Item 7.01. Regulation FD Disclosure.
On June 23, 2024, Scholar Rock Holding Corporation (the “Company”) presented new data from its preclinical study of SRK-439 in combination with GLP-1 receptor agonist (“GLP1-RA”) in an oral presentation during the American Diabetes Association (“ADA”) 84th Scientific Sessions.
A copy of the press release relating to the ADA presentation is attached hereto as Exhibit 99.1 and a copy of the ADA presentation slides are attached hereto as Exhibit 99.2.
The information in this report furnished pursuant to Item 7.01 and Exhibits 99.1 and 99.2 shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, regardless of the general incorporation language of such filing, except as shall be expressly set forth by specific reference in such filing. It may only be incorporated by reference in another filing under the Exchange Act or the Securities Act of 1933, as amended, if such subsequent filing specifically references the information furnished pursuant to Item 7.01 and Exhibits 99.1 and 99.2 of this report.
Item 8.01. Other Events.
On June 23, 2024, the Company presented new data from its preclinical study of SRK-439 in combination with GLP-1RAs. The preclinical study tested a murine equivalent of SRK-439 in a diet-induced obesity (“DIO”) mouse model. Mice were given either a high-fat diet plus semaglutide (0.04 mg/kg, daily) and an IgG control antibody (weekly, 10 mg/kg), or a high-fat diet plus semaglutide (0.04 mg/kg, daily) in combination with weekly injections of SRK-439 (10 mg/kg). Following four weeks of treatment, semaglutide was withdrawn from both treatment groups and mice remained on either the IgG control antibody weekly or on SRK-439. Treatment continued for another four weeks, for a total of eight weeks in the study. Quantitative nuclear magnetic resonance (“qNMR”) was used to analyze change in lean mass at two weeks and again at four weeks of semaglutide treatment, and every two weeks after that until the end of the subsequent four-week withdrawal period.
The group that received SRK-439 maintained more favorable body composition than the group receiving IgG antibody. Key findings supporting the potential for SRK-439 in advancing healthier weight management include:
| ● | Administration with SRK-439 attenuated the loss of lean mass during semaglutide treatment and significantly increased lean mass after semaglutide discontinuation as compared to IgG control; |
| ● | SRK-439 administration also attenuated the fat mass rebound after semaglutide discontinuation as compared to that in IgG control + semaglutide mice; and |
| ● | Body composition, i.e. proportion of lean mass or fat mass to total body weight, was more favorable in mice receiving SRK-439 as compared to IgG control: Mice administered SRK-439 had higher relative lean mass (65.8%) and lower relative fat mass (18.0%) at the end of the withdrawal period compared to IgG control (57.1% lean mass and 28.7% fat mass). |
Shown below are results for body composition at baseline (6 days before semaglutide treatment), the end of semaglutide treatment (at 4 weeks), and at the end of the semaglutide withdrawal period (at 8 weeks):
Endpoint (units) | IgG control + semaglutide | SRK-439 + semaglutide | P value |
Absolute lean mass (g) at baseline | 24.8 | 25.5 | n.s. |
Absolute lean mass (g) at 4 weeks | 22.3 | 26.4 | P<0.001 |
Absolute lean mass (g) at 8 weeks | 25.1 | 29.4 | P<0.0001 |
Absolute fat mass (g) at baseline | 11.8 | 10.3 | n.s. |
Absolute fat mass (g) at 4 weeks | 5.9 | 3.8 | n.s. |
Absolute fat mass (g) at 8 weeks | 12.7 | 8.3 | n.s. |
Relative lean mass (%) at 8 weeks | 57.1% | 65.8% | P<0.001 |
Relative fat mass (%) at 8 weeks | 28.7% | 18.0% | P<0.01 |
