Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization study

BackgroundBreast cancer, a major threat to women’s health worldwide, has mechanisms of onset that remain unclear. Within the human lysosomal system, a class of enzymes known as cathepsins exhibit elevated expression levels in various malignant tumors, suggesting that they may play key roles in cance...

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Main Authors: Shengyi Zhou, Yizhou Sun, Wenzhang Zha, Guangjun Zhou
Format: Article
Language:English
Published: Frontiers Media S.A. 2025-01-01
Series:Frontiers in Oncology
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Online Access:https://www.frontiersin.org/articles/10.3389/fonc.2025.1408723/full
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author Shengyi Zhou
Shengyi Zhou
Shengyi Zhou
Yizhou Sun
Yizhou Sun
Wenzhang Zha
Wenzhang Zha
Guangjun Zhou
Guangjun Zhou
author_facet Shengyi Zhou
Shengyi Zhou
Shengyi Zhou
Yizhou Sun
Yizhou Sun
Wenzhang Zha
Wenzhang Zha
Guangjun Zhou
Guangjun Zhou
author_sort Shengyi Zhou
collection DOAJ
description BackgroundBreast cancer, a major threat to women’s health worldwide, has mechanisms of onset that remain unclear. Within the human lysosomal system, a class of enzymes known as cathepsins exhibit elevated expression levels in various malignant tumors, suggesting that they may play key roles in cancer progression.MethodsThis study employed the two-sample Mendelian randomization (MR) approach to investigate the potential causal relationship between cathepsin levels and the risk of developing breast cancer. Furthermore, we conducted MR analysis using eQTL data to investigate how gene expression, mediated by cathepsins, affects the occurrence of different types of breast cancer and assessed the regulatory effects of cathepsins.ResultsMR analysis revealed that increased levels of cathepsin E are associated with a greater risk of malignant breast tumors (IVW: p = 0.006, OR = 1.103, 95% CI = 1.028–1.184), and increased levels of cathepsin F are associated with an increased risk of in situ breast cancer (IVW: p = 0.031, OR = 1.190, 95% CI = 1.016–1.394). Additionally, cathepsin Z has a protective effect against in situ breast cancer (IVW: p = 0.017, OR = 0.846, 95% CI = 0.737-0.971). Cathepsin E can mediate the effects of APBB1IP, NT5C3B, and ZNF66 on HER2-negative breast cancer, as well as the effects of DHRS9, CDK12, and CD247 on HER2-positive breast cancer. Cathepsin F can mediate the effects of ANXA2R and ZNF605 on in situ breast cancer. Cathepsin Z can mediate the effects of PRX, CRY2, ADCY3, and PELATON on in situ breast cancer.DiscussionThese findings highlight the dual roles of cathepsins as potential risk and protective factors for breast cancer, underscoring their potential in diagnostic and therapeutic strategies.
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spelling doaj-art-2410f1b61f09429796c15713fb4040882025-01-29T09:59:08ZengFrontiers Media S.A.Frontiers in Oncology2234-943X2025-01-011510.3389/fonc.2025.14087231408723Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization studyShengyi Zhou0Shengyi Zhou1Shengyi Zhou2Yizhou Sun3Yizhou Sun4Wenzhang Zha5Wenzhang Zha6Guangjun Zhou7Guangjun Zhou8The First People’s Hospital of Yancheng, Yancheng, ChinaGeneral Surgery Department, Yancheng First Hospital, Affiliated Hospital of Nanjing University Medical School, Yancheng, ChinaSchool of Medicine, Xiamen University, Xiamen, ChinaThe First People’s Hospital of Yancheng, Yancheng, ChinaGeneral Surgery Department, Yancheng First Hospital, Affiliated Hospital of Nanjing University Medical School, Yancheng, ChinaThe First People’s Hospital of Yancheng, Yancheng, ChinaGeneral Surgery Department, Yancheng First Hospital, Affiliated Hospital of Nanjing University Medical School, Yancheng, ChinaThe First People’s Hospital of Yancheng, Yancheng, ChinaGeneral Surgery Department, Yancheng First Hospital, Affiliated Hospital of Nanjing University Medical School, Yancheng, ChinaBackgroundBreast cancer, a major threat to women’s health worldwide, has mechanisms of onset that remain unclear. Within the human lysosomal system, a class of enzymes known as cathepsins exhibit elevated expression levels in various malignant tumors, suggesting that they may play key roles in cancer progression.MethodsThis study employed the two-sample Mendelian randomization (MR) approach to investigate the potential causal relationship between cathepsin levels and the risk of developing breast cancer. Furthermore, we conducted MR analysis using eQTL data to investigate how gene expression, mediated by cathepsins, affects the occurrence of different types of breast cancer and assessed the regulatory effects of cathepsins.ResultsMR analysis revealed that increased levels of cathepsin E are associated with a greater risk of malignant breast tumors (IVW: p = 0.006, OR = 1.103, 95% CI = 1.028–1.184), and increased levels of cathepsin F are associated with an increased risk of in situ breast cancer (IVW: p = 0.031, OR = 1.190, 95% CI = 1.016–1.394). Additionally, cathepsin Z has a protective effect against in situ breast cancer (IVW: p = 0.017, OR = 0.846, 95% CI = 0.737-0.971). Cathepsin E can mediate the effects of APBB1IP, NT5C3B, and ZNF66 on HER2-negative breast cancer, as well as the effects of DHRS9, CDK12, and CD247 on HER2-positive breast cancer. Cathepsin F can mediate the effects of ANXA2R and ZNF605 on in situ breast cancer. Cathepsin Z can mediate the effects of PRX, CRY2, ADCY3, and PELATON on in situ breast cancer.DiscussionThese findings highlight the dual roles of cathepsins as potential risk and protective factors for breast cancer, underscoring their potential in diagnostic and therapeutic strategies.https://www.frontiersin.org/articles/10.3389/fonc.2025.1408723/fullMendelian randomizationcathepsinbreast cancermediation effecteQTL analysis
spellingShingle Shengyi Zhou
Shengyi Zhou
Shengyi Zhou
Yizhou Sun
Yizhou Sun
Wenzhang Zha
Wenzhang Zha
Guangjun Zhou
Guangjun Zhou
Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization study
Frontiers in Oncology
Mendelian randomization
cathepsin
breast cancer
mediation effect
eQTL analysis
title Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization study
title_full Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization study
title_fullStr Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization study
title_full_unstemmed Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization study
title_short Investigating the role of cathepsins in breast cancer progression: a Mendelian randomization study
title_sort investigating the role of cathepsins in breast cancer progression a mendelian randomization study
topic Mendelian randomization
cathepsin
breast cancer
mediation effect
eQTL analysis
url https://www.frontiersin.org/articles/10.3389/fonc.2025.1408723/full
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