How free-floating macrophytes influence interactions between planktivorous fish and zooplankton in tropical environments? An in-lake mesocosm approach

Santos, Natan Guilherme dos; Stephan, Ligia Roma; Otero, A. R.; Iglesias, Carlos; Castilho-Noll, Maria Stela Maioli

doi:10.1007/s10750-020-04194-1

Cited by 24 publications

(6 citation statements)

References 60 publications

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“…Tumor inhibition (%) = {(Tv(blank)-Tv(study))/Tv(blank)}100 …………… (2) where Tv = average tumor volume.…”

Section: Evaluation Of Parametersmentioning

confidence: 99%

“…In addition, due to limited screening techniques, most patients are diagnosed with advanced disease. Thus, for most subjects, diagnosis of the disease occurs late, such that its mortality rate is the highest among gynecological malignant tumors, and it is the most severe disease that seriously threatens women's health [1][2]. At present, platinum and paclitaxel combination is the main pancreatic chemotherapeutic regimen for postoperative treatment of ovarian cancer, but long-term application makes the tumor cells acquire drug resistance, resulting in poor efficacy of subsequent chemotherapy [3].…”

Section: Introductionmentioning

confidence: 99%

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Effect of paclitaxel octreotide conjugate on human ovarian paclitaxel-resistant cell xenograft tumor model and the mechanism underlying reversal of paclitaxel resistance

Guo,

Ma,

Yuan

et al. 2023

Trop. J. Pharm Res

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Purpose: To determine the effect of paclitaxel octreotide conjugate (POC) on human ovarian paclitaxelresistant cell xenograft tumor model and the mechanism underlying reversal of paclitaxel resistance. Methods: Forty female BALB/c-nu/nu mice were subcutaneously inoculated with 106 paclitaxel-resistant cells (a2780/taxol) per mouse during the logarithmic growth phase of ovarian cancer. They were randomly divided into four groups (control, octreotide, paclitaxel and POC). Immunohistochemical streptavidin-peroxidase (SP) method was used to determine expression of nuclear proliferation antigen (PCNA) while TUNEL method was used to assess apoptosis of human ovarian cancer metastasis. Realtime polymerase chain reaction (PCR) was used to assay mRNA expression levels of somatostatin receptor 2 (SSTR2), multidrug-resistant gene (MDR1), vascular endothelial growth factor (VEGF), matrix metalloproteinase-9 (MMP-9), and acetylated tubulin (α-tubulin and β-III-tubulin), while the corresponding protein expressions were assayed using western blotting. Results: Immunohistochemical SP showed significantly lower PCNA levels in octreotide, paclitaxel and POC groups than in control mice, but that of POC mice was significantly reduced, relative to those of octreotide and paclitaxel groups (p < 0.05). There were significantly higher expression levels of SSTR2 mRNA and protein in octreotide, paclitaxel and POC groups than in control mice, but they were significantly higher in POC group than in octreotide and paclitaxel groups (p < 0.05). The mRNA and protein expressions of other factors in POC mice were significantly lower than those in both octreotide and paclitaxel groups (p < 0.05). Conclusion: Paclitaxel-octreotide conjugate effectively inhibits the growth of a2780/taxol xenografts in nude mice, induces tumor cell apoptosis, and suppresses tumor cell growth via mechanism involving enhancement of SSTR2 expression, and decreases in levels of acetylated tubulin, matrix metalloproteinase-9, and vascular endothelial growth factor.

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“…Tumor inhibition (%) = {(Tv(blank)-Tv(study))/Tv(blank)}100 …………… (2) where Tv = average tumor volume.…”

Section: Evaluation Of Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of paclitaxel octreotide conjugate on human ovarian paclitaxel-resistant cell xenograft tumor model and the mechanism underlying reversal of paclitaxel resistance

Guo,

Ma,

Yuan

et al. 2023

Trop. J. Pharm Res

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“…The changes in the sediment content and water level affect the community status of the river animals [16] and the habitat characteristics [17]. The changes in the water quantity and depth have direct effects on the animal communities [18], plant diversity [19], and leaf characteristics [20] in the lake, and the evolution of the lake's landscape pattern plays a significant role in the regional ecosystem service value [21]. As a common intermittent wetland system, ponds and ditches play a unique role in affecting the physiological traits of plants [22], maintaining biodiversity [23], degrading agricultural pollution [24], regulating the regional carbon cycle [25], and changing the regional hydrological conditions [26].…”

Section: Introductionmentioning

confidence: 99%

Ecological Effects of Surface Water Evolution in the Yellow River Delta

Huang

Kong

et al. 2022

Sustainability

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With the ecological protection and high-quality development of the Yellow River Basin rising to China’s national strategy, the Yellow River Delta is facing a historic development opportunity, and the surface water problems in this region are becoming more and more severe. Owing to the dual effects of the swing of the Yellow River’s channel and human activities, the surface water in the Yellow River Delta is in an evolving state. Consequently, it is important to pay attention to the ecosystem response caused by surface water evolution for the ecological protection and high-quality development of the Yellow River Delta. Drawing on ecological, economic, and network analysis, in this study, the ecological service and landscape effects of the surface water evolution in the Yellow River Delta from 1986 to 2019 are explored using remote sensing and socioeconomic data. The results are as follows: (1) The surface water in the Yellow River Delta has evolved significantly in the last 35 years. Artificial water accounted for the dominant proportion of the total water, and the composition of water tended to be remarkably heterogeneous. (2) The ecological services of the surface water in the delta increased significantly during the study period. The ecological services of the surface water improved to varying degrees except for sedimentary land reclamation. Tourism, materials production, and water supply became the leading service functions of the surface water in the Yellow River Delta. The proportion of cultural functions rose rapidly, and the share of regulatory functions shrank significantly. (3) The evolution of the surface water had an evident impact on the landscape pattern of the Yellow River Delta, which was manifested as physical cutting and spatial attraction. This demonstrates the comprehensive effect of protective constraints, spatial attraction, and spatial exclusion on the landscape pattern of regional land types. The results of this study have a certain guiding significance for the development and management of the water resources in the Yellow River Delta and also provide information for ecological protection in this region.

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“…The macrophyte community (hereafter ''macrophytes'') is considered a key element in freshwater ecosystems, especially in shallow ones (Scheffer, 2004;Jeppesen et al, 2007a, b). These plants change the physical and chemical environment (Bini et al, 2010;Pinero-Rodriguez et al, 2020), participate intensively in nutrient cycling (Carignan & Kalff, 1980;Wetzel, 2001;Wahl et al, 2021), produce biomass which is used by herbivores and detritivorous (Martinez et al, 2013;Peel et al, 2019;Franceschini et al, 2020) and provide habitat for other communities (Dibble et al, 2006;Dibble & Thomaz, 2009;Gething et al, 2020;Deosti et al, 2021), with consequences for higher trophic levels (Gomes et al, 2012;dos Santos et al, 2020;Paz Cardozo et al, 2021;Yofukuji et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Ecosystem services provided by freshwater macrophytes

Thomaz

2021

Hydrobiologia

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Macrophytes are considered key components of aquatic ecosystems and they also provide multiple benefits for humans. In this review, I identified and exemplified 26 types of ecosystem services provided by macrophytes. The most important supporting services provided by these plants are related to nutrient cycling and provisioning of habitat, but macrophytes also participate in water cycling and gases production. The presence of macrophytes and their activity enhance water purification and disease control which are important regulating services. Provisioning services are provided in the form of food at the local and global scale (e.g., rice), fiber, biochemicals, natural medicine and ornamental resources. Cultural services are provided in the form of spiritual and religious artifacts and local knowledge systems of communities which depend on macrophytes for surviving. Other cultural services are associated with educational activities, art inspiration, esthetic values in aquatic gardens and ponds, uses for leisure, recreation and ecotourism. There is evidence that the efficiency of ecosystem functioning, the provision of ecosystem services and ecosystem stability is enhanced by macrophyte diversity. Because macrophyte communities provide important benefits for humans, their conservation and restoration, where necessary, are important for human well-being.

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How free-floating macrophytes influence interactions between planktivorous fish and zooplankton in tropical environments? An in-lake mesocosm approach

Cited by 24 publications

References 60 publications

Effect of paclitaxel octreotide conjugate on human ovarian paclitaxel-resistant cell xenograft tumor model and the mechanism underlying reversal of paclitaxel resistance

Effect of paclitaxel octreotide conjugate on human ovarian paclitaxel-resistant cell xenograft tumor model and the mechanism underlying reversal of paclitaxel resistance

Ecological Effects of Surface Water Evolution in the Yellow River Delta

Ecosystem services provided by freshwater macrophytes

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