PengantarMatrix Metalloproteinase-9 (MMP-9) diyakini berperan dalam infiltrasi meningioma ke tulang yang mengakibatkan hiperostosis. Studi prospektif ini diharapkan dapat mempelajari biomarker tersebut dan hubungannya dengan sifat infiltratif meningioma.MetodePenelitian ini bersifat prospektif dengan melakukan pengambilan sampel tumor bersama dengan tulang yang berdekatan melalui operasi. Pewarnaan hematoxylin dan eosin dilakukan untuk mengidentifikasi infiltrasi tumor ke calvaria dari spesimen tulang yang berdekatan. Uji imunohistokimia (IHK) sampel tumor dilakukan untuk menentukan intensitas MMP-9, yang diklasifikasikan menjadi empat kategori: negatif, lemah, sedang, dan kuat.HasilTiga puluh kasus meningioma menjalani kraniotomi pengangkatan tumor. Terdapat 18 (60%) sampel dengan hiperostosis, dan 17 (94,4%) diantaranya menginfiltrasi tengkorak. Tidak ada sampel dengan pewarnaan IHK negatif. Enam belas (59,26%) sampel tumor memiliki intensitas ekspresi MMP-9 sedang, ekspresi lemah ditemukan pada tiga sampel (11,11%), sedangkan intensitas kuat ditemukan pada delapan kasus (29,63%). Hasil kami menunjukkan hubungan yang signifikan antara infiltrasi tumor ke tulang dengan hiperostosis, tetapi intensitas MMP-9 tidak berkorelasi signifikan dengan hiperostosis dan infiltrasi tumor.KesimpulanSebagai salah satu enzim proteolitik, kami menemukan bahwa MMP-9 bukanlah faktor yang signifikan untuk infiltrasi meningioma ke tulang.

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Introduction

Matrix Metalloproteinase-9 (MMP-9) is believed to play a role in meningioma infiltration to the bone that results in hyperostosis. This prospective study is expected to learn about the biomarker and its relationship with the infiltrative nature of meningiomas

Method

A prospective analysis was conducted to retrieve meningioma samples along with adjacent bone through surgery. Hematoxylin and eosin staining was performed to identify tumoral infiltration to the calvaria from adjacent bone specimens. Immunohistochemical (IHC) tests of tumor samples were conducted to determine MMP-9 intensity, classified into four categories: negative, weak, moderate, and strong

Results

Thirty meningioma cases underwent craniotomy tumor removal. There were 18 (60%) samples with hyperostosis, and 17 (94.4%) of them infiltrated the skull. There was no sample with negative IHC staining. Sixteen (59.26%) tumor samples had moderate intensity expression of MMP-9, weak expression was found in three (11.11%) samples, while strong intensity was found in eight (29.63%) cases. Our result showed a significant relationship between tumor infiltration to the adjacent bone with hyperostosis, but the intensity of MMP-9 was not significantly correlated with hyperostosis and tumor infiltration.

Conclusion

As one of the proteolytic enzymes, we found that MMP-9 was not a significant factor for meningioma infiltration to the adjacent bone.