Publications by authors named "Arkkila Perttu"

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.

View Article and Find Full Text PDF
Article Synopsis
  • Esophageal duplication cysts (EDCs) are rare congenital abnormalities often found incidentally during endoscopic or CT scans, and their diagnosis and surgical treatment are not well-documented.
  • A study involving 82 patients from 2001 to 2020 examined clinical and imaging data for those suspected of having EDCs, with 31 undergoing surgical treatment, to evaluate the effectiveness of endoscopic ultrasound (EUS) and CT scans.
  • Results showed that younger patients with larger lesions were more likely to have surgery, and both EUS and CT scans had a diagnosis accuracy of around 58%, indicating that neither method alone reliably distinguishes EDCs from other masses.
View Article and Find Full Text PDF

Imbalanced microbiota may contribute to the pathophysiology of irritable bowel syndrome (IBS), thus fecal microbiota transplantation (FMT) has been suggested as a potential treatment. Previous studies on the relationship between clinical improvement and microbiota after FMT have been inconclusive. In this study, we used 16S rRNA gene amplicon and shotgun metagenomics data from a randomized, placebo controlled FMT trial on 49 IBS patients to analyze changes after FMT in microbiota composition and its functional potential, and to identify connections between microbiota and patients' clinical outcome.

View Article and Find Full Text PDF
Article Synopsis
  • * The trial involved 48 patients with PD, examining the effects and safety of a single-dose FMT or a placebo, with key assessments done at 6 months.
  • * Results displayed no significant improvement in PD symptoms between FMT and placebo groups, with more gastrointestinal adverse events reported in the FMT group, while some secondary measures showed better outcomes in the placebo group.
View Article and Find Full Text PDF

Background: Tenofovir disoproxil fumarate (TDF) compared to tenofovir alafenamide (TAF) leads to lower body weight and plasma lipids by an unknown mechanism. We hypothesize that TDF, when absorbed, may damage enterocytes of the proximal duodenum, leading to reduced absorption of nutrients.

Methods: People living with HIV, without significant gastrointestinal symptoms, receiving TDF (n=12) or TAF (n=12) containing regimen underwent esophagogastroduodenoscopies with duodenal biopsies.

View Article and Find Full Text PDF

Background: A few prospective cohort studies support the safety of switching from intravenous to subcutaneous administration of vedolizumab during maintenance therapy in patients with inflammatory bowel disease. Real-life data on switching after intravenous induction therapy are lacking.

Objective: The aim was to obtain real-world data on subcutaneous vedolizumab treatment in patients with inflammatory bowel disease after switching from intravenous vedolizumab induction or maintenance therapy, and to evaluate treatment persistence, safety, and changes in disease activity and serum vedolizumab concentrations.

View Article and Find Full Text PDF

Background: While indirect comparison of infliximab (IFX) and vedolizumab (VDZ) in adults with Crohn's disease (CD) or ulcerative colitis (UC) shows that IFX has better effectiveness during induction, and comparable efficacy during maintenance treatment, comparative data specific to subcutaneous (SC) IFX (i.e., CT-P13 SC) versus VDZ are limited.

View Article and Find Full Text PDF

Altered microbiota and impaired host immune function have been linked to the pathogenesis of pouchitis. We used 16S rRNA gene sequencing and RNA sequencing data from a previous randomized clinical trial (RCT) on fecal microbiota transplantation (FMT) therapy in 26 chronic pouchitis patients with one-year follow-up. We analyzed changes in both luminal and mucosal microbiota composition, as well as in host mucosal gene expression to gain insights into the host-microbiota interactions possibly underlying clinical outcomes of the patients.

View Article and Find Full Text PDF

Fecal microbiota transplantation (FMT) has shown highly variable results in indications beyond recurrent infection. Microbiota dysbiosis in many diseases is characterized by the depletion of strictly anaerobic bacteria, which may be crucial for FMT efficacy. We developed a protocol to ensure anaerobic conditions during the entire transplant preparation and banking process, from material collection to administration.

View Article and Find Full Text PDF

Background & Aims: Pathologists quantify liver steatosis as the fraction of lipid droplet-containing hepatocytes out of all hepatocytes, whereas the magnetic resonance-determined proton density fat fraction (PDFF) reflects the tissue triacylglycerol concentration. We investigated the linearity, agreement, and correspondence thresholds between histological steatosis and PDFF across the full clinical spectrum of liver fat content associated with non-alcoholic fatty liver disease.

Methods: Using individual patient-level measurements, we conducted a systematic review and meta-analysis of studies comparing histological steatosis with PDFF determined by magnetic resonance spectroscopy or imaging in adults with suspected non-alcoholic fatty liver disease.

View Article and Find Full Text PDF

Objective: Subcutaneous (SC) infliximab (IFX) and vedolizumab (VDZ) have recently become available. We aimed to examine the impact of switching from intravenous (IV) to SC IFX and VDZ in patients with inflammatory bowel disease (IBD) on costs, the day hospital burden, trough levels, and clinical outcomes.

Methods: Our study comprised the cohort of IBD patients receiving IV IFX or VDZ at our hospital in 2022.

View Article and Find Full Text PDF

Background: Fecal microbial transplantation (FMT) is a promising new method for treating active ulcerative colitis (UC), but knowledge regarding FMT for quiescent UC is scarce.

Aim: To investigate FMT for the maintenance of remission in UC patients.

Methods: Forty-eight UC patients were randomized to receive a single-dose FMT or autologous transplant colonoscopy.

View Article and Find Full Text PDF

Background: Long-term Helicobacter pylori infection increases the risk of gastric malignancies. Since the symptoms for H. pylori gastritis, as well as for several malignancies, may be nonexisting or highly unspecific, even H.

View Article and Find Full Text PDF

Objective: To study gut microbiota before and 24 weeks after a single antiretroviral agent switch.

Design: HIV-positive patients with efavirenz (EFV) or a protease inhibitor (PI)-based antiretroviral therapy (ART) were randomized to switch EFV or PI to raltegravir (RAL group, n = 19) or to continue unchanged ART (EFV/PI group, n = 22). Age and weight-matched HIV-negative participants (n = 10) were included for comparison.

View Article and Find Full Text PDF

Importance: Severe obesity is a major health concern. However, a few patients remain resistant to bariatric surgery and other treatments. Animal studies suggest that weight may be altered by fecal microbiota transplantation (FMT) from a lean donor.

View Article and Find Full Text PDF

BACKGROUNDA pilot, single-center study showed that first-degree relatives of probands with nonalcoholic fatty liver disease (NAFLD) cirrhosis have a high risk of advanced fibrosis. We aimed to validate these findings using 2 independent cohorts from the US and Europe.METHODSThis prospective study included probands with NAFLD with advanced fibrosis, NAFLD without advanced fibrosis, and non-NAFLD, with at least 1 first-degree relative.

View Article and Find Full Text PDF

Background And Aims: There are limited comparative data for infliximab and vedolizumab in inflammatory bowel disease patients.

Methods: We conducted a systematic review and meta-analysis to compare the efficacy and safety of infliximab and vedolizumab in adult patients with moderate-to-severe Crohn's disease or ulcerative colitis.

Results: We identified six eligible Crohn's disease and seven eligible ulcerative colitis trials that randomised over 1900 participants per disease cohort to infliximab or vedolizumab.

View Article and Find Full Text PDF

Purpose: Anemia is common among patients with colorectal cancer and is associated with an increased risk of complications and poorer survival rate. The main objective of our study was to determine the effect of preoperative intravenous iron supplementation therapy on the need for red blood cell transfusions, other postoperative complications, and length of hospital stay in colon cancer patients undergoing colon resection.

Methods: In this retrospective cohort study, data were collected from medical records of all 549 colon carcinoma patients who underwent a colon resection in Helsinki University Hospital during the years 2017 and 2018.

View Article and Find Full Text PDF

Background: Faecal microbiota transplantation (FMT) is an emerging treatment modality, but its current clinical use and organisation are unknown. We aimed to describe the clinical use, conduct, and potential for FMT in Europe.

Methods: We invited all hospital-based FMT centres within the European Council member states to answer a web-based questionnaire covering their clinical activities, organisation, and regulation of FMT in 2019.

View Article and Find Full Text PDF

Integrase inhibitors appear to increase body weight, but paradoxically some data indicate that raltegravir (RAL) may decrease liver fat. Our objective was to study the effects of switching from a protease inhibitor (PI) or efavirenz (EFV) to RAL on liver fat, body composition, and metabolic parameters among people living with HIV (PLWH) with high risk for nonalcoholic fatty liver disease (NAFLD). We randomized overweight PLWH with signs of metabolic syndrome to switch a PI or EFV to RAL ( = 19) or to continue unchanged antiretroviral therapy (control,  = 24) for 24 weeks.

View Article and Find Full Text PDF

Background: Behavioral therapy (BT) has been proven effective in the treatment of supragastric belching (SGB) in open studies. The aim was to compare BT to follow-up without intervention in patients with SGB in a randomized study.

Methods: Forty-two patients were randomized to receive 5 sessions of BT, comprising diaphragmatic breathing exercises, or to follow-up without intervention.

View Article and Find Full Text PDF

Inflammatory bowel disease (IBD), once considered a disease of the Western hemisphere, has emerged as a global disease. As the disease prevalence is on a steady rise, management of IBD has come under the spotlight. 5-Aminosalicylates, corticosteroids, immunosuppressive agents and biologics are the backbone of treatment of IBD.

View Article and Find Full Text PDF

Background: In ulcerative colitis, a pouchitis is the most common long-term adverse effect after proctocolectomy and ileal pouch-anal anastomosis. Approximately 5% of patients develop chronic antibiotic-dependent or antibiotic-refractory pouchitis without any effective treatment. The aim of this trial was to investigate the efficacy and safety of fecal microbiota transplantation in the treatment of chronic pouchitis.

View Article and Find Full Text PDF