Does Avoiding Allergens When Pregnant or Breast Feeding Confer Any Benefit

It has been considered over the last few years to advise mothers during pregnancy and whilst breast feeding to avoid allergenic foods such as milk, nuts, and other risky foods to reduce the risk of childhood allergy. Not for the first time researchers say this practice may be doing more harm than good. Research papers presented at a recent American Academy of Allergy, Asthma, and Immunology conference suggests that exposure may be better than avoidance.[1]

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Diet and Nerves: The Impact of Maternal Feeding on Newborn Intestinal Permeability

A possible link between what a mother eats during pregnancy and the risk of her child developing allergies has been identified in new research published in Septembers; The Journal of Physiology.[1]

This paper identified that if the maternal diet is rich in PUFA’s or poly unsaturated fats such as those found in flaxseed, walnuts and fish their offspring’s digestive tract develops differently than in those progeny lacking these PUFAs.

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Vitamin A: The Key to A Tolerant Immune System?

By Michael Ash, BSc(Hons). DO. ND. FellowDipION

Vitamin D and Vitamin A are essential co-partners in immunological and bone health.[1],[2] I’m particularly excited about vitamin A because of its profound effects on the gut mucosal immune system—a specialty of mine. Just as vitamin D has attracted attention for its ability to increase antimicrobial peptides and help us defeat pathogens, it’s fascinating to me that vitamin A is also essential for the very tissues that protect us from the same pathogens.

The availability of vitamin A in our food is a key factor in a tolerant, highly functional immune system. To quote from the title of a brilliant commentary in the March 2008 issue of Nature’s Mucosal Immunology, “Vitamin A rewrites the ABCs of oral tolerance.”[3]

Vitamin A is crucial to a very sophisticated bi-directional mechanism that takes place in the digestive system and leads to immune tolerance across the entire gut lining. Immune tolerance is the essence of good health. An intolerant immune system will lead to a wide range of illnesses, and the gut is where many people first lose immune tolerance. Vitamin A (retinoic acid) is key to our ability to consume a wide range of antigens (food) and yet not react adversely, and it’s quite fascinating.

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Does Junk Food increase the risk of Allergies and IBD?

As discussed here on many occasions it is well recognised that developed countries are suffering from an epidemic rise in immunologic disorders, such as allergy-related diseases and certain auto-immunities. One of the proposed explanations and one that I feel most convinced about is the changing composition of our intestinal microflora and parasite burden. Our intestinal ecological changes  appear to be altering our ability to manage appropriate immunomodulatory responses to various ingested and inhaled antigens.

The Proceedings of The National Academy of Science Journal published a paper this June 2010 exploring the differences in the microbial communities between those children on a western style diet and those from a rural African community whose diet reflected that of a the early humans – high in fibre.[1]

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Vegas, Pregnancy, Immunity and Allergy Prevention!

The saying is ‘what happens in Vegas stays in Vegas’, or if you are English ‘what happens in Blackpool….’ but the same cannot be said about what happens in utero, as increasing evidence supports the understanding that the maternal nutritional environment and early feeding affects the health of the foetus beyond infancy and into adulthood.[1],[2] An article in Nature’s Mucosal Immunology this month explores some of the key events in foetal and neonatal immune management.[3] It stimulated a revisit to the area of what to consider for parents to be and mums of young children when they ask ‘is there anything I can do to prevent or reduce the risk of allergy or atopy in my child’.

The first moments, weeks and months of life can determine the health outcomes of an individual over the duration of their lifetime and this knowledge represents a significant choice for prospective parents. Fortunately the remarkable adaptability of the immune and central nervous system means that there are numerous opportunities in the early years of life to positively influence health outcomes even if the early stages were less than optimal.

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Gluten May be Causing Your Brain Problems!

An interesting paper published in the Sept 2008 Annals of Neurology described a ‘new to science’ brain aggravating enzyme, triggered by reactivity to gluten, but acting independently of other coeliac symptoms.[1]

Most clinicians understand that overt gluten reactivity is classified under coeliac disease and the the classic constellation of symptoms and signs characterising  malabsorptive syndrome is a readily recognised manifestation  of  coeliac  disease. Frank malabsorptive symptoms include steatorrhea, weight loss or failure to thrive, bloating, and flatulence, with multiple deficiency states. More common but more difficult to recognise, however, are the other diverse ways in which coeliac disease presents.

Coeliac disease may also mimic many common clinical entities. These atypical modes of presentation include deficiencies of single micronutrients; nonspecific gastrointestinal complaints such as bloating, abdominal pain, diarrhoea, constipation, flatulence, secondary lactose intolerance, and dyspepsia; and non-gastrointestinal complaints such as fatigue, depression, arthralgia, milk intolerance, osteomalacia or osteoporosis, and iron deficiency anaemia.

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Naturopathic Approach to Childhood Allergies

The British Naturopathic Association

Presents:

Childhood Allergies, Diagnosis and Treatment

Study day : 21st March 2010

Time: 9.30am – 4.30pm

At: Large Lecture Theatre, University of Westminster, 115 Cavendish Street, London, W1W 6UW Directions

Cost: BNA members £50, non-members £60, BNA student members £30, non-BNA students £35

Refreshments and light lunch served. CPD certificates provided

To pay by credit/debit card or Paypal, and for more information, visit: The British Naturopathic Association web site

Speakers

Further details may be downloaded from BNA Childood Allergy Itinerary

Immune Tolerance in the GUT Relies on Dendritic Cells

cover_natureThe differing origins of gut dendritic cells — white blood cells that modulate immune responses — may explain how the intestinal immune system manages to destroy harmful pathogens while tolerating beneficial bacteria says an article by Sophie Laffont & Fiona Powrie in Nature journal out on Dec 10th 2009.

The immune system must protect the body from invading pathogens without mounting damaging responses to its own tissues. Dendritic cells, a rare population of white blood cells, have a crucial role in determining the nature of immune reactions and in fine-tuning the balance between tolerance (where the immune system ignores or tolerates an antigen) and the induction of inflammation to destroy pathogenic organisms.

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Microbes in Mum – Act as Inhibitors of Allergy in Children

coverA new twist to the hygiene hypothesis shows that allergic risk can also be modulated by microbial exposure before birth. Mice born to dams that were exposed to bacteria during pregnancy were less likely to develop allergic responses than those born to unexposed mothers. And maternal Toll-like receptor (TLR) signals were required for the transmission of protection.

TLRs are a type of pattern recognition receptor (PRR) and recognise molecules that are broadly shared by pathogens but distinguishable from host molecules, collectively referred to as pathogen-associated molecular patterns (PAMPs).

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DHA & Vit D in Pregnancy, A Key Role for Both

The Safe Foundation for a Healthy Pregnancy

APA logoThe omega-3 DHA is an “essential” fatty acid that the body cannot produce and must be consumed through diet or supplementation. The baby must acquire its DHA from its mother, and she must obtain it by increasing the omega-3s in her daily diet or from daily supplementation.[1] International recommendations suggest that pregnant and nursing women consume 300-600mg of DHA every day to ensure that mothers remain healthy during and after pregnancy, and that their babies have every opportunity for healthy development.[2]

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