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All Journal Universa Medicina Jurnal Ilmu Kedokteran dan Kesehatan Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Ilmu Faal Olahraga Indonesia Current Research on Biosciences and Biotechnology Makara Journal of Health Research Jurnal Kedokteran Meditek
Imelda Rosalyn Sianipar
Department Of Medical Physiology And Biophysics, Faculty Of Medicine Universitas Indonesia, Jakarta, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Health Professions Immunology & microbiology Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Neuroscience Public Health

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Journal : Universa Medicina

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LOW VITAMIN B12 DIET INCREASES LIVER HOMOCYSTEINE LEVELS AND LEADS TO LIVER STEATOSIS IN RATS Sianipar, Imelda Rosalyn; Ujianti, Irena; Yolanda, Sophie; Jusuf, Ahmad Aulia; Kartinah, Neng Tine; Amani, Patwa; Murti, Krishna Aditya; Soeria Santoso, Dewi Irawati
Universa Medicina Vol 38, No 3 (2019)
Publisher : Faculty of Medicine, Trisakti University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (821.825 KB) | DOI: 10.18051/UnivMed.2019.v38.194-201

Abstract

Background Nonalcoholic fatty liver disease (NAFLD) is one of the most widespread chronic liver diseases, caused by the development of insulin resistance. One of the mechanisms involved is a disturbance in insulin signaling by certain toxic substances that interact with one of the proteins responsible for the insulin signaling pathway. Increased homocysteine level, upon disruption of the methionine pathway, is associated with insulin resistance. The aim of this study was to evaluate the effect of hyperhomocysteinemia and insulin resistance (HOMA-IR level) induced by dietary vitamin B12 restriction on liver steatosis. Methods A study of laboratory experimental design was conducted involving 18 male Sprague Dawley rats (age 36-40 weeks, BW 300-350 g), that were randomly divided into 3 groups: control, 8-week treatment, and 16-week treatment. Standard AIN-93 diet was administered to the control group, whereas rats in the treatment groups were fed vitamin B12 deficiency-AIN-93M. At the end of treatment, liver homocysteine levels were determined by ELISA, HOMA-IR values were calculated, and steatosis degree of the liver was determined histologically. Statistical analysis was performed using independent t-test. Results A significant increase in liver homocysteine levels was found between the control and both the 8- and 16-week treatment groups (p<0.001). HOMA-IR levels were significantly higher in both treatment groups compared to controls (p<0.001). The area of liver steatosis in both treatment groups was significantly larger than that of the control group (p<0.001). Conclusion Increased homocysteine levels due to dietary vitamin B12 deficiency induces liver steatosis due to insulin resistance in rats.
Neuroprotective effect of South Sulawesi propolis on neurogenesis in primary cultures of rat cerebral cortical neurons Nurhadi Ibrahim; Trinovita Andraini; Amirah Yusnidar; Putu Indah Paramita Adi Putri; Imelda Rosalyn Sianipar
Universa Medicina Vol. 42 No. 2 (2023)
Publisher : Faculty of Medicine, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18051/UnivMed.2023.v42.137-149

Abstract

BackgroundNeurodegenerative diseases have a significant risk factor, namely aging, which is associated with increased neuronal dysfunction and death. Propolis has been widely used as medicine due to its various benefits. This research study investigated the effect of propolis from the stingless bee (Tetragonula sapiens) from South Sulawesi, Indonesia, on neurogenesis in primary cultures of embryonic cerebral cortex of Wistar rats at 17-18 days of gestation. Methods This research was an experimental study involving 4 female pregnant Wistar rats, which were terminated and the cerebral cortex of the embryos collected and grown as primary cultures. The cultures were divided into 3 groups, i.e. control, vehicle, and propolis extract group. The research began with 3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium (MTS) to obtain the optimal dose among propolis doses of 0.5 μg/mL, 1 μg/mL, 5 μg/mL, 10 μg/mL, 25 μg/mL, and 100 μg/mL. The study was continued by using the best dose in immunostaining examination using microtubule-associated protein 2 (MAP2) primary antibody and qRT-PCR examination of brain-derived neurotrophic factor (BDNF) mRNA expression. One Way ANOVA and Kruskal-Wallis test were used to analyse the data. ResultsThe results showed that the propolis doses of 0.5 μg/mL and 1 μg/mL significantly increase cell viability compared to the other doses (p=0.011) and stimulate dendritic growth. The propolis dose group of 1 μg/mL induces a significantly higher expression of BDNF mRNA than the control group (p=0.031). ConclusionOur findings indicate that stingless bee propolis has neuroprotective effects against BDNF mRNA in rats. It is shown that propolis can be a candidate inhibitor in neurodegenerative diseases.
Myosin heavy chain as biomarker in the prevention of sarcopenia Sari, Desy Nofita; Sianipar, Imelda Rosalyn; Goenarjo, Roman Ardian
Universa Medicina Vol. 45 No. 1 (2026): Aheaf Of Print
Publisher : Faculty of Medicine, Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18051/UnivMed.2026.v45.%p

Abstract

Sarcopenia, or the age-related loss of skeletal muscle mass and function, can reduce total muscle contractile capacity and increase the likelihood of physical disability in older adults. The loss of muscle mass and contractile performance is generally thought to be multifactorial, with as possible contributing factor an age-related shift in the expressed amounts of myosin heavy chain (MyHC) isoforms. The composition of adult human skeletal muscle consists of a mixture of three distinct MyHC isoforms (I, IIA, and IIX). This literature review aimed to explore studies focused on the signs of sarcopenia, the early detection of initial symptoms, and awareness among the aging population. We aimed to understand the molecular changes in muscle fibers as people age and to help inform the early intervention approach to prevent sarcopenia. The literature search was conducted in several databases between 2020 to 2025, including PubMed, ScienceDirect, and SpringerLink. The search terms consisted of “sarcopenia”, “muscle mass”, “early detection”, and “myosin heavy chain”. Inclusion criteria included original full-text English-language studies on the cellular and molecular physiology of sarcopenia. Molecular changes in myosin heavy chain vary across different age groups, suggesting the potential for early detection of muscle aging. The review is limited by the variability in the definition and measurement of sarcopenia across different studies, which may affect the generalizability of the findings. This review highlights the potential significance of identification and sarcopenia management in elderly individuals. The findings would be helpful for clinicians, researchers, and policymakers to improve elderly care and quality of life.
Co-Authors Ahmad Aulia Amirah Yusnidar Antoni, Marcel Desy Nofita Sari Fasha, Iqbal Gayatri, Alya Indah Gita Pratama Goenarjo, Roman Ardian Inna Rahmawati Iqbal Fasha Irena Ujianti Jalma, Monica Dwi Murti, Krishna Aditya Naibaho, Fitri Boru Neng Tine Kartinah Almuktabar Nisa Kartika Komara Nuraditya, Robby Nuraini Diah Noviati Nurhadi Ibrahim Nurul Paramita Patwa Amani, Patwa Putu Indah Paramita Adi Putri Radiana Dhewayani Antarianto Rahmawati, Inna Retno Lestari Retno Lestari Robby Nuraditya Samuel Febrian Wijaya Santoso, Dewi Irawati Soeria Sophie Yolanda Trinovita Andraini Trinovita Andraini Wijaya, Samuel Febrian Yuda Nabella Prameswari