ADENINE PRESS

2066 Central Avenue, Schenectady, NY 12304 USA

phone: 518-456-0784; fax: 518-452-4955
office email: stone@adeninepress.com

click here to view more
click here to view more
Click here to view more
Click here to view more
Click here to view more
Contents and abstracts: Cancer Watch . Among the highlights are: Human Herpesvirus 8 (HHV-8),Green Tea and Gastric Cancer,CD138 in Soft Tissue Tumor,The Early Growth Response Protein 1 (EGR1),The Small Accelerator for Death Signaling (SADS),Surgical implants and other foreign bodies as carcinogens,Urine Test for Biomarkers Can Predict Bladder Cancer Risk ,Markers to Predict Colon Cancer Survival after Adjuvant Chemotherapy,HPV Implicated in Head and Neck Cancers,A Specific Transcription Factor Deficiency may Increase Susceptibility to Cancer,Inhibition of Vascular Endothelial Growth Factor Receptor Blocks Tumor Growth,A Novel Radiation Sensitizer for Treating Brain Metastasis,Zolendronate: A Recently Introduced Biphosphonate in Cancer Therapy ,Gene Therapy to Correct Chromosomal Fragile Site,Advances in Technology: Application of Imaging Mass Spectrometry in Mammalian Tissue,Computer-Aided Detection in Screening Mammography ,A New Role for APC Tumor Suppressor Gene,Use of Oral Contraceptives and Ovarian Cancer Risk,Progestin may Induce Apoptosis in Ovarian Cells,Long-Term Aspirin Use Reduces Risk of Ovarian Cancer

Cancer Watch April 2001

Contents and Abstracts:

For Full Text Version Just Click the Links.

News in Brief

  • Human Herpesvirus 8 (HHV-8)
  • Green Tea and Gastric Cancer
  • CD138 in Soft Tissue Tumors
  • The Early Growth Response Protein 1 (EGR1)
  • The Small Accelerator for Death Signaling (SADS)
  • Surgical implants and other foreign bodies as carcinogens

Among Smokers Women Face Higher Risks for Bladder Cancer than Men

  • New evidence suggests that women have a higher risk of developing bladder cancer than men who smoked comparable numbers of cigarettes.

Urine Test for Biomarkers Can Predict Bladder Cancer Risk

  • Analyses of biological markers of cells in urine could predict risk of bladder cancer much earlier than those obtained by conventional screening tests. Such detection at earlier stage can improve bladder cancer control.

Markers to Predict Colon Cancer Survival after Adjuvant Chemotherapy

  • Identification of specific molecular markers can be used to predict survival after chemotherapy in advance colon cancer patients. Present study shows that mutations in the repeated sequence of DNA known as microsatellite, when present along with mutation in a growth factor receptor gene, indicates a favorable outcome for adjuvant chemotherapy. Microsatellie-stable cancer with intact chromosome 18q is also another pair of molecular markers for favorable outcome.

HPV Implicated in Head and Neck Cancers

  • Human papillomavirus infection increases the risk of developing head and neck cancers, especially those of tonsils.

A Specific Transcription Factor Deficiency may Increase Susceptibility to Cancer

  • Certain enzyme systems, phase 2 enzymes that participate in metabolism of chemicals, can be induced to counteract the effect of many chemical carcinogens. A specific endogenous protein Nrf2 is found to play a central role in this chemopreventative action of the phase 2 enzymes.

Inhibition of Vascular Endothelial Growth Factor Receptor Blocks Tumor Growth

  • Vascular Endothelial Growth Factor (VEGF, also known as vascular permeability factor) is the primary stimulant for the development and maintenance of a vascular network in embryogenesis and the vascularisation of tumors. After an initial period of cell proliferation, further continuous growth requires neo-angiogenesis: the growth of new vasculature sprouting from existing vessels or its formation from circulating endothelial cells. Inhibitors of such angiogenesis are a logical choice for successful cancer treatment. After much initial enthusiasm, the direct administration of antiangiogenic substances has not fulfilled the expectations, which does not rule out the rationale of this approach. VEGF is a vascular growth factor of major importance and requires recognition by receptors. The latter have become targets for interference with angiogenesis, using selective antibodies.

A Novel Radiation Sensitizer for Treating Brain Metastasis

  • A novel chemical, motexafin gadolinium, when administered along with whole brain radiation, improves local tumor control in patients with brain metastases.

Novel Aromatase Inhibitors in Breast Cancer

  • Estrogen deprivation is a widely accepted approach, beneficial in tumors with some dependency on steroids. In general, estrogen effects on cancer cell receptors can be modulated or abrogated by antiestrogens (such as Tamoxifen, Raloxifene, Toremifene and others) or steroid production throughout the body can be stopped by inhibition of the enzyme aromatase. Several new compounds, such as letrozole, anastrozole and vorozole have been recently developed and are being tested in phase III trials. They can be orally administered and are well tolerated.

Zolendronate: A Recently Introduced Biphosphonate in Cancer Therapy

  • Biphosphonates have been cautiously applied as calcium-sparing, cartilage protecting agents – a secondary, adjuvant effort in cancer treatment. Since hypercalcemia is a frequent and unpopular complication in the evolution of many malignant growths, efficient agents that would control this unwanted metabolic derailment are in demand. Pamidronate is one of the tools available and more recently, zolendronate (Zometa®) has been studied and evaluated.

Gene Therapy to Correct Chromosomal Fragile Site

  • Oral administration of recombinant viral DNA carrying a human tumor suppressor gene FHIT, is found to prevent significantly the development of chemically induced tumor in mouse lacking one allele of the gene.

Advances in Technology: Application of Imaging Mass Spectrometry in Mammalian Tissue

  • Animal model suggests that imaging by mass spectrometric technique can identify and locate specific proteins significantly increased or decreased in tumor. Thus proliferating edge of tumor can be identified which may help surgeons to determine better surgical margins.

Computer-Aided Detection in Screening Mammography

  • Retrospective analyses show that computer-aided technique can detect majority of calcification and masses missed by screening mammography. Therefore, prospective use of this technique will reduce the number of missed cancers.

A New Role for APC Tumor Suppressor Gene

  • Mutations in the gene, Adenomatous Polyposis Coli (APC), are responsible for familial colon cancer but also found in the early stages of sporadic colon cancer. Loss of several functions of APC can cause colon cancer. Recent studies demonstrate an additional function for APC, a crucial role during chromosome segregation.

Use of Oral Contraceptives and Ovarian Cancer Risk

  • The protective effect of oral contraceptive observed against ovarian cancer may be due to the progestin component of the drug.

Progestin may Induce Apoptosis in Ovarian Cells

  • In animal model, progestin is found to induce apoptosis of ovarian epithelial cells. This effect of progestin is thought to be mediated by increased expression of TGFb.

Long-Term Aspirin Use Reduces Risk of Ovarian Cancer

  • Regular aspirin use, at least fot six months, may reduce risk of ovarian cancer.

Glossary

  • A glossary of unfamiliar words and jargons in Cancer Watch, March 2001.

Editor| Contact Us | Subscription | Home| Adenine
Cancer Watch, Adenine Press, 2066 Central Avenue, Schenectady, NY USA 12304
phone: 518-456-0784; fax: 518-452-4955; email: stone@adeninepress.com
copyright © Adenine Press. Inc., All rights reserved.