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Tixagevimab

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(Heavy chain)
QMQLVQSGPE VKKPGTSVKV SCKASGFTFM SSAVQWVRQA RGQRLEWIGW IVIGSGNTNY
AQKFQERVTI TRDMSTSTAY MELSSLRSED TAVYYCAAPY CSSISCNDGF DIWGQGTMVT
VSSASTKGPS VFPLAPSSKS TSGGTAALGC LVKDYFPEPV TVSWNSGALT SGVHTFPAVL
QSSGLYSLSS VVTVPSSSLG TQTYICNVNH KPSNTKVDKR VEPKSCDKTH TCPPCPAPEF
EGGPSVFLFP PKPKDTLYIT REPEVTCVVV DVSHEDPEVK FNWYVDGVEV HNAKTKPREE
QYNSTYRVVS VLTVLHQDWL NGKEYKCKVS NKALPASIEK TISKAKGQPR EPQVYTLPPS
REEMTKNQVS LTCLVKGFYP SDIAVEWESN GQPENNYKTT PPVLDSDGSF FLYSKLTVDK
SRWQQGNVFS CSVMHEALHN HYTQKSLSLS PGK
(Light chain)
EIVLTQSPGT LSLSPGERAT LSCRASQSVS SSYLAWYQQK PGQAPRLLIY GASSRATGIP
DRFSGSGSGT DFTLTISRLE PEDFAVYYCQ HYGSSRGWTF GQGTKVEIKR TVAAPSVFIF
PPSDEQLKSG TASVVCLLNN FYPREAKVQW KVDNALQSGN SQESVTEQDS KDSTYSLSST
LTLSKADYEK HKVYACEVTH QGLSSPVTKS FNRGEC
(Disulfide bridge: H22-H96, H101-H106, H150-H206, H216-L216, H232-H’232, H235-H’235, H267-H327, H373-H431, H’22-H’96, H’101-H’106, H’150-H’206, H’226-L’216, H’267-H’327, H’373-H’431, L23-L89, L136-L196, L’23-L’89, L’136-L’196)

Tixagevimab

FDA 2021, 2021/12/8

ANTI VIRAL, CORONA VIRUS, PEPTIDE

Monoclonal antibody
Treatment and prevention of SARS-CoV-2 infection

FormulaC6488H10034N1746O2038S50
CAS2420564-02-7
Mol weight146704.817
  • 2196
  • AZD-8895
  • AZD8895
  • COV2-2196
  • Tixagevimab
  • Tixagevimab [INN]
  • UNII-F0LZ415Z3B
  • WHO 11776
  • OriginatorVanderbilt University
  • DeveloperAstraZeneca; INSERM; National Institute of Allergy and Infectious Diseases
  • ClassAntivirals; Monoclonal antibodies
  • Mechanism of ActionVirus internalisation inhibitors
  • RegisteredCOVID 2019 infections
  • 24 Dec 2021Pharmacodynamics data from a preclinical trial in COVID-2019 infections released by AstraZeneca
  • 16 Dec 2021Pharmacodynamics data from a preclinical trial in COVID-2019 infections released by AstraZeneca
  • 10 Dec 2021Registered for COVID-2019 infections (In the elderly, Prevention, In adults) in USA (IM) – Emergency Use Authorization

Tixagevimab/cilgavimab is a combination of two human monoclonal antibodiestixagevimab (AZD8895) and cilgavimab (AZD1061) targeted against the surface spike protein of SARS-CoV-2[4][5] used to prevent COVID-19. It is being developed by British-Swedish multinational pharmaceutical and biotechnology company AstraZeneca.[6][7] It is co-packaged and given as two separate consecutive intramuscular injections (one injection per monoclonal antibody, given in immediate succession).[2]

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Development

In 2020, researchers at Vanderbilt University Medical Center discovered particularly potent monoclonal antibodies, isolated from COVID-19 patients infected with a SARS-CoV-2 circulating at that time. Initially designated COV2-2196 and COV2-2130, antibody engineering was used to transfer their SARS-CoV-2 binding specificity to IgG scaffolds that would last longer in the body, and these engineered antibodies were named AZD8895 and AZD1061, respectively (and the combination was called AZD7442).[8]

To evaluate the antibodies’ potential as monoclonal antibody based prophylaxis (prevention), the ‘Provent’ clinical trial enrolled 5,000 high risk but not yet infected individuals and monitored them for 15 months.[9][10] The trial reported that those receiving the cocktail showed a 77% reduction in symptomatic COVID-19 and that there were no severe cases or deaths. AstraZeneca also found that the antibody cocktail “neutralizes recent emergent SARS-CoV-2 viral variants, including the Delta variant“.[7]

In contrast to pre-exposure prophylaxis, the Storm Chaser study of already-exposed people (post-exposure prophylaxis) did not meet its primary endpoint, which was prevention of symptomatic COVID-19 in people already exposed. AZD7442 was administered to 1,000 volunteers who had recently been exposed to COVID.[9]

Regulatory review

In October 2021, the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) started a rolling review of tixagevimab/cilgavimab, which is being developed by AstraZeneca AB, for the prevention of COVID-19 in adults.[11]

Also in October 2021, AstraZeneca requested Emergency Use Authorization for tixagevimab/cilgavimab to prevent COVID-19 from the U.S. Food and Drug Administration (FDA).[12][13]

Emergency use authorization

On 14 November 2021, Bahrain granted emergency use authorization.[14]

On 8 December 2021, the U.S. Food and Drug Administration (FDA) granted emergency use authorization of this combination to prevent COVID-19 (before exposure) in people with weakened immunity or who cannot be fully vaccinated due to a history of severe reaction to coronavirus vaccines.[15] The FDA issued an emergency use authorization (EUA) for AstraZeneca’s Evusheld (tixagevimab co-packaged with cilgavimab and administered together) for the pre-exposure prophylaxis (prevention) of COVID-19 in certain people aged 12 years of age and older weighing at least 40 kilograms (88 lb).[2] The product is only authorized for those individuals who are not currently infected with the SARS-CoV-2 virus and who have not recently been exposed to an individual infected with SARS-CoV-2.[2]

References

  1. ^ “Evusheld- azd7442 kit”DailyMed. Retrieved 4 January 2022.
  2. Jump up to:a b c d “Coronavirus (COVID-19) Update: FDA Authorizes New Long-Acting Monoclonal Antibodies for Pre-exposure Prevention of COVID-19 in Certain Individuals”U.S. Food and Drug Administration (FDA) (Press release). 8 December 2021. Retrieved 9 December 2021. Public Domain This article incorporates text from this source, which is in the public domain.
  3. ^ O’Shaughnessy, Jacqueline A. (20 December 2021). “Re: Emergency Use Authorization 104” (PDF). Food and Drug Administration. Letter to AstraZeneca Pharmaceuticals LP | Attention: Stacey Cromer Berman, PhD. Archived from the original on 29 December 2021. Retrieved 18 January 2022.
  4. ^ “IUPHAR/BPS Guide to PHARMACOLOGY”IUPHAR. 27 December 2021. Retrieved 27 December 2021.
  5. ^ “IUPHAR/BPS Guide to PHARMACOLOGY”IUPHAR. 27 December 2021. Retrieved 27 December 2021.
  6. ^ Ray, Siladitya (21 August 2021). “AstraZeneca’s Covid-19 Antibody Therapy Effective In Preventing Symptoms Among High-Risk Groups, Trial Finds”ForbesISSN 0015-6914Archived from the original on 21 August 2021. Retrieved 18 January 2022.
  7. Jump up to:a b Goriainoff, Anthony O. (20 August 2021). “AstraZeneca Says AZD7442 Antibody Phase 3 Trial Met Primary Endpoint in Preventing Covid-19”MarketWatchArchived from the original on 21 August 2021. Retrieved 18 January 2022.
  8. ^ Dong J, Zost SJ, Greaney AJ, Starr TN, Dingens AS, Chen EC, et al. (October 2021). “Genetic and structural basis for SARS-CoV-2 variant neutralization by a two-antibody cocktail”. Nature Microbiology6 (10): 1233–1244. doi:10.1038/s41564-021-00972-2ISSN 2058-5276PMC 8543371. PMID 34548634.
  9. Jump up to:a b Haridy, Rich (23 August 2021). “”Game-changing” antibody cocktail prevents COVID-19 in the chronically ill”New Atlas. Retrieved 23 August 2021.
  10. ^ “AZD7442 PROVENT Phase III prophylaxis trial met primary endpoint in preventing COVID-19”AstraZeneca (Press release). 20 August 2021. Retrieved 15 October 2021.
  11. ^ “EMA starts rolling review of Evusheld (tixagevimab and cilgavimab)”European Medicines Agency. 14 October 2021. Retrieved 15 October 2021.
  12. ^ “AZD7442 request for Emergency Use Authorization for COVID-19 prophylaxis filed in US”AstraZeneca US (Press release). 5 October 2021. Retrieved 15 October 2021.
  13. ^ “AZD7442 request for Emergency Use Authorization for COVID-19 prophylaxis filed in US”AstraZeneca (Press release). 5 October 2021. Retrieved 15 October 2021.
  14. ^ Abd-Alaziz, Moaz; Elhamy, Ahmad (14 November 2021). Macfie, Nick (ed.). “Bahrain authorizes AstraZeneca’s anti-COVID drug for emergency use”ReutersArchived from the original on 23 November 2021. Retrieved 18 January 2022.
  15. ^ Mishra, Manas; Satija, Bhanvi (8 December 2021). Dasgupta, Shounak (ed.). “U.S. FDA authorizes use of AstraZeneca COVID-19 antibody cocktail”ReutersArchived from the original on 13 January 2022. Retrieved 18 January 2022.

“Tixagevimab”Drug Information Portal. U.S. National Library of Medicine.

  • “Cilgavimab”Drug Information Portal. U.S. National Library of Medicine.
  • Clinical trial number NCT04625972 for “Phase III Double-blind, Placebo-controlled Study of AZD7442 for Post-exposure Prophylaxis of COVID-19 in Adults (STORM CHASER)” at ClinicalTrials.gov
  • Clinical trial number NCT04625725 for “Phase III Double-blind, Placebo-controlled Study of AZD7442 for Pre-exposure Prophylaxis of COVID-19 in Adult. (PROVENT)” at ClinicalTrials.gov
Tixagevimab (teal, right) and cilgavimab (purple, left) binding the spike protein RBD. From PDB7L7E.
Combination of
TixagevimabMonoclonal antibody
CilgavimabMonoclonal antibody
Clinical data
Trade namesEvusheld
Other namesAZD7442
License dataUS DailyMedTixagevimab
Routes of
administration
Intramuscular
ATC codeJ06BD03 (WHO)
Legal status
Legal statusUS: ℞-only via emergency use authorization[1][2][3]
Identifiers
KEGGD12262
Clinical data
Drug classAntiviral
ATC codeNone
Identifiers
CAS Number2420564-02-7
DrugBankDB16394
UNIIF0LZ415Z3B
KEGGD11993
Chemical and physical data
FormulaC6488H10034N1746O2038S50
Molar mass146706.82 g·mol−1
Clinical data
Drug classAntiviral
ATC codeNone
Identifiers
CAS Number2420563-99-9
DrugBankDB16393
UNII1KUR4BN70F
KEGGD11994
Chemical and physical data
FormulaC6626H10218N1750O2078S44
Molar mass149053.44 g·mol−1

/////////////////Tixagevimab, ANTI VIRAL, CORONA VIRUS, PEPTIDE, Monoclonal antibody,  SARS-CoV-2 , WHO 11776, 2196, AZD-8895, AZD 8895, COV2-2196, COVID 19

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DR ANTHONY CRASTO

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DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO Ph.D

DR ANTHONY MELVIN CRASTO, Born in Mumbai in 1964 and graduated from Mumbai University, Completed his Ph.D from ICT, 1991,Matunga, Mumbai, India, in Organic Chemistry, The thesis topic was Synthesis of Novel Pyrethroid Analogues, Currently he is working with GLENMARK LIFE SCIENCES LTD, Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 30 plus yrs, Prior to joining Glenmark, he has worked with major multinationals like Hoechst Marion Roussel, now Sanofi, Searle India Ltd, now RPG lifesciences, etc. He has worked with notable scientists like Dr K Nagarajan, Dr Ralph Stapel, Prof S Seshadri, Dr T.V. Radhakrishnan and Dr B. K. Kulkarni, etc, He did custom synthesis for major multinationals in his career like BASF, Novartis, Sanofi, etc., He has worked in Discovery, Natural products, Bulk drugs, Generics, Intermediates, Fine chemicals, Neutraceuticals, GMP, Scaleups, etc, he is now helping millions, has 9 million plus hits on Google on all Organic chemistry websites. His friends call him Open superstar worlddrugtracker. His New Drug Approvals, Green Chemistry International, All about drugs, Eurekamoments, Organic spectroscopy international, etc in organic chemistry are some most read blogs He has hands on experience in initiation and developing novel routes for drug molecules and implementation them on commercial scale over a 30 PLUS year tenure till date June 2021, Around 35 plus products in his career. He has good knowledge of IPM, GMP, Regulatory aspects, he has several International patents published worldwide . He has good proficiency in Technology transfer, Spectroscopy, Stereochemistry, Synthesis, Polymorphism etc., He suffered a paralytic stroke/ Acute Transverse mylitis in Dec 2007 and is 90 %Paralysed, He is bound to a wheelchair, this seems to have injected feul in him to help chemists all around the world, he is more active than before and is pushing boundaries, He has 9 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 90 Lakh plus views on dozen plus blogs, 233 countries, 7 continents, He makes himself available to all, contact him on +91 9323115463, email amcrasto@gmail.com, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 33 lakh plus views on New Drug Approvals Blog in 233 countries......https://newdrugapprovals.wordpress.com/ , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc

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