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Abstrak :
Paparan logam Fe diindikasikan penyebab genotoksisitas melalui pembentukan adduct 8-Hydroxy-2'Deoxyguanosine (8-OHdG). Pembentukan DNA adduct 8-Hydroxy-2'Deoxyguanosine (8-OHdG) diakibatkan stres oksidatif yang merusak DNA. stres oksidatif yang berupa radikal bebas OH timbul karena reaksi senyawa Fe dengan senyawa lain di dalam tubuh melalui reaksi Fenton. Konsentrasi 8-Hydroxy-2'Deoxyguanosine (8-OHdG) dalam urin dapat dievaluasi menggunaan alat LC-MS/MS. Konsentrasi 8-OHdG antara kelompok pengguna logam Fe dan kelompok kontrol dihitung menggunakan regresi linier kemudian diuji Independent T-test SPSS versi 23. Hasil penelitian diketahui konsentrasi rerata 8-OHdG kelompok pengguna logam Fe 153,807 +- 25,2501 ppb, sedangkan kelompok kontrol rerata konsentrasi 8-OHdG adalah 191,979 +- 26,2891 ppb. Terdapat pengaruh paparan logam Fe terhadap pembentukan 8-OHdG tetapi tidak ada perbedaan signifikan secara statistik antara kedua kelompok tersebut dengan nilai p=0,305 (p>0,05). Kesimpulan yang dapat ditarik adalah paparan Fe pada piranti ortodonti yang mengandung logam Fe dapat menjadi pemicu terbentuknya adduct 8-OHdG sehingga dapat menjadi bioindikator genotoksisitas dan barang bukti identifikasi toksikologi forensik tetapi masih aman untuk digunakan sebagai alat perawatan di bidang kedokteran gigi. ......Exposure to Fe metal is indicated as a cause of genotoxicity through the formation of Adduct 8-Hydroxy-2'-Deoxyguanosine (8-OHdG). The formation of 8-OHdG is caused by oxidative stress which damage structure of DNA. Oxidative stress in the form of free radicals OH arises because of reaction of Fe compound with other compound in the body through the Fenton reaction. the concentration of DNA adduct 8-OHdG in urine can be evaluated using LC-MS/MS. Concentration 8-OHdG between the Fe metal users group and the control group was calculated using linear regression then tested Independent T-test SPSS version 23. The result of the study found the average concentration of 8-OHdG Fe metal users group 153,807 +- 25,2501 ppb, while the control group the mean concentration 8-OHdG was 191,979 +- 26,2891 ppb. There is an influence of Fe metal exposure on the formation 8-OHdG but there is no statistically significant difference between of two group with a value p=0,305 (p>0,05). The conclusion that can be drawn is that exposure Fe at ortodontic devices containing Fe metal can as trigger the formation 8-OHdG adduct can be bioindicator genotoxicity and forensic toxicology evidence of identification but still save for use as a treatment in the dentistry.

Abstrak :
Objectives: The objective of the study were to determine if there was any (bisphenol A) BPA release from three adhesive brands, to determine the differences of BPA release between three adhesive brands, to determine the genotoxicity from three adhesive brands, and to determine the correlation of BPA release and genotoxicity. Methods: Three branded adhesives materials were polimerized in mold and immersed in pH 7 and 4 artificial saliva from 24 to 720 hours. The artificial saliva was tested with spectrophotometry test to see BPA release at 24, 240, 480, and 720 hours, then freeze dried to get solid extract. Combination of the extract and lymphocite culture (male and female) then tested with in vitro cytokinesis-block micronucleus (MN) assay to see genotoxicity level of three adhesives at 24, 240, 480, and 720 hours as well. Results: The BPA release occured at 720 hours by Adhesive 1: 0.013μg/L; Adhesive 2: 0.11μg/L; Adhesive 3: 0.036μg/L. There was a statistically significant difference between BPA release with time (F = 505.98; p=0.00) and brands (F = 147.65; p = 0.00). Time and BPA release interaction also showed a statistically significant difference (F=13.35; p=0.00). Genotoxicity can be seen at 720 hours on Flowtain LV sample (MN frequency: male: 0.044; female: 0.053). Conclusion: The number of BPA release of all brand can be seen from the first 24 hours, and were increasing from 24 to 720 hours. Genotoxicity can be seen from one of the adhesive brand at 720 hours.There was correlation between BPA leaching and micronucleus frequency.

Abstrak :
ABSTRAK


Metil karbamat merupakan pestisida pilihan setelah penggunaan dikhloro difenil trikhloroetana (DDT) dilarang. Meskipun tergolong aman karena cepat mengalami biodegradasi, metil karbamat diduga mempunyai efek genotoksik pada organisme bukan sasaran. Bentuk pengujian yang mudah dan cepat untuk mendeteksi potensi genotoksik suatu zat adalah dengan uji mikronukleus. Penelitian ini bertujuan untuk mengetahui potensi genotoksik metil karbamat dengan parameter induksi mikronukleus pada kultur limfosit manusia. Limfosit manusia dipapar dengan metil karbamat konsentrasi 10, 20, 50, dan 100 µg/ml selama 3 jam. Mikronukleus diamati dari sediaan kultur limfosit dan dihitung per 1.000 sel limfosit untuk tiap perlakuan. Jumlah rata-rata mikronukleus tertinggi (4,167) didapat pada konsentrasi 10 µg/ml dan terendah (3,333) pada konsentrasi 20µg/mi. Metil karbamat pada kondisi penelitian yang dilakukan mampu menginduksi mikronukleus alaupun hasil uji statistik (uji Dunn α = 0,25) menuniukkan baha jumlah mikronukleus pada konsentrasi 10, 20, 50, dan 100 µg/ml tidak berbeda nyata dibandingkan dengan kontrol negatif.