shRNA-Targeting Caspase-3 Inhibits Cell Detachment Induced by Pemphigus Vulgaris Autoantibodies in HaCaT Cells.

Pemphigus is an autoimmune disease that affects the skin and mucous membranes, induced by the deposition of pemphigus IgG, which mainly targets desmogleins 1 and 3 (Dsg1 and 3). This autoantibody causes steric interference between Dsg1 and 3 and the loss of cell adhesion, producing acantholysis. This molecule and its cellular effects are clinically reflected as intraepidermal blistering. Pemphigus vulgaris-IgG (PV-IgG) binding involves p38MAPK-signaling-dependent caspase-3 activation. The present work assessed the in vitro effect of PV-IgG on the adherence of HaCaT cells dependent on caspase-3. PV-IgG induced cell detachment and apoptotic changes, as demonstrated by annexin fluorescent assays. The effect of caspase-3 induced by PV-IgG was suppressed in cells pre-treated with caspase-3-shRNA, and normal IgG (N-IgG) as a control had no relevant effects on the aforementioned parameters. The results demonstrated that shRNA reduces caspase-3 expression, as measured via qRT-PCR and via Western blot and immunofluorescence, and increases cell adhesion. In conclusion, shRNA prevented in vitro cell detachment and the late effects of apoptosis induced by PV-IgG on HaCaT cells, furthering our understanding of the molecular role of caspase-3 cell adhesion dependence in pemphigus disease.

Pénfigo foliáceo, variedad seborreica, reporte de caso / Pemphigus foliaceus, seborrheic variety, case report

Presentación del caso. Se expone el caso de un paciente masculino de 48 años de edad, sin antecedentes médicos conocidos, que presentó múltiples lesiones en forma de placas eritematocostrosas fácilmente descamativas, inicialmente en tórax anterior, que se esparcían sobre el rostro y cuero cabelludo sin afectar las mucosas. Intervención terapéutica. El manejo hospitalario se basó fundamentalmente en el uso de esteroides tópicos y sistémicos, así como el manejo de las infecciones sobreagregadas a las lesiones dermatológicas y el apoyo psicológico del paciente. Se tomó biopsia de piel donde se evidenció la presencia de acantólisis, confirmando el diagnóstico de esta enfermedad autoinmunitaria. Evolución clínica. Luego del tratamiento se logró una reducción de las múltiples lesiones descamativas, el control de la infección local y la recuperación de la piel del paciente, la cual a pesar de aún presentar cicatrices se encontraba con sus funciones restituidas

Case presentation. a 48-year-old male with no known medical history who presented multiple lesions in the form of easily desquamative erythematous and crusted plaques, initially on the anterior thorax, which spread over the face and scalp without affecting the mucous membranes. Treatment. In-hospital management was mainly based on topical and systemic steroids, the management of infections superadded to the dermatologic lesions, and psychological support for the patient. A skin biopsy was taken where acantholysis was evidenced, confirming the autoimmune disease diagnosis. Outcome.After treatment, the multiple scaly lesions were reduced, the local infection was controlled, and the patient's skin recovered although it still had scars, its functions were restored

Autoantibodies against desmoglein 2 are not pathogenic in pemphigus

Abstract Background Anti-desmoglein 1 and 3 autoantibodies justify acantholysis in pemphigus; however, the pathogenesis of anti-desmoglein 2 is hypothetical. Objective To compare the participation of desmogleins 1, 2 and 3 through the production of serum autoantibodies, and protein and gene expression in the skin/mucosa of patients with pemphigus foliaceus and pemphigus vulgaris. Methods The autoantibodies were titrated by ELISA in 202 samples of pemphigus foliaceus, 131 pemphigus vulgaris, 50 and 57 relatives of patients with pemphigus foliaceus and pemphigus vulgaris, respectively, and 114 controls. Protein and gene expressions were determined by immunohistochemistry and qPCR in the skin/mucosa of 3 patients with pemphigus foliaceus and 3 patients with pemphigus vulgaris. Results Higher titers of anti-desmoglein 2 (optical density) resulted in pemphigus foliaceus and pemphigus vulgaris, when compared to controls (0.166; 0.180; 0.102; respectively; p < 0.0001). There was a correlation between anti-desmoglein 2 and anti-desmoglein 1 titers in pemphigus foliaceus (r = 0.1680; p = 0.0206). There was no cross-reaction of anti-desmoglein 2 with desmoglein 1 and 3. Protein overexpression of desmoglein 2 was observed in intact and lesional skin of patients with pemphigus compared to the skin of controls. Internalization granules of desmoglein 1 and 3, but not of desmoglein 2, were observed in lesions of pemphigus foliaceus and pemphigus vulgaris, respectively. Gene overexpression of desmoglein 2 was observed in the mucosa. Study limitations Small sample size for the statistical analysis of protein and gene expression. Conclusion Autoantibodies against desmoglein 2 are not pathogenic in pemphigus; protein and gene overexpression of desmoglein 2 in the skin and mucosa may be involved in acantholysis repair.

Autoantibodies against desmoglein 2 are not pathogenic in pemphigus.

BACKGROUND: Anti-desmoglein 1 and 3 autoantibodies justify acantholysis in pemphigus; however, the pathogenesis of anti-desmoglein 2 is hypothetical. OBJECTIVE: To compare the participation of desmogleins 1, 2 and 3 through the production of serum autoantibodies, and protein and gene expression in the skin/mucosa of patients with pemphigus foliaceus and pemphigus vulgaris. METHODS: The autoantibodies were titrated by ELISA in 202 samples of pemphigus foliaceus, 131 pemphigus vulgaris, 50 and 57 relatives of patients with pemphigus foliaceus and pemphigus vulgaris, respectively, and 114 controls. Protein and gene expressions were determined by immunohistochemistry and qPCR in the skin/mucosa of 3 patients with pemphigus foliaceus and 3 patients with pemphigus vulgaris. RESULTS: Higher titers of anti-desmoglein 2 (optical density) resulted in pemphigus foliaceus and pemphigus vulgaris, when compared to controls (0.166; 0.180; 0.102; respectively; p < 0.0001). There was a correlation between anti-desmoglein 2 and anti-desmoglein 1 titers in pemphigus foliaceus (r = 0.1680; p = 0.0206). There was no cross-reaction of anti-desmoglein 2 with desmoglein 1 and 3. Protein overexpression of desmoglein 2 was observed in intact and lesional skin of patients with pemphigus compared to the skin of controls. Internalization granules of desmoglein 1 and 3, but not of desmoglein 2, were observed in lesions of pemphigus foliaceus and pemphigus vulgaris, respectively. Gene overexpression of desmoglein 2 was observed in the mucosa. STUDY LIMITATIONS: Small sample size for the statistical analysis of protein and gene expression. CONCLUSION: Autoantibodies against desmoglein 2 are not pathogenic in pemphigus; protein and gene overexpression of desmoglein 2 in the skin and mucosa may be involved in acantholysis repair.

Pénfigo benigno familiar de presentación atípica en paciente sin antecedente familiar / Atypical presentation of familial benign pemphigus in patient without familiar background

Resumen La enfermedad de Hailey-Hailey, también llamada pénfigo familiar benigno, corresponde a una genodermatosis debilitante que se transmite mediante un patrón autosómico dominante, con una prevalencia de alrededor de 1 en 50.000 casos. El reporte de antecedentes familiares está presente hasta en 60 % de los pacientes. Se caracteriza por la presencia de vesículas crónicas y recurrentes, erosiones y exulceraciones en zonas de flexura. El tratamiento puede representar un reto, porque a pesar del manejo con terapias tópicas, corticosteroides sistémicos, inmunomoduladores sistémicos y el empleo de láser, ninguna terapia ha logrado una remisión a largo plazo. Se presenta el caso de un paciente masculino, adulto medio, sin antecedente familiar alguno, con historia de placas de superficie descamativa y hematocostras recurrentes crónicas y presentación clínica atípica, dada la localización de lesiones predominantes en miembros superiores, con sospecha inicial de psoriasis vulgar, con posterior toma de biopsia y reporte de patología que evidencia histológia típica de PBF. Por lo cual se indica manejo con corticosteroides sistémicos, sin evidencia de reacciones adversas y con remisión a largo plazo. MÉD.UIS.2020;34(1):101-6

Abstract Hailey-Hailey disease, also called benign familial pemphigus, corresponds to a debilitating genodermatosis that is transmitted through an autosomal dominant pattern, with a prevalence of around 1 in 50,000 cases. The family history report is present in up to 60% of patients. It is characterized by the presence of chronic and recurrent vesicles, erosions and exulcerations in flexural areas. Treatment can be challenging, because despite management with topical therapies, systemic corticosteroids, systemic immunomodulators, and the use of lasers, no therapy has achieved long-term remission.We present the case of a male patient, middle adult, without any family history, with a history of scaly surface plaques and chronic recurrent hematocostras and atypical clinical presentation given the location of predominant lesions in the upper limbs, with initial suspicion of vulgar psoriasis, with subsequent biopsy and pathology report showing typical PBF histology. Therefore, management with systemic corticosteroids without evidence of adverse reactions and with long-term remission is indicated. MÉD.UIS.2020;34(1):101-6

Case for diagnosis. Atypical Grover's disease

Abstract A 55-year-old male presented with an eight-month history of erythematous papules and plaques with demarcated areas of spared skin on his trunk, upper extremities, neck, and face. Grover's disease is a rare, acquired disorder of unknown origin, which is classically characterized by the appearance of erythematous papules on the upper trunk that are usually transient. As in the present case, there are reports of atypical disease, with facial involvement, pityriasis rubra pilaris-like lesions, and a more chronic course.

Case for diagnosis. Atypical Grover's disease.

A 55-year-old male presented with an eight-month history of erythematous papules and plaques with demarcated areas of spared skin on his trunk, upper extremities, neck, and face. Grover's disease is a rare, acquired disorder of unknown origin, which is classically characterized by the appearance of erythematous papules on the upper trunk that are usually transient. As in the present case, there are reports of atypical disease, with facial involvement, pityriasis rubra pilaris-like lesions, and a more chronic course.

Enfermedad de Darier white: Reporte de caso y relación con enfermedades neuropsiquiátricas / Darier white disease: Case report and relationship with neuropsychiatric diseases

La enfermedad de Darier White es una enfermedad autosómica dominante, de penetrancia completa con expresividad variable que afecta al cromosoma 12q23-24.1. Se caracteriza por manifestaciones dermatológicas como: placas o pápulas no foliculares en zonas seborreicas, que tienen un olor característico. La presente investigación busca presentar reportes de casos de dos pacientes, en un Hospital Universitario en Bogotá-Colombia y la relación que existe con enfermedades psiquiátricas, tales como: trastorno afectivo bipolar y retraso mental. Se realizó una historia clínica y examen físico completo. Posteriormente, se firmó un consentimiento informado para toma de fotos y uso de las mismas, con fines educativos. Con estos elementos, se buscó información en las bases de datos más requeridas hoy en día, como: Pubmed, Science Direct, Embase y Scielo utilizando búsquedas con palabras claves, relacionando enfermedad de Darier White y enfermedades psiquiátricas en general. Consecutivamente, se buscó información de trastorno afectivo bipolar y retraso mental. En definitiva se enfocó cada uno de los casos descritos, como enfermedad de Darier con la asociación clínica de enfermedades psiquiátricas, en relación con el trastorno afectivo bipolar y retraso mental, con los que esta enfermedad muestra una relación estrecha.

Darier White or dyskeratosis follicularis disease is a genetic disorder of autosomal dominant trait, affecting chromosome 12q23-24.1. It starts at first or second decade of life, it is characterized by cutaneous manifestations due to several hyperkeratotic papules that affect seborrheic areas such as head, neck and thorax. This article seeks to present reports of cases of two patients in a Hospital in Bogotá-Colombia and their relationship with psychiatric illnesses such as bipolar affective disorder and mental retardation. A complete clinical history was made, the patients were examined, and informed consent was signed for taking pictures and using them for educational purposes. With this information, we proceeded to look for bibliography in the most recognized databases such as: Pubmed, Science Direct, Embase using advanced searches with key words, related words like Darier White disease and its relationship with psychiatric illnesses in general. Finally, each of the cases described as Darier's disease was approached with the clinical association of psychiatric illnesses such as bipolar affective disorder and mental retardation, with which this disease shows a close relationship in relation to the percentages of presentation.

Sparking Fire Under the Skin? Answers From the Association of Complement Genes With Pemphigus Foliaceus.

Skin blisters of pemphigus foliaceus (PF) present concomitant deposition of autoantibodies and components of the complement system (CS), whose gene polymorphisms are associated with susceptibility to different autoimmune diseases. To investigate these in PF, we evaluated 992 single-nucleotide polymorphisms (SNPs) of 44 CS genes, genotyped through microarray hybridization in 229 PF patients and 194 controls. After excluding SNPs with minor allele frequency <1%, out of Hardy-Weinberg equilibrium in controls or in strong linkage disequilibrium (r2 ≥ 0.8), 201 SNPs remained for logistic regression. Polymorphisms of 11 genes were associated with PF. MASP1 encodes a crucial serine protease of the lectin pathway (rs13094773: OR = 0.5, p = 0.0316; rs850309: OR = 0.23, p = 0.03; rs3864098: OR = 1.53, p = 0.0383; rs698104: OR = 1.52, p = 0.0424; rs72549154: OR = 0.55, p = 0.0453). C9 (rs187875: OR = 1.46, p = 0.0189; rs700218: OR = 0.12, p = 0.0471) and C8A (rs11206934: OR = 4.02, p = 0.0323) encode proteins of the membrane attack complex (MAC) and C5AR1 (rs10404456: OR = 1.43, p = 0.0155), a potent anaphylatoxin-receptor. Two encode complement regulators: MAC-blocking CD59 (rs1047581: OR = 0.62, p = 0.0152) and alternative pathway-blocking CFH (rs34388368: OR = 2.57, p = 0.0195). One encodes opsonin: C3 (rs4807895: OR = 2.52, p = 0.0239), whereas four encode receptors for C3 fragments: CR1 (haplotype with rs6656401: OR = 1.37, p = 0.0382), CR2 (rs2182911: OR = 0.23, p = 0.0263), ITGAM (CR3, rs12928810: OR = 0.66, p = 0.0435), and ITGAX (CR4, rs11574637: OR = 0.63, p = 0.0056). Associations reinforced former findings, regarding differential gene expression, serum levels, C3, and MAC deposition on lesions. Deregulation of previously barely noticed processes, e.g., the lectin and alternative pathways and opsonization-mediated phagocytosis, also modulate PF susceptibility. The results open new crucial avenues for understanding disease etiology and may improve PF treatment through additional therapeutic targets.

Presentación simultánea de pénfigos vulgar y foliáceo / Simultaneous presentation of pemphigus vulgaris and foliaceus / Apresentação simultânea de pênfigo vulgar e foliáceo

El pénfigo foliáceo y el pénfigo vulgar son enfermedades autoinmunes caracterizadas por vesículas y ampollas que se rompen fácilmente dejando erosiones superficiales. Las ampollas están localizadas en diferentes sitios de la epidermis dependiendo del perfil inmunológico con el que cursen. Se reporta el caso de una paciente con presentación simultánea de pénfigo vulgar y pénfigo foliáceo, una asociación de baja incidencia con pocos casos informados en la literatura.

Pemphigus foliaceus and vulgaris are autoimmune diseases characterized by blisters that break easily leaving behind superficial erosions, with different locations in the epidermis depending on the immunologic profile with which they present. We report the case of a patient with simultaneous presentation of pemphigus vulgaris and pemphigus foliaceus, an association of low incidence with few cases reported in the literature.

O pênfigo foliáceo e o pênfigo vulgar são doenças autoimunes caracterizadas por vesicular e bolhas que se quebram facilmente deixando erosões superficiais. As bolhas ficam localizadas em diferentes regiões da epidermes dependendo do perfil imunológico. Reportamos o caso de um paciente com apresentação simultânea de pênfigo vulgar e pênfigo foliáceo, uma associação de baixa incidência com poucos casos informados na literatura.

Doença de Grover associada a Sarcoptes Scabiei: relato de caso / Grover?s disease associated with Sarcoptes scabiei: case report

A doença de Grover, ou dermatose acantolítica transitória, consiste em uma dermatose papulovesiculosa pruriginosa, caracterizada histologicamente por acantólise. A maior parte dos casos está representada por homens brancos acima de 40 anos de idade. Não existeetiologia conhecida, mas o calor e o suor excessivos são descritos com frequência como fatores desencadeantes ou agravantes. O diagnóstico é feito por suspeição clínica e confirmado pela biópsia das lesões cutâneas. Neste estudo é relatado o caso de um paciente de 53 anos de idade, com doença de Grover associada à infestação por Sarcoptes scabiei.

Grover?s disease, or transient acantholytic dermatosis, consists of a papulovesicular pruritic dermatosis histologically characterized by acantholysis. Most cases are represented by white men above 40 years of age. There is no known etiology; however, heat and excessive sweating are frequently described as triggering or aggravating factors. The diagnosis is made by clinical suspicion and confirmed by biopsy of cutaneous lesions. In this study the case of a 53-year-old patient is reported with Grover?s disease associated with infestation by Sarcoptes scabiei.

Pénfigo vulgar tipo cutáneo: Caso clínico / Cutaneous pemphigus vulgaris: A case report

Pemphigus is an autoimmune bullous disease that involves skin and mucous membranes caused by autoantibodies against antigens on the surface of keratinocytes. We report a 30-year-old mole presenting with a five months history of pruriginous alopecic and crusted lesions in the scalp, that extended posteriorly to the trunk and limbs. Mucous membranes were not involved. A skin biopsy was performed, showing extensive loss of epidermis and acantholysis. Immuno fluorescence waspositivefor C3 and intercellular and epidermic IgG. With the presumptive diagnosis of pemphigus vulgaris (PV) without mucous involvement, thepatient was treated with prednisone, observing an excellent clinical response. There are only few cases published in the literature of PV without mucous involvement. Some authors refer to this subtype of PV as "Cutaneous pemphigus vulgaris".

Presentación de un caso de Pénfigo Vulgar / A case report of Pemphigus Vulgaris

El pénfigo es una enfermedad vesículo-ampollosa autoinmune de la piel y mucosas, que puede comprometer grandes extensiones; los tipos vulgar y foliáceo son los más frecuentes, con diferencias inmunopatológicas entre ellas. El pénfigo es tratado con corticoides y Azatioprina pero en los últimos años se incluyeron nuevos medicamentos como inmunoglobulinas, Rituximab (anticuerpo monoclonal quimérico anti-CD20) entre otros, Mostramos un caso de pénfigo hiperpigmentado atípico, y revisamos el tema en especial sobre el tratamiento. Salud UIS 2012; 44 (3): 49-55.

Pemphigus is a blistering autoimmune skin and mucous disease, wich can involve large areas; vulgar and foliaceus types are the most common, with immunological differences between them. The pemphigus is treated with corticoids and azathioprine but in recent years new drugs were included as immunoglobulins, Rituximab (Chimeric monoclonal anti-CD20), among others. We show a case of atypical hyperpigmented pemphigus appearance and the review of issue, especially on treatment. Salud UIS 2012; 44 (3): 49-55.

Inmunopatogenia del pénfigo vulgar y el pénfigo foliáceo / Immunopathogenesis of pemphigus vulgaris and pemphigus foliaceus

El pénfigo vulgar y el pénfigo foliáceo son enfermedades ampollosas autoinmunes mediadas por autoanticuerpos dirigidos contra proteínas de los desmosomas, las desmogleínas 1 y 3. Están asociadas con moléculas del complejo mayor de histocompatibilidad (HLA) que por su estructura tienen la capacidad de presentar péptidos antigénicos de las desmogleínas. En los individuos afectados se han descrito la presencia de linfocitos T y B autorreactivos y alteraciones en la regulación del sistema inmune con desequilibrio de las respuestas Th1/Th2. No se conocen con precisión los mecanismos de daño pero la investigación actual indica que los anticuerpos tienen un papel patogénico, inician diferentes cascadas de señalización que provocan la acantólisis y apoptosis de los queratinocitos. El conocimiento de la inmunopatogenia de las enfermedades ampollosas autoinmunes ha permitido el desarrollo y la puesta en práctica de nuevas alternativas terapéuticas.

Pemphigus vulgaris and pemphigus foliaceus are autoimmune blistering diseases mediated by antibodies against desmosomal proteins. They are strongly associated with major histocompatibility complex alleles with the ability to present antigenic peptides of desmogleins. In the affected individuals the presence of auto-reactive T and B lymphocytes, and alterations in the immune system regulation with imbalance of the Th1/Th2 responses have been described. Damage mechanisms are not yet precisely known but current investigation indicates that antibodies play an important pathogenic role: they start different signaling cascades that lead to acantholysis and apoptosis of keratinocytes. Better knowledge of the pathogenesis of autoimmune blistering diseases has been the basis for the development and implementation of new therapeutic approaches.

Familial benign chronic pemphigus (Hailey-Hailey Disease): use of topical immunomodulators as a modern treatment option / Pénfigo familiar crónico benigno: Informe de un caso

Benign chronic familial pemphigus (Hailey-Hailey disease) is a rare autosomal dominant blistering skin disorder characterized by suprabasal cell separation (acantholysis) of the epidermis. The Hailey brothers first described it in 1939. Hailey-Hailey disease usually appears in the third or fourth decade, although it can occur at any age. Heat, sweating and friction often exacerbates the disease, and most patients have worse symptoms during summer. It is characterized clinically by a recurrent eruption of vesicles and bullae at the sites of friction and intertriginous areas. We report a 51-year-old male presenting with grey-brown hyperkeratosis with partial papillomatosis and lichenification in the axillary and inguinal areas and infiltrated erythematous lesions in the infraorbitary region, on the side of the face. Biopsies obtained from inguinal and axillar areas revealed parakeratotic crusts overlying an acantholytic epidermis. A biopsy from one of the lesions from the infraorbital area showed a Jessner-Kanof lymphocytic infiltration. The patient was treated with antimicrobials and four days later, topical Pimecrolimus was started, leading to an improvement of the clinical picture. The efficacy of Pimecrolimus in our case suggests that cellular immunity couldplay a role in thepathogenesis of Hailey-Hailey disease.

Pénfigo vulgar localizado: presentación atípica del pénfigo vulgar: reporte de caso / Localized pemphigus vulgaris: atypical presentation of pemphigus vulgaris: case report

Se presenta el caso de una paciente de 30 años quien consultó por un cuadro de 10 mesesde evolución, consistente en una placa única eritematosa, bien definida, con una costra en su superficie y de aproximadamente un centímetro de diámetro, poco pruriginosa, en ala nasalderecha. El estudio histológico, reveló acantolisis suprabasal y la inmunofluorescencia directa fue positiva sólo para IgG intercelular. Basados en los hallazgos clínicos e histopatológicos se hace undiagnóstico de pénfigo vulgar localizado. La lesión fue tratada con esteroide tópico de alta potencia,presentándose remisión completa a las dos semanas y luego de seis meses de seguimiento no se han registrado recurrencias.

A 30 years old female patient, with 10-month history ofa single erythematous, well defined plaque, with a cruston the surface, about one centimeter in diameter, slightly pruritic, in the right nasal wing. Histologic examination reported suprabasal acantholysis and direct immunofluorescence was positive for intercellular IgG deposits. Base don clinical and histopathological findings a diagnosis of pemphigus vulgaris localized was made. The patient was treated with high potency topical steroid, with complete remission of the lesion at two weeks of treatment and had no recurrences after six months of monitoring.

Caso para diagnóstico / Case for Diagnosis

Relata-se o caso de paciente do sexo feminino, de 9 anos de idade, com história de lesões bolhosas exclusivamente no dimídio direito, que acomete vários familiares de forma simétrica e cuja histologia evidencia acantólise tipo muro dilapidado, correspondendo, assim, a uma apresentação rara de mosaicismo na doença de Hailey-Hailey.

The case of a 9-year-old girl with a history of blistering lesions restricted to the right side of her body is described. Several family members are also affected in a symmetrical fashion. Histological examination showed acantholysis similar to a "dilapidated brick wall", corresponding to a rare presentation of mosaicism in Hailey-Hailey disease.

Pênfigo foliáceo em um eqüino

Pemphigus foliaceus is an uncommon autoimmune skin disorder affecting various species. A case of a 4-year-old mare of undefined breed, displaying alopecic areas, exsudation and crusty lesions on the face, breast region, and hindlimbs as well as pruritus, is reported. Laboratory exams for mite, bacteria and fungal structures were negative. Histopathological exam revealed an intra-epidermal pustule dermatitis with acantholysis, as well as superficial perisvascular dermatitis with infiltration of eosinophyles, conditions compatible with pemphigus foliaceus.

Pênfigo foliáceo é uma rara afecção cutânea auto-imune que acomete várias espécies. Relata-se o caso de uma égua de quatro anos de idade, sem raça definida, apresentando áreas de alopecia, exsudação e crostas localizadas na face, região peitoral e membros pélvicos, além de prurido. Os exames laboratoriais para pesquisa de ácaros, bactérias e estruturas fúngicas foram negativos. O exame histopatológico revelou uma dermatite pustular intra-epidérmica com acantólise subcorneal, assim como dermatite perivascular superficial, com infiltração de eosinófilos, sendo o quadro compatível com pênfigo foliáceo.

Pênfigo foliáceo em um eqüino

Pemphigus foliaceus is an uncommon autoimmune skin disorder affecting various species. A case of a 4-year-old mare of undefined breed, displaying alopecic areas, exsudation and crusty lesions on the face, breast region, and hindlimbs as well as pruritus, is reported. Laboratory exams for mite, bacteria and fungal structures were negative. Histopathological exam revealed an intra-epidermal pustule dermatitis with acantholysis, as well as superficial perisvascular dermatitis with infiltration of eosinophyles, conditions compatible with pemphigus foliaceus.

Pênfigo foliáceo é uma rara afecção cutânea auto-imune que acomete várias espécies. Relata-se o caso de uma égua de quatro anos de idade, sem raça definida, apresentando áreas de alopecia, exsudação e crostas localizadas na face, região peitoral e membros pélvicos, além de prurido. Os exames laboratoriais para pesquisa de ácaros, bactérias e estruturas fúngicas foram negativos. O exame histopatológico revelou uma dermatite pustular intra-epidérmica com acantólise subcorneal, assim como dermatite perivascular superficial, com infiltração de eosinófilos, sendo o quadro compatível com pênfigo foliáceo.