Increased homocysteine plasma levels in breast cancer patients of a Mexican population

Aim: Hyperhomocysteinemia has been associated with different pathologies, including cardiovascular diseases, hypertension, diabetes, and breast cancer (BC). To examine the differences in total homocysteine (tHcy) plasma levels, we compared healthy women to BC patients from a Mexican population. Materials and Methods: The tHcy plasma levels were measured using high-performance liquid chromatography with a fluorescence detector in 89 female controls and 261 BC patients. Results: The observed plasma tHcy levels were significantly higher among the BC patients (11.1019 ± 5.9161 µmol/l) compared to the controls (9.1046 ± 1.3213 µmol/l) (p = 0.002), and these differences were evident when stratified by age (≥ 50 years old), menopause status, overweight and obesity, miscarriages, node metastases, progression, subtype classification (luminal, Her2 and triple negative) and nonresponse to chemotherapy. Conclusions: The tHcy plasma levels could be a good marker for the progression and chemosensitivity of BC in the analyzed sample from a Mexican population. Key Words: plasma levels, homocysteine, HPLC, breast cancer, Mexican population

Communication Power

El objetivo del presente trabajo fue estudiar el efecto del extracto acuoso de Bursera fagaroides y Difluorometilornitina (DFMO), aplicados de forma individual y combinados, sobre los tejidos sanos en el modelo de linfoma murino L5178Y y específicamente sobre el metabolismo de las poliaminas (PAs), Putresina (Pu), Espermidina (Spd) y Espermina (Spm). Mediante cromatografía de intercambio iónico se determinaron los niveles de Pu en orina como indicadores de la evolución del tumor, mientras por radioinmunoensayo se cuantificó la actividad de la ODC renal. Los resultados obtenidos sugieren que no se combine la ingestión de algún tipo de té o brebaje preparado con dicha planta cuando se administre DFMO, dado su efecto estimulador del desarrollo tumoral, contrario al efecto anticáncer del extracto hidroalcohólico de la misma planta

SOD1 gene variants rs4817415, rs2070424, and rs1041740 and their association with breast cancer risk

OBJECTIVE: The aim of this investigation was to determine the frequency and association of the variants rs4817415, rs2070424, and rs1041740 of the SOD1 gene in healthy women and breast cancer (BC) patients. PATIENTS AND METHODS: Genomic DNA samples from 146 healthy women and 130 patients with BC were analyzed. RESULTS: GG genotype (OR 2.54, 95% CI 1.31-4.91, p = 0.0073) and the G allele (OR 1.37, 95% CI 1.09-1.73, p = 0.007) of the rs2070424 variant and CC genotype (OR 1.67, 95% CI 1.04-0.2.70, p = 0.0444) and allele C (OR 1.58, 95% CI 1.09-2.29, p = 0.0183) of the rs1041740 variant of SOD1 gene were associated as risk factors for BC susceptibility relative to the control group. Study groups comparison of the stratification by menopausal status showed an association of susceptibility to BC risk with carriers of the GG genotype (OR 2.9, 95% CI 1.11-7.81, p = 0.042) of the rs2070424 variant and with the premenopausal status of the study group and the TT (OR 2.89, 95% CI 1.73-4.85, p = 0.001) genotype of the rs1041740 variant. Furthermore, differences were observed in the patients with BC who were carriers of the CC genotype of the rs4817415 variant with elevated Ki-67 (≥ 20%) and who presented lymph node metastasis and stage III-IV BC (p<0.05). Two common haplotypes were identified in the study groups: CAC (protective factor), and CGC (risk factor) (p<0.05). CONCLUSIONS: The rs2070424 and rs1041740 variants of the SOD1 gene and the CGC haplotype were associated as risk susceptibility factors of BC in this sample analyzed

Communication Power

El objetivo del presente trabajo fue estudiar el efecto del extracto acuoso de Bursera fagaroides y Difluorometilornitina (DFMO), aplicados de forma individual y combinados, sobre los tejidos sanos en el modelo de linfoma murino L5178Y y específicamente sobre el metabolismo de las poliaminas (PAs), Putresina (Pu), Espermidina (Spd) y Espermina (Spm). Mediante cromatografía de intercambio iúnico se determinaron los niveles de Pu en orina como indicadores de la evolución del tumor, mientras por radioinmunoensayo se cuantificó la actividad de la ODC renal. Los resultados obtenidos sugieren que no se combine la ingestión de algún tipo de té o brebaje preparado con dicha planta cuando se administre DFMO, dado su efecto estimulador del desarrollo tumoral, contrario al efecto anticáncer del extracto hidroalcohólico de la misma planta

INCREASED HOMOCYSTEINE PLASMA LEVELS IN BREAST CANCER PATIENTS OF A MEXICAN POPULATION

Aim: Hyperhomocysteinemia has been associated with different pathologies, including cardiovascular diseases, hypertension, diabetes, and breast cancer (BC). To examine the differences in total homocysteine (tHcy) plasma levels, we compared healthy women to BC patients from a Mexican population. Materials and Methods: The tHcy plasma levels were measured using high-performance liquid chromatography with a fluorescence detector in 89 female controls and 261 BC patients. Results: The observed plasma tHcy levels were significantly higher among the BC patients (11.1019 ± 5.9161 µmol/l) compared to the controls (9.1046 ± 1.3213 µmol/l) (p = 0.002), and these differences were evident when stratified by age (≥ 50 years old), menopause status, overweight and obesity, miscarriages, node metastases, progression, subtype classification (luminal, Her2 and triple negative) and nonresponse to chemotherapy. Conclusions: The tHcy plasma levels could be a good marker for the progression and chemosensitivity of BC in the analyzed sample from a Mexican population. Key Words: plasma levels, homocysteine, HPLC, breast cancer, Mexican population