Arzneimittelforschung 1999; 49(11): 970-975
DOI: 10.1055/s-0031-1300535
Originalarbeit
Editio Cantor Verlag Aulendorf (Germany)

Study of Heterogeneity of Lectins in Mistletoe Preparations by Monoclonal Antibodies to Their A-Subunits

Alexander G. Tonevitsky
a   Institute of Transplantology and Artificial Organs, Moscow, Russia
,
Igor Agapov
b   State Scientific Center of Russian Federation “GNIIGenetika”, Moscow, Russia
,
Dimitry Temiakov
b   State Scientific Center of Russian Federation “GNIIGenetika”, Moscow, Russia
,
Mikhail Moisenovichc
c   Moscow State Univerisity, Biological Faculty, Moscow, Russia
,
Natalya Maluchenko
c   Moscow State Univerisity, Biological Faculty, Moscow, Russia
,
Olga Solopovaa
a   Institute of Transplantology and Artificial Organs, Moscow, Russia
,
Gudrun Würzner
d   Institute of Phytochemistry, University Witten-Herdecke, Witten, Germany
,
Uwe Pfueller
d   Institute of Phytochemistry, University Witten-Herdecke, Witten, Germany
› Author Affiliations
Further Information

Publication History

Publication Date:
28 December 2011 (online)

Summary

Monoclonal antibodies (monAbs) displaying diverse affinity to native and recombinant mistle- toe lectins A-chains (ML I-A, ML II-A, ML III-A and rML-A) have been obtained. In ac- cordance to specificity of monAb they have been classified into three groups:

1. monAb against MLI-A and MLII-A,

2. monAb against MLII-A and MLIII-A,

3. monAb against A-subunits of MLI, MLII and MLIII.

The results indicate that antigen determinants of mistletoe lectins recognized by monAb MNA4, MNA9 and MTC12 do not contain any carbohydrates. Assay of lectins in mistletoe preparations was based on enzyme-linked lectin assay to meet the requirements given in the guidelines for drug tests. In this paper a sandwich ELISA test-system is described which allows to identify each of three ML-toxins. With the detection limits below 3 ng/ml and a linear measuring range of 3−30 ng/ml, dosages of mistletoe lectins in therapeutic range can be as- sayed. The problems in mistletoe lectins determination, structural differences and nature of heterogeneity of this proteins are discussed.

Zusammenfassung

Bestimmung der Heterogenität der Lektine in Mistelpräparaten mit monoklonalen Anti-ML-A-Ketten-Antikörpern

Es werden monoklonale Antikörper (monAbs) beschrieben, die gegen die natürliche und die recombinante A-Kette in den Mistelisolektinen ML I, ML II und ML III gerichtet sind. Nach ihrer Spezifität werden die Anti-ML-A-Antikörper in drei Gruppen unterteilt:

1. monoklonale Antikörper gegen ML I-A und ML II-A

2. monoklonale Antikörper gegen ML II-A und ML III-A

3. monoklonale Antikörper gegen ML I-A, ML II-A und ML III-A

Die Ergebnisse belegen, daß die Antigen-Determinanten der Mistellektine, die von den mono- klonalen Antikörpern MNA4, MNA9 und MTC12 erkannt werden, keine Kohlenhydrat-Strukturen enthalten. Es werden ELISA-Testsysteme beschrieben, die eine direkte Bestim- mung von ML I, ML II und ML III in Lektin-Kombinationen und Lektin-Präparaten ermög-lichen. Die Nachweisgrenzen betragen 3 ng/ml und der Linearitätsbereich liegt bei 3−30 ng/ ml. Die Heterogenität der Mistellektine in medizinisch eingesetzten Mistel-Präparaten und ihre strukturellen Unterschiede werden diskutiert.