Objective:To evaluate the consequence of oral administration of Calliandra portoricensis(C. portoricensis) leaf extract on the stomach and pancreas in Swiss albino mice.Methods:Three, groups of mice(B,C and D) were tr...Objective:To evaluate the consequence of oral administration of Calliandra portoricensis(C. portoricensis) leaf extract on the stomach and pancreas in Swiss albino mice.Methods:Three, groups of mice(B,C and D) were treated with 4 mg/kg of C.portoricensis extract.Croup A was the control and received an equivalent volume of distilled water.Group B received C.portoricensis leaf extract for 7 days.Croup C received C.portoricensis leaf extract for 14 days,and Croup D received C.portoricensis leaf extract for 28 days.At different stages in the study,the mice were sacrificed and the stomach and pancreas were excised and fixed in 10%formol saline for histological analysis.Results:The result showed a normal microstructural outline in groups B and C as compared with the control.However,animals in group D showed disorganization of the mucosa and discontinuation of epithelial lining of the stomach while the islets of Langerans in the pancreas were at various degree of degeneration as compared with the control mice. Conclusions:The present finding suggests that chronic administration(28 days as seen in this study) of C.portoricensis leaf extract may inhibit the proper function of the stomach and pancreas.展开更多
Objective:To assess ovicidal activity of three acetonic extracts from the leaves of three forage legume,Calliandra calotyrsus(C.calotyrsus),Gliricidia sepium(G.sepium) and Leucaena diversifolia(L.diversifolia) in vitr...Objective:To assess ovicidal activity of three acetonic extracts from the leaves of three forage legume,Calliandra calotyrsus(C.calotyrsus),Gliricidia sepium(G.sepium) and Leucaena diversifolia(L.diversifolia) in vitro on Haemonchus contortus(H.contortus).Methods:Eggs were exposed for 24 hours to five different concentrations(0.075,0.15,0.3,0.6 and 1.25 mg/mL) of acetonic extracts at room temperature(24℃).Distilled water and 0.4%Tween were used in the bioassay as negative controls.Results:The later did not affect embryonation and egg hatching of H.contortus.Conversively,significant effects were obtained with the acetonic extracts of leaves of all three plants and the maximum activity was observed with the highest concentration (1.25 mg/mL).The acetonic extract of G.sepium was found to be more active(2.9%and 0.0% for embryonation and egg hatching,respectively) than the other substances 16.5%and 33.5%, respectively for C.calothyrsus,33.7%and 33.3%,respectively for L diversifolia.Conclusions: These results suggest that the three forage legumes do possess ovicidal properties and further studies on larvae should be carried out.展开更多
Fermented Callliandra, Gliricidia and Leucaena browses and maize material （milk stage） were applied to the soil to determine their effect on soil productivity. Hopi Red Dye Amaranthus （Amaranthus cruentus） was use...Fermented Callliandra, Gliricidia and Leucaena browses and maize material （milk stage） were applied to the soil to determine their effect on soil productivity. Hopi Red Dye Amaranthus （Amaranthus cruentus） was used as the test crop. Its DM yield was determined. The browse materials had higher total N and narrower C：N ratio than the maize material. Calliandra material had higher levels of insoluble fiber （ADF）, fiber bound N （ADFN） and lignin. Application of the browse and maize materials raised C, N, and C：N ratio of the soil in which they were applied compared to the control soil. The treated soils maintained higher levels of C and N and a narrower C：N ratio up to the third crop. Amaranthus DM yield was highest （P 〈 0.05） with browse treatments. Treatment with maize material did not have DM yield advantage over the control soil. Treatments with browse materials could have given higher yields because the materials had more N and fermentation could not only have increased the proportion of soluble N, but also degradability of the materials, thus making the N and other nutrients in the fermented materials available for plant growth. DM yield was highest （P 〈_ 0.05） with the first and third crops but lowest （P 〈 0.05） with the second crop. Plant growth in the second crop could have coincided with high demand for the N by the soil micro-organisms decomposing the added materials. During the third crop, decomposition of the readily degradable components of the added materials could have been complete and the N became available for plant growth. DM yield dropped （P 〈 0.05） with the fourth crop as the available N could have been depleted from the soil for plant growth.展开更多
OBJECTIVE： Prostate cancer（PCa） is a major health concern. Calliandra portoricensis（CP） is traditionally known for its analgesic, anti-ulcerogenic and anticonvulsant properties. However, its antiproliferative pro...OBJECTIVE： Prostate cancer（PCa） is a major health concern. Calliandra portoricensis（CP） is traditionally known for its analgesic, anti-ulcerogenic and anticonvulsant properties. However, its antiproliferative properties for PCa still need to be investigated. METHODS： Antioxidant activities of CP were determined by 1,1-diphenyl-2-picryhydrazyl（DPPH） and hydroxyl（OH-） radicals-scavenging methods. PC-3 and LNCa P（androgen-refractory and androgendependent PCa-derived cell lines） were cultured and treated with CP（10, 50 and 100 μg/m L）. Effects of CP on cells were determined by cytotoxicity assay（lactate dehydrogenase, LDH） and viability assay（sodium 3′-[1-（phenylaminocarbonyl）-3,4-tetrazolium]-bis（4-methoxy-6-nitro） benzene sulfonic acid hydrate, XTT）. DNA fragmentation was detected by cell death detection enzyme-linked immunosorbent assay plus kit. CP was tested as an inhibitor of angiogenesis using chicken chorioallantoic membrane（CAM） assay. RESULTS： CP showed significant scavenging of DPPH and OH- radicals. CP significantly（P〈0.05） inhibited lipid peroxidation in a dose-dependent manner. Precisely, CP（10, 50 and 100 μg/m L） inhibited PC-3 and LNCa P growth by 7%, 74% and 92%, and 27%, 73%, and 85% respectively at 48 h. CP had low toxicity in vitro at its half inhibitory concentration dose. Detection of cell death induced by CP at 50 μg/m L showed higher enrichment factors in LNCa P（7.38±0.95） than PC-3（3.48±0.55）. Also, treatment with CP（50 μg/m L） significantly reduced network of vessels in CAM, suggesting its antiangiogenic potential. CONCLUSION： Calliandra portoricensis elicited antioxidant, antiangiogenic and antiproliferative effects in PCa cells.展开更多
A field experiment was conducted in the Western Highlands of Cameroon to study the effects of Calliandra calothyrsus, sterilized compost, non-sterilized compost and mineral fertilizers （NPK 11：11：22） on physical c...A field experiment was conducted in the Western Highlands of Cameroon to study the effects of Calliandra calothyrsus, sterilized compost, non-sterilized compost and mineral fertilizers （NPK 11：11：22） on physical characteristics, yield components and late blight disease severity of potato （Solanum tuberosum）. A two factorial treatment combination made up of fertilization schemes and sanitary measures were laid out in a randomized complete block design （RCBD） with four replicates and 10 treatments. Data collected were subjected to a multivariate ANOVA and means separated with the Dunnett t-test with Calliandra calothyrsus considered as the main treatment. Mineral fertilizers and Calliandra calothyrsus significantly augmented stem diameter, plant height and plant vigor, total and marketable yields, despite the fact that late blight severity was high in the two treatments. The correlation matrix showed that total yield had significant and positive correlation with stem diameter （r = 0.74）, plant height （r = 0.61）, plant vigor （r = 0.61） and marketable yield （r = 0.99） and negative correlation （r = -37） with late blight severity. The increase observed is attributed to the nutrient contents of the treatments applied. Leafy prunings of C. calothyrsus increase soil organic matter which probably improves moisture retention and biological activity. The highest late blight severity recorded between the 45 and 60 coincides with active development of plant canopy which influences disease severity and create a canopy microclimate conducive to disease development. This study suggests that Calliandra calothyrsus has the potential of improving potato production provided appropriate fungicide is used.展开更多
文摘Objective:To evaluate the consequence of oral administration of Calliandra portoricensis(C. portoricensis) leaf extract on the stomach and pancreas in Swiss albino mice.Methods:Three, groups of mice(B,C and D) were treated with 4 mg/kg of C.portoricensis extract.Croup A was the control and received an equivalent volume of distilled water.Group B received C.portoricensis leaf extract for 7 days.Croup C received C.portoricensis leaf extract for 14 days,and Croup D received C.portoricensis leaf extract for 28 days.At different stages in the study,the mice were sacrificed and the stomach and pancreas were excised and fixed in 10%formol saline for histological analysis.Results:The result showed a normal microstructural outline in groups B and C as compared with the control.However,animals in group D showed disorganization of the mucosa and discontinuation of epithelial lining of the stomach while the islets of Langerans in the pancreas were at various degree of degeneration as compared with the control mice. Conclusions:The present finding suggests that chronic administration(28 days as seen in this study) of C.portoricensis leaf extract may inhibit the proper function of the stomach and pancreas.
文摘Objective:To assess ovicidal activity of three acetonic extracts from the leaves of three forage legume,Calliandra calotyrsus(C.calotyrsus),Gliricidia sepium(G.sepium) and Leucaena diversifolia(L.diversifolia) in vitro on Haemonchus contortus(H.contortus).Methods:Eggs were exposed for 24 hours to five different concentrations(0.075,0.15,0.3,0.6 and 1.25 mg/mL) of acetonic extracts at room temperature(24℃).Distilled water and 0.4%Tween were used in the bioassay as negative controls.Results:The later did not affect embryonation and egg hatching of H.contortus.Conversively,significant effects were obtained with the acetonic extracts of leaves of all three plants and the maximum activity was observed with the highest concentration (1.25 mg/mL).The acetonic extract of G.sepium was found to be more active(2.9%and 0.0% for embryonation and egg hatching,respectively) than the other substances 16.5%and 33.5%, respectively for C.calothyrsus,33.7%and 33.3%,respectively for L diversifolia.Conclusions: These results suggest that the three forage legumes do possess ovicidal properties and further studies on larvae should be carried out.
文摘Fermented Callliandra, Gliricidia and Leucaena browses and maize material （milk stage） were applied to the soil to determine their effect on soil productivity. Hopi Red Dye Amaranthus （Amaranthus cruentus） was used as the test crop. Its DM yield was determined. The browse materials had higher total N and narrower C：N ratio than the maize material. Calliandra material had higher levels of insoluble fiber （ADF）, fiber bound N （ADFN） and lignin. Application of the browse and maize materials raised C, N, and C：N ratio of the soil in which they were applied compared to the control soil. The treated soils maintained higher levels of C and N and a narrower C：N ratio up to the third crop. Amaranthus DM yield was highest （P 〈 0.05） with browse treatments. Treatment with maize material did not have DM yield advantage over the control soil. Treatments with browse materials could have given higher yields because the materials had more N and fermentation could not only have increased the proportion of soluble N, but also degradability of the materials, thus making the N and other nutrients in the fermented materials available for plant growth. DM yield was highest （P 〈_ 0.05） with the first and third crops but lowest （P 〈 0.05） with the second crop. Plant growth in the second crop could have coincided with high demand for the N by the soil micro-organisms decomposing the added materials. During the third crop, decomposition of the readily degradable components of the added materials could have been complete and the N became available for plant growth. DM yield dropped （P 〈 0.05） with the fourth crop as the available N could have been depleted from the soil for plant growth.
基金supported by a 6-month grant given to OA by the Bank-Anthony Charitable Trust Will (UK) which was disbursed by the College of Medicine, University of Ibadan, Nigeria, Charite University of Medicine, Berlin and Urologic Research Foundation Berlin, Germany
文摘OBJECTIVE： Prostate cancer（PCa） is a major health concern. Calliandra portoricensis（CP） is traditionally known for its analgesic, anti-ulcerogenic and anticonvulsant properties. However, its antiproliferative properties for PCa still need to be investigated. METHODS： Antioxidant activities of CP were determined by 1,1-diphenyl-2-picryhydrazyl（DPPH） and hydroxyl（OH-） radicals-scavenging methods. PC-3 and LNCa P（androgen-refractory and androgendependent PCa-derived cell lines） were cultured and treated with CP（10, 50 and 100 μg/m L）. Effects of CP on cells were determined by cytotoxicity assay（lactate dehydrogenase, LDH） and viability assay（sodium 3′-[1-（phenylaminocarbonyl）-3,4-tetrazolium]-bis（4-methoxy-6-nitro） benzene sulfonic acid hydrate, XTT）. DNA fragmentation was detected by cell death detection enzyme-linked immunosorbent assay plus kit. CP was tested as an inhibitor of angiogenesis using chicken chorioallantoic membrane（CAM） assay. RESULTS： CP showed significant scavenging of DPPH and OH- radicals. CP significantly（P〈0.05） inhibited lipid peroxidation in a dose-dependent manner. Precisely, CP（10, 50 and 100 μg/m L） inhibited PC-3 and LNCa P growth by 7%, 74% and 92%, and 27%, 73%, and 85% respectively at 48 h. CP had low toxicity in vitro at its half inhibitory concentration dose. Detection of cell death induced by CP at 50 μg/m L showed higher enrichment factors in LNCa P（7.38±0.95） than PC-3（3.48±0.55）. Also, treatment with CP（50 μg/m L） significantly reduced network of vessels in CAM, suggesting its antiangiogenic potential. CONCLUSION： Calliandra portoricensis elicited antioxidant, antiangiogenic and antiproliferative effects in PCa cells.
文摘A field experiment was conducted in the Western Highlands of Cameroon to study the effects of Calliandra calothyrsus, sterilized compost, non-sterilized compost and mineral fertilizers （NPK 11：11：22） on physical characteristics, yield components and late blight disease severity of potato （Solanum tuberosum）. A two factorial treatment combination made up of fertilization schemes and sanitary measures were laid out in a randomized complete block design （RCBD） with four replicates and 10 treatments. Data collected were subjected to a multivariate ANOVA and means separated with the Dunnett t-test with Calliandra calothyrsus considered as the main treatment. Mineral fertilizers and Calliandra calothyrsus significantly augmented stem diameter, plant height and plant vigor, total and marketable yields, despite the fact that late blight severity was high in the two treatments. The correlation matrix showed that total yield had significant and positive correlation with stem diameter （r = 0.74）, plant height （r = 0.61）, plant vigor （r = 0.61） and marketable yield （r = 0.99） and negative correlation （r = -37） with late blight severity. The increase observed is attributed to the nutrient contents of the treatments applied. Leafy prunings of C. calothyrsus increase soil organic matter which probably improves moisture retention and biological activity. The highest late blight severity recorded between the 45 and 60 coincides with active development of plant canopy which influences disease severity and create a canopy microclimate conducive to disease development. This study suggests that Calliandra calothyrsus has the potential of improving potato production provided appropriate fungicide is used.
