Skip to main content
Log in

Molecular mechanisms of endotoxin activity

  • Mini-review
  • Published:
Archives of Microbiology Aims and scope Submit manuscript

Abstract

Endotoxin (lipopolysaccharide, LPS), a constitutent of the outer membrane of the cell wall of gramnegative bacteria, exerts a wide variety of biological effects in humans. This review focuses on the molecular mechanisms underlying these activities and discusses structure-function relationships of the endotoxin molecule, its interaction with humoral and cellular receptors involved in cell activation, and transmembrane and intra-cellular signal transduction pathways.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Abbreviations

GPI :

Glycosyl phosphatidylinositol

HDL :

High-density lipoproteins

IL :

Interleukin

KDO :

2-Keto-3-deoxyoctonic acid

LPS :

Lipopolysaccharide

dLPS :

Deacylated LPS

LBP :

LPS-binding protein

MAPK :

Mitogen-activated protein kinase

PTK :

Protein tyrosine kinase

TNF :

Tumor necrosis factor

References

  • Bazil V, Horejsi V, Baudys, M, Kristofova H, Strominger JL, Kostka W, Hilgert I (1986) Biochemical characterization of a soluble form of the 53-kDa monocyte surface antigen. Eur J Immunol 16:1583–1589

    PubMed  CAS  Google Scholar 

  • Beaty CD, Franklin TL, Uehara Y, Wilson CB (1994) Lipopolysaccharide-induced cytokine production in human monocytes: role of tyrosine phosphorylation in transmembrane signal transduction. Eur J Immunol 24:1278–1284

    PubMed  CAS  Google Scholar 

  • Blenis J (1993) Signal transduction via the MAP kinases: proceed at your own RSK. Proc Natl Acad Sci USA 90:5889–5892.

    Article  PubMed  CAS  Google Scholar 

  • Brandenburg K, Mayer, H, Koch MHJ, Weckesser J, Rietschel ET, Seydel U (1993) Influence of the supramolecular structure of free lipid A on its biological activity, Eur J Biochem 218: 555–563

    Article  PubMed  CAS  Google Scholar 

  • Chen TY, Lei MG, Suzuki T, Morrison DC (1992) Lipopolysaccharide receptors and signal transduction pathways in mononuclear phagocytes, Curr Top Microbiol Immunol 181:169–188

    PubMed  CAS  Google Scholar 

  • Christ WJ, Asano O, Robidoux ALC, Perez M, Wang Y, Dubuc GR, Gavin WE, Hawkins LD, McGuinness PD, Mullarkey MA, Lewis MD, Kishi Y, Kawata T, Bristol JR, Rose JR, Rossignol DP, Kobayashi S, Hishinuma I, Kimura A, Asakawa N, Katayama K, Yamatsu I (1995) E5531, a pure endotoxin antagonist of high potency. Science 268:80–83

    Article  PubMed  CAS  Google Scholar 

  • Cordle SR, Donald R, Read MA, Hawiger J (1993) Lipopolysaccharide induces phosphorylation of MAD3 and activation of c-Rel and related NF-kB proteins in human monocytic THP-1 cells, J Biol Chem 268:11803–11810.

    PubMed  CAS  Google Scholar 

  • Daniel-Issakani S, Spiegel AM, Strulovici B (1989) Lipopolysaccharide response is linked to the GTP binding protein, Gi2, in the promonocytic cell line U937. J Biol Chem 264:20240–20247

    PubMed  CAS  Google Scholar 

  • Flegel WA, Baumstark MW, Weinstock C, Berg A, Northoff H (1993) Prevention of endotoxin-induced monokine release by human low-and high-density lipoproteins and by apolipoprotein A-I. Infect Immun 61:5140–5146

    PubMed  CAS  Google Scholar 

  • Freudenberg AM, Keppler D, Galanos C (1986) Requirement for lipopolysaccharide-responsive macrophages in galactosamineinduced sensitization to endotoxin. Infect Immun 51:891–895

    PubMed  CAS  Google Scholar 

  • Frey EA, Miller DS, Jahr TG, Sundan A, Bazil V, Espevik T, Finlay BB, Wright SD (1992) Soluble CD14 participates in the response of cells to lipopolysaccharide. J Exp Med 176:1665–1671

    Article  PubMed  CAS  Google Scholar 

  • Galanos C, Lüderitz O, Rietschel ET, Westphal O, Brade H, Brade L, Freudenberg MA, Schade UF, Imoto M, Yoshimura H, Kusumoto S, Shiba T (1985) Synthetic andEscherichia coli free lipid A express identical endotoxic activities. Eur J Biochem 148:1–5

    Article  PubMed  CAS  Google Scholar 

  • Gallay P, Heumann D, Le Roy D, Barras C, Glauser M-P (1994) Mode of action of anti-lipopolysaccharide-binding protein antibodies for prevention of endotoxemic shock in mice. Proc Natl Acad Sci USA 91:7922–7926

    Article  PubMed  CAS  Google Scholar 

  • Geng Y, Zhang B, Lotz M (1993) Protein tyrosine kinase activation is required for lipopolysaccharide induction of cytokines in human blood monocytes. J Immunol 151:6692–6700

    PubMed  CAS  Google Scholar 

  • Hailman E, Lichenstein HS, Wurfel MM, Miller DS, Johnson DA, Kelley M, Busse LA, Zukowski MM, Wright SD (1994) Lipopolysaccharide (LPS)-binding protein accelerates the binding of LPS to CD14. J Exp Med 179:269–277

    Article  PubMed  CAS  Google Scholar 

  • Han J, Lee J-D, Bibbs L, Ulevitch RJ (1994) A MAP kinase targeted by endotoxin and hypersmolarity in mammalian cells. Science 265:808–811

    Article  PubMed  CAS  Google Scholar 

  • Heine H, Brade H, Kusumoto S, Kusama T, Rietschel ET, Flad HD, Ulmer AJ (1994a) Inhibition of LPS binding on human monocytes by phosphonooxyethyl analogs of Lipid A. J Endotoxin Res 1:14–20

    CAS  Google Scholar 

  • Heine H, Ulmer AJ, Flad HD, Hauschildt S (1994b) Lipopolysaccharide-induced change of phosphorylation of cytosolic proteins in human monocytes (abstract). Immunobiology 191:126

    Google Scholar 

  • Helander MI, Lindner B, Brade H, Altmann K, Lindberg AA, Rietschel ET, Zähringer U (1988) Chemical structure of the lipopolysaccharide ofHaemophilus influenzae strain I-69 Rd-/b+. Description of a novel deep-rough chemotype. Eur J Biochem 177:483–492

    Article  PubMed  CAS  Google Scholar 

  • Hoess A, Watson S, Siber GR, Liddington R (1993) Crystal structure of an endotoxin-neutralizing protein from horseshoe crab Limulus anti-LPS factor at 1.5 Å resolution. EMBO J 12:3351–3356

    PubMed  CAS  Google Scholar 

  • Joseph CK, Wright SD, Bornmann WG, Randolph JT, Kumar ER, Bittmann R, Liu J, Kolesnick RN (1994) Bacterial lipopolysaccharide has structural similiarity to ceramide and stimulates ceramide-activated protein kinase in myeloid cells. J Biol Chem 269:17606–17610

    PubMed  CAS  Google Scholar 

  • Juan TS-C, Hailman E, Kelley MJ, Busse LA, Davy E, Empig CJ, Narhi LO, Wright SD, Lichenstein HS (1995) Identification of a lipopolysaccharide binding domain in CD14 between amino acids 57 and 64. J Biol Chem 270:5219–5224

    Article  PubMed  CAS  Google Scholar 

  • Kirkland TN, Finley F, Leturcq D, Moriarty A, Lee JD, Ulevitch RJ, Tobias PS (1993) Analysis of lipopolysaccharide binding by CD14. J Biol Chem 268:24818–24823

    PubMed  CAS  Google Scholar 

  • Kitchens R, Munford R (1995) Enzymatically deacylated lipopolysaccharide (LPS) can antagonize LPS at multiple sites in the LPS recognition pathway. J Biol Chem 270:9904–9910

    Article  PubMed  CAS  Google Scholar 

  • Lee JD, Kravchenko V, Kirkland TN, Han J, Mackman N, Moriarty A, Leturcq DJ, Tobias PS, Ulevitch RJ (1993) Glycosylphosphatidylinositol-anchored or integral membrane forms of CD14 mediate identical cellular responses to endotoxin. Proc Natl Acad Sci USA 90:9930–9934

    Article  PubMed  CAS  Google Scholar 

  • Loppnow H (1994) LPS, recIL1 and smooth muscle cell-IL1 activate vascular cells by specific mechanisms. In: Levin, J, Van Deventer SJH, Van der Poll T, Sturk A (eds) Bacterial endotoxins: basic science to anti-sepsis strategies. Wiley-Liss, New York, pp 309–321

    Google Scholar 

  • Loppnow H, Brade H, Dürrbaum I, Dinarello CA, Kusumoto S, Rietschel ET, Flad HD (1989) Interleukin 1 induction capacity of defined lipopolysaccharide partial structures. J Immunol 142:3229–3238

    PubMed  CAS  Google Scholar 

  • Loppnow H, Libby P, Freudenberg M, Krauss JH, Weckesser J, Mayer H (1990) Cytokine induction by lipopolysaccharide (LPS) corresponds to lethal toxicity and is inhibited by nontoxicRhodobacter capsulatus LPS. Infect Immun 58:3743–3750

    PubMed  CAS  Google Scholar 

  • Müller JM, Ziegler-Heitbrock HWL, Baeuerle PA (1993) Nuclear factor kappa B, a mediator of lipopolysaccharide effects. Immunobiology 187:233–256

    PubMed  Google Scholar 

  • Nogare D (1991) Southwestern internal medicine conference: septic shock. Am J Med Sci 302:50–65

    Article  Google Scholar 

  • Pfeiffer R (1892) Untersuchungen über das Choleragift. Z Hyg 11:393–412

    Article  Google Scholar 

  • Qureshi N, Takayama K, Kurtz R (1991) Diphosphoryl lipid A obtained from the nontoxic lipopolysaccharide ofRhodopseudomonas sphaeroides is an endotoxin antagonist in mice. Infect Immun 59:441–444

    PubMed  CAS  Google Scholar 

  • Rietschel ET, Kirikae T, Schade FU, Mamat U, Schmidt G, Loppnow H, Ulmer AJ, Zähringer U, Seydel U, Di Padova F, Schreier M, Brade H (1994) Bacterial endotoxin: molecular relationships of structure to activity and function. FASEB J 8:217–225

    PubMed  CAS  Google Scholar 

  • Schletter J, Brade H, Brade L, Krüger C, Loppnow H, Kusumoto S, Rietschel ET, Flad HD, Ulmer AJ (1995) Binding of lipopolysaccharide (LPS) to an 80-kDa membrane protein of human cells is mediated by soluble CD14 and LPS-binding protein. Infect Immun 63:2576–2580

    PubMed  CAS  Google Scholar 

  • Schumann RR, Leong SR, Flaggs GW, Gray PW, Wright SD, Mathison JC, Tobias PS, Ulevitch RJ (1990) Structure and function of lipopolysaccharide binding protein. Science 249:1429–1431

    Article  PubMed  CAS  Google Scholar 

  • Seydel U, Brandenburg K, Rietschel ETh (1994) A case for an endotoxic conformation. In: Levin J, van Deventer SJH, van der Poll T, Sturk A (eds) Bacterial endotoxins: basic science to anti-sepsis strategies. Wiley-Liss, New York, pp 17–30

    Google Scholar 

  • Stefanova I, Corcoran ML, Horak EM, Wahl LM, Bolen JB, Horak ID (1993) Lipopolysaccharide induces activation of CD14-associated protein tyrosine kinase p53/56lyn. J Biol Chem 268:20725–20728

    PubMed  CAS  Google Scholar 

  • Takayama K, Mitchell DH, Din ZZ Mukerjee P, Li C, Coleman DL (1994) Monomeric Re lipopolysaccharide fromEscherichia coli is more active than the aggregated form in theLimulus amebocyte lysate assay and in inducing egr-1 mRNA in murine peritoneal macrophages. J Biol Chem 269:2241–2244

    PubMed  CAS  Google Scholar 

  • Tobias PS, Soldau K, Hatlen LE, Schumann RR, Einhorn G, Mathison JC, Ulevitch RJ (1992) Lipopolysaccharide binding protein (abstract) J Cell Biochem 16C:151

    Google Scholar 

  • Ulevitch RJ, Tobias PS (1994) Recognition of endotoxin by cells leading to transmembrane signaling. Curr Opin Immunol 6:125–130

    Article  PubMed  CAS  Google Scholar 

  • Ulmer AJ, Feist W, Heine H, Kirikae T, Kirikae F, Kusumoto S, Kusama T, Brade H, Schade, U, Rietschel ET, Flad H-D (1992) Modulation of endotoxin-induced monokine release in human monocytes by lipid A partial structures that inhibit binding of125I-lipopolysaccharide, Infect Immun 60:5145–5152

    PubMed  CAS  Google Scholar 

  • Viriyakosol S, Kirkland TN (1995) A region of human CD14 required for lipopolysaccharide binding. J Biol Chem 270:361–368

    Article  PubMed  CAS  Google Scholar 

  • Vogel SN, Hogan MM (1990) Role of cytokines in endotoxin-mediated host responses. In: Oppenheim JJ, Shevach EM (eds) Immunophysiology: the role of cells and cytokines in immunity and inflammation. Oxford University Press, Oxford, pp 238–252

    Google Scholar 

  • Weinstein SL, Sanghera JS, Lemke K, DeFranco AL, Pelech SL (1992) Bacterial lipopolysaccharide induces tyrosine phosphorylation and activation of mitogen-activated protein kinases in macrophages. J Biol Chem 267:14955–14962

    PubMed  CAS  Google Scholar 

  • Wright SD (1991) Multiple receptors for endotoxin. Curr Opin Immunol 3:83–90

    Article  PubMed  CAS  Google Scholar 

  • Wrigth SD, Ramos RA, Tobias PS, Ulevitch RJ, Mathison JC (1990) CD14, a receptor for complexes of lipopolysaccharide (LPS) and LPS binding protein. Science 249:1431–1433

    Article  Google Scholar 

  • Wurfel MM, Kunitake ST, Lichenstein H, Kane JP, Wright SD (1994) Lipopolysaccharide (LPS)-binding protein is carried on lipoproteins and acts as a cofactor in the neutralization of LPS. J Exp Med 180:1025–1035

    Article  PubMed  CAS  Google Scholar 

  • Zähringer U, Lindner B, Rietschel ET (1994), Molecular structure of lipid A, the endotoxic center of bacterial lipopolysaccharides. Adv Carbohydr Chem Biochem 50:211–276

    Article  PubMed  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Schletter, J., Heine, H., Ulmer, A.J. et al. Molecular mechanisms of endotoxin activity. Arch. Microbiol. 164, 383–389 (1995). https://doi.org/10.1007/BF02529735

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02529735

Key words

Navigation