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La Jolla Pharmaceutical Company Abstract Accepted for the American Society of Nephrology Kidney Week 2013

SAN DIEGO, CA--(Marketwired - Aug 6, 2013) - La Jolla Pharmaceutical Company ( OTCBB : LJPC ) (the "Company" or "La Jolla"), a leader in the development of therapeutics targeting significant unmet life-threatening diseases, today announced that an abstract with data from the Company's Phase 1 clinical trial on galectin-3 and its inverse correlation with kidney function has been selected for poster presentation at the annual meeting of the American Society of Nephrology ("ASN"). Galectin-3 is the target inhibited by GCS-100, the Company's product candidate currently in Phase 2 clinical testing.

"We are delighted that our abstract has been selected by ASN for presentation," said George Tidmarsh, MD, PhD, President and Chief Executive Officer of La Jolla. "More than 13,000 kidney professionals are expected to attend ASN this year, and it is well established as the world's premier nephrology meeting."

La Jolla's abstract, #4359, entitled "Galectin-3, a Biomarker of Cardiovascular Risk, Inversely Correlates with eGFR," will be presented in a Poster Session titled Pathobiology: Clinical/Diagnostic Renal Pathology and Lab Medicine - 1, on Thursday, November 7, 2013 from 10:00am to 12:00pm.

The ASN meeting will be held November 5-10 in Atlanta, Georgia.

About the American Society of Nephrology and Kidney Week

The American Society of Nephrology (ASN) leads the fight against kidney disease by educating health professionals, sharing new knowledge, advancing research, and advocating the highest quality care for patients. Kidney Week is the world's premier nephrology meeting, providing participants exciting and challenging opportunities to exchange knowledge, learn the latest scientific and medical advances, and listen to engaging and provocative discussions with leading experts in the field.

About GCS-100

GCS-100 is a complex polysaccharide derived from pectin that binds to, and blocks the activity of, galectin-3, a type of galectin. Over-expression of galectin-3 has been implicated in a number of human diseases, including chronic organ failure and cancer. This makes modulation of the activity of galectin-3 an attractive target for therapy in these diseases.

About La Jolla Pharmaceutical Company

La Jolla Pharmaceutical Company is a biopharmaceutical company focused on the discovery, development and commercialization of innovative therapeutics for chronic organ failure and cancer. GCS-100, the Company's lead product candidate, is a first-in-class inhibitor of galectin-3, a novel molecular target implicated in chronic organ failure and cancer. LJPC-501 is a product candidate for the treatment of hepatorenal syndrome. For more information on the Company please visit http://www.ljpc.com.

Forward Looking Statement Safe Harbor

This document contains forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements relate to future events or our future results of operations. These statements are only predictions and involve known and unknown risks, uncertainties and other factors, which may cause actual results to be materially different from these forward-looking statements. The Company cautions readers not to place undue reliance on any such forward-looking statements, which speak only as of the date they were made. Certain of these risks, uncertainties, and other factors are described in greater detail in the Company's filings with the U.S. Securities and Exchange Commission ("SEC"), all of which are available free of charge on the SEC's web site http://www.sec.gov. These risks include, but are not limited to, risks relating to the development of GCS-100 and LJPC-501, the success and timing of future preclinical and clinical studies of these compounds, and potential indications for which GCS-100 and LJPC-501 may be developed. Subsequent written and oral forward-looking statements attributable to the Company or to persons acting on its behalf are expressly qualified in their entirety by the cautionary statements set forth in the Company's reports filed with the SEC. The Company expressly disclaims any intent to update any forward-looking statements.