Publications by authors named "Puustinen L"

Raloxifene has low bioavailability due to extensive glucuronidation in the intestine and the liver, and its pharmacokinetics is associated with high intra- and interindividual variability. Some of this variability could be explained by the enterohepatic recycling of raloxifene, which is driven by transporter-mediated uptake and efflux and gut microbial deglucuronidation of raloxifene glucuronides. These individual processes involved in raloxifene disposition, however, have not been characterized in full detail.

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Background: New tools are needed to determine the pancreatic cysts that require surgical resection. This study aimed to evaluate whether next-generation sequencing (NGS) is useful for identifying mucinous, malignant, or pre-malignant cysts leading to surgery.

Methods: Laboratory, cytological, and histological data from 97 patients with worrisome features on imaging or an unclear pancreatic cystic lesion (PCL) who were indicated for further investigation and who underwent endoscopic ultrasound (EUS) and fine-needle aspiration (FNA) between 2018 and 2022 were analyzed.

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Background & Aims: Validated prognostic tools for estimating short-term bile duct disease progression in primary sclerosing cholangitis (PSC) are lacking. We evaluated the predictive value of serum and biliary biochemistry for the progression of bile duct disease in PSC using repeated endoscopic retrograde cholangiopancreatography (ERCP) examinations to identify surrogate markers for more personalized surveillance.

Methods: We conducted a prospective analysis including patients with PSC who underwent ERCP for confirmation of diagnosis, monitoring of disease progression, or dysplasia surveillance.

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A resilient immune system is characterized by its capacity to respond appropriately to challenges, such as infections, and it is crucial in vaccine response. Here we report a paired randomized intervention-control trial in which we evaluated the effect of microbially rich soil on immune resilience and pneumococcal vaccine response. Twenty-five age and sex matched pairs of volunteers were randomized to intervention and control groups.

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Background And Aims: A new definition of dominant stricture (NDS) has recently been defined for patients with primary sclerosing cholangitis (PSC). Prevalence and clinical features of this, compared to traditional dominant stricture (TDS), have not been reported.

Methods: In this single-centre longitudinal prospective cohort study, all PSC patients who underwent endoscopic retrograde cholangiopancreatography (ERCP) between October 2021 and 2022 were recruited.

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Background: Gut dysbiosis and increased intestinal permeability have been reported to precede type 1 diabetes-related autoimmunity. The role of gut inflammation in autoimmunity is not understood.

Objectives: This study aimed to assess whether gut inflammation markers are associated with risk of islet autoimmunity and whether diet is associated with gut inflammation markers.

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Aims/hypothesis: Infection with coxsackie B viruses (CVBs) can cause diseases ranging from mild common cold-type symptoms to severe life-threatening conditions. CVB infections are considered to be prime candidates for environmental triggers of type 1 diabetes. This, together with the significant disease burden of acute CVB infections and their association with chronic diseases other than diabetes, has prompted the development of human CVB vaccines.

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Enteroviruses are a group of positive single-stranded viruses that belong to the Picornaviridae family. They regularly infect humans and cause symptoms ranging from the common cold and hand-foot-and-mouth disease to life-threatening conditions, such as dilated cardiomyopathy and poliomyelitis. Enteroviruses have also been associated with chronic immune-mediated diseases, such as type 1 diabetes, celiac disease, and asthma.

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Objectives: To study the effect of epilepsy on the risk of injury in children.

Methods: All first-born singleton children (n = 133055) born in 2001 - 2006 in Finland were included. Data was collected from national registers up to the first hospital-treated injury during the five years following the onset of epilepsy.

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Endoscopic retrograde cholangiopancreatography (ERCP) procedures may result in remarkable radiation doses to patients and staff. The aim of this prospective study was to determine occupational exposures in gastrointestinal endoscopy procedures, with a special emphasis on eye lens dose in ERCP. Altogether 604 fluoroscopy-guided procedures, of which 560 were ERCPs belonging to four American Society for Gastrointestinal Endoscopy procedural complexity levels, were performed using two fluoroscopy systems.

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Background & Aims: Nutrient status may affect the risk of microbial infections and play a role in modulating the immune response against such infections. The aim of this study was to determine whether serum 25-hydroxyvitamin D [25(OH)D] and serum fatty acids in infancy are associated with microbial infections by the age of 18 months.

Methods: Altogether 576 newborn infants from Trial to Reduce IDDM in the Genetically at Risk (TRIGR) born between 2002 and 2007 were included.

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The incidence of immune-mediated diseases (IMDs) is increasing rapidly in the developed countries constituting a huge medical, economic, and societal challenge. The exposome plays an important role since genetic factors cannot explain such a rapid change. In the Human Exposomic Determinants of Immune Mediated Diseases (HEDIMED) project, altogether 22 academic and industrial partners join their multidisciplinary forces to identify exposomic determinants that are driving the IMD epidemic.

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BACKGROUND : Motorized spiral enteroscopy (MSE) has been shown to be safe and effective for deep enteroscopy in studies performed at expert centers with limited numbers of patients without previous abdominal surgery. This study aimed to investigate the safety, efficacy, and learning curve associated with MSE in a real-life scenario, with the inclusion of patients after abdominal surgery and with altered anatomy. METHODS : Patients with indications for deep enteroscopy were enrolled in a prospective observational multicenter study.

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Enterovirus and adenovirus infections have been linked to the development of celiac disease. We evaluated this association in children who developed biopsy-proven celiac disease (N = 41) during prospective observation starting from birth, and in control children (N = 53) matched for the calendar time of birth, sex, and HLA-DQ genotype. Enterovirus and adenovirus infections were diagnosed by seroconversions in virus antibodies in longitudinally collected sera using EIA.

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Aim: Our aim was to compare the presence of various common viruses (rhinovirus, enterovirus, adenovirus, Epstein-Barr virus, cytomegalovirus, norovirus, parechovirus) in stool and nasal swab samples as well as virus-specific antibodies in serum samples between children who developed coeliac disease and controls.

Methods: A case-control study was established based on the DIABIMMUNE Study cohorts. During the study, eight Estonian children and 21 Finnish children aged 1.

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Background: Epidemiological studies of autoimmune hepatitis are scarce and often based on single centre registries.

Aims: We conducted a nationwide register study of incidence, prevalence, survival, and causes of death of autoimmune hepatitis patients in Finland.

Methods: Autoimmune hepatitis cases 1995-2015 were retrieved from the national database of special reimbursements for drugs costs.

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Background: Prenatal environment has been shown to influence child's risk of atopic diseases. Laboratory-confirmed data about the role of maternal infections during pregnancy is scarce.

Objective: The aim of this study was to determine the associations between serologically confirmed maternal infections during pregnancy and atopic disease in the offspring.

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Article Synopsis
  • Autoimmune type 1 diabetes (T1D) in kids is linked to enterovirus (EV) infections in pregnant mothers, particularly during the first trimester.
  • A study analyzed serum samples from mothers of children born between 2000-2007, finding that those who later developed T1D had more beta cell autoantibodies than matched control mothers.
  • Results suggest that the presence of EV-IgM in mothers may correlate with these autoantibodies, especially during the winter months, indicating a potential risk factor for T1D in their children.
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Purpose: To study liver P MRS, histology, transient elastography, and liver function tests in patients with virus C hepatitis (HCV) or autoimmune hepatitis (AIH) to test the hypothesis that P MR metabolic profile of these diseases differ.

Materials And Methods: 25 patients with HCV (n=12) or AIH (n=13) underwent proton decoupled P MRS spectroscopy performed on a 3.0T MR imager.

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Background: Liver biopsy is the gold standard in evaluating inflammation and fibrosis in autoimmune hepatitis.

Aims: In search of non-invasive follow-up tools in autoimmune hepatitis, we evaluated phosphorus magnetic resonance spectroscopy (P MRS).

Methods: Twelve consecutive AIH patients (mean age 42.

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Background: Autoimmune hepatitis (AIH) often recurs after liver transplantation (LT). Our aim was to evaluate the recurrence rate of AIH after LT, impact of AIH recurrence on survival and fibrosis progression, and find risk factors for AIH recurrence.

Methods: Forty-two patients with AIH prior to LT with ≥1 protocol biopsy ≥1 year post-LT were included with a median follow-up of 5.

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Article Synopsis
  • The study investigated the prognostic value of liver biopsy in 98 patients with autoimmune hepatitis from 1995-2012, focusing on factors predicting fibrosis progression and cirrhosis development.
  • Baseline histological findings indicated that 7% of patients were cirrhotic at diagnosis, with 42% experiencing fibrosis progression, and several histological features were identified as predictors.
  • The results showed that cumulative total inflammation and specific histological markers were significant risk factors for both fibrosis progression and cirrhosis development, highlighting the importance of liver histology in patient prognosis.
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Article Synopsis
  • Noroviruses (NoVs), particularly the GII.4 genotype, are the leading causes of gastroenteritis outbreaks in children, with new variants emerging every 2-3 years due to changes in the virus's P2 domain.
  • A study in Finland from 1998 to 2013 identified 829 GII.4 cases among 1495 NoV positive specimens, revealing twelve different variants, many of which were also found in global outbreaks.
  • The research suggests that GII.4 remains the dominant strain in Finland, highlighting the need for future vaccines to target specific variants or provide broader protection against multiple variants.
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Background: Patients with Crohn's disease are often investigated using MRI enteroclysis which may provide better visual quality than MRI enterography, but exposes patients to radiation. Only few data exist of the radiation dose used in fluoroscopy prior to MRI enteroclysis.

Subjects And Methods: During the 12-month study period, all 95 patients (40 men) undergoing MRI enteroclysis with nasojejunal intubation using fluoroscopy for suspicion or evaluation of Crohn's disease were included.

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Noroviruses are, after rotaviruses, the second most common cause of acute gastroenteritis in young children. In a prospective study conducted in 2009-2010 at the Tampere University Hospital, 195 stool specimens were collected from cases of acute gastroenteritis in children and examined for noroviruses, sapoviruses, and rotaviruses, using a reverse transcriptase polymerase chain reaction (RT-PCR). Noroviruses were found in 49 (25%) of the cases and sapoviruses in 12 (6%).

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