The cyanobacterial species are ubiquitous in tropical regions, and its successful invasion into temperate zones has been partially attributed to its ability of survival in low P availability and the existence of multiple ecotypes. To explore the physiological response of different strains to phosphorus fluctuations, four strains of isolated from the Zhenhai Reservoir were used to investigate their growth and alkaline phosphatase (ALP) activity at different inorganic phosphorus (Pi) concentrations (HP=7.13 mg ·L, MP=0.64 mg ·L, LP=0.03 mg ·L) and different phosphorus forms [dipotassium hydrogen phosphate (KHPO), sodium pyrophosphate (KP O), sodium polyphosphate (KPO), D-glucose-6-phosphate (D-G-6-P), adenosine triphosphate (ATP), cyclic adenosine monophosphate (cAMP)]. Four strains showed a similar growth response to phosphate changes: their biomass increased with an increase in Pi concentrations, while the ALP activity showed the opposite trend. The ALP activity of N8 was significantly lower than that of other three strains, regardless of inorganic phosphorus concentrations, suggesting that this strain had a higher adaptability to phosphorus fluctuations. When cultured with different phosphorus forms, the biomass of N8 and N9 in three dissolved inorganic phosphorus (DIP) compounds were significantly higher than those in three dissolved organic phosphorus (DOP) compounds, with the maximum and minimum specific growth rate in KHPOand ATP treatments, respectively. preferred DIP although they can also utilize DOP to sustain its growth. Under the DOP conditions, the ALP activity of N8 in the ATP treatment was significantly higher than that in the other two organic phosphorus compounds, while we did not observe similar results in N9, indicating that strain N8 was more sensitive to DIP deficiency. Our results showed an intraspecific variation within strains from the same reservoir. Compared with the other strains, strain N8 represented better adaptability to phosphorus fluctuations and DIP deficiency. Variations within strains may make this species more adaptable to environmental changes and enhance its competitive advantage.
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http://dx.doi.org/10.13227/j.hjkx.201912180 | DOI Listing |
BMC Pharmacol Toxicol
January 2025
Biochemistry Department, Faculty of Science, Ain-Shams University, Cairo, Egypt.
Hepatic encephalopathy (HE) is a syndrome that arises from acute or chronic liver failure. This study was devised to assess the impact of a combination of boswellic acid (BA) and low doses of gamma radiation (LDR) on thioacetamide (TAA)-induced HE in an animal model. The effect of daily BA treatment (175 mg/kg body weight, for four weeks) and/or fractionated low-dose γ-radiation (LDR; 0.
View Article and Find Full Text PDFAlthough the toxic effect of Sedentary behavior (SED) on bone health has been demonstrated in the previous study, the underlying mechanisms of SED, or break SED to bone health remain unclear. In this study, we aim to investigate the effects of sedentary behavior (SED) on bone health, as well as the potential favor effects of moderate to vigorous physical activity (MVPA) and periodic interruptions of SED. To simulate SED, we used small Plexiglas cages (20.
View Article and Find Full Text PDFJ Adv Res
January 2025
College of Animal Science and Technology, Nanjing Agricultural University, Weigang 1, Nanjing 210095, China. Electronic address:
Introduction: Hypoxia, a condition characterized by inadequate oxygen supply to tissues, triggers various cellular responses, including apoptosis. The RNA demethylase FTO has been shown to exert anti-apoptotic effects, but its functions independent of RNA demethylase-particularly those involving protein-protein interactions-during hypoxia remain unclear.
Objectives: This study aimed to elucidate the cytoprotective mechanism of FTO in preventing apoptosis under hypoxic stress.
Regen Biomater
November 2024
Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Prince of Songkla University, Hatyai 90110, Thailand.
Alveolar ridge loss presents difficulties for implant placement and stability. To address this, alveolar ridge preservation (ARP) is required to maintain bone and avoid the need for ridge augmentation using socket grafting. In this study, a scaffold for ARP was created by fabricating a 3D porous dense microfiber silk fibroin (mSF) embedded in poly(vinyl alcohol) (PVA), which mimics the osteoid template.
View Article and Find Full Text PDFJ Mol Cell Cardiol Plus
March 2024
Institute of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
Sacubitril/valsartan (Sac/Val) belongs to the group of angiotensin receptor-neprilysin inhibitors and has been used for the treatment of heart failure (HF) for several years. The mechanisms that mediate the beneficial effects of Sac/Val are not yet fully understood. In this study we investigated whether Sac/Val influences the two proteolytic systems, the ubiquitin-proteasome system (UPS) and the autophagy-lysosomal pathway (ALP), in a mouse model of pressure overload induced by transverse aortic constriction (TAC) and in human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) treated with endothelin-1 (ET1) serving as a human cellular model of hypertrophy.
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