Seasonal variation of serum 25-hydroxyvitamin D in patients with chronic renal failure treated by regular haemodialysis

Cook, David B.; Pierides, Alkis; Shannan, G.

doi:10.1016/0009-8981(77)90104-8

Cited by 9 publications

(4 citation statements)

References 22 publications

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“…The finding that the plasma concentration of 25-OH vitamin D is lower than normal in patients with terminal renal failure is in accord with two previous reports from Great Britain (Cook, Pierides & Shannan, 1977;Peacock, Aaron, Walker & Davison, 1977), and is also in agreement with reports from France, Germany, Poland, Israel and Japan (Bayard, Bec, Ton That & Louvet, 1973;Offermann, von Herrath & Schaefer, 1974;Pietrek & Kokot, 1977;Shany, Kushelevsky & Berlyne, 1971;Ohhara, 1978). In contrast, workers from Denmark (Nielsen, Sorenson, Lund, Barenholdt, Munck & Pedersen, 1976) and the U.S.A. (Goldstein, Oda, Kurokawa & Massry, 1977) have found normal or elevated concentrations.…”

Section: Discussionsupporting

confidence: 92%

“…The rise in plasma concentration after a year is presumably due to the improved appetite and nutrition associated with maintenance haemodialysis. The seasonal variation of plasma 25-OH vitamin D in our patients follows a similar pattern to that seen in normal subjects (Stamp & Round, 1974) and is in line with previous observations in patients on maintenance haemodialysis (Cook et al, 1977).…”

Section: Discussionsupporting

confidence: 92%

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Plasma 25-Hydroxy-Vitamin D in Normal Subjects and Patients with Terminal Renal Failure, on Maintenance Haemodialysis and after Transplantation

et al. 1979

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1. Plasma 25-hydroxy-vitamin D concentration was measured in 40 normal subjects, 19 patients with terminal renal failure, 137 patients who had been on dialysis up to 11 years and in 17 renal transplant patients. 2. The mean plasma concentration of 25-hydroxy-vitamin D was below normal in patients with terminal renal failure and in patients who had been on maintenance haemodialysis for less than 1 year. The mean concentration in patients who had been on dialysis for more than 1 year and in renal transplant patients was normal. 3. The seasonal variation of plasma 25-hydroxy-vitamin D concentration found in the 58 patients on maintenance haemodialysis for more than 2 years is similar to that reported in normal subjects.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionsupporting

confidence: 92%

Plasma 25-Hydroxy-Vitamin D in Normal Subjects and Patients with Terminal Renal Failure, on Maintenance Haemodialysis and after Transplantation

et al. 1979

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“…It is well established that there is a sea sonal change in the blood levels of 2 5-hy droxy vitamin D (25-OHD) in normal and diseased subjects [5,18]. The aim of this study was to show a possible relationship between seasonal change in plasma 25-OHD and ALP in normal subjects.…”

Section: Introductionmentioning

confidence: 91%

Seasonal Changes in the Activity of Serum Alkaline Phosphatase

Ms¹,

Cr²,

Bt³

1981

Enzyme

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This paper reports a seasonal variation in alkaline phosphatase (ALP) levels in the serum, with low values occurring in summer and high in winter. These variations were found both in indoor and outdoor workers and in a group of elderly women in a long-stay ward. The seasonal change in ALP was in the opposite direction to the seasonal change in the serum levels of 25-hydroxyvitamin D. No such change was seen in the serum levels of gamma- glutamyltransferase. It is suggested that the seasonal change in plasma ALP could be due to changes in the bone isoenzyme. Serum levels of calcium remained unchanged; the change in ALP may reflect a homeostatic mechanism controlling plasma calcium, which compensates for seasonal variations in vitamin D supply.

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“…Both measurements were done in winter, in order to avoid the proven seasonal fluctuations [5]. Plasma 25(OH) levels were determined by a radiocompetition method (protein binding) (normal range 20-60 ng/ml).…”

Section: Dear Sirmentioning

confidence: 99%