Gianni Angelini

Università degli Studi di Bari Aldo Moro, Bari, Apulia, Italy

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Publications (62)178.38 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Alkyl glucosides and alkyl poly-glucosides are widely used as wetting agents, surfactants and emulsifiers in several industrial and cosmetic products. They are known as well-tolerated and are usually added to the primary surfactants in order to reduce the irritating potential of the main foaming agents. Recently, some authors suggested that allergic contact dermatitis to alkyl glucosides might be more frequent than suspected. On the other hand, the chemical structures of glucosides do not show potentially allergenic chemical groups or strongly polarized structures. The aim of our study is to investigate alkyl glucosides carrying out a detailed chemical analysis on samples of raw materials to identify potentially allergenic impurities or by-products contained in commercial samples of alkyl glucosides. We chemically analyzed samples of cocoyl glucoside, decyl glucoside and lauryl glucoside by three different analytical methods, in order to identify any undesired or polluting substances. In each of the three samples, we detected the presence of isobornyl acrylate. Its approximate content in the tested samples is 500 ng/g of the product. Isobornyl acrylate is not used in the synthesis of alkyl glucosides, but as a plasticizer in many plastic materials. It can be easily released to materials flowing over these surfaces when they have high extraction power, as glucosides. Isobornyl acrylate may play a role as hidden allergen, in the form of an impurity collected during the industrial process, explaining some cases of allergic reaction to alkyl glucosides.
    Cutaneous and Ocular Toxicology 06/2015; DOI:10.3109/15569527.2015.1055495 · 0.92 Impact Factor
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    Indian journal of dermatology, venereology and leprology 04/2015; DOI:10.4103/0378-6323.155574 · 1.33 Impact Factor
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    ABSTRACT: Scalp hair heterochromia presenting in tufts with no underlying skin changes is rare and can be a sign of somatic mosaicism. We describe the case of a healthy 5-year-old boy with this condition.
    Pediatric Dermatology 09/2014; 31(6). DOI:10.1111/pde.12393 · 1.52 Impact Factor
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    ABSTRACT: The diagnosis of skin diseases relies on several clinical signs, among which color is of paramount importance. In this review, we consider certain clinical presentations of both eczematous and noneczematous contact dermatitis in which color plays a peculiar role orientating toward the right diagnosis. The conditions that will be discussed include specific clinical-morphologic subtypes of eczematous contact dermatitis, primary melanocytic, and nonmelanocytic contact hyperchromia, black dermographism, contact chemical leukoderma, and others. Based on the physical, chemical, and biologic factors underlying a healthy skin color, the various skin shades drawing a disease picture are thoroughly debated, stressing their etiopathogenic origins and histopathologic aspects.
    Dermatitis 07/2014; 25(4). DOI:10.1097/DER.0000000000000046 · 1.36 Impact Factor
  • Dermatitis 07/2014; 25(4). DOI:10.1097/DER.0000000000000053 · 1.36 Impact Factor
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    ABSTRACT: Irritant or allergic contact dermatitis usually presents as an eczematous process, clinically characterized by erythematoedematovesicous lesions with intense itching in the acute phase. Such manifestations become erythematous-scaly as the condition progresses to the subacute phase and papular-hyperkeratotic in the chronic phase. Not infrequently, however, contact dermatitis presents with noneczematous features. The reasons underlying this clinical polymorphism lie in the different noxae and contact modalities, as well as in the individual susceptibility and the various targeted cutaneous structures. The most represented forms of non-eczematous contact dermatitis include the erythema multiforme-like, the purpuric, the lichenoid, and the pigmented kinds. These clinical entities must obviously be discerned from the corresponding "pure" dermatitis, which are not associated with contact with exogenous agents.
    09/2013; 2013:361746. DOI:10.1155/2013/361746
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    ABSTRACT: Mycobacterium marinum is a non-tuberculous photochromogenic mycobacterium, commonly responsible for fish and amphibious infections world-wide. Contagion in humans typically follows minor hand trauma from aquarium keeping and manifests as a granulomatous infection of the skin. Dissemination is rare and almost exclusive to immunosuppressed hosts. 15 cases of M. marinum fish tank related infection are hereby reported. The site of infection was the upper limbs in all cases. 3 patients presented a single papulo-verrucous lesion, while the remaining 12 showed a sporotrichoid clinical pattern. Diagnosis was reached by history and clinical examination and further supported by one or more of the following criteria: histology, culture, acid fast bacilli identification from histologic specimen and PCR. 2 to 3 months minocycline treatment showed efficacy in 13 individuals, another case was treated with rifampicin-isoniazid association, yet another showed spontaneous regression over a 3 month period.
    09/2013; 23(4). DOI:10.1684/ejd.2013.2103
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    ABSTRACT: Pine caterpillar, Thaumetopoea pityocampa Schiff, is a phyto- and xylophagous lepidopteran, responsible for the delay in the growth or the death of various types of pines. Besides nature damage, pine caterpillar causes dermatological reactions in humans by contact with its irritating larvae hairs. Although the dermatitis occurs among outdoor professionals, it is primarily extraprofessional. Contamination generally occurs in pinewoods, rarely in cities. Means of contamination comprise direct contact with the nest or the processional caterpillar and indirect contact with air dispersed hairs. The dermatitis is generally observed in late spring and particularly from April to June, among campers and tourers. The eruption has its onset 1-12 hours after contact with the hairs and presents with intense and continuous itching. Morphologically, it is strophulus-like and consists of papulous, excoriated, and pinkish lesions on an oedematous base. Diagnosis is usually straightforward. The pathogenetic mechanism of the affection is mechanical, pharmacological, and allergic in nature. Besides skin, T. pityocampa Schiff can involve the eyes and rarely the airways. Despite the considerable damages to humans and nature, pine caterpillar infestation is an underestimated problem; medical literature lists few studies, and often relevant information is referred to local media and popular wisdom.
    The Scientific World Journal 05/2013; 2013:867431. DOI:10.1155/2013/867431 · 1.73 Impact Factor
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    ABSTRACT: Etiopathogenesis of nummular eczema is obscure; many causative factors have been proposed. Only a few studies investigated the relevance of contact allergy. This retrospective study aimed to investigate the role of contact allergy in the underlying mechanism of nummular eczema. From the 29,323 consecutive patients, we patch-tested for eczematous dermatitis of various type, 1022 (3.5%) with nummular eczema were enrolled. Data were collected for each patient, including age, sex, occupation, symptoms onset and duration, onset and spread sites, and clinical evidence or history of atopy. Histological analyses of acute phase lesions were carried out in some patients. Peak incidence of age at disease onset was found in the third decade of life. Predominant sites of lesions were upper (75.8%) and lower (64.5%) limbs, followed by trunk, dorsum of the hands, and face and neck. Three hundred thirty-two (32.5%) of 1022 patients showed positive reactions to 1 or more allergens. Highest sensitization rates were found with nickel sulfate (10.2%), potassium dichromate (7.3%), and cobalt chloride (6.1%). Histopathology showed less pronounced spongiosis in atopic subjects and the elderly. Because this study demonstrates that contact allergy is common with nummular eczema, patch testing is strongly advisable in every patient with persistent nummular dermatitis.
    Dermatitis 07/2012; 23(4):153-7. DOI:10.1097/DER.0b013e318260d5a0 · 1.36 Impact Factor
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    ABSTRACT: Nickel contact allergy remains common in Western countries, and the dermatitis may require prolonged treatment. The development of new strategies aimed at improving the quality of life of affected individuals is needed. To investigate the efficacy of oral hyposensitization in nickel-allergic individuals and how this affects in vitro T cell responsiveness to the metal. Twenty-eight nickel-allergic patients received a daily dose of 50 µg of elemental nickel (given as NiSO(4) ·6H(2) O) in cellulose capsules for 3 months. Severity of clinical manifestations, in vivo nickel responsiveness and in vitro T cell responses to the metal were assessed after 1 and 3 months. Twenty-six patients finished the study. In these patients, oral hyposensitization ameliorated clinical manifestations despite continued nickel exposures, and increased the threshold of skin responsiveness to nickel. The 12 enrolled patients in the immunological study showed decreased in vitro T lymphocyte responsiveness to the metal, in terms of both cell proliferation and cytokine release. In the 1-year follow-up, 50% of the patients experienced relapses of the clinical manifestations at sites of topical exposure to nickel. Our study suggested therapeutic efficacy of oral hyposensitization in allergic individuals. Placebo-controlled studies are required to confirm the results and determine the optimal therapeutic regimen for prolonged beneficial effects.
    Contact Dermatitis 06/2011; 65(5):293-301. DOI:10.1111/j.1600-0536.2011.01940.x · 3.62 Impact Factor
  • Dermatitis 04/2011; 22(2):119-20. · 1.36 Impact Factor
  • Contact Dermatitis 03/2011; 64(3):181-3. DOI:10.1111/j.1600-0536.2010.01817.x · 3.62 Impact Factor
  • Immunopharmacology and Immunotoxicology 09/2010; 32(3):528-9. DOI:10.3109/08923970903468839 · 1.11 Impact Factor
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    Contact Dermatitis 08/2010; 63(2):108-10. DOI:10.1111/j.1600-0536.2010.01755.x · 3.62 Impact Factor
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    ABSTRACT: Photocontact dermatitis to Ficus carica is induced by furocoumarins present in sap. These substances are generally considered to cause phototoxic reactions. We conducted a patch test and histopathological study of patients with phytophoto contact dermatitis from the fig tree to evaluate the mechanism underlying the photoreaction. Patch and photopatch testing with serial dilutions of two natural furocoumarins [5-methoxypsoralen and 8-methoxypsoralen (8-MOP)] contained in plant sap were performed in 47 patients. A synthetic furocoumarin, 4,5',8-trimethylpsoralen, was also tested. Histopathological analyses were made of some positive photoreactions. Positive photopatch tests reactions to 8-MOP were obtained in 12 of 47 patients, in 4 of them down to a concentration of 0.0001%. Patch tests and photopatch tests to the other two furocoumarins were negative. Histopathological findings on biopsies from positive photopatch tests to 8-MOP showed a dermatitis. Allergic photoreactions induced by contact with plants containing coumarins are generally regarded as chance findings. This study has demonstrated that phytophoto allergic contact dermatitis resulting from furocoumarins is not an exceptional finding, and should be suspected in subjects with diffuse clinical manifestations in photo-exposed but also non-exposed sites. To differentiate allergic from toxic photoreactions, patch tests need to be performed with serial dilutions of furocoumarins. Histological analysis of a biopsy sample from a positive test site will reveal alterations compatible with a photoallergic contact dermatitis.
    Contact Dermatitis 06/2010; 62(6):343-8. DOI:10.1111/j.1600-0536.2010.01713.x · 3.62 Impact Factor
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    ABSTRACT: Temporary henna-based tattoos, particularly popular among western tourists holidaying in exotic places, can expose to the risk to develop allergic reactions. Although hypersensitivity to henna is extremely rare, para-phenylenediamine, which is sometimes added to henna to obtain a dark, blackish color, is a frequent contact sensitizer. The purpose of this article is to review the literature about allergic reactions to temporary henna tattoos and outline the causes, clinical aspects and complications of this practice that should not be regarded as innocuous and risk-free.
    Immunopharmacology and Immunotoxicology 03/2010; 32(4):700-4. DOI:10.3109/08923971003685942 · 1.11 Impact Factor
  • Contact Dermatitis 11/2008; 59(4):252-3. DOI:10.1111/j.1600-0536.2008.01414.x · 3.62 Impact Factor
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    Contact Dermatitis 10/2008; 59(3):174-6. DOI:10.1111/j.1600-0536.2008.01369.x · 3.62 Impact Factor
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    ABSTRACT: Cyanamide is a chemical substance used in the treatment of chronic alcoholism as well in agriculture as a fertilizer. We report the case of a 28-year-old healthy non-atopic man that developed a severe skin eruption after the accidental penetration of a small amount of Dormex (a plant growth regulator containing cyanamide) through the patient's gloves. Patch tests revealed positive reactions to Dormex 1% pet. and cyanamide at a dilution of 0.1% pet. and 1% pet. We discuss the causes of sensitization in a patients that regularly used protective measures during anti-parasites treatments.
    Cutaneous and Ocular Toxicology 02/2008; 27(1):1-3. DOI:10.1080/15569520701598177 · 0.92 Impact Factor
  • Contact Dermatitis 11/2007; 57(4):281-2. DOI:10.1111/j.1600-0536.2007.01123.x · 3.62 Impact Factor

Publication Stats

588 Citations
178.38 Total Impact Points

Institutions

  • 1990–2014
    • Università degli Studi di Bari Aldo Moro
      • • Department of Chemistry
      • • Dipartimento di Scienze Biomediche ed Oncologia Umana (DIMO)
      Bari, Apulia, Italy
  • 1992–2010
    • Policlinico di Bari
      • Hospital Department of Internal Medicine N. Pende
      Bari, Apulia, Italy