Summary
In order to be effective, cephalosporins must penetrate the outer membrane of bacteria to reach the β-lactam target enzymes, avoid hydrolysis by β-lactamases and bind to the bacterial penicillin-binding proteins (PBPs) corresponding to the peptidases responsible for catalysing the cross-linking of peptidoglycan. Resistance to cephalosporins can arise if the targets are modified, or if they are protected by other cell products (β-lactamases) or structures (permeability barriers). Target modification can involve either reduced affinity of an existing PBP or the acquisition of supplementary β-lactam-resistant PBPs. β-Lactamases are produced universally by bacteria and may be chromosomally or plasmid-mediated. Although generally species specific, chromosomal enzymes from Gram-negative bacteria can be divided into 4 main categories: chromosomal cephalosporinases (not inhibited by clavulanic acid), cefuroximases, broad spectrum β-lactamases, and β-lactamases of anaerobic species. Plasmid-mediated enzymes include 3 categories: penicillinases from Staphylococcus aureus, broad spectrum β-lactamases (e.g. TEM-1, -2; SHV-1) and extended broad spectrum β-lactamases (TEM-3, -5; SHV-2 to SHV-5). The degree of β-lactamase-mediated resistance is related to the amount of enzyme produced, the location of the enzyme and the kinetics of the enzyme’s activity. β-Lactamases of Gram-positive organisms are usually extracellular, while those of Gram-negative bacteria are retained within the cell periplasm. While synthesis of β-lactamases by streptococci is of little or no clinical importance, these enzymes play a major role in the resistance of staphylococci. The outer membrane of Gram-negative organisms constitutes a substantial permeability barrier retarding the entry of β-lactams into the cell. Nevertheless, specialised outer membrane proteins called ‘porins’ create pores in this membrane, enabling the diffusion of small aqueous solutes, such as cephalosporins. Shielding by permeability barriers is minimal in Gram-positive bacteria, as the PBPs of such organisms are located on the outer aspect of the cytoplasmic membrane.
The ever-increasing problem of bacterial resistance to antibiotics combined with the increased number of immunocompromised patients explains the upsurge of interest in the interplay between host defences and antibacterial agents. A number of difficulties and controversies are associated with the analysis of immunomodulation by antimicrobial agents. Many of these problems are a consequence of using in vitro data, which do not accurately reflect the dynamic interactions occurring in vivo. Extrapolation of data derived from experimental animal models of infection to human therapy should also be viewed with much caution. The possible occurrence of neutropenia in patients administered some β-lactam antibiotics appears to be related either to an immune-mediated process involving peripheral leucocytes or to a direct toxic effect of the drug on bonemarrow precursors. Several studies have now investigated the oxidant scavenging properties of cephalosporins. Interestingly, inhibition of neutrophil myeloperoxidase activity has been observed with cefdinir, in contrast to the significant enhancement of this activity observed with cefaclor.
Subinhibitory concentrations of some antibacterial agents can influence bacterial morphology and physiology. While few β-lactams directly interfere with the phagocyte oxidative burst, indirect enhancement by β-lactam-modified bacteria may account for the inflammatory response that may be observed during therapy with these agents. Potentiation of the oxidative burst may also be accompanied by increased bacterial susceptibility to phagocytic killing and is referred to as postantibiotic leucocyte enhancement.
Similar content being viewed by others
References
Spratt BG. Penicillin-binding proteins and the future of β-lactam antibiotics. J Gen Microbiol 1983; 129: 1247
Tipper DJ. Mode of action of β-lactam antibiotics. Pharmacol Ther 1985; 27: 1
Malouin F, Bryan LE. Modification of penicillin-binding proteins as mechanisms of β-lactam resistance. Antimicrob Agents Chemother 1986; 30: 1–5
Ubukata K, Yamashita N, Konno M. Occurrence of a β-lactaminducible penicillin-binding protein in methicillin-resistant staphylococci. Antimicrob Agents Chemother 1985; 27: 851
Dougherty TJ, Koller AE, Tomasz A. Penicillin-binding proteins of penicillin-susceptible and intrinsically resistant Neisseria gonorrhoeae. Antimicrob Agents Chemother 1980; 18: 730
Dougherty TJ, Koller AE, Tomasz A. Competition of β-lactam antibiotics for the penicillin-binding proteins of Neisseria gonorrhoeae. Antimicrob Agents Chemother 1981; 20: 109
Matsuhashi M, Takagaki Y, Maruyama IN, Tamaki S, Nishimura Y, et al. Mutants of Escherichia coli lacking highly penicillin sensitive D-alanine carboxypeptidase activity. Proceedings of the Natl Acad Sci (USA) 1977; 74: 2976
Matsuhashi M, Nakagawa J, Tomioka S, et al. Mechanism of peptidoglycan synthesis by penicillin binding proteins in bacteria and effects of antibiotics. In Mitsuhashi (Ed.) Drug resistance in bacteria- genetics, biochemistry and molecular biology, p. 297, Jpn Sci Soc Press, Tokyo, 1982
Tamura T, Imae Y, Strominger JL. Purification to homogeneity and properties of two D-alanine carboxypeptidases I from Escherichia coli. J Biol Chem 1976; 251: 414
Mirelman D. Assembly of wall peptidoglycan polymers. In Salton and Shockman (Eds) β-Lactam antibiotics, mode of action, new developments and future prospects, p. 67, Acad Press, New York, 1981
Parr TR, Bryan LE. Mechanism of resistance of an ampicillinresistant β-lactamase-negative clinical isolate of Haemophilus influenzae Type b to β-lactam antibiotics. Antimicrob Agents Chemother 1984; 25: 747
Serfass DA, Mendelman OM, Chaffin DO, Needham CA. Ampicillin resistance and penicillin-binding proteins of Haemophilus influenzae. J Gen Microbiol 1986; 132: 2855
Handwerger S, Tomasz A. Alterations in the penicillin-binding proteins of clinical and laboratory isolates of Streptococcus pneumoniae with low levels of penicillin resistance. J Infect Dis 1986; 153: 83
Kitano K, Williamson R, Tomasz A. Murine hydrolase defect in beta-lactam-tolerant mutants of Escherichia coli. FEMS Microbiol Letters 1980; 7: 133
Sabath LD, Wheeler N, Laverdier M, et al. A new type of penicillin resistance of Staphylococcus aureus. Lancet 1977; 1: 443
Tomasz A, Albino A, Zanati E. Multiple antibiotic resistance in a bacterium with suppressed autolytic system. Nat 1970; 227: 138
Abraham EP, Chain E. An enzyme from bacteria able to destroy penicillin. Nature 1940; 146: 839
Richmond MH, Sykes RB. The β-lactamases of Gram-negative bacteria and their possible physiological role. Ad Microb Physiol 1973; 9: 31–88
Bush K. Characterization of β-lactamases. Antimicrob Agents Chemother 1989; 33: 259–63
Bush K. Classification of β-lactamases: groups 1, 2a, 2b and 2′ Antimicrob Agents and Chemother 1989; 33: 264–70
Bush K. Classification of β-lactamases: groups 2c, 2d, 2e, 3 and 4. Antimicrob Agents Chemother 1989; 33: 271–76
Quinn JP. Mechanisms of resistance to β-lactam antibiotics. Hosp Formul 1989; 24: 204–15
Hamilton-Miller JMT, Ramsay J. Synergism between β-lactam antibiotics: a test of theoretical predictions made with Staphylococcus aureus. J Med Microbiol 1973; 6: 377
Zimmermann W. Penetration through the Gram-negative cell wall: a co-determinant of the efficacy of β-lactam antibiotics. Int J Clinic Pharmacol Biopharm 1979; 17
Bauernfeind A. Classification of β-lactamases. Rev Infect Dis 8 1986; (Suppl. 5): 5470–81
Sanders CC. Inducible β-lactamases and non-hydrolytic resistance mechanisms. J Antimicrob Chemother 1984; 13: 1
Medeiros AA. β-Lactamases. Br Med Bull 1984; 40: 18
Sykes RB, Matthew M. The β-lactamases of Gram-negative bacteria and their role in resistance to β-lactam antibiotics. J Antimicrob Chemother 1976; 2: 115
Cullmann W. The threat of resistance to the new oral cephalosporins. Workshop at the 5th ECCMID, Oslo, 1991. Chemother 38 1992; (Suppl. 2): 10–17
García-Rodríguez JA, Sánchez JEG, Bellido JLM, et al. Current status of bacterial resistance to third-generation cephalosporins. Diagn Microbiol and Infect Dis 1992; 15: 67–72
Wise R, Andrews JM, Hancox J. SQ 26776, a novel β-lactam: an in vitro comparison with other antimicrobial drugs. J Antimicrob Chemother 1981; 8(Suppl. E): 39
Payne DJ, Amyes SGB. Transferable resistance to extendedspectrum β-lactarns: a major threat or a minor inconvenience? J Antimicrob Chemother 1991; 27: 255–61
Williams RJ, Livermore DM, Lindridge MA, et al. Mechanisms of resistance to beta-lactam antibiotics in British isolates of Pseudomonas aeruginosa. J Med Microbiol 1984; 17: 283
Sougakoff W, Goussard S, Gerbaud G, et al. Plasmid-mediated resistance to third-generation cephalosporins caused by point mutations in TEM-type penicillinase genes. Rev Infect Dis 1988; 10: 879–84
Dyke KGH. β-Lactamases of Staphylococcus aureus. In: Hamilton-Miller and Smith, editors. Beta-lactamases, London: Academic Press, 1979: 291
Sabath LD, Garner C, Wilcox C, et al. Effect of inoculum and β-lactamase on the antistaphylococcal activity of thirteen penicillins and cephalosporins. Antimicrob Agents Chemother 1975; 8: 344
Cole M. ‘β-Lactams’ as β-lactamase inhibitors. Philos Trans R Soc Lond 1980; 289B: 207
Livermore DM, Yang YJ. β-Lactamase lability and inducer power of newer β-lactams in relation to their activity against β-lactamase inducibility mutants of Pseudomonas aeruginosa. J Infect Dis 1987; 155: 775
Bryan LE. Antimicrobial drug resistance. Acad Press, Orlando, 1984
Nikaido H. Non-specific transport through the outer membrane. In Inouye, editor. Bacterial outer membranes: biogenesis and function. New York: John Wiley & Sons, 1979: 361
Richmond MH, Clark DC, Wotton S. Indirect method for assessing the penetration of β-lactamase non-susceptible penicillins and cephalosporins in Escherichia coli strains. Antimicrob Agents Chemother 1976; 10: 215
Coulton JW, Mason P, Dorrance D. The permeability barrier of Haemophilus influenzae type b against β-lactam antibiotics. J Antimicrob Chemother 1983; 12: 435
Woodruff WA, Parr Jr TR, Hancock REW, et al. Expression in Escherichia coli and function of Pseudomonas aeruginosa outer membrane porin protein F. J Bacteriol 1986; 167: 473–79
Labro MT, Babin-Chevaye C, Hakim J. Effects of cefotaxime and cefodizime on human granulocyte functions in vitro. J Antimicrob Chemother 1986; 18: 233–37
Nielsen H. Antibiotics and human monocyte function II. Phagocytosis and oxidative metabolism. Acta Pathol Microbiol Immunol Scand 1989; 97: 447–51
Briheim G, Dahlgren C. Influence of antibiotics on formylmethionyl-leucyl-phenylalanine-induced leukocyte chemiluminescence. Antimicrob Agents and Chemother 1987; 31: 763–67
Labro MT, El Benna J. Effects of monodesethyl amodiaquine on human polymorphonuclear neutrophil function in vitro. J Antimicrob Agents Chemother 1991; 35: 824–30
Dammaco F, Halbert F, Carandente F. Antimicrobial agents as biological response modifiers (BRM) and chrono-immunomodulation: an emerging relationship. Chronobiol 1988; 15: 25–39
Ritts RE. Antibiotics as biological response modifiers. J Antimicrob Chemother 1990; 26(Suppl. C): 31–6
Labro MT. Immunomodulation by antibacterial agents. Is it clinically relevant? Drugs 1993; 45: 319–28
Neftel KA, Hauser SP, Müller MR. Inhibition of granulopoiesis in vivo and in vitro by β-lactam antibiotics. J Infect Dis 1985; 152: 90–8
Murphy MF, Metcalfe P, Grint PCA, et al. Cephalosporin-in-duced immune neutropenia. Br J Haematol 1985; 59: 9–14
Neftel KA, Hübscher U. Effects of β-lactam antibiotics on proliferating eucaryotic cells. Antimicrob Agents Chemother 1987; 31: 1657–61
Maruyama T, Kobayashi F, Uchida K, et al. Effect of antibiotics on colony formation from mouse granulocyte-macrophage progenitors (CFU-GM), megakaryocyte progenitors (CFUM) and erythrocyte progenitors (CFU-E, BFU-E) in vitro. Pharmacol Toxicol 1989; 64: 391–396
Rey D, Martin T, Albert A, et al. Cerftriaxone-induced granulopenia related to a peculiar mechanism of granulopoiesis inhibition. Am J Med 1989; 87: 591–92
Labro MT, Amit N, Babin-Chevaye C, et al. Cefodizime (HR 221) potentiation of human neutrophil oxygen-independent bactericidal activity. J Antimicrob Chemother 1987; 19: 331–41
Rodriguez AB, Hernanz A, de la Fuente M. Effect of three β-lactam antibiotics on ascorbate content, phagocytic activity and Superoxide anion production in human neutrophils. Cell Physiol Biochem 1991; 1: 170–76
Labro MT. Cefodizime as a biological response modifier: a review of its in-vivo, ex-vivo and in-vitro immunomodulatory properties. J Antimicrob Chemother 1990; 26(Suppl. C): 37–47
Ottonello L, Dallegri F, Dapino P, et al. Cytoprotection against neutrophil-delivered oxidant attack by antibiotics. Biochem Pharmacol 1991; 42: 2317–21
Labro MT, El Benna J, Jemni A. C1-983 (cefdinir) has different effects on polymorphonuclear neutrophil oxidative burst triggered by soluble and particulate stimuli. 92nd General ASM Meeting, Abstract no. D 10, p. 97, New Orleans, 1992
Labro MT, El Benna J, Charlier N, et al. Cefdinir (CI-983), a new oral amino-2-thiazolyl cephalosporin, inhibits human neutrophil myeloperoxidase in the extracellular medium but not the phagolysosome. J Immunol 1994; 152: 2447–55
Labro MT, Abdelghaffar H, Cooper R, et al. Structure-activity realtionships of new carbacephems with antioxidant properties [abstract no. 925]. Abstracts of the 33rd ICAAC, New Orleans 1993; 288
Grant M, Raeburn JA, Sutherland R, et al. Effect of two antibiotics on human granulocyte activities. J Antimicrob Chemother 1983; 11: 543–54
Van Rensburg CEJ, Anderson R, Eftychis HA, Jooné GH. Effects of cefotaxime on neutrophil and lymphocyte functions. S Afr Med J 1983; 64: 346–48
Hand WL, King-Thompson N, Holman JW. Entry of roxithromycin (RV963), imipenem, cefotaxime, trimethoprim and metronidazole into human polymorphonuclear leucocytes. Antimicrob Agents Chemother 1987; 31: 1553–57
Cuffini AM, Tullio V, Allocco A, et al. Carine NA. The entry of imipenem into human macrophages and its immunomodulating activity. J Antimicrob Chemother 1993; 32: 695–703
Chang HR, Vladoianu IR, Pechere C. Effects of ampicillin, ceftriaxone, chloramphenicol, pefloxacin and trimethoprim-sulphamethoxazole on Salmonella typhi within human monocyte-derived macrophages. J Antimicrob Chemother 1990; 26: 689–94
Van den Broek PJ. Activity of antibiotics against microorganisms ingested by mononuclear phagocytes. European J Clinic Microbiol Infect Dis 1991; 10: 114–18
Van den Broek PJ, Buys LFM, Aleman BMP. The antibacterial activity of benzylpenicillin against Staphylococcus aureus ingested by granulocytes. J Antimicrob Chemother 1990; 25: 931–40
Gemmell CG. Antibiotics and neutrophil function — potential immunomodulating activities. J Antimicrob Chemother 31 1993; (Suppl. B): 23–33
Kawana M, Kawana C, Giebink GS. Penicillin treatment accelerates middle ear inflammation in experimental pneumococcal otitis media. Infect Immun 1992 60: 1908–12
Lorian V. Low concentrations of antibiotics. J Antimicrob Chemother 1985; 15(Suppl. A): 15–26
McDonald PJ, Wetherall BL, Pruul H. Postantibiotic leukocyte enhancement: increased susceptibility of bacteria pretreated with antibiotics to activity of leukocytes. Rev Infect Dis 1981; 3: 38–44
Pruul H, McDonald PJ. Cefdinir-induced modification of the susceptibility of bacteria to the antibacterial activity of human serum and polymorphonuclear neutrophils. Eur J Clin Microbiol Infect Dis 1993; 12: 170–76
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Labro, M.T. Resistance to and Immunomodulation Effects of Cephalosporin Antibiotics. Clin. Drug Invest. 9 (Suppl 3), 31–44 (1995). https://doi.org/10.2165/00044011-199500093-00006
Published:
Issue Date:
DOI: https://doi.org/10.2165/00044011-199500093-00006