Human Prostatic Inhibin Suppresses Ttimor Growth and Inhibits Clonogenic Cell Survival of a Model Prostatic Adenocarcinoma, the Dunning R3327G Rat Tumor

Balakrishna L Lokeshwar, Kalpana S. Hurkadli, Anil R. Sheth, Norman L. Block

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Prostatic inhibin (PI) is a Mr 10,700 protein found in human seminal plasma and is secreted by the prostate. Recognition of alteration of PI levels in prostatic diseases prompted us to investigate its effect on an animal prostatic adenocarcinoma model, the Dunning R3327G rat tumor. PI not only inhibited in vitro growth of tumor cells but also suppressed tumor growth in vivo. A dose- dependent inhibition of both the clonogenic cell growth and rate of proliferation (DNA synthesis) was observed in tumor cell cultures incubated with purified PI. These inhibitory activities were similar in both androgen-dependent and androgen-independent Dunning tumor cell lines. A functional decapeptide of PI was also found to inhibit Dunning tumor cell colonies in a dose-dependent manner. Daily injection of purified PI into tumor-bearing rats suppressed the tumor growth. A 58% reduction in tumor weight and a 2-fold reduction in tumor growth rate were observed over a 15-day treatment period. Continued treatment with PI significantly suppressed the tumor growth rate by nearly 3-fold. These findings clearly demonstrate a potential application of PI for treating human prostatic adenocarcinoma.

Original languageEnglish (US)
Pages (from-to)4855-4859
Number of pages5
JournalCancer Research
Volume53
Issue number20
StatePublished - Jan 1 1993
Externally publishedYes

Fingerprint

Inhibins
Cell Survival
Adenocarcinoma
Growth
Neoplasms
Androgens
Prostatic Diseases
Semen
Tumor Burden
Tumor Cell Line
Prostate
Cell Culture Techniques
Injections
DNA

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this

Human Prostatic Inhibin Suppresses Ttimor Growth and Inhibits Clonogenic Cell Survival of a Model Prostatic Adenocarcinoma, the Dunning R3327G Rat Tumor. / Lokeshwar, Balakrishna L; Hurkadli, Kalpana S.; Sheth, Anil R.; Block, Norman L.

In: Cancer Research, Vol. 53, No. 20, 01.01.1993, p. 4855-4859.

Research output: Contribution to journalArticle

@article{15eb58506e0946c3aad1fc09e501a005,
title = "Human Prostatic Inhibin Suppresses Ttimor Growth and Inhibits Clonogenic Cell Survival of a Model Prostatic Adenocarcinoma, the Dunning R3327G Rat Tumor",
abstract = "Prostatic inhibin (PI) is a Mr 10,700 protein found in human seminal plasma and is secreted by the prostate. Recognition of alteration of PI levels in prostatic diseases prompted us to investigate its effect on an animal prostatic adenocarcinoma model, the Dunning R3327G rat tumor. PI not only inhibited in vitro growth of tumor cells but also suppressed tumor growth in vivo. A dose- dependent inhibition of both the clonogenic cell growth and rate of proliferation (DNA synthesis) was observed in tumor cell cultures incubated with purified PI. These inhibitory activities were similar in both androgen-dependent and androgen-independent Dunning tumor cell lines. A functional decapeptide of PI was also found to inhibit Dunning tumor cell colonies in a dose-dependent manner. Daily injection of purified PI into tumor-bearing rats suppressed the tumor growth. A 58{\%} reduction in tumor weight and a 2-fold reduction in tumor growth rate were observed over a 15-day treatment period. Continued treatment with PI significantly suppressed the tumor growth rate by nearly 3-fold. These findings clearly demonstrate a potential application of PI for treating human prostatic adenocarcinoma.",
author = "Lokeshwar, {Balakrishna L} and Hurkadli, {Kalpana S.} and Sheth, {Anil R.} and Block, {Norman L.}",
year = "1993",
month = "1",
day = "1",
language = "English (US)",
volume = "53",
pages = "4855--4859",
journal = "Cancer Research",
issn = "0008-5472",
publisher = "American Association for Cancer Research Inc.",
number = "20",

}

TY - JOUR

T1 - Human Prostatic Inhibin Suppresses Ttimor Growth and Inhibits Clonogenic Cell Survival of a Model Prostatic Adenocarcinoma, the Dunning R3327G Rat Tumor

AU - Lokeshwar, Balakrishna L

AU - Hurkadli, Kalpana S.

AU - Sheth, Anil R.

AU - Block, Norman L.

PY - 1993/1/1

Y1 - 1993/1/1

N2 - Prostatic inhibin (PI) is a Mr 10,700 protein found in human seminal plasma and is secreted by the prostate. Recognition of alteration of PI levels in prostatic diseases prompted us to investigate its effect on an animal prostatic adenocarcinoma model, the Dunning R3327G rat tumor. PI not only inhibited in vitro growth of tumor cells but also suppressed tumor growth in vivo. A dose- dependent inhibition of both the clonogenic cell growth and rate of proliferation (DNA synthesis) was observed in tumor cell cultures incubated with purified PI. These inhibitory activities were similar in both androgen-dependent and androgen-independent Dunning tumor cell lines. A functional decapeptide of PI was also found to inhibit Dunning tumor cell colonies in a dose-dependent manner. Daily injection of purified PI into tumor-bearing rats suppressed the tumor growth. A 58% reduction in tumor weight and a 2-fold reduction in tumor growth rate were observed over a 15-day treatment period. Continued treatment with PI significantly suppressed the tumor growth rate by nearly 3-fold. These findings clearly demonstrate a potential application of PI for treating human prostatic adenocarcinoma.

AB - Prostatic inhibin (PI) is a Mr 10,700 protein found in human seminal plasma and is secreted by the prostate. Recognition of alteration of PI levels in prostatic diseases prompted us to investigate its effect on an animal prostatic adenocarcinoma model, the Dunning R3327G rat tumor. PI not only inhibited in vitro growth of tumor cells but also suppressed tumor growth in vivo. A dose- dependent inhibition of both the clonogenic cell growth and rate of proliferation (DNA synthesis) was observed in tumor cell cultures incubated with purified PI. These inhibitory activities were similar in both androgen-dependent and androgen-independent Dunning tumor cell lines. A functional decapeptide of PI was also found to inhibit Dunning tumor cell colonies in a dose-dependent manner. Daily injection of purified PI into tumor-bearing rats suppressed the tumor growth. A 58% reduction in tumor weight and a 2-fold reduction in tumor growth rate were observed over a 15-day treatment period. Continued treatment with PI significantly suppressed the tumor growth rate by nearly 3-fold. These findings clearly demonstrate a potential application of PI for treating human prostatic adenocarcinoma.

UR - http://www.scopus.com/inward/record.url?scp=0027428971&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027428971&partnerID=8YFLogxK

M3 - Article

C2 - 8402673

AN - SCOPUS:0027428971

VL - 53

SP - 4855

EP - 4859

JO - Cancer Research

JF - Cancer Research

SN - 0008-5472

IS - 20

ER -