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1دورية أكاديمية
المؤلفون: Drummond, AE, Swain, CT, Brown, KA, Dixon-Suen, SC, Boing, L, van Roekel, EH, Moore, MM, Gaunt, TR, Milne, RL, English, DR, Martin, RM, Lewis, SJ, Lynch, BM
الوصف: We undertook a systematic review and appraised the evidence for an effect of circulating sex steroid hormones and sex hormone-binding globulin (SHBG) on breast cancer risk in pre- and postmenopausal women. Systematic searches identified prospective studies relevant to this review. Meta-analyses estimated breast cancer risk for women with the highest compared with the lowest level of sex hormones, and the DRMETA Stata package was used to graphically represent the shape of these associations. The ROBINS-E tool assessed risk of bias, and the GRADE system appraised the strength of evidence. In premenopausal women, there was little evidence that estrogens, progesterone, or SHBG were associated with breast cancer risk, whereas androgens showed a positive association. In postmenopausal women, higher estrogens and androgens were associated with an increase in breast cancer risk, whereas higher SHBG was inversely associated with risk. The strength of the evidence quality ranged from low to high for each hormone. Dose-response relationships between sex steroid hormone concentrations and breast cancer risk were most notable for postmenopausal women. These data support the plausibility of a role for sex steroid hormones in mediating the causal relationship between physical activity and the risk of breast cancer.See related reviews by Lynch et al., p. 11 and Swain et al., p. 16.
العلاقة: pii: 1055-9965.EPI-21-0438; Drummond, A. E., Swain, C. T., Brown, K. A., Dixon-Suen, S. C., Boing, L., van Roekel, E. H., Moore, M. M., Gaunt, T. R., Milne, R. L., English, D. R., Martin, R. M., Lewis, S. J. & Lynch, B. M. (2022). Linking Physical Activity to Breast Cancer via Sex Steroid Hormones, Part 2: The Effect of Sex Steroid Hormones on Breast Cancer Risk. CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION, 31 (1), pp.28-37. https://doi.org/10.1158/1055-9965.EPI-21-0438Test.; http://hdl.handle.net/11343/301683Test
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2دورية أكاديمية
المؤلفون: Swain, CTV, Drummond, AE, Boing, L, Milne, RL, English, DR, Brown, KA, van Roekel, EH, Dixon-Suen, SC, Lynch, MJ, Moore, MM, Gaunt, TR, Martin, RM, Lewis, SJ, Lynch, BM
الوصف: The effect of physical activity on breast cancer risk may be partly mediated by sex steroid hormones. This review synthesized and appraised the evidence for an effect of physical activity on sex steroid hormones. Systematic searches were performed using MEDLINE (Ovid), EMBASE (Ovid), and SPORTDiscus to identify experimental studies and prospective cohort studies that examined physical activity and estrogens, progestins, and/or androgens, as well as sex hormone binding globulin (SHBG) and glucocorticoids in pre- and postmenopausal women. Meta-analyses were performed to generate effect estimates. Risk of bias was assessed, and the GRADE system was used to appraise quality of the evidence. Twenty-eight randomized controlled trials (RCT), 81 nonrandomized interventions, and six observational studies were included. Estrogens, progesterone, and androgens mostly decreased, and SHBG increased, in response to physical activity. Effect sizes were small, and evidence quality was graded moderate or high for each outcome. Reductions in select sex steroid hormones following exercise supports the biological plausibility of the first part of the physical activity-sex hormone-breast cancer pathway. The confirmed effect of physical activity on decreasing circulating sex steroid hormones supports its causal role in preventing breast cancer.See related reviews by Lynch et al., p. 11 and Drummond et al., p. 28.
العلاقة: pii: 1055-9965.EPI-21-0437; Swain, C. T. V., Drummond, A. E., Boing, L., Milne, R. L., English, D. R., Brown, K. A., van Roekel, E. H., Dixon-Suen, S. C., Lynch, M. J., Moore, M. M., Gaunt, T. R., Martin, R. M., Lewis, S. J. & Lynch, B. M. (2022). Linking Physical Activity to Breast Cancer via Sex Hormones, Part 1: The Effect of Physical Activity on Sex Steroid Hormones. CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION, 31 (1), pp.16-27. https://doi.org/10.1158/1055-9965.EPI-21-0437Test.; http://hdl.handle.net/11343/305132Test
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3دورية أكاديمية
المؤلفون: Wang, SE, Hodge, A, Dashti, SG, Dixon-Suen, SC, Castano-Rodriguez, N, Thomas, R, Giles, G, Boussioutas, A, Kendall, B, English, DR
الوصف: Barrett's oesophagus (BE) is the precursor of oesophageal adenocarcinoma, which has become the most common type of oesophageal cancer in many Western populations. Existing evidence on diet and risk of BE predominantly comes from case-control studies, which are subject to recall bias in measurement of diet. We aimed to investigate the potential effect of diet, including macronutrients, carotenoids, food groups, specific food items, beverages and dietary scores, on risk of BE in over 20 000 participants of the Melbourne Collaborative Cohort Study. Diet at baseline (1990-1994) was measured using a food frequency questionnaire. The outcome was BE diagnosed between baseline and follow-up (2007-2010). Logistic regression models were used to estimate OR and 95 % CI for diet in relation to risk of BE. Intakes of leafy vegetables and fruit were inversely associated with risk of BE (highest v. lowest quartile: OR = 0·59; CI: 0·38, 0·94; P-trend = 0·02 and OR = 0·58; CI: 0·37, 0·93; P-trend = 0·02 respectively), as were dietary fibre and carotenoids. Stronger associations were observed for food than the nutrients found in them. Positive associations were observed for discretionary food (OR = 1·54; CI: 0·97, 2·44; P-trend = 0·04) and total fat intake (OR per 10 g/d = 1·11; CI: 1·00, 1·23), the association for fat was less robust in sensitivity analyses. No association was observed for meat, protein, dairy products or diet scores. Diet is a potential modifiable risk factor for BE. Public health and clinical guidelines that incorporate dietary recommendations could contribute to reduction in risk of BE and, thereby, oesophageal adenocarcinoma.
العلاقة: NHMRC/209057; pii: S0007114522002112; Wang, S. E., Hodge, A., Dashti, S. G., Dixon-Suen, S. C., Castano-Rodriguez, N., Thomas, R., Giles, G., Boussioutas, A., Kendall, B. & English, D. R. (2022). Diet and risk of Barrett's oesophagus: Melbourne collaborative cohort study. BRITISH JOURNAL OF NUTRITION, 129 (7), https://doi.org/10.1017/S0007114522002112Test.; http://hdl.handle.net/11343/313747Test
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4دورية أكاديمية
المؤلفون: Ong, JS, Dixon-Suen, SC, Han, X, An, J, Fitzgerald, R, Buas, M, Gammon, MD, Corley, DA, Shaheen, NJ, Hardie, LJ, Bird, NC, Reid, BJ, Chow, WH, Risch, HA, Ye, W, Liu, G, Romero, Y, Bernstein, L, Wu, AH, Whiteman, DE, Vaughan, T, Agee, M, Alipanahi, B, Auton, A, Bell, RK, Bryc, K, Elson, SL, Fontanillas, P, Furlotte, NA, Hinds, DA, Huber, KE, Kleinman, A, Litterman, NK, McIntyre, MH, Mountain, JL, Noblin, ES, Northover, CAM, Pitts, SJ, Sathirapongsasuti, JF, Sazonova, OV, Shelton, JF, Shringarpure, S, Tian, C, Tung, JY, Vacic, V, Wilson, CH, Liyanage, U, Dusingize, JC, Schumacher, J, Gockel, I, Böhmer, A, Jankowski, J, Palles, C, O’Mara, T, Spurdle, A, Law, MH, Iles, MM, Pharoah, P, Berchuck, A, Zheng, W, Thrift, AP, Olsen, C, Neale, RE, Gharahkhani, P, Webb, PM, MacGregor, S
المصدر: Nature Communications , 12 , Article 246. (2021)
مصطلحات موضوعية: Cancer epidemiology, Cancer genetics, Cancer prevention
الوصف: Previous Mendelian randomization (MR) studies on 25-hydroxyvitamin D (25(OH)D) and cancer have typically adopted a handful of variants and found no relationship between 25(OH)D and cancer; however, issues of horizontal pleiotropy cannot be reliably addressed. Using a larger set of variants associated with 25(OH)D (74 SNPs, up from 6 previously), we perform a unified MR analysis to re-evaluate the relationship between 25(OH)D and ten cancers. Our findings are broadly consistent with previous MR studies indicating no relationship, apart from ovarian cancers (OR 0.89; 95% C.I: 0.82 to 0.96 per 1 SD change in 25(OH)D concentration) and basal cell carcinoma (OR 1.16; 95% C.I.: 1.04 to 1.28). However, after adjustment for pigmentation related variables in a multivariable MR framework, the BCC findings were attenuated. Here we report that lower 25(OH)D is unlikely to be a causal risk factor for most cancers, with our study providing more precise confidence intervals than previously possible.
وصف الملف: application/pdf
العلاقة: https://discovery.ucl.ac.uk/id/eprint/10170841/1/A%20comprehensive%20re-assessment%20of%20the%20association%20between%20vitamin%20D%20and%20cancer%20susceptibility%20using%20Mendelian%20randomization.pdfTest; https://discovery.ucl.ac.uk/id/eprint/10170841Test/
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5دورية أكاديمية
المؤلفون: Ong, J-S, Dixon-Suen, SC, Han, X, An, J, Liyanage, U, Dusingize, J-C, Schumacher, J, Gockel, I, Böhmer, A, Jankowski, J, Palles, C, O’Mara, T, Spurdle, A, Law, MH, Iles, MM, Pharoah, P, Berchuck, A, Zheng, W, Thrift, AP, Olsen, C, Neale, RE, Gharahkhani, P, Webb, PM, MacGregor, S
الوصف: Previous Mendelian randomization (MR) studies on 25-hydroxyvitamin D (25(OH)D) and cancer have typically adopted a handful of variants and found no relationship between 25(OH)D and cancer; however, issues of horizontal pleiotropy cannot be reliably addressed. Using a larger set of variants associated with 25(OH)D (74 SNPs, up from 6 previously), we perform a unified MR analysis to re-evaluate the relationship between 25(OH)D and ten cancers. Our findings are broadly consistent with previous MR studies indicating no relationship, apart from ovarian cancers (OR 0.89; 95% C.I: 0.82 to 0.96 per 1 SD change in 25(OH)D concentration) and basal cell carcinoma (OR 1.16; 95% C.I.: 1.04 to 1.28). However, after adjustment for pigmentation related variables in a multivariable MR framework, the BCC findings were attenuated. Here we report that lower 25(OH)D is unlikely to be a causal risk factor for most cancers, with our study providing more precise confidence intervals than previously possible.
وصف الملف: text
العلاقة: https://eprints.whiterose.ac.uk/170223/1/s41467-020-20368-w.pdfTest; Ong, J-S, Dixon-Suen, SC, Han, X et al. (21 more authors) (2021) A comprehensive re-assessment of the association between vitamin D and cancer susceptibility using Mendelian randomization. Nature Communications, 12 (1). 246. ISSN 2041-1723
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6دورية أكاديمية
المؤلفون: Dixon-Suen, SC, Nagle, CM, Thrift, AP, Pharoah, PDP, Ewing, A, Pearce, CL, Zheng, W, Australian Ovarian Cancer Study Group, Chenevix-Trench, G, Fasching, PA, Beckmann, MW, Lambrechts, D, Vergote, I, Lambrechts, S, Van Nieuwenhuysen, E, Rossing, MA, Doherty, JA, Wicklund, KG, Chang-Claude, J, Jung, AY, Moysich, KB, Odunsi, K, Goodman, MT, Wilkens, LR, Thompson, PJ, Shvetsov, YB, Dörk, T, Park-Simon, T-W, Hillemanns, P, Bogdanova, N, Butzow, R, Nevanlinna, H, Pelttari, LM, Leminen, A, Modugno, F, Ness, RB, Edwards, RP, Kelley, JL, Heitz, F, du Bois, A, Harter, P, Schwaab, I, Karlan, BY, Lester, J, Orsulic, S, Rimel, BJ, Kjær, SK, Høgdall, E, Jensen, A, Goode, EL, Fridley, BL, Cunningham, JM, Winham, SJ, Giles, GG, Bruinsma, F, Milne, RL, Southey, MC, Hildebrandt, MAT, Wu, X, Lu, KH, Liang, D, Levine, DA, Bisogna, M, Schildkraut, JM, Berchuck, A, Cramer, DW, Terry, KL, Bandera, EV, Olson, SH, Salvesen, HB, Thomsen, LCV, Kopperud, RK, Bjorge, L, Kiemeney, LA, Massuger, LFAG, Pejovic, T, Bruegl, A, Cook, LS, Le, ND, Swenerton, KD, Brooks-Wilson, A, Kelemen, LE, Lubiński, J, Huzarski, T, Gronwald, J, Menkiszak, J, Wentzensen, N, Brinton, L, Yang, H, Lissowska, J, Høgdall, CK, Lundvall, L, Song, H, Tyrer, JP, Campbell, I, Eccles, D, Paul, J, Glasspool, R, Siddiqui, N, Whittemore, AS, Sieh, W, McGuire, V, Rothstein, JH, Narod, SA, Phelan, C, Risch, HA, McLaughlin, JR, Anton-Culver, H, Ziogas, A, Menon, U, Gayther, SA, Ramus, SJ, Gentry-Maharaj, A, Wu, AH, Pike, MC, Tseng, C-C, Kupryjanczyk, J, Dansonka-Mieszkowska, A, Budzilowska, A, Rzepecka, IK, Webb, PM, Ovarian Cancer Association Consortium
المصدر: Br J Cancer , 118 (8) pp. 1123-1129. (2018)
مصطلحات موضوعية: Cancer epidemiology, Genetics research, Ovarian cancer, Risk factors
الوصف: BACKGROUND: Observational studies suggest greater height is associated with increased ovarian cancer risk, but cannot exclude bias and/or confounding as explanations for this. Mendelian randomisation (MR) can provide evidence which may be less prone to bias. METHODS: We pooled data from 39 Ovarian Cancer Association Consortium studies (16,395 cases; 23,003 controls). We applied two-stage predictor-substitution MR, using a weighted genetic risk score combining 609 single-nucleotide polymorphisms. Study-specific odds ratios (OR) and 95% confidence intervals (CI) for the association between genetically predicted height and risk were pooled using random-effects meta-analysis. RESULTS: Greater genetically predicted height was associated with increased ovarian cancer risk overall (pooled-OR (pOR) = 1.06; 95% CI: 1.01-1.11 per 5 cm increase in height), and separately for invasive (pOR = 1.06; 95% CI: 1.01-1.11) and borderline (pOR = 1.15; 95% CI: 1.02-1.29) tumours. CONCLUSIONS: Women with a genetic propensity to being taller have increased risk of ovarian cancer. This suggests genes influencing height are involved in pathways promoting ovarian carcinogenesis.
وصف الملف: text
العلاقة: https://discovery.ucl.ac.uk/id/eprint/10047755/1/OCAC_Height_MR%20BJC%20article%20FINAL%20ACCEPTED%20with%20tables-figure%20final.pdfTest; https://discovery.ucl.ac.uk/id/eprint/10047755Test/
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7دورية أكاديمية
المؤلفون: Dixon-Suen, SC, Nagle, CM, Thrift, AP, Pharoah, PDP, Ewing, A, Pearce, CL, Zheng, W, Chenevix-Trench, G, Fasching, PA, Beckmann, MW, Lambrechts, D, Vergote, I, Lambrechts, S, Van Nieuwenhuysen, E, Rossing, MA, Doherty, JA, Wicklund, KG, Chang-Claude, J, Jung, AY, Moysich, KB, Odunsi, K, Goodman, MT, Wilkens, LR, Thompson, PJ, Shvetsov, YB, Doerk, T, Park-Simon, T-W, Hillemanns, P, Bogdanova, N, Butzow, R, Nevanlinna, H, Pelttari, LM, Leminen, A, Modugno, F, Ness, RB, Edwards, RP, Kelley, JL, Heitz, F, du Bois, A, Harter, P, Schwaab, I, Karlan, BY, Lester, J, Orsulic, S, Rimel, BJ, Kjaer, SK, Hogdall, E, Jensen, A, Goode, EL, Fridley, BL, Cunningham, JM, Winham, SJ, Giles, GG, Bruinsma, F, Milne, RL, Southey, MC, Hildebrandt, MAT, Wu, X, Lu, KH, Liang, D, Levine, DA, Bisogna, M, Schildkraut, JM, Berchuck, A, Cramer, DW, Terry, KL, Bandera, EV, Olson, SH, Salvesen, HB, Thomsen, LCV, Kopperud, RK, Bjorge, L, Kiemeney, LA, Massuger, LFAG, Pejovic, T, Bruegl, A, Cook, LS, Le, ND, Swenerton, KD, Brooks-Wilson, A, Kelemen, LE, Lubinski, J, Huzarski, T, Gronwald, J, Menkiszak, J, Wentzensen, N, Brinton, L, Yang, H, Lissowska, J, Hogdall, CK, Lundvall, L, Song, H, Tyrer, JP, Campbell, I, Eccles, D, Paul, J, Glasspool, R, Siddiqui, N, Whittemore, AS, Sieh, W, McGuire, V, Rothstein, JH, Narod, SA, Phelan, C, Risch, HA, McLaughlin, JR, Anton-Culver, H, Ziogas, A, Menon, U, Gayther, SA, Ramus, SJ, Gentry-Maharaj, A, Wu, AH, Pike, MC, Tseng, C-C, Kupryjanczyk, J, Dansonka-Mieszkowska, A, Budzilowska, A, Rzepecka, IK, Webb, PM
الوصف: BACKGROUND: Observational studies suggest greater height is associated with increased ovarian cancer risk, but cannot exclude bias and/or confounding as explanations for this. Mendelian randomisation (MR) can provide evidence which may be less prone to bias. METHODS: We pooled data from 39 Ovarian Cancer Association Consortium studies (16,395 cases; 23,003 controls). We applied two-stage predictor-substitution MR, using a weighted genetic risk score combining 609 single-nucleotide polymorphisms. Study-specific odds ratios (OR) and 95% confidence intervals (CI) for the association between genetically predicted height and risk were pooled using random-effects meta-analysis. RESULTS: Greater genetically predicted height was associated with increased ovarian cancer risk overall (pooled-OR (pOR) = 1.06; 95% CI: 1.01-1.11 per 5 cm increase in height), and separately for invasive (pOR = 1.06; 95% CI: 1.01-1.11) and borderline (pOR = 1.15; 95% CI: 1.02-1.29) tumours. CONCLUSIONS: Women with a genetic propensity to being taller have increased risk of ovarian cancer. This suggests genes influencing height are involved in pathways promoting ovarian carcinogenesis.
العلاقة: NHMRC/209057; NHMRC/400281; pii: 10.1038/s41416-018-0011-3; Dixon-Suen, S. C., Nagle, C. M., Thrift, A. P., Pharoah, P. D. P., Ewing, A., Pearce, C. L., Zheng, W., Chenevix-Trench, G., Fasching, P. A., Beckmann, M. W., Lambrechts, D., Vergote, I., Lambrechts, S., Van Nieuwenhuysen, E., Rossing, M. A., Doherty, J. A., Wicklund, K. G., Chang-Claude, J., Jung, A. Y. ,. Webb, P. M. (2018). Adult height is associated with increased risk of ovarian cancer: a Mendelian randomisation study. BRITISH JOURNAL OF CANCER, 118 (8), pp.1123-1129. https://doi.org/10.1038/s41416-018-0011-3Test.; http://hdl.handle.net/11343/256255Test
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8دورية أكاديمية
المؤلفون: Wang, SE, Dashti, SG, Hodge, AM, Dixon-Suen, SC, Castano-Rodriguez, N, Thomas, RJS, Giles, GG, Milne, RL, Boussioutas, A, Kendall, BJ, English, DR
الوصف: BACKGROUND: Mechanisms for how Helicobacter pylori infection affects risk of gastroesophageal reflux disease (GERD) and Barrett's esophagus are incompletely understood and might differ by sex. METHODS: In a case-control study nested in the Melbourne Collaborative Cohort Study with 425 GERD cases and 169 Barrett's esophagus cases (identified at 2007-2010 follow-up), we estimated sex-specific odds ratios for participants who were H. pylori seronegative versus seropositive at baseline (1990-1994). To explore possible mechanisms, we (i) compared patterns of H. pylori-induced gastritis by sex using serum pepsinogen-I and gastrin-17 data and (ii) quantified the effect of H. pylori seronegativity on Barrett's esophagus mediated by GERD using causal mediation analysis. RESULTS: For men, H. pylori seronegativity was associated with 1.69-fold [95% confidence interval (CI), 1.03-2.75] and 2.28-fold (95% CI, 1.27-4.12) higher odds of GERD and Barrett's esophagus, respectively. No association was observed for women. H. pylori-induced atrophic antral gastritis was more common in men (68%) than in women (56%; P = 0.015). For men, 5 of the 15 per 1,000 excess Barrett's esophagus risk from being seronegative were mediated by GERD. CONCLUSIONS: Men, but not women, who were H. pylori seronegative had increased risks of GERD and Barrett's esophagus. A possible explanation might be sex differences in patterns of H. pylori-induced atrophic antral gastritis, which could lead to less erosive reflux for men. Evidence of GERD mediating the effect of H. pylori on Barrett's esophagus risk among men supports this proposed mechanism. IMPACT: The findings highlight the importance of investigating sex differences in the effect of H. pylori on risk of GERD and Barrett's esophagus in future studies.
العلاقة: NHMRC/209057; pii: 699331; Wang, S. E., Dashti, S. G., Hodge, A. M., Dixon-Suen, S. C., Castano-Rodriguez, N., Thomas, R. J. S., Giles, G. G., Milne, R. L., Boussioutas, A., Kendall, B. J. & English, D. R. (2022). Mechanisms for the Sex-Specific Effect of H. Pylori on Risk of Gastroesophageal Reflux Disease and Barrett's Esophagus. CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION, 31 (8), pp.1630-1637. https://doi.org/10.1158/1055-9965.EPI-22-0234Test.; http://hdl.handle.net/11343/313748Test
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9دورية أكاديمية
المؤلفون: Dixon-Suen, SC, Lewis, SJ, Martin, RM, English, DR, Boyle, T, Giles, GG, Michailidou, K, Bolla, MK, Wang, Q, Dennis, J, Lush, M, Ahearn, TU, Ambrosone, CB, Andrulis, IL, Anton-Culver, H, Arndt, V, Aronson, KJ, Augustinsson, A, Auvinen, P, Beane Freeman, LE, Becher, H, Beckmann, MW, Behrens, S, Bermisheva, M, Blomqvist, C, Bogdanova, N, Bojesen, SE, Bonanni, B, Brenner, H, Bruening, T, Buys, SS, Camp, NJ, Campa, D, Canzian, F, Castelao, JE, Cessna, MH, Chang-Claude, J, Chanock, SJ, Clarke, CL, Conroy, DM, Couch, FJ, Cox, A, Cross, SS, Czene, K, Daly, MB, Devilee, P, Doerk, T, Dwek, M, Eccles, DM, Eliassen, AH, Engel, C, Eriksson, M, Evans, DG, Fasching, PA, Fletcher, O, Flyger, H, Fritschi, L, Gabrielson, M, Gago-Dominguez, M, Garcia-Closas, M, Garcia-Saenz, JA, Goldberg, MS, Guenel, P, Guendert, M, Hahnen, E, Haiman, CA, Haeberle, L, Hakansson, N, Hall, P, Hamann, U, Hart, SN, Harvie, M, Hillemanns, P, Hollestelle, A, Hooning, MJ, Hoppe, R, Hopper, J, Howell, A, Hunter, DJ, Jakubowska, A, Janni, W, John, EM, Jung, A, Kaaks, R, Keeman, R, Kitahara, CM, Koutros, S, Kraft, P, Kristensen, VN, Kubelka-Sabit, K, Kurian, AW, Lacey, J, Lambrechts, D, Le Marchand, L, Lindblom, A, Loibl, S, Lubinski, J, Mannermaa, A, Manoochehri, M, Margolin, S, Martinez, ME, Mavroudis, D, Menon, U, Mulligan, AM, Murphy, RA, Nevanlinna, H, Nevelsteen, I, Newman, WG, Offit, K, Olshan, AF, Olsson, H, Orr, N, Patel, A, Peto, J, Plaseska-Karanfilska, D, Presneau, N, Rack, B, Radice, P, Rees-Punia, E, Rennert, G, Rennert, HS, Romero, A, Saloustros, E, Sandler, DP, Schmidt, MK, Schmutzler, RK, Schwentner, L, Scott, C, Shah, M, Shu, X-O, Simard, J, Southey, MC, Stone, J, Surowy, H, Swerdlow, AJ, Tamimi, RM, Tapper, WJ, Taylor, JA, Terry, MB, Tollenaar, RAEM, Troester, MA, Truong, T, Untch, M, Vachon, CM, Joseph, V, Wappenschmidt, B, Weinberg, CR, Wolk, A, Yannoukakos, D, Zheng, W, Ziogas, A, Dunning, AM, Pharoah, PDP, Easton, DF, Milne, RL, Lynch, BM
الوصف: OBJECTIVES: Physical inactivity and sedentary behaviour are associated with higher breast cancer risk in observational studies, but ascribing causality is difficult. Mendelian randomisation (MR) assesses causality by simulating randomised trial groups using genotype. We assessed whether lifelong physical activity or sedentary time, assessed using genotype, may be causally associated with breast cancer risk overall, pre/post-menopause, and by case-groups defined by tumour characteristics. METHODS: We performed two-sample inverse-variance-weighted MR using individual-level Breast Cancer Association Consortium case-control data from 130 957 European-ancestry women (69 838 invasive cases), and published UK Biobank data (n=91 105-377 234). Genetic instruments were single nucleotide polymorphisms (SNPs) associated in UK Biobank with wrist-worn accelerometer-measured overall physical activity (nsnps=5) or sedentary time (nsnps=6), or accelerometer-measured (nsnps=1) or self-reported (nsnps=5) vigorous physical activity. RESULTS: Greater genetically-predicted overall activity was associated with lower breast cancer overall risk (OR=0.59; 95% confidence interval (CI) 0.42 to 0.83 per-standard deviation (SD;~8 milligravities acceleration)) and for most case-groups. Genetically-predicted vigorous activity was associated with lower risk of pre/perimenopausal breast cancer (OR=0.62; 95% CI 0.45 to 0.87,≥3 vs. 0 self-reported days/week), with consistent estimates for most case-groups. Greater genetically-predicted sedentary time was associated with higher hormone-receptor-negative tumour risk (OR=1.77; 95% CI 1.07 to 2.92 per-SD (~7% time spent sedentary)), with elevated estimates for most case-groups. Results were robust to sensitivity analyses examining pleiotropy (including weighted-median-MR, MR-Egger). CONCLUSION: Our study provides strong evidence that greater overall physical activity, greater vigorous activity, and lower sedentary time are likely to reduce breast cancer risk. More widespread adoption of active ...
العلاقة: NHMRC/209057; pii: bjsports-2021-105132; Dixon-Suen, S. C., Lewis, S. J., Martin, R. M., English, D. R., Boyle, T., Giles, G. G., Michailidou, K., Bolla, M. K., Wang, Q., Dennis, J., Lush, M., Ahearn, T. U., Ambrosone, C. B., Andrulis, I. L., Anton-Culver, H., Arndt, V., Aronson, K. J., Augustinsson, A., Auvinen, P. ,. Lynch, B. M. (2022). Physical activity, sedentary time and breast cancer risk: a Mendelian randomisation study. BRITISH JOURNAL OF SPORTS MEDICINE, 56 (20), pp.1157-1170. https://doi.org/10.1136/bjsports-2021-105132Test.; http://hdl.handle.net/11343/333469Test
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10دورية أكاديمية
المؤلفون: Wang, SE, Dashti, SG, Hodge, AM, Dixon-Suen, SC, Castano-Rodriguez, N, Thomas, RJS, Giles, GG, Milne, RL, Boussioutas, A, Kendall, BJ, English, DR
الوصف: BACKGROUND: Mechanisms for how Helicobacter pylori infection affects risk of gastroesophageal reflux disease (GERD) and Barrett's esophagus are incompletely understood and might differ by sex. METHODS: In a case-control study nested in the Melbourne Collaborative Cohort Study with 425 GERD cases and 169 Barrett's esophagus cases (identified at 2007-2010 follow-up), we estimated sex-specific odds ratios for participants who were H. pylori seronegative versus seropositive at baseline (1990-1994). To explore possible mechanisms, we (i) compared patterns of H. pylori-induced gastritis by sex using serum pepsinogen-I and gastrin-17 data and (ii) quantified the effect of H. pylori seronegativity on Barrett's esophagus mediated by GERD using causal mediation analysis. RESULTS: For men, H. pylori seronegativity was associated with 1.69-fold [95% confidence interval (CI), 1.03-2.75] and 2.28-fold (95% CI, 1.27-4.12) higher odds of GERD and Barrett's esophagus, respectively. No association was observed for women. H. pylori-induced atrophic antral gastritis was more common in men (68%) than in women (56%; P = 0.015). For men, 5 of the 15 per 1,000 excess Barrett's esophagus risk from being seronegative were mediated by GERD. CONCLUSIONS: Men, but not women, who were H. pylori seronegative had increased risks of GERD and Barrett's esophagus. A possible explanation might be sex differences in patterns of H. pylori-induced atrophic antral gastritis, which could lead to less erosive reflux for men. Evidence of GERD mediating the effect of H. pylori on Barrett's esophagus risk among men supports this proposed mechanism. IMPACT: The findings highlight the importance of investigating sex differences in the effect of H. pylori on risk of GERD and Barrett's esophagus in future studies.
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