Mitigating Toxic Effects of Nigerian Bonnylight Crude Oil on Sperm Motility and Morphology of Wistar Rats with Ethanol Leaves Extract of Ageratum Conyzoides Supplementation

reported This has been illustrated to reduce sperm count, motility and distorted morphology in experimental Bonnylight Infertility characterized with low semen quality, like many other health conditions has multifactorial etiologies, ranging from genetic to lifestyle to environmental exposure to pollutants. Sperm Toxic Effects of Nigerian Bonnylight Crude Oil on Sperm Motility and Morphology of Wistar Rats with Ethanol Leaves Extract of Ageratum Conyzoides . sperm and non-progressivity sperm, (p<0.05). It is concluded that NBLCO administration could induce infertility by interference with sperm concentration, morphology and motility, which ethanol leaf extracts of Ageratum conyzoides has been confirmed to show some therapeutic potentials of recovering.

motility and morphology are important parameters for sperm viability and play critical role in determination of semen quality.
Distortion of the aforementioned parameters lead to deficiencies in the semen quality and can impact negatively on male fertility due to high sensitivity to many of the harmful chemical and physical agents generated into the environment [8,9]. The ability of a sperm cell to freely move to interact with an ovum is crucial in determining the capacity of such sperm to fertilize an ovum.
It is also important to focus attention on how interference with normal spermatozoa movement can influence their viability.
Therefore, proper evaluation of sperm concentration, motility and morphology are veritable properties required for effective and efficient sperm functions. Normal sperm motility and shape are essential for easy passage through the highly viscous cervix wall, uterus, and ampullae of the oviducts of the female organism to reach the ovum. Distortion in sperm's apparati (contractile proteins of the tail) for movement motility and morphology can prevent the sperm's contact with an ovum to prevent fertilization [10,11].
Exposure to toxic chemicals in petroleum can damage the sperm by compromising the cellular membrane integrity and contractile proteins through lipid peroxidation and inflammation processes.
The excessive production of free radicals during these processes can be detrimental to sperm by destroying the contractile proteins and lipid components of the sperm membrane; the sperm plasma membrane contains a high amount of unsaturated fatty acids making it particularly susceptible to peroxidative damage [12,13].
This destroys the structure of membrane lipid matrix to account for defective membrane integrity [14], and poor motile capacity due to the destructions of contractile protein elements in sperm tail. The ease with which spermatozoa pass through highly viscous cervical mucus is highly dependent on their rapid progressive motility [15,16], which in turn is dependent on the integrity of the contractile components of the sperm membrane, particularly the tail. Normal semen that is viable must as a matter of fact contain at least 50% of sperm that are progressively motile.
And if for any reason, the semen contains up to 50% or more of immotile sperms then the viability of such semen is in doubt. This may suggest infertility as persistent poor motility is reported to be a good predictor of failure of sperm cell to fertilize an ovum [17]. ASAs can be detrimental to sperm's health where they exhibit cytotoxic tendency on the spermatozoa as well as the immobilization of sperm cells and even sperm death. With the production of ASAs as a result of inflammation coagulability tendency is enhanced to increase agglutination of moving sperm in semen, this agglutinated semen in turn immobilize the sperm, and impede free passage of sperm through the mucus-rich cervical wall, uterus to the fallopian tube to interact with the ovum [18].
Mitigation of these processes by the promotion of the antioxidant systems is essential to improve sperm motility. In furtherance to this, focus on natural reservoir of bioactive agents with various identified phytochemicals like antioxidants is apt. Plants have long been identified as natural reservoir of bioactive agents with various identified phytochemicals like antioxidants [19][20][21][22][23][24][25]. One of such plants with bioactive constituents is Ageratum conyzoides.
Ageratum conyzoides (billy goat-weed, chickweed, goat weed, white weed) is an annual herbaceous plant with long history of traditional medicinal uses in several countries of the world due its high bioactivity constituents. There is high variability in the secondary metabolites of Ageratum conyzoides which include terpenoids, sterols, flavonoids, chromenes, pyrrolizidine alkaloids, caumarin, pyrroline, lignin, essential oils and tannins. Since impede sperm motility is a consequence of oxidative stress and inflammation, this study was therefore designed to investigate the mitigating toxic effects of Nigerian Bonnylight crude oil on sperm motility and morphology of Wistar rats with ethanol leaves extract of Ageratum conyzoides supplementation.

Materials and Methods
The crude petroleum used in this study was obtained from the

Preparation of Leave Extract
The leaves of A. conyzoides were rinsed with distilled water and dried under shade. The dried leaves were ground into powder with an electric blender. Four hundred grams of the blended leaves sample was macerated in 700mL 70% ethanol agitated for 10 minutes with an electric blender and left overnight in a refrigerator at 4°C. The mixture was filtered with a cheese cloth and the filtrate obtained concentrated under reduced pressure using a rotary evaporator (at 37°C) to about 10% of its original volume. The concentrate was then allowed in a water bath at 37°C for complete evaporation to dryness yielding 40.64g (10.16%) of the extract.

Acute Toxicity Test
Acute toxicity study (LD 50 ) was estimated using Lorke's method [26]. A total of 25 mice weighing between 15 and 22 g were divided into five groups with five mice per group. Mice in the five groups were respectively administered 3000mg/kg, 3500mg/kg, 4000mg/ kg, 4500mg/kg and 5000mg/kg of body weight intraperitoneally. All experimental animals were observed for physical signs of toxicity such as gasping, palpitation, writhing, decreased respiratory rate, body limb and death after 24 hours. The median lethal dose of

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Ageratum conyzoides was calculated as geometrical means of the maximum (most tolerable) dose producing 0% mortality (a) and the minimum (least tolerable) dose producing 100% mortality (b) using the formula: The acute toxicity test for the NBLCO also involved 25 mice weighing between 15 and 22g were divided into five groups with five mice per group. Mice in the five groups were administered intraperitoneally 10mL/kg, 15mL/kg, 20mL/kg, 25mL/kg and 30mL/kg of body weight respectively.

Experimental Animals
Twenty male Wistar rats (120-145g body weight) were obtained from the Animal House of the Faculty of Basic Medical Sciences University of Uyo, Nigeria and were kept in a well-ventilated section of the Animal House. They were allowed access to feed (Chow: vital feeds, Grand Cereals Ltd, Jos) and water ad libitum.
The animals were kept in separate experimental room and allowed to acclimatize for a period of one week before commencement of studies.

Experimental Design and Treatment of Animals
A total of twenty male Wistar rats (120-145g body weight) were randomly divided into four groups (I-IV) of five rats each.
The rats in group I served as the control and were oral gavaged 3mL/kg of normal saline; group II were oral gavaged 748.33 mg/ kg body weight of the extract of Ageratum conyzoides, which was calculated as 20% of the LD 50 (3741.66 mg/kg). Group III was oral gavaged 3mL/kg body weight of NBLCO; this dose was calculated as 20% of the lethal dose of 14.14mL/kg and group IV animals were administered 748.33mg/kg body weight of the extract of A. conyzoides and 3mL/kg body weight of NBLCO. In all cases, doses were applied daily for 31 days according to animal's most recent

Collection of Blood Sample for Analysis
After the thirty-one (31) days of administration, the rats were anaesthetized with sodium pentobarbital at 50mg/kg intraperitoneally. And blood was collected by cardiac puncture with a 5ml sterile syringe and needle. The total volume of blood collected from the rat was averagely 4.5 ml, which was transferred into plain sample bottles. This was allowed to stand for 2 hours to clot after which the serum was separated by centrifugation (RM-12 micro centrifuge, REMI, England) at 3000rpm for 10minutes at

Seminal Analysis Using Computer Aided System (CASA)
The cauda epididymis from each side of the testes was dissected out and several small cuts of about 1mm made and the tissue suspended in 1m of buffered formal saline to allow the spermatozoa to swim up. The assessment of sperm motility was done using Computer-Assisted Semen Analysis (CASA) in accordance with the method described by Breanna Tilley and WHO criteria [27,28]. The following measurements were obtained from the Total cell detected and was used for the computation of other patterns of motility, these included Total cell in sample (106/ml), Concentration  Legend: TSCD = total sperm cell detected, TSCC = total sperm cell concentrated, NSC = normal sperm cells. a, b, and d = significantly different from groups I, II, and III respectively (p<0.05).

Sperm Morphology Following Treatment with Ethanol
Leave Extract of Ageratum conyzoides And Nigerian Bonnylight Crude Oil.
The results obtained following the administration of Nigerian Bonny light crude oil (NBLCO) and or leaf extracts of Ageratum conyzoides are presented in (Table 2). The results as presented in

Spermatozoa Motility Following Treatment with Ethanol Leave Extract of Ageratum conyzoides and Nigerian Bonnylight Crude Oil
The results obtained following the administration of Nigerian Bonny light crude oil (NBLCO) and or leaf extracts of Ageratum conyzoides are presented in Table 3. The results showed that  Legend: a, b, and d = significantly different from groups I, II, and III respectively (p<0.05) NSC = normal sperm cell, NR = normality rate, HAR = head anomality rate, BAR = body anomality rate, TAR = total anomality rate. Legend: a,b,c and d= significantly different from groups I, II and III (p<0.05).

Discussion
The interference of oral administration of NBLCO with normal sperm functions by interfering with sperm concentration, motility and morphology has been demonstrated in this study.
The administration of NBLCO to male rats significantly reduced It has been proposed that NBLCO is injurious to many body cells and tissues, the injuries or damages to cellular elements probably occurred through generation of radical oxidants and lipid peroxidation. The body is therefore equipped with spectrum of natural antioxidant systems to protect against these oxidative damages and also repairs damaged molecules [31]. In spite of these protective mechanisms, exposure to NBLCO has been reported to spike up and amplified oxidative damages such that the natural antioxidant mechanism is insufficient to mop up the oxidant radicals generated [32]. In this study, excessive production of free radicals occasioned by the administration of NBLCO without corresponding antioxidant systems can be detrimental to sperm by destroying the contractile proteins and lipid components of the sperm membrane and this may lead to male infertility as sperm plasma membrane is particularly susceptible to peroxidation because of its high content of unsaturated fatty acids [12,13].
The aforementioned events could destroy the structure of the sperm membrane lipid matrix [14], accompanied with destructions of contractile protein elements in sperm tail resulting in defective membrane integrity and loss of motility. The ease with which spermatozoa pass through cervical mucus is highly dependent on their rapid progressive motility [15,16], which in turn is dependent on the integrity of the contractile components of the sperm membrane, particularly the tail. For the reason (s), the experimental animals were supplemented with ethanol leaves extract of Ageratum conyzoides with a view to ameliorates and prevent these effects. The plant, Ageratum conyzoides could probably have offered protection against hazardous effects of NBLCO because of its extensive antioxidant reservoir [33].

Conclusion
The Nigerian Bonnylight Crude Oil has been shown to be spermatotoxic by significantly reducing sperm motility and normal sperm morphology. The NBLCO exert its hazardous effects through induction of oxidative stress and lipid peroxidation, the process that could induce inflammation process in the seminal fluid to evoke immune response with the attended consequences of formation of Antisperm Antibodies (ASAs) as reported in this study.
The significantly higher ASAs levels can be detrimental to sperm's heath where they exhibit cytotoxic tendency on the spermatozoa and could cause immobilization of sperm cells by induction of seminal agglutination of moving sperm cells and even sperm death.
It is possible to postulate that supplementation with Ageratum conyzoides could increase sperm cell resistance to crude oil toxicity including preventing the coagulability process, and thereby improving viability of sperm cells to improve fertility capacity. Such supplementation will be of great advantage to animals and humans who are exposed to crude oil. It is therefore concluded that NBLCO is spermatotoxic, which could be ameliorated with administration of Ageratum conyzoides.