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Bhushan NP, Stack T, Scott EA, Shull KR, Mathew B, Bijukumar D. In vitro assessment of varying peptide surface density on the suppression of angiogenesis by micelles displaying αvβ3 blocking peptides. J Biomed Mater Res B Appl Biomater 2023; 111:343-353. [PMID: 36054456 PMCID: PMC9771939 DOI: 10.1002/jbm.b.35154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/18/2022] [Accepted: 08/17/2022] [Indexed: 12/24/2022]
Abstract
Ligand targeted therapy (LTT) is a precision medicine strategy that can selectively target diseased cells while minimizing off-target effects on healthy cells. Integrin-targeted LTT has been developed recently for angiogenesis-related diseases. However, the clinical success is based on the optimal design of the nanoparticles for inducing receptor clustering within the cell membrane. The current study focused on determining the surface density of Ser-Asp-Val containing anti-integrin heptapeptide on poly (ethylene glycol)-b-poly(propylene sulfide) micelles (MC) required for anti-angiogenic effects on HUVECs. Varying peptide density on PEG-b-PPS/Pep-PA MCs (Pep-PA-Peptide-palmitoleic acid) was used in comparison to a random peptide (SGV) and cRGD (cyclic-Arginine-Glycine-Aspartic acid) construct at 5%-density on MCs. Immunocytochemistry using CD51/CD31 antibody was performed to study the integrin blocking by MCs. In addition, the expression of VWF and PECAM-1, cell migration and tube formation was evaluated in the presence of PEG-b-PPS/Pep-PA MCs. The results show PEG-b-PPS/SDV-PA MCs with 5%-peptide density to achieve significantly higher αvβ3 blocking compared to random peptide as well as cRGD. In addition, αvβ3 blocking via MCs further reduced the expression of vWF and PECAM-1 angiogenesis protein expression in HUVECs. Although a significant level of integrin blocking was observed for 1%-peptide density on MCs, the cell migration and tube formation were not significantly affected. In conclusion, the results of this study demonstrate that the peptide surface density on PEG-b-PPS/Pep-PA MCs has a significant impact in integrin blocking as well as inhibiting angiogenesis during LTT. The outcomes of this study provides insight into the design of ligand targeted nanocarriers for various disease conditions.
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Affiliation(s)
- Neha Phani Bhushan
- Department of Biomedical SciencesUniversity of Illinois College of Medicine at RockfordRockfordIllinoisUSA
| | - Trevor Stack
- Department of Biomedical EngineeringNorthwestern UniversityEvanstonIllinoisUSA
| | - Evan A. Scott
- Department of Biomedical EngineeringNorthwestern UniversityEvanstonIllinoisUSA
| | - Kenneth R. Shull
- Department of Biomedical EngineeringNorthwestern UniversityEvanstonIllinoisUSA
| | - Benjamin Mathew
- Department of Ophthalmology and Visual SciencesUniversity of IllinoisChicagoIllinoisUSA
| | - Divya Bijukumar
- Department of Biomedical SciencesUniversity of Illinois College of Medicine at RockfordRockfordIllinoisUSA
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Nguyen HTT, Xu Z, Shi X, Liu S, Schulte ML, White GC, Ma YQ. Paxillin binding to the PH domain of kindlin-3 in platelets is required to support integrin αIIbβ3 outside-in signaling. J Thromb Haemost 2021; 19:3126-3138. [PMID: 34411430 PMCID: PMC9080902 DOI: 10.1111/jth.15505] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 08/05/2021] [Accepted: 08/18/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND Kindlin-3 is essential for supporting the bidirectional signaling of integrin αIIbβ3 in platelets by bridging the crosstalk between integrin αIIbβ3 and the cytoplasmic signaling adaptors. OBJECTIVE In this study, we identified a previously unrecognized paxillin binding site in the pleckstrin homology (PH) domain of kindlin-3 and verified its functional significance. METHODS Structure-based approaches were employed to identify the paxillin binding site in the PH domain of kindlin-3. In addition, the bidirectional signaling of integrin αIIbβ3 were evaluated in both human and mouse platelets. RESULTS In brief, we found that a β1-β2 loop in the PH domain of kindlin-3, an important part of the canonical membrane phospholipid binding pocket, was also involved in mediating paxillin interaction. Interestingly, the binding sites of paxillin and membrane phospholipids in the PH domain of kindlin-3 were mutually exclusive. Specific disruption of paxillin binding to the PH domain by point mutations inhibited platelet spreading on immobilized fibrinogen while having no inhibition on soluble fibrinogen binding to stimulated platelets. In addition, a membrane-permeable peptide derived from the β1-β2 loop in the PH domain of kindlin-3 was capable of inhibiting platelet spreading and clot retraction, but it had no effect on soluble fibrinogen binding to platelets and platelet aggregation. Treatment with this peptide significantly reduced thrombus formation in mice. CONCLUSION Taken together, these findings suggest that interaction between paxillin and the PH domain of kindlin-3 plays an important role in supporting integrin αIIbβ3 outside-in signaling in platelets, thus providing a novel antithrombotic target.
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Affiliation(s)
| | - Zhen Xu
- Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
- Collaborative Research Program for Cell Adhesion Molecules, Shanghai University School of Life Sciences, Shanghai, China
| | - Xiaofeng Shi
- Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
- The second Affiliated Hospital of Nanjing Medical University, Nanjing, China
- The Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Shuzhen Liu
- Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
- The Affiliated Hospital of Qingdao University, Qingdao, China
| | | | - Gilbert C. White
- Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
- Department of Biochemistry, Medical College of Milwaukee, Milwaukee, Wisconsin, USA
| | - Yan-Qing Ma
- Versiti Blood Research Institute, Milwaukee, Wisconsin, USA
- Collaborative Research Program for Cell Adhesion Molecules, Shanghai University School of Life Sciences, Shanghai, China
- Department of Biochemistry, Medical College of Milwaukee, Milwaukee, Wisconsin, USA
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Cao Z, Ge S, Xu Z, Ma YQ. β3-Endonexin interacts with ninein in vascular endothelial cells to promote angiogenesis. Biochem Biophys Res Commun 2021; 566:75-79. [PMID: 34118594 DOI: 10.1016/j.bbrc.2021.06.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 06/02/2021] [Indexed: 12/01/2022]
Abstract
Anti-angiogenesis serves as an effective tumor therapy approach. In a previous study, we found that β3-endonexin expressed in vascular endothelial cells was involved in promoting proliferation and angiogenesis partially by facilitating VEGF expression. However, it still remains unclear if β3-endonexin in vascular endothelial cells also employs other mechanisms in regulating angiogenesis. In this study, we utilized a β3-endonexin mutant (M2) carrying a defective nuclear localization sequence to disrupt its nuclear localization and evaluated its ability to promote HUVEC proliferation and formation of tube-like vascular structures. In addition, we performed yeast 2-hybrid assay to identify potential functional effectors of β3-endonexin. We found that both wild type β3-endonexin and the M2 mutant could localize to centrosomes in HUVECs and both were able to promote HUVEC proliferation and formation of vascular structures. However, the M2 mutant failed to promote VEGF expression in HUVECs. Further, we found that both wild type β3-endonexin and the M2 mutant were capable of binding to ninein, a centrosomal protein with a proangiogenic effect. Knockdown of ninein in HUVECs impeded centrosome localization of wild type β3-endonexin and the M2 mutant and inhibited HUVEC proliferation and formation of vascular structures. Taken together, these findings suggest that β3-endonexin interacts with centrosome ninein and contributes to HUVEC proliferation and formation of vascular structures.
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Affiliation(s)
- Zhongyuan Cao
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China; School of Life Sciences, Shanghai University, Shanghai, China
| | - Shushu Ge
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Zhen Xu
- School of Life Sciences, Shanghai University, Shanghai, China; Versiti Blood Research Institute, Milwaukee, WI, USA
| | - Yan-Qing Ma
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China; School of Life Sciences, Shanghai University, Shanghai, China; Versiti Blood Research Institute, Milwaukee, WI, USA; Department of Biochemistry, Medical College of Milwaukee, Wisconsin, USA.
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Csizmadia G, Erdős G, Tordai H, Padányi R, Tosatto S, Dosztányi Z, Hegedűs T. The MemMoRF database for recognizing disordered protein regions interacting with cellular membranes. Nucleic Acids Res 2021; 49:D355-D360. [PMID: 33119751 PMCID: PMC7778998 DOI: 10.1093/nar/gkaa954] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 09/25/2020] [Accepted: 10/28/2020] [Indexed: 12/19/2022] Open
Abstract
Protein and lipid membrane interactions play fundamental roles in a large number of cellular processes (e.g. signalling, vesicle trafficking, or viral invasion). A growing number of examples indicate that such interactions can also rely on intrinsically disordered protein regions (IDRs), which can form specific reversible interactions not only with proteins but also with lipids. We named IDRs involved in such membrane lipid-induced disorder-to-order transition as MemMoRFs, in an analogy to IDRs exhibiting disorder-to-order transition upon interaction with protein partners termed Molecular Recognition Features (MoRFs). Currently, both the experimental detection and computational characterization of MemMoRFs are challenging, and information about these regions are scattered in the literature. To facilitate the related investigations we generated a comprehensive database of experimentally validated MemMoRFs based on manual curation of literature and structural data. To characterize the dynamics of MemMoRFs, secondary structure propensity and flexibility calculated from nuclear magnetic resonance chemical shifts were incorporated into the database. These data were supplemented by inclusion of sentences from papers, functional data and disease-related information. The MemMoRF database can be accessed via a user-friendly interface at https://memmorf.hegelab.org, potentially providing a central resource for the characterization of disordered regions in transmembrane and membrane-associated proteins.
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Affiliation(s)
- Georgina Csizmadia
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest 1094, Hungary
| | - Gábor Erdős
- MTA-ELTE Lendület Bioinformatics Research Group, Department of Biochemistry, Eötvös Loránd University, Budapest 1117, Hungary
| | - Hedvig Tordai
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest 1094, Hungary
| | - Rita Padányi
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest 1094, Hungary
| | - Silvio Tosatto
- Department of Biomedical Sciences, University of Padua, Padua 35131, Italy
| | - Zsuzsanna Dosztányi
- MTA-ELTE Lendület Bioinformatics Research Group, Department of Biochemistry, Eötvös Loránd University, Budapest 1117, Hungary
| | - Tamás Hegedűs
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest 1094, Hungary
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Understanding the role of integrins in breast cancer invasion, metastasis, angiogenesis, and drug resistance. Oncogene 2021; 40:1043-1063. [PMID: 33420366 DOI: 10.1038/s41388-020-01588-2] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 11/11/2020] [Accepted: 11/26/2020] [Indexed: 12/13/2022]
Abstract
Integrins are cell adhesion receptors, which are typically transmembrane glycoproteins that connect to the extracellular matrix (ECM). The function of integrins regulated by biochemical events within the cells. Understanding the mechanisms of cell growth by integrins is important in elucidating their effects on tumor progression. One of the major events in integrin signaling is integrin binding to extracellular ligands. Another event is distant signaling that gathers chemical signals from outside of the cell and transmit the signals upon cell adhesion to the inside of the cell. In normal breast tissue, integrins function as checkpoints to monitor effects on cell proliferation, while in cancer tissue these functions altered. The combination of tumor microenvironment and its associated components determines the cell fate. Hypoxia can increase the expression of several integrins. The exosomal integrins promote the growth of metastatic cells. Expression of certain integrins is associated with increased metastasis and decreased prognosis in cancers. In addition, integrin-binding proteins promote invasion and metastasis in breast cancer. Targeting specific integrins and integrin-binding proteins may provide new therapeutic approaches for breast cancer therapies. This review will examine the current knowledge of integrins' role in breast cancer.
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Chang HH, Cheng YC, Tsai WC, Chen Y. PSMB8 inhibition decreases tumor angiogenesis in glioblastoma through vascular endothelial growth factor A reduction. Cancer Sci 2020; 111:4142-4153. [PMID: 32816328 PMCID: PMC7648028 DOI: 10.1111/cas.14625] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 08/10/2020] [Accepted: 08/13/2020] [Indexed: 12/12/2022] Open
Abstract
Glioblastoma, also known as glioblastoma multiforme (GBM), is a fast‐growing tumor and the most aggressive brain malignancy. Proteasome subunit beta type‐8 (PSMB8) is one of the 17 essential subunits for the complete assembly of the 20S proteasome complex. The aim of the present study was to evaluate the role of PSMB8 expression in GBM progression and angiogenesis. PSMB8 expression in glioblastoma LN229 and U87MG was knocked down by siRNA or inducible shRNA both in vitro and in vivo. After PSMB8 reduction, cell survival, migration, invasion, angiogenesis, and the related signaling cascades were evaluated. An orthotopic mouse tumor model was also provided to examine the angiogenesis within tumors. A GEO profile analysis indicated that high expression of PSMB8 mRNA in GBM patients was correlated with a low survival rate. In immunohistochemistry analysis, PSMB8 expression was higher in high‐grade than in low‐grade brain tumors. The proliferation, migration, and angiogenesis of human GBM cells were decreased by PSMB8 knockdown in vitro. Furthermore, phosphorylated focal adhesion kinase (p‐FAK), p‐paxillin, MMP2, MMP9, and cathepsin B were significantly reduced in LN229 cells. Integrin β1 and β3 were reduced in HUVEC after incubation with LN229‐conditioned medium. In an orthotopic mouse tumor model, inducible knockdown of PSMB8 reduced the expression of vascular endothelial growth factor (VEGF), VEGF receptor, and CD31 as well as the progression of human glioblastoma. In this article, we demonstrated the role of PSMB8 in glioblastoma progression, especially neovascularization in vitro and in vivo. These results may provide a target for the anti–angiogenic effect of PSMB8 in glioblastoma therapy in the future.
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Affiliation(s)
- Hsin-Han Chang
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan.,Graduate Institute of Life Science, National Defense Medical Center, Taipei, Taiwan
| | - Yu-Chen Cheng
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan.,Graduate Institute of Life Science, National Defense Medical Center, Taipei, Taiwan
| | - Wen-Chiuan Tsai
- Department of Pathology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan
| | - Ying Chen
- Department of Biology and Anatomy, National Defense Medical Center, Taipei, Taiwan.,Graduate Institute of Life Science, National Defense Medical Center, Taipei, Taiwan
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Nagaraj R, Stack T, Yi S, Mathew B, Shull KR, Scott EA, Mathew MT, Bijukumar DR. High Density Display of an Anti-Angiogenic Peptide on Micelle Surfaces Enhances Their Inhibition of αvβ3 Integrin-Mediated Neovascularization In Vitro. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E581. [PMID: 32235802 PMCID: PMC7153711 DOI: 10.3390/nano10030581] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/18/2020] [Accepted: 03/19/2020] [Indexed: 02/07/2023]
Abstract
Diabetic retinopathy (DR), Retinopathy of Pre-maturity (ROP), and Age-related Macular Degeneration (AMD) are multifactorial manifestations associated with abnormal growth of blood vessels in the retina. These three diseases account for 5% of the total blindness and vision impairment in the US alone. The current treatment options involve heavily invasive techniques such as frequent intravitreal administration of anti-VEGF (vascular endothelial growth factor) antibodies, which pose serious risks of endophthalmitis, retinal detachment and a multitude of adverse effects stemming from the diverse physiological processes that involve VEGF. To overcome these limitations, this current study utilizes a micellar delivery vehicle (MC) decorated with an anti-angiogenic peptide (aANGP) that inhibits αvβ3 mediated neovascularization using primary endothelial cells (HUVEC). Stable incorporation of the peptide into the micelles (aANGP-MCs) for high valency surface display was achieved with a lipidated peptide construct. After 24 h of treatment, aANGP-MCs showed significantly higher inhibition of proliferation and migration compared to free from aANGP peptide. A tube formation assay clearly demonstrated a dose-dependent angiogenic inhibitory effect of aANGP-MCs with a maximum inhibition at 4 μg/mL, a 1000-fold lower concentration than that required for free from aANGP to display a biological effect. These results demonstrate valency-dependent enhancement in the therapeutic efficacy of a bioactive peptide following conjugation to nanoparticle surfaces and present a possible treatment alternative to anti-VEGF antibody therapy with decreased side effects and more versatile options for controlled delivery.
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Affiliation(s)
- Rajini Nagaraj
- 1601 Parkveiw Ave, Regenerative Medicine and Disability Research Lab, Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL 61107, USA
| | - Trevor Stack
- Department of Biomedical Sciences, Northwestern University, Evanston, IL 60208, USA
| | - Sijia Yi
- Department of Biomedical Sciences, Northwestern University, Evanston, IL 60208, USA
| | - Benjamin Mathew
- Department of Ophthalmology and Visual Sciences, University of Illinois Chicago, Chicago, IL 60612, USA
| | - Kenneth R Shull
- Department of Biomedical Sciences, Northwestern University, Evanston, IL 60208, USA
| | - Evan A Scott
- Department of Biomedical Sciences, Northwestern University, Evanston, IL 60208, USA
| | - Mathew T Mathew
- 1601 Parkveiw Ave, Regenerative Medicine and Disability Research Lab, Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL 61107, USA
| | - Divya Rani Bijukumar
- 1601 Parkveiw Ave, Regenerative Medicine and Disability Research Lab, Department of Biomedical Sciences, University of Illinois College of Medicine at Rockford, Rockford, IL 61107, USA
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