Transcript Slide 1
Correlation of
Serum Thymidine Kinase
in the
Prognosis/Treatment of
Cancer
By: Danielle Cervantes
Thymidine Kinase
Dot Blot Assay
An analytical test that determines the specificity and selectivity of a
medical test.
Specificity
Technique similar to Western Blotting that involves separating
proteins by spotting through a circular template directly onto the cell
membrane.
Receiver Operating Characteristic
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
Odds that a test will be positive in the presence of a disease
Non-Hodgkin's Lymphoma
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
Deaths: 21,210
cancer.osu.ed
STK1 as a Prognostic Factor
Used in prognosis after chemotherapy treatment
Levels were determined by chemiluminescent
dot-blot assay
Before chemo, and 1 & 28 days after
STK1 levels were analyzed two ways
1) Western blot using an anti-TK1 IgY antibody
2) Receiver Operating Characteristic (ROC)
analysis
STK1 as a Prognostic Factor Results
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
labautopedia.or
Designed to detect biological
threats
antigen complexes with 2
antibodies
1) attached to a
magnetic particle
2) modified with a
reporter molecule
Electrode attracts magnetic
particle and the detector emits
light.
Measured light is correlated with
presence of antigen
Complete Response (Complete Remission)
Partial Response (Partial Remission)
Cancer that is not increasing or decreasing in extent/severity
Progressive Disease
Decrease in size of tumor or extent of cancer after treatment
Stable Disease
Disappearance of all signs of cancer after treatment
Cancer that's growing/spreading/getting worse
Metastasis
Process of cancer spreading from first location to another.
Cancer resulting from the spread of the primary tumor
STK1 in Cancer Treatment
Experiment examined significance of STK1 in
clinical settings
Monitored 1,247 patients
Concentration of STK1 was determined by ECL
assay
Value was correlated to clinical stage & reaction
Monitored outcome of surgery/multi-drug chemo
Looked at 5 different carcinomas
Lung, esophagus, gastric, head & neck, &
Results
STK1 values correlated with clinical stage in 4 of 5
carcinomas
Levels declined in all tumor groups after treatment
In CR or PR patients levels decreased or were <2pM
In SD or PD patients levels increased or were >2pM
Some showed metastasis
Overall STK1 correlates to clinical stages and reactions. It
also monitors effectiveness of therapies in
controlled/routine clinical trials
Overall Results
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
It is not a good indicator of the effectiveness of
treatment in head & neck carcinomas
Significance of Results
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