Publications by authors named "Mohammad R Keramati"

Article Synopsis
  • Postoperative urinary dysfunction is a major issue for patients who have undergone rectal cancer surgery, and the effectiveness of pelvic floor muscle training (PFMT) in this context is still being evaluated.
  • A clinical trial with 79 patients demonstrated that starting Kegel exercises shortly after surgery resulted in notable improvements in urinary symptoms compared to standard care, with adherence linked to better outcomes and no adverse effects reported.
  • The study suggests that early Kegel exercises may help improve urinary function post-surgery, calling for further research to refine patient care approaches.
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Adult T-cell leukemia/lymphoma (ATL) is an aggressive malignancy with poor survival rates. The efficacy of radiotherapy in ATL needs enhancement with radiosensitizing agents. This study investigated whether umbelliprenin (UMB) could improve the therapeutic effects of ionizing radiation (IR) in ATL cells.

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Article Synopsis
  • Crohn's disease perianal fistulae often don't respond well to standard therapies, but mesenchymal stem cell (MSC)-derived exosomes have shown potential as a treatment, being deemed safe in previous studies.
  • A phase II clinical trial was conducted with 23 patients suffering from refractory perianal fistulas, where exosomes were injected directly into the fistula tracts over a period of 6 months.
  • Results indicated that 60% of patients achieved complete fistula closure, and overall, 69.7% of treated fistula tracts showed significant closure, along with some observed improvements in discharge from the tracts.
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Background: Rectal cancer is one of the most common cancers worldwide that imposes high costs on patients and the healthcare system while also having a significant impact on the patient's quality of life (QoL).

Aim: We aimed to assess the QoL of rectal cancer patients undergoing lower anterior resection (LAR) and evaluate potential confounding factors.

Methods: In this cross-sectional study, we included patients undergoing neo-adjuvant chemotherapy followed by LAR, diverting ileostomy, and adjuvant chemotherapy.

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Background: pathological complete response (pCR) is achieved in 10%-30% of rectal cancer patients following neoadjuvant chemoradiotherapy and surgery. Residual mucosal abnormalities, which make patients ineligible for nonoperative management, may not be an accurate indicator of the pCR. The purpose of this study was to report the gross findings of rectal cancer patients with pathological complete responses.

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Article Synopsis
  • Poor response to treatment with platelet and recombinant factor VII is a significant challenge in patients with Glanzmann Thrombasthenia (GT), and genetic variations in cytokines may contribute to this therapy resistance.
  • This study aimed to investigate the relationship between specific genetic polymorphisms in cytokine genes and treatment response in 30 GT patients compared to 100 healthy controls.
  • Results indicated that a specific IL-10 gene variant was more prevalent in resistant patients, and certain polymorphisms may influence therapy response and GT progression.
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Background: Low anterior resection in patients with rectal cancer may require a defunctioning loop ileostomy formation that requires closure after a period of time. There are three common techniques for ileostomy closure: anterior repair (AR or fold-over closure), resection and hand-sewn anastomosis (RHA), and resection and stapled anastomosis (RSA). We aimed to compare them on the basis of operative and postoperative features.

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Introduction: Colorectal cancer (CRC) surgery complications are a major issue affecting morbidity and mortality rates. Anastomotic stricture, which occurs in almost 30% of patients after surgery for rectal cancer, is one of the most serious but underreported side effects. In this study, we tried to assess the effect of stapler size on anastomotic stricture rate.

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Purpose: Bleeding is a leading cause of mortality and morbidity in the trauma and surgery field, using effective hemostatic agents can help us reduce bleeding especially in parenchymal hemorrhage. Nowadays polyvinyl alcohol (PVA) is known as a safe candidate for wound dressing and maybe a hemostatic agent. PVA-based hydrogel is a popular biocompatible material in the biomedical field especially when it has high water absorption.

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Background And Aims: The Hemorrhoidal Disease Symptom Score (HDSS) is a tool that is scored based on five main symptoms: pain, bleeding, itching, soiling, and prolapse. Furthermore, the Short Health Scale (SHS) is a measurement tool of subjective health and health-related quality of life. This study was performed to validate the Farsi-translated Hemorrhoidal Disease Symptom Score (HDSS), and Scale Short Health Scale adapted for hemorrhoidal disease (SHS-HD) as a measure of symptom severity in patients with hemorrhoid disease.

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Natural coumarins are valuable agents that induce anticancer effects and/or enhance sensitivity to therapeutic modalities. Galbanic acid (GBA), auraptene (AUR) and umbelliprenin (UMB) are coumarins derived from Ferula species with various pharmaceutical activities. The aim of the current research was to compare toxic effects of GBA, AUR, and UMB on human lymphoma cells in normoxia and hypoxia.

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Anastomotic leakage is one of the major complications of colorectal surgery, which might lead to reoperation, increased hospital stays, further intervention and mortality. Vacuum-assisted closure by devices such as Endo-SPONGE® produced by (B-Braun Medical B.V.

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Introduction: The effective treatment of anal fistulas almost always requires surgical intervention, which could be accompanied by post-operative complications, and affect the quality of life of patients. This study aimed to cross-culturally adapt the Persian version of the Quality of Life in patients with Anal Fistula questionnaire and evaluate its validity and reliability.

Materials And Methods: Sixty patients with a mean age of 44 years ranging from 21 to 72 years entered the study.

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Anastomosis is a standard technique following different conditions such as obstruction, tumor, and trauma. Obstruction, adhesion, or anastomosis leakage can be some of its complications. To improve healing and prevent postoperative complications, we design a hybrid scaffold containing acellular human amniotic membranes and polycaprolactone-molybdenum disulfide nanosheets for colon anastomosis.

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Introduction: The laparoscopic omentopexy has been described for the prevention of peritoneal dialysis catheter obstruction due to omental wrapping of the catheter. As there are some controversies and limited data regarding the outcomes of prophylactic omentopexy, we designed a study to evaluate the efficacy of prophylactic omentopexy in preventing catheter dysfunction in patients undergoing laparoscopic catheter placement.

Materials And Methods: In this randomized clinical trial, patients with end-stage renal disease during 3 months were divided into two groups of peritoneal dialysis catheter implants with and without omentopexy and subsequently evaluated regarding postoperative features.

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Background: The chimeric enzyme SETMAR (or Metnase) has been associated with several DNA processes, including DNA damage repair through the non-homologous joining pathway and suppression of chromosomal translocation in mouse fibroblasts. SETMAR overexpression has been reported in certain cancers suggesting that it might contribute to the establishment or progression of these cancers. In leukemia, the SETMAR gene transcript variants have not been widely studied.

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Article Synopsis
  • * Eleven patients with long-term fistulas received exosome injections, and after six months, most showed improvement, with several achieving complete resolution of their condition.
  • * The findings suggest that MSC-derived exosomes are safe and effective in treating complex perianal fistulas, highlighting their potential for future research and clinical use.
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Introduction: Several techniques have been proposed for the closure of loop ileostomy. This is the first study comparing bowel function and outcomes of two different hand-sewn surgical techniques used for the closure of diverting protective loop ileostomy.

Method: In this prospective, randomized, double-blind clinical trial, 40 patients with a history of rectal cancer, low anterior resection, and diverting loop ileostomy who were candidates for ileostomy reversal were included and randomly assigned into two groups, hand-sewn direct repair of the ileal defect (group A) and resection and hand-sewn anastomosis of the ileum (group B).

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Background: Exosome administration is a novel medical approach that promises excellent immunomodulatory properties without the conventional side effects of current antitumor necrosis factor drugs and stem cells. This study aimed to assess the safety and efficacy of using mesenchymal stem cell (MSC) exosomes to treat refractory fistulas in patients with inflammatory bowel disease.

Methods: MSCs were derived from the umbilical cords and their exosomes were isolated.

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The growing incidence of colorectal cancer around the world highlights the significance of tumor recurrence and patient survival as 2 key elements of patient therapy. We aimed to study the factors linked with disease recurrence and survival in colon cancer. Patients with colon cancer who underwent tumor excision as their primary treatment were enrolled in this prospective cohort and monitored for 10 years.

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The autophagy machinery is reported to be employed by Coronaviruses during their replication. Beclin-1 (BECN1) and protein 1 light chain 3 (LC3) are two key elements in the autophagy process, and their inhibition can prevent the replication of some coronaviruses in vitro. Here, we aimed to investigate the expression levels of Beclin-1 and LC3 in COVID-19 patients and healthy controls, hoping to find new therapeutic targets.

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Purpose: Retrorectal tumors (RTs) are rare tumors that arise in the space between the mesorectum and the pelvic wall and often originate in embryonic tissues. The primary treatment for these tumors is complete excision surgery, and choosing the best surgical approach is very important.

Methods: In this study, we retrospectively collected the data of 15 patients with RTs who underwent surgery in the surgical ward of Imam Khomeini Hospital in Tehran for 12 years to share our experiences of patients' treatment and compare different surgical approaches.

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Objectives: Adult T-cell leukemia/lymphoma (ATLL) is a blood neoplasm with specific geographic distribution. Although radiotherapy is a palliative treatment that provides long-term local control, single use of radiation leads to complications for patients. To introduce a novel multimodal approach against ATLL, we investigated combinatorial effects of 7-geranyloxycoumarin and radiation in vitro.

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The current surgical strategy for syndactyly is multistage operations in which every other web is released, leaving adjacent webs unoperated for the next stage to avoid a presumed possible digital vascular compromise. In this series, we present our experience with single-stage multiple syndactylies release. A total of 7 patients, including 2 patients with bilateral hand involvement, were included.

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