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Colorectal Cancer and Genetic Polymorphism in Key Regulatory Low Penetrance Genes

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Genetic Polymorphism and cancer susceptibility

Abstract

Colorectal cancer (CRC) is one of the major solid tissue malignancies affecting the worldwide population. CRC is the third most common cancer and fourth among the major contributors of cancer-related mortality worldwide. CRC incidence rate exhibits a considerable variation with geographical location and with race and ethnicity. The variation in CRC incidence with geographical location is so conspicuous that CRC is regarded as the marker of the socioeconomic development of nations. The role played by the genetic variants especially SNPs in modulating the risk of CRC is of very diverse nature. In this chapter, we would be discussing the effects of SNPs in the low penetrance genes depending upon the type of pathways these genes are involved in. Numerous pathways, which are known to get affected by genetic variations, can be categorized as: cell cycle regulatory, transcription regulatory, DNA repair, folate metabolism, fat metabolism, xenobiotic and inflammatory pathways.

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Abbreviations

5,10-MTHFR:

5,10-Methylenetetrahydrofolate reductase

5-MTHF:

5-methyltetrahydrofolate

ACE:

Angiotensin-converting enzyme

ADT:

Androgen deprivation therapy

AJCC:

American Joint Committee on Cancer

APC:

Adenomatous polyposis coli

APS:

Adenomatous polyposis syndromes

ASR:

Age standardized rate

ASRi:

ASR incidence rates

ASRm:

ASR mortality rate

AURKA:

Aurora A kinase

B12:

Vitamin B12

B2:

Vitamin B2

B6:

Vitamin B6

BER:

Base excision repair

C1-THF:

C-1-tetrahydrofolate

CBS:

Cystathionine β-synthase

CCND1:

Cyclin D1

CD:

Crohn’s disease

CIMP:

CpG island methylator phenotype

CIN:

Chromosomal instability

CNVs:

Copy number variations

CRC:

Colorectal cancer

CS:

Colonoscopy

CT:

Computed tomographic

CTH:

Cystathionine γ-lyase

DCBE:

Double contrast barium enema

DCC:

Deleted in Colorectal Cancer

DHF:

Dihydrofolate

DHFR:

Dihydrofolate reductase

DHT:

dDihydrotestosterone

DSBR:

Double-strand break repair

dTMP:

Deoxythymidine monophosphate

dUMP:

Deoxyuridine monophosphate

FAP:

Familial adenomatous polyposis

FOBT:

Fecal occult blood testing

Formyl THF:

Formyl tetrahydrofolate

FS:

Flexible sigmoidoscopy

GIT:

Gastrointestinal tract

GnRH:

Gonadotropin-releasing hormone

GWAS:

Genome-wide association study

HDI:

Human development index

HIC-1:

hypermethylated-in-cancer 1

HNPCC:

Hereditary non-polyposis colorectal cancer

HOGG1:

Human 8-oxoguanine DNA glycosylase 1

HPCC:

Hereditary polyposis colorectal cancer

HPS:

Hamartomatous polyposis syndromes

HR:

Homologous recombination

IBD:

Inflammatory bowel disease

IGF-2:

Insulin-like growth factor 2

Indels:

Insertions or deletions

MGMT:

Methylguanine methyltransferase

MMR:

Mismatch repair

MSI:

Microsatellite instability

MTHFR:

Methylenetetrahydrofolate reductase

MTR:

Methionine synthase

MTRR:

Methionine synthase reductase

NER:

Nucleotide excision repair

NGS:

Next-generation sequencing

NSAIDs:

Non-steroidal anti-inflammatory drugs

Plk:

Polo-like kinases

PPARG:

Peroxisome proliferator-activated receptor gamma

RXR:

Retinoid X receptor

SAM:

S-adenosyl methionine

SHMT1:

Serine hydroxymethyl transferase 1

SNP:

Single nucleotide polymorphism

SNPs:

Single nucleotide polymorphisms

SSRs:

simple sequence repeats

THF:

Tetrahydrofolate

TP53:

Tumor protein p53

TS:

Thymidylate synthase

UC:

Ulcerative colitis

VC:

Virtual colonoscopy

VDR:

Vitamin D receptor

XPD:

Xeroderma pigmentosum complementary D

XRCC:

X-ray repair cross complementing

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Correspondence to Aga Syed Sameer .

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Banday, M.Z., Sameer, A.S., Nissar, S. (2021). Colorectal Cancer and Genetic Polymorphism in Key Regulatory Low Penetrance Genes. In: Sameer, A.S., Banday, M.Z., Nissar, S. (eds) Genetic Polymorphism and cancer susceptibility. Springer, Singapore. https://doi.org/10.1007/978-981-33-6699-2_5

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