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Alternative Therapies in Atopic Dermatitis Care: Part 2 from Natural Oils to Probiotics, Here’S What You Need to Know About Alternative Treatments

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Alternative Therapies in Atopic Dermatitis Care: Part 2 from Natural Oils to Probiotics, Here’S What You Need to Know About Alternative Treatments Alternative Therapies in Atopic Dermatitis Care: Part 2 From natural oils to probiotics, here’s what you need to know about alternative treatments. By Peter A. Lio, MD n last month’s article covering alternative ther- barrier function—in an incredibly affordable way.4 apies for the treatment of atopic dermatitis Evening primrose oil (Oenothera biennis) also (available online at PracticalDermatology.com), contains high levels of gamma linoleic acid, as well II examined Traditional Chinese Medicine as omega-6 fatty acids.6 It has had some promising (TCM), acupuncture, homeopathy, hypnosis and results with one randomized controlled trial of oral biofeedback. In this second and final entry on evening primrose oil showing improvement in 96 alternative therapies for atopic dermatitis, I will percent of the treatment group vs. only in 32 per- explore some other, less-organized therapies, cent of the placebo group.7 However, in aggregate, including natural oils, probiotics, and vitamins. the studies have been mixed, with an overall out- look that this is either not very helpful or only Natural Oils helpful in a select group. Dry skin and impaired barrier function are defin- Coconut oil (Cocos nucifera) has long been used ing characteristics of atopic dermatitis (AD). It is to treat atopic dermatitis in folk medicines. It thus not surprising that the application of oils con- appears to have some very promising properties tinues to be a popular alternative therapeutic when studied, as well: it is not only a good emol- approach. Indeed, the very act of moisturizing is a lient, but also has fairly impressive antibacterial mainstay of treatment, although in Western medi- qualities. One study found that topically applied cine, synthetic and petroleum-based products seem coconut oil decreased staphylococcal colonization to dominate the recommendations. There are some by 95 percent in patients with atopic dermatitis very interesting plant oils that hold promise and when applied twice daily for four weeks.8 With may work in more ways than one. our increasing understanding of the role of staphy- Sunflower seed oil (Helianthus annuus) has been studied and is notable for having both anti-inflam- Take-Home Tips. Some alternative approaches may hold some 1 matory and barrier restoring effects. Its major promise in the treatment of atopic dermatitis; conventional medicine lipid is linoleic acid, which is thought to activate still holds the most answers for AD. Sunflower seed oil is at the very peroxisome proliferative-activated receptor-alpha, least safe and may be able to help with AD via several mechanisms. 2 leading to decreased inflammation in the skin. At Coconut oil may be useful to decrease bacterial colonization. These are the same time, there is evidence that sunflower relatively inexpensive and easy to obtain. Despite some impressive seed oil enhances natural lipid production, perhaps findings for probiotics, other studies have not shown benefit or pre- because the linoleic acid is akin to ceramide pre- vention and many questions remain about dosing, timing, and the cursors.3 Finally, in a remarkable study of prema- appropriate type. It is reasonable to consider oral supplementation ture neonates, sunflower seed oil was shown to of vitamin D in patients with AD, however, topical vitamin D (and its significantly reduce deaths from infection—pre- analogues) seem to actually worsen AD. ● sumably by enhancing their poorly-developed skin 48 | Practical Dermatology | July 2011 Alternative Therapies in AD Botanicals At-A-Glance Probiotics The idea that “balancing” the immune response Sunflower seed oil (Helianthus annuus) could be performed by exposure to certain bacteria • Both anti-inflammatory and barrier restoring effects. is compelling. Indeed, an early study showing that • Major lipid is linoleic acid. neonates given Lactobacillus rhamnosus GG devel- • May enhance natural lipid production. oped AD only half as much as the control group created a stir in the AD community.9 A randomized Coconut oil (Cocos nucifera) controlled trial in 2005 demonstrated an equally • Long used to treat AD in folk medicines. impressive finding: twice daily administration of • A good emollient • Fairly impressive antibacterial qualities. probiotics to children with established moderate or severe AD resulted in significant improvement Evening primrose oil (Oenothera biennis) over placebo.10 • Contains high levels of gamma linoleic acid, as well as However, despite some impressive findings, omega-6 fatty acids. other studies have not shown benefit or preven- • Some promising results. tion, and many questions remain about optimal • In aggregate, studies have been mixed. dosing, timing, and the appropriate type of probi- otic.6 Although probiotics are probably safe, one trial did report an increased rate of episodes of bronchitis in treated patients, curbing enthusiasm and prompting caution until more is understood about probiotics in the setting of atopic diseases.11 Vitamins Vitamin D has been an increasingly hot topic for the past several years, with proposed benefits from lococcal colonization of the skin in AD, using such cancer prevention to immune regulation. an agent may not only help prevent infection, but Phototherapy with narrowband UVB light has long could also decrease the antigenic stimulation from been known to help AD and has been shown to the colonization and improve the disease. Further significantly increase levels of vitamin D in treated studies are necessary, but there could be a role for patients.12 Perhaps the vitamin D itself is responsi- coconut oil in some patients with AD. ble for some of the improvement. Taken together, these data suggest that sun- A small but impressive study from Sidbury et flower seed oil is at the very least safe, even for al. demonstrated significant improvement in 80 the youngest of patients, and has excellent plausi- percent of children given vitamin D supplementa- bility for being able to help with AD via several tion versus only in 17 percent of the controls.13 mechanisms. Coconut oil may be useful to Interestingly, this was demonstrated in a group of decrease bacterial colonization in a more natural patients whose eczema was reported to worsen way. Additionally, these are relatively inexpensive during the winter months, suggesting that perhaps and fairly easy to obtain. I have tried to integrate a relative deficiency of vitamin D was partly both of these into my practice and have had some responsible for their disease. Corroborating this success, though there is always the lingering con- was a more recent study that found a significant cern that with any food product, prolonged appli- inverse correlation between vitamin D level and cation to the skin could potentially sensitize an eczema severity.14 Given these data and the safety individual. This concern has been raised with topi- of vitamin D, it is reasonable to consider oral sup- cal oatmeal based products as well.5 plementation of vitamin D in patients with AD. July 2011 | Practical Dermatology | 49 Alternative Therapies in AD Alternative Therapies Proposed for AD There may yet be breakthroughs that come via these means, but for now their potential remains Systems Non-systems unrealized. ■ • TCM and Acupuncture • Probiotics • Homeopathy • Evening primrose oil Dr. Lio does not have any relevant relationship with indus- • Hypnosis and biofeedback • Coconut oil try. He is a member of the American Academy of Medical • Sunflower seed oil Acupuncture. • Oral vitamin D Peter A. Lio, MD is a Clinical Assistant Professor of • Vitamin B12 Dermatology at the Feinberg School of Medicine of Northwestern University. He is in private practice at Dermatology & Aesthetics of Wicker Park in Chicago, IL. It is interesting to note, however, that topical 1. Eichenfield LF, McCollum A, Msika P. The Benefits of Sunflower Oleodistillate (SOD) in vitamin D (and its analogues) while helpful for Pediatric Dermatology. Pediatr Dermatol. 2009 Nov;26(6):669-75. psoriasis, seem to actually worsen AD. A patch 2. Staumont-Sallé D, Abboud G, Brénuchon C, et al. Peroxisome proliferator-activated receptor test study found what appeared to be an irritant alpha regulates skin inflammation and humoral response in atopic dermatitis. J Allergy Clin Immunol. 2008 Apr;121(4):962-8.e6. 15 reaction that aggravated the skin of AD patients. 3. Msika P, De Belilovsky C, Piccardi N, et al. New emollient with topical corticosteroid-sparing Another report suggested that thymic stromal lym- effect in treatment of childhood atopic dermatitis: SCORAD and quality of life improvement. Pediatr Dermatol. 2008 Nov-Dec;25(6):606-12. phopoietin (TSLP) is induced by topical vitamin D 4. LeFevre A, Shillcutt SD, Saha SK, et al. Cost-effectiveness of skin-barrier-enhancing emol- analogues which in turn triggers Th2 inflammation lients among preterm infants in Bangladesh. Bull World Health Organ. 2010 Feb;88(2):104-12. and can flare AD.16 That said, a report from 2005 5. Boussault P, Léauté-Labrèze C, Saubusse E, et al. Oat sensitization in children with atopic dermatitis: prevalence, risks and associated factors. Allergy. 2007 Nov;62(11):1251-6. using one formulation demonstrated good improve- 6. Lee J, Bielory L. Complementary and alternative interventions in atopic dermatitis. Immunol ment in hand and foot eczema, suggesting that Allergy Clin North Am. 2010 Aug;30(3):411-24. 7. Senapati S, Banerjee S, Gangopadhyay DN. Evening primrose oil is effective in atopic der- some combination of formulation and eczema sub- matitis: a randomized placebo-controlled trial. Indian J Dermatol Venereol Leprol. 2008 Sep- type could allow for effective treatment.17 Oct;74(5):447-52. Vitamin B12 (cobalamin) has been identified as an 8. Verallo-Rowell VM, Dillague KM, Syah-Tjundawan BS. Novel antibacterial and emollient effects of coconut and virgin olive oils in adult atopic dermatitis. Dermatitis. 2008 Nov- inhibitor of inducible nitric oxide synthase, an Dec;19(6):308-15. important step in an inflammatory pathway that 9. Kalliomaki M, Salminen S, Arvilommi H, et al.
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