Wilm′s tumor gene1肽疫苗Galinpepimut-S在肿瘤免疫治疗中的应用

目的为Wilm′s tumor gene1(WT1)肽疫苗Galinpepimut-S(GPS)用于肿瘤免疫治疗的后续研究提供参考。方法采用计算机检索中国知网、PubMed等数据库自建库起至2022年12月的肿瘤免疫治疗相关文献,总结GPS在肿瘤免疫治疗中的应用现状。结果GPS能激发自身免疫系统,对WT1抗原产生强烈免疫反应而发挥抗肿瘤作用,在卵巢癌、恶性胸膜间皮瘤、急性髓系白血病、多发性骨髓瘤的治疗中均显示出较好的疗效。结论以GPS为代表的肿瘤疫苗是未来肿瘤治疗的重要方向,需进一步进行临床研究,以获取更多数据。

A Case of Warthin’s Tumor Together with IgG4-Related Sialadenitis

Warthin’s tumor is the second most frequent neoplasm next to pleomorphic adenoma in the salivary gland. The tumor contains the epithelial oncocyte cells with the presence of rich-mitochondria and their surrounding abundant lymphocytes. A relatively new disease entity of IgG4-related disease frequently occurs in the salivary gland. However, the coexistence of Warthin’s tumor and IgG4-related disease is scarcely observed. We have recently experienced a rare case of Warthin’s tumor with IgG4-related sialadenitis. A 51-year-old man presented to our hospital, complaining of a mass with right submandibular tenderness and spontaneous pain. A computed tomography scan of the cervical region revealed a suspicion of lymph node proliferative disease, including malignant lymphoma. Elevated serum levels of IL-2R: 1843 U/ml (reference value 122 - 496 U/ml), IgG: 3430 mg/dl (reference value 861 - 1747 mg/dl), and IgG4: 3140 mg/dl (reference value 11 - 121 mg/dl) were observed. Other laboratory data showed within normal ranges. The cervical tumor was diagnosed as Warthin’s tumor by the findings of fine-needle aspiration cytology and biopsy examination. Immunohistochemistry revealed numerous IgG4- and IgG-positive cells with fibrosis surrounding the epithelial component of Warthin’s tumor, suggesting IgG4-rerated sialadenitis. Finally, we diagnosed the cervical tumor as Warthin tumor with IgG4-related sialadenitis. This is the second report describing a case of Warthin’s tumor with possible involvement of IgG4-related sialadenitis.

Differential Diagnosis of Warthin's Tumor Complicated with Lung Adenocarcinoma by 18F- FDG PET/CT Imaging and Radioisotope Scanning with Tc-99m Pertechnetate:A Case Report and Literature Review

A seventy eight years old male patient underwent a whole body 18F- FDG PET/CT imaging to diagnose the lesion which was showed in the right lung by a chest X ray test and CT scan before. Besides the intense 18F- FDG uptake of the lesion in the right lung, a lesion in the left parotid gland also showed intense 18F- FDG uptake. To evaluate the pathology of the lesion in the left parotid gland, a parotid gland scintigraphy imaging with Tc-99m pertechnetate was done and revealed a Warthin＇s tumor. Later a fine needle aspiration（FNA） confirmed that it was a Warthin＇s tumor.

Solid pseudopapillary tumor of the pancreas:A systematic review of clinical,surgical and oncological characteristics of 1384 patients underwent pancreatic surgery

Background:Pancreatic solid pseudopapillary tumors(SPTs)are rare clinical entity,with low malignancy and still unclear pathogenesis.They account for less than 2%of exocrine pancreatic neoplasms.This study aimed to perform a systematic review of the main clinical,surgical and oncological characteristics of pancreatic SPTs.Data sources:MEDLINE/PubMed,Web of Science and Scopus databases were systematically searched for the main clinical,surgical and oncological characteristics of pancreatic SPTs up to April 2021,in accordance with the preferred reporting items for systematic reviews and meta-analyses(PRISMA)standards.Primary endpoints were to analyze treatments and oncological outcomes.Results:A total of 823 studies were recorded,86 studies underwent full-text reviews and 28 met inclusion criteria.Overall,1384 patients underwent pancreatic surgery.Mean age was 30 years and 1181 patients(85.3%)were female.The most common clinical presentation was non-specific abdominal pain(52.6%of cases).Mean overall survival was 98.1%.Mean recurrence rate was 2.8%.Mean follow-up was 4.2 years.Conclusions:Pancreatic SPTs are rare,and predominantly affect young women with unclear pathogenesis.Radical resection is the gold standard of treatment achieving good oncological impact and a favorable prognosis in a yearly life-long follow-up.

^(99m)Tc-YIGSR as a Receptor Tracer in Imaging the Ehrlich Ascites Tumor-bearing Mice as Compared with ^(99m)Tc-MIBI

The validity of ^99mTc-YIGSR, a novel receptor radio-tracer, in imaging the Ehrlich ascites tumor was evaluated. YIGSR, a pentapeptide of laminin, was labeled with ^99mTc by using a bifunctional chelator S-Acetly-NH3-MAG3. The MIBI was labeled with ^99mTc by following the kit instruction. The mice of tumor group were intravenously injected 1-2 mCi of ^99mTc-YIGSR or ^99mTc-MIBI via caudal vein, immobilized and imaged under a Gamma camera. The same procedure was performed in mice of blockade group, in which the unlabeled YIGSR was previously injected to block the receptor-recognition sites, and inflammation group serving as control. The reverse-phase Sep-Pak C18 chromatogram was found to have an essentially complete conjugation between YIGSR and S-Acetly-NH3-MAG3. The conjugated YIGSR could be radio-labeled successfully with ^99mTC at room temperature and neutral pH, with a radio-labeling yield of 62%. Without the chelator S-Acetly-NH3-MAG3, the YIGSR was labeled with ^99mTc at an efficiency of 4%. The imagological study revealed obvious tumor accumulation of ^99mTc-YIGSR 15 min after the injection, and the uptake peaked after 3 h with a tumor-to-muscle ratio （T/M） of 11.36. The radio-tracer was slowly cleared up and resulted in a T/M of 3.01 at the 8th h after the injection. As for blocked group, the tumor uptake of radiotracer was significantly lower, with the highest T/M being 4.61 after 3 h and 0.89 after 8 h. The T/M was 3.72 at the 3rd h and 1.29 at the 8th h after the ^99mTc-YIGSR injection in the inflammatory group. The T/M was significantly higher in tumor group than in inflammatory group or control group （P〈0.001）. In the ^99mTc-MIBI group, the T/M was 1.40 at the 3rd h and 0.55 at the 8th h after the injection, which showed a significant difference as compared with ^99mTc-YIGSR （P〈0.001）. It is concluded that YIGSR can be successfully radiolabelled by using S-Acetly-NH3-MAG3. ^99mTc-YIGSR has many advantages in tumor imaging, such as quick and clear visualization, high sensitivity and specificity, and satisfactory target/non-target ratio （N/NT）. It promises to be tumor radio-tracer.

微粒体谷胱甘肽S-转移酶1在恶性肿瘤中的研究进展

微粒体谷胱甘肽S-转移酶1(microsomal glutathione S-transferase 1,MGST1)是谷胱甘肽S-转移酶(glutathione S-transferase,GST)超家族和花生四烯酸与谷胱甘肽代谢中的膜相关蛋白(membrane-associated proteins in eicosanoid and glutathione metabolism,MAPEG)超家族的共同成员,它通过催化外源性物质的II相解毒过程,从而保护细胞膜免受氧化应激的损伤。众多研究发现MGST1与恶性肿瘤的发生发展密切相关,有望成为癌症治疗的新型分子靶点。本文就MGST1在恶性肿瘤中的研究进展予以综述。

Effects of Bufalin on Up-regulating Methylation of Wilm's Tumor 1 Gene in Human Erythroid Leukemic Cells

Objective To explore the effects of bufalin on inhibiting proliferation, up-regulating methylation of Wilm’ tumor 1 gene (WT1) as well as its possible mechanisms in human erythroid leukemic (HEL) cells. Methods The HEL cells were treated with bufalin at various concentrations to observe cellular morphology, proliferation assay and cell cycle. The mRNA and protein expression levels of WT1 were detected by reverse transcription polymerase chain reaction (RT-PCR), Western blot and immunocytochemistry, DNA methylation of WT1 and protein expression levels of DNA methyltransferase 3a (DNMT3a) and DNMT3b were analyzed by methylation-specific PCR, and Western blot respectively. Results The bufalin was effective to inhibit proliferation of HEL cells in a dose-dependent manner, their suppression rates were from 23.4%±2.1% to 87.2%±5.4% with an half maximal inhibit concentration (IC50) of 0.046 μmol/L. Typical apoptosis morphology was observed in bufalin-treated HEL cells. The proliferation index of cell cycle decreased from 76.4%±1.9% to 49.7%±1.3%. The expression levels of WT1 mRNA and its protein reduced gradually with increasing doses of bufalin, meanwhile, the methylation status of WT1 gene changed from unmethylated into partially or totally methylated. While, the expression levels of DNMT3a and DNMT3b protein gradually increased by bufalin treatment in a dose-dependent manner. Conclusions Bufalin can not only significantly inhibit the proliferation of HEL cells and arrest cell cycle at G0/G1 phase, but also induce cellular apoptosis and down-regulate the expression level of WT1. Our results provide the evidence of bufalin for anti-leukemia, its mechanism may involve in increasing WT1 methylation status which is related to the up-regulation of DNMT3a and DNMT3b proteins in erythroid leukemic HEL cells.

人血清半胱氨酸蛋白酶抑制剂S及肿瘤标志物在口腔颌面部恶性肿瘤中的诊断价值

目的:探讨人血清半胱氨酸蛋白酶抑制剂S(CST4)、鳞状上皮细胞癌抗原(SCC)、糖类抗原19-9(CA19-9)、可溶性细胞角蛋白组分(CYFRA21-1)在口腔颌面部恶性肿瘤中的诊断价值。方法:选取2022年1—11月于河北医科大学第四医院治疗的232例口腔颌面部恶性肿瘤患者、49例口腔颌面部良性肿瘤患者以及同时期的40例健康体检者为研究对象,分析上述3组人群血清CST4、SCC、CA19-9和CYFRA21-1表达水平,制作ROC曲线评价不同指标对口腔颌面部恶性肿瘤的诊断效能。结果:口腔颌面部恶性肿瘤组的血清CST4、SCC、CYFRA21-1中位数水平明显高于良性肿瘤组和健康对照组,差异均具有统计学意义(P<0.05)。不同部位及不同病理类型口腔颌面部恶性肿瘤患者血清CST4的表达水平无明显差异(P>0.05)。ROC曲线显示血清CST4检测对口腔颌面部恶性肿瘤的诊断价值较高(AUC=0.954,敏感度为97.5%,特异度为78.45%,截断值为74.68 ng/mL),且CST4、SCC和CYFRA21-1三者联合检测对口腔颌面部恶性肿瘤的临床诊断效能更高。结论:血清CST4、SCC和CYFRA21-1在口腔颌面部恶性肿瘤中均高表达,与单独检测血清肿瘤标志物相比,三者联合检测对口腔颌面部恶性肿瘤的诊断具有较高的参考价值,可推荐作为口腔颌面部恶性肿瘤辅助诊断的肿瘤标志物。

半胱氨酸蛋白酶抑制剂S与传统肿瘤标志物在胃肠癌中的诊断价值比较

目的探讨血清半胱氨酸蛋白酶抑制剂S(CST4)在胃肠癌中的临床意义。方法利用血清CST4试剂盒(ELISA法)和化学发光法分别检测80例胃肠癌病人(胃癌40例,结直肠癌40例)和40例正常人对照血清CST4、CEA、CA19-9和CA125浓度,并对检测结果进行统计分析,评估CST4的临床意义。结果胃肠癌组CST4浓度中位数分别为78.272(36.892,188.395)U/L和66.265(39.751,108.890)U/L,均显著高于正常对照组中位数30.920(16.055,56.995)U/L,差异有统计学意义(P<0.05)。胃肠癌患者CST4的ROC曲线下面积(AUC)(分别为0.755、0.754)、胃肠癌早期(一期和二期)CST4的阳性检出率(均为26.9%)和检测灵敏度、特异性、阳性似然比(PLR)、阴性似然比(NLR)、阳性预测值(PPV)和阴性预测值(NNV)等检测指标均优于CEA、CA19-9和CA125。胃肠癌Ⅲ+Ⅳ期患者CST4中位数水平分别为165.653(58.767,334.933)U/L和74.365(41.192,183.306)U/L,均高于胃肠癌Ⅰ期和Ⅱ期患者,胃癌组水平差异有统计学意义(P<0.05)。结论胃肠癌组血清CST4水平显著高于正常对照组,早期阳性检出率和诊断性能优于传统肿瘤标志物,并且与肿瘤预后相关,有望成为新的胃肠癌早期肿瘤标志物。

Electroporation: A New Approach Enhancing Antitumor Effects of Cytoxan

Electrochemotherapy (ECT) is a novel cancer treatment in which electric pulses (EPs) inducing cell membrane pored (electroporation) are used as a means of delivering antitumor drugs to the cytoplasm of cancer cells. In vitro, with scan electromicroscope (SEM) and Trypan blue staining examination, the best parameter of EPs of electroporation is studied by the S-180 cells exposed to EP with various voltages, pulses , capacitance. The best parameter of EP of electroporation is 600V/cm, 6 pulses, 10 μF. In the in vivo study, ECT is studied with the Cytoxan (CTX) injected directly into the tumor followed immediately by a local EP at the tumor site. Four parameters, which include the tumor inhibitory ratio, the curing ratio and the vas capillare of tumor, the tumor’s histopathological characteristics are determined and compared among the ECT group, the control group, the EP-only group and the drug-only group. The results indicate that the antitumor effect of CTX is significantly enhanced by electroporation.

Inhibitory activity of polysaccharide extracts from three kinds of edible fungi on proliferation of human hepatoma SMMC-7721 cell and mouse implanted S180 tumor

AIM To determine the activities ofpolysaccharide extracts from Flammulina velutipes (Curt. ex Fr. ) Sing (FV), Lentinusedodes (LE) and Agaricus bisporus Sing (AB)on the proliferation of human hepatoma SMMC-7721 cells in vitro and on mouse implanted S-180tumors in vivo.METHODS The polysaccharide extracts were isolated from the fruit bodies of FV, LE and AB by the methods of hot-water extraction, Sevag’sremoval of proteins, ethanol precipitation,trypsin digestion and ethanol fractionalprecipitation. Human hepatoma SMMC-7721 cells were treated with 50 mg/L Polysaccharide extracts, and the mitosis index, mitochondria activity and cell proliferation were detected at different times in both control and experimental groups. The mice with S-180 implanted tumors were injected with the polysaccharide extracts at 24 mg/ kg body weight for 9 d and the tumorweight was measured on the 15th day.RESULTS The mitosis index of hepatoma cells in vitro could be significantly decreased by treatment with the polysaccharide extracts fromthe three kinds of edible fungi (P < 0 .005 ). Thecell numbers and mitochondria activity of SMMC7721 cells treated with polysaccharide extracts were lower than those in control groups (P <0.005). The inhibition rates of polysaccharide extracts against implanted S-180 tumors in mice were 52.8%, 56.6% and 51 .9% respectivelycompared with that in c0ntrol gr0ups.CONCLUSI0N The POIysaccharide extractsfrom the three kinds of edible fungi could inhibitnot only the Cultured malignant cells in vitfO butalso impIanted Sl80 tum0r i0 vivo.

耳前大S形切口在腮腺浅叶良性肿瘤切除术中的应用及美学效果观察

目的:探析耳前大S形切口在腮腺浅叶良性肿瘤切除术中的应用及美学效果。方法:选取2018年1月-2021年1月诊治的110例腮腺浅叶良性肿瘤患者为研究对象,所有患者均行腮腺浅叶切除术,其中采用耳前大S形切口(观察组)和传统切口(对照组)各55例,比较两组围术期指标、术后并发症及切口美观满意度,并于术后随访6个月,观察有无肿瘤复发情况。结果:所有患者均顺利完成手术。与对照组比较,观察组切口长度较长,术中出血量、面神经解剖支数较少,创面愈合时间较短,手术总有效率及术后6个月切口美观满意度视觉模拟量表(Visual analogue scale,VAS)评分较高,术后涎瘘及总并发症发生率较低,差异均有统计学意义(P<0.05);两组手术时间、住院时间、术后3个月切口美观满意度VAS评分及术后6个月肿瘤复发率比较差异无统计学意义(P>0.05)。结论:在腮腺浅叶良性肿瘤切除术中采用耳前大S形切口能减少术中出血量和面神经分支解剖数,切口创面愈合快,手术效果好,术后并发症少,切口美观度高,值得临床推广。

STI571 (Glivec) suppresses the expression of vascular endothelial growth factor in the gastrointestinal stromal tumor cell line,GIST-T1

AIM:To estimate whether STI571 inhibits the expressionof vascular endothelial growth factor(VEGF)in thegastrointestinal stromal tumor(GIST)cells.METHODS:We used GIST cell line,GIST-T1.It hasa heterogenic 57-bp deletion in exon 11 to produce amutated c-KIT,which results in constitutive activationof c-KIT.Cells were treated with/without STI571 orstem cell factor(SCF).Transcription and expression ofVEGF were determined by RT-PCR and flow cytometryor Western blotting,respectively.Activated c-KIT wasestimated by immunoprecipitation analysis.Cell viabilitywas determined by MTT assay.RESULTS:Activation of c-KIT was inhibited bySTI571 treatment.VEGF was suppressed at both thetranscriptional and translational levels in a temporal anddose-dependent manner by STI571.SCF upregulatedthe expression of VEGF and it was inhibited by STI571.STI571 also reduced the cell viability of the GIST-T1cells,as determined by MTT assay.CONCLUSION:Activation of c-KIT in the GIST-T1regulated the expression of VEGF and it was inhibited bySTI571.STI571 has antitumor effects on the GIST cellswith respect to not only the inhibition of cell growth,butalso the suppression of VEGF expression.

Colorectal cancer vaccines: Tumor-associated antigens vs neoantigens

Therapeutic options for the treatment of colorectal cancer(CRC) are diverse but still not always satisfying. Recent success of immune checkpoint inhibition treatment for the subgroup of CRC patients suffering from hypermutated tumors suggests a permanent role of immune therapy in the clinical management of CRC. Substantial improvement in treatment outcome could be achieved by development of efficient patient-individual CRC vaccination strategies. This mini-review summarizes the current knowledge on the two general classes of targets: tumor-associated antigens(TAAs) and tumorspecific antigens. TAAs like carcinoembryonic antigen and melanoma associated antigen are present in and shared by a subgroup of patients and a variety of clinical studies examined the efficacy of different TAA-derived peptide vaccines. Combinations of several TAAs as the next step and the development of personalized TAA-based peptide vaccines are discussed. Improvements of peptidebased vaccines achievable by adjuvants and immunestimulatory chemotherapeutics are highlighted. Finally, we sum up clinical studies using tumor-specific antigens-in CRC almost exclusively neoantigens-which revealed promising results; particularly no severe adverse events were reported so far. Critical progress for clinical outcomes can be expected by individualizing neoantigen-based peptide vaccines and combining them with immunestimulatory chemotherapeutics and immune checkpoint inhibitors. In light of these data and latest developments, truly personalized neoantigen-based peptide vaccines can be expected to fulfill modern precision medicine's requirements and will manifest as treatment pillar for routine clinical management of CRC.

SOX与CAPOX方案在胃肠道肿瘤治疗中的血液毒副作用的回顾性研究

目的观察替吉奥+奥沙利铂(S-1and oxaliplatin,SOX)方案及卡培他滨+奥沙利铂(capecitabineandoxaliplatin,CAPOX)方案在胃肠道肿瘤辅助化疗、新辅助化疗及姑息化疗中的血液毒副作用,为临床治疗提供依据。方法回顾性分析中山大学附属第七医院消化医学中心2017年5月至2023年9月的胃肠道肿瘤患者共57例,其中患者予SOX或CAPOX行辅助、新辅助或一线姑息化疗,方案每3周重复,至辅助化疗结束或者转二线姑息化疗。观察严重血液毒副作用的发生率。结果SOX组和CAPOX组比较,3~4度白细胞减少和3~4度贫血的发生率无统计学差异(P=0.40,0.11)。与CAPOX组相比,SOX组3~4度血小板减少的发生率更高(P<0.01),发生时间更早(P<0.01)。结论SOX方案的3~4度血小板减少更常见,发生时间更早。建议在SOX方案中,对血小板减少进行积极的二级预防。

Unusual histological variant of malignant peripheral nerve sheath tumor with rhabdomyoblastic differentiation

Malignant peripheral nerve sheath tumor(MPNST)with rhabdomyoblastic differentiation is called as malignant triton tumor(MTT). It is highly aggressive soft tissue tumor with higher local recurrence rate. MTT has poor prognosis than MPNST. MTT seems to be more aggressive in patients with neurofibromatosis(NF-1). We herein, reporting an interesting case of 55 years male with multiple neurofibromas all over the body since 30 years and multiple café-au-lait spots, diagnosed as NF-1. Since 6 years, he had an enlarged mass in left thigh. Wide excision of mass was done. On histopathological examination revealed the diagnosis of MTT and diagnosis of which was confirmed on immunohistochemistry.

The Origination and Reality of Askin Tumor

Objective\ To study the origination and reality of Askin tumor. Methods\ Twenty two cases of these lesions have been studied by clinical pathologic observation, immunohistochemistry, electron microscopy, and cytogenics in this paper. Results\ The results revealed the positiveness of MIC2(CD99), NSE, Chromogranin A(CgA) by immunohistochemistry, neurosecretory granules by electron microscopy, and the specific genotypic translocation of t (11∶22) (q24∶q12) by cytogenetic analysis, which were identical to the malignant primitive neuroectodermal tumor (PNET). Conclusion\ We conclude that this lesion is actually the one member of the PNET/Ewing′s sarcoma family, except the special location. Differential diagnoses between this tumor and other small round cell sarcomas such as lymphoma, embryonal rhabdomyosarcoma, rhabdoid tumor, round cell liposarcoma and desmoplastic small round cell tumor were also discussed in this article.

吉西他滨联合替吉奥在胰腺癌术后患者中的应用效果

目的探讨吉西他滨联合替吉奥在胰腺癌术后患者中的应用效果。方法根据术后治疗方法的不同将86例胰腺癌患者分为对照组(n=42)和观察组(n=44),对照组患者于术后第6周接受替吉奥治疗,观察组患者在对照组的基础上联合吉西他滨治疗。比较两组患者的临床疗效、肿瘤标志物[糖类抗原125(CA125)、癌胚抗原(CEA)、细胞迁移诱导透明质酸结合蛋白(CEMIP)]水平、免疫功能指标(CD3^(+)、CD4^(+)、CD8^(+))及不良反应发生情况。结果观察组患者的总有效率为45.45%,高于对照组患者的21.43%,差异有统计学意义(P﹤0.05)。治疗后,两组患者CEA、CA125、CEMIP水平均低于本组治疗前,观察组患者CEA、CA125、CEMIP水平均低于对照组,差异均有统计学意义(P﹤0.05)。治疗后,两组患者CD3^(+)、CD4^(+)水平均高于本组治疗前,CD8^(+)水平均低于本组治疗前,观察组患者CD3^(+)、CD4^(+)水平均高于对照组,CD8^(+)水平低于对照组,差异均有统计学意义(P﹤0.05)。两组患者的不良反应总发生率比较,差异无统计学意义(P﹥0.05)。结论吉西他滨联合替吉奥应用于胰腺癌术后患者,可提高临床疗效,降低血清肿瘤标志物水平,改善免疫功能,且不增加不良反应。

Higher production of tumor necrosis factor alpha in hemozoin-fed human adherent monocytes is dependent on lipidic component of malarial pigment:new evidences on cytokine regulation in Plasmodium falciparum malaria

Objective:To investigate whether the increase of tumor necrosis factor alpha is dependent on lipidic component of malarial pigment.Methods:Adherent human monocytes were fed for 3 hours with different meals(native hemozoin;lipid free hemozoin;and control latex particles),then tumor necrosis factor alpha was monitored in cell supernatants up to 48 hours through western blotting or specific enzyme-linked immunoadsorbent assay.In selected experiments,unfed monocytes were treated with different doses of 15(S,R)-hydroxy-6,8,11,13-eicosatetraenoic acid or 4-hydroxynonenal instead of phagocytosis.Results:Hemozoin-fed monocytes produced higher levels of tumor necrosis factor alpha than unstimulated and latex-fed cells, while lipid-free hemozoin did not reproduce these results.Additionally,hemozoin effects were mimicked dose-dependently by 15(S,R)-hydroxy-6,8,11,13-eicosatetraenoic acid,but not by 4-hydroxynonenal.Conclusions:Present data suggest an essential role for lipids in hemozoindependent enhanced release of tumor necrosis factor alpha from monocytes,and 15(S,R)hydroxy -6,8,11,13-eicosatetraenoic acid could be one possible specific mediator.

番茄红素对S_(180)荷瘤小鼠抗肿瘤作用的实验研究

目的 研究番茄红素 (LP)的体内抗肿瘤作用。方法 通过S1 80 肉瘤建立荷瘤小鼠模型 ,给予番茄红素后观察荷瘤小鼠肿瘤生长情况及对小鼠免疫系统和抗氧化酶的影响。结果 给药后能够增强脾脏淋巴细胞增殖能力 ,提高自然杀伤细胞 (NK)活性 ,可升高小鼠血清SOD、GSH Px活性 ,降低MDA含量 (P <0 0 5 )。结论 番茄红素具有明显的抗肿瘤作用 ,其作用可能是通过提高免疫系统功能和机体的抗氧化酶活力来实现的。