LncRNA CALML3-AS1 suppresses papillary thyroid cancer progression via sponging miR-20a-5p/RBM38 axis

Predictive Value of LncRNA LINC01184 in Papillary Thyroid Cancer Development and Prognosis and Its Regulatory Effect on Cellular Processes

INTRODUCTION

This study assessed the potential of lncRNA LINC01184 in predicting PTC progression and prognosis and its regulatory mechanism in PTC cellular processes, aiming to explore a novel biomarker for PTC.

METHODS

The study enrolled 111 PTC patients and collected paired tissue samples. Using PCR, the expression of LINC01184 was analyzed, and its association with patients' clinicopathological features and prognosis was evaluated. The regulatory effects of LINC01184 on cell growth and metastasis were assessed by CCK8 and Transwell assays.

RESULTS

LINC01184 was significantly downregulated in PTC, which was closely correlated with poor differentiation, advanced TNM stage, the occurrence of lymph node metastasis, and poor overall survival. In PTC cells, LINC01184 negatively regulated miR-296-3p, and its overexpression suppressed cell growth and metastasis of PTC, which was reversed by overexpressing miR-296-3p.

CONCLUSION

Downregulated LINC01184 served as a biomarker for PTC. Overexpressing LINC01184 suppressed PTC cell progression via suppressing miR-296-3p.

Clinical significance of LINC01158 in breast cancer and inhibition of proliferation and metastasis of breast cancer cells by regulating miR-711

OBJECTIVE

Breast cancer (BC) has a poor prognosis due to metastasis and recurrence. LINC01158 is aberrantly expressed in breast cancer. Therefore, we investigated the regulatory mechanism and prognostic value of LINC01158 in BC.

METHODS

121 patients with BC were enrolled. LINC01158 and miR-711 levels were analyzed by RT-qPCR. Independent predictors of poor BC prognosis were analyzed by multifactorial Cox regression. Kaplan-Meier curves were used to analyze the 5-year survival rate of BC patients. DLR assay verified the relationship between LINC01158 and miR-711 target binding. CCK-8 was used to detect the proliferative capacity of cells. Transwell was used to analyze cell migration and invasion ability.

RESULTS

In BC tissues and cell lines, LINC01158 expression was reduced and miR-711 levels were elevated. Low expression of LINC01158 resulted in a shortened overall survival of BC patients. LINC01158 binds to the miR-711 target and negatively correlates with the level of miR-711. Overexpression of LINC01158 decreased miR-711 levels and reduced BC cell proliferation, migration and invasion. In addition, Cox regression results showed that LINC01158 was an independent prognostic factor for BC.

CONCLUSION

LINC01158 may be a prognostic marker for BC. Increasing the expression level of LINC01158 could reduce the expression of miR-711, which could inhibit cell proliferation, migration and invasive behaviors, and has the potential to delay the progression of BC.

lncRNA ACVR2B-AS1 modulates thyroid cancer progression by regulating miR-195-5p

BACKGROUND

lncRNAs are key regulators in thyroid cancer (TC). While lncRNA ACVR2B-AS1 has been proposed as a potential TC biomarker, its role remains underexplored. This study aims to clarify its clinical significance in TC and investigate its molecular mechanism.

MATERIALS AND METHODS

qRT-PCR was used to assess the expression of ACVR2B-AS1 in TC tissues and cell lines. Kaplan-Meier survival curves and Cox regression were utilized to assess the prognostic value of ACVR2B-AS1 expression. The interaction between ACVR2B-AS1 and miR-195-5p, as well as their effects on cell viability, migration, and invasion, were evaluated using dual-luciferase reporter assays, CCK-8 assays, and Transwell assays.

RESULTS

ACVR2B-AS1 was significantly upregulated in TC tissues and cell lines, and its expression correlated with TNM stage and lymph node metastasis. Elevated ACVR2B-AS1 levels were associated with poor survival outcomes, and it was identified as an independent risk factor for TC progression. A direct regulatory relationship was established between ACVR2B-AS1 and miR-195-5p, with ACVR2B-AS1 negatively regulating miR-195-5p, thereby promoting TC cell proliferation, migration, and invasion. FGF2 was predicted and validated as a target gene of miR-195-5p.

CONCLUSION

lncRNA ACVR2B-AS1 shows potential as a prognostic marker in TC and may regulate tumor progression through the miR-195-5p/FGF2 axis, offering new insights for TC diagnosis and treatment.

CALML3-AS1 enhances malignancies and stemness of small cell lung cancer cells through interacting with DAXX protein and promoting GLUT4-mediated aerobic glycolysis

The lncRNA CALML3 antisense RNA 1 (CALML3-AS1) is a biomarker for various cancers, including non-small cell lung cancer (NSCLC). However, the role of CALM3-AS1 in small cell lung cancer (SCLC) is still unclear. Here, we found that the CALML3-AS1 was upregulated in SCLC tissues and cells. SCLC cells (NCI-H69 and NCI-H466 cells) were transfected with small interfering RNA of CALML-AS1 (si-CALML3-AS1) and Death domain-associated protein (DAXX) (si-DAXX) or an overexpression vector of CALML-AS1 (dCas9-CALML3-AS1) and DAXX (dCas9-DAXX). The results showed that silencing CALML3-AS1 inhibited SCLC cell proliferation, colony formation, migration, invasion, and spheroid formation, and reduced the expression of stemness marker proteins (Nanog. Oct4, and Lin28). Moreover, silencing CALML3-AS1 reduced glycolysis rate, glucose utilization, and lactate production, and decreased the levels of key glycolytic regulatory proteins (GLUT1, GLUT4, HK2, and PKM2) in SCLC cells, while overexpression of CALML3-AS1 promoted malignant growth and stemness and enhanced glucose transporters type 4 (GLUT4)-mediated aerobic glycolysis by interacting with DAXX in NCI-H69 and NCI-H466 cells. Silencing DAXX or GLUT4, or treatment with 2-Deoxy-d-glucose (2-DG, a glycolysis inhibitor) reversed the effects of CALML3-AS1 overexpression on aerobic glycolysis, malignant growth, and stemness of SCLC cells. Finally, NCI-H69 cells transfected with CALML3-AS1, sh-CALML3-AS1, and sh-DAXX lentiviral vectors were subcutaneously injected into nude mice to construct xenograft models. Knockdown of CALML3-AS1 or DAXX inhibited tumor growth in SCLC in vivo. In conclusion, CALML3-AS1, an oncogene, promotes the malignancy and stemness of SCLC cells by interacting with DAXX to enhance GLUT4-mediated aerobic glycolysis, thereby promoting SCLC progression.

LncRNA CASC9 facilitates papillary thyroid cancer development and doxorubicin resistance via miR-28-3p/BCL-2 axis and PI3K/AKT signaling pathway

BACKGROUND

Papillary thyroid cancer (PTC) is a malignant tumor that poses a serious threat to human health. LncRNA CASC9 serves as an oncogene in numerous tumors. The purpose of this study was to explore the mechanism of lncRNA CASC9 regulating doxorubicin (Dox) resistance in PTC.

METHODS

The expression of CASC9, miR-28-3p and BCL-2 in PTC tissues or dox-resistant cells was determined by quantitative real-time polymerase chain reaction (qRT-PCR) or western blot (WB). CCK-8, colony formation assay, flow cytometry and transwell assay were used to measure the semi-inhibitory concentration (IC50) of dox, cell proliferation, apoptosis and migration, respectively. Dual luciferase reporter gene assays were performed to verify the targeting relationship between miR-28-3p and CASC9 or BCL-2. Rescue experiments were applied to verify the mechanism of CASC9. Finally, the role of CASC9 was verified by xenograft modeling in vivo.

RESULTS

We discovered that CASC9 was enhanced in PTC tissues, cells and Dox-resistant cells (BCPAP/Dox and K1/Dox). Furthermore, CASC9 inhibition markedly restrained the proliferation, migration and facilitated apoptosis of Dox cells. In vivo experiments also showed that silencing of CASC9 inhibited tumor growth. Meanwhile, knockdown of CASC9 sensitized PTC cells to Dox. CASC9 enhanced tumor progression by activating the PI3K/AKT signaling pathway. Furthermore, bioinformatics analysis identified miR-28-3p as a downstream target of CASC9. MiR-28-3p inhibitor reversed the impact of CASC9 knockdown in BCPAP/Dox and K1/Dox. Further studies showed that CASC9 positively regulated BCL-2 expression through miR-28-3p. miR-28-3p weakened Dox resistance, proliferation, migration and accelerated apoptosis of PTC cells via BCL-2.

CONCLUSION

CASC9, as an oncogenic lncRNA, has a promotional effect on Dox resistance and PTC progression via miR-28-3p/BCL-2 axis and PI3K/AKT signaling pathway.

Oxidative stress-induced gene expression changes in prostate epithelial cells in vitro reveal a robust signature of normal prostatic senescence and aging

Oxidative stress has long been postulated to play an essential role in aging mechanisms, and numerous forms of molecular damage associated with oxidative stress have been well documented. However, the extent to which changes in gene expression in direct response to oxidative stress are related to actual cellular aging, senescence, and age-related functional decline remains unclear. Here, we ask whether H2O2-induced oxidative stress and resulting gene expression alterations in prostate epithelial cells in vitro reveal gene regulatory changes typically observed in naturally aging prostate tissue and age-related prostate disease. While a broad range of significant changes observed in the expression of non-coding transcripts implicated in senescence-related responses, we also note an overrepresentation of gene-splicing events among differentially expressed protein-coding genes induced by H2O2. Additionally, the collective expression of these H2O2-induced DEGs is linked to age-related pathological dysfunction, with their protein products exhibiting a dense network of protein-protein interactions. In contrast, co-expression analysis of available gene expression data reveals a naturally occurring highly coordinated expression of H2O2-induced DEGs in normally aging prostate tissue. Furthermore, we find that oxidative stress-induced DEGs statistically overrepresent well-known senescence-related signatures. Our results show that oxidative stress-induced gene expression in prostate epithelial cells in vitro reveals gene regulatory changes typically observed in naturally aging prostate tissue and age-related prostate disease.

Progress in long non-coding RNAs as prognostic factors of papillary thyroid carcinoma

Papillary thyroid carcinoma (PTC) is generally recognized as a slow-growing tumor. However, a small subset of patients may still experience relapse or metastasis shortly after therapy, leading to a poor prognosis and raising concerns about excessive medical treatment. One major challenge lies in the inadequacy of effective biomarkers for accurate risk stratification. Long non-coding RNAs (lncRNAs), which are closely related to malignant characteristics and poor prognosis, play a significant role in the genesis and development of PTC through various pathways. The objective of this review is to provide a comprehensive summary of the biological functions of lncRNAs in PTC, identify prognosis-relevant lncRNAs, and explore their potential mechanisms in drug resistance to BRAF kinase inhibitors, tumor dedifferentiation, and lymph node metastasis. By doing so, this review aims to offer valuable references for both basic research and the prediction of PTC prognosis.

LINC00092 Enhances LPP Expression to Repress Thyroid Cancer Development via Sponging miR-542-3p

LINC00092 is poorly expressed in Thyroid cancer (TC), while its role in TC tumorigenesis is still elusive. This study aimed to reveal the role and regulatory mechanism of LINC00092 in TC.RNA immunoprecipitation and dual luciferase reporter assays were employed to ascertain the relationships among lipoma preferred partner (LPP), miR-542-3p, and LINC00092. qRT-PCR analysis was performed to detect their expression levels in TC. LPP protein productions were evaluated via western blotting. CCK-8, transwell, and colony formation assays were done to estimate TC cells' biological functions. A murine xenograft model was built to observe tumor formation in vivo.LINC00092 overexpression decreased the expression levels of miR-542-3p, and LPP was targeted by miR-542-3p. In TC cells and tissues, the elevation of miR-542-3p, and low amounts of LINC00092 and LPP can be observed. Both LINC00092 and SPAG6 were considered as the antineoplastic factors in TC since their overexpression dramatically repressed TC cells' invasive and proliferative potentials, while miR-542-3p exerted the opposite functions in TC. The ectopic expression of LINC00092 also suppressed tumor growth in vivo. In addition, it revealed that miR-542-3p upregulation reversed LINC00092 overexpression-mediated effects on TC cells. At the same time, the enhanced influences of TC cells caused by miR-542-3p upregulation could be attenuated by the enforced LPP.This study innovatively reveals that LINC00092 acts as an antineoplastic lncRNA to restrain the development of TC via regulating miR-542-3p/LPP. The findings of this study may provide a prospective drug target on LINC00092/miR-542-3p/LPP axis for the treatment of TC.

Aberrantly Expressed lncRNA LINC00847 May Serve as a Promising Prognostic Factor for Thyroid Cancer

Thyroid cancer is a tumor that occurs in the head and neck, which originates from the thyroid follicular epithelial cells. The current research is discussed and elaborated from the perspective of molecular prognostic biomarkers to gain a deeper understanding of the molecular mechanism of thyroid cancer and to provide more effective treatment and prognostic methods for patients. Thyroid cancer patients were explored from histological, cellular and clinical levels. Real-time quantitative polymerase chain reaction (RT-qPCR) was used to detect the expression of LINC00847 and miR-146b-5p in the tissues and cells of the subjects. Cell growth and thyroid cancer progression were determined by the cell counting kit-8 (CCK-8) and transwell assays. The LINC00847 sponge miR-146b-5p was assessed by bioinformatics tools and luciferase reporter assay, and the Kaplan-Meier method and multivariate Cox regression analysis suggested the prognostic value of high expression of LINC00847. In thyroid cancer tissues and cells, the expression of LINC00847 was decreased. Overexpression of LINC00847 remarkably inhibited the proliferation level, migration ability and invasion ability of thyroid cancer cells. Besides, miR-146b-5p was upregulated in thyroid cancer tissues and cells. It was confirmed that LINC00847 targeting miR-146b-5p had a regulatory effect on the progression of thyroid cancer, and LINC00847 was negatively correlated with miR-146b-5p. LINC00847 may be considered a meaningful prognostic marker to influence tumor growth through sponge miR-146b-5p, which provides a new basis for the prognosis and treatment of thyroid cancer.

Integrative single-cell transcriptomic investigation unveils long non-coding RNAs associated with localized cellular inflammation in psoriasis

Psoriasis is a complex, chronic autoimmune disorder predominantly affecting the skin. Accumulating evidence underscores the critical role of localized cellular inflammation in the development and persistence of psoriatic skin lesions, involving cell types such as keratinocytes, mesenchymal cells, and Schwann cells. However, the underlying mechanisms remain largely unexplored. Long non-coding RNAs (lncRNAs), known to regulate gene expression across various cellular processes, have been particularly implicated in immune regulation. We utilized our neural-network learning pipeline to integrate 106,675 cells from healthy human skin and 79,887 cells from psoriatic human skin. This formed the most extensive cell transcriptomic atlas of human psoriatic skin to date. The robustness of our reclassified cell-types, representing full-layer zonation in human skin, was affirmed through neural-network learning-based cross-validation. We then developed a publicly available website to present this integrated dataset. We carried out analysis for differentially expressed lncRNAs, co-regulated gene patterns, and GO-bioprocess enrichment, enabling us to pinpoint lncRNAs that modulate localized cellular inflammation in psoriasis at the single-cell level. Subsequent experimental validation with skin cell lines and primary cells from psoriatic skin confirmed these lncRNAs' functional role in localized cellular inflammation. Our study provides a comprehensive cell transcriptomic atlas of full-layer human skin in both healthy and psoriatic conditions, unveiling a new regulatory mechanism that governs localized cellular inflammation in psoriasis and highlights the therapeutic potential of lncRNAs in this disease's management.