Category Archives: Vitamins

Allergy, Genetics, Vitamins

ORMDL3 graduated

Given my sceptical view that ORMDL3 is really an asthma gene (that may be even shared by the authors of the initial association) the train has now departed with more groups speculating about ORMDL3 function.
For example this new paper by Gerard Cantero-Recasens is about the unfolded protein response (UPR) that may be triggered by a putative loss of function mutation in ORMDL3 via a Ca2+ decrease in the ER. Although I am quite intrigued about the fact that the story now moves to calcium and vitamin D, we are far away from any conclusive evidence.

Addenddum 3.3.2010

And here is another paper that associates ORMDL3 to the sphingolipid metabolism. Although that may be also an interesting pathway (given a bulk of literature not cited in the paper ( more, more, more, more) I still wonder if this is wishful thinking. The authors do not touch the main problem – the weak connection of some genomic variants in that region to ORMDL3 function to asthma pathogenesis.

 

CC-BY-NC Science Surf 24.10.2009, access 18.10.2025
Allergy, Vitamins

Tired of the hygiene hypothesis

A new Thorax review finds

The hypotheses have arisen from a desire to explain epidemiological differences, and those such as the “hygiene” hypothesis had a seemingly corroboratory immunological explanation. However, they have not taken us to the point where we can proudly announce a primary preventive strategy.

I agree with the last statement but have severe doubts on any “immunological explanation” Continue reading Tired of the hygiene hypothesis →

 

CC-BY-NC Science Surf 22.10.2009, access 18.10.2025
Allergy, Vitamins

Neverending story – vitamin D in pregnancy

screenshot1A new study of 5 year old children relates their current allergy symptoms to LOW maternal intake of vitamin D from food (which is strange within the context of current cohort studies that show a INCREASED risk by vitamin D supplement use).

As this is a diabetes study, the sample is highly biased Continue reading Neverending story – vitamin D in pregnancy →

 

CC-BY-NC Science Surf 23.06.2009, access 18.10.2025
Vitamins

1, 2, 3

A new review [Allergy (2009) vol. 64 (3) pp. 348-353] examines the evidence that

(1) failure to up-regulate the interferon gamma (IFNg) response during infancy is an important determinant of the risk of allergic disease
(2) expression of the IFNg gene in naive T-cells is regulated by epigenetic mechanisms, and
(3) failure to up-regulate IFNg gene expression of naive T-cells associated with low early life microbial exposure.

If we replace “microbial exposure” with Continue reading 1, 2, 3 →

 

CC-BY-NC Science Surf 14.06.2009, access 18.10.2025
Allergy, Vitamins

(1S,3Z)-3-[(2E)-2-[(1R,3aR,7aR)-7a-methyl-1-[(2R)-6-methylheptan-2-yl]-2,3,3a,5,6,7-hexahydro-1H-inden-4-ylidene]ethylidene]-4-methylidene-cyclohexan-1-ol

or briefly vitamin D3. There seems to be another vitamin D /allergy abstract at the forthcoming EAACI congress from the KOALA study. The authors find

Risk for AD was highest for children in the fourth quintile of maternal 25(OH)D level [adjusted odds ratio (aOR) 2.08; 95%CI 1.07-4.03] compared to those in the third quintile; P for trend over the quintiles 0.03]. Continue reading (1S,3Z)-3-[(2E)-2-[(1R,3aR,7aR)-7a-methyl-1-[(2R)-6-methylheptan-2-yl]-2,3,3a,5,6,7-hexahydro-1H-inden-4-ylidene]ethylidene]-4-methylidene-cyclohexan-1-ol →

 

CC-BY-NC Science Surf 20.05.2009, access 18.10.2025
Allergy, Vitamins

T_S_L_P

SPQR (is not necessary to be remembered) but certainly TSLP – at least if you are interested in allergy research (see the discussion here 2 years ago) when we knew from a PNAS paper that topical vitamin D3 induces thymic stromal lymphopoietin and triggers atopic dermatitis (in mice). Now there is an update – TSLP even mediates the progression to experimental asthma

vitamin D3 … not only triggers AD as we previously reported but also aggravates experimental allergic asthma induced by ovalbumin sensitization and challenge. Our study, which provides a mouse model to study human “atopic march

will be continued after Continue reading T_S_L_P →

 

CC-BY-NC Science Surf 14.05.2009, access 18.10.2025
Allergy, Philosophy, Vitamins

Shift happens

The current issue of the blue journal has more stuff on the vitamin D hypothesis (that has been shifted recently into the opposite direction). I agree with the editorial that

Intervention studies of vitamin D in the primary prevention and treatment of asthma raise a number of difficult scientific, ethical, and regulatory issues.

That may be true while the editorial includes the widely quoted myth that immunological effects occur only at high doses Continue reading Shift happens →

 

CC-BY-NC Science Surf 22.04.2009, access 18.10.2025