Lipid Biochemistry

Gurr, M. I.; Harwood, John L.

doi:10.1007/978-1-4615-3862-2

Cited by 82 publications

(96 citation statements)

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“…Krainev et al [55] have found that cholesterol content is higher in sarcoplasmic reticulum lipid extracts from old rats compared with lipid extracts from young and middle-aged rats. These results were consistent with reports of age-related accumulations of cholesterol in endoplasmic reticulum membranes from several different tissues [56]. This accumulation of cholesterol induced a rigidifying effect on the membrane altering the bilayer fluidity.…”

Section: Discussionsupporting

confidence: 94%

Activity Increase After Extraction of Alkaline Phosphatase from Human Osteoblastic Membranes by Nonionic Detergents: Influence of Age and Sex

Bourrat

Radisson

Chavassieux

et al. 2000

Calcified Tissue International

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The solubilization of alkaline phosphatase (AP) from osteoblastic cell membranes obtained from human primary bone cell cultures was studied according to the age and sex of the donors (17 females, 11 males; age range: 2-77 years). Cell membranes were treated by non-ionic (n-octyl beta-D-glucopyranoside, OG), ionic or zwitterionic detergents, then centrifuged. When OG was used almost all the AP was solubilized. AP activity in supernatant of solubilization was compared to the activity of the suspension before centrifugation. The activity ratio (AR) increased in function of age for subjects between 65 and 74. Neither total nor specific AP activities were influenced by age or sex. Electrophoresis studies showed that the AP released was a GPI (glycosyl phosphatidylinositol)-anchored protein, amphipathic form, with 140 kDa as apparent molecular mass. The activity change of AP in the presence of OG may result from age-related modifications either in the AP structure or in the constituents of the plasma membranes (proteins or phospholipids).

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Section: Discussionsupporting

confidence: 94%

Activity Increase After Extraction of Alkaline Phosphatase from Human Osteoblastic Membranes by Nonionic Detergents: Influence of Age and Sex

Bourrat

Radisson

Chavassieux

et al. 2000

Calcified Tissue International

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“…SQDG is located only in thylakoid membranes and is believed to ensure such a configuration of membranes that is optimal for active electron transport in PS II (Benning, 1993). The ratio between galacto-and sulfolipids, as well as the MGDG-to-DGDG ratio, which varied from 2.2 to 2.4, corresponded to the values characteristic of photosynthetic tissues of higher terrestrial plants (Gurr and Harwood, 1991). Under exposure to low concentrations of cadmium (1 and 10 µM), the curves that reflect the content of MGDG and SQDG in P. perfoliatus leaves during three days had an oscillatory mode, suggesting that the content of these compounds changed every day in opposite directions.…”

Section: Resultsmentioning

confidence: 93%

“…These phospholipids are located predominantly on the outer side of the membrane. The main function of PC, as well as other phospholipids, comes to maintaining the general bilayer structure of membranes (Gurr and Harwood, 1991;Gennis, 1997). It is also known that PC is involved in the formation of the cuticle (Goodwin and Merser, 1986).…”

Section: Resultsmentioning

confidence: 99%

“…Polar lipids (GLs and PLs) are the structural components of membranes; patterns of their distribution in the plasmalemma, endoplasmic reticulum, and organoids are different (Curr and Harwood, 1991;Harwood, 1998). Important components of photosynthetic membranes are galactolipids-monogalactosyldiacylglycerol (MGDG), digalactosyldiacylglycerol (DGDG), and the sulfolipid sulfoquinovosyldiacylglycerol (SQDG).…”

Section: Resultsmentioning

confidence: 99%

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The role of membrane lipids in the resistance of clapsing-leaved pondweed (Potamogeton perfoliatus L.) to excess of cadmium in water

Розенцвет

Мурзаева

Gushchina

2005

Biol Bull Russ Acad Sci

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INTRODUCTIONThe ingress of cadmium into the environment with industrial discharges and soil washing results in severe pollution of the environment. Cadmium concentration in water may exceed the maximum permissible concentration in dozens of times. This metal gets into bodies of animals and humans along food chains, through plants, and may cause chronic and epizootic diseases (Levina, 1972;Il'in, 1991). The physiological effect of excess cadmium on plants has been studied sufficiently well. It affects water exchange and biogenesis and suppresses the growth and development of plants (Mel'nuchyk, 1990;Breckle, 1991; Drazkiewicz et al ., 2003). As cadmium ions exhibit a high affinity for thiolcontaining groups in organic molecules, they may form strong metal-thiol complexes and substitute ions of other metals linked to these groups, which results in various disturbances in cell metabolism. In response to the toxic effect of cadmium, several programs aimed at survival and adaptation are realized in plants. They include limitation of cadmium entry, activation of the systems that ensure its excretion, as well as insulation of this cation in compartments with low metabolic activity and changes of metabolism that allow the toxic effect of cadmium to be decreased or the consequences of cadmium exposure to be eliminated (Seregin and Ivanov, 2001). Realization of one or another mechanism determines the ability of plants to accumulate cadmium and resistance to its excess. Aquatic plants, macrophytes, exhibit an increased ability to accumulate heavy metals (Gavrilenko and Zolotukhina, 1989;Guilizzoni, 1991). However, the mechanisms of detoxication in them remain poorly understood compared to those of terrestrial plants. A study of changes occurring in the biochemical composition of cells under exposure to different concentrations of cadmium allows the role of cell components in the origination of resistance of aquatic plants to heavy metals to be assessed and provides for a possibility of early diagnostics of aquatic environment pollution.The goal of this work was to study the effect of cadmium nitrate within a concentration range of 1-1000 µ M on the aquatic plant clasping-leaved pondweed ( Potamogeton perfoliatus ) growing in natural environment. The level of Cd 2+ accumulation and the content of total proteins, lipids, and chlorophylls in exposed plants were measured, and the ratio between individual lipid components that determine the structure and function of biological membranes was determined. MATERIALS AND METHODSThe study was performed with Potamogeton perfoliatus L.-attached flowering aquatic plants that are widespread in freshwater bodies. These plants, growing under various conditions, are of economic importance (serve as food for fish and birds) and are involved in self-purification of water (Kokin, 1982). Reservoirs isolating 10-12 plants with roots down to the bottom were placed in a shallow area of the Saratov Reservoir overgrown with thickets of P. perfoliatus. The reservoirs with plants contained 135-140 l o...

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“…By analogy to the single-chain phospholipids, the socalled lysophospholipids, such compounds could have an anomalously high toxicity due to their strong detergent properties. [36] This possibility was not further investigated.…”

Section: Gel Electrophoresis and Gene Transfection Of The Cationic Sumentioning

confidence: 99%

Cationic Gemini Surfactants Based on Tartaric Acid: Synthesis, Aggregation, Monolayer Behaviour, and Interaction with DNA

et al. 2002

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Lipid Biochemistry

Cited by 82 publications

References 0 publications

Activity Increase After Extraction of Alkaline Phosphatase from Human Osteoblastic Membranes by Nonionic Detergents: Influence of Age and Sex

Activity Increase After Extraction of Alkaline Phosphatase from Human Osteoblastic Membranes by Nonionic Detergents: Influence of Age and Sex

The role of membrane lipids in the resistance of clapsing-leaved pondweed (Potamogeton perfoliatus L.) to excess of cadmium in water

Cationic Gemini Surfactants Based on Tartaric Acid: Synthesis, Aggregation, Monolayer Behaviour, and Interaction with DNA

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