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Purpose: This work aimed to define the histopathological severity of fluorinated, brominated and chlorinated pyrethroid insecticides on endocrine pancreas of mice. Methods: Fourty male mice (Mus musculus) were categorized into four groups and each group containing ten animals. 0.1mL dose of corn oil was given to the vehicle contro (VC) group animals for three days. This group was kept as a reference group. The 0.1mL corn oil containing 5mg/kg dose of each insecticide such as Cypermethrin (CYP), Deltamethrin (DLT) and Lambda cyhalothrin (LC) was given to three group of mice for three days, followed by three days of none treatment. Dissection procedure was carried out at 7th day. Results: All the micrometric results and histopathological alterations have shown that pyrethroid insecticides were highly toxic to endocrine pancreatic tissues. The various histopathological sign such as strip arrangements of endocrine cells in islets, endocrine cellular necrosis mainly in the central and pericentral areas of islets and increased vacuolation in surviving endocrine cells etc. In three insecticides treated groups, there were significantly decline in the relative abundance of endocrine cells per unit area (1230µm²) such as CYP (8.8±0.25) DLT (7.5±0.23) and the LC (7.5±0.23) as compare to control group (9.7± 0.24). It indicates that type II pyrethroid insecticides are generally pancreo-toxic and they specifically target the islets of langerhans cells. Conclusions: The severity of the mentioned pathological sign in LC and DLT groups indicated that these non-dietary halogenated (fluorinated and brominated respectively) pyrethroid inflict more severe histopathological impacts on the endocrine pancreas as compare to the simple chlorinated type II pyrethroid the CYP. The findings reflects that these otherwise consider comparatively safer or less toxic insecticides for the non-target organisms like mammals have come out to be highly toxic to the endocrine tissues particularly the pancreas. [ABSTRACT FROM AUTHOR]

Purpose: Histopathological and micrometric effects of Cypermethrin (CYM) and lambda-cyhalothrin (LCH), the type II pyrethroid insecticides, were explored on adrenals of 6 weeks old sixty male mice (28-30g). Additionally the ameliorative capacity of extra virgin olive oil treatment were also investigated against their pathologies. Methods: Sixty male mice (28-30g) were randomly distributed in six groups (10 mice each): 1. Negative control group (Cont) (100µL corn oil for two days followed by one day rest (no dose) and 100µL corn oil for next three days), 2. Positive control group (Virgin Olive Oil/VOO) (100µL corn oil for two days followed by one day rest (no dose) and 100µL extra virgin olive oil for next three days), 3. CYM group (100µL of 5mg/kg CYM solution in corn oil for two days, one day rest (no dose) and three day post treatment of 100µL corn oil), 4. LCH group (100µL of 5mg/kg LCH solution in corn oil for days 1-2, no dose on day 3 followed by 100µL corn oil from day 4-6), 5. CYM+VOO group (CYM treatment as in group three followed by extra virgin olive oil treatment as in group two after one day rest) and 6. LCh+VOO group (LCH treatment as in group four followed by extra virgin olive oil treatment as in group two after one day rest). All solutions were given to mice through gavage. Results: The results showed various characteristic effects of insecticide exposure upon adrenal cortex (lesions in zona fasciculata leaving behind wide empty spaces between adjacent fascicles), medulla (cellular necrosis, vacuolization in cytoplast and nuclear disintegration, enlarged nuclei and cytoplast). In addition to that various significant micrometric alterations were also noted. Extra virgin olive oil significantly rehabilitated the derailments in the adrenal cortex and adrenal medulla. Conclusions: On basis of present findings it is obvious that the type II pyrethroid insecticides bear cortico-medullary adrenal toxic potentials. As these pathologies were found effectively ameliorated upon OV treatment, it is concluded that such pathological implications are rescuable by the extra virgin olive oil. [ABSTRACT FROM AUTHOR]

The present study examines the thyro-parathroid toxicological impacts of a fluoridated (Lambda cyhalothrin) and a non-fluoridated (Cypermethrin) pyrethroid in male albino mice and the amelioration of these toxicities with post treatment with extra virgin olive oil (EVOO). Study plan included 6 groups. 1: Vehicle control (Cnt group) received 0.1 mL corn oil for days 1,2, 4-6) and 2: Positive control (Olv group) received 0.1 mL corn oil for days 1-3 and 0.1mL EVOO for days 4-6) 3: cypermethrin group (Cpr group) and 4: Lambda Cyhalothrin group (Lch group) received 5 mg/Kg cypermethrin or Lambda Cyhalothrin respectively for days 1-2, no treatment on day 3, 0.1mL corn oil for days 4-6) 5: Cypermethrin+Olive group (Cpr+Olv group) and 6: Lambda cyhalothrin+Olive group (Lch+Olv group) received 5mg/kg cypermethrin or Lambda Cyhalothrin respectively for days 1-2, no treatment on day 3, 0.1mL EVOO for days 4-6). Results of the present study indicate that both of the insecticides are toxic to the endocrine tissue examined in the study. However lambda cyhalothrin led to severe histopathological (Cords seemed to be merged and focal degenerations can also be observed in central and peripheral regions) and micrometric changes compared to the cypermethrin. Various significant alterations occurred in micrometric parameters, such as mean CSA of follicular cells, Para-follicular cells and follicles were significantly higher in lambda cyhalothrin groups as compared to cypermethrin group. The morphometric data also showed a significant (p≤0.05) decrease in mean cross-sectional area of follicular cells (Cnt: 51.33±1.05, Olv: 51.16±1.16, Cpr: 62.45±1.8, Lch: 61.00±2.1, Cpr+olv: 54.3±1.8 and Lch+olv: 55.2±1.7), CSA of follicles (Cnt: 2083±128.6, Olv: 2019.84±189.7, Cpr: 1946.6±94.03, Lch: 1712.6±139.6, Cpr+olv: 2041.7±114 and Lch+olv: 1483.3±134.4), Para-follicular cells (Cnt: 55±11.09, Olv: 51.76±9.0, Cpr: 73.8±15.7, Lch: 60.9±10.7, Cpr+olv: 54.1±8.8 and Lch+olv: 51.9±11.8) indicating that the fluoridation has contributed significantly to the pathological potential of this insecticide. On the other hand olive oil has been found to contain rescuing and rehabilitation potentials and ameliorated the mean CSA of follicular cells, CSA of follicles and parafollicualr cells, against the histopathologies of these insecticides. [ABSTRACT FROM AUTHOR]

Histopathological and micrometric alterations of mice liver and kidney against gastro-intestinal exposure of (lambda-cyhalothrin) (LCT) and (cypermethrin) (CYP) were investigated along with the rescuing potential of extra virgin olive oil (EVOO). The study comprised 60 male albino mice randomly distributed in 6 groups (n=10). The vehicle control group (VC) was maintained and treated with 0.1ml corn oil. The positive control group was treated with EVOO, whereas the (CYP) and (LCT) groups were treated with 5mg/kg of the respective insecticides for two consecutive days and corn oil for 4-6 days. The last 2 groups Cypermethrin+extra virgin olive oil (CYP+EVOO) and Lambda-cyhalothrin+extra virgin olive oil (LCT+EVOO) were treated with olive oil only on day 4-6 along with respective insecticide exposure on first two days. All animals were sacrificed on day 7 to recover body organs (Liver and Kidney). Results show various histopathological alterations both in Liver (enormously enlarged hepatocytes, disruption of hepatic cords, etc.) and kidney (lesions in the endothelial wall of bowman's capsule, endothelial cells apoptosis, etc.) on CYP and LCT exposures. Significant micrometric changes were also noted along with pathological signs. The olive oil post treatment groups have shown rehabilitative effects against the reported histopathologies. On the basis of these findings, it is concluded that both insecticides harbor hepato-renal histopathological potentials that are at least partially rescued on EVOO treatment. [ABSTRACT FROM AUTHOR]

In present study, comparative andrological histopathologies of Cypermethrin (CP) (a chlorinated type II pyrethroid) and Lambda-Cyhalothrin (LN) (a fluorinated type II pyrethroid) insecticide exposure and their amelioration with post treatment with Extra Virgin Olive oil (EVO) in testes, epididymis and vas deferens were explored. Sixty male albino mice (12-14 weeks old) were randomly distributed in six groups (n=10): 1. Negative Control (NC) is vehicle control so received 0.1mL corn oil on day 1&2, no treatment (day 3) and 0.1mL corn oil (day 4-6) through gavage; 2. Positive Control (PC) (the olive oil EVO antidote group) were given 0.1mL corn oil on day 1&2, no treatment (day 3) and 0.1mL EVO (day 4-6); 3,4) CP and LN were treated with 0.1mL of their respective 5mg/kg insecticides dissolved in corn oil on day 1&2, no treatment (day 3) and 0.1mL corn oil (day 4-6); 5,6) CP+EVO and LN+EVO were given 0.1mL of their respective 5mg/kg insecticides on day 1&2, no treatment (day 3) and 0.1mL EVO (day 4- 6). Animals were dissected on day 7 to recover testes, epididymis and vas deferens. Excised organs were processed for serial sectioning and micrometry. Exposure with CP and LN results in severe damage to seminiferous tubules and interstitial tissues of testes and endothelium of epididymis and vas deferens. Toxic effects were depicted as empty spaces in seminiferous tubules, interstitial tissues and epididymis and vas deferens, wavy margins of seminiferous tubules and corpus epididymis and necrosis in spermatogonia. Simultaneously the mean cross-sectional area of seminiferous tubules was significantly (p<0.05) decreased in CP (10.34±3.00µm2) and LN (12.63±3.23µm²) than PC (15.30±6.25 µm²) and NC (14.69±4.96µm²) groups. The EVO post treatment groups CP+EVO and LN+EVO indicate signs of rehabilitation in the mean CSA of seminiferous tubules (13.04±5.45µm², 13.07±5.80µm²) and interstitial tissues (30.47±0.67µm², 33.60±1.23µm²) as well as the mean number of spermatogonia. There was significant (P≤0.05) decrease in the mean epithelial height of caput (22.78±0.56µm², 22.42±0.49µm²), corpus (20.29±0.42µm², 20.15±0.55µm²) and cauda epididymis convoluted tubing (18.29±0.59µm², 17.93±0.52µm²) and epithelial thickness of vas deferens (29.17±1.49µm², 28.91±0.88 µm²) in CP and LN groups. The recovery signs of extra virgin olive oil in CP+EVO and LN+EVO groups were observed as rehabilitation in epithelial height of caput (23.58±0.49µm², 23.04±0.51µm²), corpus (20.97±0.54µm², 20.69±0.55 µm²) and cauda epididymis (21.43±0.65 µm2, 20.13±0.70 µm²) and epithelial thickness of vas deferens (34.06±1.07µm², 31.24±0.96µm²). The results indicate that both insecticides inflicted almost similar histopathologies which were convincingly recovered by the olive oil post treatment. It is thus concluded that irrespective of the presence of fluoride the type II pyrethroids can inflict severe testicular, epididymal and vas deferens damage in the exposed animals whereas the olive oil has immense rehabilitative capacity and thus can be used against insecticide inflicted testicular, epididymal and vas deferens histopathologies. [ABSTRACT FROM AUTHOR]

Cardio-genic disruptions of in utero exposure of a non-fluoridated Cypermethrin (CP) and a fluoridated λ-Cyhalothrin (LC) type 2 pyrethroid insecticide were explored in albino mice. Pregnant dams were divided into three groups (n=10); 1) Vehicle Control Group (VCG) (intra-gastric treatment of 0.1mL corn oil); 2) Cypermethrin Group (CPG) and; 3) λ-Cyhalothrin Group (LPG) (intra-gastric treatment of 5mg/kg Cypermethrin (CP) and λ-Cyhalothrin respectively in corn oil). These treatments were applied on 7--10th days of pregnancy. Embryos were removed from the gravid uteri of the euthanized dams on 18th day of pregnancy and fixed in formyl ethanol for 24hrs to finally remove their hearts for histological and histometric analyses. Both insecticides were found to cause micro-anatomical derangements like decreased ventricular wall thickness, rudimentary appearance or complete absence of inter-ventricular (AV) septa, abnormalities of the cardiac valves, and decreased thickness of the muscular layer of the aortic trunk. However, these disruptions were much more pronounced in LCG. Morphometric results revealed a significant decrease (P>0.05) in the thickness of left ventricular wall in CPG (295.90±12.3µ) and LCG (104.27±5.6µ) as compared to VCG (346.68±9.5µ). The mean thickness of interventricular septum was significantly decreased in CPG (440.03±20.4µ) and LCG (214.3±10.2µ) groups than the VCG (2641.75±186.2µ). The thickness of the aortic intima also showed a significant (P>0.05) decrease in CPG (12.70±0.25µ) and LCG (11.03±0.3µ) than the VCG (18.44±0.37µ). Similarly, the thickness of aortic adventitia remained significantly (P>0.05) lower in CPG (26.96±1.1µ) and LCG (23.97±1.5µ) than the VCG (41.09±2.1µ). The relative abundance of myocardiocytes and cardio-myoblasts (per 5000µ2) also showed significant decrease in both CPG (8.98 ±0.45, 2.50±0.24 respectively) and LCG (4.7 ±0.48, 6.26±0.79) to the VCG (18.19±0.56, 1.02±0.13). The results show that type-2 pyrethroid insecticides inflict a highly toxic impact on the developing heart in mammals and the fluoridated LC is more toxic than the CP in this context. [ABSTRACT FROM AUTHOR]

Cypermethrin (CN) is a type II pyrethroid insecticide that has recently been implicated in reproductive and developmental disorders. The aim of present study was to discover the potential role of vitamin E (vitE) and Olive oil (O) in alleviation of prenatal developmental abnormalities of CN exposure in the domestic chick. Fertilized eggs (60 each) were assigned to vehicle (C); CN, CNO, CNE and CNOE treated groups. Embryos from 20 eggs in each group were recovered on 7, 14 and 21days of incubation. Mean body weight of the hatchlings and the rate of hatching were significantly higher (P≤0.05) in all groups than that of the CN group. Abnormalities of in ovo CN exposure in 7 days old embryos included: growth retardation, reduced beak, microphthalmia, microcephaly, open eyes, abdominal edema and limb deformities. While the 14 and 21 days old embryos exhibited patchy plumage, congenital glaucoma, spina bifida occulta, and limb deformities. Rate of occurrence of these abnormalities were decreased with co-treatment of CN with olive oil or/and vitE. It was thus concluded that CN contained potent avian developmental disruption potentials while the co-treatment of vitamin E and/or olive oil have been found to curtail the chances of CN induced embryonic disruptions in developing chick. [ABSTRACT FROM AUTHOR]