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| Chemotherapy
& Cancer Treatment Modalities Online |
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| Anti-neoplasia
(& benign, disease-specific)
Attack Points & Modes |
I. Cancer Prevention:
- lifestyle & intake modifications to down-throttle adverse
stimuli:
- no cigarette smoking
- no tobacco snuff or dip
- no sunburns
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II. Cancer Neoadjuvant treatment:
This involves maneuvers and treatments begun prior
to the definitive treatment regimen.
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breast cancer:
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discontinue all estrogenic medications or
herbs
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chemotherapeutic assault on a larger (= to, > than
3 cm. and/or aggressive) tumor prior to surgery
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rectal cancer:
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III. Cancer Treating for cure:
- lifestyle & intake modifications to down-throttle adverse
stimuli:
- no cigarette smoking
- no tobacco snuff or dip
- no sunburns
- prophylactic/adjuvant therapy:
- breast radiation after lumpectomy thought to have completely
removed d-CIS
- antigrowth:
- suppress (or remove source of) stimulating hormones (breast & prostate
cancer):
- Tamoxifen
- cancel the oncogene: Herceptin (against HER-2);
we must IHC test the tumor for gene-product over-expression
and/or use the FISH technique (controlled against CE17)
to see if the HER-2 gene is amplified in a ratio greater
than 2.0
- Gleevec (anti-C-kit ?) against GIST and CML
- epidermal growth factor (EGF) receptor binders: block
the stimulation of the tyrosinase cell-proliferation cascade
- cell death cycle: neoplastic cells often refuse to die
- Genasense: one protein involved in regulating
cell death is Bcl-2 & when Bcl-2 is overexpressed,
cell death is hindered; and Genasense is an antisense molecule
designed to block Bcl-2 gene overexpression in such as
CLL, melanoma, multiple myeloma, and non-small-cell lung
cancer.
- immune mediated or immuno-WBC booster:
- goad WBCs or antibodies to attack malignant cells:
- Rituxan: Rituxan® (Rituximab), indicated
for the treatment of patients with relapsed or refractory
low-grade or follicular, CD20 positive, B-cell non-Hodgkin's
lymphoma: medicinal anti-CD20 attaches to malignant
(and benign) CD20 positive lymphoma cells or lymphoid
cells...we need to IHC test the tumor to make sure
that it has CD20 protein on it. Rituxan is the first
monoclonal antibody licensed for the treatment of
cancer in the United States
- Bexxar: (Tositumomab plus I131)
for CD20 positive non-Hodgkin lymphoma that relapsed
after Rituxan.
- Campath: Campath (alemtuzumab), indicated
for refractory CLL, works by binding to the CD52
antigen that is present on the surface of the malignant
(B-CLL) lymphocytes. After binding, the drug induces
antibody-dependent lysis. This causes the removal
of malignant lymphocytes from the blood, bone marrow,
and other affected organs.
- GVAX:
- Virulizin:
- vaccines:
- "injure" tumor cells so that more sensitive
to chemo &/or XRT:
- IMC-C225 (C225;
Erbitux): is an experimental biological treatment
that strikes molecular targets -- called EGF receptors
-- on cancerous tumors. This appears to weaken
the cancer cells' defenses against chemotherapy
and radiation therapy. Licensed and manufactured
by ImClone Systems, Inc., IMC-C225 is being studied
in clinical trials at M. D. Anderson and elsewhere.
According to ImClone, current trials involve patients
with cancers of the colon, pancreas, breast and
head and neck. Planned clinical trials will involve
patients with renal cell, esophageal, ovarian and
lung cancers.
- instillation of organisms: BCG intravessicular
instillation for urinary bladder cancer (TCC)
- radiation:
- zone/region
- superficial beam: BCC skin cancers
- intralumenal brachytherapy: rectal, tracheobronchial,
and esophageal
- intra-organal "seeds": prostate & breast
- external beam
- intracavitary
- target the malignant cells:
- Bexxar: radioactive I131isotope tagged
to monoclonal CD20 antibody specific for the
target cells; pretreatment loading dose of non-radioactive
CD20 to block/bind sites on benign CD20 positive
cells & leaves the open sites on CD20-richer
lymphoma cells for Bexxar binding (therefore, we
ought to give a quantitative adjective in our IHC
reports on lymphomas). I131isotope affects
about a 0.5 mm. radius
- anti-angiogenesis:
- Neovastat
- semaxanib
- surgery:
- heat/cold ablation:
- cytotoxic chemotherapy:
- topical: 5FU on superficial squamous lesions (PMKs).
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IV. Palliative Methods:
V. Benign Disease:
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Actimmune (interferon gamma-1b): blocks
multiplication of fibroblasts (scar-forming cells) by inhibiting
the production & action of the
scar-forming molecule, TGF-beta (used in osteopetrosis, idiopathic
pulmonary fibrosis).
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1999 - 2006, all rights reserved, Pathology Associates Of Lexington,
P.A. |
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