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Objective: To evaluate the association between patterns of gestational weight gain (GWG) and allergic diseases in offspring., Design: Prospective cohort study., Setting: Prenatal clinics in Wuhan, China., Population: A cohort of 2546 mother and offspring pairs were enrolled before 16 weeks of gestation and followed up to 24 months postpartum., Methods: Maternal body weights were measured regularly during pregnancy, and their GWG patterns were estimated using the growth mixture model. Robust Poisson models were used to evaluate relative risk (RR) and 95% CI after multivariable adjustment., Main Outcome Measures: Offspring atopic allergy and allergic contact dermatitis were defined according to a physician's diagnosis reported by the mother, and food allergy was reported by the mother., Results: Three GWG patterns were identified: 18.1% (461) of the women were described as pattern 1, characterised by rapid GWG earlier in pregnancy; 56.6% (1442) of the women were described as pattern 2, with steady GWG throughout pregnancy; and 25.3% (643) of the women was described as pattern 3, with rapid GWG later in pregnancy. By the age of 24 months, 360 (14.1%), 109 (4.3%) and 757 (29.7%) offspring had atopic allergy, allergic contact dermatitis or food allergy, respectively. Compared with women in GWG pattern 2, the RRs (95% CIs) among women in pattern 1 were 0.74 (0.55-0.99) for atopic allergy, 0.64 (0.36-1.15) for allergic contact dermatitis and 0.95 (0.81-1.12) for food allergy., Conclusions: Maternal GWG pattern characterised by rapid GWG earlier in pregnancy was associated with a lower risk of atopic allergy in offspring., (© 2023 John Wiley & Sons Ltd.)

The nipple is the focal point of the human breast and serves important physiological, sexual, and aesthetic purposes. It can be affected by atopic, irritant, and allergic contact eczema, which often reduce the patient's quality of life. The objective of this article is to discuss the different types of nipple eczema and highlight relevant differential diagnoses and treatment options. A systematic search of PubMed was conducted to identify and critically appraise the existing literature on the topic. All articles on nipple eczema were considered eligible, regardless of publication date, language or study design. A final of 33 manuscripts on nipple eczema remained. The scarce literature and the limited number of high-quality manuscripts impedes provision of structured data on nipple eczema. To securely reach the educative value of this manuscript, the systematic review was combined with a manual databank search and selected manual search of textbooks. The differential diagnosis of nipple eczema encompasses among others nipple psoriasis, nipple candidiasis and Paget's disease. In case of diagnostic uncertainty, swabs or biopsies are indicated. Treatment of nipple eczema needs to rapidly control the signs and symptoms of the disease, since it can have a negative effect on quality of life and can lead to premature arrest of breastfeeding. The key treatment step is starting with topical corticosteroids or calcineurin inhibitors, both of which are considered safe during lactation. Avoidance of provoking factors, such as repetitive friction, chemical agents, or allergens, can help. The use of nipple protection devices can be proposed for nursing women and sometimes adjusting of latch/suck positioning during breastfeeding is needed. Furthermore, patients should be advised to moisturize the nipple intensively and to switch to emollient wash products. Warm water compresses, black tea compresses or commercially available tannin containing topicals can provide comfort., (© 2023 European Academy of Dermatology and Venereology.)

Background: Allergic contact dermatitis can negatively impact an individual's daily life in terms of work and interpersonal relationships. Patch-tested individuals show an improved quality of life (QoL)., Objectives: We aimed to assess the impact on QoL after patch testing and what value an intervention would have on QoL., Methods: Dermatology Quality of Life Index (DLQI) were assessed in participants with positive patch test reaction. The participants were randomized, in parallel design, into two groups that received either standard information (controls, n = 70) or a reminder letter in addition to standard information (intervention group, n = 66), ClinicalTrials.gov NCT01953380., Results: The response rate was 74% (n = 136). The DLQI score was significantly lower 1 year after patch testing in comparison with baseline in the entire group (mean DLQI 6.3 and 4.5 respectively, 95% CI 0.93-2.72, P < 0.001). However, linear regression analyses showed no significant differences in DLQI score at follow-up between the intervention and control groups. Neither age nor gender had impact on DLQI score., Conclusion: There was an improvement of QoL at follow-up in the entire group. However, the intervention performed did not show any significantly greater improvement concerning QoL. Further research is needed to understand what factors apart from patch testing and medical care may affect QoL in patients with contact dermatitis, and what interventions are needed to improve QoL., (© 2022 The Authors. Journal of the European Academy of Dermatology and Venereology published by John Wiley & Sons Ltd on behalf of European Academy of Dermatology and Venereology.)

Background: The circadian rhythm controls multiple biological processes, including immune responses; however, its impact on cutaneous adaptive immune response remains unclear., Methods: We used a well-established cutaneous type IV allergy model, contact hypersensitivity (CHS). We induced CHS using dinitrofluorobenzene (DNFB). Mice were sensitized and elicited with DNFB in the daytime or at night., Results: In mice, a nocturnally active animal, we found that ear swelling increased when mice were sensitized at night compared with in the daytime. In addition, cell proliferation and cytokine production in the draining lymph nodes (LNs) were promoted when sensitized at night. We hypothesized that these differences were due to the oscillation of leukocyte distribution in the body through the circadian production of adrenergic hormones. Administration of a β2-adrenergic receptor (β2AR) agonist salbutamol in the daytime decreased the number of immune cells in blood and increased the number of immune cells in LNs. In contrast, a β2AR antagonist ICI18551 administration at night increased the number of immune cells in blood and decreased the number of immune cells in LNs. Accordingly, the severity of CHS response was exacerbated by salbutamol administration in the daytime and attenuated by ICI18551 administration at night., Conclusion: Our study demonstrated that the magnitude of adaptive CHS response depends on the circadian rhythm and this knowledge may improve the management of allergic contact dermatitis (ACD) in humans., (© 2022 European Academy of Allergy and Clinical Immunology and John Wiley & Sons Ltd.)

Background: In recent years, skin reactions secondary to the use of medical devices (MD), such as allergic contact dermatitis have increasingly been observed (e.g. to continuous blood sugar monitoring systems, insulin pumps, wound dressings, medical gloves, etc.): this is regarded as a developing epidemic. Lack of labelling of the composition of MD, as well as frequent lack of cooperation of manufacturers to disclose this relevant information, even when contacted by the clinician for the individual case of an established adverse reaction, significantly impede patient care., Objectives: To advocate for full ingredient labelling in the implementation of EU regulation for MD., Methods: This position paper reviews the scientific literature, the current regulatory framework adopted for MD to date, and the likely impact, including some costs data in case of the absence of such labelling., Results: Efforts made by several scientific teams, who are trying to identify the culprit of such adverse effects, either via asking for cooperation from companies, or using costly chemical analyses of MD, can only partly, and with considerable delay, compensate for the absence of meaningful information on the composition of MD; hence, patient management is compromised. Indeed, without knowing the chemical substances present, physicians are unable to inform patients about which substances they should avoid, and which alternative MD may be suitable/tolerated., Conclusion: There is an urgent need for full and accurate labelling of the chemical composition of MD in contact with the human body., (© 2021 The Authors. Journal of the European Academy of Dermatology and Venereology published by John Wiley & Sons Ltd on behalf of European Academy of Dermatology and Venereology.)