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El-Hodiri HM, Bentley JR, Reske AG, Taylor OB, Palazzo I, Campbell WA, Halloy NR, Fischer AJ. Heparin-binding epidermal growth factor and fibroblast growth factor 2 rescue Müller glia-derived progenitor cell formation in microglia- and macrophage-ablated chick retinas. Development 2023; 150:dev202070. [PMID: 37971210 PMCID: PMC10730090 DOI: 10.1242/dev.202070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 11/02/2023] [Indexed: 11/19/2023]
Abstract
Recent studies have demonstrated the impact of pro-inflammatory signaling and reactive microglia/macrophages on the formation of Müller glial-derived progenitor cells (MGPCs) in the retina. In chick retina, ablation of microglia/macrophages prevents the formation of MGPCs. Analyses of single-cell RNA-sequencing chick retinal libraries revealed that quiescent and activated microglia/macrophages have a significant impact upon the transcriptomic profile of Müller glia (MG). In damaged monocyte-depleted retinas, MG fail to upregulate genes related to different cell signaling pathways, including those related to Wnt, heparin-binding epidermal growth factor (HBEGF), fibroblast growth factor (FGF) and retinoic acid receptors. Inhibition of GSK3β, to simulate Wnt signaling, failed to rescue the deficit in MGPC formation, whereas application of HBEGF or FGF2 completely rescued the formation of MGPCs in monocyte-depleted retinas. Inhibition of Smad3 or activation of retinoic acid receptors partially rescued the formation of MGPCs in monocyte-depleted retinas. We conclude that signals produced by reactive microglia/macrophages in damaged retinas stimulate MG to upregulate cell signaling through HBEGF, FGF and retinoic acid, and downregulate signaling through TGFβ/Smad3 to promote the reprogramming of MG into proliferating MGPCs.
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Affiliation(s)
- Heithem M. El-Hodiri
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH 43221, USA
| | - James R. Bentley
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH 43221, USA
| | - Alana G. Reske
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH 43221, USA
| | - Olivia B. Taylor
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH 43221, USA
| | - Isabella Palazzo
- Solomon Snyder Department of Neuroscience, Johns Hopkins University, Baltimore, MD 21205, USA
| | - Warren A. Campbell
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH 43221, USA
| | - Nicklaus R. Halloy
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH 43221, USA
| | - Andy J. Fischer
- Department of Neuroscience, College of Medicine, The Ohio State University, Columbus, OH 43221, USA
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Willows K, Bentley JR. Challenges in Detection and Management of Pre-invasive Glandular Lesions of the Cervix. Indian J Gynecol Oncolog 2019. [DOI: 10.1007/s40944-019-0348-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bentley JR. Minimally-Invasive Radical Hysterectomy for Cancer of the Cervix: The Perspective of the Society of Gynecologic Oncology of Canada (GOC). Journal of Obstetrics and Gynaecology Canada 2019; 41:143-145. [DOI: 10.1016/j.jogc.2018.12.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Loopik DL, Bekkers RLM, Massuger LFAG, Melchers WJG, Siebers AG, Bentley JR. Post-Colposcopy Management and Progression Predictors of Biopsy-Proven CIN1 in Women Under 25 Years. J Obstet Gynaecol Can 2018; 41:292-299. [PMID: 30786980 DOI: 10.1016/j.jogc.2018.06.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Revised: 06/18/2018] [Indexed: 11/19/2022]
Abstract
OBJECTIVE The post-colposcopy management and outcome of cervical intraepithelial neoplasia grade 1 (CIN1) in women under 25 years of age was reviewed, and potential predictors for progression were identified. METHODS Women under 25 with biopsy-proven CIN1 between January 1, 2010, and December 31, 2012 who were seen in the colposcopy clinic at the Queen Elizabeth II Hospital in Halifax, Nova Scotia were retrospectively reviewed. The regression, persistence, and progression rates of CIN1 were evaluated, and the relevant behavioural and biologic factors were reviewed. RESULTS Of the 326 women with a biopsy-proven CIN1, 234 (71.8%) women returned to the regular screening program, and 92 women remained in the colposcopy clinic during follow-up, with a median follow-up time of 26 months. Sixty-two percent of the women had no cervical abnormality, 23.6% of the women had persistent CIN1, and 14.4% of the women showed progression. Eight percent showed progression to CIN2 with a median time of 13 months, whereas 6.4% showed progression to CIN3+ within a median time of 17.5 months. The extent of the lesion (hazard ratio 2.33; 95% CI 1.17-4.64, P = 0.02) and the Pap test result at the initial visit (hazard ratio 2.16; 95% CI 1.22-3.82, P = 0.008) were significantly associated with progression to CIN2+. CONCLUSION On the basis of the 6% risk of CIN3+ and the median time to progression of 17.5 months, follow-up with cytology at 12 months seems acceptable. The extent of the lesion and the Pap test result at the initial visit were identified as risk factors for progression of CIN1.
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Affiliation(s)
- Diede L Loopik
- Department of Obstetrics and Gynaecology, Radboud university medical center, Nijmegen, The Netherlands.
| | - Ruud L M Bekkers
- Department of Obstetrics and Gynaecology, Catharina Hospital, Eindhoven, The Netherlands
| | - Leon F A G Massuger
- Department of Obstetrics and Gynaecology, Radboud university medical center, Nijmegen, The Netherlands
| | - Willem J G Melchers
- Department of Medical Microbiology, Radboud university medical center, Nijmegen, The Netherlands
| | - Albert G Siebers
- Department of Pathology, Radboud university medical center, Nijmegen, The Netherlands
| | - James R Bentley
- Department of Obstetrics and Gynecology, Queen Elizabeth II Health Sciences Centre, Halifax, NS
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Altman AD, Bentley JR, Rittenberg PV, Murray SK. Luteinized Thecomas (“Thecomatosis”) with Sclerosing Peritonitis (LTSP): Report of 2 Cases and Review of an Enigmatic Syndrome Associated with a Peritoneal Proliferation of Specialized (vimentin+/keratin+/CD34+) Submesothelial Fibroblasts. Journal of Obstetrics and Gynaecology Canada 2016; 38:41-50. [DOI: 10.1016/j.jogc.2015.10.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2015] [Accepted: 07/25/2015] [Indexed: 01/09/2023]
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Ball A, Bentley JR, O’Connell C, Kieser KE. Choosing the Right Patient: Planning for Laparotomy or Laparoscopy in the Patient With Endometrial Cancer. Journal of Obstetrics and Gynaecology Canada 2011; 33:468-474. [DOI: 10.1016/s1701-2163(16)34880-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Power P, Stuart G, Oza A, Provencher D, Bentley JR, Miller WH, Pouliot JF. Efficacy of pegylated liposomal doxorubicin (PLD) plus carboplatin in ovarian cancer patients who recur within six to twelve months: a phase II study. Gynecol Oncol 2009; 114:410-4. [PMID: 19520420 DOI: 10.1016/j.ygyno.2009.04.037] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2009] [Revised: 04/21/2009] [Accepted: 04/23/2009] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Pegylated liposomal doxorubicin is one of the preferred alternatives for ovarian cancer patients with early relapse (<6 months) and taxane/carboplatin for late relapse (>12 months), but the optimal therapy for the partially platinum-sensitive (6-12 months) population has not been defined. This single-arm phase II trial was designed to assess the efficacy of pegylated liposomal doxorubicin (PLD)/carboplatin in ovarian cancer patients who relapse between 6 and 12 months after initial treatment with platinum-based chemotherapy. METHODS Ovarian cancer patients who previously completed a course of therapy with paclitaxel/carboplatin were administered PLD 30 mg/m(2) followed by carboplatin AUC 5 mg/mL/minute every 4 weeks. RESULTS Fifty-eight patients were enrolled in the study and 54 were eligible for the efficacy analysis, of whom most (75%) received at least 6 cycles of PLD/carboplatin. The objective response rate was 46% (4% CR and 42% PR), with an additional 33% experiencing disease stabilization >6 months. For those patients with measurable CA-125, the response rate was 66% (28% CR and 38% PR), with an additional 18% experiencing disease stabilization >6 months. Median time-to-progression was 10 months (1.5-25). Median overall survival was 19.1 months (2.2-38.9). The most frequent adverse effects were neutropenia, thrombocytopenia, and constipation. CONCLUSIONS The combination of PLD/carboplatin is efficacious and well tolerated in women with partially platinum-sensitive ovarian cancer and represents a valuable alternative for patients who relapse within 6-12 months of completing paclitaxel/carboplatin chemotherapy.
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Affiliation(s)
- Patti Power
- Dr. H. Bliss Murphy Cancer Centre, St. John's, Newfoundland, Canada A1B 3V6.
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Abstract
OBJECTIVE To estimate the incidence of gestational trophoblastic disease in Nova Scotia and to evaluate the effect of time and maternal age on these rates. METHODS Information on women with a pathologically confirmed diagnosis of gestational trophoblastic disease was extracted from the Nova Scotia Gestational Trophoblastic Disease Registry between 1990 and 2005. The total numbers of deliveries and pregnancies were determined from the Nova Scotia Atlee Perinatal Database and consensus data derived from Statistics Canada. RESULTS Four-hundred twenty-eight women were identified with gestational trophoblastic disease. Hydatidiform moles showed rates of 220/100,000 pregnancies, 264/100,000 total births, and 266/100,000 live births. Rates of partial mole were twofold higher than complete mole (P<.001). The rates of hydatidiform mole were highest in both younger (younger than 20 years old, P=.02) and older age groups (30-34 years old, P=.04, and at least 35 years old, P=.02). The rates of hydatidiform mole were highest in both younger (less than 20 years old, P=.02) and older age groups (30-34 years old, P .04, and 35 or more years old P=.02). The rates of partial moles were significantly higher in women older than 20 years of age (P<.001) and increased with increasing age (P<.001); the reverse trend was seen in complete mole (P<.001). There was no temporal change in rates or average age of hydatidiform mole during the study period. CONCLUSION The rates of hydatidiform mole in Nova Scotia estimated by this population-based study using comprehensive validated information, are higher than most previously reported. Maternal age was a significant factor in the risk for molar pregnancies.
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Affiliation(s)
- Alon D Altman
- Izaak Walton Killam Health Centre, Queen Elizabeth II Health Science Centre, Dalhousie University, Halifax, Nova Scotia, Canada.
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Abstract
OBJECTIVES To explore complementary and alternative medicine (CAM) use among gynaecologic oncology patients in Nova Scotia. METHODS Over a 3-month period, 163 patients were asked to fill out a questionnaire concerning CAM. Those entering the study provided demographic information such as age, address, and employment status, as well as medical information and details of their use of alternative therapies. RESULTS A total of 152 patients were entered into the study, giving a response rate of 93.3%. Of these, 116 had used at least one type of CAM, classifying them as users (76.3%). Women who considered themselves "more religious" were more likely to be CAM users (P = 0.001). There were no significant differences found between users and nonusers with respect to other patient characteristics reported. Patients with cervical cancer were less likely to use CAM than participants with another primary gynaecological malignancy (P = 0.040). The most frequent CAM therapy practised was spirituality/prayer (52.6%). Most women used CAM to improve their physical well-being, and 53.3% of the women were interested in receiving more information on CAM. CONCLUSION A significant number of women undergoing conventional treatment for gynaecologic cancer in Halifax, Nova Scotia, also use CAM. Women are using CAM for numerous reasons and believe they are benefiting from CAM in many ways. Physicians need to be aware of this high usage rate and should explore their patients' attitudes to and opinions about CAM.
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Affiliation(s)
- Deanna J McKay
- Faculty of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
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Abstract
OBJECTIVE To estimate whether the loop electrosurgical excision procedure (LEEP) is associated with an adverse effect on the outcome of subsequent pregnancies. METHODS A retrospective cohort study was performed. The study group comprised women who had a LEEP in Halifax County between 1992 and 1999 and then had a subsequent singleton pregnancy of greater than 20 weeks of gestation with delivery at the IWK Health Centre in Halifax, Nova Scotia. The comparison group comprised women with no history of cervical surgery who were matched for age, parity, smoking status, and year of delivery. There were 571 women in each group. The primary outcome was rate of preterm delivery at less than 37 weeks of gestation. Secondary outcomes included delivery at less than 34 weeks and various neonatal and maternal outcomes. The effect of specific LEEP characteristics was analyzed separately. RESULTS Women who had a LEEP were more likely to deliver preterm overall (7.9% versus 2.5%; odds ratio [OR] 3.50, 95% confidence interval [CI] 1.90-6.95; P < .001) and to deliver preterm after premature rupture of membranes (PROM) (3.5% versus 0.9%; OR 4.10, 95% CI 1.48-14.09). The increase in delivery at less than 34 weeks was not statistically significant (1.25% versus 0.36%; OR 3.50, 95% CI 0.85-23.49; P = .12). Women with LEEP also delivered more low birth weight (LBW) infants (5.4% versus 1.9%; OR 3.00, 95% CI 1.52-6.46; P = .003). There were no differences in other neonatal or maternal outcomes. No association was found between the characteristics of the LEEP, including depth, and the rate of preterm delivery. CONCLUSION Loop electrosurgical excision procedure is associated with an increased risk of overall preterm delivery, preterm delivery after PROM, and LBW infants in subsequent pregnancies at greater than 20 weeks of gestation. Women who are considering future pregnancies should be counseled about these risks during informed consent for LEEP. LEVEL OF EVIDENCE II-2.
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Affiliation(s)
- Sheri-Lee A Samson
- Departments of Obstetrics and Gynecology, Dalhousie University, Halifax, Nova Scotia, Canada.
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Bentley JR, Ferrini RL, Hill LL. American College of Preventive Medicine public policy statement. Folic acid fortification of grain products in the U.S. to prevent neural tube defects. Am J Prev Med 1999; 16:264-7. [PMID: 10198667 DOI: 10.1016/s0749-3797(98)00156-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J R Bentley
- University of California at San Diego (UCSD)/San Diego State University (SDSU) Preventive Medicine Residency Program 92182-4701, USA
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Bentley JR, Delfino RJ, Taylor TH, Howe S, Anton-Culver H. Differences in breast cancer stage at diagnosis between non-Hispanic white and Hispanic populations, San Diego County 1988-1993. Breast Cancer Res Treat 1998; 50:1-9. [PMID: 9802615 DOI: 10.1023/a:1006097601517] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The incidence of breast cancer in the U.S. is lower among Hispanic women than non-Hispanic white women. However, population-based studies show that Hispanic women are more likely to be diagnosed at a later stage than non-Hispanic whites. We aimed to determine whether: 1) a lower proportion of breast cancer was diagnosed at early vs. late stages in Hispanic compared to non-Hispanic white women from 1988-93 in San Diego County, and 2) lower income is related to later stage at diagnosis for both groups. All incident cases of breast cancer in San Diego County from the California Cancer Registry (10,161 cases) were stratified by 'early' (in situ or localized) or 'late' (regional or distant) stage, and by race/ethnicity. Annual average age-adjusted incidence rates/100,000 (AAIR) were calculated. Incidence rate ratios (IRR) (AAIR for early stages divided by AAIR for late stages) were used as a surrogate of early detection. AAIRs for early and late stage disease were significantly higher for non-Hispanic whites (89.3, 42.3) than Hispanic women (46.7, 27.2). The IRR was significantly higher for non-Hispanic whites than Hispanics, (2.11 vs 1.72, p = 0.01). This difference was greatest among women under 50 years old (IRR difference 0.63), and not apparent for women 65 or older (IRR difference 0.06). There was also an association between increasing census tract per capita income and higher rates of early stage disease among non-Hispanic whites but not Hispanics. Results suggest that Hispanic women and lower income women should be targeted for early detection.
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Affiliation(s)
- J R Bentley
- University of California, San Diego, Department of Family and Preventive Medicine, USA
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