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Desna Qurratul Aini
Abstrak :
[ ABSTRAK
Keji Beling (Strobilanthes crispus) merupakan salah satu tanaman yang dapat dimanfaatkan sebagai antihiperkolesterolemia dengan senyawa aktif fitosterol. Pembuatan nanopartikel keji beling sebagai penghantar obat dilakukan untuk mencapai efektivitas obat menuju organ target. Penelitian ini bertujuan mendapatkan gambaran profil pelepasan nanopartikel keji beling pada media fluida sintetik dengan variasi konsentrasi penyalutnya serta pengujian inhibisi ekstrak keji beling dalam menghambat enzim HMG KoA Reduktase. Penelitian terdiri atas 4 tahap yaitu ekstraksi keji beling, pembuatan nanopartikel, uji profil pelepasan serta uji inhibisi enzim HMG koA Reduktase. Penelitian ini menghasilkan nanopartikel dengan efisiensi penyalut terbesar(94,64%) pada Kitosan 1% : STPP 1%, dan loading capacity terbesar (31,28%) diperoleh pada variasi Kitosan 1% :1,5%. Profil pelepasan dengan karakter penyalut yang resisten pada kondisi lambung diperoleh oleh variasi Kitosan 1%:1,5%. Determinasi analitis secara FTIR membuktikan bahwa ekstrak telah tersalut dalam penyalutnya yang dibuktikan dengan adanya gugus alkohol. Morfologi FESEM dengan ukuran partikel terkecil diperoleh pada variasi kitosan 1%: STPP 1% dengan ukuran terkecil 132 nm. Penurunan kadar kolesterol oleh daun keji beling terjadi melalui penghambatan enzim HMG KoA Reduktase. Penelitian ini membuktikan bahwa ekstrak keji beling mampu berperan sebagai inhibitor dalam menghambat enzim HMG-KoA dengan persentase inhibisi 15%-17,8%.
ABSTRACT Nasty Shard (Strobilanthes crispus) is one of herbs that utilized as antihypercholesterolemia with phytosterol as active compound. Producing nanoparticle of nasty shard as drug delivery is to obtain efectiveness drug to released target. This research was design to obtain released profile assay of nasty shard nanoparticle in simulated digestive fluid with concentration variation of nanoparticle and inhibition assay of nasty shard extract to inhibit HMG CoA Reductase.This resarch consist of 4 stages those are extraction of nasty shard leaves, nanoparticle designed, release profile assay and inhibition assay of HMG CoA Reductase. This research produce nanoparticle with highest encapsulation efficiency (94,64%) obtained by chitosan concentration 1% and STPP 1%, while the highest loading capacity (31,28%) was obtained by chitosan concentration 1% and STPP 1,5%. Released profile assay show nanoparticle characteristic which resistant in gastric condition with chitosan consentration 1% and STPP 1,5%. FTIR analysis show extract has encapsulated by alcohol group. Morphology by FESEM of smallest particle sized (132 nm) Obtained by chitosan concentartion 1% and STPP 1,5%. The decreasing of cholesterol by extract through inhibit HMG CoA Reductace. This research shown nasty shard leaves extract is capabable of acting as inhibitor of HMG CoA Reductase enzime with percentage inhibition from15%-17,8% ;Nasty Shard (Strobilanthes crispus) is one of herbs that utilized as antihypercholesterolemia with phytosterol as active compound. Producing nanoparticle of nasty shard as drug delivery is to obtain efectiveness drug to released target. This research was design to obtain released profile assay of nasty shard nanoparticle in simulated digestive fluid with concentration variation of nanoparticle and inhibition assay of nasty shard extract to inhibit HMG CoA Reductase.This resarch consist of 4 stages those are extraction of nasty shard leaves, nanoparticle designed, release profile assay and inhibition assay of HMG CoA Reductase. This research produce nanoparticle with highest encapsulation efficiency (94,64%) obtained by chitosan concentration 1% and STPP 1%, while the highest loading capacity (31,28%) was obtained by chitosan concentration 1% and STPP 1,5%. Released profile assay show nanoparticle characteristic which resistant in gastric condition with chitosan consentration 1% and STPP 1,5%. FTIR analysis show extract has encapsulated by alcohol group. Morphology by FESEM of smallest particle sized (132 nm) Obtained by chitosan concentartion 1% and STPP 1,5%. The decreasing of cholesterol by extract through inhibit HMG CoA Reductace. This research shown nasty shard leaves extract is capabable of acting as inhibitor of HMG CoA Reductase enzime with percentage inhibition from15%-17,8% , Nasty Shard (Strobilanthes crispus) is one of herbs that utilized as antihypercholesterolemia with phytosterol as active compound. Producing nanoparticle of nasty shard as drug delivery is to obtain efectiveness drug to released target. This research was design to obtain released profile assay of nasty shard nanoparticle in simulated digestive fluid with concentration variation of nanoparticle and inhibition assay of nasty shard extract to inhibit HMG CoA Reductase.This resarch consist of 4 stages those are extraction of nasty shard leaves, nanoparticle designed, release profile assay and inhibition assay of HMG CoA Reductase. This research produce nanoparticle with highest encapsulation efficiency (94,64%) obtained by chitosan concentration 1% and STPP 1%, while the highest loading capacity (31,28%) was obtained by chitosan concentration 1% and STPP 1,5%. Released profile assay show nanoparticle characteristic which resistant in gastric condition with chitosan consentration 1% and STPP 1,5%. FTIR analysis show extract has encapsulated by alcohol group. Morphology by FESEM of smallest particle sized (132 nm) Obtained by chitosan concentartion 1% and STPP 1,5%. The decreasing of cholesterol by extract through inhibit HMG CoA Reductace. This research shown nasty shard leaves extract is capabable of acting as inhibitor of HMG CoA Reductase enzime with percentage inhibition from15%-17,8% ]
Depok: Fakultas Teknik Universitas Indonesia, 2015
S59792
UI - Skripsi Membership  Universitas Indonesia Library
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Agung Kristiyanto
Abstrak :
Ekstrak biji melinjo Gnetum gnemon L. diketahui berperan dalam aktivitas penghambatan HMG-KoA reduktase. Sedangkan iradiasi adalah salah satu metode dalam sterilisasi bahan alam. Studi ini bertujuan untuk mengetahui pengaruh iradiasi gama terhadap aktivitas penghambatan HMG-KoA reduktase dan angka lempeng total pada biji melinjo. Biji melinjo diiradiasi dengan berbagai dosis yaitu 0, 2,5, 5, 7,5, dan 10 kGy. Ekstraksi dilakukan dengan menggunakan metode refluks dengan pelarut etanol. Angka lempeng total ALT ditentukan menggunakan metode aerobic count plate melalui pengenceran suspensi serbuk biji melinjo. Sementara uji aktivitas penghambatan HMG-KoA reduktase menggunakan assay kit HMG-KoA reduktase. Dalam uji aktivitas penghambatan HMG-KoA reduktase, diperoleh persentase penghambatan oleh standar pravastatin sebesar 97,41 dengan IC50 76,70 nM. Ekstrak biji melinjo berbagai dosis iradiasi diuji aktivitas penghambatannya dan diperoleh persentase penghambatan tertinggi sebesar 97,30 pada dosis iradiasi 2,5 kGy. Pada penetapan ALT, serbuk biji melinjo berbagai dosis iradiasi menunjukkan tidak adanya pertumbuhan mikroba. Berdasarkan penelitian ini, dapat disimpulkan bahwa biji melinjo berada dalam kondisi steril dan iradiasi 2,5 kGy adalah dosis optimum untuk menghambat HMG-KoA reduktase secara signifikan.
Melinjo Gnetum gnemon L. seed extract is known to play a role in the inhibitory activity of HMG CoA reductase. Irradiation is a method to sterilize natural products. This study aimed to determine the effect of gamma irradiation on the inhibitory activity of HMG CoA reductase and total plate count TPC . Melinjo seeds were irradiated with various doses of 0, 2.5, 5, 7.5, and 10 kGy. The extraction was carried out by ethanol using reflux method. TPC was determined by aerobic count plates method using stock dilution of melinjo seeds powder suspensions. HMG CoA inhibitory activity was determined using HMG CoA reductase assay kit. In determination of HMG CoA reductase, the inhibitory percentage of pravastatin standard was 97.41 and the IC50 was 76.70 nM. Irradiated melinjo seed extracts were tested for inhibitory activity and the highest inhibition percentages were 97.30 of 2,5 kGy. In the determination of TPC, the powder of melinjo seeds for all irradiation doses showed no microbial growth. Based on this research, it can be concluded that non irradiated and irradiated melinjo seeds were free from microbial growth and the gamma irradiation dose of 2.5 kGy was optimum dose to inhibit HMG CoA reductase, significantly.
Depok: Fakultas Farmasi Universitas Indonesia, 2017
S69840
UI - Skripsi Membership  Universitas Indonesia Library
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Intan Fikri Purnama Sari
Abstrak :
Biji melinjo Gnetum gnemon L. diketahui mengandung senyawa fenolik yang mampu menghambat aktivitas HMG-KoA reduktase. Ionic liquid IL [bmim]Br merupakan green solvent, yang dengan menggunakan metode microwave assisted extraction MAE dilaporkan dapat menarik senyawa fenolik setara dengan pelarut organik. Penelitian ini bertujuan untuk menentukan kadar fenolik total dan penghambatan aktivitas HMG-KoA reduktase dari ekstrak biji melinjo yang diekstraksi menggunakan metode [bmim]Br-MAE. Biji melinjo diekstraksi dengan berbagai faktor ekstraksi berdasarkan Response Surface Methodology RSM dengan jumlah total ekstraksi yaitu 17 runs menggunakan metode [bmim]Br-MAE. Ekstrak yang diperoleh ditentukan kadar fenolik total dan penghambatan aktivitas HMG-KoA reduktase. Pada penentuan penghambatan aktivitas HMG-KoA reduktase, persentase inhibisi pada standar pravastatin yaitu 96.25 dengan IC50 76.72 nM. Semua ekstrak diuji dan didapati bahwa ekstrak pada run ke-11 merupakan yang paling optimum dengan persentase inhibisi 95.89 dan kadar fenolik total 1.96 mg GAE/ g simplisia. Berdasarkan penelitian ini, dapat disimpulkan bahwa metode [bmim]Br-MAE dapat digunakan sebagai salah satu metode ekstraksi untuk senyawa fenolik yang bertanggung jawab pada penghambatan aktivitas HMG-KoA reduktase.
Melinjo Gnetum gnemon L. seed was known to contain phenolic compounds that capable of inhibiting the activity of HMG CoA reductase. Ionic liquid IL bmim Br is a green solvent, with microwave assisted extraction MAE method, reported to be able to extract phenolic compounds comparable to organic solvent. This study aims to determine the total phenolic content and inhibitory activity of HMG CoA reductase from melinjo seed extract which was extracted using bmim Br MAE method. Melinjo seeds were extracted with various extraction factors based on Response Surface Methodology RSM with a total of 17 runs, using bmim Br MAE method. The obtained extract was determined of total phenolic content and inhibitory activity of HMG CoA reductase. In determination of HMG CoA reductase inhibition activity, the inhibitory percentage of pravastatin standard was 96.25 and the IC50 is 76.72 nM. All the extracts were tested and was found that the 11th run was the optimum condition with 95.89 inhibition and total phenolic content of 1.96 mg GAE g the seed powder. Based on this study, it can be concluded that bmim Br MAE method can be used as an extraction method for the extraction of phenolic compounds, that responsible on HMG CoA reductase inhibitory activity.
Depok: Fakultas Farmasi Universitas Indonesia, 2017
S68055
UI - Skripsi Membership  Universitas Indonesia Library
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Najah Fadilah Putri
Abstrak :
Kementerian Kesehatan Republik Indonesia menyebutkan bahwa gangguan kardiovaskular, yang umumnya disebabkan oleh tingkat kolesterol yang tinggi, merupakan penyakit dengan tingkat kematian tertinggi di Indonesia. Meskipun statin sangat efektif dalam menurunkan kolesterol melalui inhibisi enzim HMG-CoA reduktase, berbagai penelitian telah membuktikan bahwa statin dapat menyebabkan berbagai efek samping, seperti kerusakan hati dan otot. Salah satu herba yang banyak ditemukan di Indonesia, daun kejibeling (Strobilanthes crispus), telah terbukti kaya akan senyawa fenolik dan flavonoid, serta dapat menurunkan kadar kolesterol. Penelitian ini bertujuan untuk mempelajari lebih lanjut potensi daun kejibeling sebagai obat penurun kolesterol dengan menentukan struktur, kemampuan inhibisi, serta jenis inhibisi senyawa fenolik dan flavonoid yang bersifat hipolipidemik dalam ekstrak etanol daun kejibeling. Hidrolisis enzimatik dengan bantuan selulase (suhu 30oC, waktu 2 jam) dan UA-ATPE (Ultrasound Assisted-Aqueous Two Phase Extraction) pada kondisi optimum (rasio pelarut 33% etanol (w/w) dan 14% (NH4)2SO4 (w/w), suhu 27oC, waktu 1 jam) digunakan untuk mengekstraksi daun kejibeling. Ekstrak kemudian difraksinasi menggunakan silica gel 60 dan eluen toluena-etil asetat 1:1 (v/v). Fraksi-fraksi yang terbentuk kemudian dianalisis lebih lanjut menggunakan LC-MS/MS-QToF dan uji inhibisi HMG-CoA reduktase untuk mengetahui kandungan serta sifat hipolipidemiknya. Salah satu isolat dari ekstrak kejibeling terbukti memiliki kemampuan inhibisi terhadap HMG-CoA reduktase sebesar 41,36% dengan tipe inhibisi non-kompetitif. Pada penelitian ini, ditemukan setidaknya 4 senyawa fenolik yang memiliki potensi untuk menurunkan kolesterol, yaitu Piceatannol,  Cyclocurcumin,  Xanthoangelol G, dan 7'-Carboxy-gamma-tocotrienol. ...... The Ministry of Health of the Republic of Indonesia stated that cardiovascular disorders, which are generally caused by high cholesterol levels, are the disease with the highest mortality rate in Indonesia. Although statins are very effective in lowering cholesterol through inhibition of the enzyme HMG-CoA reductase, various studies have shown that statins can cause various side effects, such as liver and muscle damage. One of the herbs commonly found in Indonesia, kejibeling leaf (Strobilanthes crispus), has been shown to be rich in phenolic and flavonoid compounds and can reduce cholesterol levels. This study aimed to further study the potential of kejibeling leaves as a cholesterol-lowering drug by determining the structure, inhibitory ability, and the type of inhibition of hypolipidemic phenolic and flavonoid compounds in the ethanol extract of kejibeling leaves. Enzymatic hydrolysis with the help of cellulase (temperature 30oC, time 2 hours) and UA-ATPE (Ultrasound Assisted-Aqueous Two Phase Extraction) at optimum conditions (solvent ratio 33% ethanol (w/w) and 14% (NH4)2SO4 (w/ w), temperature 27oC, time 1 hour) was performed to extract kejibeling leaves. The extract was then fractionated using silica gel 60 and toluene-ethyl acetate 1:1 (v/v) eluent. The formed fractions were further analyzed using LC-MS/MS-QToF and HMG-CoA reductase inhibition test to determine the content and hypolipidemic properties. One of the isolates from the kejibeling extract was shown to have the ability to inhibit HMG-CoA reductase of 41.36% with a non-competitive type of inhibition. In this study, found at least 4 phenolic compounds that have the potential to lower cholesterol, namely Piceatannol, Cyclocurcumin, Xanthoangelol G, and 7'-Carboxy-gamma-tocotrienol.
Depok: Fakultas Teknik Universitas Indonesia, 2022
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UI - Skripsi Membership  Universitas Indonesia Library