Peigen Huang, MD
Instructor in Radiation Oncology
Harvard Medical School
Edwin L. Steele Laboratory for Tumor Biology
Spontaneous Tumors and Their Isograft Models: Histopathology and Pathophysiology Studies
As part of the Edwin L. Steele Laboratory for Tumor Biology, research at the Huang Lab focuses on the development of spontaneous tumors in mice and on how the age, genetic background and immune status of the mice-as well as the presence or absence of specific genes-affect the histopathological characteristics of the tumors. We study the incidence of spontaneous tumors and their pathological pattern in the natural setting of aged mice, which are kept alive for nearly their full normal life span. The animals are raised within a gnotobiotic colony that is free of life shortening intercurrent infectious diseases. We have found a high incidence of subcutaneous sarcoma in our aging C3Hf/Sed female mice. In our aging, retired FVB/N breeder mice, tumors are most commonly found in the lungs. Our results show that the incidence of spontaneous tumors and their morphological changes are markedly strain dependent, and are age-associated.
Recently, we are documenting the development, growth and histopathological characteristics of spontaneous tumors in the GFP transgenic mice with FVB background (such as VEGF-GFP/FVB, and Tie2-GFP/FVB mice). Our goal is to test the hypotheses that:
We are also interested in developing novel tumor lines that are derived from the spontaneous tumors found in our laboratory. These tumor lines are used to study tumor pathophysiology in specific strains of transgenic mice derived from the same genetic background as the spontaneous tumors. One of our tumor lines, Os-P0107, is derived from a spontaneous osteosarcoma in a VEGF-GFP transgenic mouse; each of the cells in an Os-P0107 tumor expresses green fluorescent protein (GFP), which makes them easy to locate and track with intravital microscopy.
Another tumor line, LA-P0297, is a lung adenocarcinoma with a high incidence of distant lung metastases. This line, which is ideal for the study of metastasis, is derived from a spontaneous lung tumor in a FVB/N mouse. For pre-clinical studies of antiangiogenesis therapy, we have used spontaneous autochthonous tumors and their isografts, implanted in aged C3Hf/Sed mice, to more accurately simulate the clinical conditions that affect many human cancer patients.