Aursos, a Kalamazoo, MI, company that uses a protein found in black bears to try to prevent bone loss in people who suffer from osteoporosis, has raised $40,000 toward a $230,000 round of debt, rights and securities, according to VentureWire. In March, VentureWire reported the company raised $60,000 toward a $740,000 equity round. Previously, the company has received $200,000 from the Michigan Pre-Seed Capital Fund. The company is aiming to raise $15 million in Series A, according to VentureWire. Aursos is developing parathyroid hormone (PTH) treatments for osteoporosis. Found in black bears, PTH allows the animals to remain immobile during long periods of hibernation while still retaining bone strength. Investors in the company also include Ann Arbor Spark, Apjohn Ventures Fund, and Michigan Economic Development Corp.