AbstrakLatar belakang: Malondialdehida (MDA) merupakan petanda stres oksidatif yang merupakan produk akhir dari reaksi berantai proksidasi lipid. Untuk mencegah stres oksidatif, tubuh mensintesis katalase, suatu enzim antioksidan endogen yang mengkatalisis hidrogen peroksida (H 2 O 2 ) menjadi air dan oksigen. Sampai saat ini kadar MDA dan katalase pada populasi usia lanjut (usila) masih memberikan hasil yang bervariasi dan kadar tersebut pada kelompok usia yang berbeda dalam populasi usila belum pernah dilaporkan. Dengan demikian, penelitian ini bertujuan untuk menganalisis profil kadar MDA dan aktivitas spesifik katalase pada plasma populasi usila berdasarkan peningkatan usia.Metode: Penelitian ini menggunakan 60 subjek wanita usila sehat yang tinggal di Jakarta. Subjek dibagi dalam 2 kelompok berdasarkan kategori usia, kelompok yang lebih muda (60 -70 tahun) dan kelompok yang lebih tua (> 70 tahun). Kadar MDA dan aktivitas spesifik katalase dianalisis pada plasma dengan spektrofotometer.Hasil: Kadar MDA pada kelompok yang lebih muda (60 -70 tahun) sedikit lebih tinggi dibandingkan kelompok yang lebih tua (> 70 tahun) namun tidak bermakna secara statistik. Selain itu, akitivitas spesifik katalase pada kelompok yang lebih muda lebih rendah bermakna dibandingkan dengan kelompok yang lebih tua. Kesimpulan: Tidak ada perbedaan bermakna kadar MDA plasma pada populasi usila. Namun, aktivitas spesifik katalase meningkat bermakna seiring dengan pertambahan usia. (Health Science Journal of Indonesia 2019;10(2):132-6) AbstractBackground: Malondialdehyde (MDA) is a marker of oxidative stress as an end product from the chain reaction of lipid peroxidation. In order to prevent oxidative stress, our body synthesizes catalase, an endogenous antioxidant enzyme that catalyzes hydrogen peroxide (H 2 O 2 ) into water and oxygen. Until now, the level of MDA and catalase in aging population were still varied and those level at different age in elderly population has not been yet reported. Therefore, the purpose of this study was to analyse the profile of MDA level and catalase specific activity in plasma of elderly women based on increasing age. Methods:This research used 60 healthy elderly women as the subjects living in Jakarta. The subjects were divided into 2 groups based on age category, the younger group (60 -70 years old) and the older group (>70 years old). MDA and specific activity of catalase were analyzed in plasma using spectrophotometer.Results: MDA level in the younger group (60-70 years old) was slightly higher than MDA levels in the older group (>70 years old) but it was not significant. Moreover, specific activity of catalase in the younger group was significantly lower than the older group.Conclusions: There was no difference in MDA level of elderly woman between younger and older group. However, catalase specific activity significantly increased with increasing age.

Summary Voltage‐dependent anion channels (VDACs1‐3) are pore‐forming proteins located in the outer mitochondrial membrane of various tissues and in human sperm flagella. VDACs are involved in metabolite fluxes between mitochondria and other cell compartments and play a role in the motility of mammalian spermatozoa. VDAC3‐deficient male mice lacking exons 5–8 were reported to be healthy but infertile (Sampson et al., 2001). We analysed mutations in these exons of the human VDAC3 (hVDAC3) gene in spermatozoa of 32 asthenozoospermic patients. Previously, we reported on nucleotide substitution mutations in exon 6 (Asmarinah et al., 2005); now, we continue with the examination of exons 5, 7 and 8. Amplification of the exon fragments of the hVDAC3 gene was carried out by polymerase chain reaction (PCR) using specific primers for each exon followed by sequencing. We found various types of mutations in the examined exons of the hVDAC3 gene, such as deletion and nucleotide substitution in spermatozoa from seven of the 30 asthenozoospermic sperm samples (and unconfirmed insertions in two other ones) but none in spermatozoa from normozoospermic controls. Our preliminary data, although of small numbers investigated, suggest that genetic mutations in the hVDAC3 gene could be an explanation for the aetiology of infertility in these asthenozoospermic patients.

Glioblastoma multiforme (GBM) is the most aggressive form of Background malignant glioma and is also known as grade IV astrocytoma. This might be due to the presence of cancer stem cells with high pluripotency and ability of self-renewal. Recently, it has been reported that tumor stroma cells, including mesencyhmal stem cells (MSCs), secrete factors that affect cancer cell growth. Until now, the role of MSC secretomes in cancer stem cell pluripotency remains unclear. The aim of this study was to analyze the effect of MSC secretomes in conditioned medium (CM) on the expression of pluripotency markers of GBM cells.: Umbilical cord-derived MSCs (UCSCs) were grown on serum-free Methods alphaMEM for 24 hours to prepare the UCSC-CM. Human GBM T98G cells were treated with UCSC-CM for 24 hours. Following this treatment, expression of pluripotency markers SOX2, OCT4 and NANOG genes was analyzed using quantitative RT-PCR.: SOX2 and OCT mRNA expression was 4.7-fold (p=0.02) and 1.3-fold Results (p=0.03) higher in CM-treated cells compared to the control. However, there was no change in NANOG mRNA expression. This might be due to there being others factors regulating NANOG mRNA expression.: UCSC-CM could affect the expression of SOX2 and OCT4 in Conclusions human glioblastoma multiforme T98G cells. Further research is needed to elucidate the mechanism by which pluripotency markers are expressed when induced by the UCSC secretome. Keywords

Background: Preeclampsia was a syndrome of hypertension proteinuria in pregnant women. In failure of pseudo vasculogenesis, there is persistency of endothelial and smooth muscle cell of vessel wall in spiral artery. Spiral artery could not be emphasis and lead to relative hypoxia, and oxidative stress in placental tissues. Endothelial cell has property to produce nitric oxide (NO) that can dilated vessel. Placenta also produces prorenin, to maintain vascular wall tonicity. Therefore, we want to uncover the property of placenta is there any capacity of prorenin, is that prorenin could overcome the NO level, or is there any depression of NO production, and any oxidative stress.Methods: This observational study was used case-control design. We search preeclampsia cases during September-December 2015. We used preeclampsia placentas from early and late onset. We collect preeclampsia placentas from Cipto Mangunkusumo and normal placentas from Budi Kemuliaan Hospital. We used 30 preeclampsia placentas and 30 normal placentas. Markers measured were NO and prorenin. NO was measured using colorimetric assay kit (K262-200/ BioVision), and prorenin was measured using human prorenin enzyme-linked immunosorbent assay kit (ab157525/ Abcam). Glutathione (GSH) was measured using Ellman method and malondialdehyde (MDA) using Wills method. Results:Prorenin concentration between normal and preeclampsia placenta was analyzed using Mann-Whitney and show that there had no significant difference between preeclampsia and normal placentas (p=0.23). Besides, NO data analyzed using independent t-test show significant differences between preeclampsia and normal placentas (p=0.001). The difference between normal and preeclampsia GSH concentration was not significant (p=0.757), besides the difference between normal and preeclampsia MDA concentration was significant (p=0.000).Conclusion: NO concentration in preeclampsia placenta was increase, higher than normal placenta. There was no effect of preeclampsia on prorenin concentration and GSH. There was marked decrease of MDA in preeclampsia placentas.

Background: Preeclampsia was a syndrome of hypertension proteinuria in pregnant women. In failure of pseudo vasculogenesis, there is persistency of endothelial and smooth muscle cell of vessel wall in spiral artery. Spiral artery could not be emphasis and lead to relative hypoxia, and oxidative stress in placental tissues. Endothelial cell has property to produce nitric oxide (NO) that can dilated vessel. Placenta also produces prorenin, to maintain vascular wall tonicity. Therefore, we want to uncover the property of placenta is there any capacity of prorenin, is that prorenin could overcome the NO level, or is there any depression of NO production, and any oxidative stress.Methods: This observational study was used case-control design. We search preeclampsia cases during September-December 2015. We used preeclampsia placentas from early and late onset. We collect preeclampsia placentas from Cipto Mangunkusumo and normal placentas from Budi Kemuliaan Hospital. We used 30 preeclampsia placentas and 30 normal placentas. Markers measured were NO and prorenin. NO was measured using colorimetric assay kit (K262-200/ BioVision), and prorenin was measured using human prorenin enzyme-linked immunosorbent assay kit (ab157525/ Abcam). Glutathione (GSH) was measured using Ellman method and malondialdehyde (MDA) using Wills method. Results:Prorenin concentration between normal and preeclampsia placenta was analyzed using Mann-Whitney and show that there had no significant difference between preeclampsia and normal placentas (p=0.23). Besides, NO data analyzed using independent t-test show significant differences between preeclampsia and normal placentas (p=0.001). The difference between normal and preeclampsia GSH concentration was not significant (p=0.757), besides the difference between normal and preeclampsia MDA concentration was significant (p=0.000).Conclusion: NO concentration in preeclampsia placenta was increase, higher than normal placenta. There was no effect of preeclampsia on prorenin concentration and GSH. There was marked decrease of MDA in preeclampsia placentas.