Antioxidant and toxicological potential of the Golden trumpet hydroalcoholic stem bark extract

Handroanthus chrysotrichus is a tree of the Bignoniaceae family known as golden trumpet that is distributed throughout Northeast, Southeast and South Brazil. Its flowers, stem and bark are used for medicinal purposes in the treatment of cardiovascular and immune system diseases. This study aims to evaluate the phytochemical profile, biological activity spectrum, antioxidant capacity and toxicological potential of H. chrysotrichus stem bark extract. Hydroethanolic extract was obtained by percolation and lyophilized. Compounds present in the extract were analyzed by colorimetric methods and by GC-MS. Evaluation of the biological activity spectrum was performed in silico. Antioxidant power was determined by investigation of total antioxidant capacity, iron chelating capacity, DPPH• and ABTS•+ assays, and deoxyribose degradation test. The ability to inhibit Fe+ induced lipoperoxidation was evaluated in mouse brains and livers. Nauplii of Artemia salina were used to evaluate the median lethal dose. Toxicity was assessed by computer simulation, and in vitro in human lymphocytes. As a result, colorimetric methods suggest high levels of polyphenols and GC-MS data indicated the occurrence of α-curcumene, β-bisabolene, 4- (4-methylphenyl) pentanal, pentanoic acid and isoamyl acetate. Computer simulations have pointed biological activities that are in accordance with their traditional use. The H. chrysotrichus stem bark extract exhibited antioxidant activity in several assays and was effective in protecting mouse brains and livers from Fe+ induced lipoperoxidation. H. chrysotrichus stem bark extract showed medium toxicity in A. salina with potential presence of bioactive compounds. In general, the compounds showed low probability of toxicity in silico predictions. There was no cytotoxicity and genotoxicity in human lymphocyte evaluation. The results indicate that H. chrysotrichus stem bark extract has compounds with biological activity spectrum and low toxicological potential. It also shows antioxidant capacity and protective action against lipid peroxidation. The data presented support the medicinal use of golden trumpet and point to it as a promising extract for in vivo evaluations.

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Antioxidant and hepatoprotective potentials of miliusa velutina stem bark extract

Science and Technology Development Journal - Natural Sciences ◽

10.32508/stdjns.v4i3.880 ◽

2020 ◽

Vol 4 (3) ◽

pp. First

Author(s):

Đái Thị Xuân Trang ◽

Hieu Le Trung Bui ◽

Linh Chi Tran ◽

Danh Thai Luu ◽

Tuan Trong Nguyen

Keyword(s):

Antioxidant Activity ◽

Body Weight ◽

Ethanol Extract ◽

Stem Bark ◽

Hepatoprotective Effect ◽

Bark Extract ◽

Control Group ◽

Antioxidant Power ◽

Medicinal Uses ◽

Stem Bark Extract

Miliusa velutina (MV) stem bark has various medicinal uses, but its hepatoprotective effect has not yet been studied. This study investigated the antioxidant and hepatoprotective activity of the ethanol extract of MV stem bark against carbon tetrachloride (CCl4)-induced liver injury. The ethanol extract of MV stem bark was evaluated for in vitro antioxidant activity which exhibited good antioxidant activity in terms of ferric reducing-antioxidant power assay (EC50, FRAP=4.04±0.00 µg/mL), total antioxidant capacity assay (EC50, TAC=8.73±1.08 µg/mL) and 1,1-diphenyl-2-picrylhydrazyl (EC50, DPPH=9.33±0.07 µg/mL) radical scavenging assay. Mice were pretreated with CCl4 (2.5 mL/kg body wight per day) in 4 consecutive weeks. After one hour taking CCl4 by oral administration, mice were treated with the ethanol stem bark extract of MV at various concentrations of 100, 200, and 400 mg/kg body weight. The MV stem bark at the dose of 400 mg/kg body weight effectively reduced the level of alanine transaminase (38±6.78 U/L) and aspartate transaminase (AST) in serum. Besides, the MV stem bark at the dose 400 mg/kg body weight reduced the malondialdehyde (3.12±1,19 nM MDA/g tissue) level, and increased the activity of reduced glutathione (896.21±22.69 nM GSH/g tissue) in liver. The observation of the microscopic cross section of liver tissue also revealed that the mice treated with stem bark extract of MV at the dose of 200 and 400 mg/kg body weight had significantly improvement in liver tissues compared to the non-treated control group. Histological analyses of the MV-treated group exhibited reducing inflammatory process and preventing liver necrosis and fibrosis. In summary, the hepatoprotective effect of MV stem bark was seemingly associated with its antioxidant activity.

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Effects of Aqueous Stem Bark Extract of Stereospermum kunthianum on Carbon Tetrachloride - Induced Hepatotoxicity in Rats

Asian Journal of Research in Biochemistry ◽

10.9734/ajrb/2021/v8i330183 ◽

2021 ◽

pp. 44-52

Author(s):

Mahmoud Suleiman Jada ◽

Mohammed Aliyu Sulaiman ◽

Muktar Abdulmalik

Keyword(s):

Antioxidant Activity ◽

Intraperitoneal Administration ◽

Stem Bark ◽

Bark Extract ◽

Control Group ◽

Phytochemical Analysis ◽

Dependent Manner ◽

Antioxidant Power ◽

Stem Bark Extract ◽

Control Group Group

Aim: This study is aimed at evaluating the effects of the aqueous stem bark extract of Stereospermum kunthianum on CCl4-induced hepatotoxicity in rats. Methodology: Analysis of qualitative phytochemical components and antioxidant activity were carried out. Experimental rats were randomly divided into six groups of five rats each. Group 1: served as the normal control group. Group 2: was administered with CCl4 only at a dose of 3 ml/kg b.wt by single intraperitoneal administration. Group 3: served as the standard control group. Group 4: was administered with 200 mg/kg b.wt of the aqueous stem bark extract + CCl4. Group 5: was administered with 400 mg/kg b.wt of the aqueous stem bark extract + CCl4. Group 6: was administered with 600 mg/kg b.wt of the aqueous stem bark extract+ CCl4. Results: The phytochemical analysis showed the presence of flavonoid, phenols, saponins, and terpenoid while tannins and alkaloids were absent. The antioxidant activity showed that the extract significantly (P<0.05) inhibits Ferric Reducing Antioxidant Power (FRAP) and Thiobarbituric Acid Reactive Substances (TBARS), giving high activity as the concentration of the extract increases. The elevated levels of ALT and AST coupled with Conjugated bilirubin, Total bilirubin, and total protein caused by CCl4 administration were all reduced significantly (P<0.05) by the extract in dose dependent manner. Conclusion: These findings demonstrated that stem bark extract of Stereospernmum kunthianum could be an alternative medication for liver injury.

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