Widyastuti Widjaksana
Pusat Pengembangan Radioisotop dan Radiofarmaka, BATAN, Serpong.

Published : 12 Documents
Articles

Found 12 Documents
Search

Preparasi dan Uji Biodistribusi Sediaan 153Sm--Mikrosfer Albumin Untuk Senovektomi Radiasi Widjaksana, Widyastuti; Tamat, Swasono R.; Sardjoko, Sardjoko; Indrawati, Teti; Fatimah, Fatimah; Auliya, Anna
Jurnal Radioisotop dan Radiofarmaka Vol 6, No 1 (2003): Jurnal PRR 2003
Publisher : Jurnal Radioisotop dan Radiofarmaka

Show Abstract | Original Source | Check in Google Scholar | Full PDF (11889.697 KB)

Abstract

PREPARASI DAN UJI BIODISTRmUSI SEDIAANS
STABILITAS DAN UJI PRAKLINIS 99m Tc-EC UNTUK RADIOFARMAKA PENATAH FUNGSI GINJAL Astuti, Laksmi Andri; Lestiyowati, Sri Aguswarini; Karyadi, Karyadi; Setiyowati, Sri; Yunilda, Yunilda; Widjaksana, Widyastuti
Jurnal Radioisotop dan Radiofarmaka Vol 16, No 1 (2013): JURNAL PRR 2013
Publisher : Jurnal Radioisotop dan Radiofarmaka

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1237.604 KB)

Abstract

ABSTRAKSTABILITAS DAN UJI PRAKLINIS99mTc-EC  UNTUK RADIOFARMAKA  PENATAH  FUNGSIGINJAL.Radiofarmaka telah menunjukkan manfaat yang nyata dan spesifik dalam pelayanan kesehatanterutama untuk diagnosis  antara lain untuk diagnosis fungsi ginjal. Saat ini telah dilakukan  preparasi99mTcEC untuk penatah fungsi ginjal melalui beberapa tahapan, yaitu: karakterisasi EC (Ethylene-dicysteine)dengan FT-IR dan pengujian titik leleh, formulasi kit  EC,   penandaan kit basah EC dengan99mTc dilakukandengan menambahkan99mTc perteknetat dari generator99Mo/99mTc. Hasil penandaan dianalisis denganmenggunakan  kromatografi kertas,  sedangkan uji stabilitas kit basah EC dilakukan untuk menentukanwaktu kadaluwarsanya, uji biodistribusi menggunakan hewan percobaan mencit dan pencitraan dengankamera Gamma dengan tikus Wistar. Hasil analisis dengan FT-IR menunjukkan bahwa EC yang akandigunakan sudah  memenuhi persyaratan untuk digunakan formulasi, Uji stabilitas untuk sediaan yang belumdilabel menunjukkan sediaan masih stabil sampai 5 bulan. Pengujian kestabilan99mTc-EC pada suhu kamarmenunjukkan kemurnian radiokimia masih stabil sampai 4 jam setelah penandaan, hasil uji biodistribusidengan hewan percobaan mencit menunjukkan cacahan tertinggi pada kandung kemih sedangkan pencitraandengan Kamera Gamma menunjukkan hasil pencitraan yang cukup jelas di area ginjalKata kunci : radiofarmaka,99mTc, EC (Ethylene-dicysteine ), diagnosis,fungsi ginjal.ABSTRACTSTABILITY AND PRECLINICAL TESTS OF99mTc-EC  RADIOPHARMACEUTICALS  FORRENAL FUNCTION  IMAGING.Radiopharmaceuticals have shown a real and spesific usefulness inmedical services, especially for diagnosis  of several  diseases such as renal function imaging. Preparation of99mTc-EC  and its analysis have been carried out. The preparation consisted of several steps, characterizationof EC with FT-IR, formulation of EC kit, labeling of EC with99mTc followed by radiochemical purity testingusing paper chromatography. Stability test of EC kit is to know The expired date has been carried out.Biodistribution test on normal mice was carried out while imaging in wistar rat using gamma camera TheFT-IR and melting point analysis results showed that EC can be  used for formulation of EC kit. Theradiochemical purity of99mTc-EC is analysed with paper chromatography with the result is  higher than 95%.  The stability test showed that  EC kit was stable until 5 months and the  labeled EC at room temperaturewas stable after  4  hour incubation post labeling, biodistribution test on mice showed higher uptake inbladder,while imaging with gamma camera showed quite clearly in the kidney area.Key words: radiopharmaceutical,99mTc, EC(Ethylene-dicysteine ), diagnosis, renal function
UJI BIODISTRIBUSI DAN UJI PREKLINIS MIKROSFER GELAS-P-32 UNTUK PENGOBATAN KANKER Astuti, Laksmi Andri; Caniago, Djoharly; Pardede, Ratlan; Widjaksana, Widyastuti; Purwoko, Purwoko; Bagiawati, Sri; Setiyowati, Sri; Abidin, Abidin; Aguswarini, Sri
Jurnal Radioisotop dan Radiofarmaka Vol 6, No 2 (2003): Jurnal PRR 2003
Publisher : Jurnal Radioisotop dan Radiofarmaka

Show Abstract | Original Source | Check in Google Scholar | Full PDF (2363.751 KB)

Abstract

ABSTRAKUJI BIODISTRIBUSI DAN UJI PREKLINIS MIKROSFER GELAS-P-32 UNTUK PENGOBATAN KANKER.Radiofarmaka telah  menunjukkan  manfaat lebih unggul dan spesiflk biladibandingkan dengan teknik pelayanan kesehatan lain, terutama untuk keperIuan diagnosis dan terapi beberapa penyakit  mematikan seperti kanker. Mikrosfer gelas-P-32 ( P-32 GMS ) adalah  salah  satu sediaan  baru  radiofarmaka untuk terapi  dengan cara  radiasi  interna beberapa penyakit  kanker ganas  seperti  penyakit  kanker  hati. Mikrosfer  gelas-P-32 ini  disiapkan  dengan  cara  mengira diasikan mikrosfer gelas-P31dengan neutron di reaktor nuklir, kemudian sediaan disuntikkan ke daerah yang terkena kanker Untukmemudahkan  penyuntikan  pada  sediaan  ini  perlu ditambahkan larutan pensuspensi, yaitu campuran dari PVP 16 %, dekstrose 50% dan salin. Mengingat ukuran mikrosfer ini spesiflk yaitu 40-60 J.Ull  maka pemilihan jamm suntik perIu dilakukan agar P-32 GMS yang diinjeksikan maksirnal bisa masuk ke daerah sasaran, dan mikrosfer tidak mengalami kerusakan karena gesekan dengan permukaan dalam  jarum. Ujibiodistribusi perIu dilakukan untuk melihat apakah P-32 GMS yang telah diinjeksikan terak1.lmulasike daerah penyuntikan  atau  terdistribusi  ke organ - organ lain yang  tidak dikehendaki, Hewan percobaan yang dipakai  adalah  mencit dengan penyuntikan dilakukan  pada otot  paha  kanan. Hasil biodistribusi pada I, 3dan  24 jam  setelah  injeksi  menunjukkan 100% aktivitas P-32 GMS terakumulasi di daerah penyuntikan.Hasil biodistribusi pada 5 jam setelah penyuntikan menunjukkan adanya penimbunan  aktivitas di organ lambung selain penimbunan aktivitas di daerah penyuntikan, namun hal ini diduga karena terjadi kontaminasi akibat kesalahan kerja .Kata Kunci : Radiofarmaka, , Mikrosfer gelas, P-32,  iradiasi, uji biodistribusi , kanker. ABSTRACTBIODISTRIBUTION AND PRECLINICAL TEST OF P-32 GLASS MICROSPHERESFOR CANCER THERAPY. The superiority of  radiophannaceutical compare to the  other  techniques off medical services, especially for diagnosis and  therapy  of  several deadly diseases such as cancer, shows that this technique is more specific and accurate. P-32-Glass microsphere (P-32 GMS) is one of theradiophannaceuticals developed reccntly for therapy using  interrnal  radiation  method  for several malignant cancers, such as hepatic canccr. 111cP-32 GMS was prcpared by irradiating P-31 GMS with neutron at a nuclear reactor, then the preparation was injected to the cancerous infected  area. To make easy  injection, it needs suspension agent that was including PVP, dextrose and saline with a composition of 16% PVP - 50%dextrose - saline as 2 : 3 : 3 (v/v/v). As microsphere size should be maintained at 40-60 11m, the injectionneedle was selected properly in order to remain the particle size of P-32 GMS unchanged  when  the frictionoccurs between microspheres and the inside surfaces of the needle. The injection  needle  used  was needle produced  by BD with a typical size of 20 GI Tw. Biodistribution  studies were carried out after I, 3, 5 and24 hour of injection. Experimental results  for 1, 3 and 24 hour post -injection studies showed  that 100%activity of  P-32 GMS was accumulated  at  the  injected  area. For 5 hour post-injection study, accumulation of  P-32 GMS activity was also found at stomach besides the injected area, but it was presured as working error. Keywords: Radiophannaceutical , glass microspheres ,P-32,  biodistribution, , cancer.    
PREPARASI RADIOFARMAKA 99mTc-DTPA-INH UNTUK DIAGNOSIS TUBERKULOSIS Astuti, Laksmi Andri; Setyowati, Sri; Triningsih, Triningsih; Maskur, Maskur; Widjaksana, Widyastuti
Jurnal Radioisotop dan Radiofarmaka Vol 14, No 1 (2011): Jurnal PRR 2011
Publisher : Jurnal Radioisotop dan Radiofarmaka

Show Abstract | Original Source | Check in Google Scholar | Full PDF (3360.578 KB)

Abstract

ABSTRAKPREPARASI RADIOFARMAKA 99mTc__DTPA_INH UNTUK DIAGNOSIS TUBERKULOSIS.Radiofarmaka telah menunjukkan manfaat yang nyata dan spesifik dalam pelayanan kesehatan terutama untuk diagnosis dan terapi antara lain untuk penyakit kanker dan infeksi. Salah satu cara. menangani banyaknya kasus tuberkulosis yang banyak terdapat di Indonesia, teknik kedokteran nuklir menggunakan radiofarmaka diethylenefriaminepenfaacetic acid-isonicotinic acid hydrazide (DTP A-INH) yang yang ditandai dengan teknesium-99m dapat dipakai salah satu metoda altematif untuk diagnosis tuberkulosis. Saat ini telah dilakukan preparasi 99mTc_DTP A-INH, 991~C_DTPA-INH dilakukan melalui beberapa tahapan yaitu: konyugasi DTPA-INH dan analisis hasil konyugasi dengan HPLC kolom C-18. Penandaan DTP A-INH dengan Tc-99m dilakukan dengan menambahkan SnClz sebagai reduktor dan larutan 99mTcperteknetat dan generator 99Mo;99mTc.Hasil penandaan dianalisis dengan menggunakan kromatografi kertas dan kromatografi lapis tipis, sedangkan stabilitas DTP A-INH dilakukan untuk menentukan waktu kadaluwarsanya. Hasil analisi dengan HPLC menggunakan kolom C-18 menunjukkan telah terjadi konyugasi antara DTPA dengan INH, sedangkan analisis dengan kromatografi kertas dan kromatografi lapis tipis menunjukkan kemurnian radiokimia lebih besar dari 90 % dan hasil pelabelan terbaik didapatkan pada penambahan SnClz sebanyak 200 ).lg. Hasil uji stabilitas untuk sediaan yang belum dilabel, menunjukkan sediaan masih stabil pada minggu ke 13. Pengujian kestabilan 99mTc_DTPA-INH pada suhu kamar menunjukkan kemurnian radiokimia masih stabil sampai 3 jam setelah penandaan. Kata kunci : radiofarmaka, Tc-99m, DTP A, INH, diagnosis, tuberkulosis. ABSTRACT PREPARATION OF 99mTc-DTPA-INH RADIO PHARMACEUTICALS FOR TUBERCULOSIS DIAGNOSIS. Radiopharmaceuticals have shown a real and spesifik usefulness in medical services, especially for diagnosis and therapy of several deadly diseases such as cancer and infection. To handle Tubeculosis which is common in Indonesia, nuclear medicine teclmiques which uses DTPA-INH radiophannaceutical labeled with technetium-99m offer an alternative method for tuberculosis 99m diagnosis. Preparation of Tc-DTP A-INH and its analysis have been carried out. The preparation consisted 99111 of several steps, conjugation of DTPA with INH and the conjugated DTPA-INH was labeled with Tc, 99m followed by C-18 HPLC analysis. Radiochemical purity of Tc-DTP A-INH was ana lysed using TLC/paper chromatography. Stability test of DTP A-INH to know the expiry date was carried out. The HPLC result showed that the conjugated DTP A-INH has been formed. The radiochemical purity of 99mTc_TPA-INH analysed with TLC/paper chromatography was obtained at higher than 90 %. Best result was obtained by addition of 200 ).lgram of SnClz. The stability test showed that DTP A-INH was stable until 13 weeks and thestability of labeled DTP A-INH at room temperature was stable after 3 hours incubation post labeling. Key words: radiophannaceutical, Tc-99m, DTP A, INH, diagnosis, tuberculosis    
VALIDASI METODE PEMBUATAN DAN KENDALl MUTU KIT UBIQUICIDINE UNTUK DETEKSI INFEKSI Widjaksana, Widyastuti; Roseliana, Anna; Lestari, Enny; Tahyan, Yayan; Setyowati, Sri; Humani, Titis Sekar; Kartamihardja, Hussein S
Jurnal Radioisotop dan Radiofarmaka Vol 12 (2009): JurnaL PRR 2009
Publisher : Jurnal Radioisotop dan Radiofarmaka

Show Abstract | Original Source | Check in Google Scholar | Full PDF (3590.876 KB)

Abstract

ABSTRAK VALIDASI  METODE  PEMBUATAN  DAN  KENDALl  MUTU  KIT UBIQUICIDINE  UNTUK  DETEKSI INFEKSI. Telah dilakukan pembuatan dan uji mutu radiofarmaka Ubiquicidine 29-41 (UBI 2941)untuk ditandai dengan teknesium 99mTcyang akan digunakan untuk preparat diagnosis infeksi bakteriGram posistif dan jamur. Kit kering UBI telah dibuat secara aseptis dan dianalisis kemumian radiokimia, sterilitas dan apirogenitasnya. HasH penandaan UBI dengan 99mTcdianalisis dengan kromatografi lapis tipis dan kromatografi kertas menggunakan ITLC-SG dengan eluen campuran dapar ammonium asetat 0.1 M 5.2 - metanol (1: I) serta kertas Whatman-l dengan e1uen aseton, sedangkan uji sterilitasnya dilakukan menggunakan medium perbenihan cair Fluid Thioglycolate (FTG) dan Trypton Soy Broth (TSB). Uji in vivo pada hewan percobaan dilakukan pada mencit normal dan yang diinduksi infeksi, sedangkan uji klinis pendahuluan dilakukan pada 5 orang relawan di RS. Hasan Sadikin Bandung dan RSPAD Gatot Soebroto Jakarta yang I orang diantaranya mewakili pasien sehat, dan waktu pengamatan dilakukan pada I jam dan 2 jam setelah penyuntikan dengan 99mTc_UBI.Hasil percobaan menunjukkan efisiensi penandaan sebesar 99,34%, uji sterilitas menunjukkan tidak terjadi pertumbuhan mikroba dalam media uji, uji pirogenitas tidak menunjukkan kenaikan temperatur yang berarti pada kelinci percobaan dan stabilitas kit kering UBI pada penyimpanan di suhu 4°C tidak berubah hingga 12 bulan pengamatan. Biodistribusi pada mencit normal menunjukkan akumulasi radioaktivitas pada ginjal dan kandung kemih, sedangkan pad a mencit yang diinfeksi terlihat adanya penangkapan yang signifikan pada jaringan yang mengalami infeksi (paha kanan) dibandingkan jaringan yang sehat (paha kiri). Studi pendahuluan pada pasien normal menunjukkan akumulasi radioaktivitas pad a ginjal dan kandung kemih sedangkan pada pasien dengan gejala diare maupun hemoroid terlihat juga adanya penangkapan yang signifikan pada usus dan penangkapan radioaktivitas terse but terlihilt lebih jelas setelah 2 jam. Telah dibuktikan pula kespesifikan dalam pencitraan infeksi bakteri dibandingkan dengan non bakteri (amuba). Hal ini menunjukkan bahwa radiofarmaka 99mTc-Ubiquicidine 29-41 dapat digunakan untuk mendeteksi adanya infeksi secara umum dalam tubuh menggunakan kamera gama dengan waktu pencitraan optimal 2 jam sekaligus juga dapat membedakan antara infeksi yang disebabkan oleh bakteri dan non bakteri. Kata kunci: 99mTc,penandaan, Ubiquicidine, biodistribusi, infeksi ABSTRACT VALIDATION OF PREPARATION AND QUALITY CONTROL METHODS OF UBIQUICIDINE KIT TO BE USED AS INFECTION IMAGING AGENT. Preparation and Quality Control of Ubiquicidine 29-41 (UBI 29-41) to be labelled with 99mTchave been carried out and will be prepared as infection imaging agent specifically for Gram positive bacteria-and fungi. Lyophilised UBI kits was prepared aseptically and analysed for its sterility, apyrogenicity and radiochemical purity. Labeling efficiency of UBI was analysed by thin layer chromatography using ITLC-SG with ammonium acetate 0.1 M pH 5.2-methanol (1: I) as eluants and paper chromatography using Whatman-I paper with acetone as eluant, and its sterility was assesed using bacterial and fungal culture media, i.e fluid thioglycolate (FTG)and trypton soy broth (TSB). In vivo study was carried out in normal mice and infection induced mice, whereas initial clinical study was carried out on 5 volunteers at Hasan Sadikin General Hospital and Gatot Soebroto Army Hospital, which 1 of them represents normal patient. The images were taken I hour and 2 hours post administration. QC results showed labelling efficiency of UBI of 99.34%, no microorganisms growth in culture media, no significant increase in temperature of experimental rabbits and the stability of unlabeled UBI kits during storage at 4°C was unchanged up to 12 months. Biodistribution study in normal mice showed high accumulation in kidneys and bladder, whereas in infected mice higher uptake was alsoobserved in infected area (right thigh) rather than in uninfected one (left thigh). Initial clinical study in normal patient showed high accumulation of radioactivity in kidneys and bladder whereas in 2 patients with symptoms of diarrhoea and haemorroid respectively the uptake was also seen in colon which increased after 2 hours. Uptake of radioactivity was also seen in patient with spondy litis TB but none in patient with amoebic infection who was previously proven infected using other modality. From this experiment it can be concluded that Ubiquicidine 29-41 labeled with 99mTccan be used as infection imaging agent using gamma camera with optimum scanning time of 2 hours post injection and enable to differentiate between bacterial infection and amoebic infection.Keywords: 99mTc,labeling, Ubiquicidine, biodistribution, infection
PREPARASI DAN UJI BIODlSTRlBUSI RENIUM-186-ETlLEN DISISTEIN (186Re-EC) SEBAGAI PREPARAT ENDOVASCULAR BRACHYTHERAPY Widjaksana, Widyastuti; Rustendi, Cecep Taufik; Sovilawati, Evi
Jurnal Radioisotop dan Radiofarmaka Vol 7, No 1 (2004): Jurnal PRR 2004
Publisher : Jurnal Radioisotop dan Radiofarmaka

Show Abstract | Original Source | Check in Google Scholar | Full PDF (3505.592 KB)

Abstract

ABSTRAK PREPARASI DAN UJI BIODlSTRlBUSI RENIUM-186-ETlLEN DISISTEIN (186Re-EC) SEBAGAI  PREPARAT  ENDOVASCULAR  BRACHYTHERAPY Kasus restenosis atau penyempitan kembali pembuluh arteri jantung paska proses angioplaslybanyak terjadi dan dapat mengakibatkan masalah yang serius. Salah satu cara penanggulangan-nya ialah dengan metoda endovascular brachyfherapy yaitu pembalonan bagian sempit arteri jantung dikombinasi dengan radiasi interna menggunakan scnyawa 186Re-EC dimana radiasi β- yang dipancarkan akan menghancurkan sel sel hyperplasia yang terbentuk didalam pembuluh arteri yang mengakibatkan penyumbatan pembuluh tersebut. Telah dilakukan serangkaian per-cobaan  untuk  mencari kondisi optimum penandaan 186 Re-EC, penambahan asam askorbat sebagai anti oksidan, dan pengaturan pH menjadi pH netral setelah pembentukan 186Re-EC untuk  menyesuaikan dengan pH tubuh sehingga  dapat diperoleh senyawa kompleks yang stabil dengan kemumian radiokimia yang tinggi. Uji biodistribusi pada hewan percobaan telah pula dilakukan untuk melihat sifat farmakokinetika sediaan bertanda inij Hasil percobaan menunjuk- kan bahwa waktu inkubasi 15 menit pada suhu ruangan sudah cukup untuk memreroleh kompleks 186Re_ skorbat dalam jumlah setara dengan reduktor yang digunakan dapat meningkatkan kestabilan kompleks 186Re_EC. Perubahan pH dari pH reaksi kompleksasi (pH 2) hingga pH netral tidak memf.engaruhi kestabilan kompleks 186Re_EC, sehingga untuk keamanan pasien pada saat pemakaian sediaan 186Re-EC dapat diatur pada pH 6 - 7. Pengujian pada mencit sehat menunjuk-kan akumulasi radioaktif yang tinggi pada ginjal dan kandung kemih, hal ini menun-jukkan sifat farmakokinetik sesuai dengan yang diharapkan. Hasil formula terbaik186Re-EC adalah terdiri dari 4 mg etilen disistein (EC) dalam dapar natrium bikarbont 0.5 M, 2 mg timah klorida dihidrat, 2 mg asam askorbat dan 100 µg perenat, dan stabil selama lebih dari sa~ minggu pada pH 6-7. Kata kunci : Radiofarmaka, etilen disistein, I Renium-186 (86Re), endovascular brachytherapy, penandaan, 186Re_EC. ABSTRACT. PREPARATION AND BIODITRIBUTION OF RHENIUM-186-ETHYLENE DICYSTEINE 186Re-EC) FOR ENDOVASCULA R BRACHYTHERAPY. Restenosis or renarrowing of coronary artery following angioplasty procedur is common- ly occurred and causes serious problem.Endovascular brachytherapy, - a balloonisation procedure into the narrowing cononary artery combined with internal radiation - using 186Re-EC is an alternativ method to solve this problem from which β radiation will destroy hyperplasia cells built up in the vessel walls t at cause blockage. Experiments to obtain optimal condition of labeling I86Re-EC, such as variation of incubation time, addition of ascorbic acid as an antioxidant and pH adjustment to neutral of the final olution have been carried out in order to get a radio labeled compound with high radiochemical purity a d stability. Biodistribution in experimental animal has also been carried out to see its pharmacokinetic behav our. The results showed that incubation time of 15 minutes at room temperature is sufficient to form 186Re- C complex with high radiochemical purity (more than 85%). The addition of an equivalent amount of ascor ic acid to the reducing agent used can increase the stability of the 186Re-EC complex. The pH adjustment rom acidic to neutral did not affect the stability, therefore to avoid irritation at the time of administration the pH of the solution could be adjusted to 6-7. Administration to normal mice showed high accum lation in kidney and bladder, revealed good pharmacokinetic behaviour of this labeled compound. T e results showed that 186Re-ECpreparation can be formulated using 4 mg of etiylene dicysteine (EC) dissol ed in sodium bicarbonate buffer 0.5 M, 2 mg of stannous chloride dihydrate, 2 mg of ascorbic acid and 10 Ilg of perrhenate, stable more than a week at pH 6-7. Keywords: Radiopharmaceuticals, ethylene dicysteine, Rhenium-186 (186Re), endovascular brachytherapy, labeling, I86Re-EC.  
SINTESIS DAN KARAKTERISASI KONYUGAT DENDRIMER PAMAM G4-NIMOTUZUMAB Gunawan, Adang Hardi; Widjaksana, Widyastuti; Paune, Lucky A.
Jurnal Radioisotop dan Radiofarmaka Vol 18, No 1 (2015): JURNAL PTRR 2015
Publisher : Jurnal Radioisotop dan Radiofarmaka

Show Abstract | Original Source | Check in Google Scholar | Full PDF (3488.1 KB)

Abstract

Dendrimer Poliamidoamin (PAMAM) merupakan suatu senyawa polimer globular yang dapat digunakan untuk membawa obat/senyawa ke organ, jaringan, tumor atau kanker. Nimotuzumab merupakan antibodi monoklonal yang sangat spesifik dapat mengenali domain eksternal epidermal growth factor receptor (EGFR). Pengkonyugasian dendrimer PAMAM dengan antibodi monoklonal Nimotuzumab sebagai homing device akan menghasilkan suatu sistem pembawa obat yang tertarget pada EGFR sehingga dapat mengurangi efek samping yang tidak diinginkan. Pada penelitian ini, Nimotuzumab diaktivasi dengan NaIO. dengan rasio 1:1, lalu dimurnikan dengan menggunakan ultrafiltrasi sentrifugasi dan dikarakterisasi dengan spektrofotometer UV (Ultra Violet) dan Fourier Transform Infra Red (FTIR). Hasil aktivasi Nimotuzumab (CHO-Nimotuzumab) dikonjugasikan dengan dendrimer PAMAM G4 dengan rasio mol 1:4, kemudian dimurnikan menggunakan ultrafiltrasi sentrifugasi. Konyugat dendrimer PAMAM G4-Nimotuzumab dikarakterisasi dengan menggunakan spektrofotometer UV, Kromatografi Cair Kinerja Tinggi (KCKT), Particle Size Analyzer (PSA) dan elektroforesis gel Sodium· Dodecyl SulphatePolyacrilamide Gel Electrophoresis (SDS) page. Hasil karakterisasi CHO-Nimotuzumab menunjukkan bahwa gugus diol pad a Nimotuzumab telah berhasil dioksidasi menjadi gugus aldehid. Dan hasil karakterisasi konjugat dendrimer PAMAM G4Nimotuzumab menunjukkan bahwa konyugat dendrimer PAMAM G4-Nimotuzumab telah berhasil dibuat dan dimurnikan dengan ukuran partikel rata-rata 12,29 nm. Polyamidoamine dendrimer( PAMAM ) is a globular polymer compound that can be used to carry drugs / compounds to organ, tissue, tumor or cancer. Nimotuzumab  is  a specific  monoclonal  antibody  which  can recognize  the   externa   domain  of   epidermal   growth   factor  receptor ( EGFR).Conjugation of PAMAM dendrimer with Nimotuzumab monoclonal antibody as a homing device will produce a drugs targeted carrier system on EGFRin order to reduce unwanted side effects. In this study, Nimotuzumab was activated with NaIO. with ratio mole of 1:1, which then purified using ultrafiltration centrifugation and characterized by UV (Ultra violet) and Fourier Transform Infra Red(FTIR) spectrophotometer. CHO-Nimotuzumab as a results an  activation of Nimotuzumab, was then conjugated   to G4 PAMAM  dendrimer with  mole  ratio of 1:4 , and  then purified  using  ultrafiltration centrifugation. G4 PAMAM dendrimer - Nimotuzumab conjugates characterized using UV spectrophotometer, High Performance Liquid Chromatography (HPLC) , Particle Size Analyzer (PSA) and Sodium Dodecyl Sulphate Polyacrilamide Gel Electrophoresis (SDS) page gel electrophoresis. Characterization results of CHO-Nimotuzumab indicated that diol groups on Nimotuzumab has been successfully oxidized to aldehyde. Characterization results of the PAMAM dendrimer G4Nimotuzumab conjugate indicated that PAMAM G4 - Nimotuzumab has been successfully synthesized and purified with an average particle size of 12.29 nm.    
Dependence of Technetium-99m Radioactivity on the Stability of Tc-99m Tetrofosmin as Injectable Radiopharmaceuticals Widjaksana, Widyastuti; Widayati, Puji; Alwi, Yunilda; N, Lindawati
The Journal of Pure and Applied Chemistry Research Vol 7, No 2 (2018): Edition May-August 2018
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Original Source | Check in Google Scholar

Abstract

Technetium-99m (Tc-99m) labeled tetrofosmin kit has been widely used in hospitals including in Indonesia. Usually, tetrofosmin kits and Tc-99m pertechnetate are supplied separately, but recently there has been a new trend where Tc-99m tetrofosmin is supplied in the form of the ready-to-inject product. To prepare such a product it has to be proven that tetrofosmin can be labeled with high activity of Tc-99m and the resulted Tc-99m tetrofosmin, remains stable within shipping time until being used in hospitals. In this investigation, locally produced tetrofosmin kits were labeled with various radioactivity of Tc-99m ranging from 150 mCi to 400 mCi, their radiolabeling yields or radiochemical purity was analyzed using SepPak C18 column, and the radiochemical stability was assessed within 30 hours. The worst storage condition was also studied by analyzing its radiochemical purity after being stored at extreme temperatures for several hours. The results showed that tetrofosmin kit can be highly labeled with up to 415 mCi of Tc-99m, and stable up to 30 hours in room temperature, and there is a tendency that higher radioactivity leads to more decreasing in radiochemical purity. Stability study in extreme temperatures showed that the product can withstand its stability within 6 hours in 40°C, but it decreased rapidly to less than 70% within 1 hour when stored in 50°C. It concludes that the quality of Tc-99m tetrofosmin as an injectable radiopharmaceutical can be maintained during transportation by storing it at cool temperature.
PREPARATION OF 99mTc-TRICINE-EDDA-HYNIC-FOLATE, A POTENTIAL RADIOPHARMACEUTICAL FOR RADIODIAGNOSIS OF FOLATE RECEPTORS OVER EXPRESSED CANCER Ramli, Martalena; Ritawidya, Rien; Rustendi, Cecep Taufik; Humani, Titis Sekar; Widjaksana, Widyastuti
Jurnal Sains Materi Indonesia Vol 15, No 1: OKTOBER 2013
Publisher : BATAN

Show Abstract | Original Source | Check in Google Scholar | Full PDF (381.26 KB)

Abstract

PREPARATION OF 99mTc-TRICINE-EDDA-HYNIC-FOLATE, A POTENTIAL RADIOPHARMACEUTICAL FOR RADIODIAGNOSIS OF FOLATE RECEPTORS OVER EXPRESSED CANCER. Folate receptors (FRs) have been reported to be over expressed on various types of cancers. Therefore, it would be possible for its ligand in this case folic acid, also known as vitamin B9, to be used as delivery agent for diagnosis and therapy of FRs over expressed cancers. The aim of this projectwas to prepare 99mTc radiolabeled folic acid via 6-hydrazinonicotinamido-hydrazido (HYNIC) in the form of 99mTc-tricine-ethylenediamine diacetate-HYNIC-folate (99mTc-tricine-EDDA-HYNIC-folate), which was expected to be potential for radiodiagnosis of the FRs over expressed cancers. Preparation of 99mTc-tricine-EDDA-HYNIC-folate was initiated by preparation of HYNIC-folate by reacting of folate-γ- hydrazide with 6-chloronicotinic acid NHS ester which was then followed by addition of hydrazine-hydrate. The HYNIC-folate was recovered in its HCl salt-form which was then formulated to form a freeze dried kit which consisted of HYNIC-folate, tricine and EDDA (co-ligands) and Sn(II) as reducing agent. The formation of 99mTc-tricine-EDDA-HYNIC-folate was carried out by addition of 99mTc into tricine-EDDA-HYNIC-folate freeze dried kit which resulted in 99mTc-tricine-EDDA-HYNIC-folate with radiochemical purity of 97.0 ± 1.8% met with the requirement of a good radiopharmaceutical (≥ 90%). The stability test showed that the 99mTc-tricine-EDDA-HYNIC-folate was still intact (radiochemical purity ~ 95%) when stored at 37 °C for four hours.
Technetium-99m-Human IgG Radiopharmaceuticals: Preparation, Biodistribution and Infection Imaging in Mice WIDJAKSANA, WIDYASTUTI; ROSELIANA, ANNA; ARIYANTO, AGUS; AGUSWARINI, SRI; MARIALINA, MARIALINA; MONDRIDA, GINA
JURNAL ILMU KEFARMASIAN INDONESIA Vol 6 No 2 (2008): JIFI
Publisher : Fakultas Farmasi Universitas Indonesia

Show Abstract | Original Source | Check in Google Scholar

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.