bims-supasi 2024-02-25 papers

bims-supasi

Biomed News

on Sulfation pathways and signalling

Issue of 2024‒02‒25
eighteen papers selected by
Jonathan Wolf Mueller, University of Birmingham

Sulfated Glycans Inhibit the Interaction of MERS-CoV Receptor Binding Domain with Heparin.
Multivalent, calcium-independent binding of surfactant protein A and D to sulfated glycosaminoglycans of the alveolar epithelial glycocalyx.
Improving impact of heparan sulfate on the endothelial glycocalyx abnormalities in atherosclerosis as revealed by glycan-protein interactome.
Structure and Binding Properties to Blood Co-Factors of the Least Sulfated Galactan Found in the Cell Wall of the Red Alga Botryocladia occidentalis.
Plasma-treated collagen functionalized with chondroitin sulfate as bioactive and nanostructured extracellular matrix mimics.
Tendon stem cells seeded on dynamic chondroitin sulfate and chitosan hydrogel scaffold with BMP2 enhance tendon-to-bone healing.
The Multienzyme Complex Nature of Dehydroepiandrosterone Sulfate Biosynthesis.
Efficient Expression and Characterization of an Endo-Type Lyase HCLase_M28 and Its Gradual Scale-Up Fermentation for the Preparation of Chondroitin Sulfate Oligosaccharides.
GlcNAc6ST2/CHST4 Is Essential for the Synthesis of R-10G-Reactive Keratan Sulfate/Sulfated N-Acetyllactosamine Oligosaccharides in Mouse Pleural Mesothelium.
AST-120 improved uremic pruritus by lowering indoxyl sulfate and inflammatory cytokines in hemodialysis patients.
Heparin Specifically Inhibits CRISPR/Cas12 Activation, Enabling Ultrasensitive Heparin Detection and Gene Editing Regulation.
Enhanced SLC35B2/SAV1 sulfation axis promotes tumor growth through inhibiting Hippo signaling in hepatocellular carcinoma.
Evaluation of the Recombinant Bacterial Chitinases as Anti-proliferative and Anti-migratory Agents for the Human Breast Cancer Cell Line, MCF-7.
Placental mRNA Expression of Neurokinin B Is Increased in PCOS Pregnancies with Female Offspring.
Dual-Targeting Macrophages and Hepatic Stellate Cells by Modified Albumin Nanoparticles for Liver Cirrhosis Treatment.
Keratan sulfate, an electrosensory neurosentient bioresponsive cell instructive glycosaminoglycan.
Relationship between Serum Indoxyl Sulfate and Klotho Protein and Vascular Calcification in Patients with Chronic Kidney Disease Stages 3-5.
Prevention of experimental autoimmune encephalomyelitis by targeting 6-sulfo sialyl Lewis X glycans involved in lymphocyte homing.

Viruses. 2024 Feb 02. pii: 237. [Epub ahead of print]16(2):

Sulfated Glycans Inhibit the Interaction of MERS-CoV Receptor Binding Domain with Heparin.

Jiyuan Yang, Yuefan Song, Weihua Jin, Ke Xia, Grace C Burnett, Wanjin Qiao, John T Bates, Vitor H Pomin, Chunyu Wang, Mingqiang Qiao, Robert J Linhardt, Jonathan S Dordick, Fuming Zhang.

  Middle East respiratory syndrome coronavirus (MERS-CoV) is a zoonotic virus with high contagion and mortality rates. Heparan sulfate proteoglycans (HSPGs) are ubiquitously expressed on the surface of mammalian cells. Owing to its high negatively charged property, heparan sulfate (HS) on the surface of host cells is used by many viruses as cofactor to facilitate viral attachment and initiate cellular entry. Therefore, inhibition of the interaction between viruses and HS could be a promising target to inhibit viral infection. In the current study, the interaction between the receptor-binding domain (RBD) of MERS-CoV and heparin was exploited to assess the inhibitory activity of various sulfated glycans such as glycosaminoglycans, marine-sourced glycans (sulfated fucans, fucosylated chondroitin sulfates, fucoidans, and rhamnan sulfate), pentosan polysulfate, and mucopolysaccharide using Surface Plasmon Resonance. We believe this study provides valuable insights for the development of sulfated glycan-based inhibitors as potential antiviral agents.

Keywords:  HSPGs; MERS-CoV; heparin; sulfated glycans; surface plasmon resonance

DOI:  https://doi.org/10.3390/v16020237
Am J Physiol Lung Cell Mol Physiol. 2024 Feb 20.

Multivalent, calcium-independent binding of surfactant protein A and D to sulfated glycosaminoglycans of the alveolar epithelial glycocalyx.

Rabia Avcibas, Anna Vermul, Vladimir Gluhovic, Nico Boback, Raquel Arroyo, Paul S Kingma, Miriam Isasi-Campillo, Lucia Garcia-Ortega, Matthias Griese, Wolfgang M Kuebler, Matthias Ochs, Daniel Lauster, Elena Lopez-Rodriguez.

  Lung surfactant collectins, surfactant protein A (SP-A) and D (SP-D), are oligomeric C-type lectins involved in lung immunity. Through their carbohydrate recognition domain, they recognize carbohydrates at pathogen surfaces and initiate lung innate immune response. Here, we propose that they may also be able to bind to other carbohydrates present in typical cell surfaces, such as the alveolar epithelial glycocalyx. To test this hypothesis, we analyzed and quantified the binding affinity of SP-A and SP-D to different sugars and glycosaminoglycans (GAGs) by microscale thermophoresis (MST). In addition, by changing the calcium concentration, we aimed to characterize any consequences on the binding behavior. Our results show that both oligomeric proteins bind with high affinity (in nanomolar range) to GAGs, such as hyaluronan (HA), heparan sulfate (HS) and chondroitin sulfate (CS). Binding to HS and CS was calcium-independent, as it was not affected by changing calcium concentration in the buffer. Quantification of GAGs in bronchoalveolar lavage (BAL) fluid from animals deficient in either SP-A or SP-D, showed changes in GAG composition, and electron micrographs showed differences in alveolar glycocalyx ultrastructure in vivo. Taken together, SP-A and SP-D bind to model sulfated glycosaminoglycans of the alveolar epithelial glycocalyx in a multivalent and calcium independent way. These findings provide a potential mechanism for SP-A and SP-D as an integral part of the alveolar epithelial glycocalyx binding and interconnecting free GAGs, proteoglycans and other glycans in glycoproteins, which may influence its glycocalyx composition and structure.

Keywords:  alveolar epithelial glycocalyx; glycosaminoglycan; lung collectins; lung surfactant

DOI:  https://doi.org/10.1152/ajplung.00283.2023
Carbohydr Polym. 2024 Apr 15. pii: S0144-8617(24)00060-2. [Epub ahead of print]330 121834

Improving impact of heparan sulfate on the endothelial glycocalyx abnormalities in atherosclerosis as revealed by glycan-protein interactome.

Qingqing Chen, Xiaohui Xu, Shaoshuai Xie, Anran Sheng, Naihan Han, Zhenyu Tian, Xiaowei Wang, Fuchuan Li, Robert J Linhardt, Fuming Zhang, Lan Jin, Qunye Zhang, Lianli Chi.

  Endothelial dysfunction induced by oxidative stress is an early predictor of atherosclerosis, which can cause various cardiovascular diseases. The glycocalyx layer on the endothelial cell surface acts as a barrier to maintain endothelial biological function, and it can be impaired by oxidative stress. However, the mechanism of glycocalyx damage during the development of atherosclerosis remains largely unclear. Herein, we established a novel strategy to address these issues from the glycomic perspective that has long been neglected. Using countercharged fluorescence protein staining and quantitative mass spectrometry, we found that heparan sulfate, a major component of the glycocalyx, was structurally altered by oxidative stress. Comparative proteomics and protein microarray analysis revealed several new heparan sulfate-binding proteins, among which alpha-2-Heremans-Schmid glycoprotein (AHSG) was identified as a critical protein. The molecular mechanism of AHSG with heparin was characterized through several methods. A heparan analog could relieve atherosclerosis by protecting heparan sulfate from degradation during oxidative stress and by reducing the accumulation of AHSG at lesion sites. In the present study, the molecular mechanism of anti-atherosclerotic effect of heparin through interaction with AHSG was revealed. These findings provide new insights into understanding of glycocalyx damage in atherosclerosis and lead to the development of corresponding therapeutics.

Keywords:  Atherosclerosis; Glycan-protein interactome; Glycocalyx; Heparan sulfate; Heparin

DOI:  https://doi.org/10.1016/j.carbpol.2024.121834
Mar Drugs. 2024 Feb 09. pii: 81. [Epub ahead of print]22(2):

Structure and Binding Properties to Blood Co-Factors of the Least Sulfated Galactan Found in the Cell Wall of the Red Alga Botryocladia occidentalis.

Antim K Maurya, Hoda Al Ahmed, Anderson DeWitt, Anter A Shami, Sandeep K Misra, Vitor H Pomin.

  Three different populations of sulfated polysaccharides can be found in the cell wall of the red alga Botryocladia occidentalis. In a previous work, the structures of the two more sulfated polysaccharides were revised. In this work, NMR-based structural analysis was performed on the least sulfated polysaccharide and its chemically modified derivatives. Results have revealed the presence of both 4-linked α- and 3-linked β-galactose units having the following chemical features: more than half of the total galactose units are not sulfated, the α-units occur primarily as 3,6-anhydrogalactose units either 2-O-methylated or 2-O-sulfated, and the β-galactose units can be 4-O-sulfated or 2,4-O-disulfated. SPR-based results indicated weaker binding of the least sulfated galactan to thrombin, factor Xa, and antithrombin, but stronger binding to heparin cofactor II than unfractionated heparin. This report together with our previous publication completes the structural characterization of the three polysaccharides found in the cell wall of the red alga B. occidentalis and correlates the impact of their composing chemical groups with the levels of interaction with the blood co-factors.

Keywords:  Botryocladia occidentalis; NMR; SPR; blood co-factors; seaweed; sulfated galactan

DOI:  https://doi.org/10.3390/md22020081
Nanomedicine (Lond). 2024 Feb 22.

Plasma-treated collagen functionalized with chondroitin sulfate as bioactive and nanostructured extracellular matrix mimics.

Federica Barbugian, Francesca Cadamuro, Francesco Nicotra, Claudia Riccardi, Laura Russo.

  Aim: Cell microenvironment contains a plethora of information that influences cell modulation. Indeed, the extracellular matrix plays a central role in tissue development. Reproducing the cell-extracellular matrix crosstalk able to recapitulate both physical and biochemical signals is crucial to obtain functional tissue models or regenerative strategies. Materials & methods: Here, a combined method is proposed to easily functionalize collagen surface films, tailoring morphological properties. Oxygen nonthermal plasma treatment and glyco-conjugation with chondroitin sulfate are used to modify surface properties. Results: It results in higher adhesion, proliferation and morphological organization of U87 glioblastoma cells. Conclusion: Our finding suggests new promising strategies for the development of collagen-based biomaterials, which can be employed for advanced in vitro models.

Keywords:  ECM mimic; biomaterials; chondroitin sulfate; collagen; glycans; plasma

DOI:  https://doi.org/10.2217/nnm-2023-0310
Heliyon. 2024 Feb 29. 10(4): e25206

Tendon stem cells seeded on dynamic chondroitin sulfate and chitosan hydrogel scaffold with BMP2 enhance tendon-to-bone healing.

Qingsong Zhang, Huawei Wen, Guangyang Liao, Xianhua Cai.

  Failure to adequately reconstruct the tendon-to-bone interface constitutes the primary etiology underlying rotator cuff retear after surgery. The purpose of this study is to construct a dynamic chondroitin sulfate and chitosan hydrogel scaffold (CHS) with bone morphogenetic protein 2 (BMP2), then seed tendon stem cells (TSCs) on BMP2-CHS for the rotator cuff reconstruction of tendon-to-bone interface. In this dynamic hydrogel system, the scaffold could not only have good biocompatibility and degradability but also significantly promote the proliferation and differentiation of TSCs. The ability of BMP2-CHS combined with TSCs to promote regeneration of tendon-to-bone interface was further verified in the rabbit rotator cuff tear model. The results showed that BMP2-CHS combined with TSCs could induce considerable collagen, fibrocartilage, and bone arrangement and growth at the tendon-to-bone interface and promote the biomechanical properties. Overall, TSCs seeded on CHS with BMP2 can enhance tendon-to-bone healing and provide a new possibility for improving the poor prognosis of rotator cuff surgery.

Keywords:  BMP2; Chitosan; Chondroitin sulfate; Tendon stem cells; Tendon-to-bone healing

DOI:  https://doi.org/10.1016/j.heliyon.2024.e25206
Int J Mol Sci. 2024 Feb 08. pii: 2072. [Epub ahead of print]25(4):

The Multienzyme Complex Nature of Dehydroepiandrosterone Sulfate Biosynthesis.

Anastasiya Tumilovich, Evgeniy Yablokov, Yuri Mezentsev, Pavel Ershov, Viktoriia Basina, Oksana Gnedenko, Leonid Kaluzhskiy, Tatsiana Tsybruk, Irina Grabovec, Maryia Kisel, Polina Shabunya, Natalia Soloveva, Nikita Vavilov, Andrei Gilep, Alexis Ivanov.

  Dehydroepiandrosterone (DHEA), a precursor of steroid sex hormones, is synthesized by steroid 17-alpha-hydroxylase/17,20-lyase (CYP17A1) with the participation of microsomal cytochrome b5 (CYB5A) and cytochrome P450 reductase (CPR), followed by sulfation by two cytosolic sulfotransferases, SULT1E1 and SULT2A1, for storage and transport to tissues in which its synthesis is not available. The involvement of CYP17A1 and SULTs in these successive reactions led us to consider the possible interaction of SULTs with DHEA-producing CYP17A1 and its redox partners. Text mining analysis, protein-protein network analysis, and gene co-expression analysis were performed to determine the relationships between SULTs and microsomal CYP isoforms. For the first time, using surface plasmon resonance, we detected interactions between CYP17A1 and SULT2A1 or SULT1E1. SULTs also interacted with CYB5A and CPR. The interaction parameters of SULT2A1/CYP17A1 and SULT2A1/CYB5A complexes seemed to be modulated by 3'-phosphoadenosine-5'-phosphosulfate (PAPS). Affinity purification, combined with mass spectrometry (AP-MS), allowed us to identify a spectrum of SULT1E1 potential protein partners, including CYB5A. We showed that the enzymatic activity of SULTs increased in the presence of only CYP17A1 or CYP17A1 and CYB5A mixture. The structures of CYP17A1/SULT1E1 and CYB5A/SULT1E1 complexes were predicted. Our data provide novel fundamental information about the organization of microsomal CYP-dependent macromolecular complexes.

Keywords:  DHEA; cytochrome P450; cytochrome b5; cytosolic sulfotransferase; enzymatic assay; in silico modeling; monooxygenase system; steroidogenesis; surface plasmon resonance; text mining

DOI:  https://doi.org/10.3390/ijms25042072
Appl Biochem Biotechnol. 2024 Feb 22.

Efficient Expression and Characterization of an Endo-Type Lyase HCLase_M28 and Its Gradual Scale-Up Fermentation for the Preparation of Chondroitin Sulfate Oligosaccharides.

Ruibao Ju, Baoqin Han, Feng Han, Yanfei Peng.

  Glycosaminoglycan (GAG) lyases have been critical in structural and functional studies of GAGs. HCLase_M28, a lyase identified from the genome of Microbacterium sp. M28 was heterologously expressed, enzymatically characterized, and prepared in large-scale fermentation for the production of chondroitin sulfate (CS) oligosaccharides. Results showed that the expression of HCLase_M28 in Escherichia coli BL21 (DE3)-pET24a-HCLase_M28opt1 and Bacillus subtilis W800-pSTOP1622-HCLase_M28opt2 were 108-fold and 25-fold that of wide strain. The optimal lytic reaction of HCLase_M28 happened in 20 mM Tris-HCl (pH 7.2) at 50 °C with a specific activity of 190.9 U/mg toward CS-A. The degrading activity was slightly simulated in presence of 1 mM Ca2+ and Mn2+ while severely inhibited by Hg+, Cu2+, Fe3+, and SDS. TLC and ESI-MS analysis proved HCLase_M28 was an endolytic lyase and degraded CS and hyaluronic acid into unsaturated disaccharides. Through a gradual scale-up of fermentation in 5 L, 100 L, and 1000 L, a highly efficient intracellular expression of HCLase_M28 with an activity of 3.88 × 105 U/L achieved within a 34 h of cultivation. Through ultrafiltration, CS oligosaccharides with DP of 2 to 8 as the main components could be controllably prepared. The successful large-scale fermentation made HCLase_M28 a promising enzyme for industrial production of CS oligosaccharides.

Keywords:  Glycosaminoglycan lyase; Heterologous expression; Large-scale fermentation; Oligosaccharides

DOI:  https://doi.org/10.1007/s12010-024-04878-7
Molecules. 2024 Feb 07. pii: 764. [Epub ahead of print]29(4):

GlcNAc6ST2/CHST4 Is Essential for the Synthesis of R-10G-Reactive Keratan Sulfate/Sulfated N-Acetyllactosamine Oligosaccharides in Mouse Pleural Mesothelium.

Yoshiko Takeda-Uchimura, Midori Ikezaki, Tomoya O Akama, Yoshito Ihara, Fabrice Allain, Kazuchika Nishitsuji, Kenji Uchimura.

  We recently showed that 6-sulfo sialyl N-acetyllactosamine (LacNAc) in O-linked glycans recognized by the CL40 antibody is abundant in the pleural mesothelium under physiological conditions and that these glycans undergo complementary synthesis by GlcNAc6ST2 (encoded by Chst4) and GlcNAc6ST3 (encoded by Chst5) in mice. GlcNAc6ST3 is essential for the synthesis of R-10G-positive keratan sulfate (KS) in the brain. The predicted minimum epitope of the R-10G antibody is a dimeric asialo 6-sulfo LacNAc. Whether R-10G-reactive KS/sulfated LacNAc oligosaccharides are also present in the pleural mesothelium was unknown. The question of which GlcNAc6STs are responsible for R-10G-reactive glycans was an additional issue to be clarified. Here, we show that R-10G-reactive glycans are as abundant in the pulmonary pleura as CL40-reactive glycans and that GlcNAc6ST3 is only partially involved in the synthesis of these pleural R-10G glycans, unlike in the adult brain. Unexpectedly, GlcNAc6ST2 is essential for the synthesis of R-10G-positive KS/sulfated LacNAc oligosaccharides in the lung pleura. The type of GlcNAc6ST and the magnitude of its contribution to KS glycan synthesis varied among tissues in vivo. We show that GlcNAc6ST2 is required and sufficient for R-10G-reactive KS synthesis in the lung pleura. Interestingly, R-10G immunoreactivity in KSGal6ST (encoded by Chst1) and C6ST1 (encoded by Chst3) double-deficient mouse lungs was markedly increased. MUC16, a mucin molecule, was shown to be a candidate carrier protein for pleural R-10G-reactive glycans. These results suggest that R-10G-reactive KS/sulfated LacNAc oligosaccharides may play a role in mesothelial cell proliferation and differentiation. Further elucidation of the functions of sulfated glycans synthesized by GlcNAc6ST2 and GlcNAc6ST3, such as R-10G and CL40 glycans, in pathological conditions may lead to a better understanding of the underlying mechanisms of the physiopathology of the lung mesothelium.

Keywords:  MUC16; keratan sulfate; mesothelium; sialomucin; sulfotransferase

DOI:  https://doi.org/10.3390/molecules29040764
Aging (Albany NY). 2024 Feb 21. 16

AST-120 improved uremic pruritus by lowering indoxyl sulfate and inflammatory cytokines in hemodialysis patients.

Chia-Chao Wu, Ya-Chung Tian, Chien-Lin Lu, Ming-Ju Wu, Paik-Seong Lim, Yi-Wen Chiu, Ko-Lin Kuo, Shou-Hsuan Liu, Yu-Ching Chou, Chien-An Sun, Yi-Chou Hou, Kuo-Cheng Lu.

  BACKGROUND AND HYPOTHESIS: Pruritus is a common and distressing symptom that affects patients with chronic kidney disease. The concentration of protein bounded uremic toxin was associated with the uremic pruritus. The aim is to assess the efficacy of AST-120 for uremic pruritus in hemodialysis patients.MATERIALS AND METHODS: The participants were enrolled and then divided into the AST-120 treatment group and control group with a ratio of 2:1. All participants underwent pre-observation screenings two weeks before the study with three visits. In the treatment phase (week 1 to week 4), the treatment group added 6g/day of AST-120 along with routine anti-pruritic treatment. Visual analog scale (VAS) and biochemical parameters were measured.
RESULTS: The VAS score began to be lower in the AST-120 treatment group after the 5th visiting (p < 0.05). The reduction in indoxyl sulfate (IS) at 5th week along with TNF-alpha. The reduction ratio of indoxyl sulfate correlated with reduction of parathyroid hormone.
CONCLUSION: This study has demonstrated that the four-week treatment of AST-120 decreased the severity of uremic pruritus in patients with ESRD. The concentration of IS and TNF-alpha decreased in the AST-120 treatment group. The reduction of iPTH correlated with the reduction of IS in the AST-120 treatment.

Keywords:  AST-120; end-stage renal disease; indoxyl sulfate; protein bounded uremic toxin; uremic pruritus

DOI:  https://doi.org/10.18632/aging.205580
Anal Chem. 2024 Feb 22.

Heparin Specifically Inhibits CRISPR/Cas12 Activation, Enabling Ultrasensitive Heparin Detection and Gene Editing Regulation.

Min Cao, Xinlan Bian, Zhirun Ji, Muhammad Sohail, Fuming Zhang, Robert J Linhardt, Bingzhi Li, Xing Zhang.

Heparin is a highly sulfated linear glycosaminoglycan that is used as an anticoagulant to prevent and treat thrombotic diseases. Herein, we find that heparin specifically inhibits the activation of the Cas12 protein through the competitive binding of heparin and crRNA to Cas12. Studies illustrate that heparin's high molecular weight and strong negative charge are critical parameters for its inhibitory effect. This unexpected finding was engineered for the detection of heparin, affording a low detection limit of 0.36 ng/mL for fluorometric quantification. We further developed a rapid lateral flow-based system named HepaStrip (heparin strip), allowing heparin monitoring in clinical samples within 20 min. Finally, in vivo investigations revealed that heparin can regulate gene editing with the clusters of the regularly spaced short palindromic repeat (CRISPR)/Cas12 system in Escherichia coli. Heparin blocks the formation of Cas12-crRNA ribonucleoprotein, allowing the application of CRISPR for rapid and field-deployable detection of heparin and unleashing the potential use of heparin in future anti-CRISPR applications.

DOI: https://doi.org/10.1021/acs.analchem.4c00403
Hepatology. 2024 Feb 20.

Enhanced SLC35B2/SAV1 sulfation axis promotes tumor growth through inhibiting Hippo signaling in hepatocellular carcinoma.

Bo He, Zhao Huang, Siyuan Qin, Peilan Peng, Xirui Duan, Longqin Wang, Qin Ye, Kui Wang, Jingwen Jiang, Bowen Li, Rui Liu, Canhua Huang.

BACKGROUND AND AIMS: Protein tyrosine sulfation (PTS) is a common post-translational modification that regulates a variety of physiological and pathological processes. However, the role of PTS in cancer remains poorly understood. The goal of this study was to determine whether and how PTS plays a role in HCC progression.APPROACH AND RESULTS: By mass spectrometry and bioinformatics analysis, we identified SAV1 as a novel substrate of PTS in hepatocellular carcinoma (HCC). Oxidative stress upregulates the transcription of SLC35B2, a Golgi-resident transporter of sulfate donor 3'-phosphoadenosine 5'-phosphosulfate, leading to increased sulfation of SAV1. Sulfation of SAV1 disrupts the formation of SAV1-MST1 complex, resulting in a decrease of MST1 phosphorylation and subsequent inactivation of Hippo signaling. These molecular events ultimately foster the growth of HCC cells both in vivo and in vitro. Moreover, SLC35B2 is a novel transcription target gene of the Hippo pathway, constituting a positive feedback loop that facilitates HCC progression under oxidative stress.
CONCLUSIONS: Our findings reveal a regulatory mechanism of SLC35B2/SAV1 sulfation axis in response to oxidative stress, highlighting its potential as a promising therapeutic target for HCC.

DOI: https://doi.org/10.1097/HEP.0000000000000783
Appl Biochem Biotechnol. 2024 Feb 23.

Evaluation of the Recombinant Bacterial Chitinases as Anti-proliferative and Anti-migratory Agents for the Human Breast Cancer Cell Line, MCF-7.

Ankita Shrivastava, Manik Goel, Md Fahim Khalid, Geetika Sharma, Ayush Khandelwal, Disha Sharma, Rinkoo Devi Gupta.

  Chitinases, a glycosyl hydrolase family 18 members, have a wide distribution in both prokaryotes and eukaryotes, including humans. Regardless of the absence of endogenous chitin polymer, various chitinases and chitinase-like proteins (CLPs) have been reported in mammals. However, several other carbohydrate polymers, such as hyaluronic acid and heparan sulfate, show structural similarities with chitin, which could be a potential target of chitinase and CLPs. Heparan sulfate is part of the integral membrane proteins and involves in cell adherence and migration. Hence, to demonstrate the effect of chitinase on cancer cell progression, we selected two chitinases from Serratia marcescens, ChiB and ChiC, which function as exo- and endo-chitinase, respectively. The ChiB and ChiC proteins were produced recombinantly by cloning chiB and chiC genes from Serratia marcescens. The cell viability of the Michigan Cancer Foundation-7 (MCF-7) cells was studied using different concentrations of the purified recombinant proteins. Cell viability assay was performed using 3-(4, 5-dimethyl thiazolyl-2)-2, 5-diphenyltetrazolium bromide and water-soluble tetrazolium salt, and the effect of ChiB and ChiC on cell proliferation was studied by clonogenic assay. The cell migration study was analysed by wound healing, transwell migration, and invasion assays. Cell cycle analysis of propidium iodide-stained cells and cell proliferation markers such as pERK1/2, pAKT, and SMP30 were also done. It was observed that both ChiB and ChiC were able to impede cell viability, cell migration, and invasion significantly. These observations and our in silico molecular docking analysis suggest that ChiC is a potential anticancer agent and is more efficient than ChiB. Since the ChiC is able to inhibit both cancer cell proliferation and migration, it could be a potential candidate for the treatment of metastatic cancer.

Keywords:  Anticancer agent; Chitinase; Chitinase-like proteins; Endo-chitinase; Exo-chitinase; Heparan sulfate

DOI:  https://doi.org/10.1007/s12010-024-04888-5
Biomedicines. 2024 Feb 01. pii: 334. [Epub ahead of print]12(2):

Placental mRNA Expression of Neurokinin B Is Increased in PCOS Pregnancies with Female Offspring.

Georgios K Markantes, Evangelia Panagodimou, Vasiliki Koika, Irene Mamali, Apostolos Kaponis, George Adonakis, Neoklis A Georgopoulos.

  Current research suggests that polycystic ovary syndrome (PCOS) might originate in utero and implicates the placenta in its pathogenesis. Kisspeptin (KISS1) and neurokinin B (NKB) are produced by the placenta in high amounts, and they have been implicated in several pregnancy complications associated with placental dysfunction. However, their placental expression has not been studied in PCOS. We isolated mRNA after delivery from the placentae of 31 PCOS and 37 control women with term, uncomplicated, singleton pregnancies. The expression of KISS1, NKB, and neurokinin receptors 1, 2, and 3 was analyzed with real-time polymerase chain reaction, using β-actin as the reference gene. Maternal serum and umbilical cord levels of total testosterone, sex hormone-binding globulin (SHBG), free androgen index (FAI), androstenedione, dehydroepiandrosterone sulfate (DHEAS), Anti-Mullerian hormone (AMH), and estradiol were also assessed. NKB placental mRNA expression was higher in PCOS women versus controls in pregnancies with female offspring. NKB expression depended on fetal gender, being higher in pregnancies with male fetuses, regardless of PCOS. NKB was positively correlated with umbilical cord FAI and AMH, and KISS1 was positively correlated with cord testosterone and FAI; there was also a strong positive correlation between NKB and KISS1 expression. Women with PCOS had higher serum AMH and FAI and lower SHBG than controls. Our findings indicate that NKB might be involved in the PCOS-related placental dysfunction and warrant further investigation. Studies assessing the placental expression of NKB should take fetal gender into consideration.

Keywords:  kisspeptin (KISS1); neurokinin B (NKB); placenta; placental expression; polycystic ovary syndrome (PCOS); pregnancy

DOI:  https://doi.org/10.3390/biomedicines12020334
ACS Appl Mater Interfaces. 2024 Feb 23.

Dual-Targeting Macrophages and Hepatic Stellate Cells by Modified Albumin Nanoparticles for Liver Cirrhosis Treatment.

Yulu Tan, Zijun Wang, Rui Guo, Xueru Zhou, Wei Zhang, Mengying Wu, Chenqi Guo, Huile Gao, Xun Sun, Zhirong Zhang, Tao Gong.

  Hepatic cirrhosis has become a global public health concern with high mortality and currently lacks effective clinical treatment methods. Activation of hepatic stellate cells (HSCs) and the large number of macrophages infiltrating into the liver play a critical role in the development of liver cirrhosis. This study developed a novel modified nanoparticle system (SRF-CS-PSA NPs) in which Sorafenib (SRF) was encapsulated by palmitic acid-modified albumin (PSA) and further modified with chondroitin sulfate (CS). These modifications enabled the SRF-CS-PSA NPs to effectively target hepatic stellate cells (HSCs) and macrophages. SRF-CS-PSA NPs showed uniform particle size distribution of approximately 120 nm and high loading efficiency of up to 99.5% and can be taken up by HSCs and macrophages via CD44 and SR-A receptors, respectively. In a mouse model of liver cirrhosis, SRF-CS-PSA NPs demonstrated superior targeting and inhibition of HSCs and macrophages, effectively reversing the process of liver cirrhosis. Overall, our study demonstrates the potential of SRF-CS-PSA NPs as a targeted therapy for liver cirrhosis, with promising clinical applications.

Keywords:  chondroitin sulfate; hepatic stellate cells; liver cirrhosis; macrophages; palmitic acid-modified albumin

DOI:  https://doi.org/10.1021/acsami.3c17670
Glycobiology. 2024 Feb 20. pii: cwae014. [Epub ahead of print]

Keratan sulfate, an electrosensory neurosentient bioresponsive cell instructive glycosaminoglycan.

James Melrose.

  The roles of keratan sulfate (KS) as a proton detection glycosaminoglycan in neurosensory processes in the central and peripheral nervous systems is reviewed. The functional properties of the KS-proteoglycans aggrecan, phosphacan, podocalyxcin as components of perineuronal nets in neurosensory processes in neuronal plasticity, cognitive learning and memory are also discussed. KS-glycoconjugate neurosensory gels used in electrolocation in elasmobranch fish species and KS substituted mucin like conjugates in some tissue contexts in mammals need to be considered in sensory signalling. Parallels are drawn between KS's roles in elasmobranch fish neurosensory processes and its roles in mammalian electro mechanical transduction of acoustic liquid displacement signals in the cochlea by the tectorial membrane and stereocilia of sensory inner and outer hair cells into neural signals for sound interpretation. The sophisticated structural and functional proteins which maintain the unique high precision physical properties of stereocilia in the detection, transmittance and interpretation of acoustic signals in the hearing process are important. The maintenance of the material properties of stereocilia are essential in sound transmission processes. Specific, emerging roles for low sulfation KS in sensory bioregulation are contrasted with the properties of high charge density KS isoforms. Some speculations are made on how the molecular and electrical properties of KS may be of potential application in futuristic nanoelectronic, memristor technology in advanced ultrafast computing devices with low energy requirements in nanomachines, nanobots or molecular switches which could be potentially useful in artificial synapse development. Application of KS in such innovative areas in bioregulation are eagerly awaited.

Keywords:  cochlea; electro-mechanotransduction; electrolocation; keratan sulfate; neurosensory processes

DOI:  https://doi.org/10.1093/glycob/cwae014
Int J Endocrinol. 2024 ;2024 8229604

Relationship between Serum Indoxyl Sulfate and Klotho Protein and Vascular Calcification in Patients with Chronic Kidney Disease Stages 3-5.

Yan Gao, Cong-Juan Zhao, Qiang Liu, Chen-Chen Li, Zhe Li, Jing Li, Qian Wang, Li Zhang.

Objective: This study aims to explore the relationships between serum indoxyl sulfate (IS) and Klotho protein levels with vascular calcification in patients with chronic kidney disease (CKD) stages 3-5.Methods: From December 2021 to January 2023, a total of 108 CKD patients in stages 3-5 were enrolled in this cross-sectional investigation. Demographic information and routine clinical biochemistry test results were gathered. Serum levels of IS and Klotho were quantified through enzyme-linked immunosorbent assays. Furthermore, multislice spiral computed tomography was employed to evaluate vascular calcification. The association between serum IS or Klotho levels and abdominal aorta calcification was assessed using univariate analysis and logistic regression analyses.
Results: With the progression of CKD stages, serum creatinine, phosphorus, intact parathyroid hormone (iPTH), serum IS, and abdominal aortic calcification exhibited incremental trends, while serum calcium and Klotho protein levels showed a diminishing trend, with statistically significant differences (P < 0.05). Significant differences were observed in age, blood phosphorus, calcium, total parathyroid hormone, serum IS, and Klotho protein levels between patients with and without aortic calcification (P < 0.05). Logistic regression analysis demonstrated that advanced age, high IS level, and low Klotho protein level were independent risk factors for abdominal aortic calcification in CKD patients (P < 0.05).
Conclusion: This study indicates elevated serum IS levels and decreased Klotho protein levels in CKD patients. High IS level and low Klotho level were independent risk factors for abdominal aortic calcification.

DOI: https://doi.org/10.1155/2024/8229604
Int Immunol. 2024 Feb 22. pii: dxae009. [Epub ahead of print]

Prevention of experimental autoimmune encephalomyelitis by targeting 6-sulfo sialyl Lewis X glycans involved in lymphocyte homing.

Qianqian Liu, Wei Xiong, Sachiyo Obara, Hirohito Abo, Hiroko Nakatsukasa, Hiroto Kawashima.

  Lymphocyte homing to peripheral lymph nodes (PLN) is critical for immune surveillance. However, autoimmune diseases such as multiple sclerosis (MS) can occur due to excessive immune responses in the PLN. Here we show that 6-sulfo sialyl Lewis X (6-sulfo sLex) glycans on high endothelial venules that function as ligands for L-selectin on lymphocytes play a critical role in the pathogenesis of experimental autoimmune encephalomyelitis (EAE), an animal model of MS. In N-acetylglucosamine-6-O-sulfotransferase (GlcNAc6ST)-1 and GlcNAc6ST-2 double knockout mice lacking the expression of 6-sulfo sLeX glycans, the EAE symptoms and the numbers of effector Th1 and Th17 cells in the draining lymph nodes (dLN) and spinal cords (SC) were significantly reduced. To determine whether 6-sulfo sLeX could serve as a target for MS, we also examined the effects of anti-glycan monoclonal antibody (mAb) SF1 against 6-sulfo sLeX in EAE. Administration of mAb SF1 significantly reduced EAE symptoms and the numbers of antigen-specific effector T cells in the dLN and SC in association with suppression of critical genes including Il17a and Il17f that are involved in the pathogenesis of EAE. Taken together, these results suggest that 6-sulfo sLeX glycan would serve as a novel target for MS.

Keywords:  L-selectin; anti-glycan antibody; high endothelial venule; lymphocyte homing; multiple sclerosis

DOI:  https://doi.org/10.1093/intimm/dxae009