Introduction: In humans, Severe Acute Respiratory Syndrome Coronavirus (SARS-CoV-2) can damage some tissue when the immune systems was decrease. Natural product from the plant often used to improve immune response against microorganism including virus. This study aimed to determine the potential antioxidant of lemongrass extract (C . nardus) with various dosage that can provide immunomodulatory effects and find an optimal dosage to be used.  Methods: The method used observasional analytic, using animal model of 30 male mice strain BALB/C, weight 25-30 gram, divided into 5 groups; the positive control group was given 0.05 mL of  0.05% CMC within 14 days, negative control group was given IMBOOST® tablet 200 mg/kg body weight (bw) within 14 days, treatment groups  were given C. nardus extract with various doses 50 mg/kg bw, 150 mg/kg bw, and 300 mg/kg bw.  In day 21 all group were injected with 0,2 ml of  pathogen bacterial (S. aureus). Blood samples were taken three times: 7th day, 14th day, and 21th day. Results: The results showed that lemongrass extract (C. nardus) was able to influence the leukocyte and lymphocytes count with significant different (p<0.05). The optimal dose is 150 mg/kg body weight. Conclusion: The antioxidant compounds that contain in the C. nardus extract have an ability to increasing the immune system in the dose 150 mg/kg bw , but in the dose 300 mg/kg bw became toxic that can make a skin injury or death in animal test.

Penelitian ini bertujuan untuk mengetahui pengaruh pemberian ekstrak fraksi pericarpium manggis (Garcinia mangostana L.) dengan variasi kepolaran dan dosis terhadap profil protein epididimal spermatozoa mencit (Mus musculus) yang terpapar 2-Methoxyethanol. Penelitian ini menggunakan 50 ekor mencit jantan strain BALB/C dengan berat badan 25-30 gram yang dibagi menjadi 8 kelompok; kelompok kontrol positif diberi 0,05 ml larutan CMC 0,05 % selama 40 hari , kelompok kontrol negatif diberi 200 mg/kg BB 2-Methoxyethanol selama 35 hari, kelompok perlakuan (P1, P2, P3, P4, P5, dan P6) diberi 200 mg/kg BB 2-Methoxyethanol selama 5 hari, dilanjutkan dengan pemberian ekstrak fraksi dan dosis, kelompok P1 dan P2 diberi ekstrak fraksi non polar pericarpium manggis dengan dosis 0,6 mg/kg BB dan 3 mg/kg BB selama 35 hari , P3 dan P4 diberi ekstrak fraksi semi polar dengan dosis 4 mg/kg BB dan 20 mg/kg BB selama 35 hari, P5 dan P6  diberi ekstrak fraksi polar pericarpium manggis dengan dosis 0,4 mg/kg BB dan 2 mg/kg BB selama 35 hari. Protein diisolasi dari spermatozoa yang dikoleksi dari epididimis, kemudian diukur konsentrasinya dan dianalisis menggunakan elektroforesis SDS-PAGE. Data yang diperoleh dianalisis secara deskriptif dengan membandingkan profil protein kelompok kontrol dan kelompok perlakuan. Hasil penelitian menunjukkan bahwa ekstrak fraksi polar pericarpium manggis dengan dosis 0,4 mg/kg BB dapat berpengaruh dalam memulihkan profil protein (20 kDa) dari spermatozoa epididimal mencit setelah terpapar 2-Methoxyethanol

This study aimed to detection of protein profile, expression of metalothionein (MT) protein, and analyze difference of MT density in liver and gill in one of Carp fish that is Barbonymus balleroides in the upstream and downstream of Brantas river. The method used observasional analytic, Two individual of Barbonymus balleroides samples taken three times (with difference of month) from two station there are upstream and downstream of Brantas river. Analysis protein profile used electrophoresis SDS-PAGE (15%), expression and density of MT used western blot method and imageJ software. Difference between MT density in liver and gill of Barbonymus balleroides in the upstream and downstream of Brantas river analyzed with Two-way ANOVA. The results showed, protein profile in liver and gill Barbonymus balleroides in the upstream and downstream Brantas river have molecular weight about 8-93 kDa, expression of MT showed band of MT with molecular weight 24 kDa, results of MT density in liver and gill on upstream and downstream, continuously 231.29 MT/µm2 and 229.87MT/µm2, 232.41 MT/µm2 and  231.56 MT/µm2 but there is not significant.

Penelitian ini bertujuan untuk mengetahui efek perlindungan ekstrak serai wangi Cymbopogon nardus (C. nardus) terhadap induksi timbal asetat. Sebanyak 25 mencit jantan strain BALB/C secara acak dibagi menjadi lima kelompok. Kelompok kontrol negatif hanya mendapat injeksi sub cutan Na-CMC 0,5% selama 30 hari ; kontrol positif  diinjeksi sub cutan timbal asetat sebanyak 7 mg/kg bb selama 5 hari; P1, P2, dan P3 secara berturut-turut diinjeksi sub cutan timbal asetat 7 mg/kg bb selama 5 hari kemudian dilanjutkan dengan injeksi ekstrak C. nardus sebanyak 25, 50, dan 100 mg/kg bb selama 25 hari. Pada akhir penelitian semua mencit dikorbankan dan dilakukan koleksi testis. Jaringan testis diproses menggunakan pewarnaan Hematoxylin-Eosin. Hasil menunjukkan bahwa terjadi peningkatan sel spermatogonia, sel spermatosit, dan sel spermatid serta diameter tubulus seminiferus dibandingkan dengan kelompok positif. Dosis optimal yang paling mampu memperbaiki kerusakan jaringan testis yaitu 25 mg/kg bb. This study aimed to determine the protective effect of Cymbopogon nardus (C. nardus) extract against lead acetate exposure. A total of 25 male mice BALB/C were randomly divided into five groups. The negative control group only received 0.5% Na-CMC subcutaneously for 30 days; positive control was given 7 mg/kg bw of lead acetate subcutaneously for 5 days; P1, P2, and P3 were sequentially injected with 7 mg/kg bw subcutaneously for 5 days followed by injection of 25, 50, and 100 mg/kg bw of C. nardus extract for 25 days. At the end of the study all mice were sacrificed and testes were collected. Testicular tissue using Hematoxylin-Eosin staining. The results showed that there was an increase in spermatogonia cells, spermatocytes, and spermatid cells as well as the diameter of the seminiferous tubules compared to the positive group. The optimal dose most capable of repairing testicular tissue damage was 25 mg/kg bw.

Citronella grass (Cymbopogon nardus) is a plant containing many metabolite compounds which prevent and treat various diseases, one of which is cancer. Antioxidant compounds found in citronella have been shown to improve the immune system by increasing cytokines. The activity of changing homeostasis generates free radicals. Free radicals causing protein damage so that Heat Shock Protein-70 (HSP70) is overexpressed. HSP70 has a role as a chaperon. Mutations in the anti-apoptotic protein HSP70 are one of the causes of cancer. This current research aims to determine the potential of compounds present in the citronella plant stem as anti-cancer through inhibition of HSP-70. The method was a bioinformatics approach, namely the in-silico method which provided a simulation of binding protein ligands to HSP-70 as inhibitor mechanism. The results of this study indicated that there was a potential for citronella compounds, namely spathulenol binding to HSP-70. Spathulenol compounds interact with Hsp70 via the positions Thr204, Gly12, Gly203, Thr14, Lys71, Asp10, Val369, Asp199, Val337, Gly338, Asp366, Gly339, Pro365, Glys201, & Glys202 with Van der Waals bonds and hydrogen bonds on Thr13. In the complex, there was one unfavorable bond formed on the O atom of the query ligand. From the results above, it can be concluded that the Spathulenol compound is predicted to act as an inhibitor of Hsp70 protein activity because it inhibits the binding site of the native ligand on Hsp70. The stability of the binding interaction produced by Spathulenol allows a response to Hsp70 inhibitor activity. By inhibiting the activity of Hsp70 inhibitors, it is possible to inhibit the formation and proliferation of cancer cells