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Pharmaceuticals

The global biological and pharmaceutical Research and Development (R&D) function in GlaxoSmithKline is responsible for the generation of information and the acquisition of knowledge required to discover, develop, register, commercialise and effectively market innovative prescription medicines, vaccines and delivery systems for the treatment and prevention of human disease.

Fundamental to this goal is a thorough understanding of the diseases under investigation, increasingly through original work in genetics and predictive medicine research. In addition to the work to create new medicines and vaccines, extensive efforts are made to gain a clear understanding of the unmet needs of patients and healthcare providers as a contribution to the overall direction of R&D.

In 2000 Glaxo Wellcome and SmithKline Beecham together invested over £2.4 billion in pharmaceuticals R&D.

Approximately 16,000 staff are involved in biological and pharmaceutical R&D activities, at more than 20 sites worldwide. These sites include:

 
     
UK: Beckenham, Cambridge, Dartford, Greenford, Harlow, Stevenage, Tonbridge, Ware, Welwyn Garden City
USA: Research Triangle Park, North Carolina; Philadelphia, Upper Merion and Upper Providence, Pennsylvania; Santa Clara and Palo Alto, California
Belgium: Rixensart
Canada: Mississauga
France: Les Ulis, Rennes
Italy: Verona, Milan
Japan: Tsukuba Science City and Takasaki
Spain: Madrid
Switzerland: Geneva.
   
 

During 2000 a significant amount of work in R&D went into preparing plans and procedures for the optimal integration of key Glaxo Wellcome and SmithKline Beecham R&D processes, so that GlaxoSmithKline would be able to operate effectively and efficiently from day one of the merger. Despite the resources devoted to these activities, several significant new medicines were delivered on schedule to the markets.

Product approvals and submissions

In 2000 approvals were received for a number of new medicines and vaccines as well as several significant new indications and formulations for existing products, as summarised in the table below.

A number of other approvals were also received during 2000. Notable among these were US approvals for Malarone, a combination of atovaquone and proguanil to treat and prevent malarial infections and for the paediatric use of Relenza to treat influenza. European and US approvals were also received for a 2mg chewable-dispersible tablet formulation of Lamictal for the treatment of paediatric epilepsy.

A number of significant regulatory submissions were made during 2000. In the USA these included:

 
   
the first submission for GI198745, a 5-alpha reductase inhibitor for the treatment of benign prostatic hyperplasia, submitted to the FDA in late December 2000
a submission for a non-CFC metered dose inhaler formulation of Advair for asthma
a submission for the use of Avandia in combination with insulin, for the treatment of type 2 diabetes
a revised submission for an extra strength formulation of the antibiotic Augmentin for use in children
a submission for a sustained release formulation of the antibiotic Augmentin for use in adults (both Europe and USA)
a submission for the adolescent use of intranasal Imitrex for the treatment of migraine
submissions for Seroxat/Paxil for the treatment of Generalised Anxiety Disorder and Post-Traumatic Stress Disorder
submissions for Infanrix PeNta 5, a combined diptheria, tetanus, pertussis, polio and hepatitis B paediatric prophylactic vaccine
a submission for Twinrix, a combined hepatitis A and B prophylactic vaccine
in addition, the BLA for Bexxar, a novel treatment for non-Hodgkins lymphoma, was re-submitted to the FDA in September and is now under priority review.
   
In Europe significant regulatory submissions in 2000 included:
a once-daily dosing regimen for Epivir for HIV infections
the fluoroquinolone antibiotic Factive
a malaria prophylaxis indication for Malarone.
   
  The product development pipeline, shows considerable breadth and depth.

During 2000 several discovery projects were progressed through non-clinical safety testing and into early (Phase I) clinical development. These are listed in the table below.

These compounds are now undergoing rigorous non-clinical, clinical and commercial assessments leading to ‘proof of concept’ decisions over the next 12–18 months.

In addition to those compounds identified in the table below, the following compounds were also in-licensed during 2000:
 
   
GW650250, a mixed monoamine reuptake inhibitor in Phase II development, in-licensed from NeuroSearch in January 2000
SB 596168, a selective RNA polymerase inhibitor in Phase II development, for the treatment of solid tumours, in-licensed from Taiho in July 2000
repifermin, keratinocyte growth factor-2 in Phase II development, for wound care, mucositis and the treatment of inflammatory bowel disease, in-licensed from Human Genome Sciences in October 2000
SB 683698, a dual alpha4 integrin antagonist entering Phase II development, for the treatment of a range of inflammatory diseases including asthma, rheumatoid arthritis, inflammatory bowel disease and multiple sclerosis, in-licensed from Tanabe in December 2000.
   
 

In February 2001 GlaxoSmithKline completed two further in-licensing agreements. The first was with E Merck for SB 659746, a SSRI + 5HT1a receptor partial agonist in Phase II development for the treatment of depression and other mood disorders. The second was with Sepsicure for GR270773, a phospholipid anti-endotoxin emulsion entering Phase II development for the treatment of sepsis.


Products delivered to market

Product Approval date
(Country/Region)
Description  
Advair August 2000 (USA) A dry powder combination formulation of the long-acting bronchodilator salmeterol and the glucocorticoid anti-inflammatory agent fluticasone in the Diskus delivery system for the treatment of asthma
     
Agenerase October 2000 (Europe) A potent protease inhibitor for the treatment of HIV infections
     
Avandia July 2000 (Europe) A selective (PPAR agonist) oral combination treatment for type 2 diabetes in specific sub-groups of patients in combination with metformin or sulphonylurea
     
Flovent
Diskus
September 2000 (USA) A dry powder formulation of fluticasone in the multi-dose Diskus delivery system for the treatment of asthma
     
Infanrix HeXa October 2000 (Europe) A conjugated, recombinant paediatric vaccine for diphtheria, tetanus, pertussis, hepatitis B, inactivated polio prophylaxis and H. influenzae type B prophylaxis
     
Infanrix PeNta October 2000 (Europe) A recombinant paediatric vaccine for diphtheria, tetanus, pertussis, hepatitis B, and inactivated polio prophylaxis
     
Seretide June 2000 (UK, as Viani)
December 2000 (Europe)
A non-CFC metered dose inhaler formulation of the long-acting bronchodilator salmeterol and the glucocorticoid anti-inflammatory agent fluticasone for the treatment of asthma
     
Seroxat September 2000 (Europe) A selective serotonin reuptake inhibitor for the treatment of Post-Traumatic Stress Disorder
     
Seroxat November 2000 (Europe) A selective serotonin reuptake inhibitor for the treatment of Generalised Anxiety Disorder
     
Trizivir November 2000 (USA)
January 2001 (Europe)
A combination of three reverse transcriptase inhibitors in a single tablet that will significantly reduce the ‘pill burden’ and improve compliance for patients with HIV infections
   
Compounds progressed into Phase I clinical development
       
Compound Mechanism   Indication
GW473178 thrombin inhibitor   atrial fibrillation and venous thrombosis
GW501516 peroxisome proliferator-activator receptor agonist dyslipidaemia
GW660511 ACE/NEP inhibitor   hypertension (in-licensed from Zambon in October 2000)
SB 435495 Lp-PLA2 inhibitor   atherosclerosis
SB 207266 5HT receptor antagonist   atrial fibrillation
SB 273005 osteoclast vitronectin receptor antagonist osteoporosis & rheumatoid arthritis
SB 418790 beta3 adrenergic receptor agonist type 2 diabetes and obesity (in-licensed from Asahi in February 2000)
GW406381 second generation COX-2 inhibitor inflammatory pain
GW468816 glycine receptor antagonist   migraine prophylaxis & smoking cessation
SB 641257 reversible proton pump inhibitor   gastro-esopahgeal reflux disease (in-licensed from Yuhan in October 2000)
GW572016 Erb-B2 & EGRF dual kinase inhibitor solid tumours
GW150013 CCK-B receptor antagonist   anxiety disorders
GW597599 NK1 receptor antagonist   depression
Vaccines conjugated vaccine   prophylaxis against S. pneumoniae infections in the elderly population
  recombinant vaccine   prophylaxis against hepatitis E
  subunit vaccine   prophylaxis against influenza with new delivery method
       

Discontinuations
Following a request from the FDA, Lotronex, a treatment for irritable bowel syndrome, was voluntarily withdrawn from the US market in November 2000. This step was taken after in-depth discussions with the FDA about the interpretation of data relating to gastro-intestinal side effects which have occurred among patients treated with the product. These have included rare reports of fatalities, although no causal relationship with Lotronex has been established. Regulatory submissions in the rest of the world have now also been withdrawn.

The final analysis of data from the second of two Phase III clinical trials with GV150526, a glycine antagonist for the acute treatment of stroke, demonstrated no difference in clinical outcome from that seen with placebo and further work with this product has now been stopped. In addition, development of lotrafiban, an oral platelet aggregation inhibitor was stopped because of concerns over the safety of the compound.



Product development pipeline – as published in February 2001

Key      
       
MAA Marketing authorisation application (EU) Phase I Evaluation of clinical pharmacology, usually
NDA New drug application (USA)   conducted in volunteers
New indications and line extensions for Phase II Determination of dose and initial evaluation of
  marketed product   efficacy, conducted in a small number of patients
(v) Vaccine Phase III Large comparative study (compound versus placebo
(p) Pharmaccine   and/or established treatment) in patients to establish
Date of first submission to regulatory agency   clinical benefit and safety
Date of first regulatory approval (for MAA, this is    
  the first EU approval date)    
AL Approvable letter    
†  Label update    
       
       
       
        Estimated filing dates
Compound Type Indication Phase MAA NDA
Anti-microbials & Host Defence        
           

SB 275833

bacterial protein synthesis inhibitor (BPSI) prevention of recurrent sinusitis I    
SB 249417 anti-Factor IX monoclonal antibody severe sepsis & septic shock (also stroke) I    
Factive broad spectrum fluoroquinolone antibiotic respiratory tract infections – i.v. formulation III 2003 2003
Factive broad spectrum fluoroquinolone antibiotic respiratory & urinary tract infections –
oral formulation
Submitted S:Feb00 S:Dec99
Bactroban nasopharyngeal BPSI prevention of recurrent sinusitis II    
tafenoquine (SB 252263) 8-aminoquinoline malaria prophylaxis (adults) III 2002 2002
Augmentin SR beta lactam antibiotic respiratory tract infections
(incl. penicillin-resistant S. pneumoniae)
- modified release formulation
Submitted S:Dec00 S:Dec00
Augmentin ES beta lactam antibiotic acute otitis media (incl. penicillin-resistant
S. pneumoniae) – paediatric high-dose suspension
Submitted N/A S:Oct97
Malarone electron transport system inhibitor malaria treatment & prophylaxis Approved S:Sep00 A:Jul00
Anti-virals          
           

GR270773

phospholipid anti-endotoxin emulsion sepsis II    
Ziagen reverse transcriptase inhibitor HIV infection – in combination with Epivir II 2003 2003
GW433908 protease inhibitor; Agenerase pro-drug HIV infection III 2002 2002
Epivir reverse transcriptase inhibitor HIV infection – once daily dosing Submitted S:Sep00 2001
Trizivir Epivir/Retrovir/Ziagen combination tablet HIV infection Approved A:Jan01 A:Nov00
Zeffix reverse transcriptase inhibitor paediatric hepatitis B III 2001 2001
Valtrex/Zelitrex nucleoside analogue cold sores III N/A 2001
Valtrex/Zelitrex nucleoside analogue HSV suppression in immunocompromised patients III N/A 2002
Valtrex/Zelitrex nucleoside analogue prevention of HSV transmission III 2002 2002
Relenza neuraminidase inhibitor influenza prophylaxis III 2001 2001
Relenza neuraminidase inhibitor influenza treatment in patients with asthma/COPD† III 2001 2001
Cardiovascular & Urogenital        
           

GW409544

PPAR alpha/gamma dual agonist dyslipidaemia I    
GW473178 thrombin inhibitor atrial fibrillation & venous thrombosis I    
GW501516 PPAR agonist dyslipidaemia I    
GW660511 ACE/NEP inhibitor hypertension I    
SB 223412 tachykinin (NK3) receptor antagonist urinary incontinence (also COPD) I    
SB 249417 anti-Factor IX monoclonal antibody stroke (also severe sepsis & septic shock) I    
SB 424323 indirect thrombin inhibitor atrial fibrillation & stroke prevention I    
SB 435495 Lp-PLA2 inhibitor atherosclerosis I    
SB 207266 5HT4 receptor antagonist atrial fibrillation II    
SB 237376 potassium-calcium channel blocker cardiac arrhythmia II    
enrasentan (SB 217242) endothelial cell receptor antagonist congestive heart failure II 2004 2004
telmisartan angiotensin II antagonist hypertension – in combination with
hydrochlorothiazide
III 2001 N/A
GI198745 5-alpha reductase inhibitor benign prostatic hyperplasia (also alopecia) Submitted 2001 S:Dec00
GI198745 5-alpha reductase inhibitor alopecia (also BPH) II    
Tranilast endothelial cell proliferation/migration inhibitor restenosis III 2001 2001
Coreg beta blocker severe heart failure III N/A 2001
Metabolic & Musculoskeletal        
           

repifermin

Keratinocyte Growth Factor-2 wound care & IBD II    
GI181771 CCK-A receptor agonist obesity & gallstone prophylaxis I    
GW427353 beta3 adrenergic receptor agonist type 2 diabetes & obesity I    
SB 418790 beta3 adrenergic receptor agonist type 2 diabetes & obesity I    
GI262570 PPAR gamma agonist type 2 diabetes III 2003 2003
Avandia insulin action enhancer type 2 diabetes – in combination with insulin Submitted   S:Feb00
SB 273005 osteoclast vitronectin receptor antagonist osteoporosis (also rheumatoid arthritis) I    
Neurology & Gastro-intestinal        
           

GW273293

sodium channel inhibitor epilepsy (also bipolar disorder) II    
GW406381 Cox-2 inhibitor (second generation) pain including inflammatory pain I    
GW468816 glycine receptor antagonist migraine prophylaxis (also smoking cessation) I    
SB 204269 anticonvulsant epilepsy ll    
SB 271046 5HT6 receptor antagonist cognitive impairment I    
SB 641257 (YH 1885) reversible proton pump antagonist gastro-esophageal reflux disease I    
ReQuip non-ergot dopamine agonist Parkinson’s disease – controlled release formulation II 2003 2003
nabumetone Q non-steroidal anti-inflammatory osteoarthritis & pain III 2002 2002
Imigran/Imitrex 5HT1 agonist migraine – needle-free injection formulation II 2003 2003
Imigran/Imitrex 5HT1 agonist adolescent migraine – nasal formulation Submitted S:Feb00 S:Dec99
Naramig/Amerge 5HT1 agonist menstrual migraine prophylaxis III 2001 2001

Oncology

         
           
GW572016 Erb-B2 and EGFR dual kinase inhibitor solid tumours I    
SB 251353 CXC chemokine prevention of chemotherapy-induced cytopaenias
& stem cell mobilisation
I    
SB 408075 tumour activated pro-drug
(maytansine-antibody conjugate)
colorectal cancer – second line therapy I   2004
SB 596168 selective RNA polymerase inhibitor solid tumours II    
Hycamtin topo-isomerase I inhibitor colorectal cancer – second line therapy II 2004 2004
Hycamtin topo-isomerase I inhibitor small cell & non-small cell lung cancer
- first line therapy
II 2004 2004
Hycamtin topo-isomerase I inhibitor myelodysplastic syndrome III 2001 2001
Hycamtin topo-isomerase I inhibitor small cell lung cancer – oral second line therapy III 2002 2002
Hycamtin topo-isomerase I inhibitor ovarian cancer – first line therapy III   2004
Bexxar I131 radiolabelled anti-B1 monoclonal antibody non-Hodgkin’s lymphoma Submitted N/A S:Sep00

Psychiatry

         
           

GW468816

glycine receptor antagonist smoking cessation
(also migraine)
I    
GW150013 CCK-B receptor antagonist anxiety disorders ll    
GW597599 NK1 receptor antagonist depression I    
SB 243213 5HT2c receptor antagonist depression I    
SB 659746A (EMD68843) SSRI + 5HT1a receptor partial agonist depression ll   2004
GW320659 (1555U88) noradrenaline re-uptake inhibitor attention deficit hyperactivity disorder II   2004
GW650250 mixed monoamine re-uptake inhibitor depression II    
Seroxat/Paxil selective serotonin re-uptake inhibitor depression – dispersible tablets III 2002 TBD
Seroxat/Paxil CR selective serotonin re-uptake inhibitor premenstrual dysphoric disorder – controlled
release formulation
III TBD 2002
Seroxat/Paxil selective serotonin re-uptake inhibitor generalised anxiety disorders Approved A:Nov00 S:Apr00
Seroxat/Paxil selective serotonin re-uptake inhibitor post-traumatic stress disorder Approved A:Sep00 S:Jul00

Respiratory & Inflammation

       
           

GW328267

adenosine A2 agonist asthma & COPD I    
fluticasone/salmeterol beta2 agonist/inhaled corticosteroid rhinitis – intranasal combination product I 2003 2003
SB 223412 tachykinin (NK3) receptor antagonist COPD (also urinary incontinence) I    
SB 683698 (TR14035) dual alpha4 integrin antagonist (VLA4) asthma & rheumatoid arthritis I    
SB 273005 osteoclast vitronectin receptor antagonist rheumatoid arthritis (also osteoporosis) I    
Ariflo PDE lV inhibitor asthma II    
Ariflo PDE lV inhibitor COPD III TBD 2002
mepolizumab (SB 240563) anti-IL 5 monoclonal antibody asthma – steroid sparing II    
Flovent inhaled corticosteroid asthma – once daily dosing III N/A 2001
Flixotide/Flovent inhaled corticosteroid COPD Approved A:Sep99 2001

Non-CFC Metered Dose Inhaler propellants (GR106642)

     

Serevent

beta2 agonist asthma & COPD III 2003 2003
Flixotide/Flovent inhaled corticosteroid asthma & COPD Approved A:Apr97 2001
Ventolin beta2 agonist asthma & COPD Approved A:Jun97 AL:Jan01
Seretide/Advair beta2 agonist/inhaled corticosteroid asthma Approved A:Jun00 S:Dec00
Diskus/Accuhaler (dry powder inhaler)      

Seretide/Advair

beta2 agonist/inhaled corticosteroid COPD III 2001 2001
Seretide/Advair beta2 agonist/inhaled corticosteroid paediatric asthma Approved A:Sep98 2002
Seretide/Advair beta2 agonist/inhaled corticosteroid asthma – first line therapy III 2001 2001
Serevent beta2 agonist COPD III 2001 2001
Ventolin beta2 agonist asthma & COPD Approved A:Dec95 AL:Jul00
Hepatitis Vaccines (child/adol.)        
           
Twinrix 2 doses recombinant combined hepatitis A and B prophylaxis (child/adol.) III 2001 2002
Twinrix 3 doses (US) recombinant combined hepatitis A and B prophylaxis (adults) Submitted N/A Submitted
Extra strength hepatitis B recombinant extra strength hepatitis B prophylaxis
(poor/non-responders)
III 2001 TBD
Hepatitis E recombinant hepatitis E prophylaxis I    

Paediatric Vaccines

       
           
Infanrix PeNta-HepB-IPV recombinant diphtheria, tetanus, pertussis, hepatitis B and
inactivated polio prophylaxis
Approved Approved Submitted
Infanrix HeXa-Hep B-IPV/Hib conjugated/recombinant diphtheria, tetanus, pertussis, hepatitis B,
inactivated polio prophylaxis and Haemophilus
influenzae type B prophylaxis
Approved Approved TBD
S. pneumoniae paediatric conjugated S. pneumoniae disease prophylaxis for children III 2003  
MMR – varicella live attenuated measles, mumps, rubella and varicella prophylaxis III 2002 TBD
Rotarix live attenuated – oral rotavirus prophylaxis II 2004 2004
N. meningitidis A/C conjugated meningitis prophylaxis II 2004  
Meningitis B (Cuba) subunit meningitis B prophylaxis ll   TBD

Other Vaccines

         
           
Boostrix subunit adolescent/adult booster for diphtheria, tetanus
and pertussis
Approved Approved 2002
Epstein-Barr Virus recombinant EBV prophylaxis II    
Malaria recombinant malaria prophylaxis II    
Human
papillomavirus
recombinant prophylaxis of HPV infections II    
Simplirix recombinant genital herpes prophylaxis II    
New influenza subunit influenza prophylaxis (new delivery) I 2004  
HIV recombinant HIV prophylaxis I    
S. pneumoniae elderly conjugated S. pneumoniae disease prophylaxis I    
Pharmaccines for Treatment of Chronic Infectious Diseases or Cancer    
           

SB M00026

recombinant treatment of chronic hepatitis B II    
SB 249553 recombinant treatment of lung cancer/melanoma II    
GW419458 DISC treatment of genital herpes II    
GW/PowderJect recombinant hepatitis B treatment I    
           
Summary of pipeline    
       

Phase I

Phase II Phase III Filed

SB 275833 

Bactroban*

Factive*

Factive

SB 249417

Ziagen*

tafenoquine (SB 252263)

Augmentin*

GW409544 SB 207266 GW433908 Malarone*
GW473178  SB 237376 Zeffix* Epivir*
GW501516  enrasentan (SB 217242) Valtrex/Zelitrex* Trizivir
GW660511  GI198745 Relenza* GI198745
SB 223412 ReQuip* telmisartan* Imigran/Imitrex*
SB 424323 Imigran/Imitrex* Tranilast Bexxar
SB 435495 Hycamtin* GI262570 Seroxat/Paxil*
GI181771 GW320659 (1555U88) nabumetone Q* Flixotide/Flovent*
GW427353 GW650250 Naramig/Amerge* Ventolin*
SB 418790 mepolizumab (SB 240563) Hycamtin* Seretide/Advair*
SB 273005 GR270773 Seroxat/Paxil* Avandia*
GW406381 GW273293 Ariflo Twinrix 3 doses (v)
GW468816 SB 596168 Flovent* Infanrix PeNta – Hep B-IPV (v)
SB 271046 SB 683698 (TR14035) Serevent* Infanrix HeXa – Hep B-IPV/Hib (v)
SB 641257 (YH1885) Ariflo Seretide/Advair* Boostrix (v)
GW572016 repifermin

Coreg*

 
SB 251353 SB 204269 Twinrix 2 doses (v)  
SB 408075 GW150013 Extra strength Hepatitis B (v)  
GW597599 SB 659746A (EMD 68843) S pneumoniae (v)  
SB 243213 N. Meningitidis A/C (v) MMR-varicella (v)  
GW328267 Rotarix (v)    
fluticasone/salmeterol* Epstein-Barr virus (v)    
SB 223412 Malaria (v)    
Hepatitis E (v) Human papilloma virus (v)    
New Influenza (v) Simplirix (v)    
HIV (v) Meningitis B (Cuba) (v)    
S. pneumoniae (v) SB-M00026 (p)    
GW/PowderJect technology (p) SB 249553 (p)    
  GW419458 (p)    
       
       

The content of the drug development portfolio will change over time as new compounds progress from discovery to development and from development to the market. Owing to the nature of the drug development process, it is not unusual for some compounds, especially those in early stages of investigation, to be terminated as they progress through development.

For competitive reasons, new projects in pre-clinical development have not been disclosed and some project types may not have been identified.

   
  R&D processes
Much of the process re-design work conducted by Glaxo Wellcome and SmithKline Beecham in earlier years has now been fully implemented within R&D. In both organisations the focus during 2000 was on the consolidation of these new processes within a unified GlaxoSmithKline organisation. Considerable effort has gone into aligning quantitative performance measures with the new processes, so that the productivity of R&D can be effectively monitored in terms of the value added to the overall business. There are already benefits from these initiatives and many high quality new molecules are now in early clinical assessment. There is also good evidence from independent benchmarking that both Glaxo Wellcome and SmithKline Beecham have some of the fastest product development times within the industry.

The learnings from previous re-design work have been brought into full effect within GlaxoSmithKline so that the traditional functional barriers between Research, Development, Commercial and Manufacturing no longer exist within the organisation. Several key multi-disciplinary matrix organisations have been created to ensure continuity across the whole discovery to launch process. These include:
 
   
Centres of Excellence for Drug Discovery to effectively integrate late-stage research and early-stage development
New Product Development to integrate clinical, regulatory and commercial activities
New Product Supply to align the scale-up and subsequent manufacture of the physical product.
   
 

These are described in more detail below.

There is now a clear focus on a unified approach to the generation and demonstration of commercial product value to customers. These customers include patients, healthcare professionals, budget holders and regulators, and each population has its own needs in terms of assessing the value of a new product. R&D is now positioned to ensure that, as well as developing the right products, it also generates the right information about these products. Increasingly this means not only safety, efficacy and quality information but also evidence of product value through measures such as overall reductions in healthcare utilisation, increasing length or quality of life and increased workplace productivity.

Early drug discovery and new technologies
Over the past five years both Glaxo Wellcome and SmithKline Beecham invested heavily in establishing and integrating new technologies that will harness the full therapeutic potential offered by the elucidation of the human genome. High-throughput (HT) technologies such as HT gene sequencing, HT chemistry and HT screening are now fully established and mean that GlaxoSmithKline has substantial resources to identify significant numbers of novel molecular targets, make structurally diverse compounds and efficiently screen these compounds against such targets. In addition, HT biology technologies will help us determine the most relevant therapeutic applications of new drugs modulating pathological mechanisms that may underpin several different diseases. These technologies are the cornerstone of activities within Genetics and Discovery Research and are designed to provide a steady stream of validated drug targets and suitable series of lead compounds to the newly-created Centres of Excellence for Drug Discovery.

Complementary to these new technologies has been the work carried out in Glaxo Wellcome over the past three years to develop ways of associating disease with a patient’s genetic make up. GlaxoSmithKline now aims to identify the genes most relevant to common diseases with large unmet medical needs, such as asthma, non-insulin dependent diabetes, migraine, osteoarthritis, metabolic syndrome, depression, chronic obstructive pulmonary disease, early onset heart disease and Alzheimer’s disease. To further these initiatives, large international collaborative studies have now been initiated for six of these diseases. These networks bring together clinicians and other experts in the diagnosis of these diseases with centres skilled in analysing genetic and clinical data.

Many of the applications of genetic science to healthcare will be driven by single nucleotide polymorphism (SNP) high-density mapping. This new technology can be likened to a road map, with SNPs acting as signposts that tell scientists where they are on the genome. Both Glaxo Wellcome and SmithKline Beecham were members of The SNP Consortium launched in April 1999. The consortium, which comprises 12 pharmaceutical and technology companies, five academic centres and The Wellcome Trust, is producing an ordered high-density SNP map of the human genome. This work has progressed ahead of schedule, and the data are being placed in the public domain.

Centres of Excellence for Drug Discovery
Both Glaxo Wellcome and SmithKline Beecham have experimented with a number of ways to manage drug discovery in order to optimise the progression of new medicines. During 2000, it was agreed that, for GlaxoSmithKline, a novel approach to the integration of late-stage discovery and early-stage development – the critical drug discovery phase – would be adopted. This approach is based on a sound understanding of the creative and entrepreneurial environment needed to enhance the scientific knowledge and expertise required to discover new drugs of proven value.

Six Centres of Excellence for Drug Discovery (CEDDs) have been created in GlaxoSmithKline, each focusing on specific disease areas, as summarised below:

 
   
Anti-bacterials & Host Defence, centred in Upper Providence (USA)
Cardiovascular, Cancer and Urogenital, centred in Upper Merion (USA)
Metabolic, Musculoskeletal & Viral Diseases, centred in Research Triangle Park (USA)
Neurology, centred in Harlow (UK)
Psychiatry, centred in Verona (Italy)
Respiratory, Inflammation and Respiratory Pathogens, centred in Stevenage (UK).
   
 

CEDDs have the autonomy to select new compounds from either internal or external sources. Each CEDD is responsible for selecting the optimal candidate from a series of similar chemical compounds and for ensuring this candidate is safe in animal models and can be developed from a technical perspective. Once this is achieved, the CEDDs are responsible for conducting the pre-clinical and early clinical work required to prove that the compound is safe and efficacious in patients – the proof-of-concept or provision-of-confidence decision point. Following a thorough senior review of the information generated, a decision is then made to progress the compound into late stage drug development where the necessary large-scale clinical trials are conducted to successfully register and commercialise the product.

New product development
To provide focus for the development and commercialisation process, which must proceed in unison, all the major functional components, Medical, Regulatory and Product Strategy, have been integrated into one management organisation. Late-stage product development in both Glaxo Wellcome and SmithKline Beecham was organised by therapeutic areas and eight such areas have been identified for GlaxoSmithKline:

 
   
Anti-microbials & Host Defence
Anti-virals
Cardiovascular & Urogenital
Metabolic & Musculoskeletal
Neurology & Gastro-intestinal
Oncology
Psychiatry
Respiratory & Inflammation.
   
 

Worldwide vaccines R&D is conducted by the Biologicals Division, located principally at Rixensart, Belgium. It is managed independently from pharmaceuticals development. However, essentially similar approaches to development are adopted for both vaccines and prescription medicines.

The eight pharmaceutical therapy areas and vaccines development are managed by cross-functional matrix teams responsible for maximising the worldwide development opportunities for each product. The teams work to ensure that there is alignment between regional marketing needs and the clinical and commercial information generated for a new product as it is developed. The teams also collaborate at an early stage with integrated technical development and manufacturing functions to ensure rapid, effective launch and delivery of the product.

By increasingly incorporating genetic research into clinical trials of new and innovative medicines, GlaxoSmithKline will enable healthcare providers to prescribe medicines more accurately based on a patient’s predicted response profile (in terms of both drug safety and efficacy). In addition, genetic research will enable a better understanding of the causes of common diseases. Many such diseases arise through complex interactions between a number of gene variants and environmental factors. Identifying the genes that predispose patients to a particular disease and understanding their role in disease progression will lead to the identification of new ways to intervene in these diseases. This understanding will also provide greater confidence that existing drug targets are relevant to the disease.

New product supply
The efficient delivery and rapid worldwide uptake of our new products are closely linked to their ease of manufacture. Such issues as scale-up and manufacturing technology are considered at an early stage of product development, so that the process of moving from small-scale production of experimental materials for early clinical studies through to large-scale industrial manufacturing for product supply can be fast and efficient. This is the responsibility of ‘New Product Supply’, a partnership between R&D preclinical staff and Global Manufacturing & Supply. The partnership ensures that the Development organisation delivers a product that has already been optimised in terms of large-scale commercial manufacturing.

Animals and research
For ethical, scientific and legal reasons, animal experimentation remains essential in the discovery and subsequent safety evaluation of new medicines. GlaxoSmithKline policy is to replace animal experiments where at all possible and use alternatives such as in vitro cell culture or computer modelling techniques. If animal experiments are unavoidable, our approach is to seek to reduce the number of animals used, through improved techniques and methodology. Examples of this approach include:

 
   
the use of transgenic animals bred with genetic changes that better model human disease
work to use non-invasive imaging to understand pathological processes and the effects of experimental drugs in far fewer animals than are required by traditional in vivo pharmacological methods
the development of more sensitive assay methodologies to reduce the number of animals required to assess the effects of novel drug candidates.
   
 

Additionally, every effort is made to minimise discomfort in those animals used for such studies.


Research and development – Consumer Healthcare

The principal centres for Consumer Healthcare research and development are in the UK and in the USA. Consumer Healthcare liaises closely with Pharmaceuticals to ensure that commercial opportunities in the OTC field are identified as quickly as possible. GlaxoSmithKline also pursues, whenever possible, opportunities to switch prescription products to OTC products.

   
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