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Hanschkow M, Boulet N, Kempf E, Bouloumié A, Kiess W, Stein R, Körner A, Landgraf K. Expression of the Adipocyte Progenitor Markers MSCA1 and CD36 is Associated With Adipose Tissue Function in Children. J Clin Endocrinol Metab 2022; 107:e836-e851. [PMID: 34448000 PMCID: PMC8764220 DOI: 10.1210/clinem/dgab630] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Indexed: 12/05/2022]
Abstract
CONTEXT MSCA1 (mesenchymal stem cell antigen 1) and CD36 (cluster of differentiation 36) have been described as novel adipocyte progenitor markers in adults with a potential relevance for obesity and adipocyte progenitor function. OBJECTIVE With the early manifestation of obesity in children and formation of adipose tissue (AT) dysfunction, children provide the opportunity to characterize the function of MSCA1 and CD36 during physiological AT accumulation and with obesity and related disease. METHODS We investigated MSCA1 and CD36 expression in adipocytes and stroma vascular fraction (SVF) cells from 133 children of the Leipzig AT Childhood cohort with regard to AT accumulation and biology. In a subsample we analyzed how MSCA1 and CD36 expression is related to adipose progenitor capacities in vitro (ie, proliferation, differentiation and mitochondrial function). RESULTS Both MSCA1 and CD36 are differentially expressed in adipocytes and SVF cells of children. MSCA1 expression is positively correlated to obesity-associated AT dysfunction (ie, adipocyte hypertrophy and serum high-sensitivity C-reactive protein), and high SVF MSCA1 expression is associated with increased mitochondrial respiration in vitro. CD36 expression is not associated with AT dysfunction but SVF CD36 expression is downregulated in children with overweight and obesity and shows a positive association with the differentiation capacity of SVF cells ex vivo and in vitro. CONCLUSION Both MSCA1 and CD36 are associated with obesity-related alterations in AT of children. In particular, CD36 expression predicts adipogenic potential of SVF cells, indicating a potential role in the regulation of adipocyte hyperplasia and hypertrophy with obesity development in children.
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Affiliation(s)
- Martha Hanschkow
- University of Leipzig, Medical Faculty, University Hospital for Children and Adolescents, Center for Pediatric Research Leipzig (CPL), Leipzig, Germany
| | - Nathalie Boulet
- University of Toulouse, Institute of Metabolic and Cardiovascular Diseases, Inserm, Toulouse, France
| | - Elena Kempf
- University of Leipzig, Medical Faculty, University Hospital for Children and Adolescents, Center for Pediatric Research Leipzig (CPL), Leipzig, Germany
| | - Anne Bouloumié
- University of Toulouse, Institute of Metabolic and Cardiovascular Diseases, Inserm, Toulouse, France
| | - Wieland Kiess
- University of Leipzig, Medical Faculty, University Hospital for Children and Adolescents, Center for Pediatric Research Leipzig (CPL), Leipzig, Germany
| | - Robert Stein
- University of Leipzig, Medical Faculty, University Hospital for Children and Adolescents, Center for Pediatric Research Leipzig (CPL), Leipzig, Germany
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, Leipzig, Germany
| | - Antje Körner
- University of Leipzig, Medical Faculty, University Hospital for Children and Adolescents, Center for Pediatric Research Leipzig (CPL), Leipzig, Germany
| | - Kathrin Landgraf
- University of Leipzig, Medical Faculty, University Hospital for Children and Adolescents, Center for Pediatric Research Leipzig (CPL), Leipzig, Germany
- Correspondence: Kathrin Landgraf, PhD, Center for Pediatric Research Leipzig (CPL), Liebigstr. 19-21, 04103 Leipzig, Germany. E-mail:
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Goettsch C, Strzelecka-Kiliszek A, Bessueille L, Quillard T, Mechtouff L, Pikula S, Canet-Soulas E, Luis MJ, Fonta C, Magne D. TNAP as a therapeutic target for cardiovascular calcification: a discussion of its pleiotropic functions in the body. Cardiovasc Res 2022; 118:84-96. [PMID: 33070177 PMCID: PMC8752354 DOI: 10.1093/cvr/cvaa299] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/11/2020] [Accepted: 10/06/2020] [Indexed: 12/15/2022] Open
Abstract
Cardiovascular calcification (CVC) is associated with increased morbidity and mortality. It develops in several diseases and locations, such as in the tunica intima in atherosclerosis plaques, in the tunica media in type 2 diabetes and chronic kidney disease, and in aortic valves. In spite of the wide occurrence of CVC and its detrimental effects on cardiovascular diseases (CVD), no treatment is yet available. Most of CVC involve mechanisms similar to those occurring during endochondral and/or intramembranous ossification. Logically, since tissue-nonspecific alkaline phosphatase (TNAP) is the key-enzyme responsible for skeletal/dental mineralization, it is a promising target to limit CVC. Tools have recently been developed to inhibit its activity and preclinical studies conducted in animal models of vascular calcification already provided promising results. Nevertheless, as its name indicates, TNAP is ubiquitous and recent data indicate that it dephosphorylates different substrates in vivo to participate in other important physiological functions besides mineralization. For instance, TNAP is involved in the metabolism of pyridoxal phosphate and the production of neurotransmitters. TNAP has also been described as an anti-inflammatory enzyme able to dephosphorylate adenosine nucleotides and lipopolysaccharide. A better understanding of the full spectrum of TNAP's functions is needed to better characterize the effects of TNAP inhibition in diseases associated with CVC. In this review, after a brief description of the different types of CVC, we describe the newly uncovered additional functions of TNAP and discuss the expected consequences of its systemic inhibition in vivo.
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Affiliation(s)
- Claudia Goettsch
- Department of Internal Medicine I, Cardiology, Medical Faculty, RWTH Aachen
University, Aachen, Germany
| | - Agnieszka Strzelecka-Kiliszek
- Laboratory of Biochemistry of Lipids, Nencki Institute of Experimental
Biology, 3 Pasteur Street, 02-093 Warsaw, Poland
| | - Laurence Bessueille
- Institute of Molecular and Supramolecular Chemistry and Biochemistry
(ICBMS), UMR CNRS 5246, Université Claude Bernard Lyon 1, Bâtiment
Raulin, 43 Bd du 11 novembre 1918, Lyon 69622 Villeurbanne Cedex, France
| | - Thibaut Quillard
- PHY-OS Laboratory, UMR 1238 INSERM, Université de Nantes, CHU
de Nantes, France
| | - Laura Mechtouff
- Stroke Department, Hospices Civils de Lyon, France
- CREATIS Laboratory, CNRS UMR 5220, Inserm U1044, Université Claude Bernard
Lyon 1, Lyon, France
| | - Slawomir Pikula
- Laboratory of Biochemistry of Lipids, Nencki Institute of Experimental
Biology, 3 Pasteur Street, 02-093 Warsaw, Poland
| | - Emmanuelle Canet-Soulas
- CarMeN Laboratory, Univ Lyon, INSERM, INRA, INSA Lyon, Université Claude
Bernard Lyon 1, Lyon, France
| | - Millan Jose Luis
- Human Genetics Program, Sanford Burnham Prebys Medical Discovery
Institute, La Jolla, CA 92037, USA
| | - Caroline Fonta
- Brain and Cognition Research Center CerCo, CNRS UMR5549, Université de
Toulouse, France
| | - David Magne
- Institute of Molecular and Supramolecular Chemistry and Biochemistry
(ICBMS), UMR CNRS 5246, Université Claude Bernard Lyon 1, Bâtiment
Raulin, 43 Bd du 11 novembre 1918, Lyon 69622 Villeurbanne Cedex, France
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Briolay A, Bessueille L, Magne D. TNAP: A New Multitask Enzyme in Energy Metabolism. Int J Mol Sci 2021; 22:ijms221910470. [PMID: 34638808 PMCID: PMC8509042 DOI: 10.3390/ijms221910470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/17/2021] [Accepted: 09/23/2021] [Indexed: 02/06/2023] Open
Abstract
Tissue-nonspecific alkaline phosphatase (TNAP) is mainly known for its necessary role in skeletal and dental mineralization, which relies on the hydrolysis of the mineralization inhibitor inorganic pyrophosphate (PPi). Mutations in the gene encoding TNAP leading to severe hypophosphatasia result in strongly reduced mineralization and perinatal death. Fortunately, the relatively recent development of a recombinant TNAP with a bone anchor has allowed to correct the bone defects and prolong the life of affected babies and children. Researches on TNAP must however not be slowed down, because accumulating evidence indicates that TNAP activation in individuals with metabolic syndrome (MetS) is associated with enhanced cardiovascular mortality, presumably in relation with cardiovascular calcification. On the other hand, TNAP appears to be necessary to prevent the development of steatohepatitis in mice, suggesting that TNAP plays protective roles. The aim of the present review is to highlight the known or suspected functions of TNAP in energy metabolism that may be associated with the development of MetS. The location of TNAP in liver and its function in bile excretion, lipopolysaccharide (LPS) detoxification and fatty acid transport will be presented. The expression and function of TNAP in adipocyte differentiation and thermogenesis will also be discussed. Given that TNAP is a tissue- and substrate-nonspecific phosphatase, we believe that it exerts several crucial pathophysiological functions that are just beginning to be discovered.
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Zhang Z, Nam HK, Crouch S, Hatch NE. Tissue Nonspecific Alkaline Phosphatase Function in Bone and Muscle Progenitor Cells: Control of Mitochondrial Respiration and ATP Production. Int J Mol Sci 2021; 22:ijms22031140. [PMID: 33498907 PMCID: PMC7865776 DOI: 10.3390/ijms22031140] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 01/17/2021] [Accepted: 01/20/2021] [Indexed: 12/23/2022] Open
Abstract
Tissue nonspecific alkaline phosphatase (TNAP/Alpl) is associated with cell stemness; however, the function of TNAP in mesenchymal progenitor cells remains largely unknown. In this study, we aimed to establish an essential role for TNAP in bone and muscle progenitor cells. We investigated the impact of TNAP deficiency on bone formation, mineralization, and differentiation of bone marrow stromal cells. We also pursued studies of proliferation, mitochondrial function and ATP levels in TNAP deficient bone and muscle progenitor cells. We find that TNAP deficiency decreases trabecular bone volume fraction and trabeculation in addition to decreased mineralization. We also find that Alpl−/− mice (global TNAP knockout mice) exhibit muscle and motor coordination deficiencies similar to those found in individuals with hypophosphatasia (TNAP deficiency). Subsequent studies demonstrate diminished proliferation, with mitochondrial hyperfunction and increased ATP levels in TNAP deficient bone and muscle progenitor cells, plus intracellular expression of TNAP in TNAP+ cranial osteoprogenitors, bone marrow stromal cells, and skeletal muscle progenitor cells. Together, our results indicate that TNAP functions inside bone and muscle progenitor cells to influence mitochondrial respiration and ATP production. Future studies are required to establish mechanisms by which TNAP influences mitochondrial function and determine if modulation of TNAP can alter mitochondrial respiration in vivo.
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Affiliation(s)
- Zhi Zhang
- Department of Natural Sciences, University of Michigan-Dearborn, 4901 Evergreen Rd, Dearborn, MI 48128, USA;
| | - Hwa Kyung Nam
- School of Dentistry, University of Michigan-Ann Arbor, 1011 N University Avenue, Ann Arbor, MI 48103, USA; (H.K.N.); (S.C.)
| | - Spencer Crouch
- School of Dentistry, University of Michigan-Ann Arbor, 1011 N University Avenue, Ann Arbor, MI 48103, USA; (H.K.N.); (S.C.)
| | - Nan E. Hatch
- School of Dentistry, University of Michigan-Ann Arbor, 1011 N University Avenue, Ann Arbor, MI 48103, USA; (H.K.N.); (S.C.)
- Correspondence: ; Tel.: +1-734-764-6567
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Choudhary P, Gupta A, Singh S. Therapeutic Advancement in Neuronal Transdifferentiation of Mesenchymal Stromal Cells for Neurological Disorders. J Mol Neurosci 2020; 71:889-901. [PMID: 33047251 DOI: 10.1007/s12031-020-01714-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 09/16/2020] [Indexed: 12/12/2022]
Abstract
Neurodegenerative disorders have become the leading cause of chronic pain and death. Treatments available are not sufficient to help the patients as they only alleviate the symptoms and not the cause. In this regard, stem cells therapy has emerged as an upcoming option for the replacement of dead and damaged neurons. Stem cells, in general, are characterized as cells exhibiting potency properties, i.e., on being subjected to specific conditions they transform into cells of another lineage. Of all the types, mesenchymal stem cells (MSCs) are known for their pluripotent nature without the obstacle of ethical concern surrounding the procurement of other cell types. Although fibroblasts are quite similar to MSCs morphologically, certain markers like CD73, CD 90 are specific to MSCs, making both the cell types distinguishable from each other. This is implemented while procuring MSCs from a plethora of sources like umbilical cord blood, adipose tissue, bone marrow, etc. Among these, bone marrow MSCs are the most widely used type for neural regeneration. Neural regeneration is achieved via transdifferentiation. Several studies have either transplanted the stem cells into rodent models or have carried out transdifferentiation in vitro. The process involves a combination of growth factors, pre-treatment factors, and neuronal differentiation inducing mediums. The results obtained are characterized by neuron-like morphology, expression of markers, along with electrophysical activity in some. Recent attempts involve exploring biomaterials that may mimic the native ECM and therefore can be directly introduced at the site of interest. The review gives a brief description of MSCs, their sources and markers, and the different attempts that have been made towards achieving the goal of differentiating MSCs into neurons.
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Affiliation(s)
- Princy Choudhary
- Applied Science Department, Indian Institute of Information Technology, Allahabad, UP, India
| | - Ayushi Gupta
- Applied Science Department, Indian Institute of Information Technology, Allahabad, UP, India
| | - Sangeeta Singh
- Applied Science Department, Indian Institute of Information Technology, Allahabad, UP, India.
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6
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Bessueille L, Briolay A, Como J, Mebarek S, Mansouri C, Gleizes M, El Jamal A, Buchet R, Dumontet C, Matera EL, Mornet E, Millan JL, Fonta C, Magne D. Tissue-nonspecific alkaline phosphatase is an anti-inflammatory nucleotidase. Bone 2020; 133:115262. [PMID: 32028019 PMCID: PMC7185042 DOI: 10.1016/j.bone.2020.115262] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/16/2020] [Accepted: 02/03/2020] [Indexed: 12/11/2022]
Abstract
Tissue-nonspecific alkaline phosphatase (TNAP) is necessary for skeletal mineralization by its ability to hydrolyze the mineralization inhibitor inorganic pyrophosphate (PPi), which is mainly generated from extracellular ATP by ectonucleotide pyrophosphatase phosphodiesterase 1 (NPP1). Since children with TNAP deficiency develop bone metaphyseal auto-inflammations in addition to rickets, we hypothesized that TNAP also exerts anti-inflammatory effects relying on the hydrolysis of pro-inflammatory adenosine nucleotides into the anti-inflammatory adenosine. We explored this hypothesis in bone metaphyses of 7-day-old Alpl+/- mice (encoding TNAP), in mineralizing hypertrophic chondrocytes and osteoblasts, and non-mineralizing mesenchymal stem cells (MSCs) and neutrophils, which express TNAP and are present, or can be recruited in the metaphysis. Bone metaphyses of 7-day-old Alpl+/- mice had significantly increased levels of Il-1β and Il-6 and decreased levels of the anti-inflammatory Il-10 cytokine as compared with Alpl+/+ mice. In bone metaphyses, murine hypertrophic chondrocytes and osteoblasts, Alpl mRNA levels were much higher than those of the adenosine nucleotidases Npp1, Cd39 and Cd73. In hypertrophic chondrocytes, inhibition of TNAP with 25 μM of MLS-0038949 decreased the hydrolysis of AMP and ATP. However, TNAP inhibition did not significantly modulate ATP- and adenosine-associated effects in these cells. We observed that part of TNAP proteins in hypertrophic chondrocytes was sent from the cell membrane to matrix vesicles, which may explain why TNAP participated in the hydrolysis of ATP but did not significantly modulate its autocrine pro-inflammatory effects. In MSCs, TNAP did not participate in ATP hydrolysis nor in secretion of inflammatory mediators. In contrast, in neutrophils, TNAP inhibition with MLS-0038949 significantly exacerbated ATP-associated activation and secretion of IL-1β, and extended cell survival. Collectively, these results demonstrate that TNAP is a nucleotidase in both hypertrophic chondrocytes and neutrophils, and that this nucleotidase function is associated with autocrine effects on inflammation only in neutrophils.
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Affiliation(s)
- L Bessueille
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - A Briolay
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - J Como
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - S Mebarek
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - C Mansouri
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - M Gleizes
- Centre de recherche cerveau et cognition (CERCO), UMR CNRS 5549 université de Toulouse, UPS, France
| | - A El Jamal
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - R Buchet
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - C Dumontet
- Anticancer Antibodies, CRCL, INSERM U1052, CNRS UMR 5286, CLB, UCBL, Lyon, France
| | - E L Matera
- Anticancer Antibodies, CRCL, INSERM U1052, CNRS UMR 5286, CLB, UCBL, Lyon, France
| | - E Mornet
- Service de biologie, unité de génétique constitutionnelle, centre hospitalier de Versailles, Le Chesnay, France
| | - J L Millan
- Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - C Fonta
- Centre de recherche cerveau et cognition (CERCO), UMR CNRS 5549 université de Toulouse, UPS, France
| | - D Magne
- Univ Lyon; University Lyon 1; ICBMS, UMR CNRS 5246, F-69622 Lyon, France.
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Petrenko Y, Vackova I, Kekulova K, Chudickova M, Koci Z, Turnovcova K, Kupcova Skalnikova H, Vodicka P, Kubinova S. A Comparative Analysis of Multipotent Mesenchymal Stromal Cells derived from Different Sources, with a Focus on Neuroregenerative Potential. Sci Rep 2020; 10:4290. [PMID: 32152403 PMCID: PMC7062771 DOI: 10.1038/s41598-020-61167-z] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 02/04/2020] [Indexed: 02/07/2023] Open
Abstract
Multipotent mesenchymal stromal cells (MSCs) can be considered an accessible therapeutic tool for regenerative medicine. Here, we compared the growth kinetics, immunophenotypic and immunomodulatory properties, gene expression and secretome profile of MSCs derived from human adult bone marrow (BM-MSCs), adipose tissue (AT-MSCs) and Wharton’s jelly (WJ-MSCs) cultured in clinically-relevant conditions, with the focus on the neuroregenerative potential. All the cell types were positive for CD10/CD29/CD44/CD73/CD90/CD105/HLA-ABC and negative for CD14/CD45/CD235a/CD271/HLA-DR/VEGFR2 markers, but they differed in the expression of CD34/CD133/CD146/SSEA-4/MSCA-1/CD271/HLA-DR markers. BM-MSCs displayed the highest immunomodulatory activity compared to AT- and WJ-MSCs. On the other hand, BM-MSCs secreted the lower content and had the lower gene expression of neurotrophic growth factors compared to other cell lines, which may be caused by the higher sensitivity of BM-MSCs to nutrient limitations. Despite the differences in growth factor secretion, the MSC secretome derived from all cell sources had a pronounced neurotrophic potential to stimulate the neurite outgrowth of DRG-neurons and reduce the cell death of neural stem/progenitor cells after H2O2 treatment. Overall, our study provides important information for the transfer of basic MSC research towards clinical-grade manufacturing and therapeutic applications.
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Affiliation(s)
- Yuriy Petrenko
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 14220, Prague, Czech Republic.
| | - Irena Vackova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 14220, Prague, Czech Republic
| | - Kristyna Kekulova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 14220, Prague, Czech Republic.,2nd Medical Faculty, Charles University, V Uvalu 84, 15006, Prague, Czech Republic
| | - Milada Chudickova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 14220, Prague, Czech Republic
| | - Zuzana Koci
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 14220, Prague, Czech Republic
| | - Karolina Turnovcova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 14220, Prague, Czech Republic
| | - Helena Kupcova Skalnikova
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Rumburska 89, 277 21, Libechov, Czech Republic
| | - Petr Vodicka
- Institute of Animal Physiology and Genetics of the Czech Academy of Sciences, Rumburska 89, 277 21, Libechov, Czech Republic
| | - Sarka Kubinova
- Institute of Experimental Medicine of the Czech Academy of Sciences, Videnska 1083, 14220, Prague, Czech Republic.
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Zaher DM, El‐Gamal MI, Omar HA, Aljareh SN, Al‐Shamma SA, Ali AJ, Zaib S, Iqbal J. Recent advances with alkaline phosphatase isoenzymes and their inhibitors. Arch Pharm (Weinheim) 2020; 353:e2000011. [DOI: 10.1002/ardp.202000011] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/09/2020] [Accepted: 02/10/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Dana M. Zaher
- Sharjah Institute for Medical ResearchSharjah United Arab Emirates
| | - Mohammed I. El‐Gamal
- Sharjah Institute for Medical ResearchSharjah United Arab Emirates
- College of PharmacySharjah United Arab Emirates
- Department of Medicinal ChemistryFaculty of PharmacyMansoura Egypt
| | - Hany A. Omar
- Sharjah Institute for Medical ResearchSharjah United Arab Emirates
- College of PharmacySharjah United Arab Emirates
- Department of PharmacologyFaculty of PharmacyBeni‐Suef Egypt
| | | | | | - Aya J. Ali
- College of PharmacySharjah United Arab Emirates
| | - Sumera Zaib
- Centre for Advanced Drug ResearchCOMSATS University Islamabad Abbottabad Campus Abbottabad Pakistan
| | - Jamshed Iqbal
- Centre for Advanced Drug ResearchCOMSATS University Islamabad Abbottabad Campus Abbottabad Pakistan
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Nakamura T, Nakamura-Takahashi A, Kasahara M, Yamaguchi A, Azuma T. Tissue-nonspecific alkaline phosphatase promotes the osteogenic differentiation of osteoprogenitor cells. Biochem Biophys Res Commun 2020; 524:702-709. [PMID: 32035618 DOI: 10.1016/j.bbrc.2020.01.136] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 01/23/2020] [Indexed: 01/21/2023]
Abstract
Tissue-nonspecific alkaline phosphatase (TNAP) is expressed in the calcification sites of the skeletal tissue. It promotes hydroxyapatite crystal formation by degrading inorganic pyrophosphate (PPi) and increasing inorganic phosphate (Pi) concentration. However, abnormalities in Alpl-/- mouse-derived osteoblasts are poorly understood, and the involvement of TNAP in osteoblast differentiation remains unclear. Therefore, in this study, we aimed to investigate the precise role of TNAP in osteoblast differentiation. TNAP inhibition by levamisole, a reversible TNAP inhibitor, suppressed the expression of osteoblast differentiation marker genes in wild-type osteoblastic cells. Alpl overexpression increased the expression of master osteoblast transcription factor genes runt-related transcription factor 2 (Runx2) and Sp7 and the mature osteoblast and osteocyte marker genes, bone γ-carboxyglutamate protein 2 (Bglap2) and dentin matrix protein 1 (Dmp1), respectively in Alpl-deficient osteoblastic cells. TNAP regulated Runx2 expression, which in turn regulated the expression of all other osteoblast markers, except Dmp1. Dmp1 expression was independent of RUNX2 but was dependent on extracellular Pi concentration in Runx2-deficient osteogenic cells. These results suggest that TNAP functions as an osteogenic differentiation regulator either by regulating Runx2 expression or by controlling extracellular Pi concentration.
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Affiliation(s)
- Takashi Nakamura
- Department of Biochemistry, Tokyo Dental College, Tokyo, 101-0061, Japan; Tokyo Dental College Research Branding Project, Tokyo Dental College, Tokyo, 101-0061, Japan
| | - Aki Nakamura-Takahashi
- Tokyo Dental College Research Branding Project, Tokyo Dental College, Tokyo, 101-0061, Japan; Department of Pharmacology, Tokyo Dental College, Tokyo, 101-0061, Japan
| | - Masataka Kasahara
- Tokyo Dental College Research Branding Project, Tokyo Dental College, Tokyo, 101-0061, Japan; Department of Pharmacology, Tokyo Dental College, Tokyo, 101-0061, Japan
| | - Akira Yamaguchi
- Tokyo Dental College Research Branding Project, Tokyo Dental College, Tokyo, 101-0061, Japan; Oral Health Science Center, Tokyo Dental College, Tokyo, 101-0061, Japan
| | - Toshifumi Azuma
- Department of Biochemistry, Tokyo Dental College, Tokyo, 101-0061, Japan; Tokyo Dental College Research Branding Project, Tokyo Dental College, Tokyo, 101-0061, Japan; Oral Health Science Center, Tokyo Dental College, Tokyo, 101-0061, Japan.
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Liu W, Zhang L, Xuan K, Hu C, Li L, Zhang Y, Jin F, Jin Y. Alkaline Phosphatase Controls Lineage Switching of Mesenchymal Stem Cells by Regulating the LRP6/GSK3β Complex in Hypophosphatasia. Am J Cancer Res 2018; 8:5575-5592. [PMID: 30555565 PMCID: PMC6276305 DOI: 10.7150/thno.27372] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 09/18/2018] [Indexed: 01/17/2023] Open
Abstract
Lineage differentiation of bone marrow mesenchymal stem cells (BMMSCs) is the key to bone-fat reciprocity in bone marrow. To date, the regulators of BMMSC lineage switching have all been identified to be transcription factors, and researchers have not determined whether other genes control this process. This study aims to reveal a previously unknown role of tissue-nonspecific alkaline phosphatase (TNSALP) in controlling BMMSC lineage selection. Methods: We compared the characteristics of cultured BMMSCs from patients with hypophosphatasia (HPP), which is caused by mutations in the liver/bone/kidney alkaline phosphatase (ALPL) gene, and an ALPL knockout (ko) mouse model. We performed ALPL downregulation and overexpression experiments to investigate the regulatory role of ALPL in BMMSC lineage switching. Using the PathScan array, coimmunoprecipitation experiments and pathway-guided small molecule treatments, we explored the possible mechanism underlying the regulatory effects of ALPL on cell differentiation and evaluated its therapeutic effect on ALPL ko mice. Results: BMMSCs from both patients with HPP and ALPL ko mice exhibited defective lineage differentiation, including a decrease in osteogenic differentiation and a parallel increase in adipogenic differentiation. Mechanistically, TNSALP directly interacted with LRP6 and regulated the phosphorylation of GSK3β, subsequently resulting in lineage switching of BMMSCs. Re-phosphorylation of GSK3β induced by LiCl treatment restored differentiation of BMMSCs and attenuated skeletal deformities in Alpl+/- mice. Conclusion: Based on our findings, TNSALP acts as a signal regulator to control lineage switching of BMMSCs by regulating the LRP6/GSK3β cascade.
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Cytometric analysis of adipose tissue reveals increments of adipocyte progenitor cells after weight loss induced by bariatric surgery. Sci Rep 2018; 8:15203. [PMID: 30315279 PMCID: PMC6185966 DOI: 10.1038/s41598-018-33488-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 09/27/2018] [Indexed: 12/14/2022] Open
Abstract
Obesity-related comorbidities are, in large part, originated from the dysfunction of adipose tissue. Most of them revert after the normalization of body mass. Adipose tissue is essentially occupied by adipocytes. However, different populations of immunological cells and adipocyte precursor cells (AdPCs) are the main cellular components of tissue. During obesity, body fat depots acquire a low-level chronic inflammation and adipocytes increase in number and volume. Conversely, weight loss improves the inflammatory phenotype of adipose tissue immune cells and reduces the volume of adipocytes. Nevertheless, very little is known about the evolution of the human AdPCs reservoir. We have developed a flow cytometry-based methodology to simultaneously quantify the main cell populations of adipose tissue. Starting from this technical approach, we have studied human adipose tissue samples (visceral and subcutaneous) obtained at two different physiological situations: at morbid obesity and after bariatric surgery-induced weight loss. We report a considerable increase of the AdPCs reservoir after losing weight and several changes in the immune cells populations of adipose tissue (mast cells increase, neutrophils decrease and macrophages switch phenotype). No changes were observed for T-lymphocytes, which are discussed in the context of recent findings.
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Liu W, Zhang L, Xuan K, Hu C, Liu S, Liao L, Li B, Jin F, Shi S, Jin Y. Alpl prevents bone ageing sensitivity by specifically regulating senescence and differentiation in mesenchymal stem cells. Bone Res 2018; 6:27. [PMID: 30210899 PMCID: PMC6131243 DOI: 10.1038/s41413-018-0029-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 06/16/2018] [Accepted: 07/09/2018] [Indexed: 12/21/2022] Open
Abstract
Mutations in the liver/bone/kidney alkaline phosphatase (Alpl) gene cause hypophosphatasia (HPP) and early-onset bone dysplasia, suggesting that this gene is a key factor in human bone development. However, how and where Alpl acts in bone ageing is largely unknown. Here, we determined that ablation of Alpl induces prototypical premature bone ageing characteristics, including bone mass loss and marrow fat gain coupled with elevated expression of p16INK4A (p16) and p53 due to senescence and impaired differentiation in mesenchymal stem cells (MSCs). Mechanistically, Alpl deficiency in MSCs enhances ATP release and reduces ATP hydrolysis. Then, the excessive extracellular ATP is, in turn, internalized by MSCs and causes an elevation in the intracellular ATP level, which consequently inactivates the AMPKα pathway and contributes to the cell fate switch of MSCs. Reactivating AMPKα by metformin treatment successfully prevents premature bone ageing in Alpl+/- mice by improving the function of endogenous MSCs. These results identify a previously unknown role of Alpl in the regulation of ATP-mediated AMPKα alterations that maintain MSC stemness and prevent bone ageing and show that metformin offers a potential therapeutic option.
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Affiliation(s)
- Wenjia Liu
- MS-State Key Laboratory & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, Fourth Military Medical University, Xi’an, China
- Xi’an Institute of Tissue Engineering and Regenerative Medicine, Xi’an, China
| | - Liqiang Zhang
- MS-State Key Laboratory & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, Fourth Military Medical University, Xi’an, China
- Xi’an Institute of Tissue Engineering and Regenerative Medicine, Xi’an, China
| | - Kun Xuan
- MS-State Key Laboratory & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Chenghu Hu
- Xi’an Institute of Tissue Engineering and Regenerative Medicine, Xi’an, China
| | - Shiyu Liu
- MS-State Key Laboratory & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Li Liao
- Xi’an Institute of Tissue Engineering and Regenerative Medicine, Xi’an, China
| | - Bei Li
- MS-State Key Laboratory & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Fang Jin
- MS-State Key Laboratory & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, Fourth Military Medical University, Xi’an, China
| | - Songtao Shi
- Department of Anatomy and Cell Biology, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA USA
| | - Yan Jin
- MS-State Key Laboratory & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, Fourth Military Medical University, Xi’an, China
- Xi’an Institute of Tissue Engineering and Regenerative Medicine, Xi’an, China
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13
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Global phenotypic characterisation of human platelet lysate expanded MSCs by high-throughput flow cytometry. Sci Rep 2018; 8:3907. [PMID: 29500387 PMCID: PMC5834600 DOI: 10.1038/s41598-018-22326-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 02/21/2018] [Indexed: 02/07/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) are a promising cell source to develop cell therapy for many diseases. Human platelet lysate (PLT) is increasingly used as an alternative to foetal calf serum (FCS) for clinical-scale MSC production. To date, the global surface protein expression of PLT-expended MSCs (MSC-PLT) is not known. To investigate this, paired MSC-PLT and MSC-FCS were analysed in parallel using high-throughput flow cytometry for the expression of 356 cell surface proteins. MSC-PLT showed differential surface protein expression compared to their MSC-FCS counterpart. Higher percentage of positive cells was observed in MSC-PLT for 48 surface proteins, of which 13 were significantly enriched on MSC-PLT. This finding was validated using multiparameter flow cytometry and further confirmed by quantitative staining intensity analysis. The enriched surface proteins are relevant to increased proliferation and migration capacity, as well as enhanced chondrogenic and osteogenic differentiation properties. In silico network analysis revealed that these enriched surface proteins are involved in three distinct networks that are associated with inflammatory responses, carbohydrate metabolism and cellular motility. This is the first study reporting differential cell surface protein expression between MSC-PLT and MSC-FSC. Further studies are required to uncover the impact of those enriched proteins on biological functions of MSC-PLT.
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Wiegner R, Rudhart NE, Barth E, Gebhard F, Lampl L, Huber-Lang MS, Brenner RE. Mesenchymal stem cells in peripheral blood of severely injured patients. Eur J Trauma Emerg Surg 2017; 44:627-636. [PMID: 28986662 DOI: 10.1007/s00068-017-0849-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 09/25/2017] [Indexed: 12/15/2022]
Abstract
PURPOSE Mesenchymal stem cells (MSCs) are primarily stromal cells present in bone marrow and other tissues that are crucial for tissue regeneration and can be mobilized into peripheral blood after different types of organ damage. However, little is known about MSC appearance in blood in the setting of polytrauma. METHODS We conducted a monocentered and longitudinal observational clinical study in 11 polytraumatized patients with an injury severity score (ISS) ≥ 24 to determine the numbers of MSCs in peripheral blood. Blood was collected from healthy volunteers and patients after polytrauma in the emergency room and 4, 12, 24, 48 h, 5 and 10 day later, and cells carrying MSC-surface markers (negative for CD45, positive for CD29, CD73, CD90, CD105, and CD166 in different combinations also employing the more stringent markers STRO1 and MSCA1) were detected and characterized using flow cytometry. Relative numbers of MSC-like cells were correlated with clinical parameters to evaluate if specific injury patterns had an influence on their presence in the blood cell pool. RESULTS We were able to detect MSC marker-positive cells in both cohorts; however, the percentage of those cells present in the blood of patients during the first 10 day after injury was mostly similar to healthy volunteers, and significantly lowers starting at 4 h post trauma for one marker combination when compared to controls. Furthermore, the presence of a pelvis fracture was partly correlated with reduced relative numbers of MSC-like cells detectable in blood. CONCLUSIONS Polytrauma in humans was associated with partly reduced relative numbers of MSC-like cells detected in peripheral blood in the time course after injury. Further studies need to define if this reduction was due to lower mobilization from the bone marrow or to active migration to the sites of injury.
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Affiliation(s)
- R Wiegner
- Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, 89081, Ulm, Germany
| | - N-E Rudhart
- Department of Orthopedics, Division for Biochemistry of Joint and Connective Tissue Diseases, University of Ulm, Oberer Eselsberg 45, 89081, Ulm, Germany
| | - E Barth
- Department of Anesthesiology, University Hospital of Ulm, 89081, Ulm, Germany
| | - F Gebhard
- Department of Orthopedic Trauma, Hand-, Plastic- and Reconstructive Surgery, University Hospital of Ulm, 89081, Ulm, Germany
| | - L Lampl
- Department of Anesthesiology, Military Hospital Ulm, 89081, Ulm, Germany
| | - M S Huber-Lang
- Institute of Clinical and Experimental Trauma Immunology, University Hospital Ulm, 89081, Ulm, Germany
| | - R E Brenner
- Department of Orthopedics, Division for Biochemistry of Joint and Connective Tissue Diseases, University of Ulm, Oberer Eselsberg 45, 89081, Ulm, Germany.
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15
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Fakhry M, Roszkowska M, Briolay A, Bougault C, Guignandon A, Diaz-Hernandez JI, Diaz-Hernandez M, Pikula S, Buchet R, Hamade E, Badran B, Bessueille L, Magne D. TNAP stimulates vascular smooth muscle cell trans-differentiation into chondrocytes through calcium deposition and BMP-2 activation: Possible implication in atherosclerotic plaque stability. Biochim Biophys Acta Mol Basis Dis 2016; 1863:643-653. [PMID: 27932058 DOI: 10.1016/j.bbadis.2016.12.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 11/12/2016] [Accepted: 12/04/2016] [Indexed: 01/15/2023]
Abstract
Atherosclerotic plaque calcification varies from early, diffuse microcalcifications to a bone-like tissue formed by endochondral ossification. Recently, a paradigm has emerged suggesting that if the bone metaplasia stabilizes the plaques, microcalcifications are harmful. Tissue-nonspecific alkaline phosphatase (TNAP), an ectoenzyme necessary for mineralization by its ability to hydrolyze inorganic pyrophosphate (PPi), is stimulated by inflammation in vascular smooth muscle cells (VSMCs). Our objective was to determine the role of TNAP in trans-differentiation of VSMCs and calcification. In rodent MOVAS and A7R5 VSMCs, addition of exogenous alkaline phosphatase (AP) or TNAP overexpression was sufficient to stimulate the expression of several chondrocyte markers and induce mineralization. Addition of exogenous AP to human mesenchymal stem cells cultured in pellets also stimulated chondrogenesis. Moreover, TNAP inhibition with levamisole in mouse primary chondrocytes dropped mineralization as well as the expression of chondrocyte markers. VSMCs trans-differentiated into chondrocyte-like cells, as well as primary chondrocytes, used TNAP to hydrolyze PPi, and PPi provoked the same effects as TNAP inhibition in primary chondrocytes. Interestingly, apatite crystals, associated or not to collagen, mimicked the effects of TNAP on VSMC trans-differentiation. AP and apatite crystals increased the expression of BMP-2 in VSMCs, and TNAP inhibition reduced BMP-2 levels in chondrocytes. Finally, the BMP-2 inhibitor noggin blocked the rise in aggrecan induced by AP in VSMCs, suggesting that TNAP induction in VSMCs triggers calcification, which stimulates chondrogenesis through BMP-2. Endochondral ossification in atherosclerotic plaques may therefore be induced by crystals, probably to confer stability to plaques with microcalcifications.
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Affiliation(s)
- Maya Fakhry
- Univ Lyon, University Lyon 1, ICBMS, UMR CNRS 5246, F-69622 Lyon, France; Lebanese University, Laboratory of Cancer Biology and Molecular Immunology, EDST-PRASE, Hadath-Beirut, Lebanon
| | - Monika Roszkowska
- Univ Lyon, University Lyon 1, ICBMS, UMR CNRS 5246, F-69622 Lyon, France; Laboratory of Biochemistry of Lipids, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - Anne Briolay
- Univ Lyon, University Lyon 1, ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - Carole Bougault
- Univ Lyon, University Lyon 1, ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - Alain Guignandon
- Univ Lyon, Université Jean Monnet Saint-Etienne, LBTO, UMR INSERM 1059, F-42023 Saint-Etienne, France
| | - Juan Ignacio Diaz-Hernandez
- Universidad Complutense de Madrid, Facultad de Veterinaria, Dpt. Bioquimica y Biologia Molecular IV, Madrid, Spain
| | - Miguel Diaz-Hernandez
- Universidad Complutense de Madrid, Facultad de Veterinaria, Dpt. Bioquimica y Biologia Molecular IV, Madrid, Spain
| | - Slawomir Pikula
- Laboratory of Biochemistry of Lipids, Department of Biochemistry, Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland
| | - René Buchet
- Univ Lyon, University Lyon 1, ICBMS, UMR CNRS 5246, F-69622 Lyon, France
| | - Eva Hamade
- Lebanese University, Laboratory of Cancer Biology and Molecular Immunology, EDST-PRASE, Hadath-Beirut, Lebanon
| | - Bassam Badran
- Lebanese University, Laboratory of Cancer Biology and Molecular Immunology, EDST-PRASE, Hadath-Beirut, Lebanon
| | | | - David Magne
- Univ Lyon, University Lyon 1, ICBMS, UMR CNRS 5246, F-69622 Lyon, France.
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Skog MS, Nystedt J, Korhonen M, Anderson H, Lehti TA, Pajunen MI, Finne J. Expression of neural cell adhesion molecule and polysialic acid in human bone marrow-derived mesenchymal stromal cells. Stem Cell Res Ther 2016; 7:113. [PMID: 27528376 PMCID: PMC4986182 DOI: 10.1186/s13287-016-0373-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 06/28/2016] [Accepted: 07/21/2016] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND In order to develop novel clinical applications and to gain insights into possible therapeutic mechanisms, detailed molecular characterization of human bone marrow-derived mesenchymal stromal cells (hBM-MSCs) is needed. Neural cell adhesion molecule (NCAM, CD56) is a transmembrane glycoprotein modulating cell-cell and cell-matrix interactions. An additional post-translational modification of NCAM is the α2,8-linked polysialic acid (polySia). Because of its background, NCAM is often considered a marker of neural lineage commitment. Generally, hBM-MSCs are considered to be devoid of NCAM expression, but more rigorous characterization is needed. METHODS We have studied NCAM and polySia expression in five hBM-MSC lines at mRNA and protein levels. Cell surface localization was confirmed by immunofluorescence staining and expression frequency in the donor-specific lines by flow cytometry. For the detection of poorly immunogenic polySia, a fluorochrome-tagged catalytically defective enzyme was employed. RESULTS All five known NCAM isoforms are expressed in these cells at mRNA level and the three main isoforms are present at protein level. Both polysialyltransferases, generally responsible for NCAM polysialylation, are expressed at mRNA level, but only very few cells express polySia at the cell surface. CONCLUSIONS Our results underline the need for a careful control of methods and conditions in the characterization of MSCs. This study shows that, against the generally held view, clinical-grade hBM-MSCs do express NCAM. In contrast, although both polysialyltransferase genes are transcribed in these cells, very few express polySia at the cell surface. NCAM and polySia represent new candidate molecules for influencing MSC interactions.
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Affiliation(s)
- Maria S Skog
- Biochemistry and Biotechnology, Department of Biosciences, University of Helsinki, P.O. Box 56, FI-00014, Helsinki, Finland.
| | - Johanna Nystedt
- Cell Therapy Services, Finnish Red Cross Blood Service, Kivihaantie 7, FI-00310, Helsinki, Finland
| | - Matti Korhonen
- Cell Therapy Services, Finnish Red Cross Blood Service, Kivihaantie 7, FI-00310, Helsinki, Finland
| | - Heidi Anderson
- Biochemistry and Biotechnology, Department of Biosciences, University of Helsinki, P.O. Box 56, FI-00014, Helsinki, Finland.,Present Address: Genoscoper Laboratories Oy, P.O. Box 1040, FI-00251, Helsinki, Finland
| | - Timo A Lehti
- Biochemistry and Biotechnology, Department of Biosciences, University of Helsinki, P.O. Box 56, FI-00014, Helsinki, Finland
| | - Maria I Pajunen
- Biochemistry and Biotechnology, Department of Biosciences, University of Helsinki, P.O. Box 56, FI-00014, Helsinki, Finland.,Present Address: Department of Bacteriology and Immunology, Medicum, Research Programs Unit, Immunobiology, University of Helsinki, P.O. Box 21, FI-00014, Helsinki, Finland
| | - Jukka Finne
- Biochemistry and Biotechnology, Department of Biosciences, University of Helsinki, P.O. Box 56, FI-00014, Helsinki, Finland
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