1
|
Du YY, Deng HK. [A novel approach for the treatment of type 1 diabetes mellitus: transplantation of pancreatic islets derived from human chemically induced pluripotent stem cells]. Zhonghua Nei Ke Za Zhi 2023; 62:1043-1045. [PMID: 37650176 DOI: 10.3760/cma.j.cn112138-20230713-00365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Affiliation(s)
- Y Y Du
- MOE Engineering Research Center of Regenerative Medicine, School of Basic Medical Sciences, State Key Laboratory of Natural and Biomimetic Drugs, Peking University Health Science Center and the MOE Key Laboratory of Cell Proliferation and Differentiation, College of Life Sciences, PekingTsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| | - H K Deng
- MOE Engineering Research Center of Regenerative Medicine, School of Basic Medical Sciences, State Key Laboratory of Natural and Biomimetic Drugs, Peking University Health Science Center and the MOE Key Laboratory of Cell Proliferation and Differentiation, College of Life Sciences, PekingTsinghua Center for Life Sciences, Peking University, Beijing 100871, China
| |
Collapse
|
2
|
Abstract
Mevalonate, an important intermediate product of the mevalonate pathway, has a broad spectrum of applications. With the rapid growth of metabolic engineering and synthetic biology, mevalonate biosynthesis by microorganisms is feasible and holds great promise in the future. In this review, we summarize the applications of mevalonate and its derivatives and describe the biosynthesis pathways of mevalonate. The current status of mevalonate biosynthesis is also detailed with an emphasis on metabolic engineering strategies to enhance mevalonate production in typical industrial organisms, including Escherichia coli, Saccharomyces cerevisiae, and Pseudomonas putida, suggesting new insights for the efficient production of biosynthesized mevalonate.
Collapse
Affiliation(s)
- Cong-Han Wang
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Jie Hou
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Hong-Kuan Deng
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China.
| | - Li-Juan Wang
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China; College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310014, China.
| |
Collapse
|
3
|
Hou J, Deng HK, Liu ZX, Xu P, Wang LJ. Sulfur metabolism in Rhodococcus species and their application in desulfurization of fossil fuels. J Appl Microbiol 2023; 134:7074559. [PMID: 36893799 DOI: 10.1093/jambio/lxad048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 01/16/2023] [Accepted: 03/07/2023] [Indexed: 03/11/2023]
Abstract
Organosulfur compounds in fossil fuels have been a major concern in the process of achieving zero-sulfur fuel production. Biodesulfurization (BDS) is an environmentally friendly strategy for the removal of refractory organosulfur compounds from fossil fuels. Even though researchers are committed to engineering the desulfurization-specific pathway for improving BDS efficiency, the industrial application of BDS is still difficult. Recently, the sulfur metabolism of Rhodococcus has begun to attract attention due to its influences on the BDS process. In this review, we introduce the sulfur metabolism in Rhodococcus, including sulfur absorption, reduction, and assimilation; and summarize desulfurization in Rhodococcus, including the desulfurization mechanism, the regulation mechanism of the 4S pathway, and the strategies of optimizing the 4S pathway to improve BDS efficiency. In particular, the influence of sulfur metabolism on BDS efficiency is discussed. In addition, we consider the latest genetic engineering strategies in Rhodococcus. An improved understanding of the relationship between sulfur metabolism and desulfurization will enable the industrial application of BDS.
Collapse
Affiliation(s)
- Jie Hou
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo 250049, China
| | - Hong-Kuan Deng
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo 250049, China
| | - Zi-Xin Liu
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo 250049, China
| | - Ping Xu
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Li-Juan Wang
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo 250049, China
| |
Collapse
|
4
|
Wang XL, Fu BQ, Yang SJ, Wu XP, Cui GZ, Liu MF, Zhao Y, Yu YL, Liu XY, Deng HK, Chen QJ, Liu MY. Trichinella spiralis--a potential anti-tumor agent. Vet Parasitol 2008; 159:249-52. [PMID: 19041180 DOI: 10.1016/j.vetpar.2008.10.052] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Murine forestomach carcinoma (cell line MFC), ascitic hepatoma (cell line H22) and sarcoma (cell line S180) solid tumor models were used to test the anti-tumor effect of Trichinella spiralis in vivo. Mice previously infected by oral administration of 400 viable T. spiralis larvae per mouse for 7 days were grafted with various solid tumor cell lines. Other groups of tumor-bearing mice were given caudal vein injection of crude extracts of adult and newborn larvae at 17.5, 35.0 or 70.0 mg kg(-1). These treatments to inhibit tumor growth were dose-dependent (p<0.05). The anti-proliferative activity of crude T. spiralis extract was examined in vitro at 0.035, 0.070 or 0.140 mg ml(-1) using MFC, H22, S180, human chronic myeloid leukemia cell line (K562) and hepatoma cell line (H7402), tumor cell proliferation in vitro was measured by methyl thiazolium stain and was inhibited in dose-dependent manner (p<0.05). At the same doses, crude T. spiralis extracts induced apoptosis of K562 and H7402 as detected by DNA fragmentation. Cell cycle analysis indicated that crude T. spiralis extracts, at 0.140 mg ml(-1), arrested the cell cycle of K562 and H7402 in G1 or S phase. It is concluded that T. spiralis contains anti-tumor active agent.
Collapse
Affiliation(s)
- X L Wang
- Department of Pharmacology, Bethune Basic Medicine Faculty, Key Laboratory of Zoonosis, Ministry of Education, Institute of Zoonosis, Jilin University, 5333 Xian Road, Changchun, PR China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Schneider SC, Deng HK, Rottinger B, Sharma S, Stolina M, Bonpane C, Miller A, Dubinett S, Kyewski B, Sercarz E. Tolerance and determinant hierarchy. Novartis Found Symp 1998; 215:54-66; discussion 66-72. [PMID: 9760571 DOI: 10.1002/9780470515525.ch5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The overall T cell response to a multideterminant antigen consists of the sum of responses to a limited number of different determinants on the protein. Antigen-presenting cells (APCs) are crucial in delimiting the determinants on the protein to which a response will be mounted. This influence is apparent at two levels. First, the determinants that are generated and displayed by APCs in the thymus are pivotal in shaping the T cell repertoire that will be available for responding to antigen determinants in the periphery. Second, antigen processing affects the selection of determinants that become displayed by the various peripheral APC populations that are involved in inducing and promoting a T cell response. We have studied the effect of the display hierarchy on tolerance induction to individual determinants in transgenic mice expressing different serum levels of hen egg lysozyme. We have also analysed aspects of the processing machinery that contribute to shaping the hierarchy of determinant display on MHC class II molecules: proteolysis and reduction of disulfide bonds.
Collapse
Affiliation(s)
- S C Schneider
- Department of Microbiology and Molecular Genetics, UCLA, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
6
|
Scarlatti G, Tresoldi E, Björndal A, Fredriksson R, Colognesi C, Deng HK, Malnati MS, Plebani A, Siccardi AG, Littman DR, Fenyö EM, Lusso P. In vivo evolution of HIV-1 co-receptor usage and sensitivity to chemokine-mediated suppression. Nat Med 1997; 3:1259-65. [PMID: 9359702 DOI: 10.1038/nm1197-1259] [Citation(s) in RCA: 490] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Following the identification of the C-C chemokines RANTES, MIP-1alpha and MIP-1beta as major human immunodeficiency virus (HIV)-suppressive factors produced by CD8+ T cells, several chemokine receptors were found to serve as membrane co-receptors for primate immunodeficiency lentiretroviruses. The two most widely used co-receptors thus far recognized, CCR5 and CXCR4, are expressed by both activated T lymphocytes and mononuclear phagocytes. CCR5, a specific RANTES, MIP-1alpha and MIP-1 receptor, is used preferentially by non-MT2-tropic HIV-1 and HIV-2 strains and by simian immunodeficiency virus (SIV), whereas CXCR4, a receptor for the C-X-C chemokine SDF-1, is used by MT2-tropic HIV-1 and HIV-2, but not by SIV. Other receptors with a more restricted cellular distribution, such as CCR2b, CCR3 and STRL33, can also function as co-receptors for selected viral isolates. The third variable region (V3) of the gp120 envelope glycoprotein of HIV-1 has been fingered as a critical determinant of the co-receptor choice. Here, we document a consistent pattern of evolution of viral co-receptor usage and sensitivity to chemokine-mediated suppression in a longitudinal follow-up of children with progressive HIV-1 infection. Viral isolates obtained during the asymptomatic stages generally used only CCR5 as a co-receptor and were inhibited by RANTES, MIP-1alpha and MIP-1beta, but not by SDF-1. By contrast, the majority of the isolates derived after the progression of the disease were resistant to C-C chemokines, having acquired the ability to use CXCR4 and, in some cases, CCR3, while gradually losing CCR5 usage. Surprisingly, most of these isolates were also insensitive to SDF-1, even when used in combination with RANTES. An early acquisition of CXCR4 usage predicted a poor prognosis. In children who progressed to AIDS without a shift to CXCR4 usage, all the sequential isolates were CCR5-dependent but showed a reduced sensitivity to C-C chemokines. Discrete changes in the V3 domain of gp120 were associated with the loss of sensitivity to C-C chemokines and the shift in co-receptor usage. These results suggest an adaptive evolution of HIV-1 in vivo, leading to escape from the control of the antiviral C-C chemokines.
Collapse
Affiliation(s)
- G Scarlatti
- Unit of Immunobiology of HIV, DIBIT, San Raffaele Scientific Institute, Milan, Italy
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Abstract
Several members of the chemokine-receptor family serve, in conjunction with CD4, as receptors for the entry of human immunodeficiency virus type I (HIV-1) into cells. The principal receptor for entry of macrophage-tropic (M-tropic) HIV-1 strains is CCR5, whereas that for T-cell-line-tropic (T-tropic) strains is CXCR4. Unlike HIV-1, infection with either M-tropic or T-tropic strains of simian immunodeficiency virus (SIV) can be mediated by CCR5, but not CXCR4. SIV strains will also infect CD4+ cells that lack CCR5, which suggests that these strains use as yet unidentified receptors. Here we use an expression-cloning strategy to identify SIV receptors and have isolated genes encoding two members of the seven-transmembrane G-protein-coupled receptor family that are used not only by SIVs, but also by strains of HIV-2 and M-tropic HIV-1. Both receptors are closely related to the chemokine-receptor family and are expressed in lymphoid tissues. One of the receptors is also expressed in colon and may therefore be important in viral transmission. Usage of these new receptors following experimental infection of non-human primates with SIV strains may provide important insight into viral transmission and the mechanisms of SIV- and HIV-induced acquired immune-deficiency syndrome.
Collapse
MESH Headings
- 3T3 Cells
- Amino Acid Sequence
- Animals
- CD4-Positive T-Lymphocytes/virology
- Cell Line
- Chlorocebus aethiops
- Cloning, Molecular
- Gene Expression
- Gene Products, env/metabolism
- HIV-1/metabolism
- Humans
- Macaca
- Mice
- Molecular Sequence Data
- Receptors, CCR5
- Receptors, Cytokine/genetics
- Receptors, Cytokine/metabolism
- Receptors, G-Protein-Coupled
- Receptors, HIV/genetics
- Receptors, HIV/metabolism
- Receptors, Peptide/genetics
- Receptors, Peptide/metabolism
- Sequence Homology, Amino Acid
- Simian Immunodeficiency Virus/metabolism
Collapse
Affiliation(s)
- H K Deng
- Division of Molecular Pathogenesis, Skirball Institute of Biomolecular Medicine, Howard Hughes Medical Institute, New York University Medical Center, New York 10016, USA
| | | | | | | |
Collapse
|
8
|
Zhao YP, Shi BJ, Deng HK, Yu DT, Hamachi M, Hamachi T, Zhao DF, Tang SR, Tsang JC, Park MS. Epitope analysis of an HLA-B27-derived synthetic peptide: a possible approach to analyzing HLA class I antigens. Clin Exp Rheumatol 1991; 9:235-9. [PMID: 1715248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A monoclonal antibody, F3H7, was generated by immunizing mice with a synthetic peptide corresponding to residues 63-84 of the B*2705 allele of the HLA-B27 antigens. The reactive epitope and the contact residues on the peptide were localized by ELISA using a large panel of overlapping peptides as well as peptides with substituted amino acids. Residues corresponding to R75, D77 and L78 on the HLA-B27 protein appeared to be critical. The clarity of these results indicate that this is a potentially useful approach to the study of HLA class I epitopes.
Collapse
Affiliation(s)
- Y P Zhao
- Dept. of Surgery, Union Capital Hospital, Beijing, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|