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Home > Press > Advanced Magnetics Announces Positive Results from Two Additional Phase III Studies of Ferumoxytol as an Intravenous Iron Replacement Therapeutic

Abstract:
Advanced Magnetics
(Nasdaq: AMAG) today announced positive results from two additional Phase
III clinical trials of ferumoxytol as an intravenous (IV) iron replacement
therapeutic that are being presented today at approximately 6:00 pm EDT as
posters at the National Kidney Foundation's Spring Clinical Meeting in
Orlando, Florida. These posters are available in the investor section on
the company's web site at http://www.advancedmagnetics.com .

Advanced Magnetics Announces Positive Results from Two Additional Phase III Studies of Ferumoxytol as an Intravenous Iron Replacement Therapeutic

CAMBRIDGE, MA | Posted on April 11th, 2007

The first poster, "Evaluation of the Efficacy and Safety of Ferumoxytol
as an Intravenous Iron Replacement Therapy in Chronic Kidney Disease (CKD)
Patients Not on Dialysis" shows results from 303 non-dialysis dependent CKD
patients who were randomized to receive either two 510 mg doses of
ferumoxytol within one week or 200 mg of oral iron daily for three weeks.
This Phase III study demonstrated a statistically significant achievement
of all primary and secondary endpoints. Additionally, all primary and
secondary endpoints were achieved with statistical significance in both
patients on erythropoiesis stimulating proteins (ESP) and those not on
ESPs. These new results are consistent with the results previously
presented at the American Society of Nephrology's Renal Week in San Diego,
CA in November 2006 from another study in non-dialysis dependent CKD
patients with an identical protocol.

The second poster, "Evaluation of the Safety of Intravenous Ferumoxytol
for Iron Replacement Therapy in Chronic Kidney Disease (CKD)" shows results
from a double-blind, placebo-controlled, crossover Phase III study which
enrolled a total of 750 patients, including both dialysis-dependent CKD
patients and non-dialysis dependent CKD patients, who received either one
510 mg dose of ferumoxytol or IV placebo (saline) at day zero and received
the other treatment at day seven. The primary safety analysis was the
descriptive comparison of adverse events (AEs) experienced during
ferumoxytol and placebo administration. Treatment related AEs occurred in
37 patients (5.2%) after ferumoxytol treatment and in 30 patients (4.2%)
after placebo treatment. Treatment related serious adverse events (SAEs),
as determined by the investigator, occurred in one patient (0.1%) after
ferumoxytol treatment and in one patient (0.1%) after placebo treatment.

"The data from these studies are very promising because they
demonstrate a statistically significant improvement in hemoglobin levels
for non-dialysis dependent CKD patients undergoing ferumoxytol therapy as
compared to oral iron therapy. In my opinion, the results from these two
new studies, in conjunction with previous clinical trials, support an
attractive profile for ferumoxytol," stated Allen Nissenson, MD, Professor
of Medicine and Director of the Dialysis Program at David Geffen School of
Medicine at UCLA and Chair of the Ferumoxytol Scientific Advisory Board.

"We are very pleased with the results that we are presenting today at
the National Kidney Foundation meeting," stated Brian J.G. Pereira, MD,
President and CEO of Advanced Magnetics. "We have now presented data from
three of the four studies in the pivotal program for ferumoxytol. These new
results are encouraging, and we remain on track to file our NDA for
ferumoxytol in the fourth calendar quarter of 2007."

Efficacy and Safety Study in Non-Dialysis Dependent CKD Poster

The first poster shows results from the second of two efficacy and
safety studies in non-dialysis dependent CKD patients (Protocol 62,745-7;
ClinicalTrials.gov identifier NCT00255437). Efficacy results in the intent
to treat (ITT) and efficacy evaluable populations were similar. Efficacy
results from the ITT analysis showed:

* For the primary endpoint, which is change in hemoglobin from baseline
at Day 35, patients receiving ferumoxytol had a significantly greater
mean increase in hemoglobin compared to patients receiving oral iron
(ferumoxytol 1.24 +/- 1.25 g/dl vs. oral iron 0.50 +/- 0.98 g/dl,
p<0.0001).

* Ferumoxytol was more likely to increase baseline hemoglobin by greater
than or equal to 1 g/dl compared to oral iron (52.9% of ferumoxytol
patients vs. 18.2% of oral iron patients, p<0.0001).

* Mean increase in serum ferritin from baseline was significantly
greater in the ferumoxytol group compared to the oral iron group
at Day 21 (ferumoxytol 416.0 +/- 249.0 ng/ml vs. oral iron
4.3 +/- 48.2 ng/ml, p<0.0001).

* Stratifying by ESP use, there was a significantly greater increase in
hemoglobin at Day 35 for ferumoxytol compared to oral iron in both
patients who were on ESPs and those who were not on ESPs.

* In patients on a stable ESP dose, mean hemoglobin increase at Day 35
was 1.66 +/- 1.38 g/dl for ferumoxytol compared to 0.82 +/- 1.28 g/dl
for oral iron (p=0.0024). In addition, 66.3% of patients treated with
ferumoxytol experienced an increase of +/- 1 g/dl in hemoglobin
compared to 35.3% of patients treated with oral iron (p=0.0017).

* Similarly, in patients not treated with ESPs, mean hemoglobin increase
at Day 35 was 0.93 +/- 1.05 g/dl for ferumoxytol compared to
0.25 +/- 0.56 g/dl for oral iron (p<0.0001). In addition, 43.1% of
patients treated with ferumoxytol alone experienced an increase of
greater than or equal to 1 g/dl in hemoglobin compared to 4.7% of
patients treated with oral iron alone (p<0.0001).

Ferumoxytol was well tolerated with repeated dosing (2 x 510 mg).
Adverse events occurred in 55.5% of ferumoxytol patients compared to 59.5%
of oral iron patients. Drug-related adverse events occurred in 21.4% of
ferumoxytol patients compared to 16.2% of oral iron patients. Serious
adverse events occurred in 7.7% of ferumoxytol patients compared to 13.5%
of oral iron patients. There were no drug-related SAEs in ferumoxytol
treated patients. There was one drug-related SAE in one oral iron treated
patient (1.4%); a case of severe gastritis which led to discontinuation of
the study drug.

Safety Study in CKD Poster

The second poster shows results from a double-blind,
placebo-controlled, crossover safety study in dialysis- dependent CKD and
non-dialysis dependent CKD patients (Protocol 62,745-8; ClinicalTrials.gov
identifier NCT00255450). Complete safety data was available for 360
patients randomized to the ferumoxytol to placebo sequence and for 362
patients randomized to the placebo to ferumoxytol sequence. For the
ferumoxytol to placebo sequence, 40.3% of patients had dialysis-dependent
CKD, and for the placebo to ferumoxytol sequence 43.6% of patients had
dialysis-dependent CKD. The results from this safety study showed:

* There were no meaningful mean changes in vital signs on laboratory
values from baseline for patients after either ferumoxytol or placebo
administration.

* AEs occurred in 21.3% of patients after ferumoxytol administration and
in 16.3% of patients after placebo administration. On a blinded
basis, these were deemed to be related to treatment by the
investigator in 5.2% of patients after ferumoxytol and in 4.2% of
patients after placebo.

* SAEs occurred in 2.9% of patients after ferumoxytol administration and
in 1.8% of patients after placebo administration. On a blinded basis,
these SAEs were deemed to be related to treatment by the investigator
in one patient (0.1%) after ferumoxytol and in one patient (0.1%)
after placebo.

* The single SAE attributed to the drug after ferumoxytol administration
occurred in an 85 year-old male, with non-dialysis dependent CKD,
hypertension, coronary artery disease, cerebrovascular disease and a
history of multiple drug allergies to ciprofloxacin, levofloxacin, and
percocet. The patient experienced an anaphylactoid reaction with
severe hypotension a few minutes after ferumoxytol administration, was
treated with subcutaneous epinephrine and recovered without sequelae.

* The single SAE attributed to the drug after placebo administration
occurred in an 81 year-old female, with non-dialysis dependent CKD,
hypertension, atrial fibrillation, oxygen-dependent chronic
obstructive pulmonary disease, hypothryroidism and gout. The patient
developed a petechial rash one day after placebo administration, was
withdrawn from the study and did not receive ferumoxytol.

The combined data from three of the four Phase III studies for which
results are now available represent a total of approximately 1,588
administrations of 510 mg of ferumoxytol in 1,151 patients (protocols
62,745- 6; 62,745-7; and 62,745-8). One of 1,151 patients (0.09%)
experienced a drug related SAE after ferumoxytol treatment compared to one
of 149 patients (0.67%) treated with oral iron and one of 716 patients
(0.14%) treated with IV saline (placebo).

Conference Call Information

The company will host a conference call at 4:30 pm EDT today to discuss
and answer questions regarding the data from the completed ferumoxytol
studies and the status of the ferumoxytol clinical development program.

To listen to this conference call via audio webcast, please visit the
Investors section of the Advanced Magnetics website at
http://www.advancedmagnetics.com. The web cast will also be available as a
replay starting approximately one hour after the call is finished through
July 11, 2007. Alternatively, to access the call via live telephone, please
dial (800) 909-5202. Internationally, the call may be accessed by dialing
(785) 830-7975. The confirmation code for this call is: 2603141

Replay information will be published by the company following this
call.

NOTE: THESE DIAL-IN NUMBERS ARE DIFFERENT THAN THE PREVIOUSLY ISSUED
NUMBERS.

####

About Advanced Magnetics
Advanced Magnetics, Inc. is a developer of superparamagnetic iron oxide
nanoparticles used in pharmaceutical products. As a leader in our field, we
are dedicated to the development and commercialization of our proprietary
nanoparticle technology for use in therapeutic iron compounds to treat
anemia, as well as novel imaging agents to aid in the diagnosis of cancer
and cardiovascular disease. For more information about Advanced Magnetics,
please visit our website at http://www.advancedmagnetics.com , the content
of which is not part of this press release.

About Ferumoxytol
Ferumoxytol, the company's key product candidate, is being developed
for use as an intravenous iron replacement therapeutic for the treatment of
iron deficiency anemia in chronic kidney disease. The company plans to file
a New Drug Application for marketing approval of ferumoxytol with the U.S.
Food and Drug Administration during the fourth calendar quarter of 2007.

Forward-looking Statement

This document contains forward-looking statements within the meaning of
the Private Securities Litigation Reform Act of 1995 and federal securities
laws. Any statements contained in this press release that do not describe
historical facts, including but not limited to, statements regarding the
promising nature of the ferumoxytol data presented in this press release,
the opinion that these results support an attractive profile for
ferumoxytol, the encouraging nature of these results and the timing of the
planned submission of the NDA for ferumoxytol in the fourth quarter of
calendar 2007 are forward- looking statements that involve risks and
uncertainties that could cause actual results to differ materially from
those discussed in such forward- looking statements. Such risks and
uncertainties include the following: (1) the possibility that we may not be
able to successfully complete the development of ferumoxytol, or may not be
able to complete the development in a timely or cost-effective manner, due
to deficiencies in the design or oversight by us of these trials, the
failure of our trials to demonstrate that ferumoxytol is safe and
efficacious, unexpected results from our clinical sites, inadequate
performance by third-party service providers, or any other factor causing
an increase in expenses, a delay and/or a negative effect on the results of
the clinical studies for ferumoxytol; (2) uncertainties surrounding our
ability to obtain regulatory approval for ferumoxytol from the FDA; (3) the
possibility that the results of past ferumoxytol studies may not be
replicated in future studies; (4) the fact that we have limited sales and
marketing expertise; (5) the possibility that we may not be able to raise
additional capital on terms and on a timeframe acceptable to us, if at all;
(6) uncertainties relating to our patents and proprietary rights; and (7)
other risks identified in our Securities and Exchange Commission filings.
We caution readers not to place undue reliance on any forward-looking
statements which speak only as of the date they are made. We disclaim any
obligation to publicly update or revise any such statements to reflect any
change in expectations or in events, conditions or circumstances on which
any such statements may be based, or that may affect the likelihood that
actual results will differ from those set forth in the forward-looking
statements.

For more information, please click here

Contacts:
Kristen Galfetti (investors)

(617) 498-3362

Lynn Kettleson (media)

(978) 463-7952

Copyright © PR Newswire Association LLC.

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