Transcript Slide 1

Correlation of
Serum Thymidine Kinase
in the
Prognosis/Treatment of
Cancer
By: Danielle Cervantes
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Thymidine Kinase
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Dot Blot Assay
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An analytical test that determines the specificity and selectivity of a
medical test.
Specificity
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Technique similar to Western Blotting that involves separating
proteins by spotting through a circular template directly onto the cell
membrane.
Receiver Operating Characteristic
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A transferase enzyme that catalyzes phosphorylation of drugs into a
form that will be active against viruses.
Odds that a test will be negative in the absence of a disease
Selectivity
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Odds that a test will be positive in the presence of a disease
Non-Hodgkin's Lymphoma
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Is a class of cancers that
affect the white blood
cells
Can be aggressive or
indolent
Estimated New Cases &
Deaths in US in 2010

Cases: 65,540
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Deaths: 21,210
cancer.osu.ed
STK1 as a Prognostic Factor
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Used in prognosis after chemotherapy treatment
Levels were determined by chemiluminescent
dot-blot assay
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Before chemo, and 1 & 28 days after
STK1 levels were analyzed two ways
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1) Western blot using an anti-TK1 IgY antibody
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2) Receiver Operating Characteristic (ROC)
analysis
STK1 as a Prognostic Factor Results
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Mean STK1 levels were much higher in patients
with non-Hodgkin's lymphoma than in healthy
people
Levels decreased until at day 28 the level
corresponded with that of a healthy person
The mean of the STK1 levels was significantly
correlated with the clinical response and 5-year
survival rate
Electrochemiluminescence (ECL)
Assay
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labautopedia.or
Designed to detect biological
threats
antigen complexes with 2
antibodies
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1) attached to a
magnetic particle
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2) modified with a
reporter molecule
Electrode attracts magnetic
particle and the detector emits
light.
Measured light is correlated with
presence of antigen
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Complete Response (Complete Remission)
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Partial Response (Partial Remission)
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Cancer that is not increasing or decreasing in extent/severity
Progressive Disease
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Decrease in size of tumor or extent of cancer after treatment
Stable Disease
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Disappearance of all signs of cancer after treatment
Cancer that's growing/spreading/getting worse
Metastasis
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Process of cancer spreading from first location to another.
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Cancer resulting from the spread of the primary tumor
STK1 in Cancer Treatment
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Experiment examined significance of STK1 in
clinical settings
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Monitored 1,247 patients
Concentration of STK1 was determined by ECL
assay
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Value was correlated to clinical stage & reaction
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Monitored outcome of surgery/multi-drug chemo
Looked at 5 different carcinomas
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Lung, esophagus, gastric, head & neck, &
Results
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STK1 values correlated with clinical stage in 4 of 5
carcinomas
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Levels declined in all tumor groups after treatment
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In CR or PR patients levels decreased or were <2pM
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In SD or PD patients levels increased or were >2pM
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Some showed metastasis
Overall STK1 correlates to clinical stages and reactions. It
also monitors effectiveness of therapies in
controlled/routine clinical trials
Overall Results
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STK1 is a good indicator as to the presence of
non-Hodgkin's lymphoma in patients
STK1 is a good indicator of the effectiveness of
treatment of different carcinomas
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It is not a good indicator of the effectiveness of
treatment in head & neck carcinomas
Significance of Results
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The results of these two studies show that levels of
STK1 can be used as a prognostic and monitoring
factor in cancer. This means that more
invasive/expensive procedures can be omitted in
treatment.
References
"Serum Thymidine Kinase 1 Correlates to Clinical Stages and Clinical
Reactions and Monitors the Outcome of Therapy of 1,247 Cancer Patients
in Routine Clinical Settings."
http://www.cancer.gov
http://www.antibodybeyond.com/applications/dotblot.htm
"Electrochemiluminescence (ECL) Assay."
<www.jpeocbd.osd.mil/packs/DocHandler.ashx?DocID=8597>.
http://www.cancer.gov/cancertopics/types/non-hodgkin
"Serum Thymidine Kinase 1 Concentration as a Prognostic Factor of
Chemotherapy-treated Non-Hodgkin's Lymphoma Patients."
http://www.medcalc.be/manual/roc.php