This invention relates to new immortalized human pre-adipose cell lines capable of differentiating into adipose cells and methods of obtaing the immortalized cells. In particular, the present invention pertains to immortalized pre-adipocyte cell lines derived from white adipose tissue and methods of producing the cell lines. The immortalized pre-adipocyte cells are capable of maturing into immortalized white adipose cells useful in developing drugs, food ingredients and supplements against obesity, diabetes and cardiovascular diseases.