Wei Q, Liu QZ, Tuo CW, Zang N, Yang B, Zhu XW, Wang MY. Establishment of orthotopic transplantation model of human primary rectal lymphoma in nude mice and investigation of its biologic characteristics.
Shijie Huaren Xiaohua Zazhi 2007;
15:1500-1504. [DOI:
10.11569/wcjd.v15.i13.1500]
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Abstract
AIM: To establish an orthotopic transplantation model of human primary rectal lymphoma in nude mice and investigate its biologic features.
METHODS: Histologically fresh lymphoma tissues from a case of primary rectal lymphoma during operation were transplanted into rectal mucosa of nude mice. Tumorgenecity, invasion, metastasis, morphology (light microscopy, electron microscopy and immunohistochemistry), karyotype analysis and DNA content of orthotopically transplanted tumors were studied.
RESULTS: According to the new WHO classification of malignant lymphoma, an orthotopic transplantation model of human primary rectal lymphoma (non-Hodgkin's, B cell, high malignancy) in nude mice (HRBL-0305) was successfully established. Immunohistochemistry showed that CD19, CD20, CD22 and CD45 were positive, but CD3 and CD7 were negative. The number of chromosome was between 56 and 69. DNA index (DI) was 1.57-1.61 (i.e. heteroploid). So far, HRBL-0305 has been passaged for 31 generations in nude mice. A total of 187 nude mice were used for transplantation. Both the growth rate of transplantation and resuscitation rate of liquid nitrogen cryopreservation were 100%. Liver metastasis rate was 45.4%; metastasis rates of both lymph node and celiac planting were 38.0%. Transplanted human primary rectal lymphoma could autonomously and invasively grow in the rectum of nude mice, and further developed hematogenous lymph node and celiac planting metastases. Orthotopically transplanted tumors were consistent with the original human tumor in histopathological and ultrastructural features, DNA content and chromosomal karyotype.
CONCLUSION: An orthotopic transplantation model of human primary rectal lymphoma is successfully established in nude mice for the first time, which can completely repeat the natural clinicopathologic course of human primary rectal lymphoma, and metastasis pattern of the model is similar to that of clinical patients. HRBL-0305 provides an ideal animal model platform for the researches on biologic characteristics and experimental therapy of human primary rectal lymphoma.
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