CimaVax-EGF

Source: Wikipedia, the free encyclopedia.
Hu-rhEGF-rP64k/Mont
Vaccine description
TargetHuman epidermal growth factor
Vaccine typeprotein "subunit" / conjugate
Clinical data
Trade namesCimaVax-EGF; CIMAVAX[1]
Other namesrecombinant human EGF-rP64K/montanide ISA 51 vaccine
Routes of
administration		intramuscular[1]
Legal status
Legal status
  • Not approved / Rx-only
Identifiers
DrugBank

CimaVax-EGF is a

recombinant human epidermal growth factor (EGF) conjugated to a protein carrier.[2]

The vaccine was developed by the

Havana, Cuba, and made available to the Cuban population in 2011.[3][4] There are agreements in place to test it in the United States, Japan, and some European countries.[5] It is currently available in Cuba, Colombia, Bosnia and Herzegovina, Peru and Paraguay.[6] In October 2015 Serbia's Institute of Virology, Vaccines and Sera (AKA Torlak Institute) signed a memorandum for use in 30 patients as part of a study.[7] CimaVax is relatively cheap to produce and store, and has low toxicity.[5] It costs approximately USD $1 per shot to manufacture.[8]: 144  Side effects of the vaccine appear to be mild, and include chills, fever, and feeling sick.[9][10]

Mechanism

CimaVax is an active

antibodies targeting EGF itself. The EGF is chemically linked to the Neisseria meningitidis outer protein P64k for immunogenicity;[2] Montanide ISA 51 is used as an adjuvant to potentiate the immune response.[11][10] The epidermal growth factor receptor (EGFR) is hijacked by many types of cancer, including cancers of the lung, colon, kidney, and head and neck. By raising antibodies against EGF, which is EGFR's major ligand, the concentrations of EGF in the blood are reduced. Thus CimaVax does not target the cancer cells directly, but is expected to work against these cancers by denying the cancers the growth stimulus they require.[10][12] For this reason, the Roswell Park Comprehensive Cancer Center group thinks that it may prove most useful as a preventive vaccine rather than as a cancer therapy per se.[5]

Research

Cuba

Early trials showed a trend towards improved survival among vaccinated test subjects.

aluminum hydroxide as an adjuvant, and when patients receive a low dose of cyclophosphamide three days before vaccine administration.[10] Cyclophosphamide is thought to temporarily block the body's natural immune tolerance to EGF, thereby increasing antibody titers.[10]

Researchers caution that the early results to date have been in relatively small, early-stage trials with patients that were carefully selected based on predefined inclusion and exclusion criteria, and given specialized oncology care; they may therefore not be representative of most patients who might benefit from the vaccine.[10] It has been urged that CimaVax be tested in patients with earlier-stage NSCLC cancer and in patients who are not candidates for chemotherapy, and that research be conducted to determine which subgroups of NSCLC patients do and don't respond to the vaccine.[10] It has been suggested that CimaVax may also be effective in other types of cancer that are dependent on EGF/EGFR, including many cases of prostate cancer.[10]

In Cuba, CimaVax-EGF has completed a

phase IV clinical trial for NSCLC in 2017. It is approved as a "maintenance treatment for patients with stage IIIB/IV NSCLC".[14]

International

The United States embargo against Cuba forbids US citizens from seeking medical treatment in Cuba. However, some cancer patients from the US have defied the embargo and travelled to Cuba for treatment with CimaVax.[15]

Trials are being organized in the United States, the European Union, Japan,

United States Food and Drug Administration authorized[16] Roswell Park Comprehensive Cancer Center to conduct a PhaseI/II clinical trial of CimaVAX in patients with non-small cell lung cancer.[17] By the middle of the following month, nearly 200 people had volunteered to be subjects in the trial.[18]

In September 2018, Principal Investigator Grace Dy shared the initial results of the first Roswell Park trial.

non-small cell lung cancer (NSCLC) when administered at the doses normally recommended for each agent individually.[19] Notably, they observed durable responses to the combination treatment in patients who were unlikely to benefit from nivolumab alone due to low tumor levels of PD-L1, suggesting that the combination may work better than either agent individually.[19]

The final results of this early trial were released in March 2019.[20] The results were in line with the September 2018 report, with the additional finding that patients receiving combination therapy in this trial were more likely to develop robust early antibody responses to CIMAvax as compared with what had been observed in earlier studies with CIMAvax alone.[20]

An ongoing

head and neck squamous-cell carcinoma, as well as patients with advanced NSCLC but with high PD-L1 levels, who will be treated with pembrolizumab in combination with CIMAvax instead of nivolumab.[20] As of 2023, accural for this phase II trial is ongoing.[21]

See also

References

  1. ^ a b "RESOLUCIÓN No. 2016006539 DE 25 de Febrero de 2016 Por la cual se concede un Registro Sanitario" (PDF). República de Colombia Ministerio de Salud y Protección Social Instituto Nacional de Vigilancia de Medicamentos y Alimentos – INVIMA. Retrieved 28 December 2023.
  2. ^
    S2CID 38130134
    .
  3. ^ Dillow C (8 September 2011). "Cuba Announces Release of the World's First Lung Cancer Vaccine". Popular Science. Retrieved 2011-12-11.
  4. ^ Grillo I (23 April 2015). "Cuba has had a lung cancer vaccine for years". GlobalPost. Retrieved 2014-05-24.
  5. ^
    Wired
    . Retrieved 2015-05-13.
  6. ^ Tamayo H (8 September 2016). "Vacuna contra cáncer de pulmón llega al país". El Tiempo (Colombia). Retrieved 2016-09-09.
  7. ^ a b "Cuban anti-cancer vaccines soon to be available in Serbia". Tanjug. October 21, 2015.
  8. ISBN 978-0-300-23003-1
    .
  9. ^ "Can you tell me about the CimaVax lung cancer vaccine?". Cancer Research UK. 12 May 2015. Retrieved 2015-07-02.
  10. ^
    PMID 20387330
    .
  11. S2CID 27200881
    .
  12. ^
    PMID 18349395
    .
  13. PMID 22024351
    .
  14. PMID 28348561
    .
  15. ^ "Why an American went to Cuba for cancer care". BBC News. 19 April 2017. Retrieved 27 January 2023.
  16. ^ Davis H (26 October 2016). "Roswell Park gets go-ahead to test Cuban lung cancer vaccine". The Buffalo News. Retrieved 3 December 2016.
  17. ^ "CIMAvax Vaccine and Nivolumab in Treating Patients With Stage IIIB-IV Non-small Cell Lung Cancer - Full Text View - ClinicalTrials.gov". clinicaltrials.gov. Retrieved 2017-04-02.
  18. ^ Hoshaw L (2 December 2016). "Cuba Has a Lung Cancer Vaccine; Now U.S. Patients Will Test It". KQED News. Retrieved 3 December 2016.
  19. ^ a b c "Roswell Park Lung Cancer Expert Shares Initial Findings From First North American Study of CIMAvax". Roswell Park Comprehensive Cancer Center. September 26, 2018. Retrieved 10 April 2019.
  20. ^ a b c "With Safety Analysis Now Complete, Roswell Park Moves Forward With Expanded Study of CIMAvax". Roswell Park Comprehensive Cancer Center. March 30, 2019. Retrieved 10 April 2019.
  21. S2CID 259082182
    .
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