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Lu SF, Lu JL. P2-441 Occupational hazards and illnesses of Filipino women workers in export processing zones. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976l.71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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2
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Lu SF, Lu JL. SP4-1 Interaction between subjective and objective occupational conditions in affecting physical health of women workers in multinational establishments. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976o.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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3
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Lu SF. Safety issues in shipyards among young labourers in the scrap metal industry. Inj Prev 2010. [DOI: 10.1136/ip.2010.029215.1022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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4
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Lu SF, Li JZ. [11 cases of hydatid disease of the common bile duct]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 18:185. [PMID: 12567707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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5
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Abstract
Reaction of [Mo3Y(mu-S)3(dtp)4(H2O)] (Y = O, S; dtp = S2P(OC2H5)2(-)) with HgI2 gave the novel compound [[Mo3S7(dtp)3]4 x I][(HgI3)3] x 4H2O (1), which contains a [[Mo3S7(dtp)3]4 x I] tetramer and (HgI3)-. Compound 1 has been characterized by IR, Raman, UV/Vis, and NMR spectroscopy and single-crystal X-ray diffraction analysis. It is shown that this formation process can be referred to as a new cluster reaction. The structure and spectroscopic data of the tetramer is also compared with that of the related discrete cluster [Mo3S7(dtp)3 x I]. Crystal data: space group F23, a = 26.786(3) A, V = 19218.7(4) A3, Z = 4, R = 0.059.
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Affiliation(s)
- J Chen
- Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou
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6
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Cheng FJ, Lu SF, Hu DX. [Advances in the expression of foreign genes in Hansenula polymorpha]. Sheng Wu Gong Cheng Xue Bao 2001; 17:246-9. [PMID: 11517593] [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] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Hansenula polymorpha is a potential host for foreign gene expression, which has been applied widely in academic studying and industry application. It has a number of advantages of expressing genes derived from eukaryotic organisms, such as mitotically stable recombinant strains, faithful processing of the produced polypeptides, and high productivity et al. Numerous foreign proteins with high commercial value have been expressed successfully in H. polymorpha, among which some have been launched on the market. In this review, the favorable characteristics of this system for foreign gene production and new advances are described.
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Affiliation(s)
- F J Cheng
- Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
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7
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Yu RM, Lu SF, Huang JQ, Huang XY, Wu QJ, Wu DX. Synthesis and characterization of three tetranuclear clusters containing a [Mo3OS3Sn]6+ cubane-like core. Inorg Chem 2000; 39:5348-53. [PMID: 11187472 DOI: 10.1021/ic990750d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Three heterometallic cubane-like clusters, [Mo3(mu 3-O)(mu 3-S)3(SnCl3)(dtp)3(py)3] (dtp = S2P(OC2H5)2-, py = C5H5N) (1), (PPN)[Mo3(mu 3-O)(mu 3-S)3(SnCl3)(dtp)3(mu-OAc)(py)] (OAc = CH3COO-, PPN = (C6H5)3PNP(C6H5)3+) (2), and (Et4N)[Mo3(mu 3-O)(mu 3-S)3(SnCl3)(dtp)2(mu-OAc)2(py)] (3) have been prepared by the reaction of [Mo3(mu 3-O)-(mu-S)3(dtp)4(H2O)] (4), [Mo3(mu 3-O)(mu-S)3(dtp)3(OAc) (py)] (5), and [Mo3(mu 3-O)(mu-S)3(dtp)2(OAc)2 (py)] (6) with SnCl2, respectively. They have been characterized by IR, UV-vis, 31P NMR, 95Mo NMR, and X-ray structure analysis. All of these heterometallic clusters have a [Mo3OS3Sn]6+ core but contain a different arrangement of peripheral ligands. As far as the neutral cluster 1 is concerned, there is no bridging OAc ligand, while only one bridging OAc ligand is observed for cluster 2 and two are for cluster 3. The Mo-Mo distances are about 0.03-0.04 A shorter than those of the starting trimolybdenum clusters. This indicates that the incorporation of SnCl3- fragment into (Mo3) clusters makes the Mo-Mo bonding enhanced. Crystal data for 1: triclinic, space group P-1, a = 10.7423(2) A, b = 14.0357(1) A, c = 16.9346(2) A, alpha = 84.054(1) degrees, beta = 87.095(1) degrees, gamma = 84.517(1) degrees, V = 2525.82(6) A3, Z = 2, R = 0.038 for 5584 reflections (I > 2.0 sigma(I)). Crystal data for 2: triclinic, space group P-1, a = 12.9529(1) A, b = 15.6324(2) A, c = 19.6355(1) A, alpha = 92.083(1) degrees, beta = 97.908(1) degrees, gamma = 110.337(1) degrees, V = 3677.41(6) A3, Z = 2, R = 0.034 for 8665 reflections (I > 2.0 sigma(I)). Crystal data for 3: monoclinic, space group P2(1)/n, a = 14.0852(5) A, b = 15.1324(5) A, c = 23.2691(7) A, beta = 97.371(1) degrees, V = 4918.7(3) A3, Z = 4, R = 0.049 for 4970 reflections (I > 2.0 sigma(I)).
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Affiliation(s)
- R M Yu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China
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8
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Lu SF, Tolstorukov II, Anamnart S, Kaneko Y, Harashima S. Cloning, sequencing, and functional analysis of H-OLE1 gene encoding delta9-fatty acid desaturase in Hansenula polymorpha. Appl Microbiol Biotechnol 2000; 54:499-509. [PMID: 11092624 DOI: 10.1007/s002530000369] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [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: 11/28/2022]
Abstract
H-OLE1, a gene encoding delta9-fatty acid desaturase (FAD) in Hansenula polymorpha strain CBS 1976, was isolated by hybridization based upon its homology with the P-OLE1 gene cloned earlier from a related species, Pichia angusta IFO 1475. The sequence of the H-OLE1 gene revealed high structural conservation with delta9-FADs from various organisms. A putative 451-amino acid polypeptide encoded by the gene, like all other delta9-FADs, contained two domains: an N-terminal catalytic domain containing three conserved histidine clusters, and a C-terminal cytochrome b5-like domain which has been suggested to be involved in electron transport in desaturation reactions. The whole H-OLE1 gene complemented a H. polymorpha fad1 mutation leading to a defect in delta9-FAD. However, the unsaturated fatty acid requirement that the Saccharomyces cerevisiae ole1 mutant displays was complemented by only the open reading frame of H-OLE1 driven by S. cerevisiae glyceroaldehyde-3-phosphate dehydrogenase promoter, but not by the intact H-OLE1, suggesting that the H. polymorpha delta9-FAD was compatible with the desaturation system of S. cerevisiae whereas the promoter of the H-OLE1 gene had no activity in heterologous cells. It was shown by Northern hybridization that transcription of the H-OLE1 gene in H. polymorpha was slightly repressed by exogenous delta9-unsaturated fatty acid. An H. polymorpha disruption mutant (deltaH-OLE1) was created by transformation of an fad1/FAD1 diploid with disrupted H-OLE1::S-LEU2 linear DNA. It was shown by genetic and molecular analyses that input DNA was integrated in several copies into the chromosomal target to replace the mutated fad1 allele. Gas chromatography analysis showed identical fatty acid compositions in cells of both fad1 and deltaHOLE1 disruption mutants.
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Affiliation(s)
- S F Lu
- Department of Biotechnology, Faculty of Engineering, Osaka University, Suita-shi, Japan
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9
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Lu SF, Herbert B, Haufe G, Laue KW, Padgett WL, Oshunleti O, Daly JW, Kirk KL. Syntheses of (R)- and (S)-2- and 6-fluoronorepinephrine and (R)- and (S)-2- and 6-fluoroepinephrine: effect of stereochemistry on fluorine-induced adrenergic selectivities. J Med Chem 2000; 43:1611-9. [PMID: 10780918 DOI: 10.1021/jm990599h] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [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: 10/17/2022]
Abstract
Several routes to the enantiomers of fluoronorepinephrines (1) and fluoroepinephrines (2) were explored. A catalytic enantioselective oxazaborolidine reduction and a chiral (salen)Ti(IV) catalyzed asymmetric synthesis of silyl cyanohydrins proved efficacious in the key stereo-defining steps of two respective routes. Binding studies of the catecholamines with alpha(1)-, alpha(2)-, beta(1)-, and beta(2)-adrenergic receptors were examined. The assays confirmed that fluorine substitution had marked effects on the affinity of (R)-norepinephrine and (R)-epinephrine for adrenergic receptors, depending on the position of substitution. Thus, a fluoro substituent at the 2-position of (R)-norepinephrine and (R)-epinephrine reduced activity at both alpha(1)- and alpha(2)-receptors and enhanced activity at beta(1)- and beta(2)-receptors, while fluorination at the 6-position reduced activity at the beta(1)- and beta(2)-receptors. The effects of fluorine substitution on the S-isomers were less predictable.
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Affiliation(s)
- S F Lu
- Laboratory of Bioorganic Chemistry, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20893, USA
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10
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Rumsey SC, Welch RW, Garraffo HM, Ge P, Lu SF, Crossman AT, Kirk KL, Levine M. Specificity of ascorbate analogs for ascorbate transport. Synthesis and detection of [(125)I]6-deoxy-6-iodo-L-ascorbic acid and characterization of its ascorbate-specific transport properties. J Biol Chem 1999; 274:23215-22. [PMID: 10438494 DOI: 10.1074/jbc.274.33.23215] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [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: 01/05/2023] Open
Abstract
Cellular ascorbic acid accumulation occurs in vitro by two distinct mechanisms: transport of ascorbate itself or transport and subsequent intracellular reduction of its oxidized product, dehydroascorbic acid. It is unclear which mechanism predominates in vivo. An easily detectable compound resembling ascorbate but not dehydroascorbic acid could be a powerful tool to distinguish the two transport activities. To identify compounds, 21 ascorbate analogs were tested for inhibition of ascorbate or dehydroascorbic acid transport in human fibroblasts. The most effective analogs, competitive inhibitors of ascorbate transport with K(i) values of 3 microM, were 6-deoxy-6-bromo-, 6-deoxy-6-chloro-, and 6-deoxy-6-iodo-L-ascorbate. No analog inhibited dehydroascorbic acid transport. Using substitution chemistry, [(125)I]6-deoxy-6-iodo-L-ascorbate (1.4 x 10(4) mCi/mmol) was synthesized. HPLC detection methods were developed for radiolabeled and nonradiolabeled compounds, and transport kinetics of both compounds were characterized. Transport was sodium-dependent, inhibited by excess ascorbate, and similar to that of ascorbate. Transport of oxidized ascorbate and oxidized 6-deoxy-6-iodo-L-ascorbate was investigated using Xenopus laevis oocytes expressing glucose transporter isoform GLUT1 or GLUT3. Oxidation of ascorbate or its analog in media increased uptake of ascorbate in oocytes by 6-13-fold compared with control but not that of 6-deoxy-6-iodo-L-ascorbate. Therefore, 6-deoxy-6-iodo-L-ascorbate, although an effective inhibitor of ascorbate transport, either in its reduced or oxidized form was not a substrate for dehydroascorbic acid transport. Thus, radiolabeled and nonradiolabeled 6-deoxy-6-iodo-L-ascorbate provide a new means for discriminating dehydroascorbic acid and ascorbate transport in ascorbate recycling.
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Affiliation(s)
- S C Rumsey
- Molecular and Clinical Nutrition Section, Digestive Diseases Branch, NIDDK, National Institutes of Health, Bethesda, Maryland 20892-1372, USA
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11
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Simon NG, Cologer-Clifford A, Lu SF, McKenna SE, Hu S. Testosterone and its metabolites modulate 5HT1A and 5HT1B agonist effects on intermale aggression. Neurosci Biobehav Rev 1999; 23:325-36. [PMID: 9884126 DOI: 10.1016/s0149-7634(98)00034-7] [Citation(s) in RCA: 72] [Impact Index Per Article: 2.9] [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: 10/18/2022]
Abstract
Our understanding of the neurochemical and neuroendocrine systems' regulating the display of offensive intermale aggression has progressed substantially over the past twenty years. Pharmacological studies have shown that serotonin, via its action at 5HT1A and/or 5HT1B receptor sites, modulates the display of intermale aggressive behavior and that its effects serve to decrease behavioral expression. Neuroendocrine investigations, in turn, have demonstrated that male-typical aggression is testosterone-dependent and studies of genetic effects, metabolic function and steroid receptor binding have shown that facilitation of behavioral displays can occur via independent androgen-sensitive or estrogen-sensitive pathways. Remarkably, there have been virtually no studies that examined the interrelationship between these facilitative and inhibitory systems. As an initial step toward characterizing the interaction between the systems, studies were conducted that assessed hormonal modulation of serotonin function at 5HT1A and 5HT1B receptor sites. They demonstrated: (1) that the androgenic and estrogenic metabolites of testosterone differentially modulate the ability of systemically administered 8-OH-DPAT (a 5HT1A agonist) and CGS12066B (a 5HT1B agonist) to decrease offensive aggression; and (2) when microinjected into the lateral septum (LS) or medial preoptic area (MPO), the aggression-attenuating effects of 1A and 1B agonists differ regionally and vary with the steroidal milieu. In general, the results suggest that estrogens establish a restrictive environment for attenuation of T-dependent aggression by 8-OH-DPAT and CGS 12066B, while androgens either do not inhibit, or perhaps even facilitate, the ability of 5HT1A and 5HT1B agonists to reduce aggression. Potential mechanisms involved in the production of these steroidal effects are discussed and emerging issues that may impact on efforts to develop an integrative neurobiological model of offensive, intermale aggression are considered.
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Affiliation(s)
- N G Simon
- Department of Biological Sciences, Lehigh University, Bethlehem, PA 18015, USA
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12
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Abstract
The androgen receptor (AR) is generally considered an autoregulated protein. However, studies in brain have produced mixed results regarding sex differences, which should be present given the higher endogenous levels of androgens in males, and the effects of gonadectomy, which presumably should lead to a loss of AR. Resolving these issues is a necessary step in developing a model of AR regulation in the central nervous system and, more broadly, in determining how regulation of this receptor may mediate neural target tissue responsiveness to androgen. To further investigate these issues, the distribution, density, and regulation of neural AR were compared among male and female mice that were intact, gonadectomized, or gonadectomized and given testosterone propionate (TP) through immunocytochemical and Western blot analyses. Four brain areas that have been linked to the regulation of male-typical behavior were evaluated: bed nucleus of the stria terminalis, posterior aspect, medial preoptic area, and dorsal and ventral aspects of the lateral septum. In the immunocytochemical study, integrated particle density, which reflects the average intensity of AR staining, was assessed among the six groups 24 h after surgery using PG-21, a peptide-based AR antiserum. Major findings included regional differences in the intensity of immunostaining; a robust sexual dimorphism in each region, with males exhibiting more intense staining than females; a loss of AR in both sexes after gonadectomy, with more dramatic changes evident in males; and significant up-regulation of AR in response to TP that was equivalent in both sexes. The Western blot analyses of AR in limbic system extracts prepared from the six groups showed a pattern of differences that mirrored the immunocytochemical results, indicating that PG-21 recognized both liganded and unliganded AR. In addition, a dose-response study, in which gonadectomized males and females were administered from 25-1000 microg TP, demonstrated a significant linear trend in up-regulation of AR in both males and females, with no sexual dimorphism in the response to hormone treatment. These results demonstrate that the regulation of AR in both male and female neural tissue is comparable and that the critical determinant of AR expression is the presence or absence of androgen.
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Affiliation(s)
- S F Lu
- Department of Biological Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA
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13
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Liu TT, Hsiao KJ, Lu SF, Wu SJ, Wu KF, Chiang SH, Liu XQ, Chen RG, Yu WM. Mutation analysis of the 6-pyruvoyl-tetrahydropterin synthase gene in Chinese hyperphenylalaninemia caused by tetrahydrobiopterin synthesis deficiency. Hum Mutat 1998; 11:76-83. [PMID: 9450907 DOI: 10.1002/(sici)1098-1004(1998)11:1<76::aid-humu12>3.0.co;2-w] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [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
Hyperphenylalaninemia (HPA) may be caused by deficiency of phenylalanine hydroxylase or tetrahydrobiopterin (BH4), the essential cofactor for the aromatic amino acid hydroxylases. 6-Pyruvoyl-tetrahydropterin synthase (PTPS) deficiency is a major cause of BH4 deficient HPA. In this study, seven single base mutations at nucleotides 73 (C>G), 155 (A>G), 166 (G>A), 209 (T>A), 259 (C>T), 286 (G>A), and 317 (C>T) on PTPS cDNA were detected in Chinese PTPS-deficient HPA by polymerase chain reaction and solid phase DNA sequencing. These nucleotide alterations result in R25G, N52S, V56M, V70D, P87S, D96N, and T106M amino acid substitutions, respectively. The R25G, V56M, V70D, and T106M were novel mutations found in PTPS gene. By analysis of 38 PTPS mutant alleles from 19 unrelated Chinese PTPS-deficient HPA families, the allele frequency of these mutations in Chinese PTPS-deficient HPA were determined to be approximately 5.3% (R25G), 34.2% (N52S), 7.9% (V56M), 2.6% (V70D), 36.8% (P87S), 7.9% (D96N), and 2.6% (T106M), respectively. Two common mutations, N52S and P87S, were found to account for 71% of the Chinese PTPS mutant alleles. The N52S mutation accounts for 48% of the southern Chinese PTPS mutation, but only one (9%) of the northern Chinese PTPS mutant allele was found to be N52S, which suggested that the N52S mutation might be southern Chinese. Clinically, the V56M mutation was found to associate with the mild form of PTPS deficiency. However, the R25G, N52S, P87S, and D96N were found mainly in the patients with severe clinical symptom. Using polymerase chain reaction-based mutation analysis, a fetus at risk of PTPS deficiency was diagnosed prenatally to be a carrier of N52S mutation.
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Affiliation(s)
- T T Liu
- Institute of Biochemistry, National Yang-Ming University, Taipei, Taiwan
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14
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Abstract
Testosterone (T) and its androgenic and estrogenic metabolites modulate the ability of serotonin (5-HT)1A and 5-HT1B agonists to inhibit intermale aggressive behavior. This study tested whether the lateral septum (LS) and medial preoptic area (MPO), which are part of the neuroanatomical substrate for aggression and contain androgen, estrogen, 5-HT1A and 5-HT1B receptors, represent sites where these modulatory effects occur. Gonadectomized CF-1 male mice were given silastic implants containing diethylstilbestrol (DES, a synthetic estrogen) or dihydrotestosterone (DHT, a nonaromatizable androgen) and implanted bilaterally with guide cannula directed at the LS or MPO. They were microinjected with either CGS12066B, a 5-HT1B agonist (400 microM LS, 200 microM MPO); 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT), a 5-HT1A agonist (10 microM LS, 5 microM MPO); or combined CGS + 8-OH-DPAT treatment and tested for aggression 15 min later. When microinjections were given in the LS, androgen-treated males exhibited significantly reduced attack behavior in response to CGS or to CGS + 8-OH-D PAT. The attack behavior of DES-treated males was not reduced by any of the treatments. In contrast, all agonist treatments decreased aggression when injected into the MPO in both hormone conditions. The findings demonstrate regional variation in the ability of androgens and estrogens to modulate 5-HT1A- and 5-HT1B-agonist mediated reductions in aggression.
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Affiliation(s)
- A Cologer-Clifford
- Department of Biological Sciences, Lehigh University, Bethlehem, PA 18015, USA
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15
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Ge P, Tang SH, Ji W, Shi S, Hou HW, Long DL, Xin XQ, Lu SF, Wu QJ. Alteration of Nonlinear Refraction by Mixing Clusters [WOS3Cu3I(py)5] and [MoOS3Cu3I(py)5]. J Phys Chem B 1997. [DOI: 10.1021/jp961837c] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | - S. Shi
- SS-ALL Technologies, Singapore 079903, Republic of Singapore
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Abstract
There are multiple pathways involved in the regulation of male typical aggression by T, and the functional pathway is determined by genotype. Target-tissue sensitivity to the aggression-promoting properties of T and its estrogenic and androgenic metabolites is determined by a complex sequence of events in which steroid receptors play a critical role. To date, it appears that the relative density of AR may be an important factor in the biobehavioral effects of androgens. Regarding sensitivity to estrogens, characterization of ER-NM interactions, and understanding of the contribution of the two activating functions within ER, appears to be necessary to comprehensively describe the cellular basis for responsiveness to the aggression-promoting effect of this T metabolite. In broader terms, these observations indicate that understanding the relationship between T and the expression of aggression in humans will require models that incorporate cellular aspects of steroid hormone action, including metabolism, receptor function, and gene regulation.
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Affiliation(s)
- N G Simon
- Department of Biological Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA
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17
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Lu SF, Pan FM, Chiou SH. Sequence analysis of four acidic beta-crystallin subunits of amphibian lenses: phylogenetic comparison between beta- and gamma-crystallins. Biochem Biophys Res Commun 1996; 221:219-28. [PMID: 8619837 DOI: 10.1006/bbrc.1996.0577] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [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: 01/31/2023]
Abstract
beta-Crystallins composed of the most heterogeneous group of subunit chains among the three major crystallin families of vertebrates, i.e. alpha-, beta- and gamma-crystallins, are less well understood at the structural and functional levels than the other two. They comprise a multigene family with at least three basic (betaB1-3) and four acidic (betaA1-4) subunit polypeptides. In order to facilitate the determination of the primary sequences of all these ubiquitous crystallin subunits present in all vertebrate species, cDNA mixture was synthesized from the poly(A)+ mRNA isolated from bullfrog eye lenses. We report here a protocol of Rapid Amplification of cDNA Ends (RACE) was used to amplify cDNAs encoding beta-crystallin acidic subunit polypeptides by polymerase chain reaction (PCR). Four complete full-length reading frames with two each of 597 and 648 base pairs, which cover four deduced protein sequences of 198 (betaA1-1 and betaA1-2) and 215 (betaA3-1 and betaA3-2) amino acids including the universal initiating methionine, were revealed by nucleotide sequencing. They show about 96-98% sequence similarity among themselves and 76-80%, 80-83% to the homologous betaA1/A3 crystallins of bovine and human species respectively, revealing the close structural relationship among acidic subunits of all beta-crystallins even from remotely related species. In this study a phylogenetic comparison based on amino-acid sequences of various betaA1/A3 crystallins plus the major basic beta-crystallin (betaBp) and gamma-crystallin from different vertebrate species is made using a combination of distance matrix and approximate parsimony methods, which correctly groups these betaA crystallin chains together as one family distinct from basic beta-crystallins and gamma-crystallin and further corroborates the supposition that beta- and gamma-crystallins form a superfamily with a common ancestry.
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Affiliation(s)
- S F Lu
- Laboratory of Crystallin Research, Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan
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18
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Lu SF, Pan FM, Chiou SH. Characterization of gamma-crystallin from the eye lens of bullfrog: complexity of gamma-crystallin multigene family as revealed by sequence comparison among different amphibian species. J Protein Chem 1996; 15:103-13. [PMID: 8838595 DOI: 10.1007/bf01886816] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
gamma-Crystallin is the major and most abundant lens protein present in the eye lens of lower vertebrates such as amphibian and piscine species. To facilitate structural characterization of gamma-crystallins isolated from the lens of the bullfrog (Rana catesbeiana), a cDNA mixture was synthesized from the poly(A)+mRNA isolated from fresh eye lenses. cDNA encoding gamma-crystallin was then amplified using polymerase chain reaction (PCR) based on two primers designed according to the relatively conserved N- and C-terminal sequences of known gamma-crystallins from teleostean fishes. PCR-amplified product corresponding to gamma-crystallin isoforms was obtained, which was then subcloned in pUC18 vector and transformed into Escherichia coli strain JM109. Plasmids containing amplified gamma-crystallin cDNAs were purified and prepared for nucleotide sequencing by the dideoxynucleotide chain-termination method. Sequencing several clones containing DNA inserts of about 0.54 kb revealed the presence of two isoforms with an open reading frame of 534 base pairs, covering two gamma-crystallins each with a deduced protein sequence of 177 amino acids including the translation-initiating methionine. These gamma-crystallins of pI 6.364 and 6.366 contain a low-methionine content of 2.81%, in contrast to 11-16% obtained for those gamma-crystallins with high-methionine content from most teleostean lenses. Pairwise sequence comparison of bullfrog gamma-crystallins with those published sequences of gamma-crystallins from carp, shark, Xenopus and another Rana frog, bovine, and human lenses indicates that there is only 46-63% sequence similarity among these species, revealing that amphibians possess a very complex and heterogeneous group of gamma-crystallins even from closely related species of Rana frogs. The sequence analysis and comparison of various isoforms of the frog gamma-crystallin family provide a firm basis for identifying these lens proteins as members of a multigene family more complex than that reported for mammalian gamma-crystallins.
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Affiliation(s)
- S F Lu
- Laboratory of Crystallin Research, National Taiwan University, Taipei
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Pan FM, Chang WC, Lu SF, Hsu AL, Chiou SH. Sequence analysis of one major basic beta-crystallin (beta Bp) of amphibian lenses: evolutionary comparison and phylogenetic relatedness between beta- and gamma-crystallins. Biochem Biophys Res Commun 1995; 217:940-9. [PMID: 8554619 DOI: 10.1006/bbrc.1995.2861] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 01/31/2023]
Abstract
beta Bp-Crystallin, a major basic beta-crystallin of vertebrate eye lens, is developmentally regulated during the process of amphibian metamorphosis. In order to facilitate the determination of the primary sequence of this ubiquitous crystallin present in all vertebrate species, cDNA mixture was synthesized from the poly(A)+ mRNA isolated from bullfrog eye lenses. A protocol of Rapid Amplification of cDNA Ends (RACE) was used to amplify cDNAs encoding beta Bp-crystallin by polymerase chain reaction (PCR). PCR-amplified product corresponding to beta Bp-crystallin was then ligated into pGEM-T vector and then transformed into E. coli strain JM109. One complete full-length reading frame of 615 base pairs, which covers a deduced protein sequence of 205 amino acids, including the universal initiating methionine, was revealed by automatic nucleotide sequencing with a fluorescence-based dideoxynucleotide chain-termination method. It shows 83, 74, 78 and 80 percent sequence similarity to the homologous beta 2 crystallins of chicken, rat, bovine, and human species, respectively, revealing the close structural relationship among beta Bp-crystallins even from remotely related species. In this study phylogenetic trees based on nucleotide and protein sequences of various beta- and gamma-crystallins from different vertebrate classes are constructed using a combination of distance matrix and approximate parsimony methods, which corroborate the previous supposition that beta- and gamma-crystallins form a superfamily with a common ancestry.
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Affiliation(s)
- F M Pan
- Laboratory of Crystallin Research, National Taiwan University, Republic of China
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Lu SF, Pan FM, Chiou SH. Sequence analysis of frog alpha B-crystallin cDNA: sequence homology and evolutionary comparison of alpha A, alpha B and heat shock proteins. Biochem Biophys Res Commun 1995; 216:881-91. [PMID: 7488208 DOI: 10.1006/bbrc.1995.2704] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [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: 01/25/2023]
Abstract
alpha-Crystallin is a major lens protein present in the lenses of all vertebrate species. Recent studies have revealed that bovine alpha-crystallins possess genuine chaperone activity similar to small heat-shock proteins. In order to facilitate the determination of the primary sequence of amphibian alpha B-crystallin, cDNA encoding alpha B subunit chain was amplified using a new "Rapid Amplification of cDNA Ends" (RACE) protocol of Polymerase Chain Reaction (PCR). PCR-amplified product corresponding to alpha B subunit was then subcloned into pUC18 vector and transformed into E. coli strain JM109. Plasmids purified from the positive clones were prepared for nucleotide sequencing by the automatic fluorescence-based dideoxynucleotide chain-termination method. Sequencing more than five clones containing DNA inserts coding for alpha B-crystallin subunit constructed only one complete full-length reading frame of 522 base pairs similar to that of alpha A subunit, covering a deduced protein sequence of 173 amino acids including the universal translation-initiating methionine. The frog alpha B crystallin shows 69, 66 and 56% whereas alpha A crystallin shows 83, 81 and 69% sequence similarity to the homologous chains of bovine, chicken and dogfish, respectively, revealing a more divergent structural relationship among these alpha B subunits as compared to alpha A subunits. Structural analysis and comparison of alpha A- and alpha B-crystallin subunits from eye lenses of different classes of vertebrates also shed some light on the evolutionary relatedness between alpha B/alpha A crystallins and the small heat-shock proteins.
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Affiliation(s)
- S F Lu
- Laboratory of Crystallin Research, National Taiwan University, Taipei
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Lu SF, Pan FM, Chiou SH. Sequence analysis of frog rho-crystallin by cDNA cloning and sequencing: a member of the aldo-keto reductase family. Biochem Biophys Res Commun 1995; 214:1079-88. [PMID: 7575513 DOI: 10.1006/bbrc.1995.2396] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 01/26/2023]
Abstract
rho-Crystallin is a major enzyme crystallin present in the lenses of amphibian species with a blocked amino terminus. In order to facilitate the determination of the primary sequence of this taxon-specific crystallin, cDNA mixture was synthesized from the poly(A)+mRNA of bullfrog eye lenses. cDNAs encoding rho-crystallin were then amplified by polymerase chain reaction (PCR) using a new protocol of Rapid Amplification of cDNA Ends (RACE). PCR-amplified product corresponding to rho-crystallin was obtained, which was then subcloned into pUC18 vector and then transformed into E. coli strain JM109. Plasmids purified from the positive clones were prepared for nucleotide sequencing by the automatic fluorescence-based dideoxynucleotide chain-termination method. Sequencing more than 15 clones containing DNA inserts coding for rho-crystallin constructed only one unique and complete full-length reading frame of 975 base pairs covering a deduced protein sequence of 324 amino acids including the universal initiating methionine. It shows 96, 59, 46 and 37 percent sequence similarity to another rho-crystallin from European common frog, bovine prostaglandin-F synthase, human aldose reductase and human aldehyde reductase, respectively, revealing the close relationship between rho-crystallins from related amphibian species and its possible evolutionary relatedness with various aldo-keto reductases. In this study a phylogenetic tree for rho-crystallin and related enzymes is constructed based on multiple-sequence alignment program using a combination of distance matrix and approximate parsimony methods. We have thus established the remote phylogenetic relationship between rho-crystallin and some aldehyde/aldose reductases, which may provide a possible link for the recruitment of this crystallin from detoxification-related enzymes and its physiological role in maintaining a transparent and clear lens.
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Affiliation(s)
- S F Lu
- Laboratory of Crystallin Research, National Taiwan University, Taipei
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Chiou SH, Yu CW, Lin CW, Pan FM, Lu SF, Lee HJ, Chang GG. Octopus S-crystallins with endogenous glutathione S-transferase (GST) activity: sequence comparison and evolutionary relationships with authentic GST enzymes. Biochem J 1995; 309 ( Pt 3):793-800. [PMID: 7639695 PMCID: PMC1135702 DOI: 10.1042/bj3090793] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [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: 01/26/2023]
Abstract
S-Crystallin is a major protein present in the lenses of cephalopods (octopus and squid). To facilitate the cloning of this crystallin gene, cDNA was constructed from the poly(A)+ mRNA of octopus lenses, and amplified by PCR for nucleotide sequencing. Sequencing of 10 of 15 positive clones coding for this crystallin revealed three distinct S-crystallin isoforms with 61-64% identity in nucleotide sequences and 42-58% similarity in amino acid sequences when compared with homologous crystallins in squid lenses. These charge-isomeric crystallins also show between 26 and 33% amino acid sequence identity to four major classes of glutathione S-transferase (GST), a major detoxification enzyme present in most mammalian tissues. For further analysis, expression of one of the S-crystallin cDNAs was carried out in the bacterial expression system pQE-30, and the S-crystallin protein produced in Escherichia coli was purified to homogeneity to determine the enzymic properties. We found that the expressed octopus S-crystallin possessed much lower GST activity than the authentic GSTs from other tissues. Sequence comparison and construction of phylogenetic trees for S-crystallins from squid and octopus lenses and various classes of GSTs revealed that S-crystallins represent a multigene family which is structurally related to Alpha-class GSTs and probably derived from the ancestral GST by gene duplication and subsequent multiple mutational substitutions.
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Affiliation(s)
- S H Chiou
- Laboratory of Crystallin Research, National Taiwan University, Taipei
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Lu SF, Pan FM, Chiou SH. Sequence analysis of frog alpha-crystallin cDNA and its deduced primary structure: comparison of alpha A subunit chains among different vertebrate species. Biochem Biophys Res Commun 1995; 210:974-81. [PMID: 7763271 DOI: 10.1006/bbrc.1995.1752] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 01/27/2023]
Abstract
alpha-Crystallin which is present in the lenses of all vertebrate species is a major lens protein with blocked amino terminus. To facilitate the cloning and sequence determination of amphibian alpha-crystallin, total cDNA mixture was constructed from the poly(A)+mRNA of eye lenses from the bullfrog. cDNAs encoding alpha A and alpha B chains of alpha-crystallin were then amplified by polymerase chain reaction (PCR) using primers based on the N- and C-terminal amino-acid sequences of conserved mammalian alpha-crystallin subunit chains. PCR-amplified product corresponding to alpha A crystallin subunit was obtained, which was then subcloned into pUC18 vector and then transformed into E. coli strain JM109. Plasmids purified from the positive clones were prepared for nucleotide sequencing by dideoxynucleotide chain-termination method. Sequencing several clones containing DNA inserts coding for alpha A-crystallin constructed a complete full-length reading frame of 522 base pairs covering a deduced protein sequence of 173 amino acids including the universal translation-initiating methionine. The frog alpha A shows 95, 82 and 81% sequence identity to alpha A crystallin chains of another species of Rana frog, bovine and human, respectively, revealing the close relationship among alpha A crystallins from remotely related species. The present report on the determination of primary structure for frog alpha A-crystalline chain through cDNA cloning and sequencing has provided the missing N-terminal segment of alpha A sequence reported for another amphibian species and would represent the first complete frog alpha A-crystallin sequence solved by PCR technique.
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Affiliation(s)
- S F Lu
- Laboratory of Crystallin Research, National Taiwan University, Taipei
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Abstract
Both sham-operated rats and rats with lesions of the nigrostriatal dopamine (DA) pathway were subjected to increasing or decreasing carotid sinus pressure (respectively produced by phenylephrine injection or bilateral carotid occlusion) and their striatal DA release and baroreflex responses were compared. In sham-operated rats, phenylephrine produced both increased striatal DA release and decreased heart rate, while bilateral carotid occlusion produced the opposite effects. Both the striatal DA release and baroreflex responses produced by phenylephrine or carotid occlusion were attenuated by lesions of the nigrostriatal DA pathway induced by intramedial forebrain bundle injection of 6-hydroxydopamine. The data indicate that the nigrostriatal DA pathway mediates baroreflex sensitivity in rats.
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Affiliation(s)
- S F Lu
- Department of Industrial Safety and Health, Chia-Nan Junior College of Pharmacy, Tainan, Taiwan, Republic of China
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Abstract
The family of biotin enzymes, which are involved in carboxylation, transcarboxylation, and decarboxylation reactions in cells, is essential and conserved for bacteria. The prosthetic group biotin is stably linked to the biotinyl-polypeptide by an amide bond. Since avidin interacts with biotin in an irreversible manner, the patterns of biotinyl-polypeptides for bacterial cells could be revealed by probing them with an avidin-enzyme complex in Western blots of total cellular proteins. In this way, the family of commonly existing gene products of bacteria could be monitored and compared without the use of specific DNA probes, oligonucleotide primers, or antibodies. In this study, this approach was tested and it was found that different species of bacteria showed different patterns of biotinyl-polypeptides. Our results indicate that patterns of biotinyl-polypeptides can be a promising analytical target for bacterial identification.
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Affiliation(s)
- L C Au
- Department of Medical Research, Veterans General Hospital-Taipei, Taiwan, Republic of China
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Ramamurthy S, Walzak TL, Lu SF, Lipson TC, McIntyre NS. Study of tinplate structure using imaging secondary ion spectrometry. SURF INTERFACE ANAL 1991. [DOI: 10.1002/sia.740171203] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kyle DJ, Martin JA, Burch RM, Carter JP, Lu SF, Meeker S, Prosser JC, Sullivan JP, Togo J, Noronha-Blob L. Probing the bradykinin receptor: mapping the geometric topography using ethers of hydroxyproline in novel peptides. J Med Chem 1991; 34:2649-53. [PMID: 1652027 DOI: 10.1021/jm00112a047] [Citation(s) in RCA: 61] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- D J Kyle
- Nova Pharmaceutical Corporation, Baltimore, Maryland 21224
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Lu SF, Huang MD, Huang JQ, Huang ZX, Huang JL. Structure of tris(diethyldithiophosphato-S,S')-μ-(diethylthiophosphate-O,S)-(oxazole)-μ3-sulfido-tri-μ2-sulfido-cyclo-trimolybdenum(3 Mo–Mo). Acta Crystallogr C 1990. [DOI: 10.1107/s0108270190001299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Shi LJ, Ni ZM, Lu SF, Wang G, Qi HL, Su QX. Enrichment of the spindle fiber attachments from mouse liver cell nuclei. Sci China B 1989; 32:816-21. [PMID: 2818818] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Spindle fiber attachments (SFAs) were enriched in a fraction of nuclei isolated from mouse livers. The enrichment method combines sonication, treatment with 2 mol/L NaCl and high speed centrifugation. SFA was enriched 27-fold on the average (n = 4) when measured by radioimmunoassay. The basic method offers opportunities for further increases of yield and for the enrichment of SFA of other vertebrates.
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Affiliation(s)
- L J Shi
- Shanghai Institute of Cell Biology, Academia Sinica
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Huang JL, Huang JQ, Lu SF, Zhang HH, Wu DM, Lin YH, Zhang XM, Lu JX. Crystal and molecular structure of some cubane-like tetranuclear molybdenum clusters. Acta Crystallogr A 1987. [DOI: 10.1107/s0108767387080322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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32
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Yang ZB, Han Y, Zhu AP, Lin MZ, Chen LX, Lu SF, Lu XH. [Studies on the BMI model percutaneous intra-aortic-balloon]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1986; 8:132-8. [PMID: 2944643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Lu SF, Yu JL, Li YT. [Mechanism of anisodamine in the treatment of aplastic anemia]. Zhonghua Nei Ke Za Zhi 1986; 25:10-2, 62. [PMID: 3015509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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34
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Lu SF, Chen XW, Lin TB. [Diagnosis and treatment of Waldenstrom's macroglobulinemia: 4 case reports]. Zhonghua Nei Ke Za Zhi 1985; 24:358-9, 382-3. [PMID: 3926417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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35
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Gu ZF, Wu XD, Li YJ, Zhang PZ, Guo XM, Lu SF. [Application of trichosanthin in 179 difficult cases of artificial abortion]. Shengzhi Yu Biyun 1985; 5:10-4. [PMID: 12267328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
This article introduces the application of compound crystal trichosanthin to 179 difficult cases of artificial abortion including cases with extreme anteversion and anteflexion of uterus with a fine and long cervix, cases with uterine deformations, cases within 1 year after cesarotomy, and cases of recently induced abortion. Past experiences have indicated that there have been considerable difficulties in inducing abortion in such cases as the above, and that accidents have been liable to occur. The authors have recently employed compound crystal trichosanthin, composed of crystal trichosanthin, testosterone propionate and reserpine, and succeeded in bringing about drug expansion of uterus and abortion, and safe abortion at that. The success roles were as follows: 97.96% for the group with extreme anteversion and anteflexion of uterus with a fine and long cervix, 100% for the one with uterine deformations, 95.08% for the one with past cesarotomy and 96.72% for the one with recently induced abortion.
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Li L, Lu SF, Jiang XH. Clinical analysis of 80 cases of post-traumatic chronic subdural hematoma. Acta Acad Med Wuhan 1984; 4:252-6. [PMID: 6527849 DOI: 10.1007/bf02857175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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37
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Li YM, Lu SF, Li XT. Cataract incidence in mice surviving lethal irradiation and bone marrow transplantation. Chin Med J (Engl) 1983; 96:619-24. [PMID: 6416762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
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38
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Lu SF. [The relationship between aplastic anemia and immunity]. Zhonghua Yi Xue Za Zhi 1982; 62:564-8. [PMID: 6816451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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39
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Lu SF. [Clinical analysis of 24 cases of autoimmune hemolytic anemia (author's transl)]. Zhonghua Nei Ke Za Zhi 1981; 20:286-9. [PMID: 7307755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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