201
|
Aviv M, Halperin-Sternfeld M, Grigoriants I, Buzhansky L, Mironi-Harpaz I, Seliktar D, Einav S, Nevo Z, Adler-Abramovich L. Improving the Mechanical Rigidity of Hyaluronic Acid by Integration of a Supramolecular Peptide Matrix. ACS Appl Mater Interfaces 2018; 10:41883-41891. [PMID: 30211538 DOI: 10.1021/acsami.8b08423] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Hyaluronic acid (HA), a major component of the extracellular matrix, is an attractive material for various medical applications. Yet, its low mechanical rigidity and fast in vivo degradation hinder its utilization. Here, we demonstrate the reinforcement of HA by its integration with a low-molecular-weight peptide hydrogelator to produce a composite hydrogel. The formulation of HA with the fluorenylmethoxycarbonyl diphenylalanine (FmocFF) peptide, one of the most studied self-assembling hydrogel-forming building blocks, showing notable mechanical properties, resulted in the formation of stable, homogeneous hydrogels. Electron microscopy analysis demonstrated a uniform distribution of the two matrices in the composite forms. The composite hydrogels showed improved mechanical properties and stability to enzymatic degradation while maintaining their biocompatibility. Moreover, the storage modulus of the FmocFF/HA composite hydrogels reached up to 25 kPa. The composite hydrogels allowed sustained release of curcumin, a hydrophobic polyphenol showing antioxidant, anti-inflammatory, and antitumor activities. Importantly, the rate of curcumin release was modulated as a function of the concentration of the FmocFF peptide within the hydrogel matrix. This work provides a new approach for conferring mechanical rigidity and stability to HA without the need of cross-linking, thus potentially facilitating its utilization in different clinical applications, such as sustained drug release.
Collapse
Affiliation(s)
- Moran Aviv
- School of Mechanical Engineering , Afeka Tel Aviv Academic College of Engineering , Tel Aviv 6910717 , Israel
| | | | | | | | - Iris Mironi-Harpaz
- Faculty of Biomedical Engineering , Technion-Israel Institute of Technology , Haifa 3200003 , Israel
| | - Dror Seliktar
- Faculty of Biomedical Engineering , Technion-Israel Institute of Technology , Haifa 3200003 , Israel
| | | | | | | |
Collapse
|
202
|
Lunder M, Vodnik M, Kubale V, Grgurevič N, Majdič G, Štrukelj B. Peptide mimetic of N-terminal ghrelin enhances ghrelin-induced growth hormone secretion and c-Fos expression in mice. J Neuroendocrinol 2018; 30:e12656. [PMID: 30394584 DOI: 10.1111/jne.12656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 10/12/2018] [Accepted: 10/31/2018] [Indexed: 11/30/2022]
Abstract
Orexigenic peptide ghrelin and its receptor have been extensively investigated as potential therapeutic targets, primarily because of their role in feeding initiation and growth hormone (GH) release. However, no specific ghrelin targeting anti-obesity or cachexia therapeutics are available for clinical use thus far and further efforts in this direction are warranted. The present study aimed to find new peptide drug leads modulating ghrelin signal transduction. By targeting neutralising antibodies against ghrelin with phage display libraries, we aimed to identify peptides binding to the cognate receptor. Four synthetic peptides were selected and tested using calcium screening assays. The most effective competitive antagonist FSFLPPE was further tested in vivo. Administration of the peptide produced no significant effect on either food intake or GH release. Surprisingly, when co-administered with ghrelin, the peptide significantly enhanced GH secretion and c-Fos expression. The evidence obtained in the present study indicates that FSFLPPE might act as an ago-allosteric modulator.
Collapse
Affiliation(s)
- Mojca Lunder
- Chair of Pharmaceutical Biology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Miha Vodnik
- Chair of Pharmaceutical Biology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| | - Valentina Kubale
- Institute of Preclinical Sciences, Veterinary Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Neža Grgurevič
- Institute of Preclinical Sciences, Veterinary Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Gregor Majdič
- Institute of Preclinical Sciences, Veterinary Faculty, University of Ljubljana, Ljubljana, Slovenia
| | - Borut Štrukelj
- Chair of Pharmaceutical Biology, Faculty of Pharmacy, University of Ljubljana, Ljubljana, Slovenia
| |
Collapse
|
203
|
Babych M, Bertheau-Mailhot G, Zottig X, Dion J, Gauthier L, Archambault D, Bourgault S. Engineering and evaluation of amyloid assemblies as a nanovaccine against the Chikungunya virus. Nanoscale 2018; 10:19547-19556. [PMID: 30324958 DOI: 10.1039/c8nr05948a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The design of nanoparticles exposing a high density of antigens constitutes a promising strategy to address safety concerns of conventional life-attenuated vaccines as well as to increase the immunogenicity of subunit vaccines. In this study, we developed a fully synthetic nanovaccine based on an amyloid peptide sequence with high self-assembling properties. The immunogenic epitope E2EP3 from the E2 glycoprotein of the Chikungunya virus was used to evaluate the potential of a 10-mer peptide derived from an endogenous amyloidogenic polypeptide as a novel vaccine platform. Chimeric peptides, comprising the peptide antigen attached to the amyloid core by a short flexible linker, were prepared by solid phase synthesis. As observed using atomic force microscopy, these polypeptides self-assembled into linear and unbranched fibrils with a diameter ranging from 6 to 8 nm. A quaternary conformation rich in cross-β-sheets characterized these assemblies, as demonstrated by circular dichroism spectroscopy and thioflavin T fluorescence. ELISA assays and transmission electronic microscopy of immunogold labeled-fibrils revealed a high density of the Chikungunya virus E2 glycoprotein derived epitope exposed on the fibril surface. These amyloid fibrils were cytocompatible and were efficiently uptaken by macrophages. Mice immunization revealed a robust IgG response against the E2EP3 epitope, which was dependent on self-assembly and did not require co-injection of the Alhydrogel adjuvant. These results indicate that cross-β-sheet amyloid assemblies constitute suitable synthetic self-adjuvanted assemblies to anchor antigenic determinants and to increase the immunogenicity of peptide epitopes.
Collapse
Affiliation(s)
- Margaryta Babych
- Department of Chemistry, Université du Québec à Montréal, Montréal, QC, Canada.
| | | | | | | | | | | | | |
Collapse
|
204
|
Yang J, Xu J, Gonzalez R, Lindner T, Kratochwil C, Miao Y. 68Ga-DOTA-GGNle-CycMSH hex targets the melanocortin-1 receptor for melanoma imaging. Sci Transl Med 2018; 10:eaau4445. [PMID: 30404861 PMCID: PMC6383514 DOI: 10.1126/scitranslmed.aau4445] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 10/15/2018] [Indexed: 12/18/2022]
Abstract
Melanocortin-1 receptor (MC1R) is a molecular target for melanoma imaging and therapy because of its overexpression on rodent and human melanoma cells. Here, we evaluated the MC1R targeting and specificity of 68Ga-DOTA-GGNle-CycMSHhex and Cy5.5-GGNle-CycMSHhex using murine and human melanoma cells, and murine and xenografted tumors. 68Ga-DOTA-GGNle-CycMSHhex was used first in human as an imaging probe to evaluate the possibility of radionuclide therapy in patients with advanced-stage melanoma. 68Ga-DOTA-GGNle-CycMSHhex and Cy5.5-GGNle-CycMSHhex displayed MC1R-specific targeting properties in murine and human melanoma cells, as well as in murine melanoma and human melanoma-xenografted tumors. Both B16/F10 and M21 melanoma lesions could be easily imaged by positron emission tomography using 68Ga-DOTA-GGNle-CycMSHhex The first-in-human images of melanoma brain metastases in patients demonstrated the clinical relevance of MC1R as a molecular target for melanoma imaging, highlighting the potential of 68Ga-DOTA-GGNle-CycMSHhex as an MC1R-targeting melanoma imaging probe and underscoring the need to develop MC1R-targeting therapeutic agents for treating patients with metastatic melanoma.
Collapse
Affiliation(s)
- Jianquan Yang
- Department of Radiology, University of Colorado Denver, Aurora, CO 80045, USA
| | - Jingli Xu
- Department of Radiology, University of Colorado Denver, Aurora, CO 80045, USA
| | - Rene Gonzalez
- Department of Medical Oncology, University of Colorado Denver, Aurora, CO 80045, USA
| | - Thomas Lindner
- Department of Nuclear Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany
| | - Clemens Kratochwil
- Department of Nuclear Medicine, University Hospital Heidelberg, 69120 Heidelberg, Germany.
| | - Yubin Miao
- Department of Radiology, University of Colorado Denver, Aurora, CO 80045, USA.
| |
Collapse
|
205
|
Sun Z, Zhang Y, Cao D, Wang X, Yan X, Li H, Huang L, Qu X, Kong C, Qin H, Wang M, Xu W, Liang L. PD-1/PD-L1 pathway and angiogenesis dual recognizable nanoparticles for enhancing chemotherapy of malignant cancer. Drug Deliv 2018; 25:1746-1755. [PMID: 30394118 PMCID: PMC6225483 DOI: 10.1080/10717544.2018.1509907] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 07/03/2018] [Accepted: 08/06/2018] [Indexed: 12/14/2022] Open
Abstract
Although the cancer immunotherapy represents one of the most promising strategies for cancer treatment, the PD-1/PD-L1 pathway, which involves a receptor-ligand interaction, can induced immunosuppression by disabling tumor-infiltrating lymphocytes (TILs). In the present study, we coupled a PD-L1 (Programmed cell death 1 ligand 1) recognizable peptide DPPA-1 to the sequence of CGKRK, a namely tumor vasculature affinity peptide, to form a new molecule CD peptide. Thereafter, the paclitaxel (PTX)-loaded PCL nanoparticles were developed and modified with the above newly synthesized CD molecules for tumor cells and angiogenesis dual targeting drug delivery. Results of cellular experiments showed that the prepared nanoparticles have a high affinity to both tumor vasculature endothelial cells and tumor cells, which leads to an improved cytotoxicity to cancer cells and inhibition for angiogenesis. In addition, results of in vivo imaging assay exhibited a super tumor targeting efficacy for the CD peptide decorated nanoplatforms. Finally, the pharmacodynamic evaluation was performed and results shown that the tumor-bearing mice treated with CD-NP-PTX achieved the longest medium survival time when compared with others. Simultaneously, different nanoparticles un-loaded with drugs were also subjected to anti-tumor effect studies. Results demonstrated that the mice administrated with D-NP displayed a significantly higher ability of tumor growth inhibition when compared with the NP or C-NP, indicating a super blocking effect of PD-1/PD-L1 pathway for the DPPA-1 peptide. Collectively, these results indicated that the fabricated CD-NP-PTX holds great potential in improving the tumor-targeting drug delivery efficacy and anti-glioma effect.
Collapse
Affiliation(s)
- Zhenliang Sun
- Department of General Surgery, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
- Shanghai University of Medicine and Health Sciences Affiliated Sixth People’s Hospital South Campus, Shanghai, China
| | - Yang Zhang
- Department of Pharmacy, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Duo Cao
- The College of Life Sciences, Northwest University, Xi’an, China
| | - Xufeng Wang
- Haiwan Community Health Center, Shanghai, China
| | - Xuebing Yan
- Department of General Surgery, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hao Li
- Department of General Surgery, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Linsheng Huang
- Department of General Surgery, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xiao Qu
- Department of General Surgery, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Cheng Kong
- Department of General Surgery, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Huanglong Qin
- Department of General Surgery, Shanghai Tenth People’s Hospital, Tongji University School of Medicine, Shanghai, China
| | - Man Wang
- Shanghai University of Medicine and Health Sciences Affiliated Sixth People’s Hospital South Campus, Shanghai, China
| | - Wei Xu
- Department of Orthopaedic, Tong Ren Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Lin Liang
- Shanghai University of Medicine and Health Sciences Affiliated Sixth People’s Hospital South Campus, Shanghai, China
| |
Collapse
|
206
|
Pant A, Kumar R, Wani NA, Verma S, Sharma R, Pande V, Saxena AK, Dixit R, Rai R, Pandey KC. Allosteric Site Inhibitor Disrupting Auto-Processing of Malarial Cysteine Proteases. Sci Rep 2018; 8:16193. [PMID: 30385827 PMCID: PMC6212536 DOI: 10.1038/s41598-018-34564-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 10/16/2018] [Indexed: 02/08/2023] Open
Abstract
Falcipains are major haemoglobinases of Plasmodium falciparum required for parasite growth and development. They consist of pro- and mature domains that interact via 'hot-spot' interactions and maintain the structural integrity of enzyme in zymogen state. Upon sensing the acidic environment, these interactions dissociate and active enzyme is released. For inhibiting falcipains, several active site inhibitors exist, however, compounds that target via allosteric mechanism remains uncharacterized. Therefore, we designed and synthesized six azapeptide compounds, among which, NA-01 & NA-03 arrested parasite growth by specifically blocking the auto-processing of falcipains. Inhibitors showed high affinity for enzymes in presence of the prodomain without affecting the secondary structure. Binding of NA-03 at the interface induced rigidity in the prodomain preventing structural reorganization. We further reported a histidine-dependent activation of falcipain. Collectively, for the first time we provide a framework for blocking the allosteric site of crucial haemoglobinases of the human malaria parasite. Targeting the allosteric site could provide high selectivity and less vulnerable to drug resistance.
Collapse
Affiliation(s)
- A Pant
- ICMR-National Institute of Malaria Research, Dwarka Sector 8, New Delhi, India
- Department of Biotechnology, Kumaun University, Nainital, Uttarakhand, India
| | - R Kumar
- Integrated Science Lab, Umeå University, Umeå, Sweden
| | - N A Wani
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - S Verma
- ICMR-National Institute of Malaria Research, Dwarka Sector 8, New Delhi, India
- Department of Biotechnology, Kumaun University, Nainital, Uttarakhand, India
| | - R Sharma
- School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - V Pande
- Department of Biotechnology, Kumaun University, Nainital, Uttarakhand, India
| | - A K Saxena
- School of Life Sciences, Jawaharlal Nehru University, New Delhi, India
| | - R Dixit
- ICMR-National Institute of Malaria Research, Dwarka Sector 8, New Delhi, India
| | - R Rai
- Medicinal Chemistry Division, CSIR-Indian Institute of Integrative Medicine, Jammu, India
| | - K C Pandey
- ICMR-National Institute of Malaria Research, Dwarka Sector 8, New Delhi, India.
- Department of Biochemistry, ICMR-National Institute for Research in Environmental Health, Bhopal, MP - 462001, India.
| |
Collapse
|
207
|
Liu HY, Nguyen HD, Lin CC. Dynamic PEG-Peptide Hydrogels via Visible Light and FMN-Induced Tyrosine Dimerization. Adv Healthc Mater 2018; 7:e1800954. [PMID: 30369100 DOI: 10.1002/adhm.201800954] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 10/01/2018] [Indexed: 02/03/2023]
Abstract
Photoresponsive hydrogels have become invaluable 3D culture matrices for mimicking aspects of the extracellular matrix. Recent efforts have focused on using ultraviolet (UV) light exposure and multifunctional macromers to induce secondary hydrogel crosslinking and dynamic matrix stiffening in the presence of cells. This contribution reports the design of a novel yet simple dynamic poly(ethylene glycol)-peptide hydrogel system through flavin mononucleotide (FMN) induced di-tyrosine crosslinking. These di-tyrosine linkages effectively increase hydrogel crosslinking density and elastic modulus. In addition, the degree of stiffening in hydrogels at a fixed PEG macromer content can be readily tuned by controlling FMN concentration or the number of tyrosine residues built-in to the peptide linker. Furthermore, tyrosine-bearing pendant biochemical motifs can be spatial-temporally patterned in the hydrogel network via controlling light exposure through a photomask. The visible light and FMN-induced tyrosine dimerization process produces a cytocompatible and physiologically relevant degree of stiffening, as shown by changes of cell morphology and gene expression in pancreatic cancer and stromal cells. This new dynamic hydrogel scheme should be highly desirable for researchers seeking a photoresponsive hydrogel system without complicated chemical synthesis and secondary UV light irradiation.
Collapse
Affiliation(s)
- Hung-Yi Liu
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
| | - Han D Nguyen
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202, USA
| | - Chien-Chi Lin
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202, USA
| |
Collapse
|
208
|
Liu W, Boldt F, Tokura Y, Wang T, Agrawalla BK, Wu Y, Weil T. Encoding function into polypeptide-oligonucleotide precision biopolymers. Chem Commun (Camb) 2018; 54:11797-11800. [PMID: 30280162 PMCID: PMC6192144 DOI: 10.1039/c8cc04725a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 09/21/2018] [Indexed: 11/21/2022]
Abstract
We report a novel synthesis strategy to prepare precision polymers providing exact chain lengths, molecular weights and monomer sequences that allow post modifications by convenient DNA hybridization. Two grafted single strand DNA (ssDNA) side chains serve as a versatile platform for sequence-specific attachment of chromophores, proteins, cell-targeting peptide, and a Y-shape DNA linker. This approach resembles a LEGO®-type incorporation of functionalities to create functional biopolymers of high structure definition under mild conditions.
Collapse
Affiliation(s)
- Weina Liu
- Max-Planck-Institute for Polymer Research
,
Ackermannweg 10
, 55128 Mainz
, Germany
.
- Department of Inorganic Chemistry I
, Ulm University
,
Albert-Einstein-Allee 11
, 89081 Ulm
, Germany
| | - Felix Boldt
- Max-Planck-Institute for Polymer Research
,
Ackermannweg 10
, 55128 Mainz
, Germany
.
- Department of Inorganic Chemistry I
, Ulm University
,
Albert-Einstein-Allee 11
, 89081 Ulm
, Germany
| | - Yu Tokura
- Max-Planck-Institute for Polymer Research
,
Ackermannweg 10
, 55128 Mainz
, Germany
.
- Department of Inorganic Chemistry I
, Ulm University
,
Albert-Einstein-Allee 11
, 89081 Ulm
, Germany
| | - Tao Wang
- Department of Inorganic Chemistry I
, Ulm University
,
Albert-Einstein-Allee 11
, 89081 Ulm
, Germany
- School of Materials Science and Engineering
, Southwest Jiaotong University
,
610031
, Chengdu
, China
| | - Bikram Keshari Agrawalla
- Max-Planck-Institute for Polymer Research
,
Ackermannweg 10
, 55128 Mainz
, Germany
.
- Department of Inorganic Chemistry I
, Ulm University
,
Albert-Einstein-Allee 11
, 89081 Ulm
, Germany
| | - Yuzhou Wu
- Max-Planck-Institute for Polymer Research
,
Ackermannweg 10
, 55128 Mainz
, Germany
.
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica
, School of Chemistry and Chemical Engineering
, Huazhong University of Science and Technology
,
Luoyu Road 1037
, 430074 Hongshan
, Wuhan
, P. R. China
.
| | - Tanja Weil
- Max-Planck-Institute for Polymer Research
,
Ackermannweg 10
, 55128 Mainz
, Germany
.
- Department of Inorganic Chemistry I
, Ulm University
,
Albert-Einstein-Allee 11
, 89081 Ulm
, Germany
| |
Collapse
|
209
|
Paranjapye N, Daggett V. De Novo Designed α-Sheet Peptides Inhibit Functional Amyloid Formation of Streptococcus mutans Biofilms. J Mol Biol 2018; 430:3764-3773. [PMID: 30006266 PMCID: PMC6168415 DOI: 10.1016/j.jmb.2018.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 06/29/2018] [Accepted: 07/02/2018] [Indexed: 12/11/2022]
Abstract
Streptococcus mutans is a bacterial species that predominates in the oral microbiome. S. mutans binds to the tooth surface, metabolizes sugars and produces acid, leading to cavity formation. S. mutans can also cause infectious endocarditis. Recent evidence suggests that S. mutans biofilms contain amyloid fibrils. Amyloids are insoluble fibrillar protein aggregates, and bacteria use functional amyloids to improve robustness of their biofilms. While the functional amyloids in bacteria such as Escherichia coli and Staphylococcus aureus have been heavily investigated, little is known about the mechanism of S. mutans amyloid formation. Previous results from our laboratory with the amyloidogenic proteins and peptides from the aforementioned bacteria and other mammalian amyloid systems suggest that amyloid formation progresses via an intermediate that adopts a unique secondary structure-α-sheet. De novo designed peptides with alternating l- and d-amino acid also adopt an α-sheet secondary structure and inhibit amyloid formation by binding to soluble oligomeric species during amyloidogenesis. Inhibition of fibrillization by α-sheet peptides suggests the presence of α-sheet during amyloid formation. To investigate the mechanism of functional amyloid formation in S. mutans, α-sheet peptides were compared to epigallocatechin gallate for their ability to inhibit fibril formation in S. mutans. Inhibition was demonstrated in a biofilm plate assay and on hydroxyapatite surfaces both in S. mutans alone and in bacteria from human saliva. The observed inhibition suggests that an α-sheet mediated mechanism may be operative during functional amyloid formation.
Collapse
Affiliation(s)
- Natasha Paranjapye
- Department of Bioengineering, University of Washington, Box 355013, Seattle, WA 98195-5013, USA
| | - Valerie Daggett
- Department of Bioengineering, University of Washington, Box 355013, Seattle, WA 98195-5013, USA.
| |
Collapse
|
210
|
Siepi M, Oliva R, Petraccone L, Del Vecchio P, Ricca E, Isticato R, Lanzilli M, Maglio O, Lombardi A, Leone L, Notomista E, Donadio G. Fluorescent peptide dH3w: A sensor for environmental monitoring of mercury (II). PLoS One 2018; 13:e0204164. [PMID: 30303991 PMCID: PMC6179210 DOI: 10.1371/journal.pone.0204164] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 09/03/2018] [Indexed: 01/06/2023] Open
Abstract
Heavy metals are hazardous environmental contaminants, often highly toxic even at extremely low concentrations. Monitoring their presence in environmental samples is an important but complex task that has attracted the attention of many research groups. We have previously developed a fluorescent peptidyl sensor, dH3w, for monitoring Zn2+ in living cells. This probe, designed on the base on the internal repeats of the human histidine rich glycoprotein, shows a turn on response to Zn2+ and a turn off response to Cu2+. Other heavy metals (Mn2+, Fe2+, Ni2+, Co2+, Pb2+ and Cd2+) do not interfere with the detection of Zn2+ and Cu2+. Here we report that dH3w has an affinity for Hg2+ considerably higher than that for Zn2+ or Cu2+, therefore the strong fluorescence of the Zn2+/dH3w complex is quenched when it is exposed to aqueous solutions of Hg2+, allowing the detection of sub-micromolar levels of Hg2+. Fluorescence of the Zn2+/dH3w complex is also quenched by Cu2+ whereas other heavy metals (Mn2+, Fe2+, Ni2+, Co2+, Cd2+, Pb2+, Sn2+ and Cr3+) have no effect. The high affinity and selectivity suggest that dH3w and the Zn2+/dH3w complex are suited as fluorescent sensor for the detection of Hg2+ and Cu2+ in environmental as well as biological samples.
Collapse
Affiliation(s)
- Marialuisa Siepi
- Department of Biology University of Naples Federico II, Naples, Italy
| | - Rosario Oliva
- Department of Chemical Sciences University of Naples Federico II, Naples, Italy
| | - Luigi Petraccone
- Department of Chemical Sciences University of Naples Federico II, Naples, Italy
| | - Pompea Del Vecchio
- Department of Chemical Sciences University of Naples Federico II, Naples, Italy
| | - Ezio Ricca
- Department of Biology University of Naples Federico II, Naples, Italy
| | - Rachele Isticato
- Department of Biology University of Naples Federico II, Naples, Italy
| | | | - Ornella Maglio
- Department of Chemical Sciences University of Naples Federico II, Naples, Italy
- IBB, CNR, Naples, Italy
| | - Angela Lombardi
- Department of Chemical Sciences University of Naples Federico II, Naples, Italy
| | - Linda Leone
- Department of Chemical Sciences University of Naples Federico II, Naples, Italy
| | - Eugenio Notomista
- Department of Biology University of Naples Federico II, Naples, Italy
| | - Giuliana Donadio
- Department of Biology University of Naples Federico II, Naples, Italy
| |
Collapse
|
211
|
Patutina OA, Bazhenov MA, Miroshnichenko SK, Mironova NL, Pyshnyi DV, Vlassov VV, Zenkova MA. Peptide-oligonucleotide conjugates exhibiting pyrimidine-X cleavage specificity efficiently silence miRNA target acting synergistically with RNase H. Sci Rep 2018; 8:14990. [PMID: 30302012 PMCID: PMC6177439 DOI: 10.1038/s41598-018-33331-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 09/21/2018] [Indexed: 12/13/2022] Open
Abstract
Taking into account the important role of miRNA in carcinogenesis, oncogenic miRNAs are attractive molecules for gene-targeted therapy. Here, we developed a novel series of peptide-oligonucleotide conjugates exhibiting ribonuclease activity targeted to highly oncogenic miRNAs miR-21 and miR-17. When designing the conjugates, we enhanced both nuclease resistance of the targeted oligodeoxyribonucleotide by introducing at its 3'-end mini-hairpin structure displaying high thermostability and robustness against nuclease digestion and the efficiency of its functioning by attachment of the catalytic construction (amide)NH2-Gly(ArgLeu)4-TCAA displaying ribonuclease activity to its 5'-end. Designed miRNases efficiently cleaved miRNA targets, exhibiting Pyr-X specificity, and cleavage specificity had strong dependence on the miRNA sequence in the site of peptide location. In vitro, designed miRNases do not prevent cleavage of miRNA bound with the conjugate by RNase H, and more than an 11-fold enhancement of miRNA cleavage by the conjugate is observed in the presence of RNase H. In murine melanoma cells, miRNase silences mmu-miR-17 with very high efficiency as a result of miR-17 cleavage by miRNase and by recruited RNase H. Thus, miRNases provide a system of double attack of the miRNA molecules, significantly increasing the efficiency of miRNA downregulation in the cells in comparison with antisense oligonucleotide.
Collapse
Affiliation(s)
- O A Patutina
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev ave., 8, Novosibirsk, 630090, Russia
| | - M A Bazhenov
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev ave., 8, Novosibirsk, 630090, Russia
| | - S K Miroshnichenko
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev ave., 8, Novosibirsk, 630090, Russia
| | - N L Mironova
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev ave., 8, Novosibirsk, 630090, Russia
| | - D V Pyshnyi
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev ave., 8, Novosibirsk, 630090, Russia
| | - V V Vlassov
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev ave., 8, Novosibirsk, 630090, Russia
| | - M A Zenkova
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Lavrentiev ave., 8, Novosibirsk, 630090, Russia.
| |
Collapse
|
212
|
Li C, Huang F, Liu Y, Lv J, Wu G, Liu Y, Ma R, An Y, Shi L. Nitrilotriacetic Acid-Functionalized Glucose-Responsive Complex Micelles for the Efficient Encapsulation and Self-Regulated Release of Insulin. Langmuir 2018; 34:12116-12125. [PMID: 30212220 DOI: 10.1021/acs.langmuir.8b02574] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Insulin plays a significant role in diabetes treatment. Although a huge number of insulin-loaded, glucose-responsive nanocarriers have been developed in past decades, most of them showed a lower loading capacity and efficiency due to the weak interaction between insulin and nanocarriers. In this work, a novel insulin-encapsulated glucose-responsive polymeric complex micelle (CM) is devised, showing (i) enhanced insulin-loading efficiency owing to the zinc ions' chelation by nitrilotriacetic acid (NTA) groups of NTA-functioned glycopolymer and the histidine imidazole of insulin, (ii) the glucose-triggered pulse release of insulin, and (iii) long stability under physiological conditions. This CM was fabricated by the self-assembly of block copolymer PEG- b-P(Asp- co-AspPBA) and glycopolymer P(Asp- co-AspGA- co-AspNTA), resulting in complex micelles with a PEG shell and a cross-linked core composed of phenylboronic acid (PBA)/glucose complexations. Notably, the modified nitrilotriacetic acid (NTA) groups of CM could specifically bind insulin via chelated zinc ions, thus enhancing the loading efficacy of insulin compared to that of nonmodified CM. The dynamic PBA/glucose complexation core of CM dissociates under the trigger of high glucose concentration (>2 g/L) while being quite stable in low glucose concentrations (<2 g/L), as demonstrated by the pulse release of insulin in vitro. Finally, in a murine model of type 1 diabetes, NTA-modified complex micelles loading an insulin (NTA-CM-INS) group exhibited a long hypoglycemic effect which is superior to that of free insulin in the PBS (PBS-INS) group and insulin-loaded complex micelles without an NTA modification (CM-INS) group. This long-term effect benefited from Zn(II) chelation by NTA-modified complex micelles and could avoid hypoglycemia caused by the burst release of insulin. Taken together, this constitutes a highly effective way to encapsulate insulin and release insulin via an on-demand manner for blood glucose control in diabetes.
Collapse
Affiliation(s)
| | - Fan Huang
- Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine , Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin 300192 , China
| | | | | | | | | | | | | | | |
Collapse
|
213
|
Feng S, Chang S, Yan L, Dong H, Xu X, Wang C, Liang Y, Liu K. Design, synthesis, and activity evaluation of novel erythropoietin mimetic peptides. Bioorg Med Chem Lett 2018; 28:3038-3041. [PMID: 30097369 DOI: 10.1016/j.bmcl.2018.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 07/27/2018] [Accepted: 08/01/2018] [Indexed: 11/19/2022]
Abstract
The approval of the erythropoietin (EPO) mimetic peptide drug peginesatide in 2012 was a breakthrough for the treatment of secondary anemia. However, due to severe allergic reactions, peginesatide was recalled a year later. In this study, 12 novel peptides were designed and synthesized by substituting specific amino acids of the monomeric peptide in peginesatide, with the aim of obtaining new EPO mimetic peptides with higher activities and lower side effects than the parent compound. Their cell proliferation activities were evaluated, and the structure-activity relationships were analyzed. Five compounds had equal cell proliferation activity to the control peptide. Among them, one compound showed a higher in vivo activity than the control peptide, with no obvious side effects.
Collapse
Affiliation(s)
- Siliang Feng
- Beijing Institute of Pharmacology and Toxicology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing 100850, China
| | - Shaohua Chang
- Beijing Prowincan Pharmaceutical Technology Co. Ltd., Beijing 102600, China
| | - Lingdi Yan
- Beijing Institute of Pharmacology and Toxicology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing 100850, China
| | - Huajin Dong
- Beijing Institute of Pharmacology and Toxicology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing 100850, China
| | - Xiaoyu Xu
- Beijing Prowincan Pharmaceutical Technology Co. Ltd., Beijing 102600, China
| | - Chenhong Wang
- Beijing Institute of Pharmacology and Toxicology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing 100850, China
| | - Yuanjun Liang
- Beijing Prowincan Pharmaceutical Technology Co. Ltd., Beijing 102600, China.
| | - Keliang Liu
- Beijing Institute of Pharmacology and Toxicology, State Key Laboratory of Toxicology and Medical Countermeasures, Beijing 100850, China.
| |
Collapse
|
214
|
Amit M, Yuran S, Gazit E, Reches M, Ashkenasy N. Tailor-Made Functional Peptide Self-Assembling Nanostructures. Adv Mater 2018; 30:e1707083. [PMID: 29989255 DOI: 10.1002/adma.201707083] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 04/05/2018] [Indexed: 05/08/2023]
Abstract
Noncovalent interactions are the main driving force in the folding of proteins into a 3D functional structure. Motivated by the wish to reveal the mechanisms of the associated self-assembly processes, scientists are focusing on studying self-assembly processes of short protein segments (peptides). While this research has led to major advances in the understanding of biological and pathological process, only in recent years has the applicative potential of the resulting self-assembled peptide assemblies started to be explored. Here, major advances in the development of biomimetic supramolecular peptide assemblies as coatings, gels, and as electroactive materials, are highlighted. The guiding lines for the design of helical peptides, β strand peptides, as well as surface binding monolayer-forming peptides that can be utilized for a specific function are highlighted. Examples of their applications in diverse immerging applications in, e.g., ecology, biomedicine, and electronics, are described. Taking into account that, in addition to extraordinary design flexibility, these materials are naturally biocompatible and ecologically friendly, and their production is cost effective, the emergence of devices incorporating these biomimetic materials in the market is envisioned in the near future.
Collapse
Affiliation(s)
- Moran Amit
- Department of Materials Engineering, Ben Gurion University of the Negev, Beer-Sheva, 84105, Israel
- Department of Electrical and Computer Engineering, UC San Diego, La Jolla, CA, 92093-0407, USA
| | - Sivan Yuran
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Ehud Gazit
- Department of Molecular Microbiology and Biotechnology, Department of Materials Science and Engineering, Tel Aviv University, Tel Aviv, 69978, Israel
| | - Meital Reches
- Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Nurit Ashkenasy
- Department of Materials Engineering, Ben Gurion University of the Negev, Beer-Sheva, 84105, Israel
| |
Collapse
|
215
|
Hirani Z, Taylor HF, Babcock EF, Bockus AT, Varnado CD, Bielawski CW, Urbach AR. Molecular Recognition of Methionine-Terminated Peptides by Cucurbit[8]uril. J Am Chem Soc 2018; 140:12263-12269. [PMID: 30221936 PMCID: PMC6312855 DOI: 10.1021/jacs.8b07865] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This Article describes the molecular recognition of peptides containing an N-terminal methionine (Met) by the synthetic receptor cucurbit[8]uril (Q8) in aqueous solution and with submicromolar affinity. Prior work established that Q8 binds with high affinity to peptides containing aromatic amino acids, either by simultaneous binding of two aromatic residues, one from each of two different peptides, or by simultaneous binding of an aromatic residue and its immediate neighbor on the same peptide. The additional binding interface of two neighboring residues suggested the possibility of targeting nonaromatic peptides, which have thus far bound only weakly to synthetic receptors. A peptide library designed to test this hypothesis was synthesized and screened qualitatively for Q8 binding using a fluorescent indicator displacement assay. The large fluorescence response observed for several Met-terminated peptides suggested strong binding, which was confirmed quantitatively by the determination of submicromolar equilibrium dissociation constant values for Q8 binding to MLA, MYA, and MFA using isothermal titration calorimetry (ITC). This discovery of high affinity binding to Met-terminated peptides and, more generally, to nonaromatic peptides prompted a detailed investigation of the determinants of binding in this system using ITC, electrospray ionization mass spectrometry, and 1H NMR spectroscopy for 25 purified peptides. The studies establish the sequence determinants required for high-affinity binding of Met-terminated peptides and demonstrate that cucurbit[ n]uril-mediated peptide recognition does not require an aromatic residue for high affinity. These results, combined with the known ability of cucurbit[ n]urils to target N-termini and disordered loops in folded proteins, suggest that Q8 could be used to target unmodified, Met-terminated proteins.
Collapse
Affiliation(s)
- Zoheb Hirani
- Department of Chemistry, Trinity University, 1 Trinity Place, San Antonio, Texas 78212, United States
| | - Hailey F. Taylor
- Department of Chemistry, Trinity University, 1 Trinity Place, San Antonio, Texas 78212, United States
| | - Emily F. Babcock
- Department of Chemistry, Trinity University, 1 Trinity Place, San Antonio, Texas 78212, United States
| | - Andrew T. Bockus
- Department of Chemistry, Trinity University, 1 Trinity Place, San Antonio, Texas 78212, United States
| | - C. Daniel Varnado
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Christopher W. Bielawski
- Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), 50 UNIST-gil, Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
- Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Adam R. Urbach
- Department of Chemistry, Trinity University, 1 Trinity Place, San Antonio, Texas 78212, United States
| |
Collapse
|
216
|
Alvares DS, Viegas TG, Ruggiero Neto J. The effect of pH on the lytic activity of a synthetic mastoparan-like peptide in anionic model membranes. Chem Phys Lipids 2018; 216:54-64. [PMID: 30253128 DOI: 10.1016/j.chemphyslip.2018.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 08/20/2018] [Accepted: 09/11/2018] [Indexed: 12/28/2022]
Abstract
Peptide sequences containing acidic and basic residues could potentially have their net charges modulated by bulk pH with a possible influence on their lytic activity in lipid vesicles. The present study reports on a biophysical investigation of these modulatory effects on the synthetic mastoparan-like peptide L1A (IDGLKAIWKKVADLLKNT-NH2). At pH 10.0 L1A was 6 times more efficient in lysing large anionic (1-palmitoyl-oleoyl-sn-glycero-3-phosphocholine (POPC):1-palmitoyl-2-oleoyl-sn-glycero-3-phosphoglycerol (POPG)/(8:2)) unilamellar vesicles (LUVs) than at pH 4.0. Despite the reduction of 60% in the L1A net charge in basic pH its affinity for this vesicle was almost insensitive to pH. On the other hand, L1A insertion into monolayers was dramatically influenced by subphase condition, showing that, in the neutral and basic subphases, the peptide induced surface pressure changes that surpassed the membrane lateral pressure, being able to destabilize a bilayer structure. In addition, in the basic subphase, visualization of the compression isotherms of co-spread 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC):POPG (8:2) + 4.8 mol% L1A showed that the peptide induced significant changes in solid lipid domains, indicating its capability in perturbing lipid-packing. An insight into L1A lytic activity was also obtained in giant unilamellar vesicles (GUVs) using phase contrast microscopy. The suppression of L1A lytic activity at acidic pH is in keeping with its lower insertion capability and ability to disturb the lipid monolayer. The lytic activity observed under neutral and basic conditions showed a quick and stochastic leakage following a lag-time. The permeability and the leakage-time averaged over at least 14 single GUVs were dependent on the bulk condition. At basic pH, permeability is higher and quicker than in a neutral medium in good accordance with the lipid-packing perturbation.
Collapse
Affiliation(s)
- Dayane S Alvares
- UNESP - São Paulo State University, IBILCE, Department of Physics, São José do Rio Preto, SP, Brazil
| | - Taisa G Viegas
- UNESP - São Paulo State University, IBILCE, Department of Physics, São José do Rio Preto, SP, Brazil
| | - João Ruggiero Neto
- UNESP - São Paulo State University, IBILCE, Department of Physics, São José do Rio Preto, SP, Brazil.
| |
Collapse
|
217
|
Hauser-Kawaguchi A, Tolg C, Peart T, Milne M, Turley EA, Luyt LG. A truncated RHAMM protein for discovering novel therapeutic peptides. Bioorg Med Chem 2018; 26:5194-5203. [PMID: 30249497 DOI: 10.1016/j.bmc.2018.09.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 09/14/2018] [Accepted: 09/17/2018] [Indexed: 12/11/2022]
Abstract
The receptor for hyaluronan mediated motility (RHAMM, gene name HMMR) belongs to a group of proteins that bind to hyaluronan (HA), a high-molecular weight anionic polysaccharide that has pro-angiogenic and inflammatory properties when fragmented. We propose to use a chemically synthesized, truncated version of the protein (706-767), 7 kDa RHAMM, as a target receptor in the screening of novel peptide-based therapeutic agents. Chemical synthesis by Fmoc-based solid-phase peptide synthesis, and optimization using pseudoprolines, results in RHAMM protein of higher purity and yield than synthesis by recombinant protein production. 7 kDa RHAMM was evaluated for its secondary structure, ability to bind the native ligand, HA, and its bioactivity. This 62-amino acid polypeptide replicates the HA binding properties of both native and recombinant RHAMM protein. Furthermore, tubulin-derived HA peptide analogues that bind to recombinant RHAMM and were previously reported to compete with HA for interactions with RHAMM, bind with a similar affinity and specificity to the 7 kDa RHAMM. Therefore, in terms of its key binding properties, the 7 kDa RHAMM mini-protein is a suitable replacement for the full-length recombinant protein.
Collapse
Affiliation(s)
| | - Cornelia Tolg
- Cancer Research Laboratory Program, Lawson Health Research Institute and London Regional Cancer Program, London Health Sciences Center, London, Ontario, Canada
| | - Teresa Peart
- Cancer Research Laboratory Program, Lawson Health Research Institute and London Regional Cancer Program, London Health Sciences Center, London, Ontario, Canada
| | - Mark Milne
- Cancer Research Laboratory Program, Lawson Health Research Institute and London Regional Cancer Program, London Health Sciences Center, London, Ontario, Canada
| | - Eva A Turley
- Cancer Research Laboratory Program, Lawson Health Research Institute and London Regional Cancer Program, London Health Sciences Center, London, Ontario, Canada; Department of Biochemistry, Western University, London, Ontario, Canada; Department of Oncology, Western University, London, Ontario, Canada
| | - Leonard G Luyt
- Department of Chemistry, Western University, London, Ontario, Canada; Cancer Research Laboratory Program, Lawson Health Research Institute and London Regional Cancer Program, London Health Sciences Center, London, Ontario, Canada; Department of Oncology, Western University, London, Ontario, Canada; Department of Medical Imaging, Western University, London, Ontario, Canada.
| |
Collapse
|
218
|
Boudon S, Heidl M, Vuorinen A, Wandeler E, Campiche R, Odermatt A, Jackson E. Design, synthesis, and biological evaluation of novel selective peptide inhibitors of 11β-hydroxysteroid dehydrogenase 1. Bioorg Med Chem 2018; 26:5128-5139. [PMID: 30245006 DOI: 10.1016/j.bmc.2018.09.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/06/2018] [Accepted: 09/07/2018] [Indexed: 11/17/2022]
Abstract
The enzyme 11β-HSD1 plays a crucial role in the tissue-specific regulation of cortisol levels and it has been associated with various diseases. Inhibition of 11β-HSD1 is an attractive intervention strategy and the discovery of novel selective 11β-HSD1 inhibitors is of high relevance. In this study, we identified and evaluated a new series of selective peptide 11β-HSD1 inhibitors with potential for skin care applications. This novel scaffold was designed with the aid of molecular modeling and two previously reported inhibitors. SAR optimization yielded highly active peptides (IC50 below 400 nM) that were inactive at 1 µM concentration against structurally related enzymes (11β-HSD2, 17β-HSD1 and 17β-HSD2). The best performing peptides inhibited the conversion of cortisone into cortisol in primary human keratinocytes and the most active compound, 5d, was further shown to reverse cortisone-induced collagen damage in human ex-vivo tissue.
Collapse
Affiliation(s)
- Stephanie Boudon
- DSM Nutritional Products Ltd., Wurmisweg 576, 4303 Kaiseraugst, Switzerland
| | - Marc Heidl
- DSM Nutritional Products Ltd., Wurmisweg 576, 4303 Kaiseraugst, Switzerland
| | - Anna Vuorinen
- Division of Molecular and Systems Toxicology, Pharmacenter, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland
| | - Eliane Wandeler
- DSM Nutritional Products Ltd., Wurmisweg 576, 4303 Kaiseraugst, Switzerland
| | - Remo Campiche
- DSM Nutritional Products Ltd., Wurmisweg 576, 4303 Kaiseraugst, Switzerland
| | - Alex Odermatt
- Division of Molecular and Systems Toxicology, Pharmacenter, University of Basel, Klingelbergstrasse 50, 4056 Basel, Switzerland.
| | - Eileen Jackson
- DSM Nutritional Products Ltd., Wurmisweg 576, 4303 Kaiseraugst, Switzerland.
| |
Collapse
|
219
|
Flood DT, Hintzen JCJ, Bird MJ, Cistrone PA, Chen JS, Dawson PE. Leveraging the Knorr Pyrazole Synthesis for the Facile Generation of Thioester Surrogates for use in Native Chemical Ligation. Angew Chem Int Ed Engl 2018; 57:11634-11639. [PMID: 29908104 PMCID: PMC6126375 DOI: 10.1002/anie.201805191] [Citation(s) in RCA: 99] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/14/2018] [Indexed: 12/12/2022]
Abstract
Facile synthesis of C-terminal thioesters is integral to native chemical ligation (NCL) strategies for chemical protein synthesis. We introduce a new method of mild peptide activation, which leverages solid-phase peptide synthesis (SPPS) on an established resin linker and classical heterocyclic chemistry to convert C-terminal peptide hydrazides into their corresponding thioesters via an acyl pyrazole intermediate. Peptide hydrazides, synthesized on established trityl chloride resins, can be activated in solution with stoichiometric acetyl acetone (acac), readily proceed to the peptide acyl pyrazoles. Acyl pyrazoles are mild acylating agents and are efficiently exchanged with an aryl thiol, which can then be directly utilized in NCL. The mild, chemoselective, and stoichiometric activating conditions allow this method to be utilized through multiple sequential ligations without intermediate purification steps.
Collapse
Affiliation(s)
- Dillon T. Flood
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Jordi C. J. Hintzen
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Michael J. Bird
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Philip A. Cistrone
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Jason S. Chen
- Director of the Automated Synthesis Facility, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA)
| | - Philip E. Dawson
- Department of Chemistry, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037 (USA),
| |
Collapse
|
220
|
Zhang QX, Zhang Y, He LL, Ji ZL, Tong YH. Identification of a small antimycotic peptide produced by Bacillus amyloliquefaciens 6256. Pestic Biochem Physiol 2018; 150:78-82. [PMID: 30195391 DOI: 10.1016/j.pestbp.2018.07.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 06/22/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
Bacillus sp. 6256 is a good biocontrol agent against Botrytis cinerea which caused tomato gray mold disease. Strain 6256 was identified as B. amyloliquefaciens by analysis of its partial gyrB gene sequence. To identify and characterize the antimycotic peptides from the culture broth of the bacterium, the antimicrobial substances produced by B. amyloliquefaciens 6256 were isolated by ammonium sulfate precipitation, Superdex 200 gel filtration chromatography and DEAE anion exchange chromatography. The purified compound was designated as P657. The biological activity of P657 was stable at as high as 100 °C for 20 min and in pH value ranged from 5 to 10. The antimycotic compound was resistant to trypsin and proteinase K, and could completely inhibit spore germination of Botrytis cinerea in vitro. MALDI-TOF-MS analysis results showed the presence of fengycins A (C16-C17) and fengycins B (C15-C17) isoforms in P657.
Collapse
Affiliation(s)
- Qing Xia Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.
| | - Ying Zhang
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Ling Ling He
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Zhao Lin Ji
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Yun Hui Tong
- College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| |
Collapse
|
221
|
Abstract
The increasing popularity of peptides as promising molecular scaffolds for biomedical applications and as valuable biochemical probes makes new methods allowing for their modification highly desirable. We describe herein an optimized protocol based on a sequence of CuAAC click reactions and selective deprotection steps, which leads to an efficient multi-functionalization of synthetic peptides. The methodology has been successfully applied to the construction of defined heteroglycopeptides and fluorophore-quencher-containing probes for proteases. The developed chemistry thus represents an important addition to the available toolbox of methods enabling efficient postsynthetic modification of peptides. The commercial availability of numerous azide probes further greatly extends the application potential of the described methodology.
Collapse
Affiliation(s)
- Anna Kovalová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
,
Flemingovo nám. 2
, 16610
, Prague
, Czech Republic
.
; Tel: +420 220183317
| | - Radek Pohl
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
,
Flemingovo nám. 2
, 16610
, Prague
, Czech Republic
.
; Tel: +420 220183317
| | - Milan Vrabel
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences
,
Flemingovo nám. 2
, 16610
, Prague
, Czech Republic
.
; Tel: +420 220183317
| |
Collapse
|
222
|
Chesson CB, Huante M, Nusbaum RJ, Walker AG, Clover TM, Chinnaswamy J, Endsley JJ, Rudra JS. Nanoscale Peptide Self-assemblies Boost BCG-primed Cellular Immunity Against Mycobacterium tuberculosis. Sci Rep 2018; 8:12519. [PMID: 30131591 PMCID: PMC6104033 DOI: 10.1038/s41598-018-31089-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 07/23/2018] [Indexed: 11/30/2022] Open
Abstract
Bacillus Calmette-Guerin (BCG) is the only vaccine against TB and has limited protection efficacy, which wanes past adolescence. Multifunctional CD8+ T cells (IFN-γ+/TNF-α+/IL-2+) are associated with lower reactivation risk and enhanced control of active Mtb infection. Since boosting with BCG is contraindicated, booster vaccines that augment T cell immunity in the lungs of BCG-vaccinated individuals are urgently needed. We developed a vaccination strategy based on self-assembling peptide nanofibers presenting Mtb-specific CD8+ or CD4+ T cell epitopes that induce high frequency and antigen-specific effector memory T cells producing IFN-γ and IL-2. Intranasal immunization with peptide nanofibers was well tolerated in mice leading to increased antigen-specific CD8+ T cell population in the lungs. Co-assembled nanofibers of CD8+ T cell epitopes and toll-like receptor 2 (TLR2) agonists induced a 8-fold expansion in multifunctional CD8+ T cell populations in the lungs of vaccinated mice. Aerosol challenge with Mtb in BCG-primed and nanofiber-boosted mice provided an additional 0.5-log CFU reduction in lung bacterial load and indicating enhanced protection compared to BCG alone. Together, these data suggest that heterologous prime-boost with BCG and peptide nanofiber vaccines induces cell mediated immunity in the lung, reduces bacterial burden, and is a potentially safer alternative for boosting BCG-primed immunity.
Collapse
Affiliation(s)
- Charles B Chesson
- Department of Surgical Oncology, Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, 08823, USA
| | - Matthew Huante
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA
| | - Rebecca J Nusbaum
- Department of Pathology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Aida G Walker
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, 77555, Texas, USA
| | - Tara M Clover
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, 77555, Texas, USA
| | - Jagannath Chinnaswamy
- Department of Pathology and Laboratory Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Janice J Endsley
- Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, 77555, USA.
- Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX, 77555, USA.
| | - Jai S Rudra
- Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, 77555, Texas, USA.
- Sealy Institute for Vaccine Sciences, University of Texas Medical Branch, Galveston, TX, 77555, USA.
| |
Collapse
|
223
|
Atwater J, Mattes DS, Streit B, von Bojničić-Kninski C, Loeffler FF, Breitling F, Fuchs H, Hirtz M. Combinatorial Synthesis of Macromolecular Arrays by Microchannel Cantilever Spotting (µCS). Adv Mater 2018; 30:e1801632. [PMID: 29938845 DOI: 10.1002/adma.201801632] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 05/14/2018] [Indexed: 05/24/2023]
Abstract
Surface-bound microarrays of multiple oligo- and macromolecules (e.g., peptides, DNA) offer versatile options in biomedical applications like drug screening, DNA analysis, or medical diagnostics. Combinatorial syntheses of these molecules in situ can save significant resources in regard to processing time and material use. Furthermore, high feature densities are needed to enable high-throughput and low sample volumes as generally regarded in combinatorial chemistry. Here, a scanning-probe-lithography-based approach for the combinatorial in situ synthesis of macromolecules is presented in microarray format. Feature sizes below 40 µm allow for the creation of high-density arrays with feature densities of 62 500 features per cm2 . To demonstrate feasibility of this approach for biomedical applications, a multiplexed array of functional protein tags (HA- and FLAG-tag) is synthesized, and selective binding of respective epitope recognizing antibodies is shown. This approach uses only small amounts of base chemicals for synthesis and can be further parallelized, therefore, opening up a route to flexible, highly dense, and cost-effective microarrays.
Collapse
Affiliation(s)
- Jordyn Atwater
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Department of Chemistry Doane University, 014 Boswell Ave, Crete, NE, 68333, USA
| | - Daniela S Mattes
- Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Institute of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, 76131, Karlsruhe, Germany
| | - Bettina Streit
- Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Clemens von Bojničić-Kninski
- Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Felix F Loeffler
- Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Frank Breitling
- Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Harald Fuchs
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
- Physical Institute and Center for Nanotechnology (CeNTech), University of Münster, Wilhelm-Klemm-Straße 10, 48149, Münster, Germany
| | - Michael Hirtz
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| |
Collapse
|
224
|
Abstract
A thiol-thioester exchange system has been used to measure the propensities of diverse β-amino acid residues to participate in an α-helix-like conformation. These measurements depend on formation of a parallel coiled-coil tertiary structure when two peptide segments become linked by thioester formation. One peptide segment contains a "guest" site that accommodates diverse β residues and is distal to the coiled-coil interface. We find that helix propensity is influenced by side chain placement within the β residue [β3 (side chain adjacent to nitrogen) slightly favored relative to β2 (side chain adjacent to carbonyl)]. The previously recognized helix stabilization resulting from five-membered ring incorporation is quantified. These results are significant because so few quantitative thermodynamic measurements have been reported for α/β-peptide folding.
Collapse
Affiliation(s)
| | | | - Samuel H. Gellman
- Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| |
Collapse
|
225
|
Mishra B, Wang X, Lushnikova T, Zhang Y, Golla RM, Narayana JL, Wang C, McGuire TR, Wang G. Antibacterial, antifungal, anticancer activities and structural bioinformatics analysis of six naturally occurring temporins. Peptides 2018; 106:9-20. [PMID: 29842923 PMCID: PMC6063800 DOI: 10.1016/j.peptides.2018.05.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/21/2018] [Accepted: 05/25/2018] [Indexed: 12/22/2022]
Abstract
Antimicrobial peptides are a special class of natural products with potential applications as novel therapeutics. This study focuses on six temporins (four with no activity data and two as positive controls). Using synthetic peptides, we report antibacterial, antifungal, and anticancer activities of temporins-CPa, CPb, 1Ga, 1Oc, 1Ola, and 1SPa. While temporin-1Ga and temporin-1OLa showed higher antifungal and anticancer activity, most of these peptides were active primarily against Gram-positive bacteria. Temporin-1OLa, with the highest cell selectivity index, could preferentially kill methicillin-resistant Staphylococcus aureus (MRSA), consistent with a reduced hemolysis in the presence of bacteria. Mechanistically, temporin-1OLa rapidly killed MRSA by damaging bacterial membranes. Using micelles as a membrane-mimetic model, we determined the three-dimensional structure of temporin-1OLa by NMR spectroscopy. The peptide adopted a two-domain structure where a hydrophobic patch is followed by a classic amphipathic helix covering residues P3-I12. Such a structure is responsible for anti-biofilm ability in vitro and in vivo protection of wax moths Galleria mellonella from staphylococcal infection. Finally, our bioinformatic analysis leads to a classification of temporins into six types and confers significance to this NMR structure since temporin-1OLa shares a sequence model with 62% of temporins. Collectively, our results indicate the potential of temporin-1OLa as a new anti-MRSA compound, which shows an even better anti-biofilm capability in combination with linezolid.
Collapse
Affiliation(s)
- Biswajit Mishra
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA
| | - Xiuqing Wang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA; Department of Clinical Medicine, Ningxia Medical University, Yinchuan 750004, Ningxia, China
| | - Tamara Lushnikova
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA
| | - Yingxia Zhang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA; Key Laboratory of Tropical Biological Resources, Ministry of Education, College of Marine Science, Hainan University, Haikou 570228, Hainan, China
| | - Radha M Golla
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA
| | - Jayaram Lakshmaiah Narayana
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA
| | - Chunfeng Wang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA; The First Affiliated Hospital of Zhengzhou University, 1 Mianfang Road, Zhengzhou 450052, Henan, China
| | - Timothy R McGuire
- Department of Pharmacy Practice, University of Nebraska Medical Center, Omaha, NE 68198-6025, USA
| | - Guangshun Wang
- Department of Pathology and Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE 68198-5900, USA.
| |
Collapse
|
226
|
Son DH, Yang DJ, Sun JS, Kim SK, Kang N, Kang JY, Choi YH, Lee JH, Moh SH, Shin DM, Kim KW. A Novel Peptide, Nicotinyl⁻Isoleucine⁻Valine⁻Histidine (NA⁻IVH), Promotes Antioxidant Gene Expression and Wound Healing in HaCaT Cells. Mar Drugs 2018; 16:md16080262. [PMID: 30071627 PMCID: PMC6117656 DOI: 10.3390/md16080262] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 07/23/2018] [Accepted: 07/27/2018] [Indexed: 12/26/2022] Open
Abstract
Nicotinamide (NA), a water-soluble vitamin B3, has been shown to exert cellular-protective effects against reactive oxygen species (ROS). In order to improve the cellular-protective effects of NA, we synthesized a novel compound, nicotinyl–isoleucine–valine–histidine (NA–IVH), by combining NA with jellyfish peptides’ IVH. In the present study, we examined the cellular-protective effects of the novel synthetic nicotinyl-peptide, NA–IVH. We found that NA–IVH enhances the radical scavenging activity with a robust increase of the nuclear factor (erythroid-derived 2)-like factor (Nrf2) expression in human HaCaT keratinocytes. In addition, NA–IVH protected the cells from hydrogen peroxide (H2O2)-induced cell death. Interestingly, NA–IVH exhibited an improved wound-healing effect in a high glucose condition, possibly through the regulation of reactive oxygen species (ROS). Collectively, our results imply that a novel nicotinyl-peptide, NA–IVH, has a wound-healing effect in a hyperglycemic condition, possibly by modulating excessive ROS.
Collapse
Affiliation(s)
- Dong Hwee Son
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| | - Dong Joo Yang
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
- Department of Global Medical Science, Yonsei University Wonju College of Medicine, Wonju 26426, Korea.
| | - Ji Su Sun
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| | - Seul Ki Kim
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| | - Namju Kang
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| | - Jung Yun Kang
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| | - Yun-Hee Choi
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| | - Jeong Hun Lee
- Anti-Aging Research Institute of BIO-FD&C Co. Ltd., Incheon 21990, Korea.
| | - Sang Hyun Moh
- Anti-Aging Research Institute of BIO-FD&C Co. Ltd., Incheon 21990, Korea.
| | - Dong Min Shin
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| | - Ki Woo Kim
- Department of Oral Biology, BK21 PLUS, Yonsei University College of Dentistry, Seoul 03722, Korea.
| |
Collapse
|
227
|
Zhao XZ, Métifiot M, Kiselev E, Kessl JJ, Maddali K, Marchand C, Kvaratskhelia M, Pommier Y, Burke TR. HIV-1 Integrase-Targeted Short Peptides Derived from a Viral Protein R Sequence. Molecules 2018; 23:molecules23081858. [PMID: 30049955 PMCID: PMC6222646 DOI: 10.3390/molecules23081858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 07/18/2018] [Accepted: 07/23/2018] [Indexed: 01/28/2023] Open
Abstract
HIV-1 integrase (IN) inhibitors represent a new class of highly effective anti-AIDS therapeutics. Current FDA-approved IN strand transfer inhibitors (INSTIs) share a common mechanism of action that involves chelation of catalytic divalent metal ions. However, the emergence of IN mutants having reduced sensitivity to these inhibitors underlies efforts to derive agents that antagonize IN function by alternate mechanisms. Integrase along with the 96-residue multifunctional accessory protein, viral protein R (Vpr), are both components of the HIV-1 pre-integration complex (PIC). Coordinated interactions within the PIC are important for viral replication. Herein, we report a 7-mer peptide based on the shortened Vpr (69–75) sequence containing a biotin group and a photo-reactive benzoylphenylalanyl residue, and which exhibits low micromolar IN inhibitory potency. Photo-crosslinking experiments have indicated that the peptide directly binds IN. The peptide does not interfere with IN-DNA interactions or induce higher-order, aberrant IN multimerization, suggesting a mode of action for the peptide that is distinct from clinically used INSTIs and developmental allosteric IN inhibitors. This compact Vpr-derived peptide may serve as a valuable pharmacological tool to identify a potential new pharmacologic site.
Collapse
Affiliation(s)
- Xue Zhi Zhao
- Chemical Biology Laboratory, Center of Cancer Research, Frederick, MD 21702, USA.
| | - Mathieu Métifiot
- Developmental Therapeutics Branch and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Evgeny Kiselev
- Developmental Therapeutics Branch and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Jacques J Kessl
- College of Pharmacy and Center for Retrovirus Research, The Ohio State University, Columbus, OH 43210, USA.
- Department of Chemistry and Biochemistry, The University of Southern Mississippi, Hattiesburg, MS 39406, USA.
| | - Kasthuraiah Maddali
- Developmental Therapeutics Branch and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Christophe Marchand
- Developmental Therapeutics Branch and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Mamuka Kvaratskhelia
- College of Pharmacy and Center for Retrovirus Research, The Ohio State University, Columbus, OH 43210, USA.
- Division of Infectious Diseases, University of Colorado School of Medicine, Aurora, CO 80045, USA.
| | - Yves Pommier
- Developmental Therapeutics Branch and Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Terrence R Burke
- Chemical Biology Laboratory, Center of Cancer Research, Frederick, MD 21702, USA.
| |
Collapse
|
228
|
Shanbhag BK, Liu C, Haritos VS, He L. Understanding the Interplay between Self-Assembling Peptides and Solution Ions for Tunable Protein Nanoparticle Formation. ACS Nano 2018; 12:6956-6967. [PMID: 29928801 DOI: 10.1021/acsnano.8b02381] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Protein-based nanomaterials are gaining importance in biomedical and biosensor applications where tunability of the protein particle size is highly desirable. Rationally designed proteins and peptides offer control over molecular interactions between monomeric protein units to modulate their self-assembly and thus particle formation. Here, using an example enzyme-peptide system produced as a single construct by bacterial expression, we explore how solution conditions affect the formation and size of protein nanoparticles. We found two independent routes to particle formation, one facilitated by charge interactions between protein-peptide and peptide-peptide exemplified by pH change or the presence of NO3- or NH4+ and the second route via metal-ion coordination ( e.g., Mg2+) within peptides. We further demonstrate that the two independent factors of pH and Mg2+ ions can be combined to regulate nanoparticle size. Charge interactions between protein-peptide monomers play a key role in either promoting or suppressing protein assembly; the intermolecular contact points within protein-peptide monomers involved in nanoparticle formation were identified by chemical cross-linking mass spectrometry. Importantly, the protein nanoparticles retain their catalytic activities, suggesting that their native structures are unaffected. Once formed, protein nanoparticles remain stable over long periods of storage or with changed solution conditions. Nevertheless, formation of nanoparticles is also reversible-they can be disassembled by desalting the buffer to remove complexing agents ( e.g., Mg2+). This study defines the factors controlling formation of protein nanoparticles driven by self-assembly peptides and an understanding of complex ion-peptide interactions involved within, offering a convenient approach to tailor protein nanoparticles without changing amino acid sequence.
Collapse
Affiliation(s)
- Bhuvana K Shanbhag
- Department of Chemical Engineering , Monash University , Wellington Road , Clayton , VIC 3800 , Australia
| | - Chang Liu
- Department of Chemical Engineering , Monash University , Wellington Road , Clayton , VIC 3800 , Australia
| | - Victoria S Haritos
- Department of Chemical Engineering , Monash University , Wellington Road , Clayton , VIC 3800 , Australia
| | - Lizhong He
- Department of Chemical Engineering , Monash University , Wellington Road , Clayton , VIC 3800 , Australia
| |
Collapse
|
229
|
Hopkinson RJ, Langley GW, Belle R, Walport LJ, Dunne K, Münzel M, Salah E, Kawamura A, Claridge TDW, Schofield CJ. Human histone demethylase KDM6B can catalyse sequential oxidations. Chem Commun (Camb) 2018; 54:7975-7978. [PMID: 29961803 PMCID: PMC6044289 DOI: 10.1039/c8cc04057e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 06/06/2018] [Indexed: 12/12/2022]
Abstract
Jumonji domain-containing demethylases (JmjC-KDMs) catalyse demethylation of Nε-methylated lysines on histones and play important roles in gene regulation. We report selectivity studies on KDM6B (JMJD3), a disease-relevant JmjC-KDM, using synthetic lysine analogues. The results unexpectedly reveal that KDM6B accepts multiple Nε-alkylated lysine analogues, forming alcohol, aldehyde and carboxylic acid products.
Collapse
Affiliation(s)
- Richard J. Hopkinson
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
- Leicester Institute of Structural and Chemical Biology and Department of Chemistry
, University of Leicester
,
Lancaster Road
, Leicester
, LE1 7RH
, UK
.
| | - Gareth W. Langley
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
| | - Roman Belle
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
| | - Louise J. Walport
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
| | - Kate Dunne
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
- Radcliffe Department of Medicine
, Division of Cardiovascular Medicine
, BHF Centre of Research Excellence
, Wellcome Trust Centre for Human Genetics
,
Roosevelt Drive
, Oxford
, OX3 7BN
, UK
| | - Martin Münzel
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
| | - Eidarus Salah
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
| | - Akane Kawamura
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
- Radcliffe Department of Medicine
, Division of Cardiovascular Medicine
, BHF Centre of Research Excellence
, Wellcome Trust Centre for Human Genetics
,
Roosevelt Drive
, Oxford
, OX3 7BN
, UK
| | - Timothy D. W. Claridge
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
| | - Christopher J. Schofield
- Chemistry Research Laboratory
, University of Oxford
,
12 Mansfield Road
, Oxford
, OX1 3TA
, UK
.
| |
Collapse
|
230
|
Kijewska M, Waliczek M, Cal M, Jaremko Ł, Jaremko M, Król M, Kołodziej M, Lisowski M, Stefanowicz P, Szewczuk Z. Solid-phase synthesis of peptides containing aminoadipic semialdehyde moiety and their cyclisations. Sci Rep 2018; 8:10462. [PMID: 29993003 PMCID: PMC6041278 DOI: 10.1038/s41598-018-28798-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 06/29/2018] [Indexed: 11/23/2022] Open
Abstract
Pathological levels of oxidative stress (OS) have been implicated in many diseases including diabetes mellitus, neurodegenerative diseases, inflammatory diseases, atherosclerosis, and cancer. Studies of oxidative stress are however complicated by the low concentration of oxidation products. To resolve this problem, we tested a new derivative of aminoadipic semialdehyde (Fmoc-Aea-OH) in the solid-phase synthesis of carbonylated peptides. We prepared a series of peptides with free and acetylated N-terminal amino groups using the Fmoc-Aea-OH reagent. LC-MS, ESI-MS, and MS/MS spectra confirmed the sequences of the modified peptides, although the LC-MS and ESI-MS spectra were dominated by signals corresponding to dehydration products. NMR studies of acetylated products revealed that the dominant product formed in this reaction contains a 1,2,3,4-tetrahydropyridine-2-carboxylic acid residue. Another side reaction in this system was the cleavage of the amide bond between the Aea residue and the amino acid moiety preceding it resulting in the formation of a side product with a six-membered ring at the N-terminus (2,3,4,5-tetrahydropyridine-2-carboxylic acid residue). We found that, depending on the peptide sequence, one of those side products is predominant. Our work suggests new methods for the solid-state synthesis of peptides containing unnatural amino acids.
Collapse
Affiliation(s)
- Monika Kijewska
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland.
| | - Mateusz Waliczek
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Marta Cal
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Łukasz Jaremko
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Sciences & Engineering Division (BESE), Thuwal, 23955-6900, Saudi Arabia
| | - Mariusz Jaremko
- King Abdullah University of Science and Technology (KAUST), Biological and Environmental Sciences & Engineering Division (BESE), Thuwal, 23955-6900, Saudi Arabia.
| | - Maria Król
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Marta Kołodziej
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Marek Lisowski
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Piotr Stefanowicz
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland
| | - Zbigniew Szewczuk
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50-383, Wrocław, Poland
| |
Collapse
|
231
|
Wada H, Shimizu A, Osada T, Tanaka Y, Fukaya S, Sasaki E. Development of a novel immunoproteasome digestion assay for synthetic long peptide vaccine design. PLoS One 2018; 13:e0199249. [PMID: 29969453 PMCID: PMC6029771 DOI: 10.1371/journal.pone.0199249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 06/04/2018] [Indexed: 12/22/2022] Open
Abstract
Recently, many autologous tumor antigens have been examined for their potential use in cancer immunotherapy. However, the success of cancer vaccines in clinical trials has been limited, partly because of the limitations of using single, short peptides in most attempts. With this in mind, we aimed to develop multivalent synthetic long peptide (SLP) vaccines containing multiple cytotoxic T-lymphocyte (CTL) epitopes. However, to confirm whether a multivalent vaccine can induce an individual epitope-specific CTL, the only viable screening strategies currently available are interferon-gamma (IFN-μ enzyme-linked immunospot (ELISPOT) assays using human peripheral blood mononuclear cells, or expensive human leukocyte antigen (HLA)-expressing mice. In this report, we evaluated the use of our developed murine-20S immunoproteasome (i20S) digestion assay, and found that it could predict the results of IFN-μ ELISPOT assays. Importantly, the murine-i20S digestion assay not only predicted CTL induction, but also antitumor activity in an HLA-expressing mouse model. We conclude that the murine-i20S digestion assay is an extremely useful tool for the development of “all functional” multivalent SLP vaccines.
Collapse
MESH Headings
- Amino Acid Sequence
- Animals
- Cancer Vaccines/chemical synthesis
- Cancer Vaccines/immunology
- Cancer Vaccines/pharmacology
- Enzyme-Linked Immunospot Assay
- Epitopes, T-Lymphocyte/chemistry
- Epitopes, T-Lymphocyte/immunology
- HLA-A2 Antigen/genetics
- HLA-A2 Antigen/immunology
- Humans
- Immunoassay
- Immunotherapy, Active/methods
- Interferon-gamma/biosynthesis
- Interferon-gamma/immunology
- Lymphocyte Activation/drug effects
- Melanoma, Experimental/genetics
- Melanoma, Experimental/immunology
- Melanoma, Experimental/pathology
- Melanoma, Experimental/prevention & control
- Mice
- Mice, Transgenic
- Peptides/chemical synthesis
- Peptides/immunology
- Peptides/pharmacology
- Proteasome Endopeptidase Complex/genetics
- Proteasome Endopeptidase Complex/immunology
- T-Lymphocytes, Cytotoxic/cytology
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
- Transgenes
- Tumor Burden/drug effects
- Vaccines, Subunit
Collapse
Affiliation(s)
- Hiroshi Wada
- Discovery and Preclinical Research Division, Taiho Pharmaceutical Co. Ltd., Tsukuba, Ibaraki, Japan
- * E-mail:
| | - Atsushi Shimizu
- Discovery and Preclinical Research Division, Taiho Pharmaceutical Co. Ltd., Tsukuba, Ibaraki, Japan
| | - Toshihiro Osada
- Discovery and Preclinical Research Division, Taiho Pharmaceutical Co. Ltd., Tsukuba, Ibaraki, Japan
| | - Yuki Tanaka
- Discovery and Preclinical Research Division, Taiho Pharmaceutical Co. Ltd., Tsukuba, Ibaraki, Japan
| | - Satoshi Fukaya
- Discovery and Preclinical Research Division, Taiho Pharmaceutical Co. Ltd., Tsukuba, Ibaraki, Japan
| | - Eiji Sasaki
- Discovery and Preclinical Research Division, Taiho Pharmaceutical Co. Ltd., Tsukuba, Ibaraki, Japan
| |
Collapse
|
232
|
Mi Q, Yao G, Zhang GY, Zhang J, Wang J, Zhao P, Liu J. Disruption of GluR2/GAPDH Complex Interaction by TAT-GluR2 NT1-3-2 Peptide Protects against Neuronal Death Induced by Epilepsy. Ann Clin Lab Sci 2018; 48:460-468. [PMID: 30143487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE Excitotoxic neuronal death induced by epilepsy is associated with α-amino-3-hydroxyl-5-methylisoxazole-4-propionate acid (AMPA) receptors. The GluR2 subunit of AMPA receptors (AMPARs) may bind with glyceraldehyde-3-phosphate dehydrogenase (GAPDH). The GluR2/GAPDH complex co-internalizes upon stimulation of AMPARs, which might be involved in the development of epilepsy. In this research, we hypothesized that disruption of the GluR2/GAPDH interaction with an interfering peptide would protect against neuronal damage in vivo. METHODS Rat models of epilepsy were induced by pilocarpine hydrochloride. TAT-GluR2NT1-3-2 peptide was synthesized to block interaction between GluR2 and GAPDH. Fluoro-Jade B and TUNEL staining were used to detect degeneration and apoptosis of neurons after interference by the peptide. Co-immunoprecipitation assay and western-blot was performed to confirm that the peptide disturbed interactions between GluR2 and GAPDH. RESULTS The time of epileptic seizure was found to be delayed after peptide interference. It was concluded that administration of an interfering peptide is able to significantly reduce degeneration and apoptosis of neurons. The GluR2/GAPDH interaction and GAPDH nuclear expression were upregulated in the hippocampus of rats subjected to pilocarpine-induced seizures. CONCLUSION Disruption of the GluR2/GAPDH interaction by administration of an interfering peptide protects against seizure-induced neuronal damage that is dose dependent. Thus, the GluR2/GAPDH interaction may be a novel therapeutic target for development of treatment for epilepsy.
Collapse
Affiliation(s)
- Qing Mi
- Department of Pediatrics, Qilu Hospital of Shandong University
- Department of Pediatrics, Taian City Central Hospital
| | - Guo Yao
- Department of Pediatrics, Taian City Central Hospital
| | | | - Jinghui Zhang
- Department of Pediatrics, Qilu Hospital of Shandong University
| | - Jiwen Wang
- Department of Pediatrics, Qilu Hospital of Shandong University
- Department of Neurology, Shanghai Children's Medical Center, Shanghai, China
| | - Peng Zhao
- Department of Pediatrics, Taian City Central Hospital
| | - Jing Liu
- Department of Pediatrics, Taian City Central Hospital
| |
Collapse
|
233
|
Koidou VP, Argyris PP, Skoe EP, Mota Siqueira J, Chen X, Zhang L, Hinrichs JE, Costalonga M, Aparicio C. Peptide coatings enhance keratinocyte attachment towards improving the peri-implant mucosal seal. Biomater Sci 2018; 6:1936-1945. [PMID: 29850754 PMCID: PMC6019193 DOI: 10.1039/c8bm00300a] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
There is a critical need for preventing peri-implantitis as its prevalence has increased and dental implants lack features to prevent it. Research strategies to prevent peri-implantitis have focused on modifying dental implants to incorporate different antimicrobial agents. An alternative strategy consists of barring the expansion of the biofilm subgingivally by forming a long-lasting permucosal seal between the soft tissue and the implant surface. Here, we innovatively biofunctionalized titanium with bioinspired peptide coatings to strengthen biological interactions between epithelial cells and the titanium surface. We selected laminin 332- and ameloblastin-derived peptides (Lam, Ambn). Laminin 332 participates in the formation of hemidesmosomes by keratinocytes and promotes epithelial attachment around teeth; and ameloblastin, an enamel derived protein, is involved in tissue regeneration events following disruption of the periodontium. Lam, Ambn or combinations of both peptides were covalently immobilized on titanium discs. Successful immobilization of the peptides was confirmed by contact angle goniometry, X-ray photoelectron spectroscopy and fluorescent labelling of the peptides. Additionally, we confirmed the mechanical and thermochemical stability of the peptides on Ti substrates. Proliferation and hemidesmosome formation of human keratinocytes (TERT-2/OKF-6) were assessed by immunofluorescence labelling. The peptide-coated surfaces increased cell proliferation for up to 48 h in culture compared to control surfaces. Most importantly, formation of hemidesmosomes by keratinocytes was significantly increased on surfaces coated with Ambn + Lam peptides compared to control (p < 0.01) and monopeptide coatings (p < 0.005). Together, these results support the Ambn + Lam multipeptide coating as a promising candidate for inducing a permucosal seal around dental implants.
Collapse
Affiliation(s)
- Vasiliki P Koidou
- Minnesota Dental Research Center for Biomaterials and Biomechanics (MDRCBB), University of Minnesota, Minneapolis, Minnesota, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
234
|
Forsythe JG, English SL, Simoneaux RE, Weber AL. Synthesis of β-Peptide Standards for Use in Model Prebiotic Reactions. ORIGINS LIFE EVOL B 2018; 48:201-211. [PMID: 29796877 DOI: 10.1007/s11084-018-9558-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 04/30/2018] [Indexed: 10/16/2022]
Abstract
A one-pot method was developed for the preparation of a series of β-alanine standards of moderate size (2 to ≥12 residues) for studies concerning the prebiotic origins of peptides. The one-pot synthesis involved two sequential reactions: (1) dry-down self-condensation of β-alanine methyl ester, yielding β-alanine peptide methyl ester oligomers, and (2) subsequent hydrolysis of β-alanine peptide methyl ester oligomers, producing a series of β-alanine peptide standards. These standards were then spiked into a model prebiotic product mixture to confirm by HPLC the formation of β-alanine peptides under plausible reaction conditions. The simplicity of this approach suggests it can be used to prepare a variety of β-peptide standards for investigating differences between α- and β-peptides in the context of prebiotic chemistry.
Collapse
Affiliation(s)
- Jay G Forsythe
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC, 29424, USA
| | - Sloane L English
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC, 29424, USA
| | - Rachel E Simoneaux
- Department of Chemistry and Biochemistry, College of Charleston, Charleston, SC, 29424, USA
| | - Arthur L Weber
- Ames Research Center, SETI Institute, Mail Stop 239-4, Moffett Field, CA, 94035, USA.
| |
Collapse
|
235
|
Ovadia EM, Colby DW, Kloxin AM. Designing well-defined photopolymerized synthetic matrices for three-dimensional culture and differentiation of induced pluripotent stem cells. Biomater Sci 2018; 6:1358-1370. [PMID: 29675520 PMCID: PMC6126667 DOI: 10.1039/c8bm00099a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Induced pluripotent stem cells (iPSCs) are of interest for the study of disease, where these cells can be derived from patients and have the potential to be differentiated into any cell type; however, three-dimensional (3D) culture and differentiation of iPSCs within well-defined synthetic matrices for these applications remains limited. Here, we aimed to establish synthetic cell-degradable hydrogels that allow precise presentation of specific biochemical cues for 3D culture of iPSCs with relevance for hypothesis testing and lineage-specific differentiation. We synthesized poly(ethylene glycol)-(PEG)-peptide-based hydrogels by photoinitiated step growth polymerization and used them to test the hypothesis that the viability of iPSCs within these matrices could be rescued with appropriate biochemical cues inspired by proteins and integrins important for iPSC culture on Matrigel. Specifically, we selected a range of motifs inspired by iPSC binding to Matrigel, including laminin-derived IKVAV and YIGSR, α5β1-binding PHSRNG10RGDS, αvβ5-binding KKQRFRHRNRKG, and RGDS that is known to bind a variety of integrins for generally promoting cell adhesion. YIGSR and PHSRNG10RGDS resulted in the highest iPSC viability, where binding of β1 integrin was key, and these permissive compositions also allowed iPSC differentiation into neural progenitor cells (NPCs) (decreased oct4 expression and increased pax6 expression) in response to soluble factors. The resulting NPCs formed clusters of different sizes in response to each peptide, suggesting that matrix biochemical cues affect iPSC proliferation and clustering in 3D culture. In summary, we have established photopolymerizable synthetic matrices for the encapsulation, culture, and differentiation of iPSCs for studies of cell-matrix interactions and deployment in disease models.
Collapse
Affiliation(s)
- Elisa M Ovadia
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA.
| | | | | |
Collapse
|
236
|
Abstract
Self-assembly of molecules often results in new emerging properties. Even very short peptides can self-assemble into structures with a variety of physical and structural characteristics. Remarkably, many peptide assemblies show high catalytic activity in model reactions reaching efficiencies comparable to those found in natural enzymes by weight. In this review, we discuss different strategies used to rationally develop self-assembled peptide catalysts with natural and unnatural backbones as well as with metal-containing cofactors.
Collapse
Affiliation(s)
- O Zozulia
- Department of Chemistry, Syracuse University, 111 College Place, Syracuse, NY 13244, USA.
| | | | | |
Collapse
|
237
|
Abstract
Molecular self-assembly is a ubiquitous process in nature and central to bottom-up nanotechnology. In particular, the organization of peptide building blocks into ordered supramolecular structures has gained much interest due to the unique properties of the products, including biocompatibility, chemical and structural diversity, robustness and ease of large-scale synthesis. In addition, peptides, as short as dipeptides, contain all the molecular information needed to spontaneously form well-ordered structures at both the nano- and the micro-scale. Therefore, peptide supramolecular assembly has been effectively utilized to produce novel materials with tailored properties for various applications in the fields of material science, engineering, medicine, and biology. To further expand the conformational space of peptide assemblies in terms of structural and functional complexity, multicomponent (two or more) peptide supramolecular co-assembly has recently evolved as a promising extended approach, similar to the structural diversity of natural sequence-defined biopolymers (proteins) as well as of synthetic covalent co-polymers. The use of this methodology was recently demonstrated in various applications, such as nanostructure physical dimension control, the creation of non-canonical complex topologies, mechanical strength modulation, the design of light harvesting soft materials, fabrication of electrically conducting devices, induced fluorescence, enzymatic catalysis and tissue engineering. In light of these significant advancements in the field of peptide supramolecular co-assembly in the last few years, in this tutorial review, we provide an updated overview and future prospects of this emerging subject.
Collapse
Affiliation(s)
- Pandeeswar Makam
- Department of Molecular Microbiology and Biotechnology, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
| | | |
Collapse
|
238
|
Abstract
Self-assembled peptide nanostructures have been increasingly exploited as functional materials for applications in biomedicine and energy. The emergent properties of these nanomaterials determine the applications for which they can be exploited. It has recently been appreciated that nanomaterials composed of multicomponent coassembled peptides often display unique emergent properties that have the potential to dramatically expand the functional utility of peptide-based materials. This review presents recent efforts in the development of multicomponent peptide assemblies. The discussion includes multicomponent assemblies derived from short low molecular weight peptides, peptide amphiphiles, coiled coil peptides, collagen, and β-sheet peptides. The design, structure, emergent properties, and applications for these multicomponent assemblies are presented in order to illustrate the potential of these formulations as sophisticated next-generation bio-inspired materials.
Collapse
Affiliation(s)
- Danielle M Raymond
- Department of Chemistry, University of Rochester, Rochester, NY 14627-0216, USA.
| | | |
Collapse
|
239
|
Abstract
During the last two decades, the pharmaceutical industry has progressed from detecting small molecules to designing biologic-based therapeutics. Amino acid-based drugs are a group of biologic-based therapeutics that can effectively combat the diseases caused by drug resistance or molecular deficiency. Computational techniques play a key role to design and develop the amino acid-based therapeutics such as proteins, peptides and peptidomimetics. In this study, it was attempted to discuss the various elements for computational design of amino acid-based therapeutics. Protein design seeks to identify the properties of amino acid sequences that fold to predetermined structures with desirable structural and functional characteristics. Peptide drugs occupy a middle space between proteins and small molecules and it is hoped that they can target "undruggable" intracellular protein-protein interactions. Peptidomimetics, the compounds that mimic the biologic characteristics of peptides, present refined pharmacokinetic properties compared to the original peptides. Here, the elaborated techniques that are developed to characterize the amino acid sequences consistent with a specific structure and allow protein design are discussed. Moreover, the key principles and recent advances in currently introduced computational techniques for rational peptide design are spotlighted. The most advanced computational techniques developed to design novel peptidomimetics are also summarized.
Collapse
Affiliation(s)
- Tayebeh Farhadi
- Chronic Respiratory Diseases Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed MohammadReza Hashemian
- Chronic Respiratory Diseases Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Clinical Tuberculosis and Epidemiology Research Center, National Research Institute of Tuberculosis and Lung Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| |
Collapse
|
240
|
Bolm C, Hernández JG. From Synthesis of Amino Acids and Peptides to Enzymatic Catalysis: A Bottom-Up Approach in Mechanochemistry. ChemSusChem 2018; 11:1410-1420. [PMID: 29436773 DOI: 10.1002/cssc.201800113] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Indexed: 06/08/2023]
Abstract
Recently, chemical reactions induced or facilitated by mechanical energy have gained recognition in diverse areas of chemical synthesis. In particular, mechanosyntheses of amino acids and short peptides, along with their applications in catalysis, have revealed the high degree of stability of peptide bonds in environments of harsh mechanical stress. These observations quickly led to the recent interest in developing mechanochemical enzymatic reactions. Experimentally, manual grinding, ball-milling techniques, and twin-screw extrusion technology have proven valuable to convey mechanical forces into a chemical synthesis. These practices have enabled the establishment of more sustainable alternatives for chemical synthesis by reducing the use of organic solvents and waste production, thereby having a direct impact on the E-factor of the chemical process. In this Minireview, the series of events that allowed the development of mechanochemical enzymatic reactions are described from a bottom-up perspective.
Collapse
Affiliation(s)
- Carsten Bolm
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - José G Hernández
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| |
Collapse
|
241
|
Abstract
The third most abundant polypeptide conformation in nature, the polyproline-II helix, is a polar, extended secondary structure with a local organization stabilized by intercarbonyl interactions within the peptide chain. Here we design a hydrophobic polyproline-II helical peptide based on an oligomeric octahydroindole-2-carboxylic acid scaffold and demonstrate its transmembrane alignment in model lipid bilayers by means of solid-state 19F NMR. As result, we provide a first example of a purely artificial transmembrane peptide with a structural organization that is not based on hydrogen-bonding.
Collapse
Affiliation(s)
- Vladimir Kubyshkin
- Institute of Chemistry , Technical University of Berlin , Müller-Breslau-Strasse 10 , Berlin 10623 , Germany
| | - Stephan L Grage
- Institute of Biological Interfaces (IBG-2) , Karlsruhe Institute of Technology (KIT) , P.O.B. 3640, Karlsruhe 76021 , Germany
| | - Jochen Bürck
- Institute of Biological Interfaces (IBG-2) , Karlsruhe Institute of Technology (KIT) , P.O.B. 3640, Karlsruhe 76021 , Germany
| | - Anne S Ulrich
- Institute of Biological Interfaces (IBG-2) , Karlsruhe Institute of Technology (KIT) , P.O.B. 3640, Karlsruhe 76021 , Germany
- Institute of Organic Chemistry , KIT , Fritz-Haber-Weg 6 , Karlsruhe 76131 , Germany
| | - Nediljko Budisa
- Institute of Chemistry , Technical University of Berlin , Müller-Breslau-Strasse 10 , Berlin 10623 , Germany
| |
Collapse
|
242
|
De Bo G, Gall MAY, Kuschel S, De Winter J, Gerbaux P, Leigh DA. An artificial molecular machine that builds an asymmetric catalyst. Nat Nanotechnol 2018; 13:381-385. [PMID: 29610529 DOI: 10.1038/s41565-018-0105-3] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Accepted: 02/23/2018] [Indexed: 05/29/2023]
Abstract
Biomolecular machines perform types of complex molecular-level tasks that artificial molecular machines can aspire to. The ribosome, for example, translates information from the polymer track it traverses (messenger RNA) to the new polymer it constructs (a polypeptide) 1 . The sequence and number of codons read determines the sequence and number of building blocks incorporated into the biomachine-synthesized polymer. However, neither control of sequence2,3 nor the transfer of length information from one polymer to another (which to date has only been accomplished in man-made systems through template synthesis) 4 is easily achieved in the synthesis of artificial macromolecules. Rotaxane-based molecular machines5-7 have been developed that successively add amino acids8-10 (including β-amino acids 10 ) to a growing peptide chain by the action of a macrocycle moving along a mono-dispersed oligomeric track derivatized with amino-acid phenol esters. The threaded macrocycle picks up groups that block its path and links them through successive native chemical ligation reactions 11 to form a peptide sequence corresponding to the order of the building blocks on the track. Here, we show that as an alternative to translating sequence information, a rotaxane molecular machine can transfer the narrow polydispersity of a leucine-ester-derivatized polystyrene chain synthesized by atom transfer radical polymerization 12 to a molecular-machine-made homo-leucine oligomer. The resulting narrow-molecular-weight oligomer folds to an α-helical secondary structure 13 that acts as an asymmetric catalyst for the Juliá-Colonna epoxidation14,15 of chalcones.
Collapse
Affiliation(s)
- Guillaume De Bo
- School of Chemistry, University of Manchester, Manchester, UK
| | | | - Sonja Kuschel
- School of Chemistry, University of Manchester, Manchester, UK
| | - Julien De Winter
- Organic Synthesis and Mass Spectrometry Laboratory, Interdisciplinary Center for Mass Spectrometry (CISMa), University of Mons, Mons, Belgium
| | - Pascal Gerbaux
- Organic Synthesis and Mass Spectrometry Laboratory, Interdisciplinary Center for Mass Spectrometry (CISMa), University of Mons, Mons, Belgium
| | - David A Leigh
- School of Chemistry, University of Manchester, Manchester, UK.
| |
Collapse
|
243
|
Liu J, Cheng R, Rozovsky S. Synthesis and semisynthesis of selenopeptides and selenoproteins. Curr Opin Chem Biol 2018; 46:41-47. [PMID: 29723718 DOI: 10.1016/j.cbpa.2018.04.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/09/2018] [Accepted: 04/16/2018] [Indexed: 11/19/2022]
Abstract
The versatile chemistry of the genetically encoded amino acid selenocysteine (Sec) is employed in Nature to expand the reactivity of enzymes. In addition to, its role in biology, Sec is used in protein engineering to modify folding, stability, and reactivity of proteins, to introduce conjugations and to facilitate reactions. However, due to limitations related to Sec's insertion mechanism in Nature, much of the production of Sec containing peptides and proteins relies on synthesis and semisynthesis. Here, we review recent advances that have enabled the assembly of complicated selenoproteins, including novel uses of protecting groups for solid phase peptide synthesis, rapid selenoester driven chemical ligations and versatile expressed protein ligations.
Collapse
Affiliation(s)
- Jun Liu
- University of California, San Francisco, Department of Pharmaceutical Chemistry, 555 Mission Bay Blvd. South, San Francisco, CA 94158, United States.
| | - Rujin Cheng
- University of Delaware, Department of Chemistry and Biochemistry, Newark, DE 19716, United States
| | - Sharon Rozovsky
- University of Delaware, Department of Chemistry and Biochemistry, Newark, DE 19716, United States.
| |
Collapse
|
244
|
Mangadlao JD, Wang X, McCleese C, Escamilla M, Ramamurthy G, Wang Z, Govande M, Basilion JP, Burda C. Prostate-Specific Membrane Antigen Targeted Gold Nanoparticles for Theranostics of Prostate Cancer. ACS Nano 2018; 12:3714-3725. [PMID: 29641905 PMCID: PMC6392200 DOI: 10.1021/acsnano.8b00940] [Citation(s) in RCA: 102] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Prostate cancer is one of the most common cancers and among the leading causes of cancer deaths in the United States. Men diagnosed with the disease typically undergo radical prostatectomy, which often results in incontinence and impotence. Recurrence of the disease is often experienced by most patients with incomplete prostatectomy during surgery. Hence, the development of a technique that will enable surgeons to achieve a more precise prostatectomy remains an open challenge. In this contribution, we report a theranostic agent (AuNP-5kPEG-PSMA-1-Pc4) based on prostate-specific membrane antigen (PSMA-1)-targeted gold nanoparticles (AuNPs) loaded with a fluorescent photodynamic therapy (PDT) drug, Pc4. The fabricated nanoparticles are well-characterized by spectroscopic and imaging techniques and are found to be stable over a wide range of solvents, buffers, and media. In vitro cellular uptake experiments demonstrated significantly higher nanoparticle uptake in PSMA-positive PC3pip cells than in PSMA-negative PC3flu cells. Further, more complete cell killing was observed in Pc3pip than in PC3flu cells upon exposure to light at different doses, demonstrating active targeting followed by Pc4 delivery. Likewise, in vivo studies showed remission on PSMA-expressing tumors 14 days post-PDT. Atomic absorption spectroscopy revealed that targeted AuNPs accumulate 4-fold higher in PC3pip than in PC3flu tumors. The nanoparticle system described herein is envisioned to provide surgical guidance for prostate tumor resection and therapeutic intervention when surgery is insufficient.
Collapse
Affiliation(s)
- Joey Dacula Mangadlao
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Xinning Wang
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Christopher McCleese
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Maria Escamilla
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | | | - Ziying Wang
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Mukul Govande
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - James P. Basilion
- Department of Radiology, Case Western Reserve University, Cleveland, Ohio 44106, United States
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
- Corresponding Authors:.
| | - Clemens Burda
- Department of Chemistry, Case Western Reserve University, Cleveland, Ohio 44106, United States
- Corresponding Authors:.
| |
Collapse
|
245
|
Wang H, Feng Z, Qin Y, Wang J, Xu B. Nucleopeptide Assemblies Selectively Sequester ATP in Cancer Cells to Increase the Efficacy of Doxorubicin. Angew Chem Int Ed Engl 2018; 57:4931-4935. [PMID: 29451962 PMCID: PMC6014697 DOI: 10.1002/anie.201712834] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 02/01/2018] [Indexed: 12/20/2022]
Abstract
Herein, we report that assemblies of nucleopeptides selectively sequester ATP in complex conditions (for example, serum and cytosol). We developed assemblies of nucleopeptides that selectively sequester ATP over ADP. Counteracting enzymes interconvert ATP and ADP to modulate the nanostructures formed by the nucleopeptides and the nucleotides. The nucleopeptides, sequestering ATP effectively in cells, slow down efflux pumps in multidrug-resistant cancer cells, thus boosting the efficacy of doxorubicin, an anticancer drug. Investigation of 11 nucleopeptides (including d- and l-enantiomers) yields five more nucleopeptides that differentiate ATP and ADP through either precipitation or gelation. As the first example of assemblies of nucleopeptides that interact with ATP and disrupt intracellular ATP dynamics, this work illustrates the use of supramolecular assemblies to interact with small and essential biological molecules for controlling cell behavior.
Collapse
Affiliation(s)
- Huaimin Wang
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Zhaoqianqi Feng
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Yanan Qin
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Jiaqing Wang
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| | - Bing Xu
- Department of chemistry, Brandeis University, 415 South St, Waltham, MA, 02454, USA
| |
Collapse
|
246
|
Tian R, Han F, Yang J, Zhao HY, Mei Y, Deng AP, Fang L, Zhang XR. VR-10 Thrombospondin-1 Synthetic Polypeptide's Impact on Rhesus Choroid-Retinal Endothelial Cells. Cell Physiol Biochem 2018; 46:609-617. [PMID: 29617696 DOI: 10.1159/000488628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Accepted: 12/14/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS This study aimed to investigate the effects of the VR-10 TSP-1 synthetic polypeptide on cytokines and the proliferation and migration of endothelial cells, as well as exploring a new method for anti-ocular neoangiogenesis. METHODS We measured the proliferation of RF/6A cells by an MTT assay and investigated the migration of RF/6A cells by a Transwell chamber assay. We examined the mRNA transcript levels of TGF-β2, VEGF, PEDF, Bcl-2 and FasL in RF/6A cells by RT-PCR and evaluated the expression of Fas and caspase-3 proteins in RF/6A cells by western blot analysis. RESULTS 1. TSP-1 (1 µg/ml) and synthetic peptide VR-10 (0.1 µg/ml, 1 µg/ml and 10 µg/ml) inhibited the proliferation of RF/6A cells in a time and dose-dependent way. 2. TSP-1 and synthetic peptide VR-10 could inhibit the migration of RF/6A cells in a Transwell chamber (P < 0.001). It was demonstrated that 10 µg/ml synthetic peptide VR-10 had the strongest effect. 3. The expression of TGF-β2 mRNA in RF/6A cells increased after treatment with 1 µg/ml TSP-1 (P < 0.0001). However, there was no significant difference between the synthetic peptide VR-10 and the control group (P > 0.05). Expression of PEDF mRNA in RF/6A cells was increased after treatment with 1 µg/ml TSP-1 and synthetic peptide VR-10. We demonstrated that 10 µg/ml synthetic peptide VR-10 had the strongest effect (P < 0.001). There were significant differences between groups (P < 0.001). Expression of TGF-β2 mRNA in RF/6A cells increased after treatment with 1 µg/ml TSP-1 (P = 0.000). There was no significant difference between the synthetic peptide VR-10 and the control group (P > 0.05). PEDF mRNA expression in RF/6A cells decreased after 1 µg/ml TSP-1 and synthetic peptide VR-10 therapy, among which 10 µg/ml synthetic peptide VR-10 demonstrated the strongest effect (P < 0.001). There were significant differences between groups (P < 0.001), except for the 1 µg/ml synthetic peptide VR-10 and 1 µg/ml synthetic peptide VR-10 groups (P = 0.615). 4. Compared with the control group, FasL mRNA expression was significantly increased in the 10 µg/ml synthetic peptide VR-10 treatment group; however, Bcl-2 mRNA expression was decreased. 5. Western blotting showed that RF/6A cells in the control group mainly expressed the 32 kD procaspase-3 forms. For the 10 µg/ml synthetic peptide, VR-10 treatment group, it showed decreased expression of procaspase-3 (32 kD) and concomitant increased expression of its shorter pro apoptotic forms (20 kD). Compared with the control group, Fas protein expression significantly increased in the 10 µg/ml synthetic peptide VR-10 treatment group. CONCLUSIONS Synthetic peptide VR-10 had an inhibitory action on the proliferation and migration of RF/6A cells. VR-10 inhibited angiogenesis by its combined actions, which included up-regulating the expression of an anti-angiogenesis gene, namely, pigment epithelium-derived factor (PEDF), down-regulating the expression of the pro-angiogenic vascular endothelial growth factor (VEGF), and mediated endothelial cell apoptosis.
Collapse
|
247
|
Mosadeghi P, Heydari-Zarnagh H. Development and Evaluation of a Novel ELISA for Detection of Antibodies against HTLV-I Using Chimeric Peptides. Iran J Allergy Asthma Immunol 2018; 17:144-150. [PMID: 29757587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Accepted: 04/28/2018] [Indexed: 06/08/2023]
Abstract
We aimed to develope a peptide-based indirect ELISA to detect antibodies against Human T-lymphotropic virus type I (HTLV-I). Two chimeric peptides (CP-1 and CP-2) were designed using linear immunodominant epitopes of gp-46-I, and gp21-I proteins, according to the sequence from Uniprot database. These peptides were studied initially in the ELISA using infected sera. The most promising peptideCP-1, was used to develop a peptide ELISA for detection of HTLV-I infected sera. The optimal conditions for CP-1ELISA were: the optimum coating buffer was 100mM NaHCO3, pH 9.6; coating peptide concentration was 10 µg/mL; the optimal blocking buffer was5% fetal bovine serum (FBS); the secondary antibody concentration was 1:2000; and serum dilution was 1:20. 20serum samples from HTLV-I infected patients were evaluated by ELISA developed. CP-1 showed high antigenicity while lacking any cross-reactivity with normal human sera. The results of evaluations indicated that in comparison with commercial ELISA, CP-1 ELISA showed good sensitivity and specificity. With further validation, CP-1as described in the present study could be introduced as novel reliable and cost-effective candidates for the high-specific screening of HTLV-I/-II infections in endemic regions.
Collapse
Affiliation(s)
- Parvin Mosadeghi
- Department of Biology, Basic Science Faculty, Payam Noor University of Mashhad, Mashhad, Iran
| | - Hafez Heydari-Zarnagh
- Cellular and Molecular Research Center, Sabzevar University of Medical Sciences, Sabzevar, Iran
| |
Collapse
|
248
|
Caporale A, Doti N, Monti A, Sandomenico A, Ruvo M. Automatic procedures for the synthesis of difficult peptides using oxyma as activating reagent: A comparative study on the use of bases and on different deprotection and agitation conditions. Peptides 2018; 102:38-46. [PMID: 29486214 DOI: 10.1016/j.peptides.2018.02.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 01/31/2018] [Accepted: 02/16/2018] [Indexed: 12/17/2022]
Abstract
Solid-Phase Peptide Synthesis (SPPS) is a rapid and efficient methodology for the chemical synthesis of peptides and small proteins. However, the assembly of peptide sequences classified as "difficult" poses severe synthetic problems in SPPS for the occurrence of extensive aggregation of growing peptide chains which often leads to synthesis failure. In this framework, we have investigated the impact of different synthetic procedures on the yield and final purity of three well-known "difficult peptides" prepared using oxyma as additive for the coupling steps. In particular, we have comparatively investigated the use of piperidine and morpholine/DBU as deprotection reagents, the addition of DIPEA, collidine and N-methylmorpholine as bases to the coupling reagent. Moreover, the effect of different agitation modalities during the acylation reactions has been investigated. Data obtained represent a step forward in optimizing strategies for the synthesis of "difficult peptides".
Collapse
Affiliation(s)
- A Caporale
- IBB-CNR, Via Mezzocannone 16, 80134 Napoli, Italy; CIRPeB, Via Mezzocannone 16, 80134 Napoli, Italy
| | - N Doti
- IBB-CNR, Via Mezzocannone 16, 80134 Napoli, Italy; CIRPeB, Via Mezzocannone 16, 80134 Napoli, Italy.
| | - A Monti
- IBB-CNR, Via Mezzocannone 16, 80134 Napoli, Italy; DiSTABiF, Università degli Studi della Campania "Luigi Vanvitelli", Via Vivaldi 43, 81100, Caserta, Italy
| | - A Sandomenico
- IBB-CNR, Via Mezzocannone 16, 80134 Napoli, Italy; CIRPeB, Via Mezzocannone 16, 80134 Napoli, Italy
| | - M Ruvo
- IBB-CNR, Via Mezzocannone 16, 80134 Napoli, Italy; CIRPeB, Via Mezzocannone 16, 80134 Napoli, Italy.
| |
Collapse
|
249
|
Pinheiro-Júnior EL, Boldrini-França J, de Campos Araújo LMP, Santos-Filho NA, Bendhack LM, Cilli EM, Arantes EC. LmrBPP9: A synthetic bradykinin-potentiating peptide from Lachesis muta rhombeata venom that inhibits the angiotensin-converting enzyme activity in vitro and reduces the blood pressure of hypertensive rats. Peptides 2018; 102:1-7. [PMID: 29410030 DOI: 10.1016/j.peptides.2018.01.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/12/2018] [Accepted: 01/30/2018] [Indexed: 11/19/2022]
Abstract
Bradykinin-potentiating peptides (BPPs) are an important group of toxins present in Lachesis muta rhombeata venom. They act directly at renin-angiotensin-aldosterone system, through the inhibition of angiotensin-converting enzyme (ACE). This action may contribute to the hypotensive shock observed during the envenoming by this species. Thus, the main goal of this study was the solid-phase synthesis of a BPP found in L. m. rhombeata venom and its in vitro and in vivo characterization in relation to ACE inhibition and hypotensive activity, respectively. The LmrBPP9 peptide was synthesized using an automated solid-phase peptide synthesizer and purified by reversed-phase fast protein liquid chromatography (FPLC). The in vitro IC50 of the synthetic peptide is 4.25 ± 0.10 μM, showing a great capacity of ACE inhibition. The in vivo studies showed that LmrBPP9 induces blood pressure reduction, both in normotensive and hypertensive rats, being more pronounced in the last ones. These results agree with the in vitro results, showing that the synthetic peptide LmrBPP9 is a potential molecule to the development of a new antihypertensive drug.
Collapse
Affiliation(s)
| | - Johara Boldrini-França
- School of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | - Lusiane Maria Bendhack
- School of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | - Eliane Candiani Arantes
- School of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil.
| |
Collapse
|
250
|
Nie Y, Zhi X, Du H, Yang J. Zn(OAc)₂-Catalyzing Ring-Opening Polymerization of N-Carboxyanhydrides for the Synthesis of Well-Defined Polypeptides. Molecules 2018; 23:E760. [PMID: 29587473 PMCID: PMC6017970 DOI: 10.3390/molecules23040760] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 03/23/2018] [Accepted: 03/23/2018] [Indexed: 11/16/2022] Open
Abstract
Despite notable progress, the fabrication of well-defined polypeptides via controlled ring-opening polymerization (ROP) of α-amino acid N-carboxyanhydrides (NCAs) using convenient catalysts under mild conditions in a relatively short polymerization time is still challenging. Herein, an easily obtained catalyst system composed of zinc acetate and aniline was explored to mediate the fast ROP of γ-benzyl-l-glutamate-N-carboxyanhydride (BLG-NCA) monomer, to produce poly(γ-benzyl-l-glutamates) (PBLGs) with controllable molecular weights and narrow dispersity. Considering the excellent cooperative action of zinc acetate and a broad scope of aniline derivatives with different functional groups to control ROP of BLG-NCA, this method may offer a useful platform enabling the rapid generation of end-functionalized PBLG and block copolymers for numerous biomedical applications.
Collapse
Affiliation(s)
- Yanzhao Nie
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xinmei Zhi
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Haifeng Du
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
| | - Jing Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Bioprocess, College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China.
| |
Collapse
|