Wyniki wyszukiwania

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Tissue-specific effect of refeeding after short- and long-term caloric restriction on malic enzyme gene expression in rat tissues

100%

Stelmanska E., Korczynska J., Swierczynski J.

Acta Biochimica Polonica

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2004

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tom 51

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nr 3

Restricting food intake to a level below that consumed voluntarily (85%, 70% and 50% of the ad libitum energy intake for 3 or 30 days) and re-feeding ad libitum for 48 h results in an increase of malic enzyme (ME) gene expression in rat white adipose tissue. The increase of ME gene expression was much more pronounced in rats maintained on restricted diet for 30 days than for 3 days. The changes in ME gene expression resembled the changes in the content of SREBP-1 in white adipose tissue. A similar increase of serum insulin concentration was observed in all groups at different degrees of caloric restriction and refed ad libitum for 48 h. Caloric restriction and refeeding caused on increase of ME activity also in brown adipose tissue (BAT) and liver. However, in liver a significant increase of ME activity was found only in rats maintained on the restricted diet for 30 days. No significant changes after caloric restriction and refeeding were found in heart, skeletal muscle, kidney cortex, and brain. These data indicate that the increase of ME gene expression after caloric re- striction/refeeding occurs only in lipogenic tissues. Thus, one can conclude that caloric restriction/refeeding increases the enzymatic capacity for fatty acid biosynthesis.

2

Isolation and some properties of malic enzyme from the abdomen muscle of Antarctic krill Euphausia superba

100%

Napierska D., Skorkowski E. F.

Bulletin of the Sea Fisheries Institute

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2001

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nr 1

3

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Effect of cadmium and glutathione on malic enzyme activity in brown shrimps (Crangon crangon) from the Gulf of Gdansk

80%

Niedzwiecka N., Mika A., Bialek-Bielinska A., Stepnowski P., Skorkowski E. F.

Oceanologia

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2011

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tom 53

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nr 3

The high level of cadmium in the abdominal muscle of the brown shrimp Crangon crangon is due to the serious pollution of the water in the Gulf of Gdańsk. The inhibition of malic enzyme (ME) activity by cadmium, and in consequence the reduced formation of NADPH, could interfere with cellular mechanisms for detoxifying the organism and reducing oxidative stress. The reduced glutathione (GSH) concentration in the abdominal muscle of C. crangon was calculated to be 5.8 mM. The objective of this study was to evaluate the part played by GSH in the effect of cadmium on the activity of NADP-dependent malic enzyme from abdominal muscles of brown shrimps. This enzyme is activated by certain divalent cations (Mg, Mn). The results demonstrate that cadmium inhibits ME activity from shrimp muscle, and that GSH and albumin can reduce this cadmium-inhibited NADP-dependent malic enzyme activity.

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The effects of weight cycling on serum leptin levels and lipogenic enzyme activities in adipose tissue

80%

Kochan Z., Karbowska J., Swierczynski J.

Journal of Physiology and Pharmacology. Supplement

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2006

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tom 57

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nr 6

115-127

Weight cycling is one of the widely used weight reduction strategies; however, the adverse effects of this method include regaining significant amounts of weight. The molecular mechanisms underlying weight gain following cycles of dietary deprivation and refeeding are still poorly understood. One of the possibilities is that repeated loss and gain of weight may promote fat deposition in adipose tissue. To test this hypothesis we investigated serum leptin levels and lipogenic enzyme activities in white adipose tissue (WAT) of male Wistar rats during 12 days of ad libitum feeding following multiple cycles of alternating food deprivation and refeeding. Rats subjected to eight cycles of food deprivation and refeeding (MFR group) showed significantly decreased circulating leptin levels when compared with control rats (nearly 50% decrease in leptin levels, P < 0.01). Throughout 12 days of ad libitum feeding, serum leptin levels increased modestly but remained significantly (24%, P < 0.05) lower than control levels. Fatty acid synthase (FAS) and malic enzyme (ME) activities (chosen as representatives of enzymes directly involved in fatty acid synthesis) were found to be considerably higher in WAT of MFR rats refed for 3 days in comparison to control rats, and remained elevated even after 12 days of refeeding. These observations suggest that the elevation of lipogenic enzyme activities induced by multiple cycles of dietary deprivation followed by refeeding persists for several days, markedly increasing the lipogenic capacity of adipose tissue, which, accompanied by a decrease in circulating leptin levels, may promote weight gain.

5

Alteration of plasma membrane NADPH oxidase and NADP-recycling enzymes in cucumber roots stressed with cadmium

80%

Jakubowska D., Kabala K., Reda M., Janicka-Russak M.

BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology

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2013

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tom 94

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nr 2

6

Changes in the activities of carbon metabolizing enzymes with pod development in lentil [Lens culinaris L.]

80%

Chopra J., Kaur N., Gupta A. K.

Acta Physiologiae Plantarum

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2003

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tom 25

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nr 2

7

Comparison of short-term cadmium poisoning in the shrimp Crangon crangon from the Baltic Sea and the shrimp Palaemon serratus from the Atlantic Ocean with cadmium bioaccumulation and malic enzyme activity in abdomen muscle

70%

Napierska D., Thebault M. T., Pempkowiak J., Skorkowski E.

Oceanologia

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1997

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tom 39

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nr 2

Ograniczanie wyników

Tissue-specific effect of refeeding after short- and long-term caloric restriction on malic enzyme gene expression in rat tissues

Isolation and some properties of malic enzyme from the abdomen muscle of Antarctic krill Euphausia superba

Effect of cadmium and glutathione on malic enzyme activity in brown shrimps (Crangon crangon) from the Gulf of Gdansk

The effects of weight cycling on serum leptin levels and lipogenic enzyme activities in adipose tissue

Alteration of plasma membrane NADPH oxidase and NADP-recycling enzymes in cucumber roots stressed with cadmium

Changes in the activities of carbon metabolizing enzymes with pod development in lentil [Lens culinaris L.]

Comparison of short-term cadmium poisoning in the shrimp Crangon crangon from the Baltic Sea and the shrimp Palaemon serratus from the Atlantic Ocean with cadmium bioaccumulation and malic enzyme activity in abdomen muscle