Histology and histopathology Vol.39, nº6 (2024)
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- PublicationOpen AccessLong non-coding RNA BRE-AS1 inhibits proliferation, migration and invasion of clear cell renal cell carcinoma by downregulating miR-106b-5p(Universidad de Murcia, Departamento de Biologia Celular e Histiologia, 2024) Zou, Gaode; Guo, Lian; Shen, Shaochen; Song, Zhen; Ouyang, Zheying; Yu, YiObjective. The objective of this study was to investigate the involvement of the long non-coding RNA (lncRNA) BRE-AS1 in clear cell renal cell carcinoma (ccRCC) and to explore its potential therapeutic role. Methods. The expression of BRE-AS1 and miR-106b-5p was determined by qRT-PCR. Overexpression of BRE-AS1 and miR-106b-5p were performed to study their relationship. Transwell assays were used to evaluate cell movement. Methylation-specific PCR (MSP) was performed to explore the role of BRE-AS1 in the methylation of the miR-106b-5p gene. Results. The results showed that the expression levels of BRE-AS1 were decreased, while those of miR-106b-5p were increased in ccRCC tissues. BRE-AS1 was found to be closely associated with the prognosis of patients with ccRCC. The expression of BRE-AS1 was inversely correlated with that of miR-106b-5p in tumor tissues. Overexpression of BRE-AS1 led to decreased expression levels of miR-106b-5p and increased methylation of the miR-106b-5p gene, whereas miR-106b-5p did not affect the expression of BRE-AS1. BRE-AS1 inhibited the movement and proliferation of ccRCC cell lines, while miR-106b-5p suppressed the role of BRE-AS1. Conclusion. BRE-AS1 may suppress ccRCC by downregulating the expression of miR-106b-5p.
- PublicationOpen AccessEffects of sinomenine on a rat orthotopic liver carcinoma model(Universidad de Murcia, Departamento de Biologia Celular e Histiologia, 2024) Zhang, Yunlong; Ran, Hongmei; Hui, Shanshan; Qian, LipingObjective. Liver carcinoma is a common malignant tumor. In this study, an orthotopic liver carcinoma model was established by B-ultrasound, and the therapeutic effect of sinomenine (Sin) on the disease was investigated. Methods. SD rats were randomly divided into control, Sin, Sorafenib (Sor), and combination (Sin+Sor) groups (n=8). An orthotopic liver carcinoma model was established by inoculating N1-S1 cells into the rat liver by B-ultrasound-guided, and tumor volume was monitored three times by B-ultrasound after inoculation. After drug treatment, the tumor tissues were stained with HE and TUNEL, and the levels of inflammatory cytokines, ALT and AST were detected by ELISA. The numbers of erythrocytes, leukocytes and platelets were detected. Immunohistochemistry and immuno-fluorescence were used to detect the expression of Ki-67, CD44, VEGF and CD31. The levels of cell cycle, apoptosis-related proteins were detected by western blot. Results. B-ultrasound monitoring found that Sin reduced tumor volume. Moreover, Sin improved tissue lesions, and promoted cancer cell apoptosis. Sin decreased the levels of inflammatory cytokines, AST and ALT, and decreased the numbers of erythrocytes, leukocytes and platelets. Simultaneously, the expressions of Ki-67, CD44, VEGF and CD31 were decreased in the Sin group. Furthermore, Sin decreased the Bcl-2, Cyclin D1, CDK4, CDK6 and Survivin levels, but increased Bax, Cleaved-caspase3/pro-caspase3, P21 and P27 levels. More importantly, the combination of Sin and Sor treatment was more effective than treatment alone. Conclusion. A rat orthotopic liver carcinoma model was established under the guidance of B-ultrasound, and Sin had a therapeutic effect on orthotopic liver carcinoma.
- PublicationOpen AccessClinicopathological analysis of bronchiolar adenoma combined with lung adenocarcinoma: Report of eight cases and literature review(Universidad de Murcia, Departamento de Biologia Celular e Histiologia, 2024) Zhu, Minsheng; Yang, Qianqian; Zhan, Shenghua; Liu, Weishuo; Liu, Wei; Guo, Lingchuan; Huang, ShanAims. To investigate the clinicopathological characteristics and potential diagnostic pitfalls of bronchiolar adenoma (BA) combined with lung adenocarcinoma (LUAD) in the same lesion. Methods. We analyzed eight cases of BA combined with LUAD from our hospital pathology department between July 2020 and January 2022, and summarized their clinical data, radiological features, histo-pathological characteristics and immunohistochemical phenotypes. Results. Upon macroscopic examination, the lesions were characterized by gray-white or gray-brown solid nodules with well-defined borders, measuring 0.6-1.8cm in maximum diameter. The incidence of proximal-type BA (6/8) was higher than that of distal-type BA (2/8), and they combined with different stages of LUAD, including adenocarcinoma in situ, minimally invasive adenocarcinoma, invasive adenocarcinoma, and invasive mucinous adenocarcinoma (IMA). Immunohisto-chemistry showed that cytokeratin 5/6 and P40 were positive in the continuous basal cell layer in BA, but only scattered positive basal cells were seen at the junction of BA and LUAD. TTF-1 was positive in proximal-type BA ciliated cells in five cases and in LUAD cells in seven cases, and weakly positive in some basal cells. One case of IMA and mucinous cells of BA were TTF-1 negative. There was partially positive Napsin-A expression in BA luminal cells and LUAD cells of all cases except IMA. Conclusion. There is no obvious boundary when BA and LUAD are in the same lesion. The luminal epithelial cells in the area where the two components migrate toward each other are atypical and lack a continuous underlying basal cell layer. Microscopic diagnosis should be aided by immunohistochemistry.
- PublicationOpen AccessRegion-specific response of central microglial cells to sciatic nerve demyelination through sensory and motor pathways(Universidad de Murcia, Departamento de Biologia Celular e Histiologia, 2024) Wu, Shuang; Su, Yuxin; Wang, Yuqing; Wang, Jia; Xu, Dongsheng; Liu, Yihan; Yang, Kunwu; Gao, Junhong; Cui, JingjingPeripheral nerve injury can cause changes in microglial cells on the spinal dorsal and ventral horns. This region-specific response implies that central microglial cells could be activated through both sensory and motor pathways. In order to further determine how peripheral nerve injury activates central microglial cells through neural pathways, the sciatic nerve was selected as the target for neural tract tracing and demyelination. Firstly, we used cholera toxin subunit B (CTB) to map the central sensory and motor territories of the sciatic nerve. Secondly, we applied lysophosphatidylcholine to establish the model of sciatic nerve demyelination and examined the distribution of activated microglial cells via immunofluorescence with ionized calcium-binding adapter molecule 1. It was shown that CTB labeling included the transganglionically labeled sensory afferents and retrogradely labeled somata of motor neurons along the sensory and motor pathways of the sciatic nerve ipsilateral to the injection, in which sensory afferents terminated on the gracile nucleus, Clarke’s nucleus, and spinal dorsal horn, while motor neurons located on the spinal ventral horn. Consistently, after sciatic nerve demyelination, the activated microglial cells were observed in the same territories as CTB-labeling, showing shortened processes and enlarged cell bodies. These results support the idea that central microglia might be activated by signals from the demyelinated sciatic nerve through both sensory and motor pathways.
- PublicationOpen AccessMechanism of Weiwei granules in the treatment of chronic active Helicobacter pylori gastritis with atrophy based on the TLR4/NF-κB/COX-2 inflammatory signaling pathway(Universidad de Murcia, Departamento de Biologia Celular e Histiologia, 2024) Zhang, Haipeng; Liu, HongyanObjective. Our paper aimed to elucidate the mechanism of Weiwei granules in the treatment of Helicobacter pylori (Hp)-positive chronic atrophic gastritis (CAG) based on the TLR4/NF-κB/COX-2 inflammatory signaling pathway. Methods. Hp-positive CAG patients were randomized into the control group (treated with quadruple therapy) or the observation group (treated with Weiwei granules based on the control group). The clinical efficacy, Hp clearance rate, and efficacy of traditional Chinese medicine (TCM) symptoms were compared between the two groups after six months of treatment. The scores of various histopathology variables, serum levels of inflammatory factors (interleukin-6 [IL-6], interleukin-8 [IL-8], and tumor necrosis factor-alpha [TNF-α]), gastrin-17 (G-17) and motilin (MTL), pepsinogen (PG) I and PG II, as well as serum levels of gastrointestinal hormone endothelin (ET), epidermal growth factor (EGF), and calcitonin gene-related peptide (CGRP), were compared between the two groups before and after treatment. TLR4, NF-κB, and COX-2 mRNA levels were compared in gastric mucosal tissues before and after treatment in the two groups. Results. After treatment, the clinical efficacy, Hp clearance rate, and efficacy of TCM symptoms of patients in the observation group were higher than those in the control group. After treatment, the scores of various histopathology variables, serum levels of inflammatory factors (IL-6, IL-8, and TNF-α), gastrointestinal hormones (ET and EGF), and the expression levels of TLR4, NF-κB, and COX-2 mRNA in the gastric mucosal tissues were lower and G-17, MTL, CGRP, and PG I levels were higher in the observation group than in the control group. Conclusion. Weiwei granules can effectively improve Hp-positive CAG patients and reduce the expression levels of TLR4, NF-κB, and COX-2
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