1
|
Axemaker H, Plesselova S, Calar K, Jorgensen M, Wollman J, de la Puente P. Normal Uterine Fibroblast Are Reprogramed into Ovarian Cancer-Associated Fibroblasts by Ovarian Tumor-derived Conditioned Media. bioRxiv 2023:2023.09.29.560158. [PMID: 37873479 PMCID: PMC10592803 DOI: 10.1101/2023.09.29.560158] [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] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Cancer-associated fibroblasts (CAFs) are key contributors to ovarian cancer (OC) progression and therapeutic resistance through dysregulation of the extracellular matrix (ECM). CAFs are a heterogenous population derived from different cell types through activation and reprogramming. Current studies rely on uncharacterized heterogenous primary CAFs or normal fibroblasts that fail to recapitulate CAF-like tumor behavior. Here, we present a translatable-based approach for the reprogramming of normal uterine fibroblasts into ovarian CAFs using ovarian tumor-derived conditioned media to establish two well-characterized ovarian conditioned CAF lines. Phenotypic and functional characterization demonstrated that the conditioned CAFs expressed a CAF-like phenotype, strengthened proliferation, secretory, contractility, and ECM remodeling properties when compared to resting normal fibroblasts, consistent with an activated fibroblast status. Moreover, conditioned CAFs significantly enhanced drug resistance and tumor progression and resembled a CAF-like subtype associated with worse prognosis. The present study provides a reproducible, cost-effective, and clinically relevant protocol to reprogram normal fibroblasts into CAFs using tumor-derived conditioned media. Using these resources, further development of therapeutics that possess potentiality and specificity towards CAF-mediated chemoresistance in OC are further warranted.
Collapse
|
2
|
Wilson NJ, Barratt M, Jorgensen M, Limbu B, Donley M, Buchholtz M, Smith V, Deb S. Training support workers about the overmedication of people with intellectual disabilities: an Australian pre-post pilot study. J Intellect Disabil Res 2023; 67:519-530. [PMID: 36880447 DOI: 10.1111/jir.13023] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 02/06/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND There is evidence that psychotropic medications are overprescribed and overused to manage behaviours of concern for people with intellectual disabilities. Disability support workers and support staff lack education and training on the administration and safety of psychotropic medication use. This study aimed to test the applicability and preliminary efficacy of SPECTROM, an education programme developed in the UK, in an Australian context. METHODS The training comprises two parts: Module 1 encompasses psychotropic medications, their use and side effects. Module 2 focuses on non-pharmacological interventions for supporting people with behaviours of concern. Thirty-three participants attended the training course and completed pre-training and post-training surveys on the Psychotropic Knowledge Questionnaire and Management of Aggression and Violence Attitude Scale-Revised at four time points: pre-training, 2 weeks, 3 months and 5 months post-training. RESULTS Psychotropic Knowledge Questionnaire scores showed statistically significant post-training improvement at all post-training time points (P < 0.05). Management of Aggression and Violence Attitude Scale-Revised scores were high at pre-training and did not change significantly at any of the post-training survey time points. A 2-week post-training feedback questionnaire reported 80% agreement that the training programme was appropriate, useful and valid. Only 36% of participants completed questionnaires at all time points. CONCLUSIONS SPECTROM training increased staff knowledge of psychotropic medications, yet loss of participants was high. Further refinement of the applicability of the training for the Australian context and evaluation of the feasibility of implementation, clinical and cost-effectiveness of the programme are required.
Collapse
Affiliation(s)
- N J Wilson
- School of Nursing and Midwifery, Western Sydney University, Hawkesbury Campus, Richmond, NSW, Australia
| | - M Barratt
- School of Nursing and Midwifery, Western Sydney University, Hawkesbury Campus, Richmond, NSW, Australia
| | - M Jorgensen
- Practice Quality Division, NDIS Quality and Safeguards Commission, Parramatta, NSW, Australia
- Faculty of Medicine, Health and Human Sciences, Macquarie University, Sydney, NSW, Australia
| | - B Limbu
- Faculty of Medicine, Department of Brain Sciences, Imperial College London, London, UK
| | - M Donley
- Behaviour Intervention and Support, Life Without Barriers, Newcastle, NSW, Australia
| | - M Buchholtz
- Behaviour Intervention and Support, Life Without Barriers, Newcastle, NSW, Australia
| | - V Smith
- Behaviour Intervention and Support, Life Without Barriers, Newcastle, NSW, Australia
| | - S Deb
- Faculty of Medicine, Department of Brain Sciences, Imperial College London, London, UK
| |
Collapse
|
3
|
Bowman R, Walters B, Smith V, Prise KL, Handley SE, Green K, Mankad K, O'Hare P, Dahl C, Jorgensen M, Opocher E, Hargrave D, Thompson DA. Visual outcomes and predictors in optic pathway glioma: a single centre study. Eye (Lond) 2023; 37:1178-1183. [PMID: 35562551 PMCID: PMC10101957 DOI: 10.1038/s41433-022-02096-1] [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: 11/19/2021] [Revised: 03/31/2022] [Accepted: 05/06/2022] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND/AIMS Optic pathway gliomas (OPGs) may cause progressive visual loss despite chemotherapy. Newer, less toxic treatments might be given earlier, depending on visual prognosis. We aimed to investigate the prognostic value of visual evoked potentials (VEP) and optical coherence tomography (OCT). METHODS A retrospective study of OPG patients (treated 2003-2017) was conducted. Primary outcome was PEDIG category visual acuity in better and worse eyes (good < = 0.2, moderate 0.3-0.6 and poor > = 0.7 logMAR). Binary logistic regression analysis was used to identify predictors of these outcomes. RESULTS 60 patients (32 Neurofibromatosis type 1 [NF1] and 28 sporadic) had median presentation age 49 months (range 17-183) (NF1) and 27 months (range 4-92) (sporadic). Median follow up was 82 months (range 12-189 months). At follow up 24/32 (75%) of NF1 children and 14/28 (50%) of sporadic children had good better eye visual acuity and 11/32 (34%) of NF1 children and 15/28 (54%) of sporadics had poor worse eye acuity. Mean peripapillary retinal nerve fibre layer (RNFL) thickness predicted good better eye final acuity (OR 0.799, 95%CI 0.646-0.987, p = 0.038). Presenting with visual symptoms (OR 0.22 95% CI 0.001-0.508, p = 0.017) and poorer VEP scores (OR 2.35 95% CI 1.1-5.03, p = 0.027) predicted poor worse eye final acuity. 16 children had homonymous hemianopias at follow up, predicted by poor presenting binocular VEP score (OR 1.449 95%CI 1.052-1.995, p = 0.02). CONCLUSIONS We found that both RNFL thickness on OCT and VEP were useful in predicting future visual acuity and vision and potentially in planning treatment. We had a high prevalence of homonymous hemianopia.
Collapse
Affiliation(s)
- R Bowman
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England.
- University College London, Great Ormond Street Institute of Child Health, WC1N 1EH, London, England.
| | - B Walters
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - V Smith
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - K L Prise
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - S E Handley
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
- University College London, Great Ormond Street Institute of Child Health, WC1N 1EH, London, England
| | - K Green
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - K Mankad
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
- University College London, Great Ormond Street Institute of Child Health, WC1N 1EH, London, England
| | - P O'Hare
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - C Dahl
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - M Jorgensen
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - E Opocher
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
| | - D Hargrave
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
- University College London, Great Ormond Street Institute of Child Health, WC1N 1EH, London, England
| | - D A Thompson
- Great Ormond Street Hospital, Great Ormond Street NHS Foundation Trust, WC1N 3JH, London, England
- University College London, Great Ormond Street Institute of Child Health, WC1N 1EH, London, England
| |
Collapse
|
4
|
St Clair B, Jorgensen M, Nguyen A, Georgiou A. A Scoping Review of Adverse Incidents Research in Aged Care Homes: Learnings, Gaps, and Challenges. Gerontol Geriatr Med 2022; 8:23337214221144192. [PMID: 36568485 PMCID: PMC9772958 DOI: 10.1177/23337214221144192] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/07/2022] [Accepted: 11/22/2022] [Indexed: 12/24/2022] Open
Abstract
Background: Adverse incidents are well studied within acute care settings, less so within aged care homes. The aim of this scoping review was to define the types of adverse incidents studied in aged care homes and highlight strengths, gaps, and challenges of this research. Methods: An expanded definition of adverse incidents including physical, social, and environmental impacts was used in a scoping review based on the PRISMA Extension for Scoping Reviews Checklist. MEDLINE, CINAHL, and EBSCOhost were searched for English language, peer-reviewed studies conducted in aged care home settings between 2000 and 2020. Forty six articles across 12 countries were identified, charted, and analyzed using descriptive statistics and narrative summary methods. Results: Quantitative studies (n = 42, 91%) dominated adverse incidents literature. The majority of studies focused on physical injuries (n = 29, 63%), with fewer examining personal/interpersonal (15%) and environmental factors (22%). Many studies did not describe the country's aged care system (n = 26, 56%). Only five studies (11%) included residents' voices. Discussion: This review highlights a need for greater focus on resident voices, qualitative research, and interpersonal/environmental perspectives in adverse event research in aged care homes. Addressing these gaps, future research may contribute to better understanding of adverse incidents within this setting.
Collapse
Affiliation(s)
- B. St Clair
- Macquarie University, Sydney, NSW, Australia,B. St Clair, Faculty of Medicine and Health Sciences, Centre for Health Systems and Safety Research, Australian Institute of Health Innovation, Macquarie University, Level 6, 75 Talavera Road, Sydney, NSW 2109, Australia.
| | | | - A. Nguyen
- Macquarie University, Sydney, NSW, Australia,UNSW Sydney, NSW, Australia
| | - A. Georgiou
- Macquarie University, Sydney, NSW, Australia
| |
Collapse
|
5
|
Maggard J, Zarbock T, Jorgensen M. An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report. INT J MORPHOL 2021. [DOI: 10.4067/s0717-95022021000401054] [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: 11/17/2022]
|
6
|
Jorgensen M, Oterhals K, Ponitz V, Morken I. Handheld ultrasound; point-of-care examinations by intensive care nurses in a cardiac intensive care unit. An interrater agreement study. Eur J Cardiovasc Nurs 2021. [DOI: 10.1093/eurjcn/zvab060.091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
Background
Adding point-of-care ultrasound to the physical examination of patients to assess early signs of decompensation and fluid overload has been proven to add information and improve quality of care, also when performed by nurses. Few studies have examined intensive care nurses’ point-of-care ultrasound examinations in acute cardiac settings.
Purpose
To evaluate if the findings of intensive care nurses ultrasound examinations, after brief training, were in agreement with conventional ultrasound examination performed by physicians.
Methods
This comparative cross sectional interrater agreement study included 50 patients admitted with signs and symptoms of dyspnoea and suspected cardiac disease to a cardiac intensive care unit. After brief training, the study nurses performed standardized examinations of the patients’ inferior vena cava (IVC) and the pleural- and pericardial cavities using a handheld ultrasound device. A physician repeated the same examinations using conventional ultrasound, blinded of the nurses’ findings.
Results
Analysis using Gwets agreement coefficient (AC2) with quadratic weights showed moderate agreement for the IVC respiration variation 0.60 (95% CI 0.38-0.82), and substantial agreement for the IVC diameter 0.70 (95% CI 0.50- 0.90) and right-sided pleural effusion 0.70 (95% CI 0.52-0.88). For left-sided pleural effusion 0.85 (95% CI 0.75-0.95) and for pericardial effusion 0.95 (95% CI 0.90-1.01) the agreement was almost perfect.
Conclusion
This study indicates that intensive care nurses, after brief training in point-of- care ultrasound, can perform reliable examinations of the IVC and pleural- and pericardial cavities compared to a physicians conventional ultrasound examination.
Collapse
Affiliation(s)
- M Jorgensen
- Stavanger University Hospital, Department of Cardiology, Stavanger, Norway
| | - K Oterhals
- Haukeland University Hospital, Department of Heart Disease, Bergen, Norway
| | - V Ponitz
- Stavanger University Hospital, Department of Cardiology, Stavanger, Norway
| | - I Morken
- Stavanger University Hospital, Department of Cardiology, Stavanger, Norway
| |
Collapse
|
7
|
Frühwald MC, Nemes K, Boztug H, Cornips MCA, Evans DG, Farah R, Glentis S, Jorgensen M, Katsibardi K, Hirsch S, Jahnukainen K, Kventsel I, Kerl K, Kratz CP, Pajtler KW, Kordes U, Ridola V, Stutz E, Bourdeaut F. Current recommendations for clinical surveillance and genetic testing in rhabdoid tumor predisposition: a report from the SIOPE Host Genome Working Group. Fam Cancer 2021; 20:305-316. [PMID: 33532948 PMCID: PMC8484234 DOI: 10.1007/s10689-021-00229-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 01/06/2021] [Indexed: 12/28/2022]
Abstract
The rhabdoid tumor (RT) predisposition syndromes 1 and 2 (RTPS1 and 2) are rare genetic conditions rendering young children vulnerable to an increased risk of RT, malignant neoplasms affecting the kidney, miscellaneous soft-part tissues, the liver and the central nervous system (Atypical Teratoid Rhabdoid Tumors, ATRT). Both, RTPS1&2 are due to pathogenic variants (PV) in genes encoding constituents of the BAF chromatin remodeling complex, i.e. SMARCB1 (RTPS1) and SMARCA4 (RTPS2). In contrast to other genetic disorders related to PVs in SMARCB1 and SMARCA4 such as Coffin-Siris Syndrome, RTPS1&2 are characterized by a predominance of truncating PVs, terminating transcription thus explaining a specific cancer risk. The penetrance of RTPS1 early in life is high and associated with a poor survival. However, few unaffected carriers may be encountered. Beyond RT, the tumor spectrum may be larger than initially suspected, and cancer surveillance offered to unaffected carriers (siblings or parents) and long-term survivors of RT is still a matter of discussion. RTPS2 exposes female carriers to an ill-defined risk of small cell carcinoma of the ovaries, hypercalcemic type (SCCOHT), which may appear in prepubertal females. RT surveillance protocols for these rare families have not been established. To address unresolved issues in the care of individuals with RTPS and to propose appropriate surveillance guidelines in childhood, the SIOPe Host Genome working group invited pediatric oncologists and geneticists to contribute to an expert meeting. The current manuscript summarizes conclusions of the panel discussion, including consented statements as well as non-evidence-based proposals for validation in the future.
Collapse
Affiliation(s)
- M C Frühwald
- Paediatric and Adolescent Medicine, Swabian Children's Cancer Center, University Medical Center Augsburg, Stenglinstraße 2, 86156, Augsburg, Germany.
| | - K Nemes
- Paediatric and Adolescent Medicine, Swabian Children's Cancer Center, University Medical Center Augsburg, Stenglinstraße 2, 86156, Augsburg, Germany
| | - H Boztug
- St. Anna Children's Hospital and Children's Cancer Research Institute, Department of Pediatrics, Medical University of Vienna, Vienna, Austria
| | - M C A Cornips
- Department of Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - D G Evans
- Manchester Centre for Genomic Medicine, Division of Evolution and Genomic Sciences, MAHSC, St Mary's Hospital, Manchester University Hospitals NHS Foundation Trust, University of Manchester, Manchester, UK
| | - R Farah
- Department of Pediatrics, Division of Hematology/Oncology, LAU Medical Center-Rizk Hospital, Ashrafieh, Beirut, Lebanon
| | - S Glentis
- Pediatric Hematology-Oncology Unit, First Department of Pediatrics, National and Kapodistrian University of Athens, "Aghia Sofia" Children's Hospital, Athens, Greece
| | - M Jorgensen
- Great Ormond Street Hospital for Children, NHS Foundation Trust, London, WC1N 3JH, UK
| | - K Katsibardi
- Pediatric Hematology-Oncology Unit, First Department of Pediatrics, National and Kapodistrian University of Athens, "Aghia Sofia" Children's Hospital, Athens, Greece
| | - S Hirsch
- Institute of Human Genetics, Heidelberg University Hospital, Heidelberg, Germany.,Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany
| | - K Jahnukainen
- Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - I Kventsel
- Department of Pediatric Hematology-Oncology, The Edmond and Lily Safra Children's Hospital, Chaim Sheba Medical Center, 52621, Tel-Hashomer, Israel
| | - K Kerl
- Department of Pediatric Hematology and Oncology, University Children's Hospital Münster, Albert-Schweitzer-Campus 1, 48149, Münster, Germany
| | - C P Kratz
- Pediatric Hematology and Oncology, Hannover Medical School, Hannover, Germany
| | - K W Pajtler
- Hopp Children's Cancer Center Heidelberg (KiTZ), Heidelberg, Germany.,Children's Hospital, University of Helsinki and Helsinki University Hospital, Helsinki, Finland.,Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ) and German Cancer Consortium (DKTK), Heidelberg, Germany.,Department of Pediatric Oncology, Hematology, and Immunology, University Hospital Heidelberg, Heidelberg, Germany
| | - U Kordes
- Department of Pediatric Hematology and Oncology, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - V Ridola
- Department of Pediatric Oncology and Haematology, Mitera Children's Hospital, Athens, Greece
| | - E Stutz
- Department of Oncology, University Children's Hospital, Zurich, Switzerland
| | - F Bourdeaut
- Institut Curie, SIREDO Pediatric Cancer Center, INSERM U830, Laboratory of Translational Research in Pediatric Oncology, Paris Sciences Lettres Research University, Paris, France.
| |
Collapse
|
8
|
Calar K, Plesselova S, Bhattacharya S, Jorgensen M, de la Puente P. Human Plasma-Derived 3D Cultures Model Breast Cancer Treatment Responses and Predict Clinically Effective Drug Treatment Concentrations. Cancers (Basel) 2020; 12:cancers12071722. [PMID: 32610529 PMCID: PMC7407241 DOI: 10.3390/cancers12071722] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 06/19/2020] [Accepted: 06/23/2020] [Indexed: 02/08/2023] Open
Abstract
Lack of efficacy and a low overall success rate of phase I-II clinical trials are the most common failures when it comes to advancing cancer treatment. Current drug sensitivity screenings present several challenges including differences in cell growth rates, the inconsistent use of drug metrics, and the lack of translatability. Here, we present a patient-derived 3D culture model to overcome these limitations in breast cancer (BCa). The human plasma-derived 3D culture model (HuP3D) utilizes patient plasma as the matrix, where BCa cell lines and primary BCa biopsies were grown and screened for drug treatments. Several drug metrics were evaluated from relative cell count and growth rate curves. Correlations between HuP3D metrics, established preclinical models, and clinical effective concentrations in patients were determined. HuP3D efficiently supported the growth and expansion of BCa cell lines and primary breast cancer tumors as both organoids and single cells. Significant and strong correlations between clinical effective concentrations in patients were found for eight out of ten metrics for HuP3D, while a very poor positive correlation and a moderate correlation was found for 2D models and other 3D models, respectively. HuP3D is a feasible and efficacious platform for supporting the growth and expansion of BCa, allowing high-throughput drug screening and predicting clinically effective therapies better than current preclinical models.
Collapse
Affiliation(s)
- Kristin Calar
- Cancer Biology and Immunotherapies Group, Sanford Research, Sioux Falls, SD 57104, USA; (K.C.); (S.B.); (M.J.)
| | - Simona Plesselova
- Biochemistry and Molecular Biology II, University of Granada, 18071 Granada, Spain;
| | - Somshuvra Bhattacharya
- Cancer Biology and Immunotherapies Group, Sanford Research, Sioux Falls, SD 57104, USA; (K.C.); (S.B.); (M.J.)
| | - Megan Jorgensen
- Cancer Biology and Immunotherapies Group, Sanford Research, Sioux Falls, SD 57104, USA; (K.C.); (S.B.); (M.J.)
- MD/PhD Program, University of South Dakota Sanford School of Medicine, Sioux Falls, SD 57105, USA
| | - Pilar de la Puente
- Cancer Biology and Immunotherapies Group, Sanford Research, Sioux Falls, SD 57104, USA; (K.C.); (S.B.); (M.J.)
- Department of Surgery, University of South Dakota Sanford School of Medicine, Sioux Falls, SD 57105, USA
- Flow Cytometry Core, Sanford Research, Sioux Falls, SD 57104, USA
- Correspondence: ; Tel.: +1-605-312-6042
| |
Collapse
|
9
|
Messer JG, Castillo EJ, Abraham AM, Jiron JM, Israel R, Yarrow JF, Thomas S, Reynolds MC, Wnek RD, Jorgensen M, Wanionok N, Van Poznak C, Bhattacharyya I, Kimmel DB, Aguirre JI. Anti-vascular endothelial growth factor antibody monotherapy causes destructive advanced periodontitis in rice rats (Oryzomys palustris). Bone 2020; 130:115141. [PMID: 31707108 PMCID: PMC6941430 DOI: 10.1016/j.bone.2019.115141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 10/15/2019] [Accepted: 11/04/2019] [Indexed: 12/24/2022]
Abstract
OBJECTIVE Angiogenesis inhibitors (AgI) are commonly used in combination chemotherapy protocols to treat cancer, and have been linked to osteonecrosis of the jaw (ONJ). However, it is unknown if AgI therapy alone is sufficient to induce ONJ. We have previously established an ONJ model in rice rats with localized periodontitis that receive zoledronic acid (ZOL). The purpose of this study was to use this model to determine the role of anti-vascular endothelial growth factor A (anti-VEGF) antibody treatment of rice rats with localized maxillary periodontitis. We hypothesized that rice rats with localized maxillary periodontitis given anti-VEGF monotherapy will develop oral lesions that resemble ONJ, defined by exposed, necrotic alveolar bone. METHODS At age 4 weeks, 45 male rice rats were randomized into three groups (n = 15): 1) VEH (saline), 2) ZOL (80 μg/kg body weight, intravenously once monthly), and 3) anti-VEGF (5 mg B20-4.1.1/kg body weight, subcutaneously twice weekly). After 24 weeks, rats were euthanized, jaws were excised and a high-resolution photograph of each quadrant was taken to assign a severity grade based on gross appearance. Jaws were then fixed, scanned by MicroCT, decalcified and sectioned for histopathologic and immunohistochemical analyses. RESULTS 40-80% of the rats in the three groups developed gross oral lesions. 50% of ZOL rats developed ONJ. In contrast, 80% of the anti-VEGF rats developed destructive advanced periodontitis that was characterized by extreme alveolar bone loss and fibrosis. Anti-VEGF rats never developed exposed, necrotic bone. Furthermore, only anti-VEGF rats developed mild to severe mandibular periodontitis. Compared to VEH rats, more T-cells were found in periodontal lesions of anti-VEGF rats and more cells of the monocyte lineage were found in ONJ lesions of ZOL rats. CONCLUSIONS Anti-VEGF monotherapy administered to a validated rodent model of ONJ caused a destructive advanced form of periodontitis that differed significantly from ONJ.
Collapse
Affiliation(s)
- J G Messer
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| | - E J Castillo
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| | - A M Abraham
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| | - J M Jiron
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| | - R Israel
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| | - J F Yarrow
- Research Service, VA Medical Center, Gainesville, FL, United States of America; Division of Endocrinology, Diabetes, and Metabolism, University of Florida College of Medicine, Gainesville, FL, United States of America.
| | - S Thomas
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| | - M C Reynolds
- Research Service, VA Medical Center, Gainesville, FL, United States of America
| | - R D Wnek
- Research Service, VA Medical Center, Gainesville, FL, United States of America
| | - M Jorgensen
- Department of Pediatrics, College of Medicine, UF, United States of America.
| | - N Wanionok
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America
| | - C Van Poznak
- University of Michigan, Ann Arbor, MI, United States of America.
| | - I Bhattacharyya
- Department of Oral & Maxillofacial Diagnostic Sciences, College of Dentistry, UF, United States of America.
| | - D B Kimmel
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| | - J I Aguirre
- Department of Physiological Sciences, University of Florida (UF), Gainesville, FL, United States of America.
| |
Collapse
|
10
|
Fichten C, Rizzo D, Bailes S, Creti L, Jorgensen M, Libman E. Is adherence to PAP treatment for apnea associated with improved insomnia-related symptoms? Sleep Med 2019. [DOI: 10.1016/j.sleep.2019.11.314] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
11
|
O’Neill S, Radia J, Bird K, Rathleff MS, Bandholm T, Jorgensen M, Thorborg K. Acute sensory and motor response to 45-s heavy isometric holds for the plantar flexors in patients with Achilles tendinopathy. Knee Surg Sports Traumatol Arthrosc 2019; 27:2765-2773. [PMID: 29974171 PMCID: PMC6706360 DOI: 10.1007/s00167-018-5050-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 06/28/2018] [Indexed: 12/11/2022]
Abstract
PURPOSE The purpose of this study was to explore the immediate effects of heavy isometric plantar flexor exercise on sensory output (pain during a functional task and mechanical pain sensitivity) and motor output (plantar flexor torque) in individuals with Achilles tendinopathy. METHODS Sixteen subjects with Achilles tendinopathy participated in the study, mean (SD) age 48.6 (8.9) years and Victorian institute assessment-Achilles (VISA-A) score 61.3 (23.0). Sensory testing assessing pain during a functional task, mechanical pain sensitivity and motor output, and plantar flexor peak torque was completed prior to the intervention. All subjects completed a 45-s heavy isometric plantar flexor contraction and were then re-tested using the same sensory and motor tests. Motor output was assessed using isokinetic dynamometry at speeds previously identified as of interest in subjects with Achilles tendinopathy. RESULTS Only 9 of the 16 subjects experienced pain during a functional task, self-reported pain was 4.2 (1.9) numerical rating scale (NRS) pre-intervention and 4.9 (3.2) NRS postintervention (n.s.). Mechanical pressure sensitivity was 446.5 (± 248.5) g/mm2 pre-intervention and 411.8 (± 211.8) g/mm2 post-intervention (n.s.). Mean concentric plantar flexor torque at 90 and 225°/s was 47.1 (14.5) and 33.6 (11.6) Nm, respectively, pre-intervention and 53.0 (18.5) and 33.4 (6.6) Nm post-intervention (p = 0.039 and n.s.). Eccentric torque at 90°/s was 98.5 (34.2) Nm preintervention versus 106.0 (41.4) Nm post-intervention (n.s.). CONCLUSION In this exploratory study, patients with Achilles tendinopathy had a varied sensory and motor output response to heavy isometric contractions. Using the recommended approach of heavy 45-s isometric contractions did not offer a meaningful acute benefit for sensory or motor output for subjects with Achilles tendinopathy. Based on this study, heavy 45-s isometric contractions cannot be recommended for immediate pain relief or improved motor output for patients with Achilles tendinopathy. LEVEL OF EVIDENCE IV, prospective cohort study.
Collapse
Affiliation(s)
- S. O’Neill
- 0000 0004 1936 8411grid.9918.9School of Allied Health, University of Leicester, Leicester, UK
| | - J. Radia
- 0000 0004 1936 8411grid.9918.9School of Allied Health, University of Leicester, Leicester, UK
| | - K. Bird
- 0000 0004 1936 8411grid.9918.9School of Allied Health, University of Leicester, Leicester, UK
| | - M. S. Rathleff
- 0000 0001 0742 471Xgrid.5117.2Research Unit for General Practice in Aalborg, Department of Clinical Medicine, Aalborg University, Aalborg, Denmark ,0000 0001 0742 471Xgrid.5117.2Department of Occupational Therapy and Physiotherapy, Aalborg University Hospital, Aalborg University, Aalborg, Denmark
| | - T. Bandholm
- 0000 0001 0674 042Xgrid.5254.6Physical Medicine and Rehabilitation Research-Copenhagen (PMR-C), Department of Physical and Occupational Therapy, Clinical Research Center, Amager-Hvidovre Hospital, University of Copenhagen, Copenhagen, Denmark ,0000 0001 0674 042Xgrid.5254.6Department of Orthopedic Surgery, Clinical Research Center, Amager-Hvidovre Hospital, University of Copenhagen, Copenhagen, Denmark
| | - M. Jorgensen
- 0000 0004 0646 7349grid.27530.33Department of Geriatrics, Aalborg University Hospital, Aalborg, Denmark
| | - K. Thorborg
- 0000 0004 0646 8202grid.411905.8Sport Orthopedic Research Center-Copenhagen (SORC-C), Amager-Hvidovre University Hospital, Copenhagen, Denmark
| |
Collapse
|
12
|
Fichten C, Tran D, Rizzo D, Bailes S, Jorgensen M, Creti L, Conrod K, Grad R, Baltzan M, Pavilanis A, Harvison M, Libman E. 0365 Insomnia Subtypes Before And After Cpap Treatment Of Sleep Apnea. Sleep 2018. [DOI: 10.1093/sleep/zsy061.364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- C Fichten
- Jewish General Hospital, Montreal, QC, CANADA
| | - D Tran
- Jewish General Hospital, Montreal, QC, CANADA
| | - D Rizzo
- Jewish General Hospital, Montréal, QC, CANADA
| | - S Bailes
- Jewish General Hospital, Montreal, QC, CANADA
| | | | - L Creti
- Jewish General Hospital, Montreal, QC, CANADA
| | - K Conrod
- Jewish General Hospital, Montreal, QC, CANADA
| | - R Grad
- Jewish General Hospital, Montreal, QC, CANADA
| | - M Baltzan
- Mount-Sinai Hospital, Montreal, QC, CANADA
| | | | | | - E Libman
- Jewish General Hospital, Montreal, QC, CANADA
- Jewish General Hospital, Montreal, QC, CANADA
| |
Collapse
|
13
|
Rathleff CR, Bandholm T, Spaich EG, Jorgensen M, Andreasen J. Unsupervised progressive elastic band exercises for frail geriatric inpatients objectively monitored by new exercise-integrated technology-a feasibility trial with an embedded qualitative study. Pilot Feasibility Stud 2017; 3:56. [PMID: 29158914 PMCID: PMC5683376 DOI: 10.1186/s40814-017-0202-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 10/30/2017] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Frailty is a serious condition frequently present in geriatric inpatients that potentially causes serious adverse events. Strength training is acknowledged as a means of preventing or delaying frailty and loss of function in these patients. However, limited hospital resources challenge the amount of supervised training, and unsupervised training could possibly supplement supervised training thereby increasing the total exercise dose during admission. A new valid and reliable technology, the BandCizer, objectively measures the exact training dosage performed. The purpose was to investigate feasibility and acceptability of an unsupervised progressive strength training intervention monitored by BandCizer for frail geriatric inpatients. METHODS This feasibility trial included 15 frail inpatients at a geriatric ward. At hospitalization, the patients were prescribed two elastic band exercises to be performed unsupervised once daily. A BandCizer Datalogger enabling measurement of the number of sets, repetitions, and time-under-tension was attached to the elastic band. The patients were instructed in performing strength training: 3 sets of 10 repetitions (10-12 repetition maximum (RM)) with a separation of 2-min pauses and a time-under-tension of 8 s. The feasibility criterion for the unsupervised progressive exercises was that 33% of the recommended number of sets would be performed by at least 30% of patients. In addition, patients and staff were interviewed about their experiences with the intervention. RESULTS Four (27%) out of 15 patients completed 33% of the recommended number of sets. For the total sample, the average percent of performed sets was 23% and for those who actually trained (n = 12) 26%. Patients and staff expressed a general positive attitude towards the unsupervised training as an addition to the supervised training sessions. However, barriers were also described-especially constant interruptions. CONCLUSIONS Based on the predefined criterion for feasibility, the unsupervised training was not feasible, although the criterion was almost met. The patients and staff mainly expressed positive attitudes towards the unsupervised training. As even a small training dosage has been shown to improve the physical performance of geriatric inpatients, the proposed intervention might be relevant if the interruptions are decreased in future large-scale trials and if the adherence is increased. TRIAL REGISTRATION ClinicalTrials.gov: NCT02702557, February 29, 2016. Data Protection Agency: 2016-42, February 25, 2016. Ethics Committee: No registration needed, December 8, 2015 (e-mail correspondence).
Collapse
Affiliation(s)
- C. R. Rathleff
- Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7-D3, 9220 Aalborg, Denmark
- Department of Physiotherapy and Occupational Therapy, Aalborg University Hospital, Hobrovej 18-22, 9000 Aalborg, Denmark
| | - T. Bandholm
- Physical Medicine & Rehabilitation Research - Copenhagen (PMR-C), Department of Physical and Occupational Therapy, Department of Orthopedic Surgery, Clinical Research Center, Amager-Hvidovre Hospital, University of Copenhagen, Copenhagen, Denmark
| | - E. G. Spaich
- Department of Health Science and Technology, Aalborg University, Fredrik Bajers Vej 7-D3, 9220 Aalborg, Denmark
| | - M. Jorgensen
- Center for PREdiction and prevention of FALLs (PREFALL) Department of Geriatrics, Aalborg University Hospital, Hobrovej 18-22, Aalborg, Denmark
| | - J. Andreasen
- Department of Physiotherapy and Occupational Therapy, Aalborg University Hospital, Hobrovej 18-22, 9000 Aalborg, Denmark
| |
Collapse
|
14
|
Scheerer MF, Kosiborod M, Cavender M, Fu A, Wilding J, Norhammar A, Birkeland K, Jorgensen M, Thuresson M, Arya N, Bodegard J, Hammar N, Holl RW, Fenici P. Positive Einflüsse auf die Hospitalisierung für Herzinsuffizienz (HHI) und Gesamtmortalität bei Neueinstellung auf SGLT-2 Inhibitoren im Vergleich zu anderen Antidiabetika: Gesamtergebnisse von mehr als 300.000 Patienten aus dem klinischen Alltag – CVD-REAL Studie. DIABETOL STOFFWECHS 2017. [DOI: 10.1055/s-0037-1603544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- MF Scheerer
- AstraZeneca GmbH, Medical Affairs, Wedel, Germany
| | - M Kosiborod
- Saint Luke's Mid America Heart Institute and University of Missouri-Kansas City, Kansas City, United States
| | - M Cavender
- University of North Carolina, Chapel Hill, United States
| | - A Fu
- Georgetown University Medical Center, Washington, United States
| | - J Wilding
- University of Liverpool, Liverpool, United Kingdom
| | | | | | - M Jorgensen
- Steno Diabetes Center, Copenhagen, Denmark
- National Institute of Public Health, Southern Denmark University, Copenhagen, Denmark
| | | | - N Arya
- AstraZeneca, Gaithersburg, United States
| | | | - N Hammar
- AstraZeneca Gothenburg, Mölndal, Sweden
| | - RW Holl
- University of Ulm, Ulm, Germany
| | - P Fenici
- AstraZeneca, Cambridge, United Kingdom
| |
Collapse
|
15
|
Elvin JA, Gay L, Colon-Otero G, Jorgensen M, Havrilesky L, Zajchowski D, Shawver L, Valea FA, Aithal S, Ross JS, Markman M, Gaillard S. Abstract MIP-056: CONSTITUTIVELY ACTIVE ESTROGEN RECEPTOR–ALPHA LIGAND BINDING DOMAIN (ERA–LBD) MUTATIONS IN OVARIAN CARCINOMA. Clin Cancer Res 2017. [DOI: 10.1158/1557-3265.ovcasymp16-mip-056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
OBJECTIVES: Mutations in ESR1 that are acquired following treatment with aromatase inhibitors commonly underlie resistance to endocrine therapy in breast cancer. ERa-LBD mutations, especially at ESR1 Y537 and D538, confer constitutive activity and partial resistance to selective estrogen receptor modulators (SERMs), such as tamoxifen, and degraders (SERDs) such as fulvestrant in transcription assays. Some ovarian tumors also respond to anti-hormone therapy, and a subset which initially respond subsequently become resistant. The mechanisms of resistance to hormone therapy in ovarian cancer have not been previously described. Comprehensive genomic profiling (CGP) of ovarian tumors was used to analyze ESR1 and correlate responsiveness to aromatase inhibitors in a subset of these patients.
METHODS: DNA was extracted from tumor specimens and sequenced using hybridization-capture (FoundationOne) targeting up to 315 genes, plus select introns frequently rearranged in cancer. Demographic and clinicopathologic data will be presented for a subset of patients whose tumors harbor ERa-LBD mutations associated with activation and resistance..
RESULTS: CGP of 3,641 ovarian and peritoneal carcinomas revealed 31 (0.9%) samples with amplification of ESR1 and 16 (0.4%) samples with acquired or de novo mutations affecting the ERa-LBD: Y537S (10), Y537N (1), D638G (4), and S341L (1). Within the 16 samples, ovarian serous carcinoma (10), ovarian endometrioid adenocarcinoma (3), ovarian epithelial carcinoma NOS (2), and peritoneal serous carcinoma (1) were represented. In cases of acquired mutations following prior hormone therapy, there was evidence of clinical benefit to SERM/SERDs.
CaseAgeDiseaseESR1 MutationPrior HRTAcquiredSERM/SERD (*post mut if acquired)Clinical Benefit SERM/SERD159Ov serousY537SYYNN/A258Papillary serousY537NNNYY344Endometrioid ov adenoY537SNNYY445HG ov serousD538GNUYU564Endometrioid ov adenoY537SYUNU646LG ov serousY537SYUYU739Papillary serousY537SYUNN/A827LG ov serousY537SYYYY
CONCLUSIONS: Acquired activating mutations in ESR1, previously described in breast cancer, can occur in ovarian serous carcinomas and endometrioid carcinomas initially responsive to hormone therapy and suggest a similar mechanism for acquired aromatase inhibitor resistance. However, ERa mutations can occur in gynecologic malignancies even in the absence of prior endocrine therapy. Tumors harboring these mutations may remain responsive to SERM/SERDs.
Citation Format: J. A. Elvin, L. Gay, G. Colon-Otero, M. Jorgensen, L. Havrilesky, D. Zajchowski, L Shawver, F. A. Valea, S Aithal, J. S. Ross, M. Markman, S. Gaillard. CONSTITUTIVELY ACTIVE ESTROGEN RECEPTOR–ALPHA LIGAND BINDING DOMAIN (ERA–LBD) MUTATIONS IN OVARIAN CARCINOMA [abstract]. In: Proceedings of the 11th Biennial Ovarian Cancer Research Symposium; Sep 12-13, 2016; Seattle, WA. Philadelphia (PA): AACR; Clin Cancer Res 2017;23(11 Suppl):Abstract nr MIP-056.
Collapse
Affiliation(s)
| | - L. Gay
- 1Foundation Medicine, Inc., Cambridge, MA,
| | | | | | | | | | - L Shawver
- 4Clearity Foundation, San Francisco, CA,
| | - F. A. Valea
- 3Duke University Medical Center, Durham, NC,
| | - S Aithal
- 5Cancer Treatment Centers of America Eastern Regional Medical Center, Philadelphia, PA
| | - J. S. Ross
- 1Foundation Medicine, Inc., Cambridge, MA,
| | - M. Markman
- 5Cancer Treatment Centers of America Eastern Regional Medical Center, Philadelphia, PA
| | - S. Gaillard
- 3Duke University Medical Center, Durham, NC,
| |
Collapse
|
16
|
|
17
|
Libman E, Fichten C, Jorgensen M, Tran D, Conrod K, Creti L. What determines perceived sleep quality in people with and without insomnia? Sleep Med 2015. [DOI: 10.1016/j.sleep.2015.02.1524] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
18
|
Jorgensen M. Author's reply: Assessment of abdominoperineal resection rate as a surrogate marker of hospital quality in rectal cancer surgery (Br J Surg 2013; 100: 1655-1663). Br J Surg 2014; 101:736. [PMID: 24723026 DOI: 10.1002/bjs.9506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- M Jorgensen
- Cancer Epidemiology and Services Research, Sydney School of Public Health, University of Sydney, Sydney, New South Wales, 2006, Australia.
| |
Collapse
|
19
|
Orn S, Melberg T, Jorgensen M, Solli T, Edland UM, Lie BT, Naerland M, Dickstein K. Early discharge (<3 days) following primary PCI is safe in low risk patients. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht308.p1324] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
20
|
Aguirre JI, Akhter MP, Kimmel DB, Pingel J, Xia X, Williams A, Jorgensen M, Edmonds K, Lee JY, Reinhard MK, Battles AH, Kesavalu L, Wronski TJ. Enhanced alveolar bone loss in a model of non-invasive periodontitis in rice rats. Oral Dis 2012; 18:459-68. [PMID: 22233442 DOI: 10.1111/j.1601-0825.2011.01893.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The rice rat (Oryzomys palustris) develops periodontitis-like lesions when fed a diet rich in sucrose and casein (H-SC). We aimed to establish whether this model can accurately mimic the development of human periodontitis. MATERIALS AND METHODS For this purpose, 28-day-old rice rats (15/group) were assigned to standard (STD) or H-SC diets and sacrificed after 6, 12, and 18 weeks. Jaws were processed for morphometric, histometric, histologic, histomorphometric, and micro-CT analyses. RESULTS We found a progressive increase in horizontal alveolar bone loss (ABL) with age in maxillae of rats fed the STD diet as determined by morphometry. The H-SC diet exacerbated horizontal ABL at the palatal surface at 12 and 18 weeks. Furthermore, increased vertical ABL was detected in mandibles and maxillae of rats fed the H-SC diet for 12 and/or 18 weeks by histometry and micro-CT. Remarkably, the H-SC diet significantly increased bone remodeling at the interproximal alveolar bone of mandibles from rats fed for 6 weeks, but not in those fed for longer periods. CONCLUSIONS These findings indicate that the H-SC diet induced a transient increase in alveolar bone remodeling, which is followed by ABL characteristic of moderate periodontitis.
Collapse
Affiliation(s)
- J I Aguirre
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32610, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Rayson D, Urquhart R, Grunfeld E, Cox M, Kendell C, Jorgensen M, Colwell B, Porter GA. Clinical practice guidelines (CPGs) for adjuvant chemotherapy (aCT) in colorectal cancer: A population-based analysis of adherence and non-receipt. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.6064] [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: 11/20/2022] Open
|
22
|
Zuma K, Lurie M, Jorgensen M. Analysis of interval-censored data from circular migrant and non-migrant sexual partnerships using the EM algorithm. Stat Med 2007; 26:309-19. [PMID: 16538697 DOI: 10.1002/sim.2539] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/06/2022]
Abstract
In epidemiological studies where subjects are seen periodically on follow-up visits, interval-censored data occur naturally. The exact time the change of state (such as HIV seroconversion) occurs is not known exactly, only that it occurred sometime within a specific time interval. Methods of estimation for interval-censored data are readily available when data are independent. However, methods for correlated interval-censored data are not well developed. This paper considers an approach for estimating the parameters when data are interval-censored and correlated within sexual partnerships. We consider the exact event times for interval-censored observations as unobserved data, only known to be between two time points. Dependency induced by sexual partnerships is modelled as frailties assuming a gamma distribution for frailties and an exponential distribution on the time to infection. This formulation facilitates application of the expectation-maximization (EM) algorithm. Maximization process maximizes the standard survival frailty model. Results show high degree of heterogeneity between sexual partnerships. Intervention strategies aimed at combating the spread of HIV and other sexually transmitted infections (STI)s should treat sexual partnerships as social units and fully incorporate the effects of migration in their strategies.
Collapse
Affiliation(s)
- K Zuma
- Human Sciences Research Council, PRETORIA, South Africa.
| | | | | |
Collapse
|
23
|
Abstract
It has been hypothesized that recent adverse trends in humans are linked to an increased exposure to potential endocrine disrupting agents. These include widely used compounds that mimic the action of sex hormones, including bisphenol A, phthalates and parabens. Since the chemical structure is not sufficient to determine whether a chemical will act as an oestrogen, there is a need for assays that can determine whether a compound interferes with the endocrine systems. The Environmental Protection Agency has recently suggested a testing scheme, composed of an initial screening followed by a more comprehensive investigation of chemicals that are positive in the screening. The screening will use several short-term assays to screen many thousands of compounds for potential endocrine disrupting properties. However, none of these tests determines compound-induced effects on the expression of endogenous genes, which is the cause of the adverse effects. We propose to use a precise quantification of the expression levels of endogenous oestrogen-regulated genes to test whether a chemical has oestrogenic properties, and describe how an endogenous gene expression assay can be established and conducted. Furthermore, different applications of such an assay are discussed: in cell cultures; in experimental animals; or, optimally, directly in blood samples from exposed humans.
Collapse
Affiliation(s)
- T J Kledal
- Department of Growth and Reproduction, Rigshospitalet, Copenhagen, Denmark
| | | | | | | | | |
Collapse
|
24
|
|
25
|
Petersen K, Jorgensen M, Vinberg N, Gram J, Skouby S, Tonnesen K, Jespersen J. Decreased synthesis of tissue plasminogen activator antigen in users of oral contraceptives. Int J Gynaecol Obstet 2000. [DOI: 10.1016/s0020-7292(00)85157-7] [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: 10/26/2022]
|
26
|
Fuller L, Lu C, McMahon D, Alaudin E, Jorgensen M, Rau S, Sisken J, Jackson B. Effect of dexamethasone on voltage-gated Ca2+ channels and cytosolic Ca2+ in rat chromaffin cells. Neuroreport 1997; 8:1169-72. [PMID: 9175107 DOI: 10.1097/00001756-199703240-00022] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 02/04/2023]
Abstract
The present study examined whether the synthetic glucocorticoid dexamethasone (DEX) can modulate voltage-gated Ca2+ channel (VGCC) activity, and as a consequence agonist-induced increases in cytosolic Ca2+, in cultured rat adrenal medullary chromaffin (RAMC) cells. Exposure to 1 microM DEX for 48 h significantly increased peak VGCC current (delta +140%). DEX treatment also significantly potentiated the increases in cytosolic Ca2+ in response to submaximal stimulatory concentrations of KCl (delta +64%) and nicotine (delta +32%). The Ca2+ channel agonist BAY K-8644 increased both VGCC current (delta +109%) and potentiated the KCl-stimulated increase in cytosolic Ca2+ (delta +35%) to a comparable extent to that seen with DEX. These data suggest that DEX treatment increases VGCC activity, and that this increased Ca2+ influx leads to potentiation of agonist-induced increases in cytosolic Ca2+ in RAMC cells.
Collapse
Affiliation(s)
- L Fuller
- Department of Physiology, University of Kentucky, College of Medicine, Lexington 40536-0084, USA
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
A total of 121 Escherichia coli strains isolated from 3-week-old mink kits were serotyped and examined for virulence factors. 56 strains were isolated from healthy kits while 65 were from "sticky kits". Among these, 34 different serotypes were detected. No difference in serotypes or the presence of virulence factors could be detected between healthy and diseased kits. By electron microscopy of faecal samples corona-, rota-, and calicivirus were demonstrated among healthy as well as diseased kits.
Collapse
|
28
|
Jorgensen M, Daskalopoulos G, Warburton V, Mitchell HM, Hazell SL. Multiple strain colonization and metronidazole resistance in Helicobacter pylori-infected patients: identification from sequential and multiple biopsy specimens. J Infect Dis 1996; 174:631-5. [PMID: 8769626 DOI: 10.1093/infdis/174.3.631] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.6] [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: 02/02/2023] Open
Abstract
Helicobacter pylori strain diversity was investigated in infected persons by collection of multiple biopsies before and after therapy failure. It was demonstrated by random amplification of polymorphic DNA polymerase chain reaction that patients may be infected with a mixed population of H. pylori strains. Most patients were colonized with a predominant strain accompanied by up to 5 variant strains. The use of antimicrobials resulted in an altered distribution of the strains present, but the predominant strain usually remained. Patients may be infected with a mixed population of metronidazole-sensitive and -resistant strains at one time, with metronidazole-based therapy selectively enriching for a resistant population.
Collapse
Affiliation(s)
- M Jorgensen
- School of Microbiology and Immunology, University of New South Wales, Sydney, Australia
| | | | | | | | | |
Collapse
|
29
|
Yalkut D, Lee LY, Grider J, Jorgensen M, Jackson B, Ott C. Mechanism of atrial natriuretic peptide release with increased inspiratory resistance. J Lab Clin Med 1996; 128:322-8. [PMID: 8783640 DOI: 10.1016/s0022-2143(96)90034-7] [Citation(s) in RCA: 43] [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] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Elevated plasma atrial natriuretic peptide (ANP) levels and concomitant increases in renal sodium and water excretion are often encountered in respiratory diseases associated with increased airway resistance such as obstructive sleep apnea. The present study utilized an anesthetized rat model to determine the principal mechanism(s) responsible for stimulation of ANP release in this clinical syndrome. A 10-minute increase in external resistive loading, which reduced peak tracheal pressure to -15 to -17 mm Hg produced a significant increase in both central venous pressure and right atrial transmural pressure. This maneuver subsequently resulted in significant transient increases in glomerular filtration rate; urine flow; urinary Na+, K+, and Cl- excretion; and urinary cyclic guanosine monophosphate (cGMP) excretion, which was taken as an index of increased circulating levels of ANP. Similar changes in renal function and cGMP excretion occurred when arterial PO2 was lowered to a degree equivalent to that seen with increased resistive loading. Lowering arterial PO2 also significantly increased mean central venous pressure and right atrial transmural pressure. Conversely, the resistive loading-induced changes in renal function and cGMP excretion did not occur when the reduction in arterial PO2 was prevented by breathing a high O2 gas mixture during the resistive loading. Additionally, O2 supplementation prevented the increases in both mean central venous pressure and right atrial transmural pressure caused by increased resistive loading. These data indicate that the elevated ANP release that results from an acute increase in external resistive loading is not caused by a decrease in intrathoracic pressure but rather suggest that the elevated ANP release is primarily caused by an increased right atrial transmural pressure resulting from hypoxia-induced pulmonary vasoconstriction.
Collapse
Affiliation(s)
- D Yalkut
- Department of Physiology, University of Kentucky College of Medicine, Lexington 40536-0084, USA
| | | | | | | | | | | |
Collapse
|
30
|
|
31
|
Jorgensen M, Givney R, Pegler M, Vickery A, Funnell G. Typing multidrug-resistant Staphylococcus aureus: conflicting epidemiological data produced by genotypic and phenotypic methods clarified by phylogenetic analysis. J Clin Microbiol 1996; 34:398-403. [PMID: 8789023 PMCID: PMC228805 DOI: 10.1128/jcm.34.2.398-403.1996] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [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: 02/02/2023] Open
Abstract
An outbreak of an unusual tetracycline-sensitive, rifampicin- and ciprofloxacin-resistant, methicillin-resistant Staphylococcus aureus (MRSA) strain at a large teaching hospital was investigated. Two typing methods, phage typing and restriction fragment length polymorphism (RFLP) by pulsed-field gel electrophoresis (RFLP-PFGE), gave conflicting results which were clarified by phylogenetic analysis. Phage typing identified all the "epidemic-associated" strains as identical, while RFLP-PFGE further divided these strains into four pulsotypes. Phylogenetic analysis showed these four pulsotypes were related genetically and also recognized a second strain of MRSA causing a continuing cross-infection problem. Variation in the RFLP-PFGE pattern was shown to occur following lysogenization of phage-sensitive MRSA. These results indicate that in analyzing outbreaks caused by subgroups of clonal organisms like MRSA, it is necessary to use at least two typing methods and that conflicts between these could be resolved by phylogenetic analysis.
Collapse
Affiliation(s)
- M Jorgensen
- Department of Infectious Diseases, University of Sydney, Australia
| | | | | | | | | |
Collapse
|
32
|
Barthel E, Kriza G, Quirion G, Wzietek P, Jérome D, Christensen JB, Jorgensen M, Bechgaard K. Conduction noise and motional narrowing of the nuclear magnetic resonance line in sliding spin-density waves. Phys Rev Lett 1993; 71:2825-2828. [PMID: 10054785 DOI: 10.1103/physrevlett.71.2825] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
|
33
|
Ellitsgaard N, Andersson AP, Jensen KV, Jorgensen M. Changes in C-reactive protein and erythrocyte sedimentation rate after hip fractures. Int Orthop 1991; 15:311-4. [PMID: 1809709 DOI: 10.1007/bf00186867] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Serial measurements of C-reactive protein (CRP) levels and erythrocyte sedimentation rates (ESR) were performed during the week after operation in 140 patients with hip fractures. There was no selection, and patients with minor or major complications before or after operation were included. In uncomplicated cases, the ESR was variably raised during the first week, whereas the CRP showed a distinct pattern with a rapid increase on the second day; it then decreased by the 7th day. In cases with early postoperative bronchopneumonia and deep wound infection, the CRP was high, but minor infections did not influence the usual levels. Complications had no effect on the ESR during the 1st week.
Collapse
Affiliation(s)
- N Ellitsgaard
- Department of Orthopaedic Surgery M, Bispebjerg Hospital, University of Copenhagen, Denmark
| | | | | | | |
Collapse
|
34
|
Auban P, Jérome D, Lerstrup K, Johannsen I, Jorgensen M, Bechgaard K. The ubiquity of the new organic conductor ditetramethyldithiadiselenafulvalene-hexafluorophosphate (TMDTDSF )2PF6. ACTA ACUST UNITED AC 1989. [DOI: 10.1051/jphys:0198900500180272700] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
35
|
Abstract
gamma-Carboxyglutamic acid residues on prothrombin are synthesized from glutamic acid on a prothrombin precursor in the liver through a vitamin K-dependent carboxylase. In the absence of vitamin K or in the presence of vitamin K antagonists, an inert form of prothrombin - abnormal prothrombin - circulates in the blood. We have developed specific immunoassays for native and abnormal human prothrombin. The prothrombin concentration in our normal subjects was 108 +/- 19 microgram per milliliter. The abnormal-prothrombin concentration varied over four orders of magnitude between the limits of detection in normal plasma and the level in patients with cirrhosis (0 to 5 microgram per milliliter), acute hepatitis (0 to 33 microgram per milliliter), or vitamin K deficiency (32 to 100 microgram per milliliter) and in those treated with sodium warfarin (12 to 65 microgram per milliliter). These studies indicate that abnormal prothrombin is not a component of normal plasma but appears in a variety of hepatic and nutritional disorders characterized by impaired hepatic vitamin-K-dependent carboxylation.
Collapse
|
36
|
Madsen L, Jorgensen M, Humlum H. [Study on project-oriented teaching in nursing education: students get increased responsibility for capitalizing on instruction]. Sygeplejersken 1977; 77:6-10. [PMID: 584072] [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: 12/23/2022]
|
37
|
Jorgensen M, Kolendorf K. [Qunindine poisoning. Symptoms and treatment]. Ugeskr Laeger 1975; 137:1111-3. [PMID: 1136000] [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: 12/25/2022]
|
38
|
Ranek L, Bremmelgaard A, Dupont B, Jorgensen M, Keiding S, Thomsen P, Tyrsted G. The effects of azathioprine on CCl4 induced cirrhosis in the rat. Beitr Pathol 1974; 152:66-73. [PMID: 4844636 DOI: 10.1016/s0005-8165(74)80021-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
39
|
Jorgensen M, Norgaard T, Faarup P. Functional structure of the cirrhotic rat liver. Acta Pathol Microbiol Scand A 1974; 82:13-20. [PMID: 4133273 DOI: 10.1111/j.1699-0463.1974.tb03822.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
40
|
Faarup P, Jorgensen M, Holm-Nielsen A. Functional structure of the rat liver. Influence of different types of preparation. Acta Pathol Microbiol Scand A 1974; 82:7-12. [PMID: 4133274 DOI: 10.1111/j.1699-0463.1974.tb03821.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
41
|
Jorgensen M. A stereological study of intrahepatic bile ducts. 4. Congenital hepatic fibrosis. Acta Pathol Microbiol Scand A 1974; 82:21-9. [PMID: 4827348] [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: 01/12/2023]
|
42
|
Jorgensen M. A stereological study of intrahepatic bile ducts. 1. Method and application to normal livers. Acta Pathol Microbiol Scand A 1973; 81:657-62. [PMID: 4601000] [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: 01/11/2023]
|
43
|
Jorgensen M. A stereological study of intrahepatic bile ducts. 3. Infantile polycystic disease. Acta Pathol Microbiol Scand A 1973; 81:670-5. [PMID: 4589284] [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: 01/11/2023]
|
44
|
Jorgensen M. A stereological study of intrahepatic bile ducts. 2. Bile duct proliferation in some pathological conditions. Acta Pathol Microbiol Scand A 1973; 81:663-9. [PMID: 4589283] [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: 01/11/2023]
|
45
|
|
46
|
Benkow HH, Jorgensen M. [Assessment of the root length with root canal therapy]. Tandlaegebladet 1972; 76:661-5. [PMID: 4505686] [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: 01/11/2023]
|
47
|
Abstract
ABSTRACT
A simple procedure for a reproducible preparation of radioiodinated angiotensin analogues is described. The iodination is performed at a low level of radioactivity – 200 μCi per 10 μg peptide – with low concentrations of chloramine-T and sodium metabisulphite. No destruction of the peptide occurs during the iodination. The yield is high, and the only purification step needed is a separation of iodinated peptide from non-labelled peptide. This separation is performed by means of column chromatography on DEAE-Sephadex A 25.
The specific activity of labelled angiotensin I or II prepared by this method was about 500 μCi/μg. The homogeneity of the radioiodinated angiotensin analogues was established by means of paper chromatography and enzymatic degradation studies, including experiments on the enzymatic conversion of 125I-angiotensin I to 125I-angiotensin II. Radiochromatograms obtained after storage for various periods showed perfect stability of the labelled compounds. Immunological characteristics, as evaluated by standard displacement curves with selected antisera and maximal binding to excess antibody, were reproducible from batch to batch.
Collapse
|
48
|
|
49
|
|
50
|
Jorgensen M, Molbech S, Johansen SH. Effect of decamethonium on head lift, hand grip, and respiratory muscle power in man. J Appl Physiol (1985) 1966; 21:509-12. [PMID: 5934455 DOI: 10.1152/jappl.1966.21.2.509] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
|