Cancer is fundamentally a genetic disease that causes problems globally and locally. Cancer is caused by a massive growth of cells undergoing accumulation of genetic alterations as well as disruption of DNA modification, resulting in deregulation of cell proliferation, differentiation, survival and apoptosis. Besides deregulation of cell proliferation, cancer has also ability to invade and metastasize to the distant site of the body. The research projects ongoing in our group aim to identify the molecular mechanisms and signaling processes underlying two types of cancers that are widely found in Thai population , cholangiocarcinoma and cervical cancers. Cholangiocarcinoma is known to be associated with liver flukes whereas cervical cancer is known to be caused by human papillomaviruses. The roles of these pathogens in interfering with human immune response are our special interests.