雷公藤左旋咪唑混悬液对表皮内Langerhans'cells的影响

目的探讨雷公藤左旋咪唑混悬液对皮肤表皮内Ｌａｎｇｅｒｈａｎｓ＇ｃｅｌ（ＬＣ）的影响。方法室温下经雷公藤左旋咪唑混悬液浸泡人和大鼠皮片３ｈ，采用ＡＴＰ酶法显示表皮片中的ＬＣ。结果显微镜下见：ＬＣ数量减少，胞体浓缩或崩溃变形，树突状结构明显减少。ＬＣ数减少与生理盐水对照有显著性差异。结论雷公藤左旋咪唑混悬液体外浸泡皮片对表皮内ＬＣ的数量和结构均有影响，从而使ＬＣ功能受抑，同种异体皮肤移植排斥延迟。

Targeting epidermal Langerhans cells by epidermal powder immunization

Immune reactions to foreign or self-antigens lead to protective immunity and, sometimes, immune disorders such as allergies and autoimmune diseases. Antigen presenting cells (APC) including epidermal Langerhans cells (LCs) play an important role in the course and outcome of the immune reactions. Epidermal powder immunization (EPI) is a technology that offers a tool to manipulate the LCs and the potential to harness the immune reactions towards prevention and treatment of infectious diseases and immune disorders.

The role of Langerhans cells in oral squamous cell carcinoma

During the initiation, promotion, and progression of multi-step carcinogenesis, changes in specific host immuno- logical factors have been observed. Although immunology of oral cancer has long been focused on antigens and lymphocytes, the fact remains that the antigen presenting cells, like the Langerhans cells （LCs） of the epithelium are initiators and modulators of the immune response. LCs as sentinels of immune response, have been investigated in several orai mucosal diseases, including cancer. Inadequate presentation of tumor antigens by host dendritic cells is one potential mechanism that allows tumor progression, tn this review, the role of LCs in OSCC is discussed. Elucidation of the role of APCs, in particular LCs, may help to better understand the mechanisms underlying anti-tumour immune responses and, improve the effectiveness of anti-cancer immunity in tumour-bearing hosts. This section focuses on the roles LCs in the immunity of cancer and how cancer bypasses the dendritic cell-mediated immune responses, are discussed. Subsequently, the effects of tumor microenviornment on LC＇s and their therapeutic implications are elaborated.

十精丸对光老化大鼠皮肤LCs及炎症因子水平影响的研究

目的:探讨十精丸对于光老化大鼠皮肤朗格汉斯细胞(Langerhanscell,LCs)及体内炎症因子水平的影响。方法:SD大鼠,雌性50只,随机分为模型组、阳性对照组、十精丸低剂量组、十精丸中剂量组、十精丸高剂量组,每组10只。建立皮肤光老化模型,同时给予十精丸干预治疗。实验结束后,通过免疫组化法对大鼠皮肤LCs数量及形态进行观察,病理切片观察皮肤炎性浸润程度,ELISA方法检测皮肤组织和血清中白介素-6(Interleukin-6,IL-6)、肿瘤坏死因子-α(Tumor necrosisfactor-α,TNF-α)含量。结果:免疫组化结果显示,与模型组相比,十精丸各剂量组表皮LCs细胞数目均有所增加,胞体形态改善,树突结构形成增多,细胞间连接紧密。其中十精丸高剂量组改善效果较为显著。病理切片结果显示,十精丸各剂量组大鼠皮肤炎性细胞浸润程度有所改善,十精丸高剂量组改善程度较为明显。ELISA检测结果显示,十精丸各剂量组皮肤组织匀浆及血清中炎症因子IL-6、TNF-α含量均有所下降。其中十精丸中、高剂量组下降明显,差异有统计学意义(P<0.01),与阳性对照组比较,差异无统计学意义(P>0.05)。结论:十精丸能增加光老化大鼠皮肤组织中LCs细胞数量,改善LCs细胞异常形态,减轻大鼠皮肤组织的炎性细胞浸润程度,降低大鼠皮肤组织及血清中炎症因子IL-6、TNF-α的含量,表明十精丸能提高皮肤免疫功能,抑制炎症因子,从而修复皮肤功能,改善皮肤衰老状态。

ASSAY OF S100+ LANGERHANS' CELLS IN CERVICAL CARCINOMA

Langerhans cells (LCs) in the normal cervix (control, 19 cases), cervical carcinoma in situ( CIS, 19 cases) and invasive cervical carcinoma (30 cases), interdigitatlng cells (IDCs) and follicular dendritic cells (FDCs) in obturator lymph node draining Invasive cervical carcinoma were quantitatively assessed by ABC immunohistochemical staining using anti-S100 protein antibody. The results indicated that S100+ LCs in sltu, S100+ IDCs and S100+ FDCs In obturator lymph node showed dendritic features with a specific distribution. Number of LCs in situ in Invasive carcinoma increased significantly when compared with CIS and control groups. There was no change in LCs number between grade Ⅱ and Ⅲ of squemous cell carcinoma. Number of IDCs was significantly less in stage Ⅱ than in stage Ⅰ . FDCs number In different Invasive depthes and clinical stages showed no obvious change. The results suggest that progression of cervical carcinoma is closely related to decrease of LCs hi situ and IDCs in regional lymph node. Predominant Immune response of the host to cervical carcinoma should be cellular immunity.

Patchouli alcohol induces autophagy in human lung adenocarcinoma cells A549 via increasing ratio of LC3 protein II/I and down-regulating p62

Objective:To study the patchouli alcohol(PA)-induced autophagy and proliferation inhibition of lung cancer A549 cells.Methods:the effects of PA at different concentrations on the proliferation and autophagy of A549 cells were detected by Cell Counting Kit-8(CCK-8)and electron microscopy,respectively.The A549 cells overexpressing LC3 gene were constructed by double luciferase lentiviral vector,and were treated with PA at half-inhibitory concentration(IC50)for 24 hours.Fluorescence microscopy was used to observe the fluorescence accumulation in cells.Western blot was used to detect the ratio of LC3 proteinⅡ/Ⅰ.Results:IC50 of PA on A549 cells for 24 h was 300μM.Treatment with 150μM and 300μM of PA for 24 h induced a cytoplasmic autophagic vesicle-like structure appearance in the cytoplasm of A549 cells,and the encapsulated cytoplasmic components were observed in those vesicles.150μM and 300μM of PA also elicited LC3 fluorescent protein accumulation(P<0.05).With the increased concentrations of PA,the ratios of LC3 proteinⅡ/Ⅰwere elevated(P<0.05),and the expressions of autophagy-related protein p62 were decreased gradually(P<0.05).Conclusion:PA can induce autophagy of lung cancer cells A549 by up-regulating the ratio of LC3 proteinⅡ/Ⅰand down-regulating p62 expression,which eventually inhibited the proliferation of lung cancer cells.

SOD1抑制剂LCS-1对弥漫性大B细胞淋巴瘤细胞凋亡的影响

目的:探讨超氧化物歧化酶1(SOD1)在弥漫性大B细胞淋巴瘤(DLBCL)患者肿瘤组织及DLBCL细胞系中的表达,观察SOD1抑制剂LCS-1对DLBCL细胞系增殖与凋亡的影响,并分析其可能的作用机制。方法:采用免疫组化法检测SOD1在DLBCL组织及反应性淋巴结增生组织中的表达水平,Western blot法检测SOD1蛋白在DLBCL细胞株(TMD-8、OCI-Ly10、OCI-Ly18、OCI-Ly19)中的表达情况。用不同浓度的LCS-1处理DLBCL细胞株后,分别采用CCK-8法检测细胞增殖活力、Western blot法检测SOD1蛋白的表达水平、TUNEL法检测细胞凋亡情况。通过KEGG数据库分析SOD1高表达组的基因富集情况。结果:DLBCL患者肿瘤组织和DLBCL细胞系TMD-8、OCI-Ly18、OCI-Ly19明显高表达SOD1。SOD1抑制剂LCS-1对高表达SOD1蛋白的DLBCL细胞株TMD-8、OCI-Ly18、OCI-Ly19的活力均表现出一定的抑制效应,且呈浓度及时间依赖性(r=0.730,r=0.929,r=0.976);OCI-Ly18、OCI-Ly19细胞株经不同浓度的LCS-1处理后,SOD1蛋白表达水平随LCS-1浓度的增加而下降(r=0.860,r=0.970);LCS-1在3μmol/L浓度时可以显著促进DLBCL细胞株OCI-Ly18、OCI-Ly19的细胞凋亡(P<0.001)。KEGG基因富集通路分析显示,在DLBCL中,SOD1可能通过氧化磷酸化(P=0.002,FDR=0.003)、核糖体(P=0.004,FDR=0.005)等途径发挥作用。结论:DLBCL患者肿瘤组织中SOD1的表达水平明显升高。LCS-1作为SOD1抑制剂,可以明显抑制DLBCL细胞株OCI-Ly18、OCI-Ly19的细胞活力与增殖,促进细胞凋亡,这为DLBCL的治疗提供了新的思路。

Recurrent multisystem Langerhans cell histiocytosis involving the female genitalia: A case report

BACKGROUND Langerhans cell histiocytosis(LCH)is a histiocytic proliferative disease caused by clonal proliferation of Langerhans cells,which is currently defined as an inflam-matory myeloid tumor.It is rare in adults,with an incidence of 1–2 per million,and is highly heterogeneous in clinical presentation,with unpredictable disease progression and outcome.CASE SUMMARY A 52-year-old postmenopausal female patient presented to the gynecology department in July 2023 with bilateral vulvar masses.She was diagnosed with recurrent multisystem LCH.The patient had previously been diagnosed with a single-system and single-focal LCH in October 2021 due to a right maxillofacial mass,which resolved after surgical treatment.A chemotherapy regimen was developed after multidisciplinary consultation.Six cycles of chemotherapy resulted in partial remission,and maintenance chemotherapy is currently being administered.CONCLUSION Recurrent LCH involving the bilateral vulva has been poorly reported.Compre-hensive imaging and pathological evaluation is important for diagnosis.The model of joint multidisciplinary specialist diagnosis and treatment is worthy of clinical application.

Multisystemic recurrent Langerhans cell histiocytosis misdiagnosed with chronic inflammation at the first diagnosis:A case report

BACKGROUND Langerhans cell histiocytosis(LCH)is characterized by diabetes insipidus and is an uncommon occurrence.Pathological biopsies still have a certain degree of diagnostic probability.We present a case in which LCH initially affected the pituitary gland.This resulted in a misdiagnosis of chronic inflammation upon pathological examination.CASE SUMMARY A 25-year-old female exhibited symptoms of diabetes insipidus.Magnetic resonance imaging revealed an enhanced foci in the pituitary gland.After surgical resection of the pituitary lesion,the pathological diagnosis was chronic inflam-mation.However,the patient later experienced bone destruction in the skull and lower limb bones.After the lower limb bone lesion was compared with the initial pituitary lesion,the final diagnosis was modified to LCH.The patient was treated with multiple chemotherapy courses.However,the patient’s condition gradually worsened,and she eventually passed away at home.CONCLUSION LCH should be considered when patients exhibit diabetes insipidus and absence of high signal intensity in the pituitary gland on sagittal T1-weighted image and abnormal enhancement in the pituitary region.

38例儿童Langerhans细胞组织细胞增生症临床病理观察

目的探讨儿童Langerhans细胞组织细胞增生症(Langerhans cell histiocytosis,LCH)的临床特点、病理形态学及免疫表型特征,并分析其与预后的关系。方法分析38例儿童LCH的临床及病理资料,其中18例做了免疫组化染色。结果在38例儿童LCH中,单发为30例(占78·9%),多发为8例(占21·1%)。病变发生于骨组织34例(占89·5%)(其中1例伴有皮肤病变),发生于皮肤组织3例,发生于淋巴结1例。镜下病变主要由Langerhans细胞及嗜酸性粒细胞组成。免疫组化结果显示Langerhans细胞阳性表达CD1a为100%(13/13),S-100蛋白为88·2%(15/17),vimentin为90·0%(9/10),CD68为81·8%(9/11),Mac387为30·0%(3/10),lysozyme为40·0%(4/10),CK、EMA、CD45均阴性。结论儿童LCH最多发生于骨组织,在病理学上具有特殊的形态学表现以及免疫组化表型。疾病的预后与病理分型及临床分级有关。

淋巴结Langerhans细胞组织细胞增生症临床病理及免疫组化研究

目的：研究以淋巴结首发的ＬＣＨ形态结构特征、免疫表型、临床表现及鉴别诊断。方法：应用ＨＥ染色和免疫组化ＡＢＣ法标记Ｏ１０和Ｓ－１００阳性以确定诊断。结果：１４例淋巴结ＬＣＨ有４种组合类型：（１）肾形及卵圆形细胞４例；（２）咖啡豆样细胞３例；（３）咖啡豆样及大圆形细胞５例；（４）大圆形细胞２例。结论：咖啡豆样细胞是ＬＣＨ的特征细胞，具有重要诊断价值，嗜酸性粒细胞是ＬＣＨ重要的组成成分之一。根据细胞形态、分化程度和不同组合，ＬＣＨ分为：①反应性，②交界性，③低度恶性，④高度恶性（肉瘤型）。

高梯度磁场免疫磁珠法分离人表皮Langerhans细胞

采用鼠抗人 OKT6单克隆抗体与包被羊抗鼠 Ig G免疫磁珠的特异性结合 ,利用钢毛产生高梯度磁场 ,进行免疫磁珠法分离纯化人表皮 L C。结果表明 LC纯化率超过 99% ,细胞活性超过 95%。该方法简单、快速、价廉、纯化率高 ,不受样本量的限制 ,易在无菌下分离纯化 。

喉癌发生中人乳头瘤病毒感染与Langerhans细胞、p53表达的关系

目的：探讨喉癌的发生机理。方法：应用免疫组化ＬＳＡＢ法对３０例喉鳞状细胞癌人乳头瘤病毒（ＨＰＶ）感染、Ｌａｎｇｅｒｈａｎｓ细胞（ＬＣ）及ｐ５３蛋白表达进行了研究。结果：２６．７％的病例可以检测到ＨＰＶ抗原成分。ＨＰＶ感染的癌旁粘膜内ＬＣ数量明显少于无感染者，且形态也发生改变。ｐ５３蛋白表达阳性率在ＨＰＶ感染组（３７．５％）明显低于ＨＰＶ检测阴性组（８３．３３％）。结论：提示ＨＰＶ、ＬＣ、ｐ５３在喉癌发生发展过程中起一定作用，且相互影响，ＨＰＶ感染引起ＬＣ数量减少，局部免疫功能降低，ＨＰＶ感染还可能通过表达的肿瘤蛋白或其他机制使抑癌基因ｐ５３失活，进而导致肿瘤的发生。

LC/MS/MS鉴定莲子心生物碱在Caco-2细胞中的代谢产物

目的：应用LC/MS/MS鉴定去甲乌药碱、莲心碱、异莲心碱、荷花碱4种莲子心生物碱在Caco-2细胞中的代谢产物,推测其代谢途径。方法：100μmol/L生物碱作用Caco-2细胞3～12 h后收集并纯化样品,采用LC/MS/MS分析鉴定代谢产物。结果：去甲乌药碱的代谢产物有甲基化去甲乌药碱和去甲乌药碱葡萄糖醛酸苷;莲心碱和异莲心碱的代谢产物分别是去甲基莲心碱和去甲基异莲心碱;荷花碱的主要代谢物为莲心碱、异莲心碱和它们的进一步去甲基产物。结论：LC/MS/MS操作简便,可快速鉴定Caco-2细胞中的莲子心生物碱的代谢产物。莲子心生物碱主要代谢途径有甲基化、去甲基化和葡萄糖醛酸化。

宫颈癌浸润淋巴细胞和Langerhans细胞免疫组织化学研究

目的：研究宫颈癌浸润淋巴细胞（ＴｉＬ）、Ｌａｎｇｅｒｈａｎｓ细胞（ＬＣ）分布及与淋巴细胞活性标记物ＨＬＡ－ＤＲ和转铁蛋白受体（ＴｆＲ）的关系。方法：应用ＣＤ４，ＣＤ８，ＯＫＴ１１，ＯＫＴ９，ＨＬＡ－ＤＲ和Ｓ－１００抗体及ＡＢＣ免疫组化法。结果：ＣＤ４，ＣＤ８，ＯＫＴ１１阳性细胞随肿瘤发展而增多，并和转铁蛋白受体（ＴｆＲ）及ＨＬＡ－ＤＲ阳性表达密切关联。ＬＣ细胞数目随肿瘤分期增高和ＴｉＬ密度增加而增多。结论：ＴｉＬ和ＬＣ在宫颈癌中数量增多和活性增高的作用尚不清楚，它可能是宫颈癌局部的免疫反应表现。

改良LCH-Ⅲ方案治疗郎格汉斯细胞组织细胞增生症临床观察

目的观察国际组织细胞协会制定的LCH-Ⅲ方案的治疗效果,提高儿童郎格汉斯细胞组织细胞增生症(LCH)的疗效。方法 36例LCH患儿均经临床、实验室检查及活组织病理检查确诊,按疾病严重程度分为多系统高危险度(Ⅰ组)、多系统低危险度(Ⅱ组)及单系统多发和局限性特殊部位累及(Ⅲ组)3组,采用改良LCH-Ⅲ方案分别以不同化疗强度治疗,按国际组织细胞协会疗效标准进行评价。结果Ⅰ组14例,Ⅱ组10例,Ⅲ组12例。化疗结束时完全缓解50.00%,好转33.33%。随访33例,复发4例(均为Ⅰ组),其中2例原方案再治疗缓解,2例放弃治疗死亡。另1例缓解期死于感染。目前持续缓解中14例,占38.89%。其中Ⅰ组2例(14.29%),Ⅱ组8例(80.00%),Ⅲ组4例(33.33%)。结论改良LCH-Ⅲ方案疗效显著,多系统低危险度组(Ⅱ组)预后较好,多系统高危险度(Ⅰ组)患儿中有缓解后复发,复发患儿原方案治疗仍可能获缓解。

膀胱移行细胞癌Langerhans细胞的研究

膀胱移行细胞癌Ｌａｎｇｅｒｈａｎｓ细胞的研究图１正常膀味粘膜，ＬＣ位于粘膜下间质内，与移行细胞紧密相靠（ＳＩ。Ｏ２００Ｘ）图２移行细胞癌Ⅰ级，癌巢及周围淋巴组织中均可见到ＬＣ（Ｓ１０Ｏ２００×）图３移行细胞癌Ⅱ级，ＬＣ浸润于癌巢中（Ｓ１００２００×）...

食管癌发生过程中Langerhans细胞立体结构的观察

目的 :观察食管癌发生过程中Langerhans细胞 (Langerhanscell,LC)的三维立体结构变化。方法 :采用免疫荧光技术对 2 2例正常食管粘膜、2 0例癌旁组织和 2 3例癌组织中LC进行标记 ,通过激光共聚焦扫描显微镜对LC进行断层扫描和三维立体结构重建。结果 :断层扫描和图象分析显示正常食管粘膜中LC相对面积大 ,形状因子相对值小。癌旁粘膜和癌组织中LC相比面积明显缩小 ,形状因子相对值大 ,正常食管粘膜、癌旁组织和癌组织中LC数量减少 ,胞浆突起逐渐减少 ,立体结构趋向圆形。结论 :食管癌发生过程中LC体积缩小 ,数量减少 ,胞浆突起逐渐减少 ,提示其抗原递呈的功能减退 。

黄芪增免散对围手术期食管癌组织Langerhans细胞的影响

目的观察黄芪增免散对围手术期食管癌组织Langerhans细胞(LC)的影响。方法采用黄芪增免散治疗围手术期食管癌患者36例,观察手术切除食管组织内LC的变化及形态特征。结果与对照组比较,服药组食管癌组织内LC显著增多(P<0.05),且与癌细胞密切接触,反映对癌细胞杀伤作用增强。随着肿瘤分化程度降低,浸润深度增加,LC及间质淋巴细胞数量明显减少(P<0.01),显示肿瘤对机体免疫功能的损害。结论围手术期食管癌患者免疫调节治疗可改善细胞功能。

瘢痕疙瘩中Langerhans细胞的电镜观察

目的:观察瘢痕疙瘩组织中Langerhans细胞的超微结构,探讨其与瘢痕疙瘩形成的关系。方法:应用电镜技术观察瘢痕疙瘩及增生性瘢痕切除标本各6例及4例正常皮肤组织中Langerhans细胞的形态,观察其分布特征。结果:电镜下表皮细胞层中朗格罕细胞核形多不规则,胞质中等电子密度,有较多线粒体和溶酶体,扁平囊泡较多。结论:Langerhans细胞在瘢痕疙瘩组织中功能活跃,Langerhans细胞与瘢痕疙瘩的形成关系密切。