76
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Alexander V, Lazarus H, McGovern H. Controlled substances registration for nonlicensed physicians. HOSPITALS 1978; 52:165-6, 168, 170. [PMID: 689606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Changes in drug laws and the addition of many formerly uncontrolled drugs to the controlled substances list has caused some concern about the registration of nonlicensed physicians. The question is, how does the recent medical school graduate obtain authorization to use the controlled substances he may need in the course of his postgraduate training at the hospital? The University of Alabama Hospitals, Birmingham, have answered the question with an effective system for hospital registration of nonlicensed physicians.
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77
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Schwaber J, Lazarus H, Rosen FS. Bone marrow-derived lymphoid cell lines from patients with agammaglobulinemia. J Clin Invest 1978; 62:302-10. [PMID: 209061 PMCID: PMC371767 DOI: 10.1172/jci109130] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
In vitro infection with Epstein-Barr virus of bone marrow-derived (B) lymphocytes from blood of patients with X-linked or common varied agammaglobulinemia resulted in the establishment of long-term B-lymphoid cell lines (LCL). LCL were established only with B lymphocytes from patients whose B cells failed to respond to in vitro mitogenic stimulation. In contrast, lymphocytes from patients without small B lymphocytes or with B cells that synthesized but failed to secrete Ig failed uniformly to establish LCL. Analysis of the "nonsecretory" B lymphocytes demonstrated the presence of receptors for C3b and C3d as well as surface Ig, but absence of detectable receptors for Epstein-Barr virus. All of the six cell lines that were established formed rosettes with EAC3 but not with sheep erythrocytes. Four of the six LCL were principally surface IgD bearing and did not synthesize detectable Ig for secretion. Two of the cell lines were indistinguishable from cell lines from normal individuals: they had surface IgG, A, M, and D and synthesized and secreted Ig.
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78
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Orkin SH, Alter BP, Altay C, Mahoney MJ, Lazarus H, Hobbins JC, Nathan DG. Application of endonuclease mapping to the analysis and prenatal diagnosis of thalassemias caused by globin-gene deletion. N Engl J Med 1978; 299:166-72. [PMID: 661890 DOI: 10.1056/nejm197807272990403] [Citation(s) in RCA: 169] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We applied a recently developed and more direct technic to diagnose thalassemia syndromes associated with deletion of particular globin structural genes and to assess a fetus at risk for one of those conditions, deltabeta-thalassemia. The method allows assessment of the globin genes present in total cellular DNA and is applicable to amniotic-fluid cell DNA. Cellular DNA fragments produced by cleavage using two specific restriction endonucleases are separated on the basis of size by agarose-gel electrophoresis, and the distribution of specific sequences among the DNA fragments determined by molecular hybridization. We observed the total deletion of alpha-globin genes in homozygous alpha-thalassemia (hydrops fetalis with hemoglobin Bart's) and the deletion of particular beta and beta-like sequences in cases homozygous for hereditary persistence of fetal hemoglobin and deltabeta-thalassemia. Analysis of amniotic-fluid cell DNA from a fetus at risk for deltabeta-thalassemia demonstrated the feasibility of these improved methods for antenatal diagnosis. The molecular studies confirmed the diagnosis predicted by analysis of fetal blood and established at birth.
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79
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80
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Schwaber J, Lazarus H, Rosen FS. Restricted classes of immunoglobulin produced by a lymphoid cell line from a patient with agammaglobulinemia. Proc Natl Acad Sci U S A 1978; 75:2421-3. [PMID: 209464 PMCID: PMC392565 DOI: 10.1073/pnas.75.5.2421] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Restricted expression of immunoglobulin by a long-term B lymphoid cell line derived from a patient with X-linked agammaglobulinemia is reproted. The patient had peripheral blood B lymphocytes with surface IgD and IgM. Culture of the B cells in vitro with mitogens did not stimulate immunoglobulin secretion, although pokeweed mitogen stimulation resulted in the development of cytoplasmic IgD and IgM. The lymphoid cell line established from these B lymphocytes primarily bore surface IgD, with a small population of cells also bearing surface IgM. These cells also had cytoplasmic immunoglobulin, primarily IgD. The cell line did not have a cytoplasmic pool of immunoglobulin for export and did not secrete immunoglobulin. This B lymphoid cell line is an in vitro analogue of the arrest in differentiation of the patient's B lymphocytes. The IgD-bearing phenotype may represent a normal transitional stage in the differentiation of B lymphocytes.
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81
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Lazarus H, Barell EF, Krishan A, Livingston DM, Harris K, Schlossman SF, Chess L. Characterization of a unique cell line (LAZ 221) from human acute lymphocytic ("null" cell) leukemia. Cancer Res 1978; 38:1362-7. [PMID: 205365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A unique human cell line designated LAZ 221 has been established from the peripheral blood of a patient with acute lymphocytic leukemia of the "null" cell type. The cell line does not possess the Epstein-Barr virus nuclear antigen and has a karyotype of 45,XX,-9,-12,+(9q12q). Both the established cell line and the patient's uncultured blast cells share the same phenotypic markers. They both lack T-cell markers. They fail to form sheep erythrocyte rosettes and do not react with T-cell-specific antisera (TH1-, HTL-), nor do they possess B-cell markers. They do not form rosettes with erythrocytes sensitized with complement, and they are surface immunoglobulin negative. However, they do possess an HLA-D-related glycoprotein complex of 23,000 to 30,000 daltons, an la-like antigen. Thus, LAZ 221 shares the phenotype of the patient's uncultured blasts and is a cell line representative of about 75% of all human acute lymphocytic leukemias. In this respect it differs from previously described human hematopoietic cell lines.
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82
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Evans RL, Lazarus H, Penta AC, Schlossman SF. Two functionally distinct subpopulations of human T cells that collaborate in the generation of cytotoxic cells responsible for cell-mediated lympholysis. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 1978; 120:1423-8. [PMID: 147908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A human thymus-dependent differentiation antigen, TH2 was defined by a rabbit anti-human T cell serum absorbed with autologous B lymphoblasts and leukemic cells bearing T cell markers from a patient with chronic lymphocytic leukemia. Anti-TH2 reacted specifically with thymus-derived lymphoid cells and exhibited two distinct profiles of reactivity with normal peripheral T cells as detected by indirect immunofluorescence on a FACS I. Isolation of strongly reactive, TH2+, from weakly reactive, TH2- T cells by fluorescence-activated cell sorting revealed that the TH2+ subset contained most of the killer activity in cell-mediated lympholysis (CML), but had a diminished response in MLC and a suboptimal or negligible proliferative response to soluble antigens (mumps, PPD, tetanus toxoid). In contrast, the TH2- subset contained markedly less killer activity but amplified cytotoxicity by TH2+ cells and exhibited a proliferative response to both alloantigen and soluble antigens that was often significantly greater than the response by unseparated T cells. The relevance of these findings to previously described human T cell subsets and to functional subpopulations of murine T cells is discussed.
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83
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Rosowsky A, Beardsley GP, Ensminger WD, Lazarus H, Yu CS. Methotrexate analogues. 11. Unambiguous chemical synthesis and in vitro biological evaluation of alpha- and gamma-monoesters as potential prodrugs. J Med Chem 1978; 21:380-6. [PMID: 565818 DOI: 10.1021/jm00202a013] [Citation(s) in RCA: 37] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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84
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Iglehart JK, York RM, Modest AP, Lazarus H, Livingston DM. Cystine requirement of continuous human lymphoid cell lines of normal and leukemic origin. J Biol Chem 1977; 252:7184-91. [PMID: 903356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
A number of continuous, human lymphoid cell lines from healthy and leukemic donors have been studied. Those from healthy individuals were found to be cystine prototrophs (cys+), while those from leukemic donors were observed to be cystine auxotrophs (cys-). The former can grow in either cystine or cystathionine-containing media. The latter grow only in cystine-containing medium. The former contain readily measurable levels of cystathionase, the last enzyme in the mammalian cysteine biosynthetic pathway, while the latter contain much less of this activity. The apparent molecular weight, overall charge, pH versus activity, Km, and [pyridoxal phosphate] versus activity properties of the enzyme from both cell types were indistinguishable. No soluble cystathionase inhibitor could be detected in cys- cell lines. Thus, it is reasonable to hypothesize that those leukemic cell lines studied synthesize less active cystathionase protein than their cys+ counterparts and that this difference in enzyme production underlies the differential growth properties in cystathionine-containing medium.
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85
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Lazarus H, Raso V, Samy TS. In vitro inhibition of human leukemic cells (CCRF-CEM) by agarose-immobilized neocarzinostatin. Cancer Res 1977; 37:3731-6. [PMID: 143343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Neocarzinostatin (NCS) is an acidic protein (molecular weight, 10,700) isolated from Streptomyces carzinostaticus that has antitumor activity both in model rodent systems and in humans. In vitro it inhibits the growth of a human lymphoblastic leukemic cell line (CCRF-CEM) at a very low concentration (the amount of drug that causes a 50% inhibition of growth compared to control cultures as extrapolated from a dose-response curve (ID50), 2.4 X 10(-9) M). We covalently coupled NCS to the N-hydroxysuccinimide ester of agarose and obtained a product that, by a variety of biochemical and immunological criteria, has been demonstrated to be devoid of any free or loosely bound NCS. Agarose-bound NCS, which is unable to enter cells because of its size, retains a significant amount of inhibitory activity (ID50, 6 to 15 X 10(-9) M) and is also capable of inhibiting tritiated deoxythymidine incorporation into CCRF-CEM cells. Since agarose-bound NCS cannot enter mammalian cells, the above findings indicate that NCS is able to exert its toxic effects by binding to or reacting with receptors on the cell membrane.
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86
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Chaykovsky M, Hirst M, Lazarus H, Martinelli JE. Methotrexate analogues. 9. Synthesis and biological properties of some 8-alkyl-7,8-dihydro analogues. J Med Chem 1977; 20:1323-7. [PMID: 409842 DOI: 10.1021/jm00220a019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A series of 8-alkyl-7,8,-dihydromethotrexate analogues was prepared by direct alkylation of 7,8-dihydromethotrexate, after pilot studies were performed with simpler pteridines. These compounds are tested for in vitro inhibitory activity against Lactobacillus casei and as enzyme inhibitors against dihydrofolate reductase and thymidylate synthetase derived from this organism. All of the analogues were less inhibitory toward dihydrofolate reductase than was methotrexate but were more inhibitory toward thymidylate synthetase. The analogues were also evaluated for in vitro inhibitory activity against the CCRF-CEM human lymphoblastic leukemia cells. In vivo against the L-1210 leukemia in mice, several of the analogues exhibited some antileukemic activity.
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87
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Iglehart JK, York RM, Modest AP, Lazarus H, Livingston DM. Cystine requirement of continuous human lymphoid cell lines of normal and leukemic origin. J Biol Chem 1977. [DOI: 10.1016/s0021-9258(19)66953-x] [Citation(s) in RCA: 44] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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88
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Rosowsky A, Ensminger WD, Lazarus H, Yu CS. Methotrexate analogues. 8. Synthesis and biological evaluation of bisamide derivatives as potential prodrugs. J Med Chem 1977; 20:925-30. [PMID: 406398 DOI: 10.1021/jm00217a012] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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89
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Samy TS, Hu JM, Meienhofer J, Lazarus H, Johnson RK. A facile method of purification of neocarzinostatin, an antitumor protein. J Natl Cancer Inst 1977; 58:1765-8. [PMID: 140942 DOI: 10.1093/jnci/58.6.1765] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A three-step column chromatographic method for the purification of neocarzinostatin (NCS) from a crude preparation was described. The purified material was homogeneous by acrylamide gel electrophoresis, isoelectric focusing, amino terminal analysis, and immunologic criteria. Purified NCS was 40 times as active in the inhibition of growth of Sarcina lutea and twice as active against CCRF-CEM human leukemia cells in vitro as was the starting material. When assayed against P388 and L1210 mouse leukemias in vivo, the purified material showed a median increase in life-span of 119 and 72%, respectively.
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90
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Evans RL, Breard JM, Lazarus H, Schlossman SF, Chess L. Detection, isolation, and functional characterization of two human T-cell subclasses bearing unique differentiation antigens. J Exp Med 1977; 145:221-33. [PMID: 137269 PMCID: PMC2180580 DOI: 10.1084/jem.145.1.221] [Citation(s) in RCA: 119] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A heterologous antihuman T-cell serum (anti-TH1), raised against purified peripheral T cells, and absorbed with an autologous Ig+ line, was shown to bind specifically to T- but not to B-lymphoid cells by both a complement-dependent cytotoxic assay and indirect immunofluorescence. Whereas 90% fetal thymocytes and thymocytes were killed by anti-TH1 and complement, a consistently restricted population (50-60%) of peripheral T cells from several normal donors were lysed, indicating that anti-TH1 is directed against one or more thymus-specific antigens which are lost or reduced on a subpopulation of human T cells in the periphery. Functional analysis of the unreactive (TH1-) and reactive (TH1+) T-cell subclasses demonstrated that TH1- cells mounted a good proliferative response to a battery of specific soluble antigens (mumps, PPD, tetanus toxoid) but neither responded in MLC, nor elaborated LMF in response to tetanus toxoid. In contrast TH1+ cells proliferated in MLC and elaborated LMF but did not respond by 3H-incorporation to soluble antigens. The relevance of these findings to human T-cell functions in vivo and to previously described functional subclasses of murine T cells is discussed.
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91
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Grieco PA, Noguez JA, Masaki Y, Hiroi Y, Nishizawa M, Rosowsky A, Oppenheim S, Lazarus H. Synthesis of mono- and bifunctional alpha-methylene lactone systems as potential tumor inhibitors. J Med Chem 1977; 20:71-6. [PMID: 264567 DOI: 10.1021/jm00211a014] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Synthetic nono- and bifunctional alpha-methylene lactone derivatives including deoxyvernolepin and kihydrodeoxyvernolepin were tested as inhibitors of the growth of CCRF-CEM human lymphoblastic leukemia cells in culture. The range of ID-50 values for compounds 1-7 (ca. 10(-5)-10(-6)M) was roughly comparable to the doses observed earlier in the CCRF-CEM cell system with synthetic alpha-methylene-gamma-butyrolactones. Of significance is that dihydrodeoxyvernolepin and deoxyvernolepin were at least an order of magnitude more active than natural vernolepin.
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92
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Rosowsky A, Lazarus H, Yamashita A. Nucleosides. 1. 9-(3'-Alkyl-3'-deoxy-beta-D-ribofuranosyl)adenines as lipophilic analogues of cordycepin. Synthesis and preliminary biological studies. J Med Chem 1976; 19:1265-70. [PMID: 1087343 DOI: 10.1021/jm00233a001] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A series of lipophilic 9-(3'-alkyl-3'-deoxy-beta-D-ribofuranosyl)adenines of increasing chain length was synthesized from the corresponding branched sugars via titanium chloride catalyzed ribosylation of chloromercuri-6-benzamidopurine. Enhanced growth inhibitory activity was observed against (CCRF-CEM human lymphoblastic leukemia cells in culture as the length of the alkyl side chain in the sugar and the resultant lipophilic character of the nucleoside were increased. Experiments involving incorporation of radiolabeled uridine, thymidine, and leucine revealed that in contrast to cordycepin (1) the 3'-n-butyl and 3'-n-hexyl analogues 5 and 6 markedly inhibit not only RNA synthesis but DNA and protein synthesis as well.
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93
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Desai LS, Lazarus H, Morrissey GW, Wulff UC, Foley GE, Shwachman H. Differences in the frequency distribution of DNA and dry mass per cell in lymphocytes derived from cystic fibrosis patients. Haematologica 1976; 61:157-69. [PMID: 820605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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94
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Forget BG, Hillman DG, Lazarus H, Barell EF, Benz ej JR, Caskey CT, Huisman TH, Schroeder WA, Housman D. Absence of messenger RNA and gene DNA for beta-globin chains in hereditary persistence of fetal hemoglobin. Cell 1976; 7:323-9. [PMID: 947544 DOI: 10.1016/0092-8674(76)90161-6] [Citation(s) in RCA: 62] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The relative amounts of alpha-amd beta-globin mRNA and globin gene DNA were measured in reticulocyte RNA and lymphocyte DNA of an individual with homozygous hereditary persistence of fetal hemoglobin whose red blood cells contain 100% fetal hemoglobin (hb F: alpha2gamma2.) Molecular hybridization assays used as probes full-length DNA copies of human alpha- and beta-globin messenger RNA. The results of these hybridization assays demonstrated the expected amounts of alpha-globin mRNA and gene DNA, but absence of beta-globin mRNA and absence of beta-globin gene DNA. In the individual studied, hereditary persistence of fetal hemoglobin is associated with total deletion of the beta-globin structural gene.
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95
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Hasson HM, Nicoloff D, Ford CR, Lazarus H, O'Donoghue JB, Powell JR. A new sutureless technique for skin closure. ARCHIVES OF SURGERY (CHICAGO, ILL. : 1960) 1976; 111:83-4. [PMID: 1106358 DOI: 10.1001/archsurg.1976.01360190085017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A sutureless wound-closure device was used in 150 patients. The average time spent to effect skin closure was reduced; removal was easy; skin apposition was satisfactory; and patient response was favorable. Sutureless tape closures eliminate the disadvantages of invasive skin closures. The device described provides secure tape adhesion to the skin and does not cover the wound. It can be easily applied, adjusted, and removed, in addition to serving as a protective splint to the healing wound. This method can reduce operative time of skin closure with highly satisfactory cosmetic results.
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96
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Livingston DM, Ferguson C, Gollogly R, Lazarus H. Accumulation of cystine auxotrophic thymocytes accompanying type C viral leukemogenesis in the mouse. Cell 1976; 7:41-7. [PMID: 181139 DOI: 10.1016/0092-8674(76)90253-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Certain continuous lymphoid and myeloid tumor cell lines of rodent origin are unable to grow in tissue culture in the absence of pre-formed L-cystine (CYS). In contrast, three NZB murine lymphoid cell lines obtained from NZB mice free of hematopoietic neoplasm can grow as well in cystine-deficient media containing L-cystathionine (CSN), the immediate precursor of CYS in the biosynthetic pathway, as in cystine sufficient medium. The former class of cells is, therefore, CYS auxotrophs (CYS-) and the latter CYS prototrophs (CYS+). Compared to CYS+ cells, the CYS- lines appear to be relatively deficient in the enzyme cystathionase, which catalyzes the cleavage of CSN to CYS and alpha-ketobutyrate. Using protein synthetic capacity as a criterion, normal thymocytes from mixed-bred Swiss mice behave like CYS prototrophs, while those from littermates bearing Moloney type C virus-induced thymic tumors behave like CYS auxotrophs. The former are also characterized by substantially higher levels of cystathionase than the latter. Extracts of thymocytes from tumor-free AKR mouse thymus are also characterized by higher levels of cystathionase activity than extracts of spontaneous AKR thymomas. Exogenous in vitro type C virus infection of a CYS+ cell results in vigorous virus production but no concomitant reduction in cystathionase activity. Thus viral replication alone in any random lymphoid cell is not sufficient to alter the enzyme level. The data therefore suggests that CYS auxotrophy may closely accompany neoplastic transformation of certain hematopoietic cells in vivo, including that induced by certain "thymic" type C viruses.
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97
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Sengupta SK, Tinter SK, Lazarus H, Brown BL, Modest EJ. 7-substituted actinomycin D analogs. Chemical and growth-inhibitory studies. J Med Chem 1975; 18:1175-80. [PMID: 1059773 DOI: 10.1021/jm00246a001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The synthesis and biological activity of three 7-substituted actinomycin D derivatives are reported. Three such derivatives, 7-nitro-, 7-amino-, and 7-hydroxyactinomycin D, were synthesized via new methods which were first tested successfully with a chromophore model system. Of these, 7-nitro- and 7-aminoactinomycin D were assayed for growth inhibitory activity against mammalian cells (CCRF-CEM human lymphoblastic leukemia) in vitro and against the Ridgway osteogenic sarcoma and the L1210, P1534, and P388 murine leukemias in vivo. In these systems, the inhibitory activity of the 7-substituted analogs was comparable to actinomycin D. In two bacterial systems ( (L. casei and L. arabinosus) in vitro, on the other hand, these compounds showed inhibitory profiles which are distinctly different from actinomycin D. These studies demonstrate that substitution at the 7 position, which does not interfere with DNA binding, is capable of yielding experimental antitumor agents with significant activity against a variety of tumors.
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98
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Sippell WG, Antonowicz I, Lazarus H, Shwachman H. Lysosomal and mitochondrial enzyme activities in human lymphoid cell lines obtained from children with acute lymphoblastic leukemia and controls. Exp Cell Res 1975; 91:152-8. [PMID: 1055684 DOI: 10.1016/0014-4827(75)90152-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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99
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Rosowsky A, Papathanasopoulos N, Lazarus H, Foley GE, Modest EJ. Cysteine scavengers. 2. Synthetic alpha-methylenebutyrolactones as potential tumor inhibitors. J Med Chem 1974; 17:672-6. [PMID: 4525104 DOI: 10.1021/jm00253a003] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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100
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Lazarus H, Barell EF, Oppenheim BS, Krishan A. Divergent properties of two human lymphocytic cell lines isolated from a single specimen of peripheral blood. IN VITRO 1974; 9:303-10. [PMID: 4377927] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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