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The purpose of this study was to evaluate oestrogen receptor alpha staining in a variety of breeds and skin conditions. The influence of inflammation and coat type on the presence and intensity of oestrogen receptor alpha staining was evaluated. Approximately 1700 haematoxylin and eosin (H&E)-stained slides of skin biopsies were screened for presence of small hair bulbs. Slides from 94 cases were submitted for oestrogen receptor alpha immunohistochemistry. H&E-stained skin biopsy tissues were examined for inflammation and hair follicle stages. Oestrogen receptor alpha staining characteristics of telogen follicles, flame follicles, large anagen bulbs, small hair bulbs and early anagen hairs (capped bulbs) were recorded. To assess the influence of inflammation and coat type on oestrogen receptor staining of hair follicle types, chi-square tests, Fisher's exact tests and logistic regression models were performed. Slides were classified as inflammatory (65) and noninflammatory (29). There were no statistically significant differences in oestrogen receptor staining when comparing inflammatory to noninflammatory skin biopsies or skin biopsies from dogs with different coat types. A subset of 13 noninflammatory biopsies from alopecic skin was identified. There was a statistically significant increase in the number of flame follicles in this subset as compared to all others. Comparison of oestrogen receptor staining of hair follicle types from these biopsies and all other biopsies revealed a statistically significant increase in the number of mature telogen hair follicles stained in this subset. No statistical difference in staining of early follicle stages was noted. Therefore, the oestrogen receptor is unlikely to be the controlling factor for the transition from telogen to anagen in the dog. 相似文献
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Hair and hair follicle carriage of Malassezia pachydermatis was studied in 12 healthy beagle dogs. The yeast was isolated from hair clipped from the lip region at 13 sites in nine dogs but was less frequently recovered from the interdigital spaces on the forefeet and from two sites on the trunk. Population sizes at the lip were significantly greater (P < 0.01) than those at other sites. Skin biopsy specimens were obtained from the same sites and epidermal and follicular tissues dissected following immersion in 1 M CaBr(2). Epidermal carriage of M. pachydermatis was identified in nine biopsy specimens taken from five dogs. Hair follicle carriage was identified in five skin specimens (four foot, one lip) from three dogs. This study indicates that M. pachydermatis is readily recovered from the distal hair in healthy dogs and that hair follicle carriage is infrequent or that populations are low at that site. 相似文献
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绵羊高硫角蛋白启动子表达活性研究 总被引：1，自引：1，他引：0
角蛋白是羊毛主要结构蛋白,为了筛选在绵羊毛囊中具有高表达活性高硫角蛋白的内源启动子,本研究以绵羊基因组为模板,克隆得到高硫角蛋白基因启动子B2C,将B2C与去除CMV启动子的pAcGFP1-N1载体连接,构建了重组真核表达载体。采用阳离子脂质体法转染传代培养的绵羊成纤维细胞和去除透明带的小鼠4细胞期胚,分析其表达活性。结果表明,转染后48 h,在蓝光激发条件下可以检测到绵羊成纤维细胞核内及核周围绿色荧光蛋白的高表达,转染72 h后,在核内表达减弱,而细胞质内表达增加;此外,虽然利用病毒启动子构建的GFP表达载体能够在小鼠的早期胚胎细胞中表达,但由B2C启动子与GFP构建的表达载体转染小鼠早期胚胎后,未观察到绿色荧光,表明B2C启动子在绵羊成纤维细胞中具有表达活性,但不能在小鼠早期胚胎中表达。 相似文献
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M. D. Cullen A. Ehrle S. C. Willson J. M. Wilmink D. C. Archer 《Equine Veterinary Education》2022,34(4):e169-e175
A 5-year-old gelding used for showing was presented for surgical repair of a full-thickness 15 mm diameter defect in the right pinna, which had occurred as a delayed complication following laser excision of a sarcoid. The defect had resulted in progressive deformity of the ear, and the horse was considered at risk of further injury if the defect became entrapped on a fixed object. Two artificial dermis meshes were inserted to encourage the formation of granulation tissue across the defect, and a commercially available skin expander was implanted adjacent to the site. Eighteen days later, a second surgery was performed to remove the skin expander and to mobilise a local rotational skin flap to close the defect. Both surgeries were performed under standing sedation and local anaesthesia. The site healed well, avoiding further potential trauma to the ear and deformity due to tissue contracture at the site, although some deformation of the lateral aspect of the cartilage remained. 相似文献
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本实验旨在研究Wnt10b在内蒙古成年绒山羊皮肤中的表达变化规律和褪黑激素(MT)对其表达量的影响。每隔1个月按照2 mg/kg BW的剂量在受试内蒙古成年绒山羊耳后皮下埋植MT。连续采集12个月(从2009年8月到2010年7月)的肩胛部皮肤样品,应用实时荧光定量PCR技术检测Wnt10b的表达量。结果表明:Wnt10b在内蒙古成年绒山羊皮肤组织中毛囊生长中期和休止前期高表达;埋植MT提高了Wnt10b在内蒙古成年绒山羊皮肤组织中毛囊休止期和退行期的表达量。结果提示,Wnt10b参与内蒙古绒山羊毛囊生长的信号传递过程,并在退行期和休止期转变过程中发挥作用;Wnt10b参与了外源MT促绒毛生长的毛囊周期性变化过程。 相似文献
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毛囊的周期性变化和分子调控及其在绒山羊上的研究进展 总被引：4，自引：1，他引：3
毛囊是一个形态和结构较为复杂的皮肤附属器官,它控制着毛发的生长,具有自我更新和周期性生长的特点。毛囊的周期性变化依靠毛囊上皮细胞和真皮间充质细胞的相互作用,先是毛囊长出毛干为生长期,接下来是凋亡驱动的退行期,然后进入休止期。其变化过程是一系列信号分子相互作用形成的,包括启动信号、维持毛囊生长的信号及抑制毛囊生长的信号等。绒山羊初级毛囊和次级毛囊在出生后也表现周期性变化,次级毛囊由于光周期的影响而呈很强的季节性的周期变化,而初级毛囊则变化不明显。山羊绒是绒山羊次级毛囊的衍生物,次级毛囊的生长发育直接影响山羊绒的产量和品质。因此,研究皮肤毛囊周期性变化的规律及它们的分子调控机理不仅可揭示毛囊的发育规律而且对绒山羊的育种具有重要指导意义。 相似文献
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旨在研究Lef-1在小鼠背部毛囊生长周期中的表达规律及其与毛囊生长更替的关系。本试验采用石蜡切片HE染色、Western blotting以及免疫组织化学方法,研究小鼠毛囊的周期性变化,检测Lef-1在小鼠毛囊生长的不同时期皮肤组织中的蛋白表达水平,并对其进行组织定位。结果,昆明系小鼠毛囊生长呈周期性变化,处于不同生长时期的毛囊具有各期的特殊结构;Western blotting结果显示,在各阶段皮肤组织中存在Lef-1蛋白的表达,其在毛囊生长初期的表达量显著高于中期和末期;免疫组织化学结果显示,Lef-1在不同毛囊生长时期的皮脂腺、根鞘和真皮乳头均有不同程度的表达。Lef-1的表达与毛囊的周期性变化存在相关性。 相似文献
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为比较2、35日龄滩羊皮肤毛囊的发育特点与血管内皮生长因子（vascular endothelial growth factor，VEGF）和血管内皮生长因子受体2（vascular endothelial growth factor receptor 2，VEGFR2）的分布特征，探究出生后滩羊被毛生长发育的变化特点，试验应用常规HE染色及改良Masson胶原纤维染色、Gomori银氨法染色、磷钨酸染色等特殊染色观察2与35日龄滩羊皮肤组织结构特点；应用免疫组织化学法结合免疫荧光染色法观察VEGF及VEGFR2在2与35日龄滩羊皮肤组织中的分布定位，并用IPP图像分析软件进行定量分析。结果显示：与2日龄滩羊皮肤组织比较，35日龄滩羊表皮与真皮间界限更加清晰，毛囊结构发育完整；毛囊密度显著降低（P<0.05）；胶原纤维与弹性纤维含量增加，形成网格状分布。免疫组化及免疫荧光结果显示，VEGF及VEGFR2在滩羊皮肤表皮及毛囊外根鞘、皮脂腺上均有表达。统计表明，VEGF及VEGFR2在2日龄滩羊皮肤组织中的表达量均显著高于35日龄（P<0.05）。综合上述结果，滩羊毛囊发育过程中，胶原纤维和弹性纤维增加明显；VEGF与VEGFR2通路在毛囊角质形成中起直接调节作用。 相似文献
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A 25 year-old American Paint gelding was referred to the Onderstepoort Academic Veterinary Hospital with an ulcerated lesion of nonpigmented skin at the right lateral aspect of the perianal region. An infiltrating squamous cell carcinoma was suspected. Surgical excision and ablation with sharp surgical excision and a diode laser was performed although complete excision was not possible due to the tumour location. Intralesional chemotherapy was performed at the completion of the surgical excision and continued in the post-operative period. Histological examination of the excised lesion confirmed a diagnosis of squamous cell carcinoma and revealed incomplete resection margins at the medial, dorsal and ventral aspects of the surgical site. The surgical site healed uneventfully and a re-examination at 6 months post-surgery revealed the gelding to have normal clinical parameters with no perianal lesions. 相似文献
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内蒙古阿尔巴斯绒山羊胎儿期皮肤毛囊发生发育规律研究 总被引：15，自引：0，他引：15
以阿尔巴斯绒山羊胎儿期55d至初生10个阶段的头顶、颈侧、髫甲、颈上缘、肩胛、体侧、背部、荐部、股部、腹部10个部位皮肤为样品，制作横切和纵切切片，观测皮肤毛囊性状的发育规律。结果表明：各部位表皮在胎龄55～65d均形成完整的结构，在胎龄85～95d达到最厚；真皮厚度在胎龄95～125d增长幅度较大。胎龄55d见到初级毛囊原始体，胎龄65d见到次级毛囊原始体，次级毛囊是初级毛囊的一个分支。胎龄85d见到皮脂腺，胎龄95d绒、毛开始形成，见到汗腺，有粗毛长出体表，绒毛在胎龄115d长出体表。各部位初级毛囊在胎龄95～115d增长速度较快，次级毛囊在胎龄105～125d增长速度较快；初级毛囊密度在胎龄75～85d最大，次级毛囊密度在胎龄105～125d达到最大，S／P在胎龄115d至初生时达到最大。胎龄105d已经形成完整的毛囊群结构，主要为三元毛囊群。 相似文献
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毛囊是具有高度的自我更新能力、独特的可再生器官,其周期性变化是一个动态过程,为了研究毛囊差异基因表达变化情况,文章以内蒙古绒山羊生长期毛囊为研究对象,利用Illumina高通量测序技术方法,检测6~10月皮肤毛囊差异基因表达变化情况,寻找对绒毛生长及质量具有调控作用的特异表达基因。试验发现,多数差异基因分别在初级毛囊（PF）的7、8月份和次级毛囊的（SF）8、9月份表达;在绒毛生长期的相邻月份中,发现FAM83C、LOC102185501、FYCO1、CTTNBP2NL、C6orf132、KRTAP29-1 和 CRYBG3 7个共同差异表达基因呈现相同的表达趋势,且在次级毛囊上的表达变化均比初级毛囊滞后1个月。综上所述,次级毛囊在基因表达调控中存在一定的滞后性,这将为绒毛周期生长发育和分子育种提供重要的理论基础。 相似文献
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Chiara Brachelente Ilaria Porcellato Monica Sforna Elvio Lepri Luca Mechelli Laura Bongiovanni 《Veterinary dermatology》2013,24(1):188-e41
Background – Although cutaneous stem cells have been implicated in skin tumourigenesis in humans, no studies have been conducted to elucidate the presence and the possible role of stem cells in hair follicle tumours in the dog. Hypothesis – Stem cell markers are expressed in canine epidermal and follicular tumours and can be used to better understand the biology and origin of these tumours. Animals and Methods – In the present study, normal skin sections and 44 follicular tumours were retrospectively investigated for the immunohistochemical expression of keratin 15 (K15) and nestin. In addition, 30 squamous cell carcinomas were evaluated for K15 expression. Results – In normal skin, K15 and nestin were expressed in the outer root sheath cells of the isthmic portion of the hair follicle (bulge region), and K15 expression was also scattered in the basal cell layer of the epidermis. Infundibular keratinizing acanthomas, pilomatricomas and squamous cell carcinomas were mostly negative for K15, trichoblastomas were moderately to strongly positive, tricholemmomas were either negative or strongly positive, and trichoepitheliomas had heterogeneous staining. Nestin expression was generally faint in all follicular tumours. Conclusions and clinical importance – Our results show that K15 can be a reliable marker for investigating the role of stem cells in hair follicle tumours of the dog, while nestin was judged to be a nonoptimal marker. Furthermore, our study suggests that hair follicle stem cells are present in the bulge region of hair follicles and could possibly play a role in tumourigenesis of canine tumours originating from this portion of the follicle, namely trichoblastomas, tricholemmomas and trichoepitheliomas. The loss of K15 expression in squamous cell carcinomas compared with normal skin suggests that this event could be important in the malignant transformation. 相似文献
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旨在探究KRT16在长毛兔毛囊发育过程中的表达规律及功能。本试验选取12只健康的6月龄皖系长毛兔，于剪毛后在生长期、退行期和休止期选取背部皮肤采样。通过克隆得到兔KRT16基因的编码序列，利用生物信息学软件对KRT16编码序列(CDS)的生物学特性进行初步分析。实时荧光定量PCR(quantitative real-time PCR,qRT-PCR)分析KRT16在毛囊不同时期表达量。在毛囊毛乳头细胞(dermal papilla cell, DPC)中过表达和敲低KRT16,探究KRT16对毛囊生长发育相关基因的调控作用，以及对DPC增殖的影响。结果显示，KRT16基因的编码序列全长1 431 bp,可编码476个氨基酸，在不同哺乳动物中表现出高度同源性。实时荧光定量PCR结果显示，在毛囊发育周期中，KRT16在毛囊发育周期呈现出不同的表达水平，在生长期高表达。通过在兔毛乳头细胞中过表达与敲减KRT16,检测毛囊发育相关基因的表达水平变化，过表达KRT16后，SFRP2和TGFβ1基因的mRNA表达量极显著下降(P<0.01),BCL2、CCND1、EGF、LEF1和CTNNB... 相似文献
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绒山羊皮肤毛囊的研究进展与前景 总被引：3，自引：1，他引：2
作者从绒山羊毛囊的结构特征、发育规律、体外培养、毛囊干细胞及毛囊发育相关的基因等方面概述了目前国内外绒山羊皮肤毛囊的研究进展,并对其前景进行了展望。 相似文献
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【目的】 试验旨在解析鄂尔多斯细毛羊胚胎期次级毛囊诱导期形态发生过程中主要细胞类型的分子特征和分化过程。【方法】 对采集的3只鄂尔多斯细毛羊（胎龄87 d）体侧部（肩胛骨后缘处）的皮肤样本进行HE染色，鉴定毛囊的发育时期；部分皮肤样本经过混样后进行单细胞转录组测序（scRNA-Seq），应用t-分布随机近邻嵌入（tSNE）分析细胞簇，分别使用胶原Ⅰ型α1链（Col1a1）和角蛋白15（Krt15）鉴定真皮谱系细胞和表皮谱系细胞，并使用皮肤组织不同细胞的标记基因进行细胞类型分析；对测序数据进行拟时序分析，探究其分化过程中差异基因的表达；通过GO功能富集分析进一步验证基因的功能。【结果】 HE染色结果发现，鄂尔多斯细毛羊在胎龄87 d处于次级毛囊诱导期。通过scRNA-Seq在胎龄87 d的细毛羊体侧部皮肤细胞样品中获得10 603个细胞和18 704个基因的scRNA-Seq数据可用于下游分析。tSNE分析发现，皮肤组织中共有15个细胞簇；Col1a1和Krt15标记基因鉴定表明，真皮细胞和表皮细胞具有高度异质性。拟时序分析构建毛囊形态发生过程中真皮/表皮细胞谱系细胞的分化轨迹和基因动态表达图谱表明，在真皮谱系细胞由成纤维细胞（Fb）向成熟真皮聚凝物（DC）的分化过程中，多个不同阶段的标记基因FST重组蛋白（Fst）、抑制素亚基βα（Inhba）和转录阻遏物GATA结合1（Trps1）均在拟时序轨道上特异性表达，并富集了Wnt、Noggin和骨形态发生蛋白（BMP）等与毛囊形态发生相关的信号通路；在表皮谱系细胞分化过程中，基质和毛囊间表皮（IFE）的标记基因角蛋白10（Krt10）、同源基因C13（HOXC13）和音猬因子信号（SHH）在表皮谱系细胞拟时序轨道的2个分支上均特异性表达，且富集在细胞增殖和细胞黏附等相关通路。【结论】 在细毛羊次级毛囊诱导期，真皮谱系细胞由成纤维细胞分化至真皮聚凝物，表皮谱系细胞处于基质和毛囊间表皮细胞增殖分化阶段，结果可加深人们对细毛羊次级毛囊形态发生过程的了解，为鄂尔多斯细毛羊育种研究提供有力的理论和技术支持。 相似文献
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为探讨水貂皮肤和毛囊发育机理,试验运用组织学和免疫组化方法对水貂毛皮成熟期皮肤及毛囊中表皮生长因子（epidermal growth factor, EGF）和胰岛素样生长因子-Ⅰ（insulin-like growth factor-Ⅰ,IGF-Ⅰ）及其受体（insulin-like growth factor-Ⅰreceptor,IGF-ⅠR）进行了研究。结果表明,水貂皮肤表皮细胞和毛囊外根鞘细胞中都有IGF-Ⅰ、IGF-ⅠR和EGF基因的强阳性表达,3种基因主要分布于细胞质中,细胞核呈空泡状未见到阳性染色,呈苏木精复染的蓝色,皱褶区域和表皮下胶原结缔组织出现了阳性染色为非特异性阳性结果。IGF-Ⅰ、IGF-ⅠR和EGF基因在水貂皮肤表皮和毛囊外根鞘细胞中广泛表达,直接参与调控皮肤和毛囊的发育。表明EGF、IGF-Ⅰ和IGF-ⅠR基因在水貂皮肤及其衍生结构的发育中发挥着重要作用。 相似文献