Advanced Cell Technology, a Los Angeles, CA-based stem cell company with research operations in Worcester, MA, announced on Thursday that it’s been able to derive five stem cell lines from human embryos without destroying the embryos. The company’s approach (OTC BB: [[ticker:ACTC]]) was published in the new edition of the journal Cell Stem Cells, published by Cell Press. Scientists in Japan and at the Harvard Stem Cell Institute recently used a different technique—starting with adult cells rather than embryonic ones—to produce similar cell lines.