Effect of milk on sebaceous gland spots and the IGF-1/SREBP-1/ACC-1 signaling pathway in golden hamsters / 中华皮肤科杂志

Objective:To investigate the effect of milk on sebum secretion in golden hamsters, and to explore its possible mechanism of action.Methods:Eighteen golden hamsters were randomly and equally divided into 3 groups: blank control group receiving no intervention, whole-milk group gavaged with whole milk, and skimmed-milk group gavaged with skimmed milk. The gavage feeding was performed at a dose of 2.5 ml twice a day for 4 consecutive weeks. The maximum transverse diameter and maximum longitudinal diameter of bilateral sebaceous gland spots were measured on days 0, 7, 14, 21 and 28 after the start of intervention, and the area of sebaceous gland spots was calculated; at 24 hours after the last gavage, bilateral sebaceous gland spot tissues were resected, and subjected to immunohistochemical study to determine the expression of insulin-like growth factor-1 (IGF-1) /sterol regulatory element-binding protein-1 (SREBP-1) /acetyl-coenzyme A carboxylase (ACC-1) signaling pathway in sebaceous gland spots. Statistical analysis was carried out by using repeated measures analysis of variance, one-way analysis of variance for independent groups, Kruskal-Wallis H test, and least significant difference- t test for multiple comparisons. Results:Repeated measures analysis of variance showed that there was no significant difference in the area of sebaceous gland spots of golden hamsters among the 3 groups ( F= 0.96, P= 0.417) . The IGF-1 expression was significantly higher in the skimmed-milk group (0.39 ± 0.03) than in the blank control group (0.35 ± 0.03, t= 2.62, P= 0.021) and whole-milk group (0.33 ± 0.02, t= 3.82, P= 0.002) ; compared with the blank control group (0.36 ± 0.02) , the skimmed-milk group showed significantly increased SREBP-1 expression (0.42 ± 0.04, t= 2.64, P= 0.021) ; the ACC-1 expression was significantly higher in the skimmed-milk group (0.40 ± 0.03) and whole-milk group (0.40 ± 0.05) than in the blank control group (0.34 ± 0.03; t= 2.39, 2.47, P= 0.031, 0.026, respectively) . Conclusion:Milk may promote sebum secretion in golden hamsters through the IGF-1/SREBP-1/ACC-1 signaling pathway.

Case for diagnosis. Verrucous plaque on the pubic region

Abstract Muir-Torre syndrome is a rare, autosomal dominant genodermatosis, characterized by sebaceous neoplasms and visceral carcinomas. The authors describe the case of a patient who, 16 years after the diagnosis of colon carcinoma, presented a verrucous plaque on the pubic region, histopathologically compatible with sebaceous adenoma. The need to investigate this syndrome is emphasized, especially in cases of sebaceous neoplasms located outside the head, face, and neck. Screening for neoplasms in these patients and their families is mandatory.

Effect of pomegranate peel polyphenols on sebaceous gland spots and AKT/Sox9 signaling pathway in golden hamsters / 中华皮肤科杂志

Objective:To evaluate the effect of pomegranate peel polyphenols on sebum secretion in golden hamsters, and to explore its possible mechanisms.Methods:Thirty golden hamsters were randomly and equally divided into 5 groups: (ointment) vehicle group, 0.48%-, 0.96%-, 1.92%-pomegranate peel polyphenol ointment groups, and retinoic acid cream group. Corresponding cream or ointments were applied to bilateral sebaceous gland spots of the golden hamsters at a dose of 1 gram twice a day for 4 consecutive weeks. The area of bilateral sebaceous gland spots was measured on days 0, 7, 14, 21 and 28 after the start of treatment, which was calculated by the maximum longitudinal diameter multiplied by the maximum transverse diameter. Twenty-four hours after the last treatment, immunohistochemical study was conducted to determine the expression of AKT/Sox9 signaling pathway in sebaceous gland spots resected from the golden hamsters. The area of sebaceous gland spots in these groups at different time points was compared by repeated measures analysis of variance, and other data were analyzed by one-way analysis of variance or Kruskal-Wallis H test. Results:The area of sebaceous gland spots was significantly smaller in the 0.96%-, 1.92%-pomegranate peel polyphenol ointment groups (50.48±2.41 mm 2, 48.24±2.56 mm 2, respectively) and retinoic acid cream group (48.31±2.76 mm 2) than in the vehicle group (57.99±3.29 mm 2; t=2.69, 3.98, 3.65, P=0.012, 0.001, 0.001, respectively) . Sox9 expression was significantly lower in the 1.92%-pomegranate peel polyphenol ointment group (0.39±0.04) and retinoic acid cream group (0.38±0.03) than in the vehicle group (0.44±0.02, P=0.040) . However, there was no significant difference in AKT expression among the 5 groups ( F=1.645, P=0.199) . Conclusion:Pomegranate peel polyphenols can reduce the sebaceous gland spot area and inhibit sebum secretion in golden hamsters, which may be related to the inhibition of Sox9 expression.

Effects of resveratrol on expression of inflammatory cytokines and related genes in benzo (a) pyrene-induced human sebocytes / 中华皮肤科杂志

Objective:To investigate the effect of resveratrol on the expression of inflammatory cytokines and related genes in human SZ95 sebocytes induced by benzo (a) pyrene.Methods:Human SZ95 sebocytes were cultured in vitro, and divided into 4 groups: control group treated with 1‰ dimethyl sulfoxide for 27 hours, resveratrol group treated with 1 × 10 -5 mol/L resveratrol for 24 hours, benzo (a) pyrene group treated with 1 × 10 -5 mol/L benzo (a) pyrene for 3 hours, resveratrol+benzo (a) pyrene group treated with 1 × 10 -5 mol/L resveratrol for 24 hours followed by 1 × 10 -5 mol/L benzo (a) pyrene for 3 hours. Real-time fluorescence-based quantitative PCR was performed to determine the mRNA expression of interleukin (IL) -1α, IL-6, aryl hydrocarbon receptor (AhR) , cytochrome P4501A1 (CYP1A1) and cytochrome P4501B1 (CYP1B1) in SZ95 sebocytes in the above groups; Western blot analysis was conducted to determine the phosphorylation level of p38 mitogen-activated protein kinase (p38 MAPK, expressed as the ratio of phosphorylated to total p38 MAPK) and AhR protein expression; enzyme-linked immunosorbent assay (ELISA) was conducted to detect levels of IL-1α and IL-6 in the cell culture supernatant in each group. One-way analysis of variance was used for comparison of means among multiple groups, and least significant difference- t test was used for multiple comparisons. Results:The mRNA and protein expression of IL-1α in SZ95 sebocytes significantly differed among the control group, resveratrol group, benzo (a) pyrene group and resveratrol+benzo (a) pyrene group (mRNA: 2.045 ± 0.272, 2.058 ± 0.154, 3.124 ± 0.094, 2.185 ± 0.337, protein: 9.132 ± 1.181, 9.429 ± 0.771, 20.361 ± 0.907, 9.917 ± 0.897, F=14.662, 101.705, P < 0.01, < 0.001, respectively) , and were significantly lower in the resveratrol+benzo (a) pyrene group than in the benzo (a) pyrene group (both P < 0.01) . In addition, the phosphorylation level of p38 was significantly higher in the benzo (a) pyrene group than in the control group, resveratrol group and resveratrol+benzo (a) pyrene group ( F=303.129, P < 0.000 1) . The mRNA expression of AhR, CYP1A1 and CYP1B1 was significantly lower in the resveratrol+benzo (a) pyrene group than in the benzo (a) pyrene group ( t=10.64, 33.599, 18.327, respectively, all P < 0.001) . The benzo (a) pyrene group showed significantly decreased protein expression of AhR compared with the resveratrol+benzo (a) pyrene group ( P < 0.001) . Conclusion:Resveratrol can inhibit the environmental pollutant benzo (a) pyrene-induced expression of inflammatory factor IL-1α in SZ95 sebocytes, which is likely mediated by the AhR and p38MAPK pathways.

Preputial gland adenoma in a wild nutria (Myocastor coypus): a case report

Sebaceoma on the scalp simulating a malignant pigmented neoplasia

Abstract The correct identification of pigmented nodular lesions of the scalp is often challenging. Despite the importance of clinical patterns and dermoscopy, important adjuvant tools that are usually helpful, their interpretation sometimes is not clear-cut. Here, the authors discuss a case of sebaceoma mimicking a malignant pigmented neoplasia, with conclusive histopathology.

Treatment of enlarged facial pores / 中华皮肤科杂志

Enlarged facial pores remain a common skin concern. Its occurrence is mainly associated with increased sebum production, skin aging (skin laxity and decreased skin elasticity) , increased hair follicle size and other factors, and current treatments for enlarged facial pores mainly target these factors. This review retrospectively summarizes current common treatments, including oral antiandrogens, topical retinoids, chemical peels, lasers, radiofrequency and focused ultrasound. The increasing development of photoelectric devices offers newer and more reliable choices.

Magnifying Endoscopy for Esophageal Ectopic Sebaceous Glands

Ectopic sebaceous glands are found very rarely in the esophagus; heretofore, several cases have been reported. The sebaceous gland is originally a source of an endodermal origin; however, there have been controversies regarding whether the origin of the esophageal ectopic sebaceous gland is ectodermal or endodermal. Ectopic sebaceous glands of the esophagus usually do not cause symptoms; thus, they are often found incidentally on endoscopy for routine health screening. Endoscopic findings are characterized by single or multiple yellow patches or nodular lesions of various sizes, sometimes with small central openings. We report two cases of esophageal ectopic sebaceous glands found incidentally during endoscopy with magnifying endoscopic findings. The lesions were in the mid-esophagus and lower esophagus, respectively, and both endoscopic findings were similar as multiple yellowish patches or plaques. Magnifying endoscopy revealed the openings of the excretory ducts surrounded by circular microvessels in both cases.

Carcinoma de glándulas sebáceas limitado a conjuntiva bulbar / Sebaceous gland carcinoma restricted to bulb conjunctiva

El carcinoma de glándulas sebáceas es un tumor infrecuente que puede desarrollarse a partir de cualquier glándula sebácea en la piel. El 75 por ciento de las veces es de origen ocular y afecta principalmente las glándulas de Zeiss, Meibomio y de la carúncula. Se caracteriza por un comportamiento agresivo, con alta probabilidad de invasión a piel, conjuntiva y córnea. Sin embargo, el compromiso de la conjuntiva como localización primaria es raro. Se presenta un caso con diagnóstico de carcinoma sebáceo de patrón nodular primario de la conjuntiva bulbar, atendido en el Hospital Universitario de Santander durante los años 2014-2016. El propósito del presente estudio es dar a conocer el caso de una patología infrecuente con pocos casos reportados en la literatura, enfatizar su importancia dentro de los diagnósticos diferenciales de masas en la conjuntiva y del estudio histopatológico como método para obtener un diagnóstico definitivo y realizar un abordaje temprano(AU)

Sebaceous gland carcinoma is an uncommon tumor that may derive from any sebaceous gland of the skin. In 75 percent of cases is ocular and mainly affects the Zeiss, Melbonium and caruncle glands. It is characterized for its aggressiveness, high probability of passing into the skin, the conjunctiva and the cornea. However, the involvement of the conjunctiva as a primary location is rare. This is a case diagnosed with sebaceous carcinoma of primary nodullary pattern of the bulb conjunctiva, which was seen at the university hospital of Santander from 2014 to 2016. The objective of the study was to show the case of an infrequent pathology with very few cases reported up to now in literature, to make emphasis on its importance within the differential diagnoses of masses present in the conjunctiva and of the histopathological study as a method to obtain a final diagnosis and to make an early intervention(AU)

The effects of frontal rhytidectomy by BTX-A injection on sebum secretion and quality / 中国医师杂志

Objective To investigate the efficacy of frontal rhytidectomy by different injection site of botulinum toxin type A on sebum secretion and quality.Methods Thirty-two volunteers with forehead ryhtides (moderate to severe) were received frontal rhytidectomy by BTX-A (BOTOX) intramuscular injection which was administered to 5 injective sites,and randomly divided into 2 groups according to different injection site (Dermal injection group and muscle injection group).Baseline and post-treatment (2,4,6,8 weeks after injection) sebum production (the region 0.5 cm far around injection point,the region 0.6 1.5 cm far around injection point) and elasticity were measured.Results Significant reduction of sebum secretion was showed on the regions of 0.5 cm far around injection point and 0.6-1.5 cm far around injection point after BTX-A injection for 4,8 weeks (P ＜ 0.05).4 weeks after treatment,the levels of sebum secretion in two regions were (94.6 ± 10.3)μg/cm2 and (97.2 ± 11.2) μg/cm2,which significantly decreased in dermal injection group than those of muscle injection group [(106.2 ± 12.7)μg/cm2,(107.2 ±9.4)μg/cm2,t =7.62,6.73,P ＜0.05].The levels of R2,R5 and R7 increased significantly in two groups after 4 weeks treatment (P ＜ 0.05),and the levels decreased from 8 weeks after treatment and no significant difference was observed after 16 weeks (P ＞ 0.05).Conclusions Intramuscular injection of BTX-A could reduce the sebum secretion of the region 1.5 cm far around the injection point after 4 weeks and 8 weeks treatment,and increase the elasticity after 4 weeks treatment.

Treatment and pathological observation of demodex canis in beagle dogs / 中国比较医学杂志

Objective Treatment and histopathological observation of demodex canis in beagle dogs .Methods Using the method of direct smear for microscopic examination of demodex canis.Histopathological observation on the skin of the parasitic parts after routine paraffin section and HE staining .Results (1) Clinical observation: The red spots and hair removal was appeared on limbs , eyes, lower abdomen and other parts of the skin of canine patients .The skin of the limbs becomes thicker and wrinkles .(2) Blood routine examination:Basically normal.(3) Microscope observation:The results showed that a large number of worms and eggs of small demodex canis could be found .(4) Histopathological observation:Hair follicles showed a large number of demodex mites and eggs.The sebaceous glands and sweat glands have normal morphology and no mites was found .A large number of eosinophils and neutrophil infiltration were seen around the hair follicles.It was also found that the formation of multifocal granuloma:the granuloma was oval shaped .(5) Treatment programme:The combination of medication and the strengthening of environmental control has been shown to be effective . Conclusions Granuloma caused by demodex canis can be divided into immune granuloma .It may not be possible to destroy the sebaceous glands after infection with small demodex canis.Whether the sebaceous gland is infected with the demodex canis may be associated with the worm species or course of disease .

Carcinoma sebáceo de párpado. Reporte de un caso / Sebaceous carcinoma of the eyelid. Case report

Objetivo: Reportar el caso de una paciente con carcinoma sebáceo de párpado y revisar la literatura. Diseño del estudio: Reporte de caso. Métodos: Se reporta un caso de una paciente con diagnóstico de carcinoma sebáceo de párpado que fue remitida a la Clínica de Oftalmología San Diego Medellín-Colombia, a la consulta de Oncología ocular en el año 2015. Se realizó una revisión detallada de la historia clínica, se tomaron fotos a color previa firma de consentimiento informado por parte de la paciente y se realizó biopsia e inmunohistoquímica respectiva. Se cuenta con la aprobación el comité de ética médica de la Universidad Pontificia Bolivariana. Resultados: Reporte de carcinoma sebáceo de párpado. Mujer de 66 años a la que se le hizo diagnóstico de carcinoma sebáceo de párpado luego de resección y se confirmó con el estudio anatomopatológico y de inmunohistoquímica. Se realizaron estudios de extensión en busca de metástasis a distancia. Conclusión: El carcinoma sebáceo de párpado es una entidad poco frecuente en la práctica clínica oftalmológica siendo estas lesiones fácilmente confundidas con lesiones benignas como chalazión y blefaroconjuntivitis por la poca familiaridad del especialista con la enfermedad. Es necesario tener un alto índice de sospecha y saber que existe para tratar esta entidad de manera oportuna evitando intervenciones no indicadas en este tipo de lesión.

Objective: To report the case of a patient with sebaceous carcinoma of the eyelid and literature review. Study Design: Case report. Methodology: A case of a patient diagnosed with sebaceous carcinoma of the eyelid which was referred to the oncology service to Clinic of Ophthalmology San Diego Medellin-Colombia in 2015. A detailed review of the medical history and photography documentation was done. Results: Sebaceous carcinoma of the eyelid was reported. A woman of 66 years old who has had diagnosis of eyelid sebaceous carcinoma after resection and confirmed with histopathologic and immunohistochemical study. Extension studies were conducted in order to rule out metastases. Conclusion: The sebaceous carcinoma of the eyelid is a rare entity in the ophthalmological setting and could be easily confused with benign lesions such as blepharitis and chalazion for those ophthalmologists unfamiliar with this condition. A high index of suspicion of this entity is recommended in a timely manner to avoid interventions that are not indicated in this type of lesion.

Demodicosis: revisión de la literatura / Demodicosis: review of the literature

La demodicosis es una patología cutánea crónica caracterizada por lesiones eritemato-maculares pruriginosas, cuyo agente causal son ácaros foliculares del género Demodex. Presenta un abanico amplio y polimorfo de manifestaciones clínicas, donde la sospecha clínica se presentará frente a una erupción facial crónica persistente o recurrente, resistente a terapia convencional y de distribución asimétrica. El diagnóstico definitivo es difícil, y requiere un cuadro clínico compatible y la presencia de alta densidad de Demodex. El siguiente documento hace una revisión de conceptos con respecto a la patogenia, clínica, diagnóstico y tratamiento de esta entidad.

Demodicosis is a chronic skin condition characterized by itchy erythematous macular lesions whose causal agents are gender follicular Demodex mites. This entity presents a wide and polymorphous range of clinical manifestations, in which clinical suspicion appears in case of persistent or recurrent chronic facial rash, resistant to conventional therapy and with an asymmetric distribution. The definitive diagnosis is hard to reach, and requires a compatible clinical picture and a high density of Demodex. The following document is a review of concepts regarding pathogenesis, symptoms, diagnosis and treatment of this disease.

Nevus Lipomatosus Cutaneous Superficialis with Ectopic Sebaceous Glands on the Neck / 대한피부과학회지

No abstract available.

Caracterización clinicopatológica de los tumores malignos palpebrales / Clinical and pathological characterization of palpebral malignant tumors

OBJETIVOS: describir las características clinicopatológicas de los tumores malignos palpebrales. MÉTODOS: estudio descriptivo y retrospectivo de pacientes con diagnóstico histopatológico de carcinoma basocelular, epidermoide y adenocarcinoma de glándulas sebáceas, atendidos en el Servicio de Oculoplastia del Instituto Cubano de Oftalmología, de enero de 2005 a diciembre de 2010. Se incluyó un total de 109 pacientes; se analizó la edad, el sexo, el color de la piel, las formas clínicas, la localización anatómica, el grado de diferenciación celular y la frecuencia anual. RESULTADOS: el grupo de edad entre 60 y 79 años constituyó el 50,5 % de los casos. El sexo masculino constituyó el 47,7 % y el femenino el 52,3 %. El carcinoma basocelular se presentó en el 68,8 % de los pacientes, el carcinoma epidermoide en el 19,3 % y el adenocarcinoma de glándulas sebáceas en el 11,9 %. La piel blanca mostró el 88 % de los casos; el carcinoma basocelular nodular estuvo presente en el 53,3 % y la noduloulcerativa en 33,3 %. En el párpado inferior se presentó el carcinoma basocelular en el 69,3 % y el epidermoide en el 66,7 %. El 44,1 % de los diagnósticos histopatológicos fueron moderadamente diferenciados. Mostró 21 casos de carcinoma basocelular en el 2009; 7 de carcinoma epidermoide en el 2007 e igual número de casos de adenocarcinoma de glándulas sebáceas en el 2010. CONCLUSIONES: más de la mitad de los pacientes que presentan tumores malignos palpebrales son adultos mayores, femeninos y blancos. Se evidencia la totalidad de las formas clínicas de presentación; predomina en el párpado inferior el carcinoma basocelular y el epidermoide. La mayoría de los casos muestra grado de diferenciación celular moderado y la frecuencia anual tiene disímil comportamiento.

OBJECTIVES: to describe the clinicopathological features of malignant eyelid. METHOD: a descriptive, retrospective study of patients with histopathologic diagnosis of basal cell carcinoma, squamous cell and adenocarcinoma of sebaceous glands, assisted in the service of oculoplasty the Cuban Institute of Ophthalmology January 2005 to December 2010. It was included 109 patients; we analyzed age, sex, skin color, clinical symptoms, anatomic location, degree of cell differentiation and annual basis. RESULTS: 60 to 79 years occurred in 50,5 %. It was 47,7 % were male and female 52,3 %. The basal cell carcinoma was present in 68,8 %, squamous cell carcinoma in 19,3 % and adenocarcinoma of sebaceous glands in (11,9 %. White skin was 88 %. Nodular basal cell carcinoma in 53,3 %, the nodule-ulcerative in 33,3 %. In the lower eyelid basal cell carcinoma showed a 69,3 % and 66,7 % epidermoid. The 44,1 % of the histopathological diagnoses were moderately differentiated. Showed 21 cases of basal cell carcinoma in 2009, 7 squamous cell carcinoma in 2007 and an equal number of cases of adenocarcinoma of sebaceous glands in 2010. CONCLUSIONS: over half of the patients were elderly, female and white, showed all the clinical forms predominated in the lower eyelid basal cell carcinoma and squamous cell, most of the cases showed degree of cell differentiation moderate annual rate showed dissimilar behavior in the period under study with more cases in 2009.

Possible Existence of Melanocytes or Melanoblasts in Human Sebaceous Glands

BACKGROUND: Melanocytes are present in both basal epidermis and hair follicles. Melanocyte stem cells have been found in hair follicle bulge. During embryogenesis, the outer cells of the bulge differentiate into the sebaceous gland (SG) and proliferate. OBJECTIVE: To identify and determine the distribution and morphological characteristics of melanocytes in human SGs. METHODS: A total of 171 biopsy specimens of face and scalp were studied. Of these specimens, 103 samples contained SGs. We conducted a retrospective review of slides stained with H&E, F-M, anti-S100, anti-c-kit, anti-HMB-45, anti-CD1a, anti-MITF, and anti-tyrosinase. The presence and distribution of melanocytes in human SGs was also evaluated by electron microscopy. In addition, melanocytes were isolated from SGs for primary culture. RESULTS: S-100-positive cells were observed mainly at the periphery of SGs in 34 of 54 specimens. We did not find F-M-positive and HMB-45-positive cells in SGs. CD1a-positve cells were identified in two specimens. We also found c-kit-, MITF-, and tyrosinase-positive cells in SGs. Electron micrograph showed the presence of melanocytes in the suprabasal portion of SGs. These melanocytes showed fewer melanin-containing granules than the melanocytes of basal epidermis. However, the individually distributed melanosomes in suprabasal melanocytes were larger than those in epidermal melanocytes. Primary culture of melanocytes derived from SGs showed morphologically homogeneous, slender cell bodies with few dendrites. CONCLUSION: Our study confirms the presence of non-melanogenic melanocytes and Langerhans cells in human SGs. In addition, the characteristics of the melanocytes in SGs were found to be different from those of the epidermal melanocytes.

Inguinal ulcerated sebaceous carcinoma: an unusual presentation / Carcinoma sebaceo inguinal ulcerado: apresentacao incomum

Sebaceous carcinoma is a rare and aggressive skin tumor. It can be located in any area of the body, the most commonly involved area being the periorbital region. It does not entail a typical clinical presentation, which explains the often late diagnosis. The aim of this report is to outline the rarity of the disease and its atypical clinical description, since to this day, inguinal ulcers with clinical manifestation have not been reported. We present and discuss a case of sebaceous carcinoma with an unusual clinical presentation, in an elderly male patient. The precise approach to genital ulcers, as shown in this case, is a diagnostic challenge that requires a great deal of effort on the part of the clinician.

O carcinoma sebáceo é um tumor cutâneo raro e agressivo. Pode localizar-se em qualquer área do corpo sendo a região periorbital a mais comumente envolvida. Ele não tem uma apresentação clínica típica, o que explica o diagnóstico frequentemente tardio. O objetivo deste relato é apresentar a raridade da doença e uma descrição clínica atípica, uma vez que, até a presente data, não foi relatada úlcera inguinal como manifestação clínica. Apresentamos e discutimos um caso de carcinoma sebáceo, com uma apresentação clínica incomum em um paciente idoso do sexo masculino. A abordagem de úlceras genitais, como mostrado no presente caso, é um desafio diagnóstico que requer uma grande quantidade de esforço por parte do clínico.

Effect of tetrachlorodibenzo-p-dioxin on the expression of cytochrome P4501A1 in human SZ95 sebocytes and its significance / 中华皮肤科杂志

Objective To estimate the effect of the enviromental pollutant 2,3,7,8-tetrachlorodibenzo-pdioxin (TCDD),a representative of the dioxin family,on the expression of cytochrome P4501A1 (CYP1A1) in cultured human immortalized SZ95 sebocytes in vitro,so as to improve understanding of the pathogenesis of chloracne.Methods SZ95 sebocytes were cultured with or without the presence of 10 nmol/L TCDD for two hours or three days.Real time fluorescence-based PCR was performed to quantify the mRNA expression of CYP1A1,immunohistochemistry and Western blot to determine the expression level of CYP1A1 protein,in the SZ95 cells.Chi-square test was done to compare the protein and mRNA expressions of CYP1A1 between untreated and treated SZ95 cells.Results Real time PCR showed that the mRNA expression of CYP1A1 was low in SZ95 sebocytes,and increased by 5.622 times after 2-hour treatment with TCDD(P ＜ 0.05).Immunohistochemistry revealed a weak expression of CYP1A1 protein in the cytoplasm and nuclei of untreated SZ95 sebocytes,which was also significantly enhanced by the TCDD treatment.Western blot results showed that the relative expression level of CYP1A1 protein was 4.233 ± 0.252 in SZ95 sebocytes treated by TCDD for three days,significantly higher than that in untreated sebocytes(0.123 ± 0.208,P ＜ 0.05).Conclusions There is a low expression of CYP1A1 mRNA and protein in SZ95 sebocytes,which can be upregulated by TCDD,suggesting that the CYP1A1 gene is a downstream target of the aryl hydrocarbon receptor responsible for the abnormal differentiation of human sebocytes.

Achado incidental de glândula sebácea em colo uterino: provavelmente um processo metaplásico / An incidental finding of sebaceous glands in the uterine cervix: a probable metaplastic process

As glândulas sebáceas ectópicas são achados muito infrequentes no trato genital feminino. Descrevemos um caso que ocorreu em paciente de 42 anos de idade, submetida à histerectomia total, devido à leiomiomatose e ao prolapso uterino.

The ectopic sebaceous glands have been extremely rare findings in female genital system. We describe the case of 42 years-old patient with total hysterectomy due to leiomyomatosis and uterine prolapsed.

A Case of Ectopic Sebaceous Glands in the Esophagus

Most ectopic sebaceous glands have been reported in the organs of ectodermal origin such as the lips, oral cavity, salivary glands, nipples, palms & soles, and genitals. Ectopic sebaceous glands in the esophagus are extremely rare conditions, because esophagus is an organ of endodermal origin. Whether the histogenesis of these lesions are embryological misplacement or acquired metaplasia remains unclear. We report a case of ectopic sebaceous glands in the esophagus diagnosed by endoscopic biopsy, with a brief review of the histogenesis. This case was followed up after 1 year. There were no significant changes, but the lesions had increased slightly in number compared with the last examination. When the number of lesions increase as in our case, acquired metaplasia is the most likely cause.