NAVIGATOR shows valsartan delayed progression to type 2 diabetes in at-risk cardiovascular patients with impaired glucose tolerance
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* NAVIGATOR study involved more than 9,000 patients, making it one of the
largest and longest global trials to date in pre-diabetic patients
* Valsartan-based regimen reduced risk of developing new-onset diabetes by
14%, but did not reduce risk of cardiovascular events
* Nateglinide-based regimen did not reduce incidence of new-onset diabetes or
of cardiovascular events
Basel, March 14, 2010 - Results from a landmark study involving more than 9,000
people showed that the high blood pressure medicine valsartan delayed
progression to type 2 diabetes in patients with cardiovascular disease or risk
factors and impaired glucose tolerance (IGT), a common pre-diabetic condition.
Primary data from the NAVIGATOR (Nateglinide And Valsartan in Impaired Glucose
Tolerance Outcomes Research) trial, initiated in 2001, were presented today at
the American College of Cardiology Annual Meeting in Atlanta, USA[1] and
simultaneously published online in the New England Journal of Medicine[2],[3].
The study assessed whether valsartan or the oral anti-diabetic agent nateglinide
could delay progression to diabetes or reduce the incidence of cardiovascular
events in people with IGT and cardiovascular disease or risk factors.
"Obesity and hypertension are global health epidemics, and many of these
patients have problems with impaired glucose tolerance. From numerous studies,
we know that patients with IGT have an increased risk for type 2 diabetes and
cardiovascular disease," said Dr. Robert Califf, Vice Chancellor for Clinical
Research at Duke University School of Medicine and Director of the Duke
Translational Medicine Institute, Durham, NC, USA. "It is critical that we
continue to search for pharmacologic interventions that may reduce the incidence
of diabetes and cardiovascular disease while emphasizing to our patients that
weight loss, as little as 5%, may improve outcomes."
Patients in the study with IGT and cardiovascular disease or other risk factors,
who received valsartan for at least five years in addition to background therapy
and a study-specific lifestyle-modification program, achieved a statistically
significant 14% reduction in their risk of developing new-onset diabetes
compared to those in the non-valsartan group[1],[2].
Valsartan therapy did not show a reduction in the risk of cardiovascular events
in this well-managed group of patients[1],[2], while nateglinide-based therapy
did not show a reduction in the incidence of new-onset diabetes or of
cardiovascular events in this study population[1],[3].
Trevor Mundel, M.D., Global Head of Development at Novartis Pharma AG said: "As
a global leader in cardiovascular and metabolic health, Novartis is committed to
advancing public health and policy pertaining to diabetes. We are very pleased
with the findings of the NAVIGATOR study as they add to the large body of
scientific information on valsartan."
The worldwide prevalence of diabetes is expected to increase by 50% (i.e. from
285 to 439 million patients) by 2030 [4]. IGT is a defined stage in the
development of diabetes[5], and it has been suggested that up to 70% of people
with impaired fasting glucose (IFG) and IGT are likely to develop type 2
diabetes over their lifetime[6]. Current guidance from the American Diabetes
Association, American College of Endocrinology/American Association of Clinical
Endocrinologists and the World Health Organization recommends a variety of
interventions for the management of pre-diabetes, based on lifestyle
modification[7],[8],[9].
"Lifestyle modification remains the primary intervention for the prevention of
diabetes. The NAVIGATOR study shows that valsartan, when added to a
lifestyle-modification program, can delay progression to diabetes in people who
are at high cardiovascular risk and have impaired glucose tolerance," said Dr
Rury Holman, Professor of Diabetic Medicine at the Oxford Centre for Diabetes,
Endocrinology & Metabolism, University of Oxford, United Kingdom.
Novartis plans to discuss the results of this study with the U.S. Food and Drug
Administration with a view to applying for a label change for valsartan.
Valsartan is currently indicated for the treatment of high blood pressure for
the treatment of heart failure, and reducing the risk of cardiovascular
mortality in patients who have suffered a heart attack (myocardial infarction).
Nateglinide is indicated as an adjunct to diet and exercise to improve glycemic
control in adults with type 2 diabetes. Neither valsartan nor nateglinide is
currently indicated for the treatment of patients with IGT.
About the study
NAVIGATOR was a prospective, multinational, randomized, double-blind,
placebo-controlled, two-by-two factorial design trial being conducted in 39
countries at nearly 800 sites. The 9,306 patients enrolled in the trial had IGT
and were either older than age 50 with diagnosed cardiovascular disease or older
than age 55 with at least one risk factor for cardiovascular disease, such as
high blood pressure, family history of heart disease, high cholesterol or
smoking. In addition to background therapy and a study-specific lifestyle
modification program, patients were randomized to receive either valsartan,
nateglinide, valsartan and nateglinide together, or placebo[2],[3]
NAVIGATOR had three co-primary endpoints. The first endpoint was confirmed
progression to overt diabetes, defined according to standard WHO/ADA criteria.
The second ('core' cardiovascular) endpoint was a composite of time to first
occurrence of cardiovascular death, non-fatal myocardial infarction, non-fatal
stroke or hospitalization for heart failure. The third ('extended'
cardiovascular) endpoint consisted of the core cardiovascular endpoint plus
revascularization and hospitalization for unstable angina. The median follow-up
time (for vital status) was 6.5 years[2].
The primary NAVIGATOR results for valsartan were as follows:[1],[2]
* Statistically significant reduction in the risk of progression to diabetes
of 14% (HR 0.86, 95% CI 0.80-0.92; p<0.001) compared to non-valsartan
treatment
* No statistically significant reduction of the 'core' (HR 0.99, 95% CI
0.86-1.14; p=0.42) and 'extended' (HR 0.96, 95% CI 0.86-1.07; p=0.22) CV
endpoints
The primary results for nateglinide were as follows:[1],[3]
* No reduction compared to non-nateglinide treatment in terms of progression
to diabetes (HR 1.07, 95% CI 1.00-1.15, p=0.98)
* No statistically significant reductions of the 'core' (HR 0.94, 95% CI
0.82-1.09, p=0.22) and 'extended' (HR 0.93, 95% CI 0.83-1.03, p=0.08) CV
endpoints
Valsartan was dosed up to 160 mg once daily. During the course of the study,
556 participants (12%) in the valsartan group and 531 (11%) in the non-valsartan
group discontinued the study drug due to an adverse event. The most common
adverse event seen in the valsartan group was hypotension. Nateglinide was dosed
up to 60 mg three times daily. During the course of the study, 520 participants
(11%) in the nateglinide group and 485 (10%) in the non-nateglinide group
discontinued study drug due to an adverse event. The most common adverse events
seen in the nateglinide group were hypotension-related events and
hypoglycemia[2],[3]
Disclaimer
The foregoing release contains forward-looking statements that can be identified
by terminology such as "risk," "continue to search," "may," "committed,"
"expected," "likely," "can," "plans," or similar expressions, or by express or
implied discussions regarding potential new indications or labeling for
valsartan or regarding potential future revenues from valsartan as a result. 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 valsartan to be materially different from any future
results, performance or achievements expressed or implied by such statements.
There can be no guarantee that valsartan will be submitted or approved for any
additional indications or labeling in any market. Nor can there be any guarantee
that any such additional indications or labeling will result in valsartan
achieving any particular levels of revenue in the future. In particular,
management's expectations regarding valsartan could be affected by, among other
things, unexpected regulatory actions or delays or government regulation
generally; the company's ability to obtain or maintain patent or other
proprietary intellectual property protection; competition in general;
government, industry and general public pricing pressures; unexpected clinical
trial results, including unexpected new clinical data and unexpected additional
analysis of existing clinical data; 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
Novartis 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 2009, the Group's continuing operations achieved net sales of
USD 44.3 billion, while approximately USD 7.5 billion was invested in R&D
activities throughout the Group. Headquartered in Basel, Switzerland, Novartis
Group companies employ approximately 100,000 full-time-equivalent associates and
operate in more than 140 countries around the world. For more information,
please visit http://www.novartis.com
References
[1] Califf RM. Late-breaking presentation at the ACC Congress 2010; Abstract No:
3010-12.
[2] McMurray J, et al. N Engl J Med 2010; in press.
[3] Holman RR, et al. N Engl J Med 2010; in press.
[4] International Diabetes Federation. Diabetes Atlas. 4th ed. Available at:
www.diabetesatlas.org/content/diabetes-and-impaired-glucose-tolerance
Last accessed 5 Mar 2010.
[5] International Expert Committee. Diabetes Care 2003;26:3160-7.
[6] Nathan DM, et al. Diabetes Care 2007;30(3):753-9.
[7] American Diabetes Association. Diabetes Care 2010;33(Suppl 1):S11-61.
[8] American Association of Clinical Endocrinologists. Endocr Pract
2008;14(7):933-46.
[9] World Health Organization. Fact sheet No: 312 - Diabetes. Available at:
www.who.int/mediacentre/factsheets/fs312/en/
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