Browsing by Author "James, A.S."

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"Echis ocellatus Venom-Induced Reproductive Pathologies in Rat Model; Roles of Oxidative Stress and Pro-Inflammatory Cytokines"
(MDPI, 2022) Ajisebiola, B.S.; Alamu, P.I.; James, A.S.; Adeyi, A.O.
This study reported reproductive pathologies associated with Echis ocellatus venom in animal model. Twenty male Wistar rats with body weight between 180 and 220 g were selected randomly into two groups (n = 10). Rats in group 1 served as the control while rats in group 2 were envenomed with a single intraperitoneal injection of 0.055 mg/kg􀀀1 (LD6.25) of E. ocellatus venom on the first day and a repeated dose on the twenty fifth day. Both control and envenomed rats were monitored for fifty consecutive days. The venom caused a significant (p < 0.05) reduction in sperm motility, count, and volume, with increased sperm anomalies in envenomed rats compared to the control. Likewise, serum concentrations of male reproductive hormones were significantly (p < 0.05) higher in envenomed rats. Increased levels of malondialdehyde were accompanied by a significant (p < 0.05) decrease in reduced glutathione and catalase activity in the epididymis and testis tissues of envenomed rats. The venom enhanced the release of epididymal and testicular tumor necrosis factor-alpha and interleukin1-beta compared to the control. Furthermore, severe pathological defects were noticed in tissues of the testis and epididymis of envenomed rats. This study demonstrated that E. ocellatus venom toxins can induce reproductive dysfunction in male victims of snake envenoming.
Ferulic acid mitigates 2-methoxyethanol-induced testicular oxidative stress via combined downregulation of FoxO1, PTEN, and modulation of Nrf2-Hmox1-NQO1 signaling pathway in rats
(Elsevier, 2023) Adeyi, O.E.; Somade, O.T.; James, A.S.; Adeyi, A.O.; Ogbonna-Eze, S.N.; Salako, O.Q; Makinde, T.V.; Ajadi, O.M.; Nosiru, S.A.
INTRODUCTION: Ferulic acid (FERA) is a natural antioxidant that is richly found in herbs, including Ligusticum chuangxiong, Cimicifuga heracleifolia, and female ginseng (Angelica sinensis), which are utilized in modern Chinese medicine, and in cereals/grains including rice, which is mostly consumed by humans. 2METE on the other hand, is a ubiquitous substance that has many industrial applications, including use in the preparation of dyes for textiles, hydraulic fluid for automobiles, paints, and liquid soaps. It is a testicular toxin, which can induce oxidative stress in the testis of rats. Therefore, this study investigated the effect of FERA, which was concomitantly administered, against 2-methoxyethanol (2METE)-induced testicular oxidative stress in rats. METHODS: Male Wistar rats totaling twenty (20), separated into four (4) groups, were used for the study. Rats in group one served as the control, rats in groups two and three were administered 100 mg/kg of 2METE only for 30 consecutive days, but only rats in group three were concomitantly treated with 50 mg/kg of FERA for the same duration, while rats in group four were treated with 50 mg/kg of FERA only. RESULTS: Following analysis, 2METE administration caused a significant reduction in the relative testes weight (RTW), NAD(P)H quinone oxidoreductase 1 (NQO1), and reduced glutathione (GSH) levels, as well as superoxide dismutase (SOD) and glutathione S-transferase (GST) activities in the testis of rats compared with the control. Moreover, 2METE administration also significantly increased the testicular levels of malondialdehyde (MDA), nitric oxide (NO), and RNA gene expressions of heme oxygenase 1 (Hmox1), nuclear factor erythroid 2-related factor 2 (Nrf2), forkhead box protein O1 (FoxO1), and phosphatase and tensin homolog deleted on chromosome 10 (PTEN) compared with the control. FERA treatment, on the other hand, significantly decreased the testicular levels of MDA, as well as Nrf2, Hmox1, PTEN, and FoxO1 gene expressions, and significantly increased the testic- ular GSH and NQO1 levels, activities of GST, SOD, glutathione peroxidase (GPx), and catalase (CAT) compared with 2METE only administered rats. CONCLUSION: 2METE-induced testicular oxidative stress, marked by the depletion of the endogenous antioxidant systems, was recorded, which resulted in the activation of PTEN, FoxO1, and Nrf2 genes in rats. FERA demon- strated a strong antioxidant effect by restoring the levels and activities of the endogenous antioxidants as well as downregulating the expressions of PTEN, FoxO1, and Nrf2 in the testis of rats.
"Moringa oleifera Extract Extenuates Echis ocellatus Venom‐Induced Toxicities, Histopathological Impairments and Inflammation via Enhancement of Nrf2 Expression in Rats"
(MDPI, 2021) Adeyi, A.O.; Adeyemi, S.O.; Effiong, E‐O.P.; Ajisebiola, B.S.; Adeyi, O.E.; James, A.S.
Echis ocellatus snakebite causes more fatalities than all other African snake species combined. Moringa oleifera reportedly possesses an antivenom property. Therefore, we evaluated the effectiveness of M. oleifera ethanol extract (MOE) against E. ocellatus venom (EOV) toxicities. Thirty male rats were grouped as follows (n = 5): Group 1 (normal control received saline), groups 2 to 6 were administered intraperitoneally, 0.22 mg/kg (LD50) of EOV. Group 2 was left untreated while group 3 to 6 were treated post‐envenoming with 0.2 mL of polyvalent antivenom, 200, 400, and 600 mg/kg of MOE respectively. MOE significantly (p<0.05) normalized the altered haematological indices and blood electrolytes profiles. MOE attenuated venom‐induced cellular dysfunctions, characterized by a significant increase in NRF2, and concomitant downregulation of increased antioxidant enzymes (SOD and CAT) activities in the serum and heart of the treated rats. MOE normalized the elevated TNF‐α and IL‐1β in serum and heart tissues. Furthermore, the IgG titre value was significantly (p<0.5) higher in the envenomed untreated group compared to the MOE‐treated groups. Hemorrhagic, hemolytic and coagulant activities of the venom were strongly inhibited by the MOE dose, dependently. Lesions noticed on tissues of vital organs of untreated rats were abolished by MOE. Our findings substantiate the effectiveness of MOE as a potential remedy against EOV toxicities.
Moringa oleifera leaf fractions attenuated Naje haje venom-induced cellular dysfunctions via modulation of Nrf2 and inflammatory signalling pathways in rats
(Elsevier, 2020) Adeyi, A.O.; Ajisebiola, B.S.; Adeyi, O.E.; Adekunle, O.; Akande, O.B.; James, A.S.; Ajayi, B.O.; Yusuf, P.O.; Idowu, B.A.
"Naja haje envenoming could activate multiple pathways linked to haematotoxic, neurological, and antioxidant systems dysfunctions. Moringa oleifera has been used in the management of different snake venom-induced toxicities, but there is no scientific information on its antivenom effects against Naja haje. This study thus, investigated the antivenom activities of different extract partitions of M. oleifera leaves against N. haje enve- noming. Forty five male rats were divided into nine groups (n =5). Groups 2 to 9 were envenomed with 0.025 mg/kg (LD50) of N. haje venom while group 1 was given saline. Group 2 was left untreated, while group 3 was treated with polyvalent antivenom, groups 4, 6 and 8 were treated with 300 mg/kg􀀀1 of N-hexane, ethylacetate and ethanol partitions of M. oleifera, respectively. Groups 5, 7 and 9 were also treated with 600 mgkg􀀀1of the partitions, respectively. Ethanol extract and ethyl acetate partition of M. oleifera significantly improved hae- matological indices following acute anaemia induced by the venom. Likewise, haemorrhagic, haemolytic and anti-coagulant activities of N. haje venom were best inhibited by ethanol partition. Envenoming significantly down-regulated Nuclear factor erythroid 2-related factor 2 (Nrf2) with the consequent elevation of antioxidant enzymes activities in the serum and brain. Treatment with extract partitions however, elevated Nrf2 levels while normalising antioxidant enzyme activities. Furthermore, there were reduction in levels of pro-inflammatory cytokines (TNF-α and interleukin-1β) in tissues of treated envenomed rats. This study concludes that ethanol partition of M. oleifera was most effective against N. haje venom and could be considered as a potential source for antivenom metabolites."
Naja nigricollis venom altered reproductive and neurological functions via modulation of pro-inflammatory cytokines and oxidative damage in male rats
(Elsevier, 2022) Ajisebiola, B.S.; Adeniji, O.B.; James, A.S.; Ajayi, B.O.; Adeyi, A.O.
"Reproductive and neurological anomalies are often characterized by malfunctioning of reproductive and nervous organs sometimes attributed to systemic toxins. However, limited information is available on the impact of snake venom toxins on male reproductive and nervous system. This study investigated the toxicological effects of Naja nigricollis venom on male reproductive and neural functions in rat model. Twenty male Wistar rats weighing between 195 and 230 g were divided randomly into two groups of ten rats each. Group 1 served as normal control while rats in group 2 were envenomed with a single intraperitoneal injection of 0.25 mg/kg􀀀1 (LD12.5) of N. nigricollis venom on first and twenty fifth day within the period of fifty days experiment. The venom signif- icantly decreased sperm counts, motile cells and volume combined with increased sperm abnormalities. The venom induced hormonal imbalances in the envenomed group as levels of testosterone, luteinizing and follicle stimulating hormones depreciated compared to the control. Oxidative stress biomarkers: malondialdehyde significantly increased parallels with depletion of glutathione level and catalase activities in testis, epididymis and brain of envenomed rats. Furthermore, N. nigricollis venom up-regulated tumor necrosis factor-alpha (TNF-α) and interleukin1-beta (IL-1β) production in testis, epididymis and brain of envenomed rats compared to the control. Also, various histological alterations were noticed in tissues of testis, epididymis and brain of envenomed rats. Findings indicated that N. nigricollis venom is capable of inducing reproductive and neurological dysfunction in envenomed victims."
Syringic acid demonstrates better anti-apoptotic, anti-inflammatory and antioxidative effects than ascorbic acid via maintenance of the endogenous antioxidants and downregulation of pro-inflammatory and apoptotic markers in DMN-induced hepatotoxicity in rats
(Elsevier, 2023) Adeyi, O.E.; Somade, O.T.; Ajayi, B.O.; James, A.S.; Adeyi, A.O.; Olayemi, Z.M.; Tella, N.B.
Dimethyl nitrosamine (DMN) is a known hepatotoxin, carcinogen, and mutagen. This study is therefore carried out to investigate the therapeutic effects of syringic acid (SYRA) and ascorbic acid (ASCA) in DMN-induced hepatic injury in rats. Following DMN administrations, malondialdehyde (MDA), nitric oxide (NO) and reduced glutathione (GSH) as well as activities of alanine aminotransferase (ALT), aspartate aminotransferase (AST), glutathione peroxidase (GPx), catalase (CAT), and superoxide dismutase (SOD) were significantly increased. Also significantly increased were levels of tumor necrosis factor-α (TNF-α), interleukin 1β (IL-1β), and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB). Following treatment with SYRA and ASCA, the activities of ALT, AST, GPx, CAT and SOD, as well as MDA, GSH, TNF-α, IL-1β, and NFkB levels were significantly reduced. Overall, both treatments were effective, but SYRA had a better therapeutic effect than ASCA. Therefore, this promising potential of SYRA can be taken advantage of in the treatment of DMN-induced hepatic injury.