Three-year Follow-up Data Confirm Safety And Survival Benefit In Chinese Liver Failure Patients Trea

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14th October 2010, 03:41pm - Views: 696

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Three-Year Follow-Up Data Confirm Safety and Survival Benefit in Chinese Liver Failure Patients Treated

With ELAD(R) Bioartificial Liver

SAN DIEGO, Oct. 14 /PRNewswire-AsiaNet/ --

Poster presentation scheduled at AASLD November 2nd

Vital Therapies, Inc., (VTI) today announced that a poster is being presented at the American Association for the

Study of Liver Diseases (AASLD) meeting in Boston on Tuesday, November 2nd. It confirms that previously

reported findings of improved transplant free survival (TFS) in Chinese subjects with acute-on-chronic liver failure

(ACLF) treated with the ELAD(R) bioartificial liver support system are maintained for up to three years.

The poster is titled "3-year follow-up of acute-on-chronic liver failure (ACLF) subjects in randomized, controlled,

multicenter trial of ELAD(R) bioartificial liver support system in 49 Chinese subjects reveals significant transplant-

free survival (TFS) benefit." It is being presented by Dr. Michael Millis, Professor of Surgery, University of Chicago,

and is coauthored by Drs. Zhongping Duan and Jing Zhang, Beijing You'an Hospital, and Shaojie Xin and Shaoli

You, 302 Military Hospital, Beijing.

Previously, it was reported that 84-day follow-up of ACLF subjects enrolled at two liver treatment centers in China

showed statistically significant improvements in TFS for ELAD treatment compared with standard of care (SOC). At

least three years following enrollment, survivors were consented and underwent a cancer screen and physical

exam in accord with a questionnaire.

Of 49 subjects enrolled, 84-day TFS was 21/32 (65.6%) in the ELAD group vs. 7/17 (41.1%) in controls. Three-year

TFS was 14/32 (43.8%) in the ELAD group vs. 3/12 (25%) in controls. Of 84-day survivors, 2/21 (9.5%) ELAD and

2/7 (28.6%) controls died, 1/21 (4.8%) ELAD and 0/7 controls were transplanted and 4/21 (19.0%) ELAD and 2/7

(28.6%) controls were lost to follow-up. Survival analysis reveals a statistically significant improvement in TFS

(p=0.045, log-rank analysis) for the ELAD treated subjects compared with SOC. Median survival of controls was 37

days, whereas median survival of ELAD treated subjects was at least 3 years. There was no evidence of tumor

development in either group.

Dr. Millis commented, "This is the first time that a long term survival benefit has been demonstrated in subjects who

recovered following treatment with ELAD. It is highly encouraging to note that those subjects that survive in the

short term are able to go on to extended survival without any apparent increase in mortality or morbidity compared

with subjects administered standard of care."

Dr. Duan, who served as a principal investigator for the study, commented, "China has about 95 million HBV

carriers and chronic hepatitis B patients, and 38 million hepatitis C patients. It is estimated that 0.1%-0.5%

of these patients will experience severe hepatitis due to acute hepatocellular necrosis or hypofunction, which

results in hepatic insufficiency and hepatic failure. Mortality from this condition still remains around 50%-70% even

with comprehensive internal medicine treatment, leading to as many as 400,000 deaths per year in China from

acute liver failure. When approved for commercial sale in China, ELAD will be the first bioartificial liver support

system proven to improve survival in this population."

In order to confirm these findings from China, VTI is conducting the SILVER (Stabilization In LiVER Failure) trial in

the United States, Europe and Saudi Arabia which has achieved 50% of its targeted enrollment. Should this study

yield positive findings, these results, along with data from other studies, will form the basis of regulatory filings for

future marketing authorization.

About ELAD and the SILVER Trial

The SILVER protocol enrolls subjects with chronic liver disease who have been hospitalized as a result of an event,

such as an infection or an episode of bleeding, which has caused deterioration of their liver function (acute-on-

chronic liver failure, ACLF). The trial is designed to explore whether the use of ELAD in this setting can prevent

continued deterioration of liver function, called progression, and thus improve survival. The trial design uses a well-

established measure of liver function called the MELD score to define the status of liver function. Treatment with

ELAD, along with standard of care, is compared with standard of care alone. The time to either death or

Misc Miscellaneous Vital Therapies, Inc. 3 image

deterioration of liver function by a pre-specified amount is measured. It is postulated that the use of ELAD may

extend the time to progression and improve survival in this rapidly progressing patient population.

ELAD is a biologic liver support system using a proprietary line of allogeneic human liver cells refined by several

leading cell experts. The cells are stable, immortal, can be grown in unlimited quantities and retain their hepatocyte

(liver cell) characteristics. About one pound of cells is used for each treatment. The cells are grown in specially

designed cartridges at VTI's cell culture facility and used to treat the patient for up to ten days.

About Vital Therapies, Inc.

Vital Therapies, Inc. (VTI) is based in San Diego, California, with a wholly owned subsidiary in Beijing, China. VTI is

developing the first human liver cell-based Extracorporeal Liver Assist System (ELAD). ELAD could provide support

for patients with severe liver failure by processing toxins and also synthesizing proteins and metabolites that are

key products of normal human liver function. ELAD is in investigational clinical trials and VTI completed a pivotal

trial and filed for market approval in China in September 2007. For additional information visit or contact Terry Winters, PhD, CEO, Vital Therapies at +1 858 673 6840.

ELAD is a trademark of Vital Therapies, Inc.


SOURCE: Vital Therapies, Inc.

CONTACT: Terry Winters, PhD

CEO of Vital Therapies


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