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The effect of four weeks restricted diet on serum soluble leptin reseptor levels and adipocyte leptin receptor density in normoweihgt rattus norvegicus rattus norvegicus strain wistar

"Salah satu mekanisme terjadinya resistensi leptin pada obesitas adalah kelainan reseptor leptin (Ob-R)."

Artikel Jurnal Universitas Indonesia Library

M. Rasjad Indra

The effect of four weeks restricted diet on serum soluble leptin receptor levels and adipocyte leptin receptor density in normoweight rattus norvegicus strain Wistar

"Salah satu mekanisme terjadinya resistemi leptin pada obesitas adalah kelainan reseptor leptin (Ob-R). Beberapa penelitian membuklikan bahwa aktifitas ikatan leptin di serum manusia berhubungan dengan reseptor leptin terlarut (soluble leptin receptor) dan restriksi asupan energi menyebabkan penurunan kadar leptin darah. Penelitian ini adalah untuk mengetahui beda kadar reseptor leptin terlarut serum dan densitas reseptor leptin dijaringan lemak adventitial aorta setelah dilakukan restriksi diet selama 4 minggu. Kadar reseptor leptin terlarut diukur dengan ELISA dan densitas reseptor leptin di jaringan lemak dengan irnunohistokimia. Kadar reseptor leptin terlarut pada kelompok perlakuan 40% diet normal lebih rendah dibanding kontrol (p=0,02). Tidak didapaikan perbedaan reseptor leptin terlarut yang bermakna antara kelompok perlakuan 40% diet normal, 1 hari puasa-1 hari makan normal dan 1 hari pitasa-2 hari makan normal. Di sisi lain, densitas reseplor leptin dijaringan lemak advenlitia aorta justru lebih tinggi pada kelompok restriksi 40% daripada kontrol. Restriksi diet 40% kalori normal harian menurunkan kadar reseptor leptin terlarut di serum, tetapi meningkatkan densitas reseptor leptin dijaringan lemak advential aorta tikus. Perubahan ini mungkin merupakan akibat mekanisme up regulation dalani mempertahankan homeostasis. (Med J Indones 2006; 15:145-50)

One of the five possible mechanisms of leptin resistance in human obesity is the defect in the leptin receptor (Ob-R). Evidence has accumulated that leptin-binding activity in human serum is related to a soluble form of the leptin receptor, and restriction of energy intake resulted a decrease in circulating leptin levels. Aim of this study is to examine the difference of serum soluble leptin receptor level and ieplin receptor density in rat adipose tissue of adventitial aorta after four weeks treated with different restricted diets. Soluble leptin receptor level was measured by ELISA and leptin receptor density by using immuno-hisfochemistry. The soluble leptin receptor in group treated with 40% of normal daily calori diet was found significantly lower than control (p = 0.02). There were no any significant differences among group treated with 40 % of normal daily calori diet, "I day fast-] day eat", and "ldayfaxt-2 days eat" groups, and among I day fast-1 day eat", "day fast - 2 days eat" and control groups as well. On the other hand, leptin receptor density in adipose tissues was higher in restricted diet group than control. Diet of 40 % normal daily calorie for 4 weeks decreased soluble leptin receptor level, but increased adipocyte leptin receptor density of the adipose tissue of rat adventitial aorta. These changes may be resulted from an up regulation mechanism in relation with homeostatic maintenance. (Med J Indones 2006; 15:145-50)"

[place of publication not identified]: Medical Journal of Indonesia, 2006

MJIN-15-3-JulySept2006-145

Artikel Jurnal Universitas Indonesia Library

Ennol Endrianto

Prediksi Jenis dan Kebutuhan Safety Sparepart pada Pembangkit Listrik Menggunakan Perspektif Logistik dan Pemeliharaan = Types and Needs of Safety Spare Parts Prediction in Power Plants Using a Logistical and Maintenance Perspective.;Ekspresi Faktor Transkripsi Oct-4 pada Fraksi Sel Punca Adipocyte-derived dan Umbilical Cord-derived = The Expression of Oct-4 Transcription Factor in Adipocyte-derived and Umbilical Cord-derived Stem Cell Fraction;Ekspresi Faktor Transkripsi Oct-4 pada Fraksi Sel Punca Adipocyte-derived dan Umbilical Cord-derived = The Expression of Oct-4 Transcription Factor in Adipocyte-derived and Umbilical Cord-derived Stem Cell Fraction

"ABSTRAK

Produktifitas pada pembangkit listrik merupakan kinerja terpenting dalam industri Operasi dan pemeliharaan, produktifitas tersebut banyak dipengaruhi oleh ketersediaan sparepart dalam rangka perawatan mesin-mesin, sehingga minimum stok safety sparepart yang harus dihitung pada saat awal tender harus benar-benar dihitung agar tidak terjadi kegagalan operasi dikarenakan tidak adanya sparepart. Tujuan paling penting dari hampir semua sistem produksi adalah mencapai kinerja optimal dengan biaya terendah sehingga ketersediaan minimum stok tidak boleh terlalu banyak dan tidak boleh terlalu sedikit. Untuk mengatasi permasalahan ini dibutuhkan estimasi jumlah dan jenis spare part yang harus dijaga. Metode yang digunakan pada penelitian ini adalah klasifikasi Multi kriteria dengan sudut pandang logistik dan juga pemeliharaan. Penelitian ini menggunakan data rekomendasi dari pabrikan sebagai initial solution berjumlah 564 item per satu lokasi pembangkit dari lima lokasi yang akan dihitung dan mengelompokkan sesuai dengan kebutuhan VED (Vital, Essential, Desireable) untuk mengetahui tingkat kekritisan yang dibagi menjadi "H" High, "M" Medium, "L" Low. Setelah mengetahui spare part apa saja yang harus disediakan sesuai dengan kekritisannya, akan dicari jumlah spare part dengan menggunakan expert judgement sebagai penentu emergency spare part. Hasil dari penelitian yang telah dilakukan didapatkan kekritisan "H" sebesar 6%, "M" sebesar 94% dan "L" sebesar 0%. Jumlah item yang direkomendasikan kurang dari rekomendasi pabrikan sebesar 52% serta penurunan biaya pencadangan safety sparepart sebesar 6%.

ABSTRACT

Productivity at the power plant is the most important performance in the operation and maintenance industry, productivity is much influenced by the availability of spare parts in the framework of maintenance of engine, so the minimum stock of safety spare parts that must be calculated at the beginning of the tender in order to avoid operation failure due to absence of spare parts. The most important goal of almost all production systems is to achieve optimal performance at the lowest cost so that the minimum availability of stock must not be too much and not too little. To overcome this problem, an estimation of the number and types of spare parts that must be maintained is needed. The method used in this study is a multi-criteria classification with a logistical perspective as well as maintenance. This study uses recommendation data from the manufacturer as an initial solution totaling 564 items per one plant location from five locations to be calculated and grouping according to the needs of VED (Vital, Essential, Desireable) to determine the level of criticality which is divided into "H" High, "M "Medium," L "Low. After knowing what spare parts must be provided in accordance with their criticality, we will look for the number of spare parts using expert judgment as a determinant of emergency spare parts. The results of the research that have been carried out obtained criticality "H" by 6%, "M" by 94% and "L" by 0%. The number of items recommended is less than the manufacturer's recommendations by 52% and a reduction in the cost of spare parts safety by 6%.;

Latar Belakang: Terapi sel punca, walaupun membuka alternatif baru terhadap tatalaksana regeneratif namun masih mempunyai hambatan dalam etik dan juga penolakan sistem imun, terutama dalam penggunaan sel punca embrionik (ESCs). Induced Pluripotent Stem Cells (iPSCs), mempunyai karakteristik yang mirip dengan ESCs namun tidak dibatasi oleh masalah etik. Gen Oct-4 mempunyai peran penting dalam mempertahankan pluripotency dan juga dalam menginduksi sel iPSCs. Kemungkinan untuk menggunakan Adipocyte-derived Stem Cells (ADSC) dan Umbilical Cord-derived Stem Cells (USC) dalam pembuatan induced Pluripotent Stem Cells (iPSCs) sangat menjanjikan dan sedang dieksplorasi. Tingkat pluripotency dari ADSC dan USC belum pernah dilakukan sebelumnya. Maka dari itu, penelitian ini bertujuan untuk membandingkan tingkat pluripotency antara dua jenis sel punca mesenkimal melalui ekspresi gen Oct-4.

Metode: Ekstraksi RNA dilakukan pada Adipocyte-derived Stem Cells, Umbilical Cord-derived Stem Cells dan Breast Cancer Stem Cells. Ekspresi relatif dari gen Oct-4 didapatkan melalui One-Step quantitative RT-PCR. Analisis statistik dilakukan menggunakan SPSS 24.0.

Hasil: ADSC mengekspresikan lebih banyak Oct-4 mRNA, sebanyak 1.68 kali, dibandingkan USC.

Kesimpulan: Walaupun USC lebih primitif dan seharusnya juga lebih pluripoten, data menunjukkan bahwa ADSC memiliki pluripotency yang lebih tinggi dari USC. Penelitian lanjutan perlu dilakukan untuk mengetahui gen pluripotency yang terlibat di pluripotency core network.

Background: Stem cell therapy, despite providing new alternative approaches to regenerative treatment still presents with problems of ethical barriers and immune rejection, especially in the use of embryonic stem cells (ESCs). The induced Pluripotent Stem Cells (iPSCs), has similar characteristics to ESCs yet is not restricted by the ethical problems. Oct-4 gene plays a crucial role in the maintenance of pluripotency and in the induction of pluripotent stem cells. The possibilities of using mesenchymal stem cells such as Adipocyte-derived Stem Cells (ADSC) and Umbilical Cord-derived Stem Cells (USC) for induced Pluripotent Stem Cells (iPSCs) are promising and still being explored. The pluripotency level of the ADSC and USC have not been conducted before. Therefore, this research aims to compare the pluripotency level between the two type of mesenchymal stem cells through the Oct-4 gene expression.

Method: Extraction of RNA was performed from Adipocyte-derived Stem Cells, Umbilical Cord-derived Stem Cells and Breast Cancer Stem Cells. The relative expression of Oct-4 gene was obtained through One-Step quantitative RT-PCR. Further statistical analysis was done using SPSS 24.0.

Results: The ADSC expressed higher levels of Oct-4 mRNA, by 1.68 times, compared to USC.

Conclusions: Although USC is more primitive and should be more pluripotent, the data suggests that ADSC has a greater pluripotency than USC. Further study is required to examine other pluripotency genes involved in the pluripotency core network.

;

Hasil: ADSC mengekspresikan lebih banyak Oct-4 mRNA, sebanyak 1.68 kali, dibandingkan USC.

Results: The ADSC expressed higher levels of Oct-4 mRNA, by 1.68 times, compared to USC.

;

Hasil: ADSC mengekspresikan lebih banyak Oct-4 mRNA, sebanyak 1.68 kali, dibandingkan USC.

Results: The ADSC expressed higher levels of Oct-4 mRNA, by 1.68 times, compared to USC.

;

Hasil: ADSC mengekspresikan lebih banyak Oct-4 mRNA, sebanyak 1.68 kali, dibandingkan USC.

Results: The ADSC expressed higher levels of Oct-4 mRNA, by 1.68 times, compared to USC.

2020

T55356

UI - Tesis Membership Universitas Indonesia Library

Simanjuntak, Cindya Klarisa

Profil Adipocyte Fatty Acid Binding Protein dan Intercellular Adhesion Molecule-1 Pada First Degree Relatives Diabetes Mellitus Tipe 2 = Adipocyte Fatty Acid Binding Protein dan Intercellular Adhesion Molecule-1 Profile in Type 2 Diabetes Mellitus First Degree Relatives

"Latar Belakang. Subjek first degree relatives (FDR) diabetes mellitus (DM) tipe 2 berisiko berkembang menjadi DM tipe 2 dan kejadian aterosklerosis lebih tinggi daripada subjek tanpa riwayat orang tua dengan DM tipe 2. Studi ini bertujuan untuk melihat perbedaaan rerata kadar Adipocyte fatty acid binding protein (A-FABP) yang berperan dalam berkembangnya DM tipe 2 maupun aterosklerosis, dan Intercellular Adhesion Molecule-1 (ICAM-1) sebagai penanda disfungsi endotel pada kelompok FDR DM tipe 2 dan kelompok non-FDR DM tipe 2. Serta melihat korelasi A-FABP dan ICAM-1 pada FDR DM tipe 2.

Metode. Penelitian ini merupakan bagian dari payung penelitian FDR tahun 2018, dengan desain potong lintang, yang memeriksakan kadar A-FABP dan ICAM-1 serum dengan metode sandwich enzyme-linked immunosorbent assay (ELISA). Subjek yang dilibatkan berusia 19 tahun sampai di bawah usia 40 tahun, yang normotensi dan normoglikemia. Serum yang diambil disimpan dalam suhu -80°C. Hasil yang ada dilanjutkan analisis beda rerata dan uji korelasi kelompok FDR dan non-FDR.

Hasil dan Diskusi. Dari 115 subjek normoglikemi normotensi, didapatkan kadar A-FABP yang lebih tinggi pada FDR DM tipe 2 dibandingkan non-FDR DM tipe 2 dengan median (rentang interkuartil) berturut-turut 5,44 ng/ml (3,99-6,40) dan 4,99 ng/ml (3,35-6,70), namun tidak bermakna secara statistik (p=0,54). Demikian juga kadar ICAM-1 pada populasi FDR DM tipe 2 yang tidak berbeda bermakna dibandingkan kelompok non-FDR DM tipe 2, dengan median 276,70 ng/ml (230,60-375,20) dan 272,55 ng/ml (223,95-318,22) berturut-turut (0=0,21). Tidak ditemukan korelasi bermakna A-FABP dan ICAM-1 pada FDR DM tipe 2 (p=0,276).

Background. The subject of first-degree relatives (FDR) diabetes mellitus (DM) type 2 had a risk of developing into type 2 DM and the incidence of atherosclerosis was higher than subjects without parents with type 2 DM. This study aims to see the mean difference of adipocyte fatty acid binding protein (A-FABP) level which plays role in the development of type 2 DM and atherosclerosis, and Intercellular Adhesion Molecule-1 (ICAM-1) level as a marker of endothelial dysfunction between FDR type 2 DM group and the non-FDR type 2 DM group. Moreover, to see the A-FABP and ICAM-1 correlation on FDR DM type 2.
Method. This study is part of FDR study held on 2018. Normotensive and normoglycemic subjects aged 19 to under 40 years old were included. The extracted serum was stored at -80C. Serum A-FABP and ICAM-1 levels were measured using the enzyme-linked immunosorbent assay (ELISA) method. The results were followed by a mean difference analysis and a correlation test for the FDR and non-FDR groups.
Results and Discussion. Of the 115 subjects, A-FABP levels were higher in FDR type 2 DM than in non-FDR type 2 DM with median (interquartile range) of 5,44 ng/ml (3,99-6,40) and 4,99 ng/ml (3,35-6,70) respectively, and not statistically significant (p=0,54). Likewise, the level of ICAM-1 in FDR type 2 DM subjects was not statistically significant different from non-FDR type 2 DM subjects, with a median of 276.70 ng / ml (230.60-375.20) and 272.55 ng / ml (223.95-318.22) respectively (0 = 0.21). There was no significant correlation between A-FABP and ICAM-1 in FDR type 2 DM (p=0,276).
Conclusion. There were no significant differences of A-FABP and ICAM-1 levels between FDR and non-FDR type 2 DM groups. There were no correlation between A-FABP and ICAM-1 in the FDR type 2 DM group."

Jakarta: Fakultas Kedokteran Universitas Indonesia, 2020

SP-pdf

UI - Tugas Akhir Universitas Indonesia Library

Sharon Hanmy Angel

Penentuan tingkat ekspresi gen Hypoxia-Inducible Factor 2-alpha di sel punca dari jaringan tali pusar dan jaringan adiposit = The Expression of Hypoxia-Inducible Factor 2-alpha from Human Umbilical Cord Tissue and Fat Tissue Derived Mesenchymal Stem Cells

"Latar Belakang: Penelitian sel induk sekarang ini telah banyak dieksplorasi untuk nilai kuratif yang menjanjikan dalam dunia medis. Minat di bidang ini dilatarbelakangi oleh kemampuan pembaharuan diri dan diferensiasi yang memberi sel induk potensi yang dapat diterapkan secara terapeutik. Sel induk embrionik sampai hari ini masih kontroversial karena masalah etika dan penghalang kekebalannya, yang mengarahkan kepada eksplorasi sumber sel induk dari sumber lainnya termasuk jaringan adiposit dan jaringan tali pusar. Sel induk berada di microenvironment yang kompleks dan berbagai penelitian telah membuktikan bahwa tingkat oksigen terbatas diperlukan untuk pemeliharaan kapasitas proliferasi dan pluripotency. Hipoksia adalah salah satu kekuatan pendorong paling berpengaruh untuk angiogenesis yang memungkinkan kelangsungan hidup sel induk melalui adaptasi metabolik dan ekspresi gen pro-survival hidup seperti Hypoxia-inducible Factors (HIFs). HIF2α mengatur ekspresi SOX2 dan NANOG dalam kondisi hipoksia, mempertahankan kapasitas proliferasi dan pluripotency sel punca. Penelitian ini bertujuan untuk menganalisis ekspresi relatif HIF2α pada sel induk dari jaringan tali pusar dan jaringan adiposit untuk menentukan tingkat kapasitas proliferasi.

Metode: Sel punca diekstraksi dari jaringan adiposit dan jaringan tali pusar. RNA diisolasi dan VarioskanTM Flash multimode Reader digunakan untuk mengkonfirmasi kemurnian sampel. One-Step qRT-PCR digunakan untuk mengukur ekspresi relatif gen HIF2α. Produk PCR lalu diproses dengan elektroforesis gel untuk mengkonfirmasi keakuratan amplifikasi gen.

Hasil: Gen HIF2α dinyatakan lebih tinggi di UCSC dibandingkan dengan ADSC.

Kesimpulan: Hasilnya menunjukkan bahwa dalam kondisi normal, UCSC memiliki pluripotency yang lebih tinggi daripada ADSC. Perluasan penelitian harus dilakukan untuk mengkonfirmasi ekspresi relatif HIF2α dalam kondisi hipoksia.

Background: Current stem cell research has been explored for promising curative value in the medical world. Interest in this field is motivated by the ability of self-renewal and differentiation that gives potential stem cells that can be applied therapeutically. Embryonic stem cells to this day are controversial because of ethical issues and their immune barriers, which lead to exploration of stem cell sources from other sources including adipocyte tissue and umbilical cord tissue. Stem cells are in a complex microenvironment and various studies have proven that limited oxygen levels are needed for maintenance of proliferation and pluripotency capacity. Hypoxia is one of the most influential driving forces for angiogenesis that allows continuity stem cell life through metabolic adaptation and expression of pro-survival living genes such as Hypoxia-inducible Factors (HIFs). HIF2α regulates the expression of SOX2 and NANOG in hypoxic conditions, maintaining the proliferation capacity and pluripotency of stem cells. This study aims to analyze the relative expression of HIF2α in stem cells from umbilical cord tissue and adipocyte tissue to determine the level of proliferation capacity.
Method: Stem cells are extracted from adipocyte tissue and umbilical cord tissue. RNA isolated and Vari PostingTM Flash multimode Reader is used to confirm sample purity. One-step qRT-PCR is used to measure the relative expression of the HIF2α gene. The PCR product is then processed with gel electrophoresis to confirm the accuracy of gene amplification.
Results: The HIF2α gene was expressed higher at UCSC compared to ADSC.
Conclusion: The results show that under normal conditions, UCSC has higher pluripotency than ADSC. Extensive research must be carried out to confirm the relative expression of HIF2α in hypoxic conditions."

Jakarta: Fakultas Kedokteran Universitas Indonesia, 2017

S-Pdf

UI - Skripsi Membership Universitas Indonesia Library

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