In Re Regulus Therapeutics Inc. Securities Litigation

District Court, S.D. California·Decided September 5, 2019·No. 3:17-cv-00182·Unknown

Opinion

IN RE REGULUS Case No.: 3:17-cv-0182-BTM-RBB THERAPEUTICS INC. SECURITIES LITIGATION ORDER GRANTING

DISMISS AND GRANTING PLAINTIFFS LEAVE TO AMEND [ECF No. 22]

This is a putative securities class action filed on behalf of all purchasers of common shares of Regulus Therapeutics, Inc. (“Regulus”) between February 17, 2016 and June 12, 2017, inclusive (the “Class Period”). Plaintiffs allege that Defendants Regulus, Joseph P. Hagan, Paul C. Grint, M.D., and Michael Huang, M.D.1 made misleading statements regarding a pharmaceutical product being

1 Defendant Grint was Regulus’s Chief Executive Officer (“CEO”) from June 1, 2015 through his resignation on May 4, 2017. (ECF No. 19, ¶ 17.) Defendant developed by Regulus that artificially inflated its common stock prices during the Class Period. Based thereon, Plaintiffs assert claims for violation of Section 10(b) of the Securities Exchange Act, 15 U.S.C. § 78j(b), Rule 10b-5, 17 C.F.R. § 240.10b-5, and Section 20(a) of the Securities Exchange Act, 15 U.S.C. § 78t(a). (ECF No. 19.) Defendants move to dismiss Plaintiffs’ Consolidated Complaint under Federal Rule of Civil Procedure 12(b)(6). (ECF No. 22.) Regulus is a biopharmaceutical company that was developing a drug (“RG- 101”) to treat the hepatitis C virus (“HCV”). (ECF No. 19, ¶¶ 2, 27-28.) As part of the process of seeking approval from the United States Food and Drug Administration (“FDA”) to market and sell RG-101 to the public, Regulus was required to submit an investigational new drug application (“IND”) to obtain approval to test RG-101 on human subjects (i.e., to engage in “clinical” studies). See 21 C.F.R. §§ 312.20, 312.40. Generally, an IND must contain, inter alia, “[a] summary of the pharmacological and toxicological effects of the drug in animals, and to the extent known, in humans.”2 21 C.F.R. § 312.23(a)(5)(ii). In late 2015 and early 2016, Regulus initiated its first clinical trials. (ECF No. 19, ¶¶ 3-4.) On February 17, 2016, Regulus issued a press release in which it announced interim results from one of the clinical trials. (Id. ¶ 56.) Notably, the / / / / / /

appointment as CEO on May 4, 2017. (Id. ¶ 18.) Defendant Huang was Regulus’s Vice President of Clinical Development during the Class Period. (Id. ¶ 19.) 2 The pharmacological and toxicological effects of the drug under investigation are often gleaned from initial non-human studies conducted in laboratories and/or utilizing animals, referred to as “preclinical” or “nonclinical” studies. (See ECF No. press release included a statement that “[t]o date, RG-101 has been generally well tolerated with the majority of adverse events considered mild or moderate, and with no study discontinuations.”3 (Id. ¶¶ 56-57; see also id. ¶ 64.) In a conference call discussing the interim results held that same day, however, Defendants disclosed two serious adverse events (each, an “SAE”) experienced during the study and that an independent investigator had determined that one of the SAEs was “possibly” related to RG-101.4 (Id. ¶¶ 58, 61; ECF No. 22-4, at 7, 11.) Nevertheless, Defendant Huang downplayed the importance of these SAEs during the call, noting that they “occurred several weeks after dosing” and in a patient population suffering from “chronic hepatitis C [and] other medical issues.” Defendant Grint did the same, stating that the SAEs were “not concerning” to Defendants because the test subjects had HCV and thus “[t]here’s multiple other comorbidities as you follow a set of patients like this over a prolonged period of time, [such that] you are going to get serious adverse events reported by definition.” (ECF No. 19, ¶ 61; ECF No. 22-4, at 11, 14.) Defendant Grint repeated 3 Regulus reiterated similar statements in subsequent press releases and regulatory filings. (See ECF No. 19, ¶ 57 (February 17, 2016 Form 8-K filing), ¶ 64 “February 22, 2016 press release and Form 8-K filing), ¶ 70 (February 23, 2016 Form 10-K filing), ¶ 74 (April 15, 2016 press release), ¶ 77 (April 15, 2016 conference call), ¶ 81 (May 2, 2016 press release), ¶ 84 (May 2, 2016 earnings call), ¶ 88 (May 2, 2016 Form 10-Q filing), § 112 (November 1, 2016 Form 10-Q filing), ¶ 128 (March 2, 2017 Form 10-K filing). 4 An adverse event is “serious” if “it results in . . . [d]eath, a life-threatening adverse event, inpatient hospitalization or prolongation of existing hospitalization, a persistent or significant incapacity or substantial disruption of the ability to conduct normal life functions, or a congenital anomaly/birth defect. Important medical events that may not result in death, be life-threatening, or require hospitalization may be considered serious when, based upon appropriate medical judgment, they may jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the outcomes listed in this definition.” 21 C.F.R. § similar messaging in an earnings call held on February 22, 2016. (ECF No. 19, ¶ 67 (“[W]e’re certainly not worried about the safety profile of RG-101 or in fact the reports SAEs. . . . Just to remind you, these are patients that have chronic hepatitis C, they have multiple other co-morbid conditions, and we’re following them for very prolonged periods of time, and we’d expect to see other things reported over a follow-up period.”).) On April 15, 2016, Regulus hosted a conference call to present additional interim results from the clinical trials, including further discussion of the two SAEs identified during the February 16 conference call. (Id. ¶ 77; see also ECF No. 22- 5 (April 15, 2016 conference call edited transcript).) During that call, Defendant Grint stated that while ”[i]nvestigators . . . determined that” the first SAE, a “transient episode of dyspnea,”5 was “not related to” RG-101, further investigation was ongoing to determine the cause of the second SAE, “an event of jaundice.”6 (ECF No. 19, ¶ 77-78; see also Doc. 22-6, at 16 (Regulus slide presentation accompanying conference call stated “Jaundice (Daklinza arm) – Possibly related to Study Drug[.] 56-year old male presented with jaundice, fatigue, abdominal pain, and nausea 21 days after completion of therapy. Clinical chemistry showed significantly elevated total and direct bilirubin with minimal changes in transaminases. Ultrasound indicated potential sludge/debris in biliary tract and 5 i.e., difficult or labored breathing. 6 “Jaundice occurs when there is too much bilirubin (a yellow pigment) in the blood – a condition called hyperbilirubinemia.” (ECF No. 19, ¶ 43.) “Bilirubin is formed when hemoglobin (the part of red blood cells that carries oxygen) is broken down as part of the normal process of recycling old or damaged red blood cells. Bilirubin is carried in the bloodstream to the liver, where it binds with bile. Bilirubin is then moved through the bile ducts into the digestive tract, so that it can be eliminated from the body. Most bilirubin is eliminated in stool, but a small amount is eliminated in urine. If bilirubin cannot be moved through the liver and bile ducts quickly enough, it builds up in the blood and is deposited in the skin. The result is gallbladder wall thickening. Additional medical history included diabetes (not well- controlled) and alcohol use. Work-up ongoing to determine etiology. Patient currently recovering and remains active in study with favorable virologic

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In Re Regulus Therapeutics Inc. Securities Litigation, (S.D. Cal. 2019).

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