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Cocuzza C, Antoniono E, Ottone C, Cauda V, Fino D, Piumetti M. Preparation of a Mesoporous Biosensor for Human Lactate Dehydrogenase for Potential Anticancer Inhibitor Screening. ACS Biomater Sci Eng 2023; 9:6045-6057. [PMID: 37856794 PMCID: PMC10646870 DOI: 10.1021/acsbiomaterials.3c00582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 09/28/2023] [Indexed: 10/21/2023]
Abstract
Cancer is the second leading cause of death worldwide, with a dramatic impact due to the acquired resistance of cancers to used chemotherapeutic drugs and treatments. The enzyme lactate dehydrogenase (LDH-A) is responsible for cancer cell proliferation. Recently the development of selective LDH-A inhibitors as drugs for cancer treatment has been reported to be an efficient strategy aiming to decrease cancer cell proliferation and increase the sensitivity to traditional chemotherapeutics. This study aims to obtain a stable and active biocatalyst that can be utilized for such drug screening purposes. It is conceived by adopting human LDH-A enzyme (hLDH-A) and investigating different immobilization techniques on porous supports to achieve a stable and reproducible biosensor for anticancer drugs. The hLDH-A enzyme is covalently immobilized on mesoporous silica (MCM-41) functionalized with amino and aldehyde groups following two different methods. The mesoporous support is characterized by complementary techniques to evaluate the surface chemistry and the porous structure. Fluorescence microscopy analysis confirms the presence of the enzyme on the support surface. The tested immobilizations achieve yields of ≥80%, and the best retained activity of the enzyme is as high as 24.2%. The optimal pH and temperature of the best immobilized hLDH-A are pH 5 and 45 °C for the reduction of pyruvate into lactate, while those for the free enzyme are pH 8 and 45 °C. The stability test carried out at 45 °C on the immobilized enzyme shows a residual activity close to 40% for an extended time. The inhibition caused by NHI-2 is similar for free and immobilized hLDH-A, 48% and 47%, respectively. These findings are significant for those interested in immobilizing enzymes through covalent attachment on inorganic porous supports and pave the way to develop stable and active biocatalyst-based sensors for drug screenings that are useful to propose drug-based cancer treatments.
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Affiliation(s)
- Clarissa Cocuzza
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Elena Antoniono
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Carminna Ottone
- Escuela
de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Av. Brasil 2085, Valparaíso 2340000, Chile
| | - Valentina Cauda
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Debora Fino
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
| | - Marco Piumetti
- Department
of Applied Science and Technology, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
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Oluyemi WM, Samuel BB, Adewumi AT, Adekunle YA, Soliman MES, Krenn L. An Allosteric Inhibitory Potential of Triterpenes from Combretum racemosum on the Structural and Functional Dynamics of Plasmodium falciparum Lactate Dehydrogenase Binding Landscape. Chem Biodivers 2022; 19:e202100646. [PMID: 34982514 DOI: 10.1002/cbdv.202100646] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 11/29/2021] [Indexed: 12/28/2022]
Abstract
Multidrug resistance is a significant drawback in malaria treatment, and mutations in the active sites of the many critical antimalarial drug targets have remained challenging. Therefore, this has necessitated the global search for new drugs with new mechanisms of action. Plasmodium falciparum lactate dehydrogenase (pfLHD), a glycolytic enzyme, has emerged as a potential target for developing new drugs due to the parasite reliance on glycolysis for energy. Strong substrate-binding is required in pfLDH enzymatic catalysis; however, there is a lack of information on small molecules' inhibitory mechanism bound to the substrate-binding pocket. Therefore, this study investigated a potential allosteric inhibition of pfLDH by targeting the substrate-binding site. The structural and functional behaviour of madecassic acid (MA), the most promising among the six triterpenes bound to pfLDH, were unravelled using molecular dynamic simulations at 300 ns to gain insights into its mechanism of binding and inhibition and chloroquine as a standard drug. The docking studies identified that the substrate site has the preferred position for the compounds even in the absence of a co-factor. The bound ligands showed comparably higher binding affinity at the substrate site than at the co-factor site. Mechanistically, a characteristic loop implicated in the enzyme catalytic activity was identified at the substrate site. This loop accommodates key interacting residues (LYS174, MET175, LEU177 and LYS179) pivotal in the MA binding and inhibitory action. The MA-bound pfLHD average RMSD (1.60 Å) relative to chloroquine-bound pfLHD RMSD (2.00 Å) showed higher stability for the substrate pocket, explaining the higher binding affinity (-33.40 kcal/mol) observed in the energy calculations, indicating that MA exhibited profound inhibitory activity. The significant pfLDH loop conformational changes and the allostery substrate-binding landscape suggested inhibiting the enzyme function, which provides an avenue for designing antimalarial compounds in the future studies of pfLDH protein as a target.
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Affiliation(s)
- Wande M Oluyemi
- Laboratory for Natural Products and Biodiscovery Research, Pharmaceutical Chemistry Department, Faculty of Pharmacy, University of Ibadan, Nigeria
| | - Babatunde B Samuel
- Laboratory for Natural Products and Biodiscovery Research, Pharmaceutical Chemistry Department, Faculty of Pharmacy, University of Ibadan, Nigeria
| | - Adeniyi T Adewumi
- Molecular Bio-computation and Drug Design Laboratory, School of Health Sciences, University of KwaZulu-Natal, Westville Campus, Durban, 4001, South Africa
| | - Yemi A Adekunle
- Laboratory for Natural Products and Biodiscovery Research, Pharmaceutical Chemistry Department, Faculty of Pharmacy, University of Ibadan, Nigeria.,Department of Pharmaceutical Chemistry, Dora Akunyili College of Pharmacy, Igbinedion University, Okada, Benin City, Nigeria
| | - Mahmoud E S Soliman
- Molecular Bio-computation and Drug Design Laboratory, School of Health Sciences, University of KwaZulu-Natal, Westville Campus, Durban, 4001, South Africa
| | - Liselotte Krenn
- Department of Pharmacognosy, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria
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3
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Tiso T, Winter B, Wei R, Hee J, de Witt J, Wierckx N, Quicker P, Bornscheuer UT, Bardow A, Nogales J, Blank LM. The metabolic potential of plastics as biotechnological carbon sources - Review and targets for the future. Metab Eng 2021; 71:77-98. [PMID: 34952231 DOI: 10.1016/j.ymben.2021.12.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 12/15/2021] [Accepted: 12/15/2021] [Indexed: 12/19/2022]
Abstract
The plastic crisis requires drastic measures, especially for the plastics' end-of-life. Mixed plastic fractions are currently difficult to recycle, but microbial metabolism might open new pathways. With new technologies for degradation of plastics to oligo- and monomers, these carbon sources can be used in biotechnology for the upcycling of plastic waste to valuable products, such as bioplastics and biosurfactants. We briefly summarize well-known monomer degradation pathways and computed their theoretical yields for industrially interesting products. With this information in hand, we calculated replacement scenarios of existing fossil-based synthesis routes for the same products. Thereby, we highlight fossil-based products for which plastic monomers might be attractive alternative carbon sources. Notably, not the highest yield of product on substrate of the biochemical route, but rather the (in-)efficiency of the petrochemical routes (i.e., carbon, energy use) determines the potential of biochemical plastic upcycling. Our results might serve as a guide for future metabolic engineering efforts towards a sustainable plastic economy.
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Affiliation(s)
- Till Tiso
- Institute of Applied Microbiology - iAMB, Aachen Biology and Biotechnology - ABBt, RWTH Aachen University, Aachen, Germany
| | - Benedikt Winter
- Energy & Process Systems Engineering, ETH Zurich, Zurich, Switzerland; Institute of Technical Thermodynamics, RWTH Aachen University, Germany
| | - Ren Wei
- Department of Biotechnology and Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany
| | - Johann Hee
- Unit of Technology of Fuels, RWTH Aachen University, Aachen, Germany
| | - Jan de Witt
- Institute of Bio- and Geosciences IBG-1: Biotechnology, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Nick Wierckx
- Institute of Bio- and Geosciences IBG-1: Biotechnology, Forschungszentrum Jülich, 52425, Jülich, Germany
| | - Peter Quicker
- Unit of Technology of Fuels, RWTH Aachen University, Aachen, Germany
| | - Uwe T Bornscheuer
- Department of Biotechnology and Enzyme Catalysis, Institute of Biochemistry, University of Greifswald, Greifswald, Germany
| | - André Bardow
- Energy & Process Systems Engineering, ETH Zurich, Zurich, Switzerland; Institute of Technical Thermodynamics, RWTH Aachen University, Germany; Institute of Energy and Climate Research (IEK 10), Research Center Jülich GmbH, Germany
| | - Juan Nogales
- Department of Systems Biology, Centro Nacional de Biotecnología, CSIC, Madrid, Spain; Interdisciplinary Platform for Sustainable Plastics Towards a Circular Economy-Spanish National Research Council (SusPlast-CSIC), Madrid, Spain
| | - Lars M Blank
- Institute of Applied Microbiology - iAMB, Aachen Biology and Biotechnology - ABBt, RWTH Aachen University, Aachen, Germany.
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Li W, Cui X, Chen Z. Screening of lactate dehydrogenase inhibitor from bioactive compounds in natural products by electrophoretically mediated microanalysis. J Chromatogr A 2021; 1656:462554. [PMID: 34571279 DOI: 10.1016/j.chroma.2021.462554] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 12/26/2022]
Abstract
Lactate dehydrogenase (LDH) is a key enzyme in the glycolysis, which has been reported that the expression of LDH is elevated in a variety of cancer types and can promote tumor invasion and metastasis. Therefore, LDH has come to be an emerging therapeutic target for cancer. In this work, we described a new strategy for rapid screening of LDH inhibitors from natural products by integrating electrophoretically mediated microanalysis (EMMA), transverse diffusion of laminar flow profiles (TDLFP) and rapid pressure direction switching. LDH activity could be assayed by the quantification of the peak area of the produced β-Nicotinamide adenine dinucleotide hydrate (NAD+) and the inhibitory effect on LDH was reflected by the reduction of NAD+ peak area. Parameters affecting CE separation and enzymatic reaction were evaluated, including the pH of background electrolyte, incubation time, methanol percentage and enzyme concentration. The Michaelis-Menten constant (Km) determined on-line by EMMA method were 226.9 μM and 31.8 μM for substrates sodium pyruvate and NADH, respectively and the half-maximal inhibitory concentration (IC50) for the known positive inhibitor gossypol was determined to be 9.269 μM, which was comparable with the previous literature. Then the inhibitory activity of 12 bioactive compounds from natural products on LDH was investigated by employing the developed method. Three compounds including quercetin, luteolin, ursolic acid had potential inhibitory effect on LDH. Molecular docking study was implemented and well supported the experimental results. This study provides a potential tool for the preliminary screening of LDH inhibitors from bioactive compounds in natural products by capillary electrophoresis.
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Affiliation(s)
- Wen Li
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China
| | - Xinyue Cui
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China
| | - Zilin Chen
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals, and Wuhan University School of Pharmaceutical Sciences, Wuhan, 430071, China; State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Beijing 10080, China.
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5
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Saeed B, Baban R, Al-Nasiri U. Lactate dehydrogenase C4 (LDH-C4) is essential for the sperm count and motility: A case-control study. BAGHDAD JOURNAL OF BIOCHEMISTRY AND APPLIED BIOLOGICAL SCIENCES 2021. [DOI: 10.47419/bjbabs.v2i03.65] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: The lactate dehydrogenase C4 (LDH-C4) isoenzyme is an important enzyme involved in metabolic processes that are needed for spermatogenesis and sperm motility.
Objectives: This study aims to assess the activity and kinetic parameters (maximum velocity, Vmax and Michaelis constant, Km) of LDH-C4 in fertile and infertile (azoospermia and oligospermia) men in Baghdad City, Iraq.
Methods: A total of 120 participants (80 infertile and 40 healthy fertile men) were included in the current study. The patients were sub-grouped into: 40 infertile men with oligospermia, and 40 infertile men with azoospermia. The oligospermia patients were further subdivided into subgroups based on sperm count and motility. Semen samples were obtained by masturbation after 3-5 days abstain for seminal fluid analysis. The microscopic test included the assessment of the count, motility and morphology of the sperms. In addition, the coulometric assay was used for measuring the activity and kinetic parameters of LDH-C4 enzyme.
Results: The activity of LDH-C4 is significantly higher in fertile men when compared with infertile subjects (fertile: 403.13±189.90, oligospermia: 110.01±58.13, azoospermia: 39.06±28.15; p≤0.01). Statistically significant differences in LDH-C4 activity were also noted among patients with oligospermia based on sperms count and motility. Based on sperms’ count in patients with oligospermia, a significantly higher LDH-C4 activity (p≤0.01) was noted in those with higher sperm count (10-15 million/ml) when compared to others who have lesser count. Significant elevation in enzyme activity (p≤0.01) was also observed in oligospermia patients with higher percentages of motile sperms when compared with others who have fewer percentages of motile sperms. Moreover, the highest Vmax value (0.483 mmol/L.min) and the lowest Km value (0.39 mmol/L) were recorded in fertile men. While, the lowest Vmax value (0.174 mmol/L.min) and the lowest Km value (0.75 mmol/L) were detected in azoospermia patients.
Conclusions: Our results suggest that LDH-C4 is essential for the count and motility of sperm and may be considered as a therapeutic approach for infertility.
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Lalrinzuali K, Vabeiryureilai M, Jagetia GC. Sonapatha (Oroxylum indicum) mediates cytotoxicity in cultured HeLa cells by inducing apoptosis and suppressing NF-κB, COX-2, RASSF7 and NRF2. Bioorg Chem 2021; 114:105126. [PMID: 34217978 DOI: 10.1016/j.bioorg.2021.105126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 06/18/2021] [Accepted: 06/23/2021] [Indexed: 01/22/2023]
Abstract
Oroxylum indicum (Sonapatha) is traditionally used to cure several human ailments. Therefore, the cell killing effect of chloroform, ethanol, and water extracts of Sonapatha was studied in cultured HeLa cells treated with 0-100 µg/mL of these extracts/doxorubicin by MTT assay. Since ethanol extract was most cytotoxic its effect was further investigated by clonogenic, apoptosis, necrosis, and lactate dehydrogenase assays. The mechanism of cytotoxicity of Sonapatha was determined at the molecular level by estimation of caspase 8 and 3 activities and Western blot analysis of NF-κB, COX-2, Nrf2, and RASSF7 which are overexpressed in neoplastic cells. HeLa cells treated with Sonapatha extract exhibited a concentration and time-dependent rise in the cytotoxicity as indicated by the MTT assay. Ethanol extract of Sonapatha (0, 20, 40, and 80 μg/mL) reduced clonogenicity, increased DNA fragmentation, apoptotic and necrotic indices, lactate dehydrogenase release, caspase 8 and 3 activities and inhibited the overexpression of NF-κB, COX-2, Nrf2, and RASSF7 in HeLa cells concentration-dependently.
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7
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Gholizadeh N, Alipanahi Ramandi M, Motiee-Langroudi M, Jafari M, Sharouny H, Sheykhbahaei N. Serum and salivary levels of lactate dehydrogenase in oral squamous cell carcinoma, oral lichen planus and oral lichenoid reaction. BMC Oral Health 2020; 20:314. [PMID: 33167957 PMCID: PMC7653894 DOI: 10.1186/s12903-020-01306-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 10/30/2020] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Increased levels of lactate dehydrogenase (LDH) as a tumor marker have been reported in malignant and some premalignant oral lesions such as oral lichen planus (OLP) and oral lichenoid reactions (OLRs). This study aimed to assess the level of total LDH in the saliva and serum of patients with oral squamous cell carcinoma (OSCC), OLP and OLRs. METHODS In this case-control study, the participants were divided into four groups (n = 25) of healthy controls, OLP, OLRs, and OSCC. The serum and stimulated/unstimulated salivary levels of LDH were spectrophotometrically measured using standard LDH kits (Pars Azmoun). One-way ANOVA, Chi-square test, Pearson's correlation test, and receiver operating characteristic (ROC) analysis were applied to analyze the data. RESULTS The serum and salivary levels of LDH in OSCC patients were significantly higher than that the corresponding values in other groups (P = 0.0001). The serum level of LDH in OLR group was significantly higher than that in the control and OLP groups (P = 0.0001), but the difference in salivary level of LDH was not significant. The ROC analysis showed that both the serum and salivary levels of LDH had significant diagnostic ability for detection of OSCC and OLRs. Significant associations were noted between the serum and salivary levels of LDH. CONCLUSIONS Patients with OSCC and OLRs had higher serum levels of LDH than OLP and control groups. Further prospective longitudinal studies are required to assess the tissue level of LDH and monitor the transformation of OLRs because they have low rate of malignant transformation compared with other oral premalignant lesions.
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Affiliation(s)
- Narges Gholizadeh
- Department of Oral and Maxillofacial Medicine, School of Dentistry, Tehran University of Medical Science, Tehran, Iran
| | | | | | - Mehrdad Jafari
- Otorhinolaryngology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Hadi Sharouny
- Otorhinolaryngology Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nafiseh Sheykhbahaei
- Department of Oral and Maxillofacial Medicine, School of Dentistry, Tehran University of Medical Science, Tehran, Iran
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8
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Korchak S, Jagtap AP, Glöggler S. Signal-enhanced real-time magnetic resonance of enzymatic reactions at millitesla fields. Chem Sci 2020; 12:314-319. [PMID: 34163599 PMCID: PMC8178804 DOI: 10.1039/d0sc04884d] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The phenomenon of nuclear magnetic resonance (NMR) is widely applied in biomedical and biological science to study structures and dynamics of proteins and their reactions. Despite its impact, NMR is an inherently insensitive phenomenon and has driven the field to construct spectrometers with increasingly higher magnetic fields leading to more detection sensitivity. Here, we are demonstrating that enzymatic reactions can be followed in real-time at millitesla fields, three orders of magnitude lower than the field of state-of-the-art NMR spectrometers. This requires signal-enhancing samples via hyperpolarization. Within seconds, we have enhanced the signals of 2-13C-pyruvate, an important metabolite to probe cancer metabolism, in 22 mM concentrations (up to 10.1% ± 0.1% polarization) and show that such a large signal allows for the real-time detection of enzymatic conversion of pyruvate to lactate at 24 mT. This development paves the pathways for biological studies in portable and affordable NMR systems with a potential for medical diagnostics. We demonstrate that metabolism can be monitored in real-time with magnetic resonance at milli-tesla fields that are 1000 fold lower than state-of-the-art high field spectrometers.![]()
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Affiliation(s)
- Sergey Korchak
- NMR Signal Enhancement Group, Max-Planck-Insitute for Biophysical Chemistry Am Faßberg 11 37077 Göttingen Germany .,Center for Biostructural Imaging of Neurodegeneration of UMG Von-Siebold-Str. 3A 37075 Göttingen Germany
| | - Anil P Jagtap
- NMR Signal Enhancement Group, Max-Planck-Insitute for Biophysical Chemistry Am Faßberg 11 37077 Göttingen Germany .,Center for Biostructural Imaging of Neurodegeneration of UMG Von-Siebold-Str. 3A 37075 Göttingen Germany
| | - Stefan Glöggler
- NMR Signal Enhancement Group, Max-Planck-Insitute for Biophysical Chemistry Am Faßberg 11 37077 Göttingen Germany .,Center for Biostructural Imaging of Neurodegeneration of UMG Von-Siebold-Str. 3A 37075 Göttingen Germany
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9
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Madanhire T, Pereira MC, Davids H, Hosten EC, Abrahams A. Lanthanide(III) complexes with N-(2,6-dimethylphenyl)oxamate and 1,10-phenanthroline: Synthesis, characterisation and cytotoxicity against MCF-7, HEC-1A and THP-1 cell lines. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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10
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Tang P, Xu J, Louey A, Tan Z, Yongky A, Liang S, Li ZJ, Weng Y, Liu S. Kinetic modeling of Chinese hamster ovary cell culture: factors and principles. Crit Rev Biotechnol 2020; 40:265-281. [DOI: 10.1080/07388551.2019.1711015] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Peifeng Tang
- Department of Paper and Bioprocess Engineering, SUNY-ESF, Syracuse, NY, USA
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Jianlin Xu
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Alastair Louey
- Elpiscience Biopharma, Cayman Islands George Town, Grand Cayman, UK
| | - Zhijun Tan
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Andrew Yongky
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Shaoyan Liang
- Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT, USA
| | - Zheng Jian Li
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Yongyan Weng
- Department of Civil Engineering, University of Nottingham, Nottingham, UK
| | - Shijie Liu
- Department of Paper and Bioprocess Engineering, SUNY-ESF, Syracuse, NY, USA
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11
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Baicalin protects against ethanol-induced chronic gastritis in rats by inhibiting Akt/NF-κB pathway. Life Sci 2019; 239:117064. [DOI: 10.1016/j.lfs.2019.117064] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 11/07/2019] [Accepted: 11/12/2019] [Indexed: 12/11/2022]
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12
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Xu J, Tang P, Yongky A, Drew B, Borys MC, Liu S, Li ZJ. Systematic development of temperature shift strategies for Chinese hamster ovary cells based on short duration cultures and kinetic modeling. MAbs 2019; 11:191-204. [PMID: 30230966 PMCID: PMC6343780 DOI: 10.1080/19420862.2018.1525262] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 09/02/2018] [Accepted: 09/13/2018] [Indexed: 10/28/2022] Open
Abstract
Temperature shift (TS) to a hypothermic condition has been widely used during protein production processes that use Chinese hamster ovary (CHO) cells. The effect of temperature on cell growth, metabolites, protein titer and quality depends on cell line, product, and other bioreactor conditions. Due to the large numbers of experiments, which typically last 2-3 weeks each, limited systematic TS studies have been reported with multiple shift temperatures and steps at different times. Here, we systematically studied the effect of temperature on cell culture performance for the production of two monoclonal antibodies by industrial GS and DG44 CHO cell lines. Three 2-8 day short-duration methods were developed and validated for researching the effect of many different temperatures on CHO cell culture and quality attributes. We found that minor temperature differences (1-1.5 °C) affected cell culture performance. The kinetic parameters extracted from the short duration data were subsequently used to compute and predict cell culture performance in extended duration of 10-14 days with multiple TS conditions for both CHO cell lines. These short-duration culture methods with kinetic modeling tools may be used for effective TS optimization to achieve the best profiles for cell growth, metabolites, titer and quality attributes. Although only three short-duration methods were developed with two CHO cell lines, similar short-duration methods with kinetic modeling may be applied for different hosts, including both microbial and other mammalian cells.
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Affiliation(s)
- Jianlin Xu
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Peifeng Tang
- Department of Paper and Bioprocess Engineering, SUNY-ESF, Syracuse, NY, USA
| | - Andrew Yongky
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Barry Drew
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Michael C. Borys
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
| | - Shijie Liu
- Department of Paper and Bioprocess Engineering, SUNY-ESF, Syracuse, NY, USA
| | - Zheng Jian Li
- Global Product Development and Supply, Bristol-Myers Squibb Company, Devens, MA, USA
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13
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Hernández-Meza JM, Sampedro JG. Trehalose Mediated Inhibition of Lactate Dehydrogenase from Rabbit Muscle. The Application of Kramers' Theory in Enzyme Catalysis. J Phys Chem B 2018; 122:4309-4317. [PMID: 29595977 DOI: 10.1021/acs.jpcb.8b01656] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Lactate dehydrogenase (LDH) catalyzes the reduction of pyruvate to lactate by using NADH. LDH kinetics has been proposed to be dependent on the dynamics of a loop over the active site. Kramers' theory has been useful in the study of enzyme catalysis dependent on large structural dynamics. In this work, LDH kinetics was studied in the presence of trehalose and at different temperatures. In the absence of trehalose, temperature increase raised exponentially the LDH Vmax and revealed a sigmoid transition of Km toward a low-affinity state similar to protein unfolding. Notably, LDH Vmax diminished when in the presence of trehalose, while pyruvate affinity increased and the temperature-mediated binding site transition was hindered. The effect of trehalose on kcat was viscosity dependent as described by Kramers' theory since Vmax correlated inversely with the viscosity of the medium. As a result, activation energy ( Ea) for pyruvate reduction was dramatically increased by trehalose presence. This work provides experimental evidence that the dynamics of a structural component in LDH is essential for catalysis, i.e., the closing of the loop on the active site. While the trehalose mediated-increased of pyruvate affinity is proposed to be due to the compaction and/or increase of structural order at the binding site.
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Affiliation(s)
- Juan M Hernández-Meza
- Instituto de Física, Universidad Autónoma de San Luis Potosí , Manuel Nava 6, Zona Universitaria , C.P. 78290 San Luis Potosí , SLP , México
| | - José G Sampedro
- Instituto de Física, Universidad Autónoma de San Luis Potosí , Manuel Nava 6, Zona Universitaria , C.P. 78290 San Luis Potosí , SLP , México
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