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Zemlin C, Nourkami-Tutdibi N, Schwarz P, Wagenpfeil G, Goedicke-Fritz S. Teaching breaking bad news in a gyneco-oncological setting: a feasibility study implementing the SPIKES framework for undergraduate medical students. BMC Med Educ 2024; 24:134. [PMID: 38347593 PMCID: PMC10863240 DOI: 10.1186/s12909-024-05096-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 01/24/2024] [Indexed: 02/15/2024]
Abstract
BACKGROUND It is a crucial task for physicians to deliver life threatening information to patients (breaking bad news; BBN). Many aspects influence these conversations on both sides, patients, and doctors. BBN affects the patient-physician relationship, patients' outcome, and physicians' health. Many physicians are still untrained for this multi-facetted task and feel unprepared and overburdened when facing situations of BBN. Therefore, any faculties should aim to integrate communication skills into their medical curricula as early as possible. The SPIKES protocol is an effective framework to deliver BBN. Aim of this study is to evaluate the feasibility and obstacles of a BBN seminar and its acceptance and learning curve among undergraduate medical students. METHODS 158 2nd year undergraduate medical students attended a compulsory BBN seminar. The task was to deliver a cancer diagnosis to the patient within a patient - physician role-play in a gyneco-oncological setting before and after a presentation of the SPIKES protocol by the lecturer. The students evaluated important communication skills during these role-plays respectively. Self-assessment questionnaires were obtained at the beginning and end of the seminar. RESULTS Most students indicated that their confidence in BBN improved after the seminar (p < 0.001). They like the topic BBN to be part of lectures (76%) and electives (90%). Communication skills improved. Lecturer and seminar were positively evaluated (4.57/5). CONCLUSION The seminar significantly increased confidence and self-awareness in delivering life-threatening news to patients among undergraduate medical students. Important learning aspects of BBN and communication skills could be delivered successfully to the participants within a short time at low costs. The integration of communication skills should be implemented longitudinally into medical curricula starting before clinical education to increase the awareness of the importance of communication skills, to decrease anxiety, stress, and workload for future doctors and- most importantly- to the benefit of our patients.
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Affiliation(s)
- Cosima Zemlin
- Department of Gynecology and Obstetrics, Faculty of Medicine, Saarland University, Homburg, Germany
| | | | - Pascal Schwarz
- Department of Gynecology and Obstetrics, Faculty of Medicine, Saarland University, Homburg, Germany
| | - Gudrun Wagenpfeil
- Institute of Medical Biometry, Epidemiology and Medical Informatics, Saarland University, Homburg, Germany
| | - Sybelle Goedicke-Fritz
- Department of General Pediatrics and Neonatology, Saarland University, Homburg, Germany.
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Lück HJ, Schmidt M, Hesse T, Hoffmann O, Heinrich BJ, Park-Simon TW, Grischke EM, Weide R, Müller-Huesmann H, Lüdtke-Heckenkamp K, Fischer D, Zemlin C, Kögel M, Wu J, Schmitz H, Engelbrecht C, Jackisch C. Incidence and Resolution of Eribulin-Induced Peripheral Neuropathy (IRENE) in Locally Advanced or Metastatic Breast Cancer: Prospective Cohort Study. Oncologist 2023; 28:e1152-e1159. [PMID: 37555463 PMCID: PMC10712709 DOI: 10.1093/oncolo/oyad191] [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: 12/22/2022] [Accepted: 05/04/2023] [Indexed: 08/10/2023] Open
Abstract
BACKGROUND Eribulin, a halichondrin-class microtubule dynamics inhibitor, is a preferred treatment option for patients with advanced breast cancer who have been pretreated with an anthracycline and a taxane. Peripheral neuropathy (PN) is a common side effect of chemotherapies for breast cancer and other tumors. The Incidence and Resolution of Eribulin-Induced Peripheral Neuropathy (IRENE) noninterventional postauthorization safety study assessed the incidence and severity of PN in patients with breast cancer treated with eribulin. PATIENTS AND METHODS IRENE is an ongoing observational, single-arm, prospective, multicenter, cohort study. Adult patients (≥18 years of age) with locally advanced or metastatic breast cancer and disease progression after 1-2 prior chemotherapeutic regimen(s) for advanced disease were treated with eribulin. Patients with eribulin-induced PN (new-onset PN or worsening of preexisting PN) were monitored until death or resolution of PN. Primary endpoints included the incidence, severity, and time to resolution of eribulin-induced PN. Secondary endpoints included time to disease progression and safety. RESULTS In this interim analysis (data cutoff date: July 1, 2019), 67 (32.4%) patients experienced any grade eribulin-induced PN, and 12 (5.8%) patients experienced grade ≥3 eribulin-induced PN. Median time to resolution of eribulin-induced PN was not reached. Median time to disease progression was 4.6 months (95% CI, 4.0-6.5). Treatment-emergent adverse events (TEAEs) occurred in 195 (93.8%) patients and serious TEAEs occurred in 107 (51.4%) patients. CONCLUSION The rates of any grade and grade ≥3 eribulin-induced PN observed in this real-world study were consistent with those observed in phase III randomized clinical trials. No new safety findings were observed.
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Affiliation(s)
- Hans-Joachim Lück
- Gynecologic Oncology, Gynäkologisch-Onkologische Praxis am Pelikanplatz, Hannover, Germany
| | - Marcus Schmidt
- Department of Obstetrics and Gynecology, University Medical Center Mainz, Mainz, Germany
| | - Tobias Hesse
- Department of Gynecology, Agaplesion Diakonieklinikum Rotenburg gGmbH, Rotenburg (Wuemme), Germany
| | - Oliver Hoffmann
- Department of Gynecology and Obstetrics, Universitätsklinikum Essen, Essen, Germany
| | | | | | | | - Rudolf Weide
- Oncological Outpatient Department, Praxis für Hämatologie und Onkologie Koblenz, Koblenz, Germany
| | - Harald Müller-Huesmann
- Department of Hematology/Oncology, Brüderkrankenhaus St. Josef Paderborn, Paderborn, Germany
| | - Kerstin Lüdtke-Heckenkamp
- Department of Hematology/Oncology, Niels Stensen Clinics, Franziskus Hospital, Georgsmarienhütte, Germany
| | - Dorothea Fischer
- Department of Gynaecology and Obstetrics, Hospital Ernst von Bergmann, Potsdam, Germany
| | - Cosima Zemlin
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | | | - Jane Wu
- Biostatistics, Eisai Inc., Nutley, NJ, USA
| | | | | | - Christian Jackisch
- Department of Obstetrics and Gynecology, Sana Klinikum Offenbach GmbH, Offenbach, Germany
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Zemlin C, Schleicher JT, Altmayer L, Stuhlert C, Wörmann C, Lang M, Scherer LS, Thul IC, Spenner LS, Simon JA, Wind A, Kaiser E, Weber R, Goedicke-Fritz S, Wagenpfeil G, Zemlin M, Steffgen G, Solomayer EF, Müller C. Improved awareness of physical activities is associated with a gain of fitness and a stable body weight in breast cancer patients during the first year of antineoplastic therapy: the BEGYN-1 study. Front Oncol 2023; 13:1198157. [PMID: 37637039 PMCID: PMC10456044 DOI: 10.3389/fonc.2023.1198157] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023] Open
Abstract
Background Breast cancer is the most frequent cancer in women. Reduced physical activity and overweight are associated with poor prognosis. Breast cancer patients have a high risk to gain weight, lose muscle mass and reduce physical activity during therapy. Concepts are urgently needed to motivate patients to engage in physical activity. Methods 110 non-metastatic breast cancer patients were included in the prospective observational BEGYN-1 study. Physiological parameters and body composition were measured before the start of therapy and then quarterly for one year. Patients used a fitness tracker and documented their physical activity in a diary throughout the study. Results Although the patients were not offered any guided exercise, and despite the restrictions during the COVID-19 pandemic, they increased their physical activity (metabolic equivalent of task (MET) -minutes): p<0.001), physical fitness (decreasing resting heart rate: p=0.001) and did not gain weight (median - 0.4kg) over the course of the study. Conclusion Improved awareness of physical activity is associated with an increase in physical activity, fitness, and a stable weight during the first year of therapy in breast cancer patients. Counselling at diagnosis should motivate patients to engage in physical activity, wear a fitness tracker and document activities.
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Affiliation(s)
- Cosima Zemlin
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Julia Theresa Schleicher
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Laura Altmayer
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Caroline Stuhlert
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Carolin Wörmann
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Marina Lang
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Laura-Sophie Scherer
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Ida Clara Thul
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Lisanne Sophie Spenner
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Jana Alisa Simon
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Alina Wind
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Elisabeth Kaiser
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, Homburg, Saar, Germany
| | - Regine Weber
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, Homburg, Saar, Germany
| | - Sybelle Goedicke-Fritz
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, Homburg, Saar, Germany
| | - Gudrun Wagenpfeil
- Institute for Medical Biometry, Epidemiology and Medical Informatics (IMBEI), Saarland University Campus Homburg, Homburg, Saar, Germany
| | - Michael Zemlin
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, Homburg, Saar, Germany
| | - Georges Steffgen
- Department of Behavioural and Cognitive Sciences, Institute for Health and Behaviour, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Erich-Franz Solomayer
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
| | - Carolin Müller
- Department of Gynecology, Obstetrics, and Reproductive Medicine, Saarland University Medical Center, Homburg, Saar, Germany
- Department of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, United States
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Zemlin C, Altmayer L, Stuhlert C, Schleicher JT, Wörmann C, Lang M, Scherer LS, Thul IC, Spenner LS, Simon JA, Wind A, Kaiser E, Weber R, Goedicke-Fritz S, Wagenpfeil G, Zemlin M, Solomayer EF, Reichrath J, Müller C. Prevalence and Relevance of Vitamin D Deficiency in Newly Diagnosed Breast Cancer Patients: A Pilot Study. Nutrients 2023; 15:nu15061450. [PMID: 36986179 PMCID: PMC10056197 DOI: 10.3390/nu15061450] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 03/19/2023] Open
Abstract
(1) Background: Vitamin D plays an important role in many types of cancer. It was the aim of this study to analyze serum 25-hydroxyvitamin D (25(OH)D) levels in newly diagnosed breast cancer patients, and the association with prognostic and lifestyle factors. (2) Methods: 110 non-metastatic breast cancer patients were included in the prospective observational “BEGYN” study at Saarland University Medical Center between September 2019 and January 2021. At the initiation visit, serum 25(OH)D levels were measured. Clinicopathological data on prognosis, nutrition, and lifestyle were extracted from data files and obtained using a questionnaire. (3) Results: Median serum 25(OH)D in breast cancer patients was 24 ng/mL (range 5–65 ng/mL), with 64.8% of patients being vitamin D deficient. 25(OH)D was higher among patients that reported the use of vitamin D supplements (43 ng/mL versus 22 ng/mL; p < 0.001), and in summer compared to other seasons (p = 0.03). Patients with moderate vitamin D deficiency were less likely to have triple negative breast cancer (p = 0.047). (4) Conclusions: Routinely measured vitamin D deficiency is common in breast cancer patients and needs to be detected and treated. However, our results do not support the hypothesis that vitamin D deficiency may be a main prognostic factor for breast cancer.
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Affiliation(s)
- Cosima Zemlin
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Laura Altmayer
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Caroline Stuhlert
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Julia Theresa Schleicher
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Carolin Wörmann
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Marina Lang
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Laura-Sophie Scherer
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Ida Clara Thul
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Lisanne Sophie Spenner
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Jana Alisa Simon
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Alina Wind
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Elisabeth Kaiser
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Regine Weber
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Sybelle Goedicke-Fritz
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Gudrun Wagenpfeil
- Institute for Medical Biometry, Epidemiology and Medical Informatics (IMBEI), Saarland University, Campus Homburg, 66421 Homburg, Germany
| | - Michael Zemlin
- Department of General Pediatrics and Neonatology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Erich-Franz Solomayer
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
| | - Jörg Reichrath
- Department of Dermatology, Venereology and Allergology, Saarland University Medical Center, 66421 Homburg, Germany
| | - Carolin Müller
- Department of Gynecology, Obstetrics & Reproductive Medicine, Saarland University Medical Center, 66421 Homburg, Germany
- Correspondence: ; Tel.: +49-6841-1628-000
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Zemlin C, Stuhlert C, Schleicher JT, Wörmann C, Altmayer L, Lang M, Scherer LS, Thul IC, Müller C, Kaiser E, Stutz R, Goedicke-Fritz S, Ketter L, Zemlin M, Wagenpfeil G, Steffgen G, Solomayer EF. Longitudinal Assessment of Physical Activity, Fitness, Body Composition, Immunological Biomarkers, and Psychological Parameters During the First Year After Diagnosis in Women With Non-Metastatic Breast Cancer: The BEGYN Study Protocol. Front Oncol 2021; 11:762709. [PMID: 34737966 PMCID: PMC8560964 DOI: 10.3389/fonc.2021.762709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 08/22/2021] [Accepted: 10/01/2021] [Indexed: 12/24/2022] Open
Abstract
Background Moderate physical activity is associated with an improved prognosis and psychosocial outcome in breast cancer patients. Although exercise and physical activity are associated with multiple physiological and psychological effects, many of the underlying mechanisms remain obscure. The BEGYN study (Influence of physical activity in breast cancer patients on physiological and psychological parameters and on biomarkers) aims at identifying potential associations between the extent of physical activity, fitness, body composition, immunological biomarkers, psycho-emotional parameters, and the course of treatment during the first year after diagnosis of breast cancer. Methods The prospective observational BEGYN study will include 110 non-metastatic breast cancer patients. The patients will be assessed during a base line visit prior to the initiation of the antineoplastic therapy and after 3, 6, 9 and 12 months. The physical activity will be measured using a fitness tracker and a self-assessment diary during the entire study. Each visit will include the assessment of (i) cardiorespiratory fitness measured by spiroergometry, (ii) body composition, (iii) psycho-emotional parameters (quality of life, mental health, fatigue, depression, distress, anxiety, well-being), and (iv) extensive blood tests including routine laboratory, vitamin D, selenium and immunologically relevant biomarkers (e.g., leukocyte subpopulations and cytokine profiles). Discussion Whereas most studies investigating the influence of physical activity in breast cancer patients focus on specific activities for three months or less, the BEGYN study will quantify the daily physical activity and cardiorespiratory fitness of breast cancer patients based on objective measurements in the context of the oncological therapy for 12 months after diagnosis. The study will reveal potential associations between exercise, immune status and physical as well as psycho-emotional outcome and the clinical course of the disease. Moreover, complementary therapies such as Vit D and Selenium supplementation and parameters investigating the motivation of the patients are part of the study. Due to this holistic approach, the BEGYN study will guide towards confirmatory studies on the role of physical activity in breast cancer patients to develop individualized counselling regarding the recommended type and extent of exercise. Trial Registration This study has been registered at the German Clinical Trials Register DRKS00024829.
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Affiliation(s)
- Cosima Zemlin
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Caroline Stuhlert
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Julia Theresa Schleicher
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Carolin Wörmann
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Laura Altmayer
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Marina Lang
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Laura-Sophie Scherer
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Ida Clara Thul
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Carolin Müller
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
| | - Elisabeth Kaiser
- Department for General Pediatrics, Saarland University Medical Center, Homburg, Germany
| | - Regine Stutz
- Department for General Pediatrics, Saarland University Medical Center, Homburg, Germany
| | | | - Laura Ketter
- Department of Behavioural and Cognitive Sciences, Institute for Health and Behaviour, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Michael Zemlin
- Department for General Pediatrics, Saarland University Medical Center, Homburg, Germany
| | - Gudrun Wagenpfeil
- Institute for Medical Biometry, Epidemiology and Medical Informatics (IMBEI), Saarland University, Homburg, Germany
| | - Georges Steffgen
- Department of Behavioural and Cognitive Sciences, Institute for Health and Behaviour, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Erich-Franz Solomayer
- Department for Gynecology, Obstetrics and Reproductive Medicine, Saarland University Medical Center, Homburg, Germany
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Vale AM, Kapoor P, Skibinski GA, Elgavish A, Mahmoud TI, Zemlin C, Zemlin M, Burrows PD, Nobrega A, Kearney JF, Briles DE, Schroeder HW. The link between antibodies to OxLDL and natural protection against pneumococci depends on D(H) gene conservation. ACTA ACUST UNITED AC 2013; 210:875-90. [PMID: 23589567 PMCID: PMC3646500 DOI: 10.1084/jem.20121861] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Germline DH sequences are required for the generation of natural antibodies reactive to bacterial phosphorylcholine but not for those reactive to self-antigen. Selection and physiological production of protective natural antibodies (NAbs) have been associated with exposure to endogenous antigens. The extent to which this association depends on germline NAb sequence is uncertain. Here we show that alterations in germline DH sequence can sever the association between the production of self-reactive NAbs and NAbs that afford protection against a pathogen. In unmanipulated hosts, the availability of the evolutionarily conserved DFL16.1 gene segment sequence profoundly affected the serum levels of NAbs against bacterial phosphorylcholine but not oxidized low-density lipoprotein. Mice with partially altered DFL16.1 sequence could use N nucleotides to recreate the amino acid sequence associated with the classical protective T15 idiotype–positive NAbs, whereas those without DFL16.1 could not. DFL16.1 gene–deficient mice proved more susceptible to challenge with live Streptococcus pneumoniae. Our findings indicate that although production of self-reactive NAbs can be independent of germline DH sequence, their capacity to provide protection against pathogens cannot. The potential relevance of these findings for the rational design of vaccines is discussed.
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Affiliation(s)
- Andre M Vale
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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Rogosch T, Kerzel S, Hoss K, Hoersch G, Zemlin C, Heckmann M, Berek C, Schroeder HW, Maier RF, Zemlin M. IgA response in preterm neonates shows little evidence of antigen-driven selection. J Immunol 2012; 189:5449-56. [PMID: 23105134 DOI: 10.4049/jimmunol.1103347] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
After birth, contact to environmental Ags induces the production of IgA, which represents a first line of defense for the neonate. We sought to characterize the maturation of the repertoire of IgA H chain transcripts in circulating blood B cells during human ontogeny. We found that IgA H chain transcripts were present in cord blood as early as 27 wk of gestation and that the restrictions of the primary Ab repertoire (IgM) persisted in the IgA repertoire. Thus, B cells harboring more "mature" V(H) regions were not preferred for class switch to IgA. Preterm and term neonates expressed a unique IgA repertoire, which was characterized by short CDR-H3 regions, preference of the J(H) proximal D(H)7-27 gene segment, and very few somatic mutations. During the first postnatal months, these restrictions were slowly released. Preterm birth did not measurably accelerate the maturation of the IgA repertoire. At a postconceptional age of 60 wk, somatic mutation frequency of IgA H chain transcripts reached 25% of the adult values but still showed little evidence of Ag-driven selection. These results indicate that similar to IgG, the IgA repertoire expands in a controlled manner after birth. Thus, the IgA repertoire of the newborn has distinctive characteristics that differ from the adult IgA repertoire. These observations might explain the lower affinity and specificity of neonatal IgA Abs, which could contribute to a higher susceptibility to infections and altered responses to vaccinations, but might also prevent the development of autoimmune and allergic diseases.
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Affiliation(s)
- Tobias Rogosch
- Department of Pediatrics, Philipps University Marburg, 35033 Marburg, Germany
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Wiegard K, Albert US, Zemlin C, Lubbe D, Kleiber C, Kolb-Niemann B, Schade-Brittinger C, Wagner U, Herrmann-Lingen C. [Psychological distress of breast cancer patients: screening and patients' request for psycho-oncological care as indicators of health-related quality of life]. Psychother Psychosom Med Psychol 2012; 62:129-35. [PMID: 22473429 DOI: 10.1055/s-0032-1306355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Health-related quality of life (QoL) in breast cancer patients strongly depends on emotional well-being. QoL (EORTC-QLQ-C30), psychological distress (HADS), and patient's request for psycho-oncological care were assessed in 103 breast cancer patients during initial hospitalization. Clinical diagnoses according to ICD-10-F were made by clinical interview. As expected, both positive HADS screens (>13) and clinical diagnoses of mental disorders were inversely related to QoL. However, in multivariate analysis of variance only positive HADS scores but not clinical diagnoses of mental disorders significantly predicted QoL. The performance of psychological screening instruments should therefore not only be judged by their ability to detect clinical diagnoses but also by their relevance for reflecting patients' QoL.
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Affiliation(s)
- Karin Wiegard
- Klinik für Psychosomatische Medizin und Psychotherapie, -Universitätsklinikum Gießen und Marburg GmbH, Standort Marburg, Baldingerstrasse, Marburg.
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Zemlin C, Herrmann-Lingen C, Wiegard K, Kleiber C, Kolb-Niemann B, Lubbe D, Schade-Brittinger C, Wagner U, Albert US. Implementierung eines EDV- und Screening-gestützten psychoonkologischen Versorgungspfads. Geburtshilfe Frauenheilkd 2011. [DOI: 10.1055/s-0031-1280257] [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: 10/16/2022] Open
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Albert US, Zemlin C, Hadji P, Ziller V, Kuhler B, Frank-Hahn B, Wagner U, Kalder M. The Impact of Breast Care Nurses on Patients' Satisfaction, Understanding of the Disease, and Adherence to Adjuvant Endocrine Therapy. ACTA ACUST UNITED AC 2011; 6:221-226. [PMID: 21779228 DOI: 10.1159/000329006] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND: Breast care nurses (BCNs) are specialized caregivers in certified breast cancer center teams. The impact of a BCN's work remains unknown. PATIENTS AND METHODS: The role of BCN care was evaluated in a post-discharge mail survey of 360 patients. RESULTS: A total of 207 (87%) of 237 (66%) returned questionnaires were analyzed; 171 (83%) patients had BCN contact, 36 (17%) did not. The mean global quality of life scores (EORTC-QLQ-C30) were 66.3 for women with contact to a BCN versus 62.5 for women without such contact (p < 0.05). Women with a BCN contact had better results than women without (p < 0.001) for the following parameters: receipt of information material (84 vs. 64%), information about hospital procedures (93 vs. 72%) and treatment plan (91 vs. 63%), and knowledge of own tumor hormone receptor status (83 vs. 53%). Medication adherence correlated with the knowledge about the tumor hormone receptor status and was significantly higher in women having contact with a BCN (79 vs. 56%). The high recommendation rate (81%) reflects the high level of satisfaction with BCNs. A qualitative analysis of comments and suggestions identified aspects to improve BCN services. CONCLUSIONS: BCN improve satisfaction and treatment adherence in breast cancer patients.
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Affiliation(s)
- Ute-Susann Albert
- Klinik für Gynäkologie, Gynäkologische Endokrinologie und Onkologie, Universitátsklinikum Giessen und Marburg, Germany
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11
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Zemlin C, Veenstra RD. What is the structural substrate for atrial fibrillation? Cardiology 2009; 114:19-21. [PMID: 19342854 DOI: 10.1159/000210397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/14/2009] [Accepted: 02/15/2009] [Indexed: 11/19/2022]
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12
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Zemlin M, Schelonka RL, Ippolito GC, Zemlin C, Zhuang Y, Gartland GL, Nitschke L, Pelkonen J, Rajewsky K, Schroeder HW. Regulation of repertoire development through genetic control of DH reading frame preference. J Immunol 2009; 181:8416-24. [PMID: 19050259 DOI: 10.4049/jimmunol.181.12.8416] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In jawed vertebrates most expressed Ig H chains use only one of six possible D(H) reading frames. Reading frame (RF)1, the preferred reading frame, tends to encode tyrosine and glycine, whereas the other five RFs tend to be enriched for either hydrophobic or charged amino acids. Mechanisms proposed to favor use of RF1 include a preference for deletion over inversion that discourages use of inverted RF1, RF2, and RF3; sequence homology between the 5' terminus of the J(H) and the 3' terminus of the D(H) that promotes rearrangement into RF1; an ATG start site upstream of RF2 that permits production of a truncated Dmicro protein; stop codons in RF3; and, following surface expression of IgM, somatic, presumably Ag receptor-based selection favoring B cells expressing Igs with tyrosine- and glycine-enriched CDR-H3s. By creating an IgH allele limited to the use of a single, frameshifted DFL16.1 D(H) gene segment, we tested the relative contribution of these mechanisms in determining reading frame preference. Dmicro-mediated suppression via an allelic exclusion-like mechanism dominated over somatic selection in determining the composition of the CDR-H3 repertoire. Evidence of somatic selection for RF1-encoded tyrosine in CDR-H3 was observed, but only among the minority of recirculating, mature B cells that use D(H) in RF1. These observations underscore the extent to which the sequence of the D(H) acts to delimit the diversity of the Ab repertoire.
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Affiliation(s)
- Michael Zemlin
- Department of Pediatrics, Philipps Universität Marburg, Marburg, Germany
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13
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Zemlin C, Herrmann-Lingen C, Wiegard K, Kleiber CL, Wagner U, Albert US. Entwicklung und Implementierung eines psychoonkologischen Behandlungspfads in die Routineversorgung eines regionalen Brustzentrums – Untersuchung der Effekte auf Patientinnen und Behandler. Geburtshilfe Frauenheilkd 2008. [DOI: 10.1055/s-0028-1088898] [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: 10/19/2022] Open
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14
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Herrmann-Lingen C, Zemlin C, Wiegard K, Kleiber C, Wagner U, Albert US. Implementierung eines gestuften psychoonkologischen Behandlungspfads in die Routineversorgung eines regionalen Brustzentrums – Effekte auf Patientinnen und Behandler. Geburtshilfe Frauenheilkd 2008. [DOI: 10.1055/s-2008-1079248] [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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15
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Nguyen HH, Zemlin M, Ivanov II, Andrasi J, Zemlin C, Vu HL, Schelonka R, Schroeder HW, Mestecky J. Heterosubtypic immunity to influenza A virus infection requires a properly diversified antibody repertoire. J Virol 2007; 81:9331-8. [PMID: 17567700 PMCID: PMC1951409 DOI: 10.1128/jvi.00751-07] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Heterosubtypic immunity (HSI) is defined as cross-protection to infection with an influenza A virus serotype other than the one used for primary infection. Although HSI has been thought to be mediated by serotype cross-reactive cytotoxic T lymphocytes (CTL) that recognize conserved epitopes of structural proteins, recent studies suggest that antibodies (Abs) may make a significant contribution. In this study, we provide further evidence for the role of Abs in HSI using transgenic mice lacking terminal deoxyribonucleotidyltransferase (TdT), which adds N nucleotides to V-D and D-J junctions of the complementary determining region 3 (CDR3) (TdT(-/-)) and mice with altered Ab repertoires due to replacement of the complete locus of heavy chain diversity segments (D(H)) with an altered D(H) segment (namely, Delta D-iD). Both types of mice failed to generate complete HSI, although they were able to mount protective immunity to a homologous challenge. Lower levels of virus-specific antibodies along with more severely impaired HSI were observed in TdT(-/-) mice compared to those in Delta D-iD mice, while CTL activity remained unchanged in both types of mice. These findings indicate that a properly diversified antibody repertoire is required for HSI and that N addition by TdT is a more effective mechanism in the induction of a properly diversified antibody repertoire and, therefore, complete HSI. The results suggest that the diversity of the antibody repertoire as determined by the composition of the D region of HCDR3 and by N addition are among the mechanisms selected for in evolution to create a favorable environment to resolve infections with mutated viruses.
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MESH Headings
- Animals
- Antibodies, Viral/immunology
- Body Weight
- Cross Reactions
- DNA Nucleotidylexotransferase/deficiency
- Disease Models, Animal
- Humans
- Immunoglobulin Heavy Chains/genetics
- Influenza A virus/immunology
- Influenza, Human/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Receptors, Antigen, T-Cell/immunology
- Sequence Deletion
- Survival Analysis
- T-Lymphocyte Subsets/immunology
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Helper-Inducer/immunology
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Affiliation(s)
- Huan H Nguyen
- Department of Microbiology, The University of Alabama at Birmingham, Birmingham, Alabama 35294-2170, USA.
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16
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Zemlin M, Hoersch G, Zemlin C, Pohl-Schickinger A, Hummel M, Berek C, Maier RF, Bauer K. The postnatal maturation of the immunoglobulin heavy chain IgG repertoire in human preterm neonates is slower than in term neonates. J Immunol 2007; 178:1180-8. [PMID: 17202383 DOI: 10.4049/jimmunol.178.2.1180] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
During the perinatal period the development of the IgH chain CDR3 (CDR-H3) repertoire of IgM transcripts is maturity-dependent and not influenced by premature exposure to Ag. To study whether maturity-dependent restrictions also predominate in the perinatal IgG repertoire we compared 1000 IgG transcripts from cord blood and venous blood of extremely preterm neonates (24-28 wk of gestation) and of term neonates from birth until early infancy with those of adults. We found the following. First, premature contact with the extrauterine environment induced the premature development of an IgG repertoire. However after preterm birth the diversification of the IgG repertoire was slower than that after term birth. Second, the IgG repertoire of preterm neonates retained immature characteristics such as short CDR-H3 regions and overrepresentation of D(H)7-27. Third, despite premature exposure to the extrauterine environment, somatic mutation frequency in IgG transcripts of preterm infants remained low until they reached a postconceptional age corresponding to the end of term gestation. Thereafter, somatic mutations accumulated with age at similar rates in preterm and term neonates and reached 30% of the adult level after 6 mo. In conclusion, class switch was inducible already at the beginning of the third trimester of gestation, but the developing IgG repertoire was characterized by similar restrictions as those of the developing IgM repertoire. Those B cells expressing more "mature" H chain sequences were not preferentially selected into the IgG repertoire. Therefore, the postnatal IgG repertoire of preterm infants until the expected date of delivery differs from the postnatal repertoire of term neonates.
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Affiliation(s)
- Michael Zemlin
- Department of Pediatrics, Philipps University Marburg, Baldinger Street, 35033 Marburg, Germany.
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17
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Zemlin M, Hörsch G, Zemlin C, Pohl A, Bauer K, Maier R. Eingeschränkte Affinitätsreifung von IgG- und IgA-Antikörpern bei Frühgeborenen und Reifgeborenen. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946051] [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: 10/19/2022]
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18
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Ippolito GC, Schelonka RL, Zemlin M, Ivanov II, Kobayashi R, Zemlin C, Gartland GL, Nitschke L, Pelkonen J, Fujihashi K, Rajewsky K, Schroeder HW. Forced usage of positively charged amino acids in immunoglobulin CDR-H3 impairs B cell development and antibody production. ACTA ACUST UNITED AC 2006; 203:1567-78. [PMID: 16754718 PMCID: PMC3212734 DOI: 10.1084/jem.20052217] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Tyrosine and glycine constitute 40% of complementarity determining region 3 of the immunoglobulin heavy chain (CDR-H3), the center of the classic antigen-binding site. To assess the role of DH RF1-encoded tyrosine and glycine in regulating CDR-H3 content and potentially influencing B cell function, we created mice limited to a single DH encoding asparagine, histidine, and arginines in RF1. Tyrosine and glycine content in CDR-H3 was halved. Bone marrow and spleen mature B cell and peritoneal cavity B-1 cell numbers were also halved, whereas marginal zone B cell numbers increased. Serum immunoglobulin G subclass levels and antibody titers to T-dependent and T-independent antigens all declined. Thus, violation of the conserved preference for tyrosine and glycine in DH RF1 alters CDR-H3 content and impairs B cell development and antibody production.
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Affiliation(s)
- Gregory C. Ippolito
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - Robert L. Schelonka
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - Michael Zemlin
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - Ivaylo I. Ivanov
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - Ryoki Kobayashi
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - Cosima Zemlin
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - G. Larry Gartland
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - Lars Nitschke
- Department of Genetics, University of Erlangen, 91058 Erlangen, Germany
| | - Jukka Pelkonen
- Department of Clinical Microbiology, University of Kuopio, POB 1627, 70211 Kuopio, Finland
| | - Kohtaro Fujihashi
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
| | - Klaus Rajewsky
- The Center for Blood Research, Harvard Medical School, Boston, MA 02115
| | - Harry W. Schroeder
- Department of Microbiology, Department of Pediatrics, Department of Medicine, Department of Pediatric Dentistry, and Department of Genetics, University of Alabama at Birmingham, SHEL 401, Birmingham, AL 35294
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19
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Zemlin M, Hörsch G, Zemlin C, Pohl A, Bauer K, Maier R. Eingeschränkte Affinitätsreifung von IgG- und IgA-Antikörpern bei Frühgeborenen und Reifgeborenen. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943136] [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: 10/19/2022]
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20
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Zemlin M, Ippolito GC, Zemlin C, Link J, Monestier M, Schroeder HW. Adult lupus-prone MRL/MpJ2+ mice express a primary antibody repertoire that differs in CDR-H3 length distribution and hydrophobicity from that expressed in the C3H parental strain. Mol Immunol 2004; 42:789-98. [PMID: 15829267 DOI: 10.1016/j.molimm.2004.07.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [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] [Received: 05/14/2004] [Accepted: 07/11/2004] [Indexed: 11/27/2022]
Abstract
Anti-dsDNA antibodies tend to be enriched for heavy chain complementarity determining region 3 (CDR-H3) intervals of above average length that contain an increased frequency of charged amino acids. It is unclear whether these types of CDR-H3s are more common in the primary B-cell repertoire of auto-immune prone strains or whether their increased prevalence in affected individuals reflects positive selection and expansion of atypical CDR-H3s in the pathogenic response to self-antigen. Here, we present evidence that when compared to C3H, a MRL/MpJ(2+) parental strain, CDR-H3 intervals from pre-B cells of adult lupus-prone MRL/MpJ(2+) mice are longer on average and are enriched for charged amino acids. The predicted prevalence of deformed loops per Shirai H3 criteria is also higher. In contrast, the frequency of charge, the distribution of length, and the pattern of predicted deformed loop structures did not differ in sequences obtained from neonates of the same two strains. These observations suggest that the mechanisms that serve to shape the initial CDR-H3 repertoire in adults, but not neonates, are being regulated differently in C3H versus MRL/MpJ(2+). Dysregulation of the adult pre-B CDR-H3 antibody repertoire could be a contributing factor for the development of florid auto-immune disease in MRL/MpJ(2+) mice.
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Affiliation(s)
- Michael Zemlin
- Clinic for Neonatology and Neuropediatrics, Philipps Universität Marburg, Deutschhausstr. 12, 35037 Marburg, Germany
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Zemlin M, Zemlin C, Karstädt J, Bauer K. Die Vielfalt des vom Kind gebildeten IgG nimmt bei Frühgeborenen langsamer zu als bei Reifgeborenen. Z Geburtshilfe Neonatol 2004. [DOI: 10.1055/s-2004-829369] [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: 10/20/2022]
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22
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Lobmann R, Zemlin C, Pap T, Motzkau M, Lehnert H. Local treatment with protease-inhibitors does not affect the expression of matrix-metalloproteases, but promotes wound healing in diabetic patients. Exp Clin Endocrinol Diabetes 2004. [DOI: 10.1055/s-2004-819157] [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: 10/28/2022]
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23
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Zemlin M, Klinger M, Link J, Zemlin C, Bauer K, Engler JA, Schroeder HW, Kirkham PM. Expressed murine and human CDR-H3 intervals of equal length exhibit distinct repertoires that differ in their amino acid composition and predicted range of structures. J Mol Biol 2004; 334:733-49. [PMID: 14636599 DOI: 10.1016/j.jmb.2003.10.007] [Citation(s) in RCA: 255] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Immunoglobulin junctional diversity is concentrated in the third complementarity-determining region of the heavy chain (CDR-H3), which often plays a dominant role in antigen binding. The range of CDR-H3 lengths in mouse is shorter than in human, and thus the murine repertoire could be presumed to be a subset of the human one. To test this presumption, we analyzed 4751 human and 2170 murine unique, functional, published CDR-H3 intervals. Although tyrosine, glycine, and serine were found to predominate in both species, the human sequences contained fewer tyrosine residues, more proline residues, and more hydrophobic residues (p<0.001, respectively). While changes in amino acid utilization as a function of CDR-H3 length followed similar trends in both species, murine and human CDR-H3 intervals of identical length were found to differ from each other. These differences reflect both divergence of germline diversity and joining gene sequence and somatic selection. Together, these factors promote the production of a rather uniform repertoire in mice of tyrosine-enriched CDR-H3 loops with stabilized hydrogen bond-ladders versus a much more diverse repertoire in human that contains CDR-H3 loops sculpted by the presence of intra-chain disulfide bonds due to germline-encoded cysteine residues as well as the enhanced presence of somatically generated proline residues that preclude hydrogen bond ladder formation. Thus, despite the presumed need to recognize a similar range of antigen epitopes, the murine CDR-H3 repertoire is clearly distinct from its human counterpart in its amino acid composition and its predicted range of structures. These findings represent a benchmark to which CDR-H3 repertoires can be compared to better characterize and understand the shaping of the CDR-H3 repertoire over evolution and during immune responses. This information may also be useful for the design of species-specific CDR-H3 sequences in synthetic antibody libraries.
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Affiliation(s)
- Michael Zemlin
- Department of Medicine, University of Alabama at Birmingham, 1530 3rd Avenue South, Birmingham, AL 35294-3300, USA
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24
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Zemlin M, Bauer K, Hummel M, Pfeiffer S, Devers S, Zemlin C, Stein H, Versmold HT. The diversity of rearranged immunoglobulin heavy chain variable region genes in peripheral blood B cells of preterm infants is restricted by short third complementarity-determining regions but not by limited gene segment usage. Blood 2001; 97:1511-3. [PMID: 11222402 DOI: 10.1182/blood.v97.5.1511] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [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: 11/20/2022] Open
Abstract
The immunoglobulin diversity is restricted in fetal liver B cells. This study examined whether peripheral blood B cells of extremely preterm infants show similar restrictions (overrepresentation of some gene segments, short third complementarity-determining regions [CDR3]). DNA of rearranged immunoglobulin heavy chain genes was amplified by polymerase chain reaction, cloned, and sequenced. A total of 417 sequences were analyzed from 6 preterm infants (25-28 weeks of gestation), 6 term infants, and 6 adults. Gene segments from the entire V(H) and D(H) gene locus were rearranged in preterm infants, even though the D(H)7-27 segment was overrepresented (17% of rearrangements) compared to term infants (7%) and adults (2%). CDR3 was shorter in preterm infants (40 +/- 10 nucleotides) than in term infants (44 +/- 12) and adults (48 +/- 14) (P <.001) due to shorter N regions. Somatic mutations were exclusively found in term neonates and adults (mutational frequency 0.8% and 1.8%). We conclude that preterm infants have no limitations in gene segment usage, whereas the diversity of CDR3 is restricted throughout gestation.
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Affiliation(s)
- M Zemlin
- Department of Pediatrics and Pathology, Freie Universität Berlin, Berlin, Germany
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Zemlin C. [The problem: antibiotic resistance in wound infection. Solution: modern wound therapy]. Krankenpfl J 2000; 38:220-1. [PMID: 11190181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Koelsch KA, Kühne C, Zemlin C. [Functional behavior patterns of the pylorus in duodeno-gastric reflux]. Z Gesamte Inn Med 1979; 34:227-9. [PMID: 539011] [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: 12/23/2022]
Abstract
There are relations between function of the pylorus and the appearance of duodeno-gastric reflux. However, much speaks for the fact that the pylorus alone is not able to prevent duodeno-gastric reflux. In the problem of the causes of reflux also the motoric behaviour of the upper duodenum must be taken into consideration.
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Koelsch KA, Kühne C, Zemlin C. [Post-cholecystectomy condition: duodeno-gastric reflux and bile acid concentration in the gastric juice]. Z Gesamte Inn Med 1979; 34:361-4. [PMID: 538988] [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: 12/23/2022]
Abstract
In cholecystectomized patients highly significantly more frequently a duodenogastric reflux was found than in a group of patients with a healthy abdomen and a group of patients with cholelithiasis. The average concentration of bile acid in the gastric juice was after the removal of the gall-bladder manifoldly higher than in the control groups. The number of patients with concentrated reflux was also highly significantly larger than in patients with cholelithiasis not operated on and in patients with a healthy abdomen. Despite the high reflux rate and the high concentration of the bile acids influencing on the mucous membrane of the stomach the number of patients with ulcera ventriculi was not significantly larger than in a group of not cholecystectomized persons. These observations plead for the fact that the bile acids in the duodenogastric reflux alone are not to be regarded as an ulcerogenic agent, but that perhaps other components of the duodenal juice have to be considered as causes of lesions of the gastric mucous membrane.
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Koelsch KA, Zemlin C. [Mitral valve disorders and bile duct diseases]. Z Gesamte Inn Med 1975; 30:51-54. [PMID: 1241199] [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: 12/26/2022]
Abstract
In a number of cases of post-mortem examinations of patients with mitral valve defects a morbidity rate of cholelithiasis of 41.3 per cent was found, above all by the larger morbidity rate in younger women. Up to the 50th year it was 37.1 per cent at an average death age of 40.7 years. Is was conspicuous that more women who had not been delivered suffered from cholelithiasis than those ones who had been delivered (68.9 per cent of the nulliparae). Before the 50th year 55.6 per cent of the women who had not been delivered suffered from such a disease at an average death age of 39.3 years. Probably in these women the heart disease was so severe that there did not develop a gravidity.
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