Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East
Khaled El Baba, Mira S Zantout, Randa Akel, Sami T AzarDepartment of Internal Medicine, Division of Endocrinology and Metabolism, American University of Beirut Medical Center, Beirut, LebanonIntroduction: The discovery that many tissues express the vitamin D receptor and are able to transform the 25...
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ftdoajarticles:oai:doaj.org/article:d9ebb4507dc541df888a56e262d65916 2023-05-15T18:13:18+02:00 Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East El Baba K Zantout MS Akel R Azar ST 2011-09-01T00:00:00Z https://doaj.org/article/d9ebb4507dc541df888a56e262d65916 EN eng Dove Medical Press http://www.dovepress.com/seasonal-variation-of-vitamin-d-and-hba1c-levels-in-patients-with-type-a8218 https://doaj.org/toc/1178-7074 1178-7074 https://doaj.org/article/d9ebb4507dc541df888a56e262d65916 International Journal of General Medicine, Vol 2011, Iss default, Pp 635-638 (2011) Medicine (General) R5-920 article 2011 ftdoajarticles 2022-12-31T06:19:44Z Khaled El Baba, Mira S Zantout, Randa Akel, Sami T AzarDepartment of Internal Medicine, Division of Endocrinology and Metabolism, American University of Beirut Medical Center, Beirut, LebanonIntroduction: The discovery that many tissues express the vitamin D receptor and are able to transform the 25-hydroxyvitamin D into 1,25-dihydroxyvitamin D (active metabolite) has led to the hypothesis that vitamin D could have a role in the pathogenesis and prevention of diabetes mellitus. Accumulating evidence has linked vitamin D deficiency with immunological disturbance in type 1 diabetes mellitus. Several epidemiological studies have shown lower serum 25-hydroxyvitamin D concentrations in diabetic individuals compared to nondiabetic individuals.Patients and methods: A total of 105 Lebanese patients with type 1 diabetes mellitus were recruited. Levels of HbA1c and vitamin D were recorded during two phases with phase 1 being the period from June–September 2009 and phase 2 from January–April 2009.Results: Vitamin D levels at the end of sunny season (phase 2), reflecting the previous sunny months, were found to be higher than in the early summer season (phase 1) reflecting the previous cloudy months season, with a mean change of 0.70 ± 6.87 ng/mL (P = 0.029). HbA1c levels were higher in phase 2 than in phase 1 with an increase of 0.175% ± 1.46% (P = 0.113).Conclusion: Vitamin D levels were higher at the end of the sunny season than at the end of cloudy season. HbA1c was also lower (but not significantly so) in the early summer season (cloudy months). There was a weak correlation between seasonal changes of vitamin D levels and the control of blood glucose as monitored by HbA1c in a cohort of Lebanese patients with type 1 diabetes mellitus.Keywords: type 1 diabetes, vitamin D, HbA1c, seasonal variation Article in Journal/Newspaper sami Directory of Open Access Journals: DOAJ Articles Mira ENVELOPE(10.500,10.500,-70.417,-70.417) Randa ENVELOPE(7.672,7.672,62.741,62.741) |
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Directory of Open Access Journals: DOAJ Articles |
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English |
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Medicine (General) R5-920 |
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Medicine (General) R5-920 El Baba K Zantout MS Akel R Azar ST Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East |
topic_facet |
Medicine (General) R5-920 |
description |
Khaled El Baba, Mira S Zantout, Randa Akel, Sami T AzarDepartment of Internal Medicine, Division of Endocrinology and Metabolism, American University of Beirut Medical Center, Beirut, LebanonIntroduction: The discovery that many tissues express the vitamin D receptor and are able to transform the 25-hydroxyvitamin D into 1,25-dihydroxyvitamin D (active metabolite) has led to the hypothesis that vitamin D could have a role in the pathogenesis and prevention of diabetes mellitus. Accumulating evidence has linked vitamin D deficiency with immunological disturbance in type 1 diabetes mellitus. Several epidemiological studies have shown lower serum 25-hydroxyvitamin D concentrations in diabetic individuals compared to nondiabetic individuals.Patients and methods: A total of 105 Lebanese patients with type 1 diabetes mellitus were recruited. Levels of HbA1c and vitamin D were recorded during two phases with phase 1 being the period from June–September 2009 and phase 2 from January–April 2009.Results: Vitamin D levels at the end of sunny season (phase 2), reflecting the previous sunny months, were found to be higher than in the early summer season (phase 1) reflecting the previous cloudy months season, with a mean change of 0.70 ± 6.87 ng/mL (P = 0.029). HbA1c levels were higher in phase 2 than in phase 1 with an increase of 0.175% ± 1.46% (P = 0.113).Conclusion: Vitamin D levels were higher at the end of the sunny season than at the end of cloudy season. HbA1c was also lower (but not significantly so) in the early summer season (cloudy months). There was a weak correlation between seasonal changes of vitamin D levels and the control of blood glucose as monitored by HbA1c in a cohort of Lebanese patients with type 1 diabetes mellitus.Keywords: type 1 diabetes, vitamin D, HbA1c, seasonal variation |
format |
Article in Journal/Newspaper |
author |
El Baba K Zantout MS Akel R Azar ST |
author_facet |
El Baba K Zantout MS Akel R Azar ST |
author_sort |
El Baba K |
title |
Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East |
title_short |
Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East |
title_full |
Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East |
title_fullStr |
Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East |
title_full_unstemmed |
Seasonal variation of vitamin D and HbA1c levels in patients with type 1 diabetes mellitus in the Middle East |
title_sort |
seasonal variation of vitamin d and hba1c levels in patients with type 1 diabetes mellitus in the middle east |
publisher |
Dove Medical Press |
publishDate |
2011 |
url |
https://doaj.org/article/d9ebb4507dc541df888a56e262d65916 |
long_lat |
ENVELOPE(10.500,10.500,-70.417,-70.417) ENVELOPE(7.672,7.672,62.741,62.741) |
geographic |
Mira Randa |
geographic_facet |
Mira Randa |
genre |
sami |
genre_facet |
sami |
op_source |
International Journal of General Medicine, Vol 2011, Iss default, Pp 635-638 (2011) |
op_relation |
http://www.dovepress.com/seasonal-variation-of-vitamin-d-and-hba1c-levels-in-patients-with-type-a8218 https://doaj.org/toc/1178-7074 1178-7074 https://doaj.org/article/d9ebb4507dc541df888a56e262d65916 |
_version_ |
1766185817512869888 |