José C. Duipmans

Main problems experienced by children with epidermolysis bullosa : A qualitative study with semi-structured interviews

The objective of this study was to identify and specify the problems of children with epidermolysis bullosa. The questions explored were: (i) What do children with epidermolysis bullosa experience as the most difficult problems; (ii) What is the impact of these problems on their daily life; and (iii) Do these experiences differ between mildly and severely affected children? Qualitative research methodology was used, comprising a series of semi-structured interviews with children with different (sub)types of epidermolysis bullosa. The interviews were analysed systematically with help of the qualitative software package Atlas-ti. Five main themes were found: (i) having an itchy skin, (ii) being in pain, (iii) having difficulties with participation, (iv) lack of understanding of others, and (v) the feeling of being different. Severely affected children suffered most from itch and treatment-related pain. Mildly affected children had more problems with activity-related pain. Mildly affected children also had more concerns about their appearance and the teasing and staring of others than did severely affected children. Both groups had difficulties with participation, the visibility of their disease and the feeling of being different.

High Anti-Staphylococcal Antibody Titers in Patients with Epidermolysis Bullosa Relate to Long-Term Colonization with Alternating Types of Staphylococcus aureus

Abbreviations: EB, epidermolysis bullosa; ET, exfoliative toxin; HlgB, gamma-hemolysin B; IsaA, immunodominant antigen A; Isd, iron-responsive surface determinant; Luk, leukocidin; LytM, peptidoglycan hydrolase; MFI, median fluorescence intensity; MLVA, multiple-locus variable number of tandem repeats analysis; Nuc, endonuclease; SAgs, superantigens; SasG, S. aureus surface protein G; SCIN, staphylococcal complement inhibitor; SE, staphylococcal enterotoxin

The Main Problems of Parents of a Child With Epidermolysis Bullosa

Epidermolysis Bullosa (EB) is a rare genetic blistering-skin disorder with varying degrees of severity, ranging from mild forms to severe forms, with chronic progression. The aim of this study was to identify and specify the problems of parents of a child with EB. Qualitative research methodology was used, comprising a series of semistructured interviews with eleven families. The key problems of parents were broken down into three themes, related to the child, the family, and the care providers. These themes comprised nine categories, including (1) the child being different, (2) the child suffering pain, (3) feelings of uncertainty, (4) restrictions on employment and leisure time, (5) difficulties in organization of care, (6) never being off-duty, (7) family problems, (8) ignorance and lack of skills of care providers, and (9) resistance to difficult care. Despite the great variance in clinical pictures of the different (sub)types of EB, the main problems parents experienced appear quite similar. However, the problems did appear to differ in extensiveness, intensity, and gravity.

High genetic diversity of Staphylococcus aureus strains colonizing patients with epidermolysis bullosa

Patients with the blistering disease, epidermolysis bullosa (EB), frequently suffer from chronic wounds that become colonized by pathogenic bacteria, such as Staphylococcus aureus. To determine S. aureus colonization rates in patients with EB, swabs were collected from the anterior nares, throats and wounds of 52 Dutch patients with EB. Swabs were also collected from nares and throats of 13 healthcare workers who occasionally meet the sampled patients with EB. All EB patients with chronic wounds and 75% of the patients without chronic wounds were colonized with S. aureus. In contrast, 39% of the sampled healthcare workers were colonized with S. aureus. Typing revealed a high degree of genetic diversity of 184 collected S. aureus isolates. Autoinoculation of S. aureus in individual patients with EB was shown to occur frequently, whereas transmission of S. aureus between patients with EB is apparently rare. There was no evidence for S. aureus transmission between patients with EB and healthcare workers.

Long‐term follow‐up of patients with Herlitz‐type junctional epidermolysis bullosa

Background  Junctional epidermolysis bullosa, type Herlitz (JEB‐H) is a rare, autosomal recessive disease caused by absence of the epidermal basement membrane adhesion protein laminin‐332. It is characterized by extensive and devastating blistering of the skin and mucous membranes, leading to death in early childhood.

Topography of distinct Staphylococcus aureus types in chronic wounds of patients with epidermolysis bullosa.

The opportunistic pathogen Staphylococcus aureus is known to interfere with wound healing and represents a significant risk factor for wound infections and invasive disease. It is generally assumed that one individual is predominantly colonized by one S. aureus type. Nevertheless, patients with the genetic blistering disease epidermolysis bullosa (EB) often carry multiple S. aureus types. We therefore investigated whether different S. aureus types are present in individual wounds of EB patients and, if so, how they are spatially distributed. The staphylococcal topography in chronic wounds was mapped by replica-plating of used bandages and subsequent typing of S. aureus isolates. Individual chronic wounds of five patients contained up to six different S. aureus types. Unexpectedly, distinct S. aureus types formed micro-colonies that were located in close proximity and sometimes even overlapped. While some adjacent S. aureus isolates were closely related, others belonged to distinct molecular complexes. We conclude that the general assumption that one individual is predominantly colonized by one type of S. aureus does not apply to chronic wounds of EB patients. We consider this observation important, not only for EB patients, but also for other patients with chronic wounds in view of the potential risk for severe staphylococcal infections.

Restrictions in oral functions caused by oral manifestations of epidermolysis bullosa

Several forms of epidermolysis bullosa (EB) present oral manifestations. Blistering of the (peri)oral mucosa affects the opening of the mouth, the mobility of the tongue and lips, thereby restricting oral functions. We describe the prevalence and characteristics of oral manifestations of EB in relation to loss of oral functions in a cross-sectional study of different types of EB patients using standardized measurement techniques. Twenty-two patients were included. The mobility of the mandible, lips and tongue was measured, the mandibular function impairment questionnaire (MFIQ) was filled out and additional questions regarding hindrance of EB during oral hygiene and intelligibility of speech (being understood) were asked in structured interviews. The median age was 11.8 yrs. Mobility of the mandible, tongue and lip was restricted, oral hygiene procedures were hindered in most patients. A data comparison was made between the recessive dystrophic EB (RDEB) and junctional EB (JEB) groups. Mandibular function was impaired in both groups but more severely in the RDEB-population. Intelligibility in both groups was almost unaffected. Restrictions in mobility of the mouth, tongue and lips are frequently present in EB patients. These are most severe in the RDEB group and support the clinical relevance of optimizing symptomatic treatment.

Interdisciplinary Management of Epidermolysis Bullosa in the Public Setting: The Netherlands as a Model of Care

An interdisciplinary team approach, in which the treatment can be individualized to each patient and his or her family and tailored to the severity of the disease, is most beneficial to the patient with epidermolysis bullosa (EB). In the Netherlands, the Center for Blistering Diseases in Groningen provides a large interdisciplinary EB team that performs at a high level to provide the best EB-patient care for both children and adults. The possibility of rapid diagnosis, the efficient carrousel-like clinics, and the continuity in care are typical elements of the Dutch method of delivering interdisciplinary EB care.

From the wound to the bench: exoproteome interplay between wound-colonizing Staphylococcus aureus strains and co-existing bacteria

ABSTRACT Wound-colonizing microorganisms can form complex and dynamic polymicrobial communities where pathogens and commensals may co-exist, cooperate or compete with each other. The present study was aimed at identifying possible interactions between different bacteria isolated from the same chronic wound of a patient with the genetic blistering disease epidermolysis bullosa (EB). Specifically, this involved two different isolates of the human pathogen Staphylococcus aureus, and isolates of Bacillus thuringiensis and Klebsiella oxytoca. Particular focus was attributed to interactions of S. aureus with the two other species, because of the high staphylococcal prevalence among chronic wounds. Intriguingly, upon co-cultivation, none of the wound isolates inhibited each others growth. Since the extracellular proteome of bacterial pathogens is a reservoir of virulence factors, the exoproteomes of the staphylococcal isolates in monoculture and co-culture with B. thuringiensis and K. oxytoca were characterized by Mass Spectrometry to explore the inherent relationships between these co-exisiting bacteria. This revealed a massive reduction in the number of staphylococcal exoproteins upon co-culturing with K. oxytoca or B. thuringiensis. Interestingly, this decrease was particularly evident for extracellular proteins with a predicted cytoplasmic localization, which were recently implicated in staphylococcal virulence and epidemiology. Furthermore, our exoproteome analysis uncovered potential cooperativity between the two different S. aureus isolates. Altogether, the observed exoproteome variations upon co-culturing are indicative of unprecedented adaptive mechanisms that set limits to the production of secreted staphylococcal virulence factors.

Human antibody responses against non-covalently cell wall-bound Staphylococcus aureus proteins

Human antibody responses to pathogens, like Staphylococcus aureus, are important indicators for in vivo expression and immunogenicity of particular bacterial components. Accordingly, comparing the antibody responses to S. aureus components may serve to predict their potential applicability as antigens for vaccination. The present study was aimed at assessing immunoglobulin G (IgG) responses elicited by non-covalently cell surface-bound proteins of S. aureus, which thus far received relatively little attention. To this end, we applied plasma samples from patients with the genetic blistering disease epidermolysis bullosa (EB) and healthy S. aureus carriers. Of note, wounds of EB patients are highly colonized with S. aureus and accordingly these patients are more seriously exposed to staphylococcal antigens than healthy individuals. Ten non-covalently cell surface-bound proteins of S. aureus, namely Atl, Eap, Efb, EMP, IsaA, LukG, LukH, SA0710, Sle1 and SsaA2, were selected by bioinformatics and biochemical approaches. These antigens were recombinantly expressed, purified and tested for specific IgG responses using human plasma. We show that high exposure of EB patients to S. aureus is mirrored by elevated IgG levels against all tested non-covalently cell wall-bound staphylococcal antigens. This implies that these S. aureus cell surface proteins are prime targets for the human immune system.