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Murdoch A, Madore F, Sparkes D, Tennankore K, Vorster H, Suri R. POS-491 A NEW VISION FOR NEPHROLOGY TRIALS IN CANADA. Kidney Int Rep 2021. [DOI: 10.1016/j.ekir.2021.03.518] [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: 10/21/2022] Open
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Barriteau CM, Murdoch A, Gallagher SJ, Thompson AA. A patient-centered medical home model for comprehensive sickle cell care in infants and young children. Pediatr Blood Cancer 2020; 67:e28275. [PMID: 32277797 DOI: 10.1002/pbc.28275] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 02/28/2020] [Accepted: 03/02/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND The patient-centered medical home (PCMH) has been proposed as a model for comprehensive care coordination and delivery for children with sickle cell disease (SCD), yet little is known regarding the implementation of PCMH core concepts on adherence to preventative care measures, health care utilization, and parent satisfaction. PROCEDURE We implemented the newborn cohort clinic (NCC) to explore the application of the PCMH model for infants and children with SCD from birth to age 3 years in 2011. In July 2017, we conducted a retrospective chart review to evaluate subjects currently or previously followed in the clinic. We surveyed parents in the NCC to assess their satisfaction with their experience. RESULTS A total of 112 patients have been managed in the NCC. All patients received penicillin prophylaxis, while 70% and 73% of patients, respectively, received the 23-valent pneumococcal vaccine and an initial transcranial Doppler by age 36 months. Most (92 of 112) of the subjects utilized the emergency department (569 encounters), with 86% of encounters for fever or other sickle cell-related complications. The majority of parents indicated satisfaction with the clinic, with 71% saying clinic providers always or usually spent enough time with their child, listened carefully to them (81%) and were sensitive to family values and customs (77%). CONCLUSIONS A comprehensive sickle cell clinic as a component of a PCMH is feasible and can achieve high levels of preventative care. Parents are largely satisfied with this model of care.
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Affiliation(s)
- Christina M Barriteau
- Division of Hematology and Oncology, Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States
| | - Alexandra Murdoch
- Division of Hematology and Oncology, Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States
| | - Shannon J Gallagher
- Division of General Surgery, Sanford School of Medicine, University of South Dakota, Sioux Falls, South Dakota, United States
| | - Alexis A Thompson
- Division of Hematology and Oncology, Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, United States
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Hoyle S, Bonavita A, Murdoch A, Brown M, Howard W, Booth C. Validation of human, rat and mouse intestinal organoid models as preclinical screens to assess GI toxicity in novel oncology drug development. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32823-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Jaroudi S, Konstantinidis M, Alfarawati S, Fragouli E, Wells D, Bianchi V, Jaroudi SJS, Baban DBD, Knight SKS, Borini ABA, Fragouli EFE, Wells DWD, Basile N, Bronet F, Nogales MC, Martinez E, Ariza M, Agudo D, Florensa M, Riqueros M, Meseguer M, Hyslop L, Prathalingam N, Clapham E, Nowak L, Dunkley E, Fenwick J, Byerley S, Murdoch A, Herbert M, Wong KM, Van Echten-Arends J, Korevaar JC, van der Veen F, Repping S, Mastenbroek S, Assou S, Haouzi D, Ferrieres A, Dechaud H, Hamamah S. Session 27: Genes and chromosomes in oocytes and embryos. Hum Reprod 2013. [DOI: 10.1093/humrep/det155] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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Murdoch A. C22 Stem cells and the IVF clinic. Reprod Biomed Online 2010. [DOI: 10.1016/s1472-6483(10)62276-6] [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: 11/15/2022]
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Hall VJ, Compton D, Stojkovic P, Nesbitt M, Herbert M, Murdoch A, Stojkovic M. Developmental competence of human in vitro aged oocytes as host cells for nuclear transfer. Hum Reprod 2006; 22:52-62. [PMID: 16957049 DOI: 10.1093/humrep/del345] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [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: 11/13/2022] Open
Abstract
BACKGROUND Improving human nuclear transfer (NT) efficiencies is paramount for the development of patient-specific stem cell lines, although the opportunities remain limited owing to difficulties in obtaining fresh mature oocytes. METHODS Therefore, the developmental competence of aged, failed-to-fertilize human oocytes as an alternate cytoplasmic source for NT was assessed and compared with use of fresh, ovulation-induced oocytes. To further characterize the developmental potential of aged oocytes, parthenogenetic activation, immunocytochemical analysis of essential microtubule proteins involved in meiotic and mitotic division, and RT-PCR in single oocytes (n = 6) was performed to determine expression of oocyte-specific genes [oocyte-specific histone 1 (H1FOO), growth differentiation factor 9 (GDF9), bone morphogenetic protein 15 (BMP15), zygote arrest 1 (ZAR1)] and microtubule markers [nuclear mitotic arrest (NuMA), minus-end directed motor protein HSET and the microtubule kinesin motor protein EG5]. RESULTS For NT, enucleation and fusion rates of aged oocytes were significantly lower compared with fresh oocytes (P < 0.05). Cleavage rates and subsequent development were poor. In addition, parthenote cleavage was low. Immunocytochemical analysis revealed that many oocytes displayed aberrant expression of NuMA and EG5, had disrupted meiotic spindles and tetrapolar spindles. One of the six oocytes misexpressed GDF9, BMP15 and ZAR1. Two oocytes expressed EG5 messenger RNA (mRNA), and HSET and NuMA were not detectable. RT-PCR of mRNA for oocyte specific genes and microtubule markers in single aged oocytes. CONCLUSIONS Thus, aneuploidy and spindle defects may contribute to poor parthenogenetic development and developmental outcomes following NT.
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Affiliation(s)
- V J Hall
- Centre for Stem Cell Biology and Developmental Genetics, Institute of Human Genetics, University of Newcastle upon Tyne, UK
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Hall V, Compton D, Stojkovic P, Nesbitt M, Herbert M, Murdoch A, Stojkovic M. 36 DEVELOPMENTAL COMPETENCE OF HUMAN AGED OOCYTES AS HOST CELLS FOR NUCLEAR TRANSFER. Reprod Fertil Dev 2006. [DOI: 10.1071/rdv18n2ab36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The use of aged metaphase II oocytes (cultured in vitro for more than 14 h) for somatic cell nuclear transfer (SCNT) in varying species has resulted in lower developmental outcomes compared with non-aged in vitro- or in vivo-matured oocytes. However, due to limited resources of fresh oocytes for the derivation of nuclear transfer stem cell lines, further investigation in using spare oocytes is required. Aged spare oocytes (48 h post oocyte retrieval) were consigned for research (under HFEA and local ethics approval) by couples undergoing either in vitro fertilization (failed IVF oocytes, f-IVF) or intracytoplasmic sperm injection (failed-ICSI oocytes, f-ICSI) treatments. Aged oocytes were randomly assigned for double-labeling immunocytochemical analysis (f-IVF, n = 10; f-ICSI, n = 7) for the microtubule markers, NuMA and �-tubulin, or parthenogenetic activation. Immunocytochemical analysis was performed as previously described (Chatzimeletiou et al. 2005 Hum. Reprod. 20, 672-682) using primary anti-rabbit NuMA (gift from D. Compton, Dartmouth Medical School, Hanover, NH, USA) and anti-mouse DM1-�. Secondary antibodies were donkey anti-rabbit and anti-mouse immunoglobulins. Oocytes were counterstained with Hoechst 33342. Negative controls were performed as above with blocking solution substituting for primary antibodies. Parthenogenetic activation was performed for 4 h using 10 �M calcium ionophore (5 min) and 2 mM 6-dimethylaminopurine (Ca-I/DMAP) for f-IVF (n = 10) and f-ICSI oocytes (n = 11) or 10 �g/mL puromycin (Ca-I/Pur) for f-IVF (n = 12) and f-ICSI oocytes (n = 10) (4 h). Activated oocytes were cultured in a biphasic system, G1.3" and G2.3" (Vitrolife UK, Ltd., Ediburgh, Lothian, UK) for 5 days at 37 �C in 5% CO2 in humidified air. NuMA was localized to the metaphase spindle in 6/10 (60%) and 7/7 (100%) oocytes for f-IVF and f-ICSI, respectively, and/or in cytoplasmic cytasters. One f-IVF oocyte and four f-ICSI oocytes had visible tetrapolar spindles. Unusual patterns of diffuse NuMA staining containing dense foci within these regions, but not associated with the cytasters or metaphase spindle, were also observed in two f-IVF oocytes. The majority of oocytes displayed ring-like staining of DM1-�, which was aberrant in two f-ICSI oocytes. Parthenogenetic development was poor for both treatments. Cleavage rates were 17% and 20% for f-IVF using Ca-I/PUR and Ca-I/DMAP, respectively, and 40% and 45% for f-ICSI using Ca-I/PUR and Ca-I/DMAP, respectively. Fragmentation rates were high across all treatments. No parthenogenetic embryos developed beyond the 6-cell stage. Thus, the use of aged human oocytes for SCNT may be difficult due to their incapacity to artificially activate using current activation protocols and, in addition, due to the microtubule abnormalities observed in many of these aged oocytes.
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Abstract
INTRODUCTION The majority of patients with musculo-skeletal problems referred to hospitals in the UK have to wait for months, if not over a year, before finally seeing an orthopaedic surgeon. In Stobhill Hospital, Glasgow, the waiting time for an out-patient appointment was 182 days in 1995, with only 20% of the referrals requiring surgery. The aim of this paper was to reduce the out-patient waiting times based on a co-ordinated team approach. METHODS An outpatient musculo-skeletal service was developed over a 7-year period at Stobhill Hospital. The traditional consultant-based model, in which the consultant and a trainee saw all new patients referred to the hospital, was gradually replaced with a team approach, based on continuous reconfiguration of the roles of the orthopaedic surgeon and rheumatologist and extending the roles of nurses, physiotherapists and podiatrists. This was achieved by: (i) protocol-based daily triage for all referrals to the most appropriate health professional in the team, by the senior out-patient nursing staff; (ii) allocation of appointments based on clinical priority, with a fast-track for urgent cases; and (iii) improvement of inter-disciplinary communication, facilitating the retraction as well as the extension of traditional roles. RESULTS Despite the number of GP referrals to the orthopaedic out-patient department at Stobhill nearly doubling in a period of 5 years, the out-patient waiting time decreased by about 50% (90 days from 182 days). This reduction in waiting times improved patient and GP satisfaction levels. We also noticed an improved morale and personal development of the health professionals as they saw patients appropriate to their skills and expertise. CONCLUSION The team's experience demonstrates the effectiveness of a team approach in tackling what is often seen as the insoluble problem of orthopaedic waiting times. This is based on excellent communication and collaboration, with a clear aim of improving patient care that is evidence based.
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Evans DE, Doyle EJ, Frigione D, Hellermann MV, Murdoch A. Measurement of long wavelength turbulence in a Tokamak by extreme far forward scattering. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0032-1028/25/6/003] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Fleming R, Lloyd F, Herbert M, Fenwick J, Griffiths T, Murdoch A. Effects of profound suppression of luteinizing hormone during ovarian stimulation on follicular activity, oocyte and embryo function in cycles stimulated with purified follicle stimulating hormone. Hum Reprod 1998; 13:1788-92. [PMID: 9740424 DOI: 10.1093/humrep/13.7.1788] [Citation(s) in RCA: 120] [Impact Index Per Article: 4.6] [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: 11/14/2022] Open
Abstract
The effects of profound suppression of circulating luteinizing hormone (LH) during the follicular phase of in-vitro fertilization cycles were explored in normal women during treatment with a gonadotrophin-releasing hormone analogue and exogenous purified follicle stimulating hormone. Ovarian responses to treatment and the capacity of supernumerary embryos to undergo blastocyst formation were examined in groups of patients defined by the concentration of plasma LH in the mid-follicular phase. Concentrations < or = 0.5 IU/I diagnosed the group with profoundly suppressed LH (<LH, n = 20), which was compared with the remaining patients (nLH, n = 41). The <LH group showed lower oestradiol concentrations at human chorionic gonadotrophin administration, while the total follicular development estimated by the total follicular diameters was similar in both groups. The oestradiol secreted per follicle, estimated by the circulating concentration per mm total follicular diameter, was significantly lower in the <LH group. The combined effects of a trend to lower yield of oocytes (not significant) and a lower fertilization rate (not significant) resulted in a significantly reduced quantity of embryos available for cryopreservation after the fresh transfer. Supernumerary embryos were cultured for 7 days to determine blastocyst development rates, and the degree of LH suppression made no difference to embryo developmental competence (nLH, 23%; <LH, 27%), or the rates of blastocyst formation. The group of patients with profoundly suppressed mid-follicular phase LH showed a reduced yield of oocytes and embryos which resulted in significantly fewer embryos available for cryopreservation. However, the developmental potential of those embryos, represented by the ability to form blastocysts in vitro, was unaffected.
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Affiliation(s)
- R Fleming
- University Department of Obstetrics and Gynaecology, Royal Infirmary, Glasgow, UK
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Murdoch A. Triplets and embryo transfer policy. Hum Reprod 1997; 12:88-92. [PMID: 9433962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The social and financial consequences of multiple pregnancies following embryo transfer have led us to question our policies and re-evaluate 'good practice' recommendations. A postal survey was carried out to assess current practice regarding embryo transfer policy and to understand the factors on which these decisions are based. The results demonstrated a wide variation in practice throughout the country despite the finding that most centres use the same criteria on which to base their decision to transfer either two or three embryos. Doctors seem to be the most influential individuals in the decision-making process, although when three embryos are transferred, the opinion of the patient is paramount. Patients are usually given information about the risks of multiple pregnancy but despite this, 69% felt that a multiple pregnancy would be the ideal outcome of in-vitro fertilization (IVF). It is strongly advised that patients are given more details of the consequences of multiple pregnancy and that centres which have a high multiple pregnancy rate adopt a policy of transferring only two embryos.
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Affiliation(s)
- A Murdoch
- Centre for Reproductive Medicine, RVI Trust, Newcastle upon Tyne, UK
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Clouston HJ, Fenwick J, Webb AL, Herbert M, Murdoch A, Wolstenholme J. Detection of mosaic and non-mosaic chromosome abnormalities in 6- to 8-day old human blastocysts. Hum Genet 1997; 101:30-6. [PMID: 9385365 DOI: 10.1007/s004390050581] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [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: 02/05/2023]
Abstract
A reliable technique has been developed for the production of good quality G-banded chromosome preparations from 6- to 8-day-old human blastocysts (20-800 cell stage) from an in vitro fertilization programme. The technique involves a thymidine cell division synchronization step to reduce the exposure time to colcemid, in conjunction with a simple 70% acetic acid disaggregation procedure to produce discrete metaphases for analysis. Of 105 blastocysts processed by this technique, 9 were lost during handling and 10 showed no dividing cells. The remaining 86 produced useful separate metaphases with a mean mitotic activity of 6.5%. A full G-banded karyotype was obtained from 1-6 cells in 55 blastocysts (64%), incomplete G-banded analysis but with full information of ploidy was obtained from 18 blastocysts (21%), with 13 (15%) producing no useful cytogenetic results. Abnormalities observed included polyploidy, diploid/polyploid mosaicism, non-mosaic trisomy 16 (2 cases), 46,Xdel(X)-(q21)/46,XX (1 case) and several single cells with trisomies or structural anomalies in otherwise normal blastocysts. Variable levels of structural chromosome damage, with apparent interchanges, chromosome branching and anomalous chromatid pairing were also seen.
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Affiliation(s)
- H J Clouston
- Department of Human Genetics, University of Newcastle upon Tyne, UK
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Lloyd F, Herbert M, Fenwick J, Griffiths T, Murdoch A, Fleming R. O-205. Prospective determination of the effects of profound LH suppression on follicular activity and oocyte and embryo function in cycles stimulated with purified FSH. Hum Reprod 1997. [DOI: 10.1093/humrep/12.suppl_2.101-a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
The relationship between the menstrual cycle and insulin sensitivity is unclear. The aim of this study was to investigate insulin sensitivity during the normal menstrual cycle using the physiological insulin target organ adipose tissue. A total of 23 normal healthy volunteers were studied, nine of whom were in the follicular phase, and 14 of whom were age and body mass index-matched and in the luteal phase of the menstrual cycle. Adipocyte insulin receptor binding was measured and adipocyte insulin action was assessed by measuring initial rates of 3-O-methylglucose uptake and by inhibition of lipolysis. The maximum specific insulin receptor binding was significantly higher in subjects studied during the follicular phase of the menstrual cycle compared to subjects studied during the luteal phase (1.81 +/- 0.13 versus 1.36 +/- 0.15% per 10 cm2 cell surface, P < 0.05). Maximum rates of 3-O-methylglucose transport were 1.70 +/- 0.22 versus 1.75 +/- 0.22 pmol/10 cm2/5 s in the follicular and luteal phase respectively and were not significantly different between the two groups. The maximum percentage lipolysis inhibition observed was 42. 5 +/- 7.5% in the follicular phase and 39.9 +/- 7.4% in the luteal phase (not significant). This study demonstrated that there is a reduction in insulin receptor binding in the luteal phase of the normal ovulatory menstrual cycle. The post-receptor action of insulin is not affected between the two phases of the menstrual cycle.
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Affiliation(s)
- P J Marsden
- Centre for Reproductive Medicine, Royal Victoria Infirmary, Queen Victoria Road, Newcastle upon Tyne NE1 4LP, UK
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Murdoch A. Investigation of sex abuse in Irish hospital expands. West J Med 1996. [DOI: 10.1136/bmj.312.7025.201a] [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: 11/04/2022]
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Abstract
Adipose tissue was used to characterize the metabolic abnormality of insulin resistance in polycystic ovary syndrome (PCOS). Nine patients with PCOS were studied during a period of amenorrhea and confirmed to be chronically anovulatory by vaginal ultrasound and plasma progesterone measurements. These were compared with six age- and body mass index (BMI)-matched controls (BMI, 27.2 +/- 2.2 in PCOS and 24.7 +/- 2.3 in control subjects). Insulin receptor binding was measured and insulin action was assessed by measuring initial rates of 3-O-methylglucose uptake and by inhibition of lipolysis. The maximum specific insulin receptor binding was 0.62% +/- 0.12% and 1.78% +/- 0.18% per 10-cm2 cell surface (mean +/- SEM) in PCOS and control subjects, respectively (P < .001). Maximum rates of glucose transport were also impaired as compared with controls, with 3-O-methylglucose transport being 0.90 +/- 0.15 versus 1.57 +/- 0.28 pmol/10 cm2/5 s, respectively (P < .05). The concentration of insulin required for half-maximal stimulation of glucose uptake was 165 +/- 36 versus 32 +/- 10 pmol in PCOS and control subjects, respectively (P < .05). The maximum percentage lipolysis inhibition (mean +/- SEM) was 9.5% +/- 1.6% in PCOS and 28.3% +/- 7.2% in control patients, respectively (P < .01). These data demonstrate that there are both insulin binding and postreceptor defects in adipocytes from amenorrheic PCOS subjects. The degree of defect in adipocyte insulin action is greater than would have been anticipated from in vivo data.
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Affiliation(s)
- P J Marsden
- Department of Medicine, University of Newcastle-upon-Tyne, UK
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Karcher H, Spurgeon D, Essex C, Charatan FB, Christie B, Dolley M, Murdoch A, Nandan G, Dorozynski A. Hospital closures. West J Med 1994. [DOI: 10.1136/bmj.309.6960.973] [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: 11/04/2022]
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Murdoch A, Jenkinson EJ, Johnson GD, Owen JJ. Alkaline phosphatase-fast red, a new fluorescent label. Application in double labelling for cell cycle analysis. J Immunol Methods 1990; 132:45-9. [PMID: 2118160 DOI: 10.1016/0022-1759(90)90396-d] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [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: 12/30/2022]
Abstract
We have observed that the red reaction product of alkaline phosphatase immuno-conjugates and certain substrate preparations produces a brilliant red fluorescence that is visible by fluorescence microscopy using both fluorescein and rhodamine filter combinations. This provides a level of sensitivity greater than that obtained with other commonly used red fluorochromes or by inspection of the reaction product under bright field illumination. Of particular value, the reaction product is unaffected by the denaturing conditions required for the detection of incorporated nuclear BrdU with FITC conjugated anti-BrdU antibody and provides a simple and robust method for the simultaneous detection of cell proliferation and cell surface markers.
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Affiliation(s)
- A Murdoch
- Department of Anatomy, Medical School, University of Birmingham, U.K
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Franchi LL, Murdoch A, Brown WE, Mayne CN, Elliott L, Salmons S. Subcellular localization of newly incorporated myosin in rabbit fast skeletal muscle undergoing stimulation-induced type transformation. J Muscle Res Cell Motil 1990; 11:227-39. [PMID: 2401723 DOI: 10.1007/bf01843576] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Immunogold labelling was used to study the distribution of newly synthesized slow muscle myosin (SM) at the ultrastructural level as it replaced fast muscle myosin (FM) in rabbit muscles undergoing stimulation-induced type transformation. Control fast muscle was labelled strongly with antibody to FM and control slow muscle with antibody to SM; label was confined to the A-band. Well-defined differences in the distribution of label within the A-band suggested that the monoclonal antibodies used corresponded to epitopes on different parts of the myosin molecule; this was confirmed by Western blots of subfragments prepared from FM and SM. After 4 weeks of continuous stimulation at 10 Hz, fibres of the tibialis anterior muscle reacted with antibodies to both isoforms; after 6 weeks, labelling was obtained only with antibody to SM. After a 7-week period of stimulation and 3 further weeks of recovery, fibres again reacted with both antibodies. In all positively-labelled sections, the distribution of gold particles was characteristic of the antibody and independent of the origin or history of the fibres. This observation supports the conclusion that newly synthesized myosin is capable of being incorporated throughout the length and cross-section of the A-band.
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Affiliation(s)
- L L Franchi
- Department of Anatomy, Medical School, University of Birmingham, UK
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Burrell LM, Murdoch A, Angus B, White MC. Autoimmune ovarian failure with elevated serum levels of luteinizing hormone and enlarged ovaries. Case report. Br J Obstet Gynaecol 1990; 97:362-4. [PMID: 2340260 DOI: 10.1111/j.1471-0528.1990.tb01816.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- L M Burrell
- Department of Medicine, Medical School, Newcastle Upon Tyne
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Murdoch A. How valuable is muscle charting? A study of the relationship between neonatal assessment of muscle power and later mobility in children with spina bifida defects. Physiotherapy 1980; 66:221-3. [PMID: 7005919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Murdoch A, Young DG. How much value is muscle charting? A study of the relation between neonatal assessment of muscle power and later mobility in children with spina bifida defects. Z Kinderchir Grenzgeb 1979; 28:387-92. [PMID: 399413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
95 syrviving children with spina bifida were examined between the age of 3 to 8 years and their mobility assessed in relation to the charting of muscle power in the neonatal period. There was no good correlation between these two methods of assessment and the value of repeated muscle charting by the physiotherapists is questioned.
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Murdoch A. Titanium cranioplasty in the repair of skull defects. Nurs Times 1976; 72:1426-9. [PMID: 959008] [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: 12/25/2022]
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Murdoch A. Medical Supervision of Industrial Workers. West J Med 1941. [DOI: 10.1136/bmj.2.4224.889] [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: 11/04/2022]
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Murdoch A. Posture and Painful Feet. West J Med 1938. [DOI: 10.1136/bmj.1.4033.918-b] [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: 11/04/2022]
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Bruce-Porter B, Caldwell JR, Dick JH, Douglas M, Duffett H, Ensor CA, Graham WJ, Gunn AR, Jakins P, Kerr J, Ligat D, McDonagh JER, Macdonald P, McGowan RG, Moss A, Murdoch A, Thorne FJ, Webb H, Winchester AH. "Constructive Conscious Control". BMJ 1937. [DOI: 10.1136/bmj.1.3986.1137-a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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