Thanks to the great audience in Washington DC watching our pro-con show about vitamin D and allergy. Are you still wondering about all the monkeys on my opponent’s slides? Me too…
With having fever from a flu on the way back to Europe, a picture came to my mind showing the 3 apes that are unable to see, hear and speak …
Mail me if there remain any doubts about the Th1 blocking effect of D3 or go to one of the recent reviews – I have take this for granted as it is even in standard textbooks like Roitt’s Immunology. Continue reading Three unwise monkeys
Tag Archives: vitamin-D
Asthma: a iatrogenic disease cont’d
I had already a thread here about asthma and iatrogenic factors last month including estrogens, vaccines, antibiotics, vitamin D, paracetamol, and Caesarean section. There may be even another kid on the block: folate. At least in mice in utero supplementation with methyl donors enhances allergic airway disease Continue reading Asthma: a iatrogenic disease cont’d
Asthma is a iatrogenic disease
The new Lancet has a paper from our own group as well as another one from ISAAC. We have already suggested earlier that asthma is a iatrogenic disease- the ISAAC paper now confirms at least the long suspected association with paracetamol use – gratulations to my London friend who had been working so long on this hypothesis. The accompanying editorial puts in into context:
Furthermore, although many important potential confounders were included in multivariate analyses, confounding by underlying respiratory disease, differences in hygiene, and use of other antipyretics might also explain the findings.
To put it more on a general level – more iatrogenic factors cannot be excluded, yea, yea.
Not all that wheezes is asthma
A new abstract at the recent ATS congress now clears the 2007 controversy between the Camargo and Gale studies on the effect of vitamin D: Wheezing is not asthma (as the atopy component is missing?). Continue reading Not all that wheezes is asthma
CD 14 now also on the vitamin+allergy list
Just for curiosity I am collecting a list of allergy genes that are vitamin D dependent. The list is already rather long but now there is a prominent addition: CD14. Known as asthma gene for many years the vitamin D dependency isn’t such clear. A clever analysis, however, now shows that there is an intermediate step involved Continue reading CD 14 now also on the vitamin+allergy list
Vitamin D as an adjuvans to specific immunotherapy
Despite the known allergy promoting effect of vitamin D in early childhood, there is mounting evidence that it may have beneficial effects during specific immunotherapy. A paper on “IL-10-inducing adjuvants enhance sublingual immunotherapy efficacy in a murine asthma model” by researchers from a French allergen company Continue reading Vitamin D as an adjuvans to specific immunotherapy
More retro vitamin D
During my recent trip to London, I could get a brief glimpse into the 1932 book “Vitamin D” by Reed, Struck and Steck. As this volume is not available in a German library and as it was not allowed by the British library to travel, I took now the lengthy procedures of registering, waiting in the queue, before searching this book for any allergy related items.
It seemed to be worthwile, although with some unexpected results: Continue reading More retro vitamin D
Vitamin, germs and allergy – 41 years ago
Do you still have some doubts on a recent experiment in mice that were sensitized under vitamin D co-exposure?
Here is another nice paper from Nature, Jan, 21, 1967 where rabbits are fed allergen & vitamin in a germ-free environment Continue reading Vitamin, germs and allergy – 41 years ago
Calcium gradient in skin, vitamin D and filaggrin
As filaggrin – one of our best atopy genes – is vitamin D dependent, I tried to find out more about epidermal differentiation. The plot here summarizes an earlier review:
There seems to be a clear calcium gradient with the expression of differentiation specific marker in the single strata. So there is some good chance that filaggrin effects may be modified by external vitamin D supply.
Vitamania
For everybody who wants to follow up the most recent discussion about allergy promoting effects of vitamin D here is a short summary. The Harvard group basically wrote three articles that were immediately contradicted. The comment on the first article in JACI was by a NIH researcher Continue reading Vitamania
Is there any environmental conditioning of vitamin D metabolism?
So far, I haven’t seen so much work about epigenetic regulation of vitamin D. There was already a paper in 2005 that showed how treatment with the
methylation inhibitor 5-aza-2′-deoxycytidine together with the deacetylation inhibitor trichostatin A resulted in elevation of both CYP27B1 and CYP24 mRNA expression demonstrating that even in normal human prostate cells expression of Vitamin D hydroxylases may be under epigenetic control
Continue reading Is there any environmental conditioning of vitamin D metabolism?
Severe flaw in mouse allergy studies
A report in Biospektrum 07.07/13:762 about the production of endotoxin free ovalbumin by a German company now reveals that nearly all commercially available ovalbumin preparations are highly contaminated with endotoxin. Company A included 723, company B 1038, company C 257 and company D 342 EU/mg LPS. As all mice are usually also on a vitamin D supplement diet, recent mouse studies may have produced largely artifacts if both – agonist and antagonist – are included in an uncontrolled manner, yea, yea.
A secosteroid transcriptional activator
A new vitamin D review is more serious about the biology and possible outcomes than some others.
The popular press is talking about vitamin D as “The Sunshine Vitamin”, promoting it as capable of reducing the risk of cancers and autoimmune disease. Yet vitamin D is actually a secosteroid transcriptional activator, at the heart of the innate immunity.
This looks trivial but it isn´t if you look at the NEJM paper Continue reading A secosteroid transcriptional activator
One small step for man
Slowly but surely, the hygiene hypothesis is going to be more and more perforated. A new NEJM paper finds Continue reading One small step for man
Enlightening
A new study reports a rather expected finding – young Finnish men in a military base ;-)
… conditions with respect to physical activity, nutrition, clohting, living quarters, and exposure to sunlight were homgenous
had twice as many respiratory infections if having serum vitamin D concentrations <40 nmol/L. The discussion, however, misses the point that there are many studies showing the same effect in children with rickets (references 82-86) eventually leading to pneumonia leading to death. “Enlighten the people generally, and tyranny and oppression of body and mind will vanish like evil spirits at the dawn of day” (Thomas Jefferson?)