Abstract
A new antitumor and antiviral substance, KS-2, was prepared by ethanol precipitation of the hot water extract of culture mycelia of Lentinus edodes KSLE 007. It was further purified by ECTEOLA-cellulose and Sephadex G-100 column chromatography based on the interferon-inducing activity. Its homogeneity was revealed by CsCl density gradient centrifugation, electrophoresis on cellulose acetate and Sephadex G-100 and ECTEOLA-cellulose column chromatography. KS-2 is mainly composed of α-linked mannose and contains a small amount of peptide which consists of serine, threonine and alanine with residual amounts of the other amino acids. The estimated molecular weight of KS-2 is between 6.0 x 104 and 9.5 x 104. KS-2 suppressed the growth of Ehrlich as well as Sarcoma-180 tumors in mice when given either orally or intraperitoneally. It is also capable of inducing an interferon in mice when dosed orally or intraperitoneally. The acute LD50 of KS-2 was found to be extremely low, more than 12,500 mg/kg when administered orally to mice.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1079-1090 |
| Number of pages | 12 |
| Journal | Journal of Antibiotics |
| Volume | 31 |
| Issue number | 11 |
| State | Published - 1978 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Molecular Medicine
- Pharmacology
Cite this
Isolation and characterization of a new antitumor polysaccharide, KS-2, extracted from culture mycelia of Lentinus edodes. / Fujii, T.; Maeda, H.; Suzuki, Fujio; Ishida, N.
In: Journal of Antibiotics, Vol. 31, No. 11, 1978, p. 1079-1090.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Isolation and characterization of a new antitumor polysaccharide, KS-2, extracted from culture mycelia of Lentinus edodes
AU - Fujii, T.
AU - Maeda, H.
AU - Suzuki, Fujio
AU - Ishida, N.
PY - 1978
Y1 - 1978
N2 - A new antitumor and antiviral substance, KS-2, was prepared by ethanol precipitation of the hot water extract of culture mycelia of Lentinus edodes KSLE 007. It was further purified by ECTEOLA-cellulose and Sephadex G-100 column chromatography based on the interferon-inducing activity. Its homogeneity was revealed by CsCl density gradient centrifugation, electrophoresis on cellulose acetate and Sephadex G-100 and ECTEOLA-cellulose column chromatography. KS-2 is mainly composed of α-linked mannose and contains a small amount of peptide which consists of serine, threonine and alanine with residual amounts of the other amino acids. The estimated molecular weight of KS-2 is between 6.0 x 104 and 9.5 x 104. KS-2 suppressed the growth of Ehrlich as well as Sarcoma-180 tumors in mice when given either orally or intraperitoneally. It is also capable of inducing an interferon in mice when dosed orally or intraperitoneally. The acute LD50 of KS-2 was found to be extremely low, more than 12,500 mg/kg when administered orally to mice.
AB - A new antitumor and antiviral substance, KS-2, was prepared by ethanol precipitation of the hot water extract of culture mycelia of Lentinus edodes KSLE 007. It was further purified by ECTEOLA-cellulose and Sephadex G-100 column chromatography based on the interferon-inducing activity. Its homogeneity was revealed by CsCl density gradient centrifugation, electrophoresis on cellulose acetate and Sephadex G-100 and ECTEOLA-cellulose column chromatography. KS-2 is mainly composed of α-linked mannose and contains a small amount of peptide which consists of serine, threonine and alanine with residual amounts of the other amino acids. The estimated molecular weight of KS-2 is between 6.0 x 104 and 9.5 x 104. KS-2 suppressed the growth of Ehrlich as well as Sarcoma-180 tumors in mice when given either orally or intraperitoneally. It is also capable of inducing an interferon in mice when dosed orally or intraperitoneally. The acute LD50 of KS-2 was found to be extremely low, more than 12,500 mg/kg when administered orally to mice.
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M3 - Article
VL - 31
SP - 1079
EP - 1090
JO - Journal of Antibiotics
JF - Journal of Antibiotics
SN - 0021-8820
IS - 11
ER -