Rahmana Emran Kartasasmita
Sekolah Farmasi, Institut Teknologi Bandung, Jl, Ganesha No.10

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KAJIAN DOCKING DAN PREDIKSI BEBERAPA ASPEK FARMAKOKINETIKA DESAIN MOLEKUL TURUNAN KUININ SEBAGAI UPAYA MENEMUKAN KANDIDAT SENYAWA ANTIMALARIA YANG BARU Kartasasmita, Rahmana Emran; Anugrah, Rina; Tjahjono, Daryono Hadi
Kartika Jurnal Ilmiah Farmasi Vol 3, No 1 (2015)
Publisher : Universitas Jenderal Achmad Yani, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (470.422 KB) | DOI: 10.26874/kjif.v3i1.91

Abstract

ABSTRAK Kuinin merupakan obat antimalaria dengan t½ eliminasi yang panjang, mencapai 11-18 jam, serta memiliki berbagai efek samping yang cukup berat. Dikaitkan dengan struktur dan sifat fisikokimianya, hal tersebut dapat disebabkan tingginya lipofilisitas kuinin dan metabolitnya serta kemungkinan afinitas senyawa tersebut terhadap reseptor tertentu, di luar target kerja pada plasmodium. Penelitian ini bertujuan untuk memperoleh desain turunan kuinin yang memiliki aktivitas antimalaria setara atau lebih baik dari kuinin dengan efek samping yang lebih ringan menggunakan metode molecular modeling, terkhususnya kajian docking antara ligan dengan target. Desain turunan kuinin dilakukan melalui substitusi atom hidrogen pada cincin kuinolin dengan gugus fungsi polar, mencakup gugus -OH, -COOH, dan -SO3H. Ferriprotoporfirin IX digunakan sebagai target kerja antimalaria dan reseptor muskarinik M2 sebagai target kerja lain yang diperkirakan menyebabkan efek samping. Beberapa aspek farmakokinetika desain turunan kuinin yang diperoleh diprediksi secara kualitatif menggunakan aturan Lipinski, dan secara kuantitatif menggunakan program PreADMET, terdiri dari parameter absorpsi, distribusi serta reabsorpsi di ginjal. Telah diperoleh 4 desain senyawa turunan kuinin yang potensial yaitu kuinin tersubstitusi -OH pada atom C7’, kuinin tersubtitusi -COOH pada atom C5’ dan -OH pada atom C6’, kuinin tersubtitusi –SO3H pada atom C8’ serta kuinin tersubtitusi -SO3H pada atom C8’ dan -OH pada atom C6’. Kata kunci   :  antimalaria, docking, ferriprotoporfirin IX, kuinin. ABSTRACT Quinine is an antimalarial drug with a long elimination half-life (t ½), about 11-18 hours and variuos severe side effects. Considering the structure and physico-chemical properties of quinine, those side effects and toxicities might be related with high lipophilicity of quinine and its metabolites and their probable affinities on certain receptor in addition to work target in plasmodium. This study aims to obtain designs of quinine derivatives having equivalent or better antimalarial activities with lesser side effects applying molecular modeling method, especially docking study between ligand and target. Quinine derivatives were designed by substitution of hydrogen atoms of different positions in the quinoline ring with three different polar functional groups, including –OH, -COOH, and -SO3H. Ferriprotoporphyrin IX was chosen as work target in plasmodium, while M2 muscarinic receptor was used as additional work target predicted to be responsible for side effects. Pharmacokinetic aspects of quinine derivatives designs were qualitatively predicted by Lipinski’s rules of five and quantitatively by online PreADMET program, including absorption, distribution, and reabsorption in kidney. 4 compound designs were obtained and predicted to be potential candidates, including quinine substituted with -OH at C7 atom, quinine substituted with –COOH at C5’ and –OH at C6’ atoms, quinine substituted with –SO3H at C8’ and quinine substituted with -SO3H at C8’ and –OH at C6’ atoms. Key words   : antimalarial drug, docking, ferriprotoporphyrin IX, lipophilicity
ISOLATE OF HETEROTROPHIC MICROALGAE AS A POTENTIAL SOURCE FOR DOCOHEXAENOIC ACID (DHA) Julianti, Elin; Fathurohman, Mochamad; Damayanti, Sophi; Kartasasmita, Rahmana Emran
Marine Research in Indonesia Vol 43, No 2 (2018)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2269.65 KB) | DOI: 10.14203/mri.v43i2.264

Abstract

Docosahexaenoic acid (DHA) is one of essential fatty acids that are beneficial to health. Nowadays, the source of docosahexaenoic acid (DHA) is mainly obtained from fish which are extracted into fish oil products. However, the fish oil products still have some drawbacks in term of purity, acceptable flavor for costumers, and also their not environmental friendly production process. As an alternative solution, heterotrophic microalgae can be used as a potential source for DHA due to their excellence compared to fish oil products. The aim of this study is to isolate the heterotropic microalgae that can produce DHA. The heterotrophic microalgae were isolated from mangrove fallen leaves (Rhizophora apiculata) by using direct planting method. The morphology of pure microalgae colony were observed through light microscope and subsequently fermented for 14 days. Fatty acids were extracted and methylated through direct transesterification method. Identification and quantification of DHA were conducted by using gas chromatography. The results were four isolates of heterotropic microalgae, namely MTKC1, MTKC2, MTKC3, and MTKC4. The extract of MTKC2 that only showed the content of DHA with value of 9.2 % w/w. Therefore MTKC2 is a potential source for DHA. The MTKC2 was further identified by using molecular biology method and confirmed as Thraustochytrium aureum.
ISOLATE OF HETEROTROPHIC MICROALGAE AS A POTENTIAL SOURCE FOR DOCOHEXAENOIC ACID (DHA) Julianti, Elin; Fathurohman, Mochamad; Damayanti, Sophi; Kartasasmita, Rahmana Emran
Marine Research in Indonesia Vol 43 No 2 (2018)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2269.65 KB) | DOI: 10.14203/mri.v43i2.264

Abstract

Docosahexaenoic acid (DHA) is one of essential fatty acids that are beneficial to health. Nowadays, the source of docosahexaenoic acid (DHA) is mainly obtained from fish which are extracted into fish oil products. However, the fish oil products still have some drawbacks in term of purity, acceptable flavor for costumers, and also their not environmental friendly production process. As an alternative solution, heterotrophic microalgae can be used as a potential source for DHA due to their excellence compared to fish oil products. The aim of this study is to isolate the heterotropic microalgae that can produce DHA. The heterotrophic microalgae were isolated from mangrove fallen leaves (Rhizophora apiculata) by using direct planting method. The morphology of pure microalgae colony were observed through light microscope and subsequently fermented for 14 days. Fatty acids were extracted and methylated through direct transesterification method. Identification and quantification of DHA were conducted by using gas chromatography. The results were four isolates of heterotropic microalgae, namely MTKC1, MTKC2, MTKC3, and MTKC4. The extract of MTKC2 that only showed the content of DHA with value of 9.2 % w/w. Therefore MTKC2 is a potential source for DHA. The MTKC2 was further identified by using molecular biology method and confirmed as Thraustochytrium aureum.
SINTESIS SORBENT EKSTRAKSI FASE PADAT DENGAN TEKNIK MOLECULAR IMPRINTING DENGAN MONOMER AKRILAMID UNTUK EKSTRAKSI GLIBENKLAMID DARI SERUM DARAH Hasanah, Aliya Nur; Kartasasmita, Rahmana Emran; Ibrahim, Slamet
JFIOnline | Print ISSN 1412-1107 | e-ISSN 2355-696X Vol 7, No 4 (2015)
Publisher : Indonesian Research Gateway

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Glibenklamid merupakan obat yang digunakan dalam penanganan diabetes melitus dan digunakan dalam jangka waktu yang panjang. Efisiensi pemisahan glibenklamid dibutuhkan untuk monitoring kadar obat dalam darah dalam upaya memastikan efektivitas obat. Penelitian ini dilakukan untuk memperoleh sorben Molecular Imprinted Solid Phase Extraction (MI-SPE) untuk pemisahan glibenklamid dari sampel serum. Penelitian dilakukan dengan tahapan sintesis metode polimerisasi ruah,karakterisasi MI-SPE yang dihasilkan dan aplikasinya pada sampel serum. Sintesis MI-SPE dilakukan menggunakan dua komposisi rasio template:monomer:cross linker dalam kloroform sebagai porogen. Hasil pengujian menunjukkan bahwa adsorpsi MI-SPE dengan rasio 1:6:70 menghasilkan persentase adsorpsi 88,47% pada Molecular Imprinted Polymer (MIP) dan 54,33% terhadap Non Imprinted Polymer (NIP). Aplikasi sorben MIP dalam ekstraksi fase padat dilakukan menggunakan 200 mg polimer pada cartridge 3 mL. Sampel serum yang ditambahkan glibenklamid kemudian dilewatkan ke dalam MIP menghasilkan nilai persen perolehan kembali 89,67;93,75;92,64 dan 82,82% untuk konsentrasi 0,5;2;4 dan 6 mg L-1. Hasil penelitian menunjukkan bahwa MI-SPE yang dibuat dari monomer akrilamid dengan komposisi 1:6:70 dapat digunakan sebagai pretreatment untuk ekstraksi glibenklamid dari serum darah.
SINTESIS SORBENT EKSTRAKSI FASE PADAT DENGAN TEKNIK MOLECULAR IMPRINTING DENGAN MONOMER AKRILAMID UNTUK EKSTRAKSI GLIBENKLAMID DARI SERUM DARAH Hasanah, Aliya Nur; Kartasasmita, Rahmana Emran; Ibrahim, Slamet
Jurnal Farmasi Indonesia Vol 7, No 4 (2015)
Publisher : Jurnal Farmasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (424.131 KB) | DOI: 10.35617/jfi.v7i4.255

Abstract

Glibenklamid merupakan obat yang digunakan dalam penanganan diabetes melitus dan digunakan dalam jangka waktu yang panjang. Efisiensi pemisahan glibenklamid dibutuhkan untuk monitoring kadar obat dalam darah dalam upaya memastikan efektivitas obat. Penelitian ini dilakukan untuk memperoleh sorben Molecular Imprinted Solid Phase Extraction (MI-SPE) untuk pemisahan glibenklamid dari sampel serum. Penelitian dilakukan dengan tahapan sintesis metode polimerisasi ruah,karakterisasi MI-SPE yang dihasilkan dan aplikasinya pada sampel serum. Sintesis MI-SPE dilakukan menggunakan dua komposisi rasio template:monomer:cross linker dalam kloroform sebagai porogen. Hasil pengujian menunjukkan bahwa adsorpsi MI-SPE dengan rasio 1:6:70 menghasilkan persentase adsorpsi 88,47% pada Molecular Imprinted Polymer (MIP) dan 54,33% terhadap Non Imprinted Polymer (NIP). Aplikasi sorben MIP dalam ekstraksi fase padat dilakukan menggunakan 200 mg polimer pada cartridge 3 mL. Sampel serum yang ditambahkan glibenklamid kemudian dilewatkan ke dalam MIP menghasilkan nilai persen perolehan kembali 89,67;93,75;92,64 dan 82,82% untuk konsentrasi 0,5;2;4 dan 6 mg L-1. Hasil penelitian menunjukkan bahwa MI-SPE yang dibuat dari monomer akrilamid dengan komposisi 1:6:70 dapat digunakan sebagai pretreatment untuk ekstraksi glibenklamid dari serum darah.