Novartis candidate vaccine Bexsero shows significant potential in providing broad coverage against meningococcal serogroup B infections
MenB responsible for over 80% of meningococcal cases in Canadian infants under 1 year of age
* Pivotal study in more than 1,800 infants shows Bexsero?? induces robust immune response when given alone or with other routine vaccines in different vaccination schedules1 * Meningococcal serogroup B disease has highest incidence in infants and young children2 and can lead to death within 24 to 48 hours of first symptoms3 * Bexsero?? can help protect the majority of people at risk for infection, as data shows the vaccine also induces robust immune response in toddlers and adolescents1, 4, 5, 6, 7
MONTREAL, June 14, 2011 /CNW/ - New data from a pivotal study in more than 1,800 infants show that Novartis candidate vaccine Bexsero?? (Multicomponent Meningococcal Serogroup B Vaccine) induces a robust immune response to meningococcal serogroup B when given alone or when co-administered with other routine vaccines1. These results also show that Bexsero can fit into various vaccination schedules in the first year of life1, 4, when the likelihood of contracting this often-deadly disease is greatest2. The study also demonstrated that Bexsero has an acceptable tolerability profile4.
Data from another pivotal study in more than 1,500 toddlers shows that Bexsero provides protective immune response when used as a booster in toddlers already primed, or after two doses in those not previously vaccinated with Bexsero5,6. A third study presented showed that Bexsero induces a strong immune response in adolescents against meningococcal serogroup B (MenB)7. The data were presented at The European Society for Paediatric Infectious Diseases (ESPID) in The Hague, The Netherlands.
These data are included in the comprehensive clinical program with Bexsero in more than 8,000 infants, toddlers, adolescents and adults which served as the basis of the registration file submitted to the European Medicines Agency (EMA) in December 20101, 4, 5, 6, 7, 8.
MenB is the most common cause of bacterial meningitis9, 10 for which there is no effective routine vaccine2, and it is responsible for up to 80% of meningococcal cases in infants under one year of age in Canada12 and 68 per cent of the cases in adolescents12. Survivors may suffer permanent brain damage, learning disabilities, hearing loss, and limb loss13.
"The serious and long-term effects of MenB are often devastating to its victim, family members and the community at large13," said Jamie Findlow PhD, Deputy Head of the Health Protection Agency, Vaccine Evaluation Unit, Manchester, UK. "The rapid disease progression3 and flu-like symptoms14 of MenB can be difficult to recognize, particularly in infants14, making prevention through vaccination the most effective way to control this disease9."
Bexsero has the potential to provide protection against a broad range of MenB strains15.
Infant Study Design and Results Novartis Study P12, ESPID Abstracts 1205 and 1187
* This Phase IIb open-label immunogenicity study analysis randomized more than 1,800 infants to receive Bexsero at 2, 4, 6 months or at 2, 3, 4 months with or without routine vaccines (7-valent pneumococcal glyco-conjugate-vaccine and a combined diphtheria-toxoid, tetanus-toxoid, inactivated-polio, acellular-pertussis, hepatitis B and Haemophilus influenza type-b vaccine). Immune response was measured using the human serum bactericidal antibody (hSBA) assay1.
* The study met its primary endpoints, and showed that the majority of infants vaccinated with Bexsero, at either dosing schedule with or without routine vaccines, achieved hSBA ≥ 1:5 against all vaccine antigens in tested MenB strains (H44/76, 5/99, NZ98/254)1.
* More than 99% of participants receiving Bexsero at 2, 4, 6 months (concomitantly or without routine-vaccines) or at 2, 3 and 4 months (with routine-vaccines) developed hSBA titers ??:5 against strains 44/76 and 5/99. For NZ98/254 the correlate was reached or exceeded in 79% (2, 4, 6 months with routine-vaccines), 87% (2, 4, 6 months without routine-vaccines) and 81% (2, 3, 4 months with routine vaccines)1.
* Data also show that responses to the routine vaccine antigens, when co-administered with Bexsero, were generally similar, except for a slightly lower immune response to pneumococcal serotype 6B, which was not clinically meaningful1.
* The data also show that Bexsero, when administered alone, had a reactogenicity profile that was comparable to those of the routine vaccines. Fever, which is a common event following routine childhood immunizations, was observed more frequently in infants who received Bexsero together with routine infant vaccines compared to infants receiving routine vaccines alone4. Fever was generally low-grade, mild and of short duration, with more than 95% of cases resolving within 24-48 hours4.
Toddler Study Results and Design Novartis Study P13E1, ESPID Abstracts 877 and 900
* This Phase III, open-label immunogenicity and tolerability extension analysis included more than 1,500 toddlers who had been administered a three-dose primary series of Bexsero at 2, 4, 6 months. Toddlers were randomized to receive either a fourth (booster) dose of Bexsero concomitantly with measles, mumps, rubella, and varicella vaccine (MMR-V), or Bexsero at 12 months followed by MMR-V at 13 months. Immunogenicity was measured using the hSBA assay and was assessed one month post booster dose5.
* This study met all primary endpoints. The data show Bexsero to be highly immunogenic in this age group against all vaccine antigens in all MenB strains tested (H44/76, 5/99, NZ98/254), with 11-19 fold increases in hSBA titers5.
* The percentage of toddlers with an hSBA ≥ 1:5 who received Bexsero alone or Bexsero concomitantly with MMR-V was 100% against H44/76 and 5/99, and 97% and 94% against strain NZ98/254, respectively5.
* Results show that immune responses to Bexsero and MMR-V were not affected when both vaccines were administered concomitantly, and that adverse events, notably fever, were not increased by the concomitant use of Bexsero and MMR-V5.
* The study also evaluated a two-dose schedule in toddlers, suitable for a catch-up vaccination, when administered alone or concomitantly with MMRV vaccine6.
* In this open-label study, healthy toddlers not previously vaccinated with Bexsero either received MMR-V at 12 months followed by two doses of Bexsero at 13 and 15 months (alone), or MMR-V and Bexsero at 12 months and Bexsero at 14 months (concomitant). Immunogenicity against three reference strains was assessed in subsets one month later by hSBA assay using human complement. Solicited post-vaccination reactions were recorded for seven days6.
* Immune responses were similar in both groups; hSBA GMTs for alone and concomitant groups were 271 and 248 against strain H44/76; 599 and 627 against strain 5/99; 43 and 32 against NZ98/254, respectively. Seroprotection rates (% hSBA ≥ 5) against strains H44/76, 5/99, and NZ98/254 were 100%, 100% and 96% in the concomitant group, respectively, and 100% against all three strains in the alone group6.
* Two doses of Bexsero two months apart were sufficient to elicit protective immune responses against all three reference strains for the component antigens, unaffected by concomitant MMR-V administration, with minimal impact on reactogenicity, so facilitating catch-up vaccination in current toddler vaccination schedules6.
Adolescent Study Design and Results Novartis Study P10, ESPID Abstract 905
* In an observer-blind study, 11-17 year-old adolescents were randomized to receive one to three doses of Bexsero or placebo at baseline, one and/or two months later. Primary immunogenicity outcome was a titer ?? in a serum bactericidal assay using human complement (hSBA) against three test strains selected to evaluate the contribution of individual vaccine antigens. Tolerability was assessed by solicited local and systemic reactions within seven days of each study vaccination. Adverse events were monitored throughout the study7.
* This study met all primary endpoints. One month after vaccination 92-97% of recipients of one Bexsero dose, 99-100% after two or three Bexsero doses and 29-50% of placebo recipients had hSBA titers ?? against the three test strains7. Similar proportions of placebo and Bexsero recipients reported solicited local (89-94%) and systemic (70-79%) reactions after the first study injection7. Bexsero induced robust immune response and had an acceptable tolerability profile following one, two, or three doses and in all schedules administered. No evidence of increased reactogenicity was observed with two or three doses compared with one dose of Bexsero. Fever observed in adolescents vaccinated with Bexsero was comparable to those who received placebo alone7.
About Meningococcal Disease Meningococcal disease is a sudden17, aggressive illness that can lead to death within 24 to 48 hours of the first symptoms3. Survivors may suffer permanent brain damage, learning disabilities, hearing loss, and limb loss13. The disease is a leading cause of bacterial meningitis9, 13 - an infection of the membrane around the brain and spinal cord3 - and sepsis - a bloodstream infection13c. Five main serogroups of meningococcal bacteria (A, B, C, W-135 and Y) cause the majority of all cases around the world18.
Licensed vaccines are available to protect against meningococcal disease caused by serogroups A, C, W-135 and Y3; however, MenB remains an important unmet public health challenge2. MenB is the most common cause of bacterial meningitis9, 10 for which there is no effective routine vaccine2.
About Bexsero The Novartis Bexsero vaccine was developed using a pioneering approach known as "reverse vaccinology19." In contrast to conventional methods of developing vaccines, reverse vaccinology decodes the genetic makeup (genome sequence) of MenB and selects those proteins that are most likely to be broadly-effective vaccine candidates19. Bexsero (also known as 4CMenB) contains multiple components, which independently are highly immunogenic and, taken together, have the potential to protect against a broad range of disease-causing strains15. To date, more than 8,000 infants, toddlers, and adults have been enrolled in studies of Bexsero1, 4, 5, 6, 7, 8.
Disclaimer The foregoing release contains forward-looking statements that can be identified by terminology such as "potential," "can," "promise," "may," "could," or similar expressions, or by express or implied discussions regarding potential marketing approvals for Bexsero, or the timing of any such approvals, or regarding potential future revenues from Bexsero. You should not place undue reliance on these statements. Such forward-looking statements reflect the current views of management regarding future events, and involve known and unknown risks, uncertainties and other factors that may cause actual results with Bexsero to be materially different from any future results, performance or achievements expressed or implied by such statements. There can be no guarantee that Bexsero will be approved for sale in any market or at any particular time. Nor can there be any guarantee that Bexsero will achieve any particular levels of revenue in the future. In particular, management's expectations regarding Bexsero could be affected by, among other things, unexpected regulatory actions or delays or government regulation generally; unexpected clinical trial results, including unexpected new clinical data and unexpected additional analysis of existing clinical data; competition in general; government, industry and general public pricing pressures; the company's ability to obtain or maintain patent or other proprietary intellectual property protection; the impact that the foregoing factors could have on the values attributed to the Novartis Group's assets and liabilities as recorded in the Group's consolidated balance sheet, and other risks and factors referred to in Novartis AG's current Form 20-F on file with the US Securities and Exchange Commission. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those anticipated, believed, estimated or expected. Novartis is providing the information in this press release as of this date and does not undertake any obligation to update any forward-looking statements contained in this press release as a result of new information, future events or otherwise.
About Novartis Pharmaceuticals Canada Inc.
Novartis Pharmaceuticals Canada Inc. provides healthcare solutions that address the evolving needs of patients and societies. Focused solely on healthcare, Novartis offers a diversified portfolio to best meet these needs: innovative medicines, cost-saving generic pharmaceuticals, preventive vaccines, diagnostic tools and consumer health products. Novartis is the only company with leading positions in these areas. In 2010, the Company invested close to $100 million in research and development and conducted clinical trials across the country seeking new treatments in Ophthalmology, Respiratory diseases, Neurosciences (including MS), Immunology and Infectious diseases, Cardiovascular, Oncology (including Hematology) and organ transplantation. In addition to Novartis Pharmaceuticals Canada Inc., the Novartis Group consists of Novartis Animal Health Canada Inc., Novartis Consumer Health Canada Inc., Alcon Canada Inc. and Sandoz Canada Inc. For further information about Novartis Canada, please consult www.novartis.ca<http://www.novartis.ca>.
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1. Gossger, N et al. Immunogenicity of an Investigational Multicomponent Meningococcal Serogroup B Vaccine (4CMenB) Administered With or Without Routine Infant Vaccinations in Different Schedules, presented at the 29th European Society for Paediatric Infectious Diseases Conference, June 7-11, 2011, The Hague, The Netherlands. 2. Perrett KP, Pollard AJ. Towards an improved serogroup B Neisseria meningitidis vaccine. Expert Opin Biol Ther. 2005; 5:1611-1625. 3. World Health Organization. Meningococcal meningitis fact sheet. Available at: http://www.who.int/mediacentre/factsheets/fs141/en<http://www.who.int/mediacentre/factsheets/fs141/en/>. Accessed on June 2, 2011. 4. Beeretz, I et al. Reactogenicity and Safety of Multicomponent Meningococcal Serogroup B Vaccine (4CMenB) Administered With or Without Routine Infant Vaccinations in Different Schedules, presented at the 29th European Society for Paediatric Infectious Diseases Conference, June 7-11, 2011, The Hague, The Netherlands. 5. Vesikari, T et al. Booster Dose at 12 Months of an Investigational Meningococcal Serogroup B Vaccine (4CMenB) in Healthy Toddlers Previously Primed at 2,4,6 Months, presented at the 29th European Society for Paediatric Infectious Diseases Conference, June 7-11, 2011, The Hague, The Netherlands. 6. Prymula, R et al. Catch-Up Vaccination of Healthy Toddlers with an Investigational Multicomponent Meningococcal Serogroup B Vaccine (4CMenB) - Exploration of a Two-Dose Schedule, presented at the 29th European Society for Paediatric Infectious Diseases Conference, June 7-11, 2011, The Hague, The Netherlands. 7. Santolaya, ME et al. Immunogenicity and Tolerability of an Investigational Multicomponent Meningococcal Serogroup B (4CMenB) Vaccine in Healthy Adolescents, presented at the 29th European Society for Paediatric Infectious Diseases Conference, June 7-11, 2011, The Hague, The Netherlands. 8. Novartis Data on File. 9. World Health Organization. Meningococcal position paper. Weekly epidemiological record No. 44, 2002, 77, 329-340. Available at: http://www.who.int/immunization/wer7740meningococcal_Oct02_position_paper.pdf. Accessed on June 2, 2011. 10. Harrison LH. Prospects for vaccine prevention of meningococcal infection. Clin Microbiol Rev. 2006; 19(1):142-1643. Available at: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1360272/. Accessed on June 2, 2011. at: http://www.hpa.org.uk/web/HPAweb&HPAwebStandard/HPAweb_C/1234859711901. Accessed on June 2, 2011. 11. Public Health Agency of Canada. Canada Comm Dis Rep. 2009; 36:1-40. 12. Health Protection Agency. Infectious Diseases: Meningococcal disease. Meningococcal Reference Unit isolates of Neisseria Menengitidis: England and Wales, by serogroup & epidemiological year, 1998/99-2008/09. Available and Canadian Communicable Disease Report (CCDR), April 2009, Volume 36, ACS-3 13. Centers for Disease Control and Prevention. Epidemiology and Prevention of Vaccine-Preventable Diseases (The Pink Book: Course Textbook). 10th Edition, 2nd printing. February 2008 update. Available at: http://www.cdc.gov/vaccines/pubs/pinkbook/default.htm. Accessed on June 2, 2011. 14. Mayo Foundation for Medical Education and Research. Meningitis: Symptoms. August 2010. Available at: http://www.mayoclinic.com/health/meningitis/DS00118/DSECTION=symptoms. Accessed on June 2, 2011. 15. Donnelly, J et al. Qualitative and quantitative assessment of meningococcal antigens to evaluate the potential strain coverage of protein-based vaccines. Proceedings of the National Academy of Sciences. November 2010. Available at: http://www.pnas.org/content/early/2010/10/19/1013758107.full.pdf. Accessed on June 2, 2011. 16. Donnelly, J et al. Estimating the potential strain coverage in Europe of a multicomponent vaccine targeting serogroup B meningococci, presented at the European Monitoring Group on Meningococci (EMGM) meeting, 18-20 May 2011, Ljubljana, Slovenija. 17. Centers for Disease Control and Prevention. Meningitis: Diagnosis. June 2009 update. Available at: http://www.cdc.gov/meningitis/about/diagnosis.html. Accessed on June 2, 2011. 18. Schaffner, W. et al. The Changing Epidemiology of Meningococcal Disease Among US Children, Adolescents, and Young Adults. National Foundation for Infectious Diseases. November 2004.Available at: http://www.nfid.org/pdf/meningitis/FINALChanging_Epidemiology_of_Meningococcal_Disease.pdf. Accessed on June 2, 2011. 19. Rappuoli, R. Reverse vaccinology, a genome-based approach to vaccine development. Vaccine. 2001; 19: 2688-2691.
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Posted: June 2011