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Ran G, Fang W, Zhang L, Peng Y, Wu A, Li J, Ding X, Zeng S, He Y. Polypeptides IGF-1C and P24 synergistically promote osteogenic differentiation of bone marrow mesenchymal stem cells in vitro through the p38 and JNK signaling pathways. Int J Biochem Cell Biol 2021; 141:106091. [PMID: 34624508 DOI: 10.1016/j.biocel.2021.106091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Insulin-like growth factor-1 (IGF-1) and bone morphogenetic protein 2 (BMP-2) both promote osteogenesis of bone marrow mesenchymal stem cells (BMSCs). IGF-1C, the C domain peptide of IGF-1, and P24, a BMP-2-derived peptide, both have similar biological activities as their parent growth factors. This study aimed to investigate the effects and mechanisms of polypeptides IGF-1C and P24 on the osteogenic differentiation of BMSCs. METHODS The optimum concentrations of IGF-IC and P24 were explored. The effects of the two polypeptides on BMSC proliferation and osteogenic differentiation were examined using a CCK-8 assay, flow cytometry, alkaline phosphatase (ALP) staining, ALP activity assay, alizarin red S staining, qPCR, and Western blotting. In addition, specific pathway inhibitors were utilized to explore whether the p38 and JNK pathways were involved in this process. RESULTS The optimal concentration of both polypeptides was 50 μg/ml. IGF-1C and P24 synergistically promoted BMSC proliferation, increased ALP activity and calcified nodule formation, upregulated the mRNA and protein levels of Osx, Runx2, Ocn, Opn, and Col1a1, and improved the phosphorylation levels of p38 and JNK proteins. Inhibition of the pathways significantly reduced p38 and JNK activation and blocked Runx2 expression while inhibiting ALP activity and calcified nodule formation. CONCLUSIONS These findings suggest that IGF-1C and P24 synergistically promote the osteogenesis of BMSCs through activation of the p38 and JNK signaling pathways.
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Affiliation(s)
- Gaoying Ran
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Wei Fang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Lifang Zhang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Yuting Peng
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Anbiao Wu
- Department of Cardiology, Laboratory of Heart Center, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
| | - Jiatong Li
- Department of Oral Pathology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Xianglong Ding
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Shuguang Zeng
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Southern Medical University, Guangzhou 510280, China.
| | - Yan He
- Skeletal Biology Research Center, Department of Oral Maxillofacial Surgery, Harvard School of Dental Medicine, Boston, 02114 MA, USA
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Dvela-Levitt M, Shaw JL, Greka A. A Rare Kidney Disease To Cure Them All? Towards Mechanism-Based Therapies for Proteinopathies. Trends Mol Med 2020; 27:394-409. [PMID: 33341352 DOI: 10.1016/j.molmed.2020.11.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/20/2020] [Accepted: 11/20/2020] [Indexed: 12/30/2022]
Abstract
Autosomal dominant tubulointerstitial kidney diseases (ADTKDs) are a group of rare genetic diseases that lead to kidney failure. Mutations in the MUC1 gene cause ADTKD-MUC1 (MUC1 kidney disease, MKD), a disorder with no available therapies. Recent studies have identified the molecular and cellular mechanisms that drive MKD disease pathogenesis. Armed with patient-derived cell lines and pluripotent stem cell (iPSC)-derived kidney organoids, it was found that MKD is a toxic proteinopathy caused by the intracellular accumulation of misfolded MUC1 protein in the early secretory pathway. We discuss the advantages of studying rare monogenic kidney diseases, describe effective patient-derived model systems, and highlight recent mechanistic insights into protein quality control that have implications for additional proteinopathies beyond rare kidney diseases.
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Affiliation(s)
- Moran Dvela-Levitt
- The Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Jillian L Shaw
- The Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Anna Greka
- The Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
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Hou W, Jerome-Majewska LA. TMED2/em p24 is required in both the chorion and the allantois for placental labyrinth layer development. Dev Biol 2018; 444:20-32. [PMID: 30236446 DOI: 10.1016/j.ydbio.2018.09.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 09/10/2018] [Accepted: 09/10/2018] [Indexed: 01/08/2023]
Abstract
TMED2, a member of the transmembrane emp24 domain (TMED) family, is required for transport of cargo proteins between the ER and Golgi. TMED2 is also important for normal morphogenesis of mouse embryos and their associated placenta, and in fact Tmed2 homozygous mutant embryos arrest at mid-gestation due to a failure of placental labyrinth layer formation. Differentiation of the placental labyrinth layer depends on chorioallantoic attachment (contact between the chorion and allantois), and branching morphogenesis (mingling of cells from these two tissues). Since Tmed2 mRNA was found in both the chorion and allantois, and 50% of Tmed2 homozygous mutant embryos failed to undergo chorioallantoic attachment, the tissue-specific requirement of Tmed2 during placental labyrinth layer formation remained a mystery. Herein, we report differential localization of TMED2 protein in the chorion and allantois, abnormal ER retention of Fibronectin in Tmed2 homozygous mutant allantoises and cell-autonomous requirement for Tmed2 in the chorion for chorioallantoic attachment and fusion. Using an ex vivo model of explanted chorions and allantoises, we showed that chorioallantoic attachment failed to occur in 50% of samples when homozygous mutant chorions were recombined with wild type allantoises. Furthermore, though expression of genes associated with trophoblast differentiation was maintained in Tmed2 mutant chorions with chorioallantoic attachment, expression of these genes was attenuated. In addition, Tmed2 homozygous mutant allantoises could undergo branching morphogenesis, however the region of mixing between mutant and wild type cells was reduced, and expression of genes associated with trophoblast differentiation was also attenuated. Our data also suggest that Fibronectin is a cargo protein of TMED2 and indicates that Tmed2 is required cell-autonomously and non-autonomously in the chorion and the allantois for placental labyrinth layer formation.
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Affiliation(s)
- Wenyang Hou
- Department of Human Genetics, McGill University, 1205 Avenue Docteur Penfield, N5/13, Montreal, QC, Canada
| | - Loydie A Jerome-Majewska
- Department of Human Genetics, McGill University, 1205 Avenue Docteur Penfield, N5/13, Montreal, QC, Canada; Department of Anatomy and Cell Biology, McGill University, Montreal, QC, Canada; Department of Pediatrics, McGill University, 1001 Decarie Blvd, EM02210, Montreal, QC, Canada H4A 3J1; McGill University Health Centre Glen Site, 1001 Decarie Blvd, EM0.2210, Montreal, QC, Canada H4A 3J1.
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Sharma U, Gupta S, Venkatesh S, Rai A, Dhariwal AC, Husain M. Comparative genetic variability in HIV-1 subtype C p24 Gene in early age groups of infants. Virus Genes 2018; 54:647-661. [PMID: 30022343 DOI: 10.1007/s11262-018-1588-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 07/12/2018] [Indexed: 10/28/2022]
Abstract
It is important to study the molecular properties of vertically transmitted viruses in early infancy to understand disease progression. P24 having an important role in virus assembly and maturation was selected to explore the genotypic characteristics. Blood samples, obtained from 82 HIV-1 positive infants, were categorized into acute (≤ 6 months) and early (> 6-18 months) age groups. Of the 82 samples, 79 gave amplification results for p24, which were then sequenced and analysed. Amino acid heterogeneity analysis showed that substitutions were more frequent. Several substitution mutations were present in some of the sequences of both the age groups in the functional motifs of the gene namely Beta hairpin, CyPA binding loop, residues L136 and L190, linker region and major homology region. In the acute age group, an insertion of Asparagine residue (N5NL6) was observed in the β hairpin region in one of the sequences. This insertion was accompanied with analogous substitutions of N5Q, Q7L and G8R. In the early age group, a deletion of two residues; VK181-182, was observed at the C-terminal end in one of the sequences. These mutations may impair the structure of the protein leading to defective virus assembly. Protein variation effect analyzer software showed that deleterious mutations were more in the acute than the early age group. Variability analysis revealed that the amino acid heterogeneity was comparatively higher in the acute than the early age group. Variability in the virus was decreasing with the increasing age of the infants indicating that the virus is gradually evolving under positive selection pressure. HLA class 1 binding peptide analysis showed that the epitopes TPQDLNTML and RMYSPVSIL may be helpful in designing epitope based vaccine.
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Affiliation(s)
- Uma Sharma
- Molecular Virology Laboratory, Department of Biotechnology, Jamia Millia Islamia, Central University, New Delhi, 110025, India.,National Centre for Disease Control, Directorate General of Health Services, Ministry of Health and Family Welfare, Government of India, 22-Sham Nath Marg, Delhi, 110054, India
| | - Sunil Gupta
- National Centre for Disease Control, Directorate General of Health Services, Ministry of Health and Family Welfare, Government of India, 22-Sham Nath Marg, Delhi, 110054, India
| | - S Venkatesh
- National Centre for Disease Control, Directorate General of Health Services, Ministry of Health and Family Welfare, Government of India, 22-Sham Nath Marg, Delhi, 110054, India
| | - Arvind Rai
- National Centre for Disease Control, Directorate General of Health Services, Ministry of Health and Family Welfare, Government of India, 22-Sham Nath Marg, Delhi, 110054, India
| | - A C Dhariwal
- National Centre for Disease Control, Directorate General of Health Services, Ministry of Health and Family Welfare, Government of India, 22-Sham Nath Marg, Delhi, 110054, India
| | - Mohammad Husain
- Molecular Virology Laboratory, Department of Biotechnology, Jamia Millia Islamia, Central University, New Delhi, 110025, India.
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van Tienen C, Rugebregt S, Scherbeijn S, Götz H, Geurts van Kessel C. The performance of the Alere HIV combo point-of-care test on stored serum samples; useful for detection of early HIV-1 infections? Sex Transm Infect 2017; 94:331-333. [PMID: 28062734 DOI: 10.1136/sextrans-2016-052818] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 12/08/2016] [Accepted: 12/10/2016] [Indexed: 11/03/2022] Open
Abstract
INTRODUCTION The Alere HIV-1/2 Antigen/Antibody Combo point-of-care test is a commercially available 4th-generation rapid test for the diagnosis of HIV infection, including acute infection. We evaluated the sensitivity of this test in samples from patients with acute, recent or chronic HIV-1 infection. METHODS A validation of the test was performed using 89 HIV-positive serum samples collected in 2008-2016, that were stored at -20°C. Twenty-three samples were only p24-positive (acute infection); 49 samples were antibody-positive and p24-positive (recent infection); 17 samples were only antibody-positive (chronic infection). HIV infection was confirmed by standard-of-care assays and PCR. Samples came from patients attending an outpatient clinic for STDs at the Public Health Department and from patients within the Erasmus Medical Center, Rotterdam, the Netherlands. RESULTS The overall sensitivity of the test for diagnosing HIV infection based on detection of p24 antigen and/or antibodies was 92% (95% CI 86% to 98%) (82/89). In acute sera with only p24 antigen positivity, the sensitivity of the test decreased to 65% (95% CI 46% to 85%) (15/23). When both antibody and antigen testing were positive, the p24 sensitivity was only 24% (95% CI 12% to 36%) (12/49), but in these sera the final test result was positive in all sera (49/49) due to the positive antibody component. CONCLUSIONS In a laboratory setting, this test has an overall sensitivity of 92% to detect any stage of HIV-1 infection using sera specimens. It performs relatively well in detecting early HIV and may be beneficial as an initial screening in patients with a recent exposure to HIV. Additional testing in a laboratory setting remains mandatory as a proportion of acute HIV-1 infections are missed with this test.
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Affiliation(s)
- Carla van Tienen
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Sharona Rugebregt
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Sandra Scherbeijn
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Hannelore Götz
- Department of STI Control and Sexual Health, Rotterdam-Rijnmond Public Health Service, Rotterdam, The Netherlands.,Department of Public Health, Erasmus Medical Center, Rotterdam, The Netherlands
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