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Comparative Study
. 2006 Feb;97(2):106-12.
doi: 10.1111/j.1349-7006.2006.00147.x.

Phenotypic characterization of endometrial stromal sarcoma of the uterus

Affiliations
Comparative Study

Phenotypic characterization of endometrial stromal sarcoma of the uterus

Kazumi Yamada et al. Cancer Sci. 2006 Feb.

Abstract

Endometrial stromal sarcoma (ESS) of the uterus is a rare uterine malignancy that has not been characterized in detail. To characterize the phenotype of ESS of the uterus, we extracted RNA from ESS and the stroma of normal endometrium using a tissue microdissection system and compared the expression profiles in the two tissues. After suppression subtractive hybridization and differential screening, we detected the metastasis-associated lung adenocarcinoma transcript 1 (MALAT-1) gene as one of the major genes upregulated in ESS, and a full-length placental cDNA clone (CS0DI066YJ10) as one of the major genes downregulated. The results were confirmed by in situ hybridization in four resected specimens of ESS and 36 biopsy specimens of normal endometrial tissue. All ESS (4/4) and all cases of endometrial stromal cells in the proliferative phase (13/13) were positive for MALAT-1, but samples of normal stroma in the secretory phase and menopausal state included some that were negative or weakly positive for MALAT-1 (5/13 and 3/10, respectively). In contrast, all ESS and 12 of 13 cases of stromal cells in the proliferative phase were negative for the full-length placental cDNA clone but 10 of 13 cases of endometrial stromal cells in the secretory phase were positive for transcripts of the gene (P < 0. 05) VSports手机版. These results indicated that endometrial stromal cells have different phenotypic characteristics between proliferative and secretory phases and the tumor cells of ESS have the phenotypic character of endometrial stromal cells in the proliferative phase. .

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Figure 1
Figure 1
Histology of (a) endometrial stromal sarcoma and (b) normal endometrium in secretory phase (HE, ×200). Frozen specimens of two cases were examined by suppression subtractive hybridization.
Figure 2
Figure 2
Histology of normal endometrium. (a) Frozen section after laser capture microdissection, and (b) captured cells on a capsure (×100).
Figure 3
Figure 3
In situ hybridization of metastasis associated lung adenocarcinoma transcript 1 (MALAT‐1) mRNA. (a) The nuclei of the endometrial sarcoma, (b) both epithelial and stromal cells in proliferative phase and (c) epithelial cells in secretory phase were positive for MALAT‐1. However, stromal cells in secretory phase were negative for the gene (×200).
Figure 4
Figure 4
Immunohistochemistry of granulysin protein. Infiltrating lymphocytes (arrows) were positive for the antigranulysin antibody, but stromal cells were negative (×400).
Figure 5
Figure 5
In situ hybridization of CS0DI066YJ10 mRNA. (a) Endometrial stromal sarcoma, (b) endometrial tissue in proliferative phase and (c) epithelial cells in secretory phase were negative for CS0DI066YJ10. The stromal cells in secretory phase (c) and decidual cells in the placenta (d) were selectively positive for the gene (a–c, ×200; d, ×100).

References

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