SIMPULAN Peranan Zona Pelusida Dalam Menahan Infeksi Penyakit, Pada Kasus Escherichia Coli K99

9. SIMPULAN

Berdasarkan penelitian yang telah dilakukan, dapat ditarik beberapa kesimpulan berikut ini: E.coli K99 mampu melekat secara spesifik ke permukaan zona pelusida embrio mencit. Pencemaran bakteri E.coli K99 pada embrio, baik yang memiliki zona pelusida utuh mau pun tanpa zona pelusida dapat menghambatnya perkembangan serta mengakibatkan kematian degenerasi embrio. Zona pelusida pada embrio mampu memberi perlindungan terhadap infeksi bakteri E. coli K99. Pembasuhan terhadap embrio yang dicemari bakteri E.coli K99 menggunakan mPBS, tripsin, atau pronase dapat mengeliminasi cemaran bakteri E.coli K99 dan tidak mengakibatkan kematian embrio. Pembasuhan dengan pronase 0,25 dalam mPBS merupakan larutan paling efektif untuk menghilangkan bakteri dari permukaan embrio dibandingkan dengan tripsin atau mPBS. Metode vitrifikasi kriolup dapat digunakan secara efektif untuk kriopreservasi blastosis mencit dan cemaran bakteri E.coli K99 pada blastosis yang divitrifikasi, tidak mempengaruhi tingkat perkembangan embrio ke tahap lebih lanjut Vitrifikasi dengan metode kriolup dapat dipakai untuk kriopreservasi embrio mencit. Vitrifikasi mengakibatkan viabilitas embrio mencit sedikit menurun. Transfer embrio mencit yang telah divitrifikasi ke resipien, berhasil berkembang menjadi fetus dan lahir menjadi mencit normal Zona pelusida dapat melindungi sel-sel embrio dari infeksi E.coli K99, walau pun E.coli K99 terbukti dapat secara spesifik melekat ke permukaan zona pelusida. Bakteri E.coli K99 yang melekat ke permukaan zona pelusida embrio dapat disingkirkan dengan pencucian menggunakan enzim pronase dan embrio tersebut dapat berkembang ke tahap lebih lanjut. Embrio yang memiliki zona pelusida utuh dan divitrifikasi dengan metode kriolup, baik yang tercemar E.coli K99 mau pun tidak, dapat ditransfer dan berkembang sampai lahir. SARAN Perlekatan E.coli K99 bersifat spesifik ke permukaan zona pelusida. Pencemaran bakteri E.coli K99 harus selalu diwaspadai keberadaanya, di samping agen pencemar lainnya. Untuk itu upaya mencegah pencemaran atau mengeliminasi agen pencemar harus selalu diupayakan sebelum embrio tersebut ditransfer ke induk resipien. Pencucian embrio dengan enzim pronase sebaiknya dilakukan terhadap embrio yang akan ditransfer ke induk resipien Pembekuan embrio sebaiknya dilakukan dengan metode vitrifikasi memanfaatkan larutan vitrifikasi EG 15 dan DMSO 15. Krioprotektan tersebut mampu mematikan agen infeksius yang kemungkinan mencemari permukaan zona pelusida. Embrio yang divitrifikasi dengan metode kriolup dapat berkembang secara in vitro maupun in vivo. 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LAMPIRAN Lampiran 1 Medium kultur embrio in vitro Kalium simplex optimation medium KSOM Stok A 2x solution Bahan mM dlm KSOMaa gL g50mL g30mL g20mL g10mL NaCl BM=58,44 95 11,1000 0,5550 0,3330 0,2220 0,1110 KCl BM=74,56 2,5 0,3720 0,0186 0,0112 0,0074 0,0037 KH2PO4 BM=136,09 0,35 0,0940 0,0047 0,0028 0,0019 0,0009 MgSO4.7H2O BM=246,68 0,2 0,0990 0,0050 0,0030 0,0020 Sodium lactate BM=109,1 10 2,1820 0,1091 0,0655 0,0436 0,0218 Sodium pyruvate BM=110,05 0,2 0,0440 0,0022 0,0013 0,0009 0,0004 D-Glucose BM=180,… 5,5 2,0000 0,1000 0,0600 0,0400 0,0200 Glycyl-Glutamin Hydrate BM=146,1 2 0,5838 0,0292 0,0175 0,0117 0,0058 NaHCO3 BM=84,01 25 4,2000 0,2100 0,1260 0,0840 0,0420 Phenol Red 0,5 2.000 100 60 40 20 Catatan: NaHCO3 dicampur pada saat membuat KSOMaa, dengan mencampurkan setengah dosis saja Stok B, C, E 100x solution Bahan mM dlm KSOMaa g5ml CaCl2.2H2O BM=147,0 = Stok B 1,71 0,1256 HEPES-Sodium Salt BM=238,3 = Stok C 20 2,3830 EDTA BM=372,2 = Stok E 0,01 0,00186 Catatan: - EDTA dilarutkan dalam 200 µl NaOH 1 N kemudian ditambahkan 4,8 ml DI - Stok B,C, dan E dibuat secara terpisah KSOMaa Bahan 100mL 30mL 20mL 10mL 5mL Stok A 50 15 10 5 2,5 Diionise water DI 44,5 13,35 8,9 4,45 2 Stok B 1 0,3 0,2 0,1 0,05 EAA 1 0,3 0,2 0,1 0,05 NEAA 0,5 0,15 0,1 0,05 5mL BSA 0,4 0,4 0,12 0,08 0,04 2,5 Gentamycin 50µgml µL 100 30 20 10 2 Stok E mL 1 0,3 0,2 0,1 0,05 Catatan: osmolaritas 260; filter medium menggunakan 0,22 µm filter Ekuilibrasi medium sebelum digunakan Medium dapat digunakan selama 1-2 minggu, jika disimpan pada suhu 4 o C KSOMaa + HEPES Bahan 100mL 30mL 20mL 10mL 5mL Stok A 50 15 10 5 2,5 Diionise water DI 44,5 13,35 8,9 4,45 2 Stok B 1 0,3 0,2 0,1 0,05 Stok C 1 0,3 0,2 0,1 0,05 EAA 1 0,3 0,2 0,1 0,05 NEAA 0,5 0,15 0,1 0,05 0,025 BSA 0,4 g 0,4 0,12 0,08 0,04 0,02 Gentamycin 50µgml µL 100 30 20 10 5 Stok E mL 0,1 Lampiran 2 Medium untuk mengembangkan bakteri E.coli K99 Penyiapan Minca + Iso Vitalex Minca + Is Larutan A, menurut Ginee et al. 1977. KH 2 PO 4 2.72 g Na 2 HPO 4 20.2 g Air suling 1000 ml Seluruh bahan tersebut diencerkan dalam airsuling dan pastikan pH-nya 7.5, kucurkan 500 ml kedalam labu Erlenmeyer dan selanjutnya di autoklaf pada suhu 121 C selama 15 menit. Larutan garam-garam trace Minca + Is medium larutan B MgSO 4 .7H 2 O 10 g MnCl 2 .4H 2 O 1 g FeCl 3 .6H 2 O 0.135 g CaCl 2 2H 2 O 0.4 g Air suling 1000 ml Seluruh bahan tersebut dilarutkan dalam airsuling kemudian dimasukan kedalam labu Erlenmeyer dan disucihamakan pada suhu 110 C selama 10 menit. Minca + Is larutan C Lima gram casein hydrolysate Oxoid L41 dilarutkan dalam 1000 ml airsuling, pastikan pH-nya menjadi 7.5 dan disucihamakan pada suhu 121 C selama 15 menit. Minca + Is larutan D Dua puluh empatr gram agae Oxoid No 3 Oxoid 113 dilarutkan dalam 920 ml airsuling dengan penguapan 100 C. Pastikan pH-nya menjadi 7.5 dan kemudian kucurkan sebanyak 460 ml kedalam labu Erlenmeyer 1 liter dan diautoklaf pada suhu 121 C selama 15 menit. Lima ratus mili liter larutan-A dipanaskan hingga 56 C dan 460 ml larutan-D dicairkan pada suhu 100 C. Larutan-A dan B dicampur, dan campuran tersebut didinginkan hingga 56 C. Vial vitox SR90A diencerkan isinya dengan kandungan vial vitox SR90B dan ditambahkan secara bersamaan dengan 1 ml larutan-B dan 20 ml larutan-C. Medium tersebut dicampur secara perlahan dan dituang sebanyak 5 ml kedalam botol universal steril, 2 ml kedalam botol bijou untuk membuat agar miring, 20 ml kedalam cawan petri gelas yang steril atau cawan petri dispossable, dan 150 ml dimasukan kedalam labu Roux. Setelah media memadat, seluruh media yang disiapkan diinkubasi pada suhu 37 C selama 18-24 jam untuk menguji sterilitas medium tersebut. Lampiran 3 Penyiapan reagen untuk uji ELISA

1. Normal saline steril sodium khlorida 0.85