Phase 3 Data Supporting Rayaldee As a Treatment for Secondary Hyperparathyroidism in Chronic Kidney Disease to be Presented at ENDO 2015 Conference

OPKO Health (Ireland)

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March 06, 2015 8:30am EST

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MIAMI--(BUSINESS WIRE)--

OPKO Health, Inc. (NYSE: OPK), today announced the presentation of

late-breaking clinical data in a poster at the 97th Annual Meeting of

the Endocrine Society (ENDO) on March 6th, 2015 in San Diego,

California, that will include twelve months data from OPKO’s phase 3

trials for Rayaldee™ as a treatment for secondary hyperparathyroidism

(SHPT) in patients with stage 3 or 4 chronic kidney disease (CKD) and

vitamin D insufficiency. The data to be presented include results for

429 patients completing up to twelve months of treatment. The data

support the conclusion that Rayaldee effectively controls SHPT through

the correction of vitamin D insufficiency in both stage 3 and 4 CKD.

OPKO’s poster presentation is entitled: LBF-036: “Modified-Release

Calcifediol Controls Elevated iPTH, Corrects 25(OH)D Levels and Reduces

Bone Markers in CKD Patients.”

Session details: Friday, March 6; Time: 1:00 – 3:00 PM

About Rayaldee ™

Rayaldee is a first-in-class oral vitamin D prohormone treatment being

developed for SHPT in patients with stage 3 or 4 CKD and vitamin D

insufficiency. It has a proprietary modified-release formulation

designed to gradually and reliably raise serum total 25-hydroxyvitamin D

(prohormone) concentrations to targeted levels (at least 30 ng/mL) while

avoiding upregulation of CYP24, a cytochrome P-450 enzyme that reduces

the parathyroid hormone (PTH)-lowering potency of current vitamin D

supplements. Activation of calcifediol, the active ingredient in

Rayaldee, by the kidney is tightly regulated, preventing excessive

elevation of serum calcium and related side effects which limit the

value of current vitamin D hormone therapies by promoting vascular and

renal calcification. Rayaldee is expected to address the approximately 8

million patients in the U.S., and many more elsewhere, with stage 3 or 4

CKD, SHPT and vitamin D insufficiency.

About Chronic Kidney Disease

CKD is a condition characterized by a progressive decline in kidney

function. The kidney is normally responsible for excreting waste and

excess water from the body, and for regulating various hormones. CKD is

classified in five different stages — mild (stage 1) to severe (stage 5)

disease — as measured by the kidney's glomerular filtration rate.

According to the National Kidney Foundation, CKD afflicts over 26

million people in the U.S., including more than 20 million patients with

moderate (stages 3 or 4) and severe (stage 5) forms of CKD. In stage 5

CKD, kidney function is minimal to absent and patients require regular

dialysis or a kidney transplant for survival.

About Vitamin D Insufficiency

Vitamin D insufficiency is a condition in which the body has low vitamin

D stores, characterized by inadequate blood levels of vitamin D

prohormone, known as 25-hydroxyvitamin D. An estimated 70-90% of CKD

patients have vitamin D insufficiency, which can lead to SHPT and

resultant debilitating bone diseases. Vitamin D insufficiency has been

associated with increased mortality in CKD.

About Secondary Hyperparathyroidism (SHPT)

SHPT is a condition commonly associated with CKD in which the

parathyroid glands secrete excessive amounts of PTH. SHPT arises as a

result of vitamin D insufficiency or impaired kidney function that

prevents sufficient production of vitamin D hormone to properly regulate

calcium and phosphorus metabolism, and PTH secretion. Prolonged

elevation of blood PTH causes excessive calcium and phosphorus to be

released from bone, leading to elevated serum calcium and phosphorus,

softening of the bones (osteomalacia) and calcification of vascular and

renal tissues. SHPT affects 40-60% of patients with moderate CKD and

approximately 90% of patients with severe CKD. Vitamin D therapy for

SHPT is associated with reduced mortality in CKD patients.

About OPKO

OPKO is a multinational biopharmaceutical and diagnostics company that

seeks to establish industry leading positions in large, rapidly growing

markets by leveraging its discovery, development and commercialization

expertise and novel and proprietary technologies. For more information,

visit http://www.opko.com.

This press release contains "forward-looking statements," as that

term is defined under the Private Securities Litigation Reform Act of

1995 (PSLRA), regarding product development efforts and other

non-historical facts about our expectations, beliefs or intentions

regarding our business, technologies and products, financial condition,

strategies or prospects, including statements regarding our ability to

successfully launch and commercialize proprietary renal disease

products, expectations about Rayaldee, that Rayaldee will effectively

control secondary hyperparathyroidism in patients with stage 3 or 4

chronic kidney disease by correcting vitamin D insufficiency, whether

Rayaldee is appropriate for patients with minimal functioning kidney

mass and its efficacy during longer term administration, whether

Rayaldee will be highly effective in correcting vitamin D insufficiency,

allowing more reliable treatment of patients, whether it is the solution

to secondary hyperparathyroidism associated with vitamin D insufficiency

for the 20 million pre-dialysis CKD patients in the U.S. and elsewhere,

market potential for Rayaldee, that it will address the approximately 8

million CKD stage 3 and 4 patients in the U.S. and many more elsewhere,

with SHPT and vitamin D insufficiency, that Rayaldee will treat vitamin

D insufficiency and gradually correct elevated PTH, without safety

concerns, and that we will be able to successfully develop, obtain

approval for and launch sales of Rayaldee. Many factors could cause our

actual activities or results to differ materially from the activities

and results anticipated in forward-looking statements. These factors

include those described in our filings with the Securities and Exchange

Commission, as well as risks inherent in funding, developing and

obtaining regulatory approvals of new, commercially-viable and

competitive products and treatments, including the risks that the phase

3 clinical trials for Rayaldee may not generate data that would support

the approval or marketing of this product for the indications being

studied, that others may develop products which are superior to

Rayaldee, and that Rayaldee may not have advantages or prove to be

superior over presently marketed products, including the currently used

high monthly doses of prescription vitamin D 2 ,

activated vitamin D hormone and over-the-counter vitamin D supplements.

In addition, forward-looking statements may also be adversely affected

by general market factors, competitive product development, product

availability, federal and state regulations and legislation, the

regulatory process for new products and indications, manufacturing

issues that may arise, patent positions and litigation, among other

factors. The forward-looking statements contained in this press release

speak only as of the date the statements were made and we do not

undertake any obligation to update forward-looking statements. We intend

that all forward-looking statements be subject to the safe-harbor

provisions of the PSLRA.

OPKO Health, Inc.

Steven D. Rubin, 305-575-4100

Source: OPKO Health, Inc.

Released March 6, 2015

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