Update on the genus<i>Malassezia</i>

Ashbee, H. R.

doi:10.1080/13693780701191373

Cited by 175 publications

(156 citation statements)

References 156 publications

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“…(Xu et al, 2007). Moreover, worldwide epidemiological studies sampling healthy volunteers and Malassezia associated dermatoses, such as pityriasis versicolor, atopic dermatitis and seborrheic dermatitis, report isolation of mixed species from healthy and diseased skin, as well as clear geographic variations in Malassezia species isolation rates (Ashbee, 2007).…”

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“…The genus Malassezia includes 10 anthropophilic and obligatory lipophilic species (M. globosa, M. restricta, M. slooffiae, M. obtusa, M. furfur, M. sympodialis, M. japonica, M. yamatoensis, M. dermatis, M. nana) and 3 zoophilic species (M. pachydermatis, M. caprae, M. equina) (Cabañ es et al, 2007;Ashbee, 2007). It is considered a member of the class Exobasidiomycetes that mainly includes plant pathogens (Begerow et al, 2006).…”

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Malassezia furfur fingerprints as possible markers for human phylogeography

et al. 2008

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Malassezia furfur was the first species described within the cosmopolitan yeast genus Malassezia, which now comprises 13 species. Reported isolation rates of these species from healthy and diseased human skin show geographic variations. PCR-fingerprinting with the wild-type phage M13 primer (5 0 -GAGGGTGGCGGTTCT-3 0 ) was applied to investigate phylogeographic associations of M. furfur strains isolated from Scandinavians residing permanently in Greece, in comparison to clinical isolates from Greek, Bulgarian and Chinese native residents. Seven M. furfur strains from Scandinavians were compared with the Neotype strain (CBS1878), CBS global collection strains (n ¼ 10) and clinical isolates from Greece (n ¼ 4), Bulgaria (n ¼ 15) and China (n ¼ 6). Scandinavian, Greek and Bulgarian M. furfur strains mostly formed distinct group clusters, providing initial evidence for an association with the host's geographical origin and with the underlying skin condition. These initial data address the hypothesis that M. furfur could be a eukaryotic candidate eligible for phylogeographic studies.

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Malassezia furfur fingerprints as possible markers for human phylogeography

et al. 2008

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“…To survive in a normal environment, M. furfur has its own protective mechanism against host defenses 10 . The melanin-like pigment allows the yeast to be less susceptible to the reactive oxygen species generated during the immunological response, and the lipases, phospholipases and hydrolases of yeasts are essential for providing the lipids that are required for growth [11][12][13][14] .…”

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The Effect of Detergents on the Morphology and Immunomodulatory Activity ofMalassezia furfur

Kim

et al. 2009

Ann Dermatol

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Background: Several workers have found that Malassezia are capable of suppressing cytokine release and downregulating the phagocytic function of monocytes. But lipid-depleted Malassezia furfur (M. furfur) extracts have also been shown to induce increased production of TNF-α, IL-6 and IL-1β in monocytes. We thought that the detergents in shampoos or soaps could change the composition of the lipid in the M. furfur cell wall. Objective: We studied whether detergents affect the morphology of M. furfur and if the inflammatory cytokine profiles change in the monocytes treated with detergent-treated M. furfur. Methods: Commonly used detergents such as sodium lauryl sulfate, ammonium lauryl sulfate and tween-80 were respectively added to the modified Leeming-Notman's media. M. furfur was cultivated in each media (detergent-added or untreated). Thereafter, the surface morphology of the yeast was evaluated by scanning and transmission electron microscopy. The cytokine profiles of monocytes, which were treated by M. furfur with or without detergents, were also evaluated. Results: The detergent-treated M. furfur were similar to the lipid-extracted form of M. furfur on the electron microscopic study, with a recessed, withered surface and with thinner and rather electron transparent cell walls than the detergent-untreated M. furfur. The levels of TNF-α were higher in monocytes treated with detergent-treated Malassezia than that in the monocytes treated with the detergent-untreated Malassezia (p＜0.05). Conclusion: According to the findings in this study, it could be inferred that the detergents in shampoos or soaps affect the lipid layers of the Malassezia cell wall and these lipid-extracted Malassezia induce or aggravate some inflammatory conditions. But to correlate the relationship between detergents and Malassezia-associated diseases, in vivo experiments that will focus on short-term contact with detergents in real life conditions should be done. (Ann Dermatol 21(2) 130∼135, 2009)

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“…Malassezia species are also known as opportunistic pathogens, being found associated with diverse dermatological pathologies including pityriasis versicolor, seborrheic dermatitis, atopic dermatitis, and folliculitis (1)(2)(3). Among these species, Malassezia restricta was revealed to be the most abundant Malassezia species on the scalp, neck, face, and ears of healthy volunteers (4,5).…”

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Chemical Organization of the Cell Wall Polysaccharide Core of Malassezia restricta

Stalhberger

Simenel

Clavaud

et al. 2014

Journal of Biological Chemistry

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Background: Cell wall of Malassezia restricta is involved in interactions with human skin. Results: Its core is composed of cross-linked polysaccharides such as chitin, chitosan, ␤-(1,3)-glucan and ␤-(1,6)-glucan. Conclusion: The composition of cell wall polysaccharides of M. restricta is unique in the fungal kingdom. Significance: The cell wall of M. restricta has evolved as a yeast that adapted to the skin microenvironment and host interactions.

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Update on the genusMalassezia

Cited by 175 publications

References 156 publications

Malassezia furfur fingerprints as possible markers for human phylogeography

Malassezia furfur fingerprints as possible markers for human phylogeography

The Effect of Detergents on the Morphology and Immunomodulatory Activity ofMalassezia furfur

Chemical Organization of the Cell Wall Polysaccharide Core of Malassezia restricta

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