281 results match your criteria: "Karolinska Institute and University Hospital[Affiliation]"

Prognostic relevance of CD163 immune cells in patients with metastatic breast cancer.

Cancer Immunol Immunother

January 2025

Department of Clinical Sciences Lund, Division of Oncology, Lund University, 221 84, Lund, Sweden.

Metastatic breast cancer (MBC) is generally considered an incurable disease and even though new treatments are available, the median survival is approximately three years. The introduction of immune therapies for MBC highlights the importance of the immune system in cancer progression and treatment. CD163 anti-inflammatory myeloid cells, including tumor associated macrophages (TAMs), are known to be of relevance in early breast cancer but their role in MBC is not yet established.

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Organismal mucosal immunology: A perspective through the eyes of game theory.

Mucosal Immunol

December 2024

Division of Immunology and Respiratory Medicine, Department of Medicine Solna, Karolinska Institute and University Hospital, Stockholm, Sweden; Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden; Center of Molecular Medicine, Stockholm, Sweden. Electronic address:

Article Synopsis
  • In complex organisms, mucosal barriers consist of specialized cells that must work together to maintain homeostasis against environmental challenges, with disruptions linked to autoimmune diseases and cancer.
  • While omics approaches and systems immunology have made significant strides, they may rely too heavily on researchers' assumptions, highlighting the need for new analytical frameworks.
  • By applying game theory to mucosal immunology, researchers can better understand the strategic interactions within the immune system, potentially revealing novel insights into cell functions, pathogen responses, and the overall complexity of immune homeostasis.
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Background: Immune checkpoint inhibitors are now a part of the treatment arsenal for triple-negative breast cancer (TNBC) but refinement of PD-L1 as a prognostic and predictive biomarker is a clinical priority. We aimed to evaluate the relevance of novel PD-L1 immunohistochemical (IHC) thresholds in TNBC with regard to PD-L1 gene expression, prognostic value, tumor infiltrating lymphocytes (TILs), and TNBC molecular subtypes.

Material & Methods: PD-L1 was scored in a tissue microarray with the SP142 (immune cell (IC) score) and the 22C3 (combined positive score; CPS) IHC assays and TIL abundance evaluated in whole slides in a population-based cohort of 237 early-stage TNBC patients.

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Anyone can cook, but only the fearless can be a great chef.

Immunol Cell Biol

January 2025

Division of Immunology and Respiratory Medicine, Department of Medicine Solna, Karolinska Institute and University Hospital, Stockholm, Sweden.

Role models play a crucial role in inspiring and guiding careers in science, offering tangible examples of success and resilience. Reflecting on my journey from a small town in southern Chile to leading a lab at Karolinska Institutet, I've learned that relatable role models are particularly impactful for overcoming imposter syndrome and fostering a sense of belonging in academia. Early in my career, I drew inspiration from peers and mentors, gradually building my confidence and embracing my strengths.

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Article Synopsis
  • - Growth hormone treatment has evolved from using pituitary-derived GH for specific cases of GH deficiency to recombinant human GH (rhGH), which is now approved for various disorders beyond just GH deficiency.
  • - RhGH significantly helps improve short stature in GH-deficient patients and has positive effects on metabolic and bone health, with long-term safety studies showing encouraging results, particularly for those with isolated GHD.
  • - New long-acting rhGH formulations are being developed to enhance adherence to treatment and lessen the burden on patients, while ongoing surveillance is needed for safety in higher doses or other clinical conditions.
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Liver X receptor unlinks intestinal regeneration and tumorigenesis.

Nature

November 2024

Division of Immunology and Respiratory Medicine, Department of Medicine Solna, Karolinska Institutet and University Hospital, Stockholm, Sweden.

Article Synopsis
  • Uncontrolled regeneration in the intestinal epithelium can lead to cancer, highlighting the need for precise regulation during tissue renewal.
  • Researchers discovered that activating the liver X receptor (LXR) pathway helps balance intestinal regeneration and tumor growth after damage.
  • LXR activation enhances regeneration by producing amphiregulin and is crucial for controlling tumor growth, with diminished LXR-related activity found in human colorectal cancer samples.
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Chronic mucosal inflammation and architectural crypt distortions (ACD) are essential for the histologic diagnosis of ulcerative colitis (UC). ACD in UC has been defined as irregularly arranged, dilated, branched, and shortened crypts with inequality of inter-crypt distance. However, neither the diagnostic sections' crypt phenotype nor the cutting mode have been considered.

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Article Synopsis
  • Childhood cancer treatments can lead to long-term health issues and earlier death, particularly in male survivors who received conventional therapies from 1964 to 2000.
  • A study involving 200 male childhood cancer survivors (CCS) and 1,000 matched controls found that CCS experienced higher rates of hospital admissions for cardiovascular diseases and increased mortality after age 40.
  • Specific treatments, like heart radiation, were linked to significant health risks, while most survivors did not show excessive use of certain mental health medications, highlighting the importance of ongoing health monitoring for these individuals.
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Article Synopsis
  • Tumoroscope is a new probabilistic model that accurately identifies cancer clones and their locations in tumors using pathological images, whole exome sequencing, and spatial transcriptomics data, achieving near single-cell resolution.
  • Unlike previous methods, Tumoroscope effectively resolves the proportions of different cancer clones within spatial transcriptomics spots.
  • The model has been applied to prostate and breast cancer datasets, revealing spatial patterns of clone distribution and allowing the analysis of clone-specific gene expression.
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Background: Childhood cancer therapy may cause subfertility. This study correlated cancer therapy exposures with testicular volumes from puberty to adulthood, spermatogenesis, and paternity outcomes in adulthood.

Methods: The study population comprised 255 male childhood cancer survivors (CCS) (survival ≥5 years, diagnosed in 1964-2000 at the Helsinki Children's Hospital) whose testicular volume was measured at ages 12 years (n = 38), 14 years (n = 57), 16 years (n = 63), 18 years (n = 105), and in adulthood (n = 43; median age, 27 years).

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GATA binding protein 3 (GATA3) is essential for normal development of the mammary gland and associated with ER-positive breast cancer. Loss of GATA3 has been associated with epithelial-mesenchymal transition (EMT) in experimental studies. We investigated tumoral GATA3 in a cohort of postmenopausal patients with lymph-node negative breast cancer, randomized to adjuvant tamoxifen or control.

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Tissues are dynamic and complex biological systems composed of specialized cell types that interact with each other for proper biological function. To comprehensively characterize and understand the cell circuitry underlying biological processes within tissues, it is crucial to preserve their spatial information. Here we report a simple mounting technique to maximize the area of the tissue to be analyzed, encompassing the whole length of the murine gastrointestinal (GI) tract, from mouth to rectum.

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Selecting the most suitable alternative donor becomes challenging in severe aplastic anemia (SAA) when a matched sibling donor (MSD) is unavailable. We compared outcomes in patients with SAA undergoing stem cell transplantation (SCT) from matched unrelated donors (MUD) (n = 1106), mismatched unrelated donors (MMUD) (n = 340), and haploidentical donors (Haplo) (n = 206) registered in the European Society for Blood and Marrow Transplantation database (2012-2021). For Haplo SCT, only those receiving posttransplant cyclophosphamide for graft-versus-host disease (GVHD) prophylaxis were included.

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Background: No web-based interventions addressing sexual problems are available for young adult survivors of childhood cancer.

Aim: This study aimed to test the efficacy of a web-based psychoeducational intervention, Fex-Can Sex, to alleviate sexual problems in young adults treated for cancer during childhood.

Method: This randomized controlled trial tested the effects of a 12-week, self-help, web-based intervention.

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Pubertal testicular volume references for ruler, orchidometer, and ultrasonography measurements based on a longitudinal follow-up.

Andrology

November 2024

Institute of Biomedicine, Research Centre for Integrative Physiology and Pharmacology and Centre for Population Health Research, University of Turku, Turku, Finland.

Background: Testicular volume is a marker of male pubertal development. Various clinical conditions and their treatments may influence testicular growth.

Objectives: To create ruler-based age-dependent pubertal testicular volume references that enable calculation of standard deviation (SD) scores.

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Gender dysphoria and autism spectrum disorder (ASD) co-occur at high rates. Yet, it is unknown whether gender dysphoria and ASD are associated with common or distinct neurobiological correlates or how they relate to experiences of gender-related body incongruence. Using the Social Responsiveness Scale, we assessed autistic traits in 99 transgender and 99 cisgender individuals and investigated their associations with gender-related body incongruence, measured via a visually based "Body Morph" test, and with cortical thickness in the brain.

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Aims: Special histomorphological subtypes of colorectal low-grade intraepithelial neoplasia (LGIN) with variable prognostic impact were recently described in patients with inflammatory bowel disease (IBD) referred to as non-conventional dysplasia. However, they can also be found in patients without IBD. We aimed to analyse the reproducibility, frequency and prognostic impact of non-conventional colorectal LGIN in patients with and without IBD.

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Background: Immunohistochemical (IHC) PD-L1 expression is commonly employed as predictive biomarker for checkpoint inhibitors in triple-negative breast cancer (TNBC). However, IHC evaluation methods are non-uniform and further studies are needed to optimize clinical utility.

Methods: We compared the concordance, prognostic value and gene expression between PD-L1 IHC expression by SP142 immune cell (IC) score and 22C3 combined positive score (CPS; companion IHC diagnostic assays for atezolizumab and pembrolizumab, respectively) in a population-based cohort of 232 early-stage TNBC patients.

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Background/aim: It has been demonstrated that most routine biopsies from the colon and rectum display cross-cut crypts (CCC). The aim was to assess the number of CCC in microscopic isometric digital samples (0.500 mm) from routine colon biopsies.

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Background: Childhood cancer therapy may cause long-term effects. This cross-sectional study evaluated adulthood milestones in male childhood cancer survivors (CCS).

Methods: The study population comprised 252 male CCS with 6 to 42 years of survival diagnosed at the Children's Hospital in Helsinki (1964-2000) at the age of 0 to 17 years.

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Low-grade intestinal inflammation two decades after pelvic radiotherapy.

EBioMedicine

August 2023

Division of Clinical Cancer Epidemiology, Department of Oncology, Institute of Clinical Sciences, The Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden. Electronic address:

Background: Radiotherapy is effective in the treatment of cancer but also causes damage to non-cancerous tissue. Pelvic radiotherapy may produce chronic and debilitating bowel symptoms, yet the underlying pathophysiology is still undefined. Most notably, although pelvic radiotherapy causes an acute intestinal inflammation there is no consensus on whether the late-phase pathophysiology contains an inflammatory component or not.

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Background: Collection of real-world evidence (RWE) is important in achondroplasia. Development of a prospective, shared, international resource that follows the principles of findability, accessibility, interoperability, and reuse of digital assets, and that captures long-term, high-quality data, would improve understanding of the natural history of achondroplasia, quality of life, and related outcomes.

Methods: The Europe, Middle East, and Africa (EMEA) Achondroplasia Steering Committee comprises a multidisciplinary team of 17 clinical experts and 3 advocacy organization representatives.

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Background/aim: For many years, it was empirically estimated that the majority of the routine colon biopsies in Swedish patients with ulcerative colitis (UC), exhibited cross-cut crypts. The aim of the present study was to assess the frequency of cross-cut crypts (CCC) and well-oriented crypts in routine colon biopsies in German patients with UC.

Patients And Methods: In total, 447 colon biopsies: 376 with UC and 71 controls were investigated.

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