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Table 1 Roles of piRNAs/PIWI complex in biological processes in human diseases

From: Novel roles of PIWI proteins and PIWI-interacting RNAs in human health and diseases

Regulatory mechanisms

piRNA/PIWI

Expression

Diseases

Targets/signaling pathway

In vitro

In vivo

Ref.

Abnormal cell cycle and Resistance to apoptosis

piR-823

up

Colorectal cancer

HSF1

Promote cell cycle and inhibit cell apoptosis

NA

[90]

 

piR-017061

down

Pancreatic cancer

ERK signaling pathway

Inhibit cell growth and induce apoptosis

Attenuate the volumes and weights of the xenografts in vivo

[91]

 

piR-36,712

down

Breast cancer

P53 signaling pathway

Suppress cell proliferation, migration and invasion

Lower tumor growth rate

[92]

 

piR-004800

up

Multiple Myeloma

PI3K/Akt/mTOR Pathway

Promote proliferation and inhibit apoptosis and autophagy

Promote MM proliferation

[93]

 

piR-8041

down

Glioblastoma

NA

Induce cell cycle arrest and apoptosis

Restrict tumor growth temporarily

[94]

 

PIWIL1

up

Glioblastoma

CDKN1B and CCND2

PIWIL1 knockdown causes cell cycle arrest, and induces apoptosis and promotes senescence.

PIWIL1 Knockdown reduces Tumor Growth and improves survival

[95]

 

piR-30,188/PIWIL3

down

Glioblastoma

OIP5-AS1/miR-367/CEBPA/TRAF4 pathway

Suppress tumor cell proliferation, invasion, and migration, and promotes apoptosis

Restrain tumor growth and prolong nude mice survival

[96]

 

piR-651

up

Non-small cell lung carcinoma

Cyclin D1 and CDK4

Promote cell cycle progression in G2/M phase

Promote tumor growth

[97]

 

piR-651

up

Non-small cell lung carcinoma

Mitochondria-dependent pathway

Promote cell proliferation in a time-dependent manner and inhibits apoptosis, Promote NSCLC cell migration and invasion

NA

[98]

 

PIWIL2

up

Esophageal squamous cell carcinoma

NF-κB signaling pathway

Promote cell proliferation, inhibit apoptosis, and activate autophagy

Promote tumor growth

[99]

Aberrant proliferative signaling pathways

piR-31,115

up

Clear cell renal cell carcinoma

PI3K/AKT Pathway

Promote cell proliferation, invasion and metastasis

NA

[100]

 

piR-001773 and piR-017184

up

Prostate cancer

PI3K/AKT Pathway

Promote cell growth, invasion, and migration

Promote PCa cell growth, invasion, and migration

[101]

 

piRNA-823

up

Luminal breast cancer

Wnt/β-catenin signaling pathway

Acquire stem cell-like properties, promote cell proliferation

Promote tumor growth

[102]

 

piR-55,490

down

Lung cancer

Akt/mTOR pathway

Reduce the proliferation

Suppress the growth of xenografts

[103]

Activation of invasion and metastasis

piR-57,125

down

Clear cell renal cell carcinoma

AKT/ERK signaling pathway

Restrain cell metastasis

Knockdown of piR-57,125 promotes ccRCC cells metastasis

[104]

 

piR-19,166

down

Prostate carcinoma

CTTN/MT1-MMP/MMP2/MMP9 signaling pathway

Hinder cell migration

Reduce the number and size of metastatic nodules

[105]

 

piR-39,980

up

Osteosarcoma

MMP2

Induce the proliferation and enhance the invasion and metastasis

NA

[106]

 

piR-54,265

up

Colorectal cancer

MMP2 and MMP9

Promote proliferation, migration and invasion

Promote tumor growth, spread and metastasis.

[107]

 

PIWIL2

up

Prostate cancer

MMP9

PIWIL2 knockdown weakened tumor cell invasion and migration

NA

[108]

 

PIWIL1

up

Pancreatic cancer

Pinin

Increase the proliferation, invasion and metastasis

Promote growth and metastasis of xenografts

[109]

 

piRNA-823

up

Multiple myeloma

VEGF and IL-6

Promote angiogenesis and invasion

Promote the growth of xenograft tumors

[110]

 

piRNA-823

up

Multiple myeloma

VEGF

Promote proangiogenic activity

Promote the growth of xenograft tumors

[111]

EMT

piR-17,560

up

Breast cancer

FTO/ZEB1 signaling pathway

Promote the proliferation, EMT and chemoresistance

Increase tumor volume under chemotherapy drug treatment

[112]

 

piR-31,115

up

Clear cell renal cell carcinoma

NA

Promote migration and invasion

NA

[100]

 

PIWIL1

up

Endometrial cancer

NA

Endow endometrial cancer [EC] cells with stem-like properties, such as tumor cell viability, migration, invasion, and sphere-forming activity.

Increase tumor growth

[113]

 

piR-1037

up

Oral squamous cell carcinoma

NA

Enhance the motility

Increase tumor growth

[114]

Energy metabolism

piR-823

up

Colorectal cancer

PINK1-Parkin mediated mitophagy

Maintain mitochondrial function, dynamics, and quantity

Block mitophagy, increases tumor volume and tumor weight

[115]

 

piR-hsa-211,106

down

Lung Adenocarcinoma

Pyruvate carboxylase

Attenuate cell proliferation and colony formation

Suppress tumor xenograft growth

[116]

 

PIWIL2

up

Radiation-induced pulmonary fibrosis

Purine metabolism

Activate purine metabolism and promote the attenuation of RILF

Alleviate pulmonary fibrosis

[117]

 

PIWIL1

up

Hepatocellular carcinoma

MLYCD

Induce fatty acid metabolism

Promote the tumor growth

[118]

DNA damage

piR-39,980

down

Fibrosarcoma

RRM2

Enhance apoptosis of fibrosarcoma cells induced by DOX treatment

NA

[119]

 

PIWIL4

down

Fibrosarcoma

ROS accumulation

Reduce cell growth, migration and invasion

NA

[120]

 

piR-31,470

up

Prostate cancer

GSTP1

Promote call proliferation

NA

[121]

Immune microenvironment

PIWIL4

up

HIV-1 Latency

SETDB1、HP1α/β/γ

Maintains HIV-1 latency in infected CD4 + T lymphocytes and inhibits viral replication

NA

[122]

 

PIWIL1

up

Hepatocellular carcinoma

IL10

Inhibition of immune response in the tumor microenvironment

promotes the tumor growth

[118]

 

piR-DQ551351

down

Prostate cancer

M2 macrophages polarization

NA

inhibit tumor growth

[123]

 

piR-DQ551309

up

Prostate cancer

M2 macrophages polarization

NA

inhibit tumor growth

[123]