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Interleukin-6 as an Indicator for Acute Toxicity of DBL2β-PfEMP1 Recombinant protein as a Peptide-based Malaria Vaccine Candidate Sari, Leny Yulia Widia; Sulistyaningsih, Erma; Siswoyo, Tri Agus
Jurnal ILMU DASAR Vol 26 No 1 (2025)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jid.v26i1.48709

Abstract

Malaria caused by Plasmodium spp is an important health problem, and vaccination could be essential for disease prevention. One potential protein candidate is the Duffy binding-like 2β (DBL2β)-Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1). The protein is responsible for malaria pathogenesis by mediating binding to intercellular adhesion molecule-1 (ICAM-1), a receptor on the host cells. This study aimed to investigate the acute toxicity of the DBL2β-PfEMP1 recombinant protein as a basis for developing a peptide-based malaria vaccine based on body weight and interleukin-6 (IL-6) concentration. The study used male and female Wistar rats, which were divided into treatment and control groups after two weeks of acclimatization. Rats in the treatment group were injected with 750 µg DBL2β-PfEMP1 recombinant protein, and the control group was injected with NaCl 0.9%. Any indications of clinical toxicity symptoms were closely monitored within 4 hours of injection up to 24 hours. Observations were conducted daily for 14 days and included body weight and toxicity symptoms such as rising fur, tremors, salivation, diarrhea, weakness, draping, excitability, twitching, and death. Blood was collected on days 5, 7, and 14 for IL-6 examination using the ELISA method. Rats were euthanized on day 14. Data were analyzed using an ANOVA test. There was no significant weight loss as well as weight gain and toxicity symptoms during 14 days after treatment in all groups. There was an increase IL-6 levels on day 14 in all groups. However, statistical analysis did not show a significant difference between the control and treatment groups (p>0.05). This study showed that the DBL2β-PfEMP1 recombinant protein has no acute toxicity in Wistar rats, implying its safety and potential as a peptide-based malaria vaccine.
Effect of Telang Flower Infusion on Lymphocyte Cells and Neutrophil Cells (Segment And Band) in Microplastic-Induced Rats Muflihah, Ahdiah Imroatul; Destiawan, Rian Anggia; Sari, Leny Yulia Widia
Jurnal Kesehatan dr. Soebandi Vol 14 No 1 (2026): Jurnal Kesehatan dr. Soebandi
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas dr. Soebandi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36858/jkds.v14i1.1057

Abstract

Background:   Microplastics causing tissue damage and increasing the number of lymphocyte cells and neutrophils (segment and band). Telang flower infusion contains flavonoids as antioxidants that can as immunomodulatory. The purpose of this study was to determine the effect of telang flower infusion on the number of lymphocyte cells, band and segment neutrophils. Methods:   Methode begins with the manufacture of telang flower infusion, the manufacture of microplastics (heating bottled drinking water at a temperature of 65oC), the analysis of the size of microplastics using electron microscopes, the analysis of microplastic types using the FTIR method, the grouping of negative control, positive control, and treatment with a dose of 4 ml/250g BW, exposure to microplastics, blood smear, giemsa staining for lymphocyte and neutrophil cell analysis, and statistical test using One-Way ANOVA (p<0.05) with Tuckey HSD (p<0.05). Results:  The results showed that the average number of negative control band neutrophil cells (3.50+4.50), positive control (3.17+3.81), and treatment (5.33+3.61) and the One-Way ANOVA analysis showed values (p=0.81>p=0.05), the average segment neutrophil cells of the negative control (23.67+6.80), the positive control (21.33+5.82), the treatment (24.00+8.19),  and the One-Way ANOVA analysis showed values (p=0.776>p=0.05), negative control lymphocyte cells (68.50+14.84), positive control (72.17+4.99), and treatment (64.00+12.10). The One-Way ANOVA analysis showed a value of (p=0.481>p=0.05). Conclusions:  It can be concluded that telang flower infusion has a tendency to act as an immunomodulator at the biological level characterized by a decrease in lymphocyte cells, an increase in band neutrophil cells and segment nuetrophic cells.