Abstract
Objective
Energy metabolism abnormality is the hallmark in epithelial ovarian carcinoma (EOC). This study aimed to investigate energy metabolism pathway alterations and their regulation by the antiparasite drug ivermectin in EOC for the discovery of energy metabolism pathway-based molecular biomarker pattern and therapeutic targets in the context of predictive, preventive, and personalized medicine (PPPM) in EOC.
Methods
iTRAQ-based quantitative proteomics was used to identify mitochondrial differentially expressed proteins (mtDEPs) between human EOC and control mitochondrial samples isolated from 8 EOC and 11 control ovary tissues from gynecologic surgery of Chinese patients, respectively. Stable isotope labeling with amino acids in cell culture (SILAC)-based quantitative proteomics was used to analyze the protein expressions of energy metabolic pathways in EOC cells treated with and without ivermectin. Cell proliferation, cell cycle, apoptosis, and important molecules in energy metabolism pathway were examined before and after ivermectin treatment of different EOC cells.
Results
In total, 1198 mtDEPs were identified, and various mtDEPs were related to energy metabolism changes in EOC, with an interesting result that EOC tissues had enhanced abilities in oxidative phosphorylation (OXPHOS), Kreb’s cycle, and aerobic glycolysis, for ATP generation, with experiment-confirmed upregulations of UQCRH in OXPHOS; IDH2, CS, and OGDHL in Kreb’s cycle; and PKM2 in glycolysis pathways. Importantly, PDHB that links glycolysis with Kreb’s cycle was upregulated in EOC. SILAC-based quantitative proteomics found that the protein expression levels of energy metabolic pathways were regulated by ivermectin in EOC cells. Furthermore, ivermectin demonstrated its strong abilities to inhibit proliferation and cell cycle and promote apoptosis in EOC cells, through molecular networks to target PFKP in glycolysis; IDH2 and IDH3B in Kreb’s cycle; ND2, ND5, CYTB, and UQCRH in OXPHOS; and MCT1 and MCT4 in lactate shuttle to inhibit EOC growth.
Conclusions
Our findings revealed that the Warburg and reverse Warburg effects coexisted in human ovarian cancer tissues, provided the first multiomics-based molecular alteration spectrum of ovarian cancer energy metabolism pathways (aerobic glycolysis, Kreb’s cycle, oxidative phosphorylation, and lactate shuttle), and demonstrated that the antiparasite drug ivermectin effectively regulated these changed molecules in energy metabolism pathways and had strong capability to inhibit cell proliferation and cell cycle progression and promote cell apoptosis in ovarian cancer cells. The observed molecular changes in energy metabolism pathways bring benefits for an in-depth understanding of the molecular mechanisms of energy metabolism heterogeneity and the discovery of effective biomarkers for individualized patient stratification and predictive/prognostic assessment and therapeutic targets/drugs for personalized therapy of ovarian cancer patients.
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Abbreviations
- 1DGE:
-
one-dimensional gel electrophoresis
- 3P medicine:
-
predictive, preventive, and personalized medicine (PPPM)
- ABCB1:
-
ATP binding cassette subfamily B member 1
- Abcb1b:
-
ATP-binding cassette, subfamily B (MDR/TAP), member 1B
- ABCG2:
-
ATP-binding cassette subfamily G member 2
- ACO1:
-
cytoplasmic aconitate hydratase
- ADH5:
-
alcohol dehydrogenase 5 class III chi polypeptide
- Akt:
-
AKT serine/threonine kinase 1
- APC:
-
APC regulator of WNT signaling pathway
- APP:
-
amyloid beta precursor protein
- ATP:
-
adenosine triphosphate
- ATP5G1:
-
ATP synthase membrane subunit c locus 1
- ATP6:
-
ATP synthase F0 subunit 6
- ATP6V0C:
-
ATPase H+ transporting V0 subunit c
- ATP6V1D:
-
ATPase H+ transporting V1 subunit D
- AZD2281:
-
olaparib
- BRCA1:
-
BRCA1 DNA repair associated
- BRCA2:
-
BRCA2 DNA repair associated
- CA-125:
-
cancer antigen 125
- CAFs:
-
cancer-associated fibroblasts
- CCK8:
-
Cell Counting Kit-8
- CML:
-
chronic myeloid leukemia
- CoA:
-
acetyl-coenzyme A
- COX1:
-
cytochrome c oxidase subunit
- COX17:
-
cytochrome c oxidase copper chaperone COX17
- COX2:
-
cytochrome c oxidase subunit II
- COX4I1:
-
cytochrome c oxidase subunit 4I1
- COX4I2:
-
cytochrome c oxidase subunit 4I2
- COX6C:
-
cytochrome c oxidase subunit 6C
- COX7A2:
-
cytochrome c oxidase subunit 7A2
- COX7A2L:
-
cytochrome c oxidase subunit 7A2-like
- CS:
-
citrate synthase
- CYP3A4:
-
cytochrome P450 family 3 subfamily A member 4
- CYTB:
-
mitochondrially encoded cytochrome b
- DMSO:
-
dimethyl sulfoxide
- DNA:
-
deoxyribonucleic acid
- EdU:
-
5-ethynyl-2′-deoxyuridine
- EIF4A3:
-
eukaryotic translation initiation factor 4A3
- ENO1:
-
enolase 1
- EOC:
-
epithelial ovarian carcinoma
- ERK1/2:
-
mitogen-activated protein kinase 3
- ETC:
-
electron transport chain
- FACS:
-
fluorescence-activated cell sorting
- FADH2:
-
2,4-dienoyl-CoA reductase
- FDA:
-
Food and Drug Administration
- FH:
-
fumarate hydratase
- G0/G:
-
G0/G cell cycle phase
- GAPDH:
-
glyceraldehyde-3-phosphate dehydrogenase
- GLRB:
-
glycine receptor beta
- GM130:
-
golgin A2
- GO:
-
Gene Ontology
- GPI:
-
glucose-6-phosphate isomerase
- IC50:
-
the half maximal inhibitory concentration
- IDH2:
-
isocitrate dehydrogenase (NADP(+)) 2
- IDH3A:
-
isocitrate dehydrogenase [NAD] subunit alpha, mitochondrial
- IDH3B:
-
isocitrate dehydrogenase (NAD(+)) 3 noncatalytic subunit beta
- IPA:
-
Ingenuity Pathway Analysis
- iTRAQ:
-
isobaric tags for relative and absolute quantitation
- K:
-
lysine
- KEGG:
-
Kyoto Encyclopedia of Genes and Genomes
- KPNB1:
-
karyopherin subunit beta 1
- Kreb’s cycle:
-
tricarboxylic acid cycle
- LC-MS/MS:
-
liquid chromatography-tandem mass spectrometry
- LDHA:
-
lactate dehydrogenase A
- LDHB:
-
lactate dehydrogenase B
- lncRNA:
-
long noncoding RNAs
- MAPK1:
-
mitogen-activated protein kinase 1
- MAPK13:
-
mitogen-activated protein kinase 13
- MAPK3:
-
mitogen-activated protein kinase 3
- MCT1:
-
solute carrier family 16 member 1
- MCT4:
-
solute carrier family 16 member 4
- MCTs:
-
monocarboxylate transporters
- MDH2:
-
malate dehydrogenase 2
- miRNA:
-
microRNA
- M r :
-
protein molecular weight
- mRNA:
-
messenger RNA
- MRP1:
-
multidrug resistance-associated protein 1
- MRPL41:
-
mitochondrial ribosomal protein L41
- MRPL46:
-
mitochondrial ribosomal protein L41
- MRPL49:
-
mitochondrial ribosomal protein L49
- MRPL51:
-
mitochondrial ribosomal protein L51
- MRPL52:
-
mitochondrial ribosomal protein L52
- MRPL53:
-
mitochondrial ribosomal protein L53
- MRPL54:
-
mitochondrial ribosomal protein L54
- MRPL55:
-
mitochondrial ribosomal protein L55
- MRPS10:
-
mitochondrial ribosomal protein S10
- MRPS12:
-
mitochondrial ribosomal protein S12
- MRPS15:
-
mitochondrial ribosomal protein S15
- MRPS17:
-
mitochondrial ribosomal protein S17
- MRPS21:
-
mitochondrial ribosomal protein S21
- MRPS23:
-
mitochondrial ribosomal protein S23
- MRPS33:
-
mitochondrial ribosomal protein S33
- MRPS6:
-
mitochondrial ribosomal protein S6
- MRPS9:
-
mitochondrial ribosomal protein S9
- mtDEPs:
-
mitochondrial differentially expressed proteins
- mTOR:
-
mechanistic target of rapamycin kinase
- NADH:
-
mitochondrially encoded NADH dehydrogenase 1
- ND2:
-
mitochondrially encoded NADH dehydrogenase 2
- ND5:
-
mitochondrially encoded NADH dehydrogenase 5
- NFKBIA:
-
NFKB inhibitor alpha
- OGDHL:
-
oxoglutarate dehydrogenase L
- OXPHOS:
-
oxidative phosphorylation
- p21:
-
cyclin-dependent kinase inhibitor 1A
- p27:
-
cyclin-dependent kinase inhibitor 1B
- P2RX4:
-
purinergic receptor P2X 4
- P2RX7:
-
purinergic receptor P2X 7
- PAK1:
-
p21 (RAC1)-activated kinase 1
- PARP:
-
polyADP-ribose polymerase inhibitor
- PCK2:
-
phosphoenolpyruvate carboxykinase [GTP], mitochondrial
- PDC:
-
pyruvate dehydrogenase complex
- PDHB:
-
pyruvate dehydrogenase E1 subunit beta
- PFKP:
-
phosphofructokinase, platelet
- pI :
-
isoelectric point
- PKM:
-
pyruvate kinase muscle
- PKM2:
-
pyruvate kinase M2
- PPPM:
-
predictive, preventive, and personalized medicine
- PTMs:
-
posttranslational modifications
- QCR6:
-
mitochondrial cytochrome b-c1 complex subunit 6
- qRT-PCR:
-
quantitative real-time PCR
- R:
-
arginine
- Rbp:
-
SURP and G-patch domain containing 1
- RNA:
-
ribonucleic acid
- ROS:
-
reactive oxygen species
- SCX:
-
strong cation exchange chromatography
- SD:
-
standard deviation
- SDT:
-
N-hydroxysuccinimide
- SILAC:
-
stable isotope labeling with amino acids in cell culture
- SNHG3:
-
small nucleolar RNA host gene 3
- STAT3:
-
signal transducer and activator of transcription 3
- SUCLG2:
-
succinate–CoA ligase GDP-forming subunit beta
- TNF:
-
tumor necrosis factor
- TOMM20:
-
translocase of outer mitochondrial membrane 20
- UQCRH:
-
ubiquinol-cytochrome c reductase hinge protein
- VDAC1:
-
voltage-dependent anion channel 1
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Funding
The authors acknowledge the financial support from the Shandong First Medical University Talent Introduction Funds (to X.Z.) and the Hunan Provincial Hundred Talent Plan (to X.Z.).
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N.L. carried out the cell experiments, analyzed the data, prepared the figures and tables, and wrote the manuscript. H.L. collected the samples, prepared the mitochondrial samples, and participated in data analysis and table preparation. Y.W. participated in western blot experiments. L.C. collected tumor tissue samples and performed clinical diagnosis. X.Z. conceived the concept, designed the experiments and manuscript, instructed experiments and data analysis, coordinated and obtained the mitochondrial iTRAQ quantitative proteomic data, supervised the results, wrote and critically revised the manuscript, and was responsible for its financial support and the corresponding works. All authors approved the final manuscript.
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The authors declare that they have no competing interests.
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All the patients were informed about the purposes of the study and, consequently, have signed their “consent of the patient.” All investigations conformed to the principles outlined in the Declaration of Helsinki and were performed with permission by the responsible Medical Ethics Committee of Xiangya Hospital, Central South University, China.
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Abbreviations for all particular genes and proteins can be found at the following link: https://www.ncbi.nlm.nih.gov/gene/.
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Li, N., Li, H., Wang, Y. et al. Quantitative proteomics revealed energy metabolism pathway alterations in human epithelial ovarian carcinoma and their regulation by the antiparasite drug ivermectin: data interpretation in the context of 3P medicine. EPMA Journal 11, 661–694 (2020). https://doi.org/10.1007/s13167-020-00224-z
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DOI: https://doi.org/10.1007/s13167-020-00224-z
Keywords
- Epithelial ovarian carcinoma
- Ivermectin
- Mitochondrial proteomics
- Warburg effect
- Reverse Warburg effect
- iTRAQ-based quantitative proteomics
- SILAC-based quantitative proteomics
- Energy metabolism pathway
- Aerobic glycolysis
- Kreb’s cycle
- Oxidative phosphorylation
- Lactate shuttle
- Molecular biomarker pattern
- Early diagnosis
- Prognostic assessment
- Predictive preventive personalized medicine (PPPM)