Thursday, May 31, 2007
Look Ma....i can breathe out white smoke!!!!
On a heavier note (pun intended, haha), got counselling test tmr LA!!!!sigh..
Tuesday, May 29, 2007
How la?
It's just so scary when your key lecture points for a topic in one of your courses is like this:
Pharmacogenetics
Students should appreciate the following
1. The principle of the relationship between genetics-environment-timing and human health/disease.
2. The broad concept of pharmacogenetics/pharmacogenomics (PGe) - the individualisation of drug therapy according to inter-patient genetic variability. The two terms are generally used interchangably.
3. The scenarios in which pharamcogenetics has the greatest value - eg. drug of low therpaeutic index, chronic treatment etc.
4. Types of genetic variation that may be investigated - single nucleotide polymorphisms (and small insertions/deletions). Patient can have 3 possible genotypes homozygous wildtype(w/w), homozygous mutant(m/m)or heterozygous (w/m). Potential impact of SNPs
coding versus non coding, synonymous (no change to amino acid sequence – also referred to as silent mutations) versus non synonymous (changes amino acid sequence – also referred to as missense mutations). Haplotypes - chromosomal phasing of SNPs
5. Utility of PGe to the pharmaceutical industry
- the need for the investigation of new drug targets for genetic variablity
- the ability of PGe to improve clinical trial process
6. Genetic variability in CYP450 - including specific drug examples such as warfarin and proton pump inhibitors. You DO NOT need to know all of the alleles for every SNP but instead those that were discussed in more detail in the lecture.
7. Genetic variability in UGT1A1 (GT1A1*28 TA promoter polymorphism) - including irinotecan example
8. Genetic variability in TPMT – you DO NOT need to know the specific amino acid changes but understand the consequences
9. Techniques to determine drug metabolising status - genotyping or phenotyping and the relative advantages/disadvantages of each. Have a superficial appreciation of the three steps in genotyping (PCR amplification to copy the desired region of DNA > allele discrimination reaction to determine which sequence is present > product detection). Phenotyping - administration of a probe compound. Determine ratio of parent drug:metabolite ratio. High ratio indicates poor metabolsim. eg. dextromethorphan (DM) CYP2D6 phenotyping. DM:DX greater than 0.30 indicates poor metaboliser (PM) status, DM:DX less than 0.3 indicates extensive metaboliser (EM)
10. The effect of Beta2 adrenergic receptor haplotype/ SNPs upon response to salbutamol
11. Whole genome scanning for candidate gene identification -used when traditional approach does not work. Exemplified by abacavir HLA-B57 example
12.Polygenic drug response - considering the impact of variation in more than one gene.
Exemplified by warfarin dose determination by CYP2C9 and VKORC1 (encodes for vitamin k reductase)
13. The application of gene expression profiling to pharmacogenetics - use of microarray transcription profiling to select patients requiring adjuvant chemotherapy to reduce unnecessary exposure to highly toxic drugs
14. The registration and potential problems with BiDil - the rationale for the company producing a drug for a single race (easy FDA approval, patentable) Problems with the study that lead to the registration (only in African Americans, people self identified race). Problems with the use of race as a marker for individualistion of drug therapy
15. Limitations of pharmacogenetics - in particular orphan patients (patient with a genetic profile that indicates poor response to available medicines). Problems with predicting rare events etc.
Die.
Thursday, May 24, 2007
How I celebrated my coming of age (sure or not wan????hahaha)
I really liked the cake :)
Went back home after that and lo and behold, Li Xin surprised me with a special 'toast'.haha.
And for dinner, i had like the best food anyone could have asked for. Had like huge pizzas and a dish called 'abortion'. I know it was superfilled with cholesterol and those kinda stuffs but i tell you..power gila sial!!!!!!
But i had to use a butcher's knife to cut it. Haha. Actually, it was very soft. Just that us being students, we got no proper cut-caking knife.
My birthday presents. THANK YOU!!!!
THANK YOU SO VERY MUCH TO ALL WHO MADE THIS DAY EXTRA SPECIAL FOR ME!!(especially those sms' and msn chats)
I just want to end this post by sharing with you 2 verses that Jez and Melanie shared with me. Psalm 139:14 I will praise You, for I am fearfully and wonderfully made; Marvelous are Your works, And that my soul knows very well
Mark 9:23 Jesus said to him, "If you can believe, all things are possible to him who believes." (emphasis mine)
"My wish, for you, is that this life becomes all that you want it to,your dreams stay big, your worries stay small,You never need to carry more than you can hold,and while you're out there getting where you're getting to,I hope you know somebody loves you, and wants the same things too,Yeah, this, is my wish." Thank YOU.
Last but not least, thank you to the Joker who was playing with WORMS on my birthday. HAHA!!not to forget my family back home,specifically to the individul which i had to force him to wish me. *grins*