Behavioural studies on the ethanol leaf extract of Grewia carpinifolia in Wistar rats

Background: Grewia carpinifolia is a plant commonly used in the tropics to manage various central nervous system (CNS) disorders. However, despite its widespread use no scientific work has been reported to validate these claims.Objectives: To evaluate the activity of G. carpinifolia as it affects behaviour using animal model.Methods: Twenty five adult Wistar rats were randomly divided into five groups (A-E). Group A served as control (given only distilled water), Groups B,C, D and E were administered with single oral dose of ethanol extract of G. carpinifolia leaf at 100, 200, 400 and 800 mg/kg body weight respectively for twenty eight days consecutively. Subsequently, open field test, negative geotaxis and hanging wire test were performed. Body and brain weights were measured and histological examination of the brain was also performed.Results: At the tested doses, the extract significantly increased the time spent on the hanging wire and decreased locomotor activity at 800 mg/kg. No significant difference was observed in body and brain weights of extract treated groups when compared with the control. No visible histological lesion was also observed.Conclusion: The plant extract may improve muscular strength at tested doses and possess CNS depressant activity at 800 mg/kg.Keywords: Grewia carpinifolia, negative geotaxis test, locomotor activity, Wistar rat

Behavioural studies on the ethanol leaf extract of Grewia carpinifolia in Wistar rats.

Background: Grewia carpinifolia is a plant commonly used in the tropics to manage various central nervous system (CNS) disorders. However, despite its widespread use no scientific work has been reported to validate these claims. Objectives: To evaluate the activity of G. carpinifolia as it affects behaviour using animal model. Methods: Twenty five adult Wistar rats were randomly divided into five groups (A-E). Group A served as control (given only distilled water), Groups B,C, D and E were administered with single oral dose of ethanol extract of G. carpinifolia leaf at 100, 200, 400 and 800 mg/kg body weight respectively for twenty eight days consecutively. Subsequently, open field test, negative geotaxis and hanging wire test were performed. Body and brain weights were measured and histological examination of the brain was also performed. Results: At the tested doses, the extract significantly increased the time spent on the hanging wire and decreased locomotor activity at 800 mg/kg. No significant difference was observed in body and brain weights of extract treated groups when compared with the control. No visible histological lesion was also observed. Conclusion: The plant extract may improve muscular strength at tested doses and possess CNS depressant activity at 800 mg/ kg

Astrocyte morphology, heterogeneity, and density in the developing African giant rat (Cricetomys gambianus)

Astrocyte morphologies and heterogeneity were described in male African giant rats (AGR; Cricetomys gambianus, Waterhouse) across three age groups (five neonates, five juveniles, and five adults) using Silver impregnation method and immunohistochemistry against glial fibrillary acidic protein. Immunopositive cell signaling, cell size and population were least in neonates, followed by adults and juveniles, respectively. In neonates, astrocyte processes were mostly detected within the glia limitans of the mid and hind brain; their cell bodies measuring 32 ± 4.8 μm in diameter against 91 ± 5.4 μm and 75 ± 1.9 μm in juveniles and adults, respectively. Astrocyte heterogeneity in juvenile and adult groups revealed eight subtypes to include fibrous astrocytes chiefly in the corpus callosum and brain stem, protoplasmic astrocytes in the cortex and dentate gyrus (DG); radial glia were found along the olfactory bulb (OB) and subventricular zone (SVZ); velate astrocytes were mainly found in the cerebellum and hippocampus; marginal astrocytes close to the pia mater; Bergmann glia in the molecular layer of the cerebellum; perivascular and periventricular astrocytes in the cortex and third ventricle, respectively. Cell counts from twelve anatomical regions of the brain were significantly higher in juveniles than in adults (p ≤ 0.01) using unpaired student t-test in the cerebral cortex, pia, corpus callosum, rostral migratory stream, DG, and cerebellum. Highest astrocyte count was found in the DG, while the least count was in the brain stem and sub cortex. Astrocytes along the periventricular layer of the OB are believed to be part of the radial glia system that transport newly formed cells towards the hippocampus and play roles in neurogenesis migration and homeostasis in the AGR. Therefore, astrocyte heterogeneity was examined across age groups in the AGR to determine whether age influences astrocytes population in different regions of the AGR brain and discuss possible functional roles

Global Economic Recession: The Place of Biotechnology

Human cytomegalovirus (CMV) is a leading cause of congenital infections worldwide Women infected for the first time during pregnancy are especially likely to transmit CMV to their fetuses and has been proposed as a risk factor for preterm birth. The seroprevalence of CMV in adults and the incidence of congenital CMV infection are highest in developing countries (1 to 5% of births) 90% of infected infants are asymptomatic at birth and are not recognized as at risk for CMV-associated infection. This study was carried out to determine the prevalence rate of CMV infection among pregnant women attending an antenatal clinic. In this study, Two-hundred and eighty eight (288) pregnant women were enrolled. Questionnaires were issued to volunteer subjects after due consent was sought, to determine demographic and other relevant data. 5mls of blood was collected by venous puncture from the antecubital fossa and dispensed into plain containers; sera were collected after centrifugation of the blood. Sera obtained were screened for the presence of CMV (IgM) antibodies using ELISA technique (Clinotec Laboratories Canada).Result showed that out of the 288 women tested, 54 (18.8%) were positive for CMV antibodies while 234 (81.2%) tested negative. With regards to age group distribution, women within 15 – 20 years had a prevalence rate of 4.5%, 21 – 30 years both had 3.5%, 31 – 35 had 3.1%, 36 – 40 years had 1.3% while 41 – 45 years had a prevalence rate of 2.8%, all the age groups had no statistical significant (P>0.05) result. With regards to trimester of the volunteer subjects screened, 1st, 2nd and 3rd trimester subjects recorded a prevalence rate of 3.1%, 9.4% and 6.2% respectively which was statistically significant (P0.05).Occupational status of subjects studied recorded no statistical significant (P0.05) result obtained showed that unemployed subjects recorded a prevalence of 5.6% compared to the self-employed with 4.9%, farmers recorded 3.8%, while students had a prevalence of 1.7% however subjects who are civil servants recorded a prevalence of 2.8%. Location of volunteer subjects studied showed that pregnant in rural areas had a prevalence rate of 12.2% while those living in urban areas recorded 6.6% prevalence without any statistical significant (P0.05).Records from this study indicates the of presence of CMV (Igm) antibodies amongst the subjects screened. Hence the need for early detection of the virus in pregnant women

A case of polydactyly in the hind-limbs of a West African Dwarf goat in South-West Nigeria

This report describes a case of polydactyly in the hind-limb of a West African Dwarf goat kid in South West Africa. Physical examination revealed the presence of four digits in each of the hind limbs. Radiological examination and macerated bones of the animal showed a bifid shape of each metatarsal that was more prominent from the distal half of the diaphysis. This resulted in the presence of four articulating surfaces per limb at the distal extremity. Though this condition is rare in goats, we advise that continuous reporting by researchers can give a better prevalence statistics of these occurrences

Attenuation of Vanadium-Induced Neurotoxicity in Rat Hippocampal Slices (In Vitro) and Mice (In Vivo) by ZA-II-05, a Novel NMDA-Receptor Antagonist

Exposure to heavy metals, such as vanadium, poses an ongoing environmental and health threat, heightening the risk of neurodegenerative disorders. While several compounds have shown promise in mitigating vanadium toxicity, their efficacy is limited. Effective strategies involve targeting specific subunits of the NMDA receptor, a glutamate receptor linked to neurodegenerative conditions. The potential neuroprotective effects of ZA-II-05, an NMDA receptor antagonist, against vanadium-induced neurotoxicity were explored in this study. Organotypic rat hippocampal slices, and live mice, were used as models to comprehensively evaluate the compound’s impact. Targeted in vivo fluorescence analyses of the hippocampal slices using propidium iodide as a marker for cell death was utilized. The in vivo study involved five dams, each with eight pups, which were randomly assigned to five experimental groups (n = 8 pups). After administering treatments intraperitoneally over six months, various brain regions were assessed for neuropathologies using different immunohistochemical markers. High fluorescence intensity was observed in the hippocampal slices treated with vanadium, signifying cell death. Vanadium-exposed mice exhibited demyelination, microgliosis, and neuronal cell loss. Significantly, treatment with ZA-II-05 resulted in reduced cellular death in the rat hippocampal slices and preserved cellular integrity and morphological architecture in different anatomical regions, suggesting its potential in countering vanadium-induced neurotoxicity

Some aspects of the craniofacial indices and macro neurometrics of the Nigerian local pig (Sus scrofa)

This study is about the craniofacial indices and neuromorphometrics of the Nigerian local pig and has been performed on twelve males and fourteen females of ages one and a half to two years. The average values obtained for the tongue length, tongue weight, rasp length, left pinna length, right pinna length, left pinna width, right pinna width, height of left external nares, height of right external nares and the rima oris length were 17±1.3 cm, 90±16 g, 4.6±0.58 cm, 13±1.3 cm, 13±1.3 cm, 8.7±1.5 cm, 8.7±1.4 cm, 0.98±0.12 cm, 0.96±0.13 cm and 19.51±2.89 cm respectively, while the mean brain weight, mean brain length, cerebrum and cerebellum lengths, brain and cerebellar heights were 84±12 g, 6.9±1.5 cm, 4.9±1.7 cm, 2.2±1.0 cm, 5.2±0.88 cm and 3.0±1.1 cm respectively. There was a negative correlation between the weight of the animal and the height of the cerebellum, the length of cerebrum and length of the cerebellum and between the weight of the head and height of the cerebellum. A positive correlation was however observed between the length of brain and the weight of brain, and between the length of the cerebrum and weight of brain. The cerebral length was statistically longer (P < 0.01) in the males than the females. The data obtained from this study will provide added information in the field of comparative anatomy and porcine neuroanatomy research

Investigation of the osteometry of the skull of the one-humped camels. Part II: sex dimorphism and geographical variations in adults

Sexual dimorphism in the skull of different species has been of importance in archaeological, forensic and anatomical studies; also, a variation in phenotypic and genetic traits across geographic space is a recurring phenomenon in biological species. This study investigated 10 adult camels from each of three geographical locations in northern Nigeria, for sex- and location-based variations in the skulls. In one location, male skulls had greater absolute osteometric values but there were no significance differences in relative proportions between sexes. Moreover, all index values (skull, cranial and facial) indicate no sexual dimorphism in all locations. There were some variations in the osteometry of the frontal region, and neurocranial volume between the locations. In addition it was observed that the skull index of Nigerian camels was similar to the Malha type documented in literature but wide variations exist in many other craniometric dimensions of the skull. This suggests a definite difference in phenotype and probable origin

Osteometry of the skull of one-humped camels. Part I: immature animals

The aim of this study was to investigate osteometric indices of immature camels (2-3 years old) in Nigeria. The cranial length, viscerocranial length, maximum zygomatic width, neurocranial volume, skull and facial index for females and males were 22.1 cm and 22.3 cm; 16.3 cm and 16.7 cm; 15.8 cm and 16.1 cm; 479 ml and 496 ml; 40.9 and 41.3, and 96.4 and 96.2 respectively. The mean orbital horizontal and vertical diameters of young camels were similar to each other giving a near complete circular shape. The foramen magnum index was over 100 because of a relatively higher height than width. The data were compared with those of other types of immature camels in the literature and will be useful for anatomical, developmental, anthropological and clinical studies of camels

Detection of Hepatitis C Virus (HCV) antibodies among HIV Seropositive women attending a Rehabilitation centre.

Co-infection with human immunodeficiency Virus HIV and (HCV) is becoming a major global problem, leading to increased morbidity and mortality in both developed and developing countries. This research hence examines the risk factors and transmission of HIV and HCV co-infection. Two hundred and ninety (290) subjects were screened, with HCV global immunochromatographic test kit. Possible risk factors to co-infectious status of subject were determined using a well-structured questionnaire. Out of the 290 sera tested, 25 (8.6%) were positive for HCV antibodies. Considering Age of subjects screened, females aged 11-20 years recorded a high positivity of 3.1 %,( X2 = 2.755, P-value = 0.839; P>0.05).Marital status of subjects showed that single subjects recorded 13(4.5%), (X2 = 0.679,P-value = 0.712 ; P > 0.05)positivity compared to married subjects with 4.1%. There were no significant correlations between HCV infection with Age and Marital Status; P - values = 0.839 and 0.712 respectively (i.e P > 0.05). Significant correlation was found between HCV antibodies and educational status, (Value x2 = 7.957,P-value = 0.047; P < 0.05).However, Volunteers with secondary school level of education recorded 10(3.4%) positivity. The result obtained showed that Seroprevalence to HCV antibodies in this study was high, hence the need for its early diagnosis among HIV patients is strongly advocated to reduce the risk of further complications among these subjects