unique thiol moiety. [12]

Overdose

ACE inhibitor overdose can be treated with naloxone. [13] [14] [15]

History

In the late 1960s, John Vane of the Royal College of Surgeons of England was working on mechanisms by which the body regulates blood pressure. [16] He was joined by Sérgio Henrique Ferreira of Brazil, who had been studying the venom of a Brazilian pit viper, the jararaca ( Bothrops jararaca), and brought a sample of the viper's venom. Vane's team found that one of the venom's peptides selectively inhibited the action of angiotensin-converting enzyme (ACE), which was thought to function in blood pressure regulation; the snake venom functions by severely depressing blood pressure. During the 1970s, ACE was found to elevate blood pressure by controlling the release of water and salts from the kidneys.

Captopril, an analog of the snake venom's ACE-inhibiting peptide, was first synthesized in 1975 by three researchers at the U.S. drug company E.R. Squibb & Sons Pharmaceuticals (now Bristol-Myers Squibb): Miguel Ondetti, Bernard Rubin, and David Cushman. Squibb filed for U.S. patent protection on the drug in February 1976, which was granted in September 1977, and captopril was approved for medical use in 1980. [4] It was the first ACE inhibitor developed and was considered a breakthrough both because of its mechanism of action and also because of the development process. [17] [18] In the 1980s, Vane received the Nobel prize and was knighted for his work and Ferreira received the National Order of Scientific Merit from Brazil.

The development of captopril was among the earliest successes of the revolutionary concept of structure-based drug design. [19] The renin–angiotensin–aldosterone system had been extensively studied in the mid-20th century, and this system presented several opportune targets in the development of novel treatments for hypertension. The first two targets that were attempted were renin and ACE. Captopril was the culmination of efforts by Squibb's laboratories to develop an ACE inhibitor.

Ondetti, Cushman, and colleagues built on work that had been done in the 1960s by a team of researchers led by John Vane at the Royal College of Surgeons of England. The first breakthrough was made by Kevin K.F. Ng [20] [21] [22] in 1967, when he found the conversion of angiotensin I to angiotensin II took place in the pulmonary circulation instead of in the plasma. In contrast, Sergio Ferreira [23] found bradykinin disappeared in its passage through the pulmonary circulation. The conversion of angiotensin I to angiotensin II and the inactivation of bradykinin were thought to be mediated by the same enzyme.

In 1970, using bradykinin potentiating factor (BPF) provided by Sergio Ferreira, [24] Ng and Vane found the conversion of angiotensin I to angiotensin II was inhibited during its passage through the pulmonary circulation. BPF was later found to be a peptide in the venom of a lancehead viper (Bothrops jararaca), which was a “collected-product inhibitor” of the converting enzyme. Captopril was developed from this peptide after it was found via QSAR-based modification that the terminal sulfhydryl moiety of the peptide provided a high potency of ACE inhibition. [25]

Captopril gained FDA approval on April 6, 1981. The drug became a generic medicine in the U.S. in February 1996, when the market exclusivity held by Bristol-Myers Squibb for captopril expired.

Chemical synthesis

A chemical synthesis of captopril by treatment of L-proline with (2S)-3-acetylthio-2-methylpropanoyl chloride under basic conditions (NaOH), followed by aminolysis of the protective acetyl group to unmask the drug's free thiol, is depicted in the figure at right. [26]

Captopril synthesis 1Captopril synthesis 2
Captopril synthesis of Shimazaki, Watanabe, et al. Captopril synthesis.png
Captopril synthesis of Shimazaki, Watanabe, et al.
Patents: Design and synthesis: Improved synthesis: Captoprilsynthesis.svg
Patents: Design and synthesis: Improved synthesis:

Procedure 2 taken out of patent US4105776. See examples 28, 29a and 36.

Mechanism of action

Captopril blocks the conversion of angiotensin I to angiotensin II and prevents the degradation of vasodilatory prostaglandins, thereby inhibiting vasoconstriction and promoting systemic vasodilation. [33]

Pharmacokinetics

Unlike the majority of ACE inhibitors, captopril is not administered as a prodrug (the only other being lisinopril). [34] About 70% of orally administered captopril is absorbed. Bioavailability is reduced by presence of food in stomach. It is partly metabolised and partly excreted unchanged in urine. [35] Captopril also has a relatively poor pharmacokinetic profile. The short half-life necessitates dosing two or three times per day, which may reduce patient compliance. Captopril has a short half-life of 2–3 hours and a duration of action of 12–24 hours.

See also

Related Research Articles

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<span class="mw-page-title-main">Renin–angiotensin system</span> Hormone system

The renin–angiotensin system (RAS), or renin–angiotensin–aldosterone system (RAAS), is a hormone system that regulates blood pressure, fluid and electrolyte balance, and systemic vascular resistance.

<span class="mw-page-title-main">Angiotensin</span> Group of peptide hormones in mammals

Angiotensin is a peptide hormone that causes vasoconstriction and an increase in blood pressure. It is part of the renin–angiotensin system, which regulates blood pressure. Angiotensin also stimulates the release of aldosterone from the adrenal cortex to promote sodium retention by the kidneys.

<span class="mw-page-title-main">Bradykinin</span> Chemical compound

Bradykinin (BK) (Greek brady-, slow; -kinin, kīn(eîn) to move) is a peptide that promotes inflammation. It causes arterioles to dilate (enlarge) via the release of prostacyclin, nitric oxide, and endothelium-derived hyperpolarizing factor and makes veins constrict, via prostaglandin F2, thereby leading to leakage into capillary beds, due to the increased pressure in the capillaries. Bradykinin consists of nine amino acids, and is a physiologically and pharmacologically active peptide of the kinin group of proteins.

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References

  1. ↑ "FDA-sourced list of all drugs with black box warnings (Use Download Full Results and View Query links.)". nctr-crs.fda.gov. FDA . Retrieved 22 Oct 2023.
  2. ↑ "List of nationally authorised medicinal products Active substance: captopril" (PDF). ema.europa.eu. European Medicines Agency. 26 November 2020. Archived from the original (PDF) on 31 October 2021.
  3. ↑ Vidt DG, Bravo EL, Fouad FM (January 1982). "Medical intelligence drug therapy: captopril". The New England Journal of Medicine. 306 (4): 214–219. doi:10.1056/nejm198201283060405. PMID   7033784.
  4. 1 2 Fischer J, Ganellin CR (2006). Analogue-based Drug Discovery. John Wiley & Sons. p. 467. ISBN   978-3-527-60749-5.
  5. ↑ "Captopril: Uses, Dosage, Side Effects". Drugs.com. Retrieved 2021-10-31.
  6. ↑ Akif M, Georgiadis D, Mahajan A, Dive V, Sturrock ED, Isaac RE, Acharya KR (July 2010). "High-resolution crystal structures of Drosophila melanogaster angiotensin-converting enzyme in complex with novel inhibitors and antihypertensive drugs". Journal of Molecular Biology. 400 (3): 502–517. doi:10.1016/j.jmb.2010.05.024. PMID   20488190.
  7. ↑ Murphy DL, Mitchell PB, Potter WZ (1995). "Novel Pharmacological Approaches to the Treatment of Depression". In Bloom FE, Kupfer DJ (eds.). Psychopharmacology (The Fourth Generation of Progress ed.). Raven Press. pp. 1143–1153. ISBN   978-0-7817-0166-2.
  8. ↑ Attoub S, Gaben AM, Al-Salam S, Al Sultan MA, John A, Nicholls MG, et al. (September 2008). "Captopril as a potential inhibitor of lung tumor growth and metastasis". Annals of the New York Academy of Sciences. 1138 (1): 65–72. Bibcode:2008NYASA1138...65A. doi:10.1196/annals.1414.011. PMID   18837885. S2CID   24210204.
  9. ↑ Brem J, van Berkel SS, Zollman D, Lee SY, Gileadi O, McHugh PJ, et al. (January 2016). "Structural Basis of Metallo-β-Lactamase Inhibition by Captopril Stereoisomers". Antimicrobial Agents and Chemotherapy. 60 (1): 142–150. doi:10.1128/AAC.01335-15. PMC   4704194 . PMID   26482303.
  10. ↑ "Captopril (ACE inhibitor): side effects". lifehugger. 2008-07-09. Archived from the original on 2009-08-14. Retrieved 2009-05-02.
  11. ↑ Rossi S, ed. (2006). Australian Medicines Handbook. Adelaide: Australian Medicines Handbook.
  12. ↑ Atkinson AB, Robertson JI (October 1979). "Captopril in the treatment of clinical hypertension and cardiac failure". Lancet. 2 (8147): 836–839. doi:10.1016/S0140-6736(79)92186-X. PMID   90928. S2CID   32209360.
  13. ↑ Nelson L, Howland MA, Lewin NA, Smith SW, Goldfrank R, Hoffman RS, Flomenbaum N (2019). Goldfrank's toxicologic emergencies. New York: McGraw-Hill Education. p. 953. ISBN   978-1-259-85961-8.
  14. ↑ Meyler's Side Effects of Analgesics and Anti-inflammatory Drugs, Jeffrey K. Aronson, page 120.
  15. ↑ Ajayi AA, Campbell BC, Rubin PC, Reid JL (November 1985). "Effect of naloxone on the actions of captopril". Clinical Pharmacology and Therapeutics. 38 (5): 560–565. doi:10.1038/clpt.1985.224. PMID   2996820. S2CID   35799800.
  16. ↑ Crow JM. "Drugs with bite: The healing powers of venoms". New Scientist. Retrieved 2020-07-30.
  17. ↑ Bryan J (2009). "From snake venom to ACE inhibitor the discovery and rise of captopril". Pharmaceutical Journal. Retrieved 2015-01-08.
  18. ↑ Blankley CJ (September 1985). "Chronicals of Drug Discovery, vol. 2". Journal of Pharmaceutical Sciences. 74 (9): 1029–1030. doi:10.1002/jps.2600740942.
  19. ↑ Cushman DW, Cheung HS, Sabo EF, Ondetti MA (December 1977). "Design of potent competitive inhibitors of angiotensin-converting enzyme. Carboxyalkanoyl and mercaptoalkanoyl amino acids". Biochemistry Journal. 16 (25): 5484–5491. doi:10.1021/bi00644a014. PMID   200262.
  20. ↑ Ng KK, Vane JR (November 1967). "Conversion of angiotensin I to angiotensin II". Nature. 216 (5117): 762–766. Bibcode:1967Natur.216..762N. doi:10.1038/216762a0. PMID   4294626. S2CID   4289093.
  21. ↑ Ng KK, Vane JR (April 1968). "Fate of angiotensin I in the circulation". Nature. 218 (5137): 144–150. Bibcode:1968Natur.218..144N. doi:10.1038/218144a0. PMID   4296306. S2CID   4174541.
  22. ↑ Ng KK, Vane JR (March 1970). "Some properties of angiotensin converting enzyme in the lung in vivo". Nature. 225 (5238): 1142–1144. Bibcode:1970Natur.225.1142N. doi:10.1038/2251142b0. PMID   4313869. S2CID   4200012.
  23. ↑ Ferreira SH, Vane JR (June 1967). "The disappearance of bradykinin and eledoisin in the circulation and vascular beds of the cat". British Journal of Pharmacology and Chemotherapy. 30 (2): 417–424. doi:10.1111/j.1476-5381.1967.tb02148.x. PMC   1557274 . PMID   6036419.
  24. ↑ Smith CG, Vane JR (May 2003). "The discovery of captopril". FASEB Journal. 17 (8): 788–789. doi: 10.1096/fj.03-0093life . PMID   12724335. S2CID   45232683.
  25. ↑ Patlak M (March 2004). "From viper's venom to drug design: treating hypertension". FASEB Journal. 18 (3): 421. doi: 10.1096/fj.03-1398bkt . PMID   15003987. S2CID   1045315.
  26. ↑ Shimazaki M, Hasegawa J, Kan K, Nomura K, Nose Y, Kondo H, Ohashi T, Watanabe K (1982). "Synthesis of captopril starting from an optically active .BETA.-hydroxy acid". Chem. Pharm. Bull. 30 (9): 3139–3146. doi: 10.1248/cpb.30.3139 .
  27. ↑ DE 2703828,Cushman DW, Ondetti MA,"Prolinderivate und verwandte Verbindungen, Verfahren zu ihrer Herstellung und ihre Verwendung als Arzneimittel [Proline derivatives and related compounds, methods for their manufacturing and their use as a medicinal product]",published 1977-08-18, assigned to E.R. Squibb & Sons Inc.
  28. ↑ US 4046889,Ondetti MA, Cushman DW,issued 1977, assigned to Squibb
  29. ↑ US 4105776,Ondetti MA, Cushman DW,issued 1978, assigned to Squibb
  30. ↑ Ondetti MA, Rubin B, Cushman DW (April 1977). "Design of specific inhibitors of angiotensin-converting enzyme: new class of orally active antihypertensive agents". Science. 196 (4288): 441–444. Bibcode:1977Sci...196..441O. doi:10.1126/science.191908. PMID   191908.
  31. ↑ Cushman DW, Cheung HS, Sabo EF, Ondetti MA (December 1977). "Design of potent competitive inhibitors of angiotensin-converting enzyme. Carboxyalkanoyl and mercaptoalkanoyl amino acids". Biochemistry. 16 (25): 5484–5491. doi:10.1021/bi00644a014. PMID   200262.
  32. ↑ Nam DH, Lee CS, Ryu DD (December 1984). "An improved synthesis of captopril". Journal of Pharmaceutical Sciences. 73 (12): 1843–1844. doi:10.1002/jps.2600731251. PMID   6396401.
  33. ↑ Vallerand AH, Sanoski CA, Deglin JH (2014-06-05). Davis's drug guide for nurses (Fourteenth ed.). Philadelphia: F. A. Davis Company. ISBN   978-0-8036-4085-6. OCLC   881473728.
  34. ↑ Brown NJ, Vaughan DE (April 1998). "Angiotensin-converting enzyme inhibitors". Circulation. 97 (14): 1411–1420. doi: 10.1161/01.cir.97.14.1411 . PMID   9577953.
  35. ↑ Duchin KL, McKinstry DN, Cohen AI, Migdalof BH (April 1988). "Pharmacokinetics of captopril in healthy subjects and in patients with cardiovascular diseases". Clinical Pharmacokinetics. 14 (4): 241–259. doi:10.2165/00003088-198814040-00002. PMID   3292102. S2CID   46614471.
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