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AGUS ARIYANTO
PUSAT RADIOISOTOP dan RADIOFARMAKA ATOM NASIONAL (BATAN)
Biochemistry, Genetics & Molecular Biology Health Professions Medicine & Pharmacology Public Health

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Technetium-99m-Human IgG Radiopharmaceuticals: Preparation, Biodistribution and Infection Imaging in Mice WIDYASTUTI WIDJAKSANA; ANNA ROSELIANA; AGUS ARIYANTO; SRI AGUSWARINI; MARIALINA MARIALINA; GINA MONDRIDA
JURNAL ILMU KEFARMASIAN INDONESIA Vol 6 No 2 (2008): JIFI
Publisher : Fakultas Farmasi Universitas Pancasila

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Abstract

Technetium-99m-Immunoglobulin-G preparation and analysis were carried out using human immunoglobulin-G (IgG) which was conjugated with hydrazinonicotinamide (HYNIC) prior to labeling with technetium-99m (99mTc), and the HYNIC-IgG molecules were stabilized with a co-ligand, tricine. Tricine was prepared both in the form of lyophilized kits and in frozen solutions and their stabilities were compared. The effect of pH on the labeling efhciency was also studied. Characterization of native IgG as well as the radiolabeled IgG were carried out using size exclusion HPLC, whereas the labeling efficiency of 99mTc-HYNIC-IgG was determined using thin layer and paper chromatographic methods. The stability of radiolabeled 99mTc-HYNIC-IgG at room temperature as well as in human serum were investigated by observing the radiochemical purity within 4 hours in vitro. The shelf-life of Lmlabeled HYNIC-IgG stored at -40°C and tricine kits stored at 4°C were determined. Biodistribution of 99mTc- HYNIC-IgG in healthy mice and in infection-induced mice and rats were also studied. The HPLC results showed that the native and radiolabeled IgG had similar retention times, which indicated that conjugation and radiolabeling processes did not affect the integrity of the IgG molecules. The radiochemical purity of 99mTc-HYNIC-IgG was high - more than 90% - without purification step, and the preparation was stable up to 4 hours. Tricine kits prepared at pH 3 was proven to produce clear solution and high labeling yield, while pH 4 produced slight opalescence solution which turned to turbid after a few hours. Biodistribution studies in healthy mice showed an obvious uptake in liver but normal distribution in other tissues, while biodistribution in infection-induced mice showed significantly different uptake between infected tissues, i.e higher than normal tissues. Blood clearance was achieved within 2 hours and excretion via urine and faeces were observed within 24 hours. It is concluded that the preparation using human IgG showed high uptake in the infection site, and the 99mTc-HYNIC-IgG can be a promising radiopharmaceutical for infection or inflammation imaging.
Penandaan Falerin dengan Iodium-131 dan Uji Biodistribusi pada Mencit yang Diinduksi Inflamasi WIDYASTUTI WIDJAKSANA; AGUS ARIYANTO; GINA MONDRIDA; ARINA KUSUMAWARDANI; AS' ARI NAWAWI; ABDUL MUTALIB
JURNAL ILMU KEFARMASIAN INDONESIA Vol 8 No 1 (2010): JIFI
Publisher : Fakultas Farmasi Universitas Pancasila

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Phalerin is an active component of mahkota dewa (Phaleria macrocarpa (Scheff) Boerl) proven to have an anti-inflammation effect. The labeling of phalerin with gamma emitting radionuclides was aimed to study its pharmacokinetic behavior and particularly to trace its metabolites. The labeling with 131I was caried out using iodogen as oxidator. Radiolabeled compound was characterized by high performance liquid chromatography (HPLC) using C- 18 column eluted with methanol 70% and detected with UV detector (λ=291 nm) and by thin layer chromatography (TLC) using silica gel strips eluted with chloroform-methanol (9:2), and labeling efficiency was determined using the same TLC system. Purification of radiolabeled product Was carried out using size exclusion chromatography (Sephadex G-25 column) eluted with 0.05 M phosphate buffer pH 7.4. Biodistributions of 131l-phalerin in various organs of normal and inilammation-induced mice were observed at 1, 4, and 24 hours post-intravenous injection. Radiochemical purity of 131l-phalerin was 90.2 ± 2.8% and increased to 96.0 ± 0.4% after purification. Radioactivities in inflamed tissue at 1, 4, and 24 hours post-injection were respectively 1.6 times, 1.4 times, and 1.3 times higher than that in normal tissue, The results showed a significant uptake of radiolabeled phalerin in inflamed tissue.
Produksi Kit Immunoradiometricassay (IRMA) CA-125 untuk Deteksi Dini Kanker Ovarium PUJI WIDAYATI; AGUS ARIYANTO; WENING LESTARI
JURNAL ILMU KEFARMASIAN INDONESIA Vol 7 No 2 (2009): JIFI
Publisher : Fakultas Farmasi Universitas Pancasila

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Abstract

Ovarian cancer is the second highest incidence after cervix cancer, but has higher fatality level than cervix cancer. Generally, patient is known suffering ovarian cancer in very late stadium, III or IV, which is almost incurable. Cancer Would be easier to cure if detected early. In blood of ovarian cancer patient, Carbohydrate Antigen-125 (CA-125), an antigenic glycoprotein, is presence in a very low concentration initially and will increase proportionally with the level of malignancy. Therefore, early detection of ovarian cancer can be carried out by measurement of low level CA-125 in the blood. The most suitable method for the measurement is immunoradiometricassay (IRMA). Our laboratoryhas developed CA-125 IRMA kit since 2003, at first in form of CA-125 IRMA kit components that consisted of 125I-CA-125 tracer, CA-125 standard, and monoclonal antibody-coated tubes. We then made assay optimization of the IRMA CA-125 kit which gave B/T value of 19.05%, NSB value of 0.53% and Working area of 0 to 200 mIU/mL. Our further Works on validation of IRMA CA-125 kit using high and low concentration quality control (QCH and QCL) showed an intra assay (n=15) CV value of 9.9% for QCL and 2.97% for QCH, While inter assay (n=7) CV value of 13.1% and 4.9% for QCL and QCH respectively. The results comply with the IAEA protocol requirement.
Co-Authors ABDUL MUTALIB ANNA ROSELIANA ARINA KUSUMAWARDANI AS' ARI NAWAWI GINA MONDRIDA MARIALINA MARIALINA PUJI WIDAYATI SRI AGUSWARINI WENING LESTARI WIDYASTUTI WIDJAKSANA