Judul: Detection of Beta-Amyloid 42 as a Marker of Alzheimer's Disease Using the IPB In-house ELISA Kit
Abstrak: Protein amiloid beta 42 (Aß42) merupakan penanda biologis (biomarker) penyakit Alzheimer yang dapat dideteksi menggunakan kit ELISA. Penelitian ini bertujuan untuk mengetahui performa kit ELISA Aß42 inhouse di level serum dibandingkan dengan kit komersial. Penelitian ini dimaksudkan bermanfaat dalam mendeteksi dini penyakit Alzheimer dan pengembangan penelitian menggunakan kit ELISA inhouse IPB-PSSP. Penelitian ini menggunakan 18 sampel serum manusia yang dibagi menjadi 3 kelompok usia: kelompok 1 (20 – 30 tahun), kelompok 2 (30 – 40 tahun), dan kelompok 3 (> 40 tahun). Nilai OD antar kelompok dan antar kit dibandingkan rata-rata serta standar deviasinya. Hasil pengujian kit ELISA Aß42 inhouse memiliki performa yang mendekati kit ELISA komersial., Amyloid beta 42 (Aß42) protein is a biological marker (biomarker) of Alzheimer's disease that can be detected using an ELISA kit. This study aims to determine the performance of the in-house Aß42 ELISA kit at the serum level compared to the commercial kit. This research is intended to be beneficial for the early detection of Alzheimer's disease and for the development of research using the IPB-PSSP in-house ELISA kit. This study used 18 human serum samples divided into 3 age groups: group 1 (20-30 years), group 2 (30-40 years), and group 3 (> 40 years). The OD values between groups and between kits were compared using the average and standard deviation. The results of testing the in-house Aß42 ELISA kit show performance that is close to the commercial ELISA kit.
Keyword: alzheimer, ELISA

Judul: Study of Amyloidopathy on Mice Liver after Immunization of Amyloid Beta 42 (Aβ42) as a Marker of Alzheimer's Disease
Abstrak: Peptida amiloid beta 42 (Aβ42) dikenal sebagai biomarker dini penyakit Alzheimer. Antibodi Aβ42 menjadi bahan antibodi spesifik atau antibodi monoklonal yang dapat dijadikan kit diagnostik penyakit Alzheimer berbasis ELISA. Antibodi diproduksi di hewan mencit melalui teknik imunisasi amiloid sehingga didapatkan antibodi monoklonal dari organ limpa pada mencit. Studi ini dilakukan untuk mempelajari amyloidopathy pada organ hati mencit pascaimunisasi antibodi amiloid beta 42 (Aβ42) sebagai marka penyakit Alzheimer. Studi ini menggunakan 20 ekor mencit lalu dibagi menjadi dua kelompok. Kelompok yang diimunisasi dengan Aβ42 dan kelompok kontrol. Mencit perlakuan diberikan vaksin dengan titer 15.000pg/mL dan diinjeksikan 100l/ekor melalui rute subkutan. Pengamatan histopatologi organ hati menggunakan pewarnaan Hematoksilin Eosin. Temuan lesio dianalisis menggunakan analisis deskriptif dan semikuantitatif tipe ordinal. Hasil pengamatan menunjukkan bahwa terdapat lesio infiltrasi sel radang dan nekrosis pada mencit perlakuan. Hasil pengamatan studi ini diharapkan dapat melengkapi informasi terkait efek dari imunisasi Aβ42 terhadap organ hati mencit sebagai hewan model., Amyloid peptide beta 42 (Aβ42) is known as an early biomarker of Alzheimer's disease. Antibody Aβ42 is a specific antibody or a monoclonal antibody that can be used as an ELISA-based Alzheimer's disease diagnostic kit. Antibodies are produced in mice through the amyloid immunization technique; monoclonal antibodies will be obtained from the spleen organ in mice. This study was conducted to study amyloidopathy in the liver of mice after immunization with amyloid beta 42 (Aβ42) antibody as a marker of Alzheimer's disease. This study used 20 mice and divided them into two groups. The group immunized with Aβ42 and the control group. This study uses 15.000pg/ml vaccine titter and injected to 10 mice via the subcutaneous route with 100l/mice dose. Histopathological observations of liver organs using Haematoxylin Eosin staining and the lesion was then analysed using ordinal type descriptive and semi-quantitative analysis. The results showed that there were inflammatory cell infiltration lesions and necrosis in immunized mice. The results of this study are expected to provide information regarding the effects of Aβ42 immunization on the liver of mice as animal models.
Keyword: Alzherimer's disease, amyloidosis, hystopathology, liver, mice

Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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