Regulatory, ethical and legal issues in biotechnology Semester 2 2012 ChemTech Case study (Draft) Development of an avian flu vaccine for the Australian poultry industry The company ChemTech is a...

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Regulatory, ethical and legal issues in biotechnology


Semester 2 2012


ChemTech Case study

(Draft)



Development of an avian flu vaccine for the Australian poultry industry


The company

ChemTech is a successful biotechnology company developing and manufacturing veterinary small molecule anti-infective drugs for production animals.
The company has decided to move into the development of recombinant vaccines for the treatment of respiratory diseases in intensively reared pigs and poultry. The company’s first project will be the development of a recombinant flu vaccine to treat avian influenza A (AIA) for the poultry industry in Australia. The company intends to develop the recombinant vaccine in house and outsource vaccine manufacture to Bioproperties Pty Ltd and field testing in a commercial hatchery (Baiada Poultry) under a collaborative research agreement with the Poultry Cooperative Research Centre Poultry Hub.

Company capabilities

ChemTech supports an active R&D section with expertise in chemical synthesis and analytical chemistry, microbiology and small molecule drug development and testing
in vitro
and
in vivo
. The company has laboratory facilities for chemistry, microbiology and cell culture and an animal facility capable of handling small animals and birds. It intends to establish capabilities for genetic engineering.

The AIA vaccine project

The company proposes to develop a human recombinant adenovirus serotype 5 (AD5) vector encoding the haemagglutinin (HA) genes of pathogenic H5 or H7 AIA serotypes. The vaccine will be injected into chick eggs. The project has the following stages

In house laboratory studies (ChemTech)


1 Development and in vitro evaluation of the vaccine construct


1.1 Construction of replication-incompetent AD5 vector with H5 or H7 gene inserts

1.1.1 PCR-amplification of H5 or H7 genes from a plasmid template using suitable primer pairs
1.1.2 Insertion of the HA gene into the shuttle plasmid (pAdApt) to generate a plasmid with H5 or H7 gene (pH5/H7) and human CMV early promoter

1.2 Construction of the recombinant Ad5 vector (Ad5-H5/H7)

1.2.1 Co-transfection of human PER. C6 cells (Crucell) with the plasmid (pH5/H7) and the AdEasy™ adenoviral vector system.
1.2.2 Separation of Ad5 vector clone by plaque assays
1.2.3 Validation of the construct by DNA sequencing
1.2.4 Titration (ifu/mL) by the Adeno-X rapid titer kit
1.2.5 stability & cell location of vector

2 Antibody production in chicks


2.1 Vaccination
by
automated injection
of single-doses of vaccine (106
to 1010
infectious units) into specific-pathogen-free (SPF) chicken eggs at day 18 of incubation (SPAFAS Australia Pty Ltd). SPF eggs meet European Pharmacopoeia SPF requirements.

2.2 Evaluation of antibody response

2.2.1 Determination of percent of chicks showing seroconversion at 21 and 42 days after hatch
HI inhibition or agar gel immunodiffusion (AGID) determination of antibody titres in serum samples from individual chickens against a pathogenic H5 or H7 strain.
2.2.2 Determination of effective vaccination infection dose
2.3.2 Characterisation of antibody binding (affinity, avidity, specificity & cross reactivity) to homologous AI strains using standard tests

3 Demonstration of protective efficacy by AI challenge

3.1 Challenge of cohorts of vaccinated and un-vaccinated SPF chicks hatched from bought-in SPC eggs (SPAFAS) with escalating doses (x times EID50) of a current AI strain with HA homology with the H5 or H7 vaccinating strain.
3.2 Assessment of vaccine efficacy by
i) morbidity and mortality in vaccinated vs non-vaccinated chicks
ii) monitoring of AI infection and viral shedding in chicks by detection of viral RNA by AG precipitation & ELISA in cloacal samples
iii) antibody titres from serum samples

4 Manufacture of the vaccine (Bioproperties)

Virus (Ad5-H5/H7) culture in human PER 6 cells in serum free suspension bioreactors and chromatographic purification
Formulation of vaccine doses for
in ovo
delivery
Commercial automated injector for eggs

5 Field trial under commercial use conditions


Demonstration of clinical efficacy in broilers
Baiada Poultry commercial hatchery and broiler farm
5.1 1000 42 day chicken broiler study of vaccinated vs 1000 normally bred broilers under commercial
hatchery
conditions
5.2 Assessment of vaccine efficacy as per 3.2
5.3 Assessment of vaccine safety (Pharmacology)
5.4 Assessment of environmental impact
Senior management at Chemtech have requested a summary report from the Project Manager on the regulatory requirements associated with the project work described above to assist them in planning execution of the project and to ensure the company is aware of all legal obligations relating to project studies undertaken in house and outsourced to vendors. Management wishes to be fully informed of its legal responsibilities as vaccine developer and contractor. This would include regulatory requirements relating to product approval of the novel vaccine and licenses, permits and accreditations for the listed studies. At this stage management does not require information about the pharmacological evaluation of the vaccine for safety (5.3) and possible environmental impact (5.4).
Answered Same DayDec 23, 2021

Answer To: Regulatory, ethical and legal issues in biotechnology Semester 2 2012 ChemTech Case study (Draft)...

Robert answered on Dec 23 2021
126 Votes
A report on the regulatory requirements for the establishment of an influenza vaccine.
Abstract
Regulatory requirements associated with the project of development of recombinant
vaccines for the treatment of respiratory diseases in intensively reared pigs and poultry. The
company’s first project being the development of a recombinant flu vaccine to treat avian
influenza A (AIA) for the poultry industry in Australia requires that all regulations are adhered
to. The company intends to develop the recombinant vaccine in house and outsource vaccine
manufacture to Bioproperties Pty Ltd and field testing i
n a commercial hatchery Baiada Poultry
under a collaborative research agreement with the Poultry Cooperative Research Centre Poultry
Hub.
A number of standards regulate the operations of laboratories throughout the world to
standardize practices and ensure optimum utilization of resources. Laboratories are required to
provide quality services to their customers while at the same time expected to avoid conflict of
interest. The technical knowledge of the personnel is a requirement and documentation of all
plans and activities is a necessary aspect.
1. Introduction
A number of regulations and standards exist that regulate the activities of laboratories and
therefore these should be adhered to. According to Australian Standard 2005, a laboratory can be
held liable in law and therefore should carry out its calibration and testing activities in
accordance to the international standards. Management system covers all the work that is carried
out in the laboratory and in order to avoid conflict of interest, the activities of personnel should
be clearly defined. The laboratory should have technical as well as managerial personnel who
have the authority and resources to carry out their duties. The laboratory personnel and
management should be free from internal or external pressures both financial and economic that
may have an impact on the results.
The laboratory should protect its customers through policies and procedures. Clearly
define the management structure and organization of the laboratory. The responsibility,
interrelationship and authority of the personnel should be clearly specified. Provide supervision
of calibration staff by a qualified person. Have a technical management with the responsibility of
technical operations. The laboratory should appoint a member of staff into the position of quality
manager and appoint assistants to management. The personnel should be made aware of the
importance and relevance of their activities (Australian Standard 2005).
According to the Australian standard 2005, a laboratory should have a management
system that is appropriate to the scope of activities it undertakes. The policies for the
management system relates to the quality such as quality policy statement. The laboratory shall
have established and maintained procedures that control all documents forming part of the
management system. It is the responsibility of the laboratory to maintain procedures for
reviewing requests contracts and tenders.
Methods to be used for tenders and contracts are documented, understood and define.
The laboratory should also have the resources in order to meet its requirements. Subcontracted
work should be kept with a subcontractor that is competent meaning they must comply with the
international standards. Any subcontracted work should be informed to the customers and
laboratory is responsible for the works of the subcontractor and shall maintain a list of all the
subcontractors.
The Organization for Economic Co-operation and Development (OECD) is an
intergovernmental body that is composed of 29 nations from the industrialized countries in
Europe, North America and the pacific. The members meet to harmonize, coordinate and discuss
issues that are of mutual concern while working together in response to international problems.
The works are carried out by more than two hundred committees that are specialized and
subsidiary groups that are composed of delegates from member countries (OECD series on
principles of good laboratory practice and Compliance monitoring 2007).
The organization is responsible for ensuring chemical safety practiced in the safety
division and environmental health. Safety division and the environmental health periodically
publishes documents that are free of charge in six different series principles of good laboratory
practices and compliance monitoring, testing and assessment, risk management, pesticides,
harmonization of regulatory oversight in biotechnology and chemical accidents (OECD series on
principles of good laboratory practice and Compliance monitoring 2007).
In order to counter schemes of implementation which are different and could cause an
impediment to global trade in chemical, the organization members have pursued good laboratory
practices and test methods that are internationally harmonized. Principles of good laboratory
practices were adopted by the organization in the year 1981. A new expert group was formed in
the years 1995 and 1996 with the mandate of revising and updating the principles (OECD series
on principles of good laboratory practice and Compliance monitoring 2007).
The principles of good laboratory practices have their main purpose being the promotion
of development in quality test data. Test data that is comparable forms the basis for mutually
accepting data among countries. Reliance of test data developed in foreign countries confidently
will reduce chances of duplicating tests and save time and resources. Application of the
principles helps in the creation of technical barriers that hamper trade therefore improving the
protection of the environment and human health (OECD series on principles of good laboratory
practice and Compliance monitoring 2007).
The principles of good laboratory practice are applicable to non clinical safety testing for
test items that are contained in pesticides, veterinary drugs, pharmaceutical products, pesticides,
food additives, industrial chemicals and feed additives. The...
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