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Kinsella SM, Boaden B, El-Ghazali S, Ferguson K, Kirkpatrick G, Meek T, Misra U, Pandit JJ, Young PJ. Handling injectable medications in anaesthesia: Guidelines from the Association of Anaesthetists. Anaesthesia 2023; 78:1285-1294. [PMID: 37492905 DOI: 10.1111/anae.16095] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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] [Accepted: 06/22/2023] [Indexed: 07/27/2023]
Abstract
Peri-operative medication safety is complex. Avoidance of medication errors is both system- and practitioner-based, and many departments within the hospital contribute to safe and effective systems. For the individual anaesthetist, drawing up, labelling and then the correct administration of medications are key components in a patient's peri-operative journey. These guidelines aim to provide pragmatic safety steps for the practitioner and other individuals within the operative environment, as well as short- to long-term goals for development of a collaborative approach to reducing errors. The aim is that they will be used as a basis for instilling good practice.
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Affiliation(s)
- S M Kinsella
- Department of Anaesthesia, University Hospitals Bristol and Weston, Bristol, UK
| | | | - S El-Ghazali
- Department of Anaesthesia and Intensive Care, London North West University Hospital Trust, London, UK
| | - K Ferguson
- Department of Anaesthesia, Aberdeen Royal Infirmary, Aberdeen, UK
| | | | - T Meek
- Department of Anaesthesia, James Cook University Hospital, Middlesbrough, UK
| | - U Misra
- Department of Anaesthesia, South Tyneside and Sunderland NHS Foundation Trust, Sunderland, UK
| | - J J Pandit
- University of Oxford, Oxford, UK
- Nuffield Department of Anaesthesia, Oxford University Hospital NHS Foundation Trust, Oxford, UK
| | - P J Young
- Department of Anaesthesia, Queen Elizabeth Hospital, Kings Lynn, UK
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Thamboo AV, Lee M, Bhutani M, Chan C, Chan Y, Chapman KR, Chin CJ, Connors L, Dorscheid D, Ellis AK, Gall RM, Godbout K, Janjua A, Javer A, Kilty S, Kim H, Kirkpatrick G, Lee JM, Leigh R, Lemiere C, Monteiro E, Neighbour H, Keith PK, Philteos G, Quirt J, Rotenberg B, Ruiz JC, Scott JR, Sommer DD, Sowerby L, Tewfik M, Waserman S, Witterick I, Wright ED, Yamashita C, Desrosiers M. Canadian multidisciplinary expert consensus on the use of biologics in upper airways: a Delphi study. J Otolaryngol Head Neck Surg 2023; 52:30. [PMID: 37095527 PMCID: PMC10127402 DOI: 10.1186/s40463-023-00626-9] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 02/23/2023] [Indexed: 04/26/2023] Open
Abstract
BACKGROUND Chronic rhinosinusitis with nasal polyposis (CRSwNP) often coexists with lower airway disease. With the overlap between upper and lower airway disease, optimal management of the upper airways is undertaken in conjunction with that of the lower airways. Biologic therapy with targeted activity within the Type 2 inflammatory pathway can improve the clinical signs and symptoms of both upper and lower airway diseases. Knowledge gaps nevertheless exist in how best to approach patient care as a whole. There have been sixteen randomized, double-blind, placebo-controlled trails performed for CRSwNP targeted components of the Type 2 inflammatory pathway, notably interleukin (IL)-4, IL-5 and IL-13, IL- 5R, IL-33, and immunoglobulin (Ig)E. This white paper considers the perspectives of experts in various disciplines such as rhinology, allergy, and respirology across Canada, all of whom have unique and valuable insights to contribute on how to best approach patients with upper airway disease from a multidisciplinary perspective. METHODS A Delphi Method process was utilized involving three rounds of questionnaires in which the first two were completed individually online and the third was discussed on a virtual platform with all the panelists. A national multidisciplinary expert panel of 34 certified specialists was created, composed of 16 rhinologists, 7 allergists, and 11 respirologists who evaluated the 20 original statements on a scale of 1-9 and provided comments. All ratings were quantitively reviewed by mean, median, mode, range, standard deviation and inter-rater reliability. Consensus was defined by relative interrater reliability measures-kappa coefficient ([Formula: see text]) value > 0.61. RESULTS After three rounds, a total of 22 statements achieved consensus. This white paper only contains the final agreed upon statements and clear rationale and support for the statements regarding the use of biologics in patients with upper airway disease. CONCLUSION This white paper provides guidance to Canadian physicians on the use of biologic therapy for the management of upper airway disease from a multidisciplinary perspective, but the medical and surgical regimen should ultimately be individualized to the patient. As more biologics become available and additional trials are published we will provide updated versions of this white paper every few years.
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Affiliation(s)
- Andrew V Thamboo
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, St. Paul Sinus Center, University of British Columbia, 2600-1081 Burrard Street, Vancouver, BC, V6Z 1Y6, Canada.
| | - Melissa Lee
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, St. Paul Sinus Center, University of British Columbia, 2600-1081 Burrard Street, Vancouver, BC, V6Z 1Y6, Canada
| | - Mohit Bhutani
- Department of Respirology, University of Alberta, Edmonton, AB, Canada
| | - Charles Chan
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Yvonne Chan
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, ON, Canada
| | - Ken R Chapman
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Christopher J Chin
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, Dalhousie University, Halifax, NS, Canada
| | - Lori Connors
- Department of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Del Dorscheid
- Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Anne K Ellis
- Division of Allergy and Immunology, Department of Medicine, Queen's University, Kingston, ON, Canada
| | - Richard M Gall
- Department of Otolaryngology-Head and Neck Surgery, University of Manitoba, Winnipeg, MB, Canada
| | | | - Arif Janjua
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, St. Paul Sinus Center, University of British Columbia, 2600-1081 Burrard Street, Vancouver, BC, V6Z 1Y6, Canada
| | - Amin Javer
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, St. Paul Sinus Center, University of British Columbia, 2600-1081 Burrard Street, Vancouver, BC, V6Z 1Y6, Canada
| | - Shaun Kilty
- Department of Otolaryngology-Head and Neck Surgery, The University of Ottawa and The Ottawa Hospital, Ottawa, ON, Canada
| | - Harold Kim
- Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, ON, Canada
- Division of Clinical Immunology and Allergy, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Gordon Kirkpatrick
- Division of Respiratory Medicine, University of British Columbia, Vancouver, BC, Canada
| | - John M Lee
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, ON, Canada
| | - Richard Leigh
- Department of Medicine, University of Calgary, Calgary, AB, Canada
| | - Catherine Lemiere
- Department of Medicine, CIUSS du Nord de l'île de Montreal, Université de Montreal, Montreal, QC, Canada
| | - Eric Monteiro
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Helen Neighbour
- Division of Clinical Immunology and Allergy, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Paul K Keith
- Division of Clinical Immunology and Allergy, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Jaclyn Quirt
- Division of Clinical Immunology and Allergy, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Brian Rotenberg
- Department of Otolaryngology-Head and Neck Surgery, Western University, London, ON, Canada
| | - Juan C Ruiz
- Division of Clinical Immunology and Allergy, University of Calgary, Calgary, AB, Canada
| | - John R Scott
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, Dalhousie University, Halifax, NS, Canada
| | - Doron D Sommer
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - Leigh Sowerby
- Department of Otolaryngology-Head and Neck Surgery, Western University, London, ON, Canada
| | - Marc Tewfik
- Department of Otolaryngology-Head and Neck Surgery, McGill University, Montreal, QC, Canada
| | - Susan Waserman
- Division of Clinical Immunology and Allergy, Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Ian Witterick
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, ON, Canada
| | - Erin D Wright
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Alberta, Edmonton, AB, Canada
| | - Cory Yamashita
- Department of Medicine, Western University, London, ON, Canada
| | - Martin Desrosiers
- Division of Otolaryngology-Head and Neck Surgery, Centre Hospitalier de l'Université de Montreal, Montreal, QC, Canada
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Sharma A, Kirkpatrick G, Chen V, Skolnik K, Hollander Z, Wilcox P, Quon BS. Clinical utility of C-reactive protein to predict treatment response during cystic fibrosis pulmonary exacerbations. PLoS One 2017; 12:e0171229. [PMID: 28178305 PMCID: PMC5298271 DOI: 10.1371/journal.pone.0171229] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 01/17/2017] [Indexed: 11/29/2022] Open
Abstract
Rationale C-reactive protein (CRP) is a systemic marker of inflammation that correlates with disease status in cystic fibrosis (CF). The clinical utility of CRP measurement to guide pulmonary exacerbation (PEx) treatment decisions remains uncertain. Objectives To determine whether monitoring CRP during PEx treatment can be used to predict treatment response. We hypothesized that early changes in CRP can be used to predict treatment response. Methods We reviewed all PEx events requiring hospitalization for intravenous (IV) antibiotics over 2 years at our institution. 83 PEx events met our eligibility criteria. CRP levels from admission to day 5 were evaluated to predict treatment non-response, using a modified version of a prior published composite definition. CRP was also evaluated to predict time until next exacerbation (TUNE). Measurements and main results 53% of 83 PEx events were classified as treatment non-response. Paradoxically, 24% of PEx events were characterized by a ≥ 50% increase in CRP levels within the first five days of treatment. Absolute change in CRP from admission to day 5 was not associated with treatment non-response (p = 0.58). Adjusted for FEV1% predicted, admission log10 CRP was associated with treatment non-response (OR: 2.39; 95% CI: 1.14 to 5.91; p = 0.03) and shorter TUNE (HR: 1.60; 95% CI: 1.13 to 2.27; p = 0.008). The area under the receiver operating characteristics (ROC) curve of admission CRP to predict treatment non-response was 0.72 (95% CI 0.61–0.83; p<0.001). 23% of PEx events were characterized by an admission CRP of > 75 mg/L with a specificity of 90% for treatment non-response. Conclusions Admission CRP predicts treatment non-response and time until next exacerbation. A very elevated admission CRP (>75mg/L) is highly specific for treatment non-response and might be used to target high-risk patients for future interventional studies aimed at improving exacerbation outcomes.
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Affiliation(s)
- Ashutosh Sharma
- Department of Medicine, Centre for Heart Lung Innovation, University of British Columbia and St. Paul’s Hospital, Vancouver, British Columbia, Canada
| | - Gordon Kirkpatrick
- Department of Medicine, Division of Respiratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Virginia Chen
- Prevention Of Organ Failure (PROOF) Centre of Excellence, Vancouver, British Columbia, Canada
| | - Kate Skolnik
- Department of Medicine, Division of Respiratory Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Zsuzsanna Hollander
- Prevention Of Organ Failure (PROOF) Centre of Excellence, Vancouver, British Columbia, Canada
| | - Pearce Wilcox
- Department of Medicine, Centre for Heart Lung Innovation, University of British Columbia and St. Paul’s Hospital, Vancouver, British Columbia, Canada
- Department of Medicine, Division of Respiratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bradley S. Quon
- Department of Medicine, Centre for Heart Lung Innovation, University of British Columbia and St. Paul’s Hospital, Vancouver, British Columbia, Canada
- Department of Medicine, Division of Respiratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
- * E-mail:
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Abstract
Nontuberculous mycobacteria (NTM) are found in approximately 10 % of cystic fibrosis (CF) patients, but only a portion will develop NTM disease. The management of CF lung disease should be optimized, including antibiotic therapy targeted to the individual's usual airway bacteria, prior to considering treatment for NTM lung disease. Those who meet criteria for NTM lung disease may not necessarily require treatment and could be monitored expectantly if symptoms and radiographic findings are minimal. However, the presence of Mycobacterium abscessus complex (MABSC), severe lung disease, and/or anticipated lung transplant should prompt NTM therapy initiation. For CF patients with Mycobacterium avium complex (MAC), recommended treatment includes triple antibiotic therapy with a macrolide, rifampin, and ethambutol. Azithromycin is generally our preferred macrolide in CF as it is better tolerated and has fewer drug-drug interactions. MABSC treatment is more complex and requires an induction phase (oral macrolide and two IV agents including amikacin) as well as a maintenance phase (nebulized amikacin and two to three oral antibiotics including a macrolide). The induction phase may range from one to three months (depending on infection severity, treatment response, and medication tolerability). For both MAC and MABSC, treatment duration is extended 1-year post-culture conversion. However, in patients who do not achieve culture negative status but tolerate therapy, we consider ongoing treatment for mycobacterial suppression and prevention of disease progression.
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Affiliation(s)
- Kate Skolnik
- Department of Medicine, Division of Respirology, University of Calgary, Calgary, Alberta Canada
- Department of Medicine, Division of Respirology, University of British Columbia, Vancouver, BC Canada
- Rockyview General Hospital Respirology Offices, 7007 14th Street SW, Calgary, AB T2V 1P9 Canada
| | - Gordon Kirkpatrick
- Department of Medicine, Division of Respirology, University of British Columbia, Vancouver, BC Canada
| | - Bradley S. Quon
- Department of Medicine, Division of Respirology, University of British Columbia, Vancouver, BC Canada
- Centre for Heart Lung Innovation, University of British Columbia, Vancouver, BC Canada
- St. Paul’s Hospital, 8B Providence Wing, 1081 Burrard Street, Vancouver, BC V6Z 1Y6 Canada
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Ren H, Ferguson K, Kirkpatrick G, Vinning T, Chow V, Ma S. Altered Crossover Distribution and Frequency in Spermatocytes of Infertile Men with Azoospermia. PLoS One 2016; 11:e0156817. [PMID: 27273078 PMCID: PMC4894629 DOI: 10.1371/journal.pone.0156817] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 05/19/2016] [Indexed: 11/25/2022] Open
Abstract
During meiosis, homologous chromosomes pair to facilitate the exchange of DNA at crossover sites along the chromosomes. The frequency and distribution of crossover formation are tightly regulated to ensure the proper progression of meiosis. Using immunofluorescence techniques, our group and others have studied the meiotic proteins in spermatocytes of infertile men, showing that this population displays a reduced frequency of crossovers compared to fertile men. An insufficient number of crossovers is thought to promote chromosome missegregation, in which case the faulty cell may face meiotic arrest or contribute to the production of aneuploid sperm. Increasing evidence in model organisms has suggested that the distribution of crossovers may also be important for proper chromosome segregation. In normal males, crossovers are shown to be rare near centromeres and telomeres, while frequent in subtelomeric regions. Our study aims to characterize the crossover distribution in infertile men with non-obstructive (NOA) and obstructive azoospermia (OA) along chromosomes 13, 18 and 21. Eight of the 16 NOA men and five of the 21 OA men in our study displayed reduced crossover frequency compared to control fertile men. Seven NOA men and nine OA men showed altered crossover distributions on at least one of the chromosome arms studied compared to controls. We found that although both NOA and OA men displayed altered crossover distributions, NOA men may be at a higher risk of suffering both altered crossover frequencies and distributions compared to OA men. Our data also suggests that infertile men display an increase in crossover formation in regions where they are normally inhibited, specifically near centromeres and telomeres. Finally, we demonstrated a decrease in crossovers near subtelomeres, as well as increased average crossover distance to telomeres in infertile men. As telomere-guided mechanisms are speculated to play a role in crossover formation in subtelomeres, future studies linking crossover distribution with telomere integrity and sperm aneuploidy may provide new insight into the mechanisms underlying male infertility.
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MESH Headings
- Adult
- Aneuploidy
- Azoospermia/epidemiology
- Azoospermia/genetics
- Case-Control Studies
- Chromosome Segregation
- Chromosomes, Human, Pair 13
- Chromosomes, Human, Pair 18
- Chromosomes, Human, Pair 21
- Crossing Over, Genetic
- Humans
- Incidence
- Infertility, Male/epidemiology
- Infertility, Male/genetics
- Male
- Meiosis/genetics
- Middle Aged
- Recombination, Genetic
- Semen Analysis/statistics & numerical data
- Spermatocytes/metabolism
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Affiliation(s)
- He Ren
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, B.C., Canada
| | - Kyle Ferguson
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, B.C., Canada
| | - Gordon Kirkpatrick
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, B.C., Canada
| | - Tanya Vinning
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, B.C., Canada
| | - Victor Chow
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, B.C., Canada
| | - Sai Ma
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, B.C., Canada
- * E-mail:
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Ren H, Ferguson K, Kirkpatrick G, Vinning T, Chow V, Ma S. Altered crossover distribution and distance to telomeres in spermatocytes of infertile men. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.909] [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: 11/16/2022]
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Kirkpatrick G, Ren H, Liehr T, Chow V, Ma S. Meiotic and sperm aneuploidy studies in three carriers of Robertsonian translocations and small supernumerary marker chromosomes. Fertil Steril 2015; 103:1162-9.e7. [PMID: 25796321 DOI: 10.1016/j.fertnstert.2015.02.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 02/03/2015] [Accepted: 02/05/2015] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To study the meiotic behaviour of one carrier of a small supernumerary marker chromosome (sSMC): 47,XY,+mar; one carrier of a Robertsonian translocation (ROB): 45,XY,rob(13;21) (q10;q10); and one carrier of both a sSMC and a ROB: 46,XY,rob(13;21) (q11.1;q11.1),+mar. DESIGN Case-control study. SETTING University-affiliated research center and hospital. PATIENT(S) Subfertile men with ROB and sSMC. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) The chromosomal origin of the sSMC was assessed by multiplex fluorescence in situ hybridization. The segregation of the ROB and sSMC in sperm and possible interchromosomal effects were examined by fluorescence in situ hybridization. Synapsis, meiotic recombination, and meiotic inactivation were investigated in ejaculate spermatocytes of the 47,XY,+mar and 45,XY,rob(13;21) carriers using immunostaining. RESULT(S) In the 47,XY,+mar and 46,XY,rob(13;21),+mar carriers, the sSMC was found in 13.5% and 11.5 % of sperm, respectively. Analysis of meiotic segregation of chromosome 13 and 21 showed that 91.2% of sperm were normal/balanced in the 46,XY,rob(13;21),+mar case, whereas 88.4% of sperm were normal/balanced in the 45,XY,rob(13;21) case. Interchromosomal effects involving the sex chromosomes were found in both sSMC carriers. Both 47,XY,+mar and 45,XY,rob(13;21) carriers showed decreased global recombination, impaired synapsis, and an association of abnormal chromosomes with the XY body. CONCLUSION(S) Carriers of marker chromosomes produce sperm with markers at frequencies lower than theoretically expected. Carriers of ROB and sSMC showed decreased recombination, impaired synapsis, and association of abnormal chromosomes with the XY body, which may contribute to an interchromosomal effect. Using immunofluorescence techniques to analyze ejaculate-derived spermatocytes from subfertile men provides a novel technique for examining meiosis without the need for a testicular biopsy.
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Affiliation(s)
- Gordon Kirkpatrick
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada
| | - He Ren
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Thomas Liehr
- Institute of Human Genetics, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Victor Chow
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Sai Ma
- Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, British Columbia, Canada.
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Kirkpatrick G, Ma S. Meiotic segregation and interchromosomal effects in a rare (1:2:10) complex chromosomal rearrangement. J Assist Reprod Genet 2011; 29:77-81. [PMID: 22105185 DOI: 10.1007/s10815-011-9655-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2011] [Accepted: 10/19/2011] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Complex chromosomal rearrangements (CCR) are rare rearrangements involving more than two chromosomes and more than two breakpoints. CCR are associated with male infertility as a result of the disruption of spermatogenesis due to complex meiotic configurations and the production of chromosomally abnormal sperm. We examined a carrier of a t(1:2:10) CCR in order to determine the patterns of segregation and any presence of an interchromosomal effect (ICE). METHODS Centromeric, locus specific and telomeric probes (Vysis, USA) were used for the study. On ~1,000 sperm nuclei from the reciprocal translocation carrier, dual color Fluorescence in situ hybridization (FISH) was performed on each of the involved chromosomes to determine the patterns of segregation. FISH was also performed on chromosome 13, 18, 21, X and Y to determine any ICE. RESULTS We observed abnormal chromosome complements in 24.3%, 19.5% and 15.8% of sperm for chromosomes 2, 10 and 1, respectively. There was a significantly increased rate of ICEs for chromosomes 13 and 21 when compared with controls. CONCLUSIONS CCR may present a lower risk for producing unbalanced chromosomes than other studies have indicated. CCRs may be at an increased risk for ICE especially among acrocentric chromosomes.
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Affiliation(s)
- Gordon Kirkpatrick
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, Canada
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Kirkpatrick G, Chow V, Ma S. Meiotic recombination, synapsis, meiotic inactivation and sperm aneuploidy in a chromosome 1 inversion carrier. Reprod Biomed Online 2011; 24:91-100. [PMID: 22116071 DOI: 10.1016/j.rbmo.2011.09.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2011] [Revised: 09/19/2011] [Accepted: 09/21/2011] [Indexed: 10/17/2022]
Abstract
Disrupted meiotic behaviour of inversion carriers may be responsible for suboptimal sperm parameters in these carriers. This study investigated meiotic recombination, synapsis, transcriptional silencing and chromosome segregation effects in a pericentric inv(1) carrier. Recombination (MLH1), synapsis (SYCP1, SYCP3) and transcriptional inactivation (γH2AX, BRCA1) were examined by fluorescence immunostaining. Chromosome specific rates of recombination were determined by fluorescence in-situ hybridization. Furthermore, testicular sperm was examined for aneuploidy and segregation of the inv(1). Our findings showed that global recombination rates were similar to controls. Recombination on the inv(1) and the sex chromosomes were reduced. The inv(1) associated with the XY body in 43.4% of cells, in which XY recombination was disproportionately absent, and 94.3% of cells displayed asynapsed regions which displayed meiotic silencing regardless of their association with the XY body. Furthermore, a low frequency of chromosomal imbalance was observed in spermatozoa (3.4%). Our results suggest that certain inversion carriers may display unimpaired global recombination and impaired recombination on the involved and the sex chromosomes during meiosis. Asynapsis or inversion-loop formation in the inverted region may be responsible for impaired spermatogenesis and may prevent sperm-chromosome imbalance.
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Affiliation(s)
- Gordon Kirkpatrick
- Department of Obstetrics and Gynaecology, University of British Columbia, Vancouver, BC, Canada V6H-3N1
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Kirkpatrick G, Ferguson KA, Gao H, Tang S, Chow V, Yuen BH, Ma S. A comparison of sperm aneuploidy rates between infertile men with normal and abnormal karyotypes. Hum Reprod 2008; 23:1679-83. [DOI: 10.1093/humrep/den126] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kirkpatrick G, Wang EC, Ferguson K, Ma S. Interchromosomal effects in sperm of three heterozygous carriers of structural chromosomal rearrangements. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.819] [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: 10/22/2022]
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Laughlin MJ, Kirkpatrick G, Sabiston N, Peters W, Kurtzberg J. Hematopoietic recovery following high-dose combined alkylating-agent chemotherapy and autologous bone marrow support in patients in phase-I clinical trials of colony-stimulating factors: G-CSF, GM-CSF, IL-1, IL-2, M-CSF. Ann Hematol 1993; 67:267-76. [PMID: 7506580 DOI: 10.1007/bf01696346] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Hematopoietic recovery in 115 patients with metastatic breast cancer or metastatic melanoma, enrolled in phase-I studies of recombinant growth factors while undergoing treatment with high-dose chemotherapy with autologous bone marrow support, was examined with assays of bone marrow progenitor cells and peripheral blood progenitor cells, and by evaluation of peripheral blood counts. Groups of patients receiving hematopoietic cytokine support [with interleukin-1 (IL-1), interleukin-2 (IL-2), granulocyte colony-stimulating factor (G-CSF), granulocyte-macrophage CSF (GM-CSF), or monocyte CSF (M-CSF)] post marrow infusion were compared with contemporaneous control patients not receiving growth factor support. Patients receiving GM-CSF demonstrated statistically significant increases in the growth of granulocyte/macrophage colony-forming units (CFU-GM) in the bone marrow and peripheral blood compared with control patients. The effect of GM-CSF was dose dependent in the early period post marrow infusion (day +6) with bone marrow CFU-GM colonies at doses 8-16 micrograms/kg/day 34 times those measured in controls. Significant increases in bone marrow multipotential progenitor cells (CFU-GEMM) were seen in patients receiving GM-CSF day +21 post marrow infusion. Patients receiving IL-1 demonstrated significant increases in bone marrow CFU-GM at day +21, maximal at dosages of 24-32 ng/kg/day. There were no significant increases in burst forming unit-erythroid (BFU-E) among any study group. Patients receiving G-CSF had significantly increased absolute neutrophil counts (ANC) and total white blood cell counts (WBC) by day +11 post transplant compared with control patients. Patients receiving GM-CSF demonstrated significantly increased WBC (greater than 2000/mm3) at day +11 and ANC greater than 500/mm3 at day +16. Optimal dose of G-CSF and GM-CSF to stimulate neutrophil recovery post transplant was 4-8 micrograms/kg/day and 8-16 micrograms/kg/day, respectively. Platelet recovery did not differ among the six study groups. These data demonstrate accelerated myeloid recovery after high-dose chemotherapy and autologous bone marrow support in patients receiving either G-CSF or GM-CSF. Moreover, GM-CSF and IL-1 stimulate myelopoiesis at the level of bone marrow CFU-GM, while G-CSF causes earlier neutrophil recovery peripherally.
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Affiliation(s)
- M J Laughlin
- Duke University Bone Marrow Transplant Program, Duke University Medical Center, Durham, NC
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Kirkpatrick G. Hospital accounting. Breaking the book keeper mould. Health Soc Serv J 1985; 95:288. [PMID: 10270998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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