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Variant rs4149584 (R92Q) of the TNFRSF1A gene in patients with familial multiple sclerosis. Neurologia 2022:S2173-5808(22)00087-6. [PMID: 35963536 DOI: 10.1016/j.nrleng.2022.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Accepted: 07/15/2022] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION Genomic studies have identified numerous genetic variants associated with susceptibility to multiple sclerosis (MS); however, each one explains only a small percentage of the risk of developing the disease. These variants are located in genes involved in specific pathways, which supports the hypothesis that the risk of developing MS may be linked to alterations in these pathways, rather than in specific genes. We analyzed the role of the TNFRSF1A gene, which encodes one of the TNF-α receptors involved in a signaling pathway previously linked to autoimmune disease. METHODS We included 138 individuals from 23 families including at least 2 members with MS, and analyzed the presence of exonic variants of TNFRSF1A through whole-exome sequencing. We also conducted a functional study to analyze the pathogenic mechanism of variant rs4149584 (-g.6442643C > G, NM_001065.4:c.362 G > A, R92Q) by plasmid transfection into human oligodendroglioma (HOG) cells, which behave like oligodendrocyte lineage cells; protein labeling was used to locate the protein within cells. We also analyzed the ability of transfected HOG cells to proliferate and differentiate into oligodendrocytes. RESULTS Variant rs4149584 was found in 2 patients with MS (3.85%), one patient with another autoimmune disease (7.6%), and in 5 unaffected individuals (7.46%). The 2 patients with MS and variant rs4149584 were homozygous carriers and belonged to the same family, whereas the remaining individuals presented the variant in heterozygosis. The study of HOG cells transfected with the mutation showed that the protein does not reach the cell membrane, but rather accumulates in the cytoplasm, particularly in the endoplasmic reticulum and near the nucleus; this suggests that, in the cells presenting the mutation, TNFRSF1 does not act as a transmembrane protein, which may alter its signaling pathway. The study of cell proliferation and differentiation found that transfected cells continue to be able to differentiate into oligodendrocytes and are probably still capable of producing myelin, although they present a lower rate of proliferation than wild-type cells. CONCLUSIONS Variant rs4149584 is associated with risk of developing MS. We analyzed its functional role in oligodendrocyte lineage cells and found an association with MS in homozygous carriers. However, the associated molecular alterations do not influence the differentiation into oligodendrocytes; we were therefore unable to confirm whether this variant alone is pathogenic in MS, at least in heterozygosis.
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Efficacy of Postoperative Upper Gastrointestinal Series (UGI) and Computed Tomography (CT) Scan in Bariatric Surgery: a Meta-analysis on 7516 Patients. Obes Surg 2019. [PMID: 29516397 DOI: 10.1007/s11695-018-3172-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND To demonstrate the lack of utility and efficacy of routine early postoperative upper gastrointestinal study (UGI) in obese patients undergoing bariatric surgery and to show the higher efficacy of CT scan in cases of clinical suspicion of a leakage, a meta-analysis was performed. MATERIALS AND METHODS A literature search including articles published in last 18 years was performed. For both UGI and CT scan, sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) were calculated. A first analysis considered overall patients, and a second analysis considered only symptomatic patients. RESULTS Starting from 1233 eligible citations, 18 articles, including 7516 patients, were left. The pooled sensitivity was 54% for UGI (95% CI 34-74) with a high heterogeneity (I2 = 99.8%, p < .001), whereas CT scan showed a pooled sensitivity of 91% (95% CI 89-93) significantly higher than sensitivity of UGI series (p < 0.01), with a high heterogeneity (I2 = 98.9%, p < .001). In symptomatic patients the pooled sensitivity of UGI series was significantly lower than sensitivity of CT scan [49% (95% CI 31-68) vs 94% (95% CI 92-96), p < 0.01]. PPV showed a significant difference between UGI series and CT scan (54 vs 100%, p < 0.01). Specificity for UGI series was 98.6%, and specificity for CT scan was 99.7% (p = ns); the mean NPV was 96 and 98% for UGI series and CT scan (p = ns). CONCLUSIONS According to our results, a CT scan triggered by clinical suspicion must be considered the first-line procedure to detect a postoperative leak following primary sleeve gastrectomy or Roux-en-Y gastric bypass.
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Correction to: Acute acalculous cholecystitis determining Mirizzi syndrome: case report and literature review. BMC Surg 2018; 18:69. [PMID: 30165833 PMCID: PMC6117918 DOI: 10.1186/s12893-018-0404-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 08/23/2018] [Indexed: 11/10/2022] Open
Abstract
Following publication of the original article [1], the authors reported that one of the authors' names is spelled incorrectly.
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Results following laparoscopic sleeve gastrectomy in elderly obese patients: a single center experience with follow-up at three years. MINERVA CHIR 2018; 75:77-82. [PMID: 29963791 DOI: 10.23736/s0026-4733.18.07757-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Laparoscopic sleeve gastrectomy (LSG) represents the most performed bariatric surgical procedure worldwide. Morbid Overweight in elderly patients is becoming a significant health problem even in Italy. As well as in younger age groups, bariatric surgery could be indicated even in this subset of patients. However the advantages and results of LSG in patients over 60 years old have received minimal attention. METHODS The records of 375 patients underwent LSG between 2008 and 2016 were reviewed. In the entire series 18 patients were aged 60 years or older at the time of surgery. Since a 3 years follow-up was available for 12 patients out of the 18 aged over 60 we included in the study only these. General epidemiologic data, clinical findings, BMI and comorbidities surgical treatment and follow-up data were collected; postoperative measurements such as operative time, intraoperative complications, mortality rate, length of stay, incidence of early and late complications, Body mass Index (BMI), excess weight loss rate (EWL%) and comorbidities resolution were also recorded. RESULTS LSG was successfully performed for all geriatric patients. Global complications rate was 16.6% At 3 years mean BMI was 34.4±3.8 with a mean EWL% 66.1±31.9. Postoperative resolution of obesity comorbidities was observed; Hypertension (71.4%), type 2 Diabetes Mellitus (T2DM) (50.0%), obstructive sleep apnea syndrome (OSAS) (66.6%) respectively. No intraoperative complications or mortality were recorded. CONCLUSIONS LSG offered cure in geriatric patients affected by morbid obesity for weight loss and comorbidities resolution. Larger studies are necessary to analyze and minimize the incidence of postoperative complications associated to this surgical procedure in elderly patients.
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Acute complications following endoscopic intragastric balloon insertion for treatment of morbid obesity in elderly patients. A single center experience. MINERVA CHIR 2018; 75:72-76. [PMID: 29658677 DOI: 10.23736/s0026-4733.18.07712-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
BACKGROUND Obesity is a serious disease, with an increasing incidence also among subjects over 60 years old; surgical management has proven to be the most effective in the production of significant and durable weight loss. Intragastric balloon (IGB) treatment promotes a reduction of five to nine Body Mass Index (BMI) units in 6 months with an impressive improvement of obesity-associated comorbidities. METHODS Two hundred and twenty-five patients, 106 men (47.1%) and 119 women (52.9%), were evaluated at our institution to be submitted to a IGB positioning. Of these, 12 patients (8 women and 4 men) were more than 60 years old. For all patients BMI, comorbidities, weight loss and complications were recorded. χ2 test was used to evaluate differences in complications rate between elderly and other patients. RESULTS For the 12 elderly patients, we recorded a mean excess weight loss rate (EWL%) of 31.4. About complications, we recorded 2 severe esophagitis requiring IGB removal and 1 late gastric perforation. A higher complications rate was found in elderly population and the comparison with other patients revealed a significant difference (P<0.001). CONCLUSIONS Our results underline that IGB treatment in elderly patients is safe and effective in terms of weight loss and improvement in comorbidities. IGB can cause complications which, sometimes, can be severe such as esophageal damage and gastric perforation. For the management of complications, we highly recommend a close follow-up in all patients and a deepened instrumental study in every suspect case.
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Acute Leaks Following Laparoscopic Sleeve Gastrectomy: Early Surgical Repair According to a Management Algorithm. J Laparoendosc Adv Surg Tech A 2016; 26:85-91. [PMID: 26671482 DOI: 10.1089/lap.2015.0343] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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Retrieval of the gastric specimen following laparoscopic sleeve gastrectomy. Experience on 275 cases. Int J Surg 2015; 28 Suppl 1:S124-7. [PMID: 26708855 DOI: 10.1016/j.ijsu.2015.12.057] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 04/27/2015] [Accepted: 05/15/2015] [Indexed: 02/07/2023]
Abstract
Severe obesity leads to a high incidence of complications and a decrease in life expectancy, especially among younger adults. Laparoscopic sleeve gastrectomy (LSG) first intended as the first step of biliopancreatic diversion with duodenal switch is gaining a per-se procedure role because of its effectiveness on weight loss and comorbidity resolution. Different techniques have been described for specimen extraction in LSG. In this article we report the technique adopted in 275 LSGs performed in our department. In the first 120 LSGs performed from 2007, the specimen was extracted through a mini laparotomy. In the following 155 cases the technique has been simplified: the grasped specimen has been withdrawn through the 15 mm trocar site. We registered in the fist group six cases of wound infection (5%), ten cases of hematoma (8.3%) and four cases of port site hernia (3.3%). In the second group only one case of hematoma (0.6%, p = 0.01) but no cases of wound infection (p = 0.01) or port site hernia, (p = 0.03) although we registered a specimen perforation during retrieval in 16 patients, were reported. The technique described in the 155 cases of the control group has shown to be more effective than the technique we used in the case group, allowing significantly lower operative time (112.9 ± 1.0 vs 74.9 ± 9.1 p < 0.001) and complications, and providing unchanged costs.
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Great saphenous vein stripping and nerve injury: the role of stripping direction. INT ANGIOL 2015; 34:238-242. [PMID: 24945918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM Although saphenous nerve (SN) injury represents a complication of great saphenous vein (GSV) stripping, little is know about the techniques to minimize the risk of nerve injury. This is still controversial if the stripping direction could be related to the incidence of nerve injury. METHODS A prospective comparative study to compare upwards and downwards total GSV stripping during saphenectomy with regard to the occurrence of postoperative SN injury has been designed. Electroneurogram measurement and clinical identification of nerve injury have been performed 1 day before surgery, 1 week, 12 weeks and 1 year after surgery. RESULTS Although clinical evaluation of nerve injury was found to be similar among upwards and downwards stripping both at one and 12 weeks after surgery, ENG measurement showed a higher incidence of lesions after the downwards stripping both at one and 12 weeks after surgery. No clinical or ENG findings of nerve injury was found 1 year after surgery. CONCLUSION Upwards method is less traumatic than downwards total GSV stripping in terms of incidence of SN injury, as confirmed by electrophysiological nerve studies.
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Role of colonoscopy in the diagnostic work-up of bowel endometriosis. World J Gastroenterol 2015; 21:4997-5001. [PMID: 25945014 PMCID: PMC4408473 DOI: 10.3748/wjg.v21.i16.4997] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 12/20/2014] [Accepted: 02/12/2015] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the accuracy of colonoscopy for the prediction of intestinal involvement in deep pelvic endometriosis.
METHODS: This prospective observational study was performed between September 2011 and July 2014. Only women with both a clinical and imaging diagnosis of deep pelvic endometriosis were included. The study was approved by the local ethics committee and written informed consent was obtained in all cases. Both colonoscopy and laparoscopy were performed by expert surgeons with a high level of expertise with these techniques. Laparoscopy was performed within 4 wk of colonoscopic examination. All hypothetical colonoscopy findings (eccentric wall thickening with or without surface nodularities and polypoid lesions with or without surface nodularities of endometriosis) were compared with laparoscopic and histological findings. We calculated the sensitivity, specificity, positive predictive value and negative predictive value for the presence of colonoscopic findings of intestinal endometriosis.
RESULTS: A total of 174 consecutive women aged between 21-42 years with a diagnosis of deep pelvic endometriosis who underwent colonoscopy and surgical intervention were included in our analysis. In 76 of the women (43.6%), intestinal endometrial implants were found at surgery and histopathological examination. Specifically, 38 of the 76 lesions (50%) were characterized by the presence of serosal bowel nodules; 28 of the 76 lesions (36.8%) reached the muscularis layer; 8 of the 76 lesions (10.5%) reached the submucosa; and 2 of the 76 lesions (2.6%) reached the mucosa. Colonoscopic findings suggestive of intestinal endometriosis were detected in 7 of the 174 (4%) examinations. Colonoscopy failed to diagnose intestinal endometriosis in 70 of the 76 women (92.1%). A colonoscopic diagnosis of endometriosis was obtained in all cases of mucosal involvement, in 3 of 8 cases (37.5%) of submucosal involvement, in no cases of muscularis layer involvement and in 1 of 38 cases (2.6%) of serosa involvement. The sensitivity, specificity, positive predictive and negative predictive values of colonoscopy for the diagnosis of intestinal endometriosis were 7%, 98%, 85% and 58%, respectively.
CONCLUSION: Being an invasive procedure, colonoscopy should not be routinely performed in the diagnostic work-up of bowel endometriosis.
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Segmentectomy versus Lobectomy for Clinical Stage IA Lung Adenocarcinoma. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lipid profile changes in patients undergoing bariatric surgery: a comparative study between sleeve gastrectomy and mini-gastric bypass. Int J Surg 2015; 14:28-32. [PMID: 25576760 DOI: 10.1016/j.ijsu.2014.12.025] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Accepted: 12/24/2014] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To prospectively evaluate the effect of different types of bariatric surgery on lipid profile. METHODS Total cholesterol (TC), High-Density-Lipoprotein cholesterol (HDLc), Low-Density-Lipoprotein cholesterol (LDLc) and triglycerides (TG) levels were evaluated before surgery and at 3 different post-operative time-points (3, 6 and 12 months) in consecutive obese subjects undergoing mini-gastric bypass (MGB) or sleeve gastrectomy (SG). RESULTS At baseline, 74 MGB and 86 SG subjects were comparable for lipid profile and prevalence of hypercholesterolemia/hypertriglyceridemia. During the post-operative follow-up, both MGB and SG subjects showed significant changes in lipid profile. However, at 3 months, MGB patients showed higher changes in TC (β = 0.179, p = 0.022) and TG (β = 0.265, p = 0.001) than those undergoing SG. At 6-month post-operative follow-up, these differences were confirmed only for TC. After a 12-month follow-up, MGB and SG were entirely comparable for changes in lipid profile with the exception of HDLc, whose changes were higher in SG group (β = 0.130, p = 0.039). Overall, the probability to normalize lipid profile during the 12-month follow-up was similar in MGB and in SG patients (OR:1.24, 95%CI:0.41-3.76, p = 0.689). CONCLUSION Despites some differences at 3-6 post-operative months, during a 12-month follow-up, SG and MGB showed a similar efficacy in the improvement of lipid profile of obese patients.
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Bariatric surgery is not contraindicated in obese patients suffering from glycogen storage disease type IXa. A case report with follow-up at three years. Int J Surg Case Rep 2014; 5:686-8. [PMID: 25194605 PMCID: PMC4189068 DOI: 10.1016/j.ijscr.2014.06.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 05/17/2014] [Accepted: 06/15/2014] [Indexed: 11/29/2022] Open
Abstract
INTRODUCTION Glucose storage disease type IXa (GSD IXa) is an uncommon condition presenting with childhood onset hepatomegaly, growth retardation, and often, fasting ketosis and hypoglycemia. Despite its benign course, the lack of dietary counseling may favor uncontrolled weight gain. We investigated the efficacy of bariatric surgery in one 17 years old female suffering from GSD IXa and morbid obesity. PRESENTATION OF CASE The diagnosis was GSD type IXa in a patient with a body mass index (BMI) of 45.5 kg/m2. Onset of hypoglycemia was reported twice each month. She was treated her implanting an adjustable gastric banding through laparoscopy. Three years after surgery the patient presents a BMI of 30.1 kg/m2 and an excess of weight loss (EWL) of 71.1%. Only once, following surgery, she had to deflate her band to allow a faster transit of food through her stomach, thus reaching a prompt euglycemic condition, due to an incoming hypoglycemic crisis. DISCUSSION Laparoscopic adjustable gastric banding (LAGB) is one of the most used approaches to treat morbid obesity. It is a restrictive procedure unable to affect the absorption of any nutrient, presenting a very low intra and perioperative complication rate. In our GSD IXa patient, it offered a prompt modification of food intake restriction whenever requested, thus avoiding hypoglycemia. CONCLUSION LAGB is effective in determining weight loss without inducing significant side effects or worsening hypoglycemia, in this morbid obese patient, suffering from GSD type IXa.
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Laparoscopic sleeve gastrectomy: efficacy of fibrin sealant in reducing postoperative bleeding. A randomized controlled trial. Updates Surg 2014; 66:197-201. [PMID: 24961471 DOI: 10.1007/s13304-014-0257-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Accepted: 06/09/2014] [Indexed: 12/19/2022]
Abstract
Staple line leakage and bleeding are worrisome complications of laparoscopic sleeve gastrectomy (LSG). Solutions such as buttressing, oversewing or roofing the staple line with gelatin matrix have been proposed with controversial results. Because the use of fibrin sealant has shown a possible benefit in reducing the reoperation rate due to early complication in patients (pts) undergoing laparoscopic Roux-en-Y gastric bypass (LRYGBP), this solution has been tested in 100 consecutive pts undergoing LSG. A clinical trial has been performed on 100 consecutive pts. Exclusion criteria from the study were considered ASA IV pts, treated or untreated malignancies at any stage, steroids or FANS assumption, previous sovramesocolic surgery and conversion to open surgery. All pts were randomized to receive (group A, 50 pts) or to not receive (group B, 50 pts) 4 ml of human fibrin sealant (Tisseel™, Baxter(®) Deerfield, IL, USA) sprayed along the suture line. Primary endpoint was the incidence of postoperative complications: leaks, bleeding of the staple line or stenosis of the gastric remnant. Significance was assigned at a p level <0.05. By considering pts in group A vs. pts in group B our results shown no significant difference in fistulas or strictures occurrence (p = 0.2). Bleeding was significantly higher in patients not sprayed with sealant (group A vs. group B, 1/7, p = 0.03). This randomized trial has so far shown the use of fibrin sealant in LSG to significantly reduce postoperative bleeding. Although a trend in reducing leak occurrence emerges, it does not reach statistical significance.
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Wernicke encephalopathy in subjects undergoing restrictive weight loss surgery: a systematic review of literature data. EUROPEAN EATING DISORDERS REVIEW 2014; 22:223-9. [PMID: 24764323 DOI: 10.1002/erv.2292] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 03/24/2014] [Accepted: 03/30/2014] [Indexed: 12/14/2022]
Abstract
The use of weight loss surgery is progressively increasing, and in recent years, restrictive bariatric surgery procedures have been more often used. Although thought to be associated with a lower incidence of post-operative side effects than malabsorpitive surgery, some cases of micronutrients deficiency have been reported because of an acquired thiamine deficiency; in this clinical setting, some cases of Wernicke encephalopathy (WE) have been described. Major determinants and predictors of this major neurological complication are currently unknown. The aim of this systematic review was to analyse literature data in order to address this issue. The main result of our systematic review was that persistent vomiting is the major determinant of WE in patients undergoing restrictive weight loss surgery. In addition, early thiamine supplementation can rapidly improve the clinical conditions, avoiding permanent deficiencies. On the other hand, given the wide variability of clinical and demographic characteristics, definite prognostic factors of WE occurrence and of clinical outcome cannot be identified. In conclusion, although our results are suggestive, further ad hoc prospective studies evaluating changes in micronutrients levels according to different types of surgery are needed.
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Varicocele repair in severe oligozoospermia: A case report of post-operative azoospermia. World J Clin Cases 2014; 2:94-96. [PMID: 24749119 PMCID: PMC3985043 DOI: 10.12998/wjcc.v2.i4.94] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 02/10/2014] [Accepted: 02/20/2014] [Indexed: 02/05/2023] Open
Abstract
Varicocele has been implicated as a cause in 35%-50% of patients with primary infertility and up to 81% of men with secondary infertility. Although a large number of reports have shown improvement in the semen parameters after correction of varicocele, other studies have suggested no benefit. We report the first case of azoospermia after surgery in a young infertile male patient with left-sided varicocele and severe oligozoospermia undergoing laparoscopic varicocelectomy. A pregnancy was only achieved with assisted reproductive technology because semen cryopreservation was performed before surgery. In the light of the above, the deterioration of sperm count after varicocele repair in patients with severe oligozoospermia could be due to irreversible impairment of spermatogenesis of such patients, together with the possible temporary damage of the surgical repair. This possible complication could therefore turn the severe oligozoospermia into an indication to perform cryopreservation before surgery, on both clinical and medico-legal grounds. Further research is needed before drawing definitive conclusions regarding the management of varicocele-related severe oligozoospermia.
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An early onset of acute renal failure in a young woman with obesity and infertility who underwent gastric balloon positioning. A case report. G Chir 2014; 35:73-74. [PMID: 24841682 DOI: 10.11138/gchir/2014.35.3.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
INTRODUCTION Although intragastric balloons have been in use for several years to achieve weight reduction in obese patients, acute renal failure after gastric balloon positioning is reported in few studies CASE REPORT A 32-year-old white infertile woman undergone Bioenterics Intragastric Balloon (BIB) positioning in an attempt to weight loss and improve her fertility status. After only six days of persisting vomiting acute renal failure was found. A complete recovery of renal function was obtained after 14 days. CONCLUSION Acute renal failure was due to persistent vomiting leading to dehydration. Physicians involved in BIB patients management must consider the possibility of major complications in all hyperemetic subjects. BIB removal, with a concomitant intravenous fluid replacement and minerals or vitamins supplementation has to be taken into account as an emergency procedure.
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Lobe-specific mediastinal nodal dissection is sufficient during lobectomy by VATS or thoracotomy for early stage lung cancer. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Computed tomography findings of pneumatosis and portomesenteric venous gas in acute bowel ischemia. World J Gastroenterol 2013; 19:6579-6584. [PMID: 24151384 PMCID: PMC3801371 DOI: 10.3748/wjg.v19.i39.6579] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 04/02/2013] [Accepted: 05/19/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To use more representative sample size to evaluate whether computed tomography (CT) scan evidence of the concomitant presence of pneumatosis and portomesenteric venous gas is a predictor of transmural bowel necrosis.
METHODS: Data from 208 patients who were referred for a diagnosis of bowel ischemia were retrospectively reviewed. Only patients who underwent a surgical intervention following a diagnosis of bowel ischemia who also had a post-operative histological confirmation of such a diagnosis were included. Patients were split into two groups according to the presence of histological evidence of transmural bowel ischemia (case group) or partial bowel ischemia (control group). CT images were reviewed for findings of ischemia, including mural thickening, pneumatosis, bowel distension, portomesenteric venous gas and arterial or venous thrombi.
RESULTS: A total of 248 subjects who underwent surgery for bowel ischemia were identified. Among the 208 subjects enrolled in our study, transmural bowel necrosis was identified in 121 subjects (case group), and partial bowel necrosis was identified in 87 subjects (control group). Based on CT findings, including mural thickening, bowel distension, pneumatosis, pneumatosis plus portomesenteric venous gas and presence of thrombi or emboli, there were no significant differences between the case and control groups. The concomitant presence of pneumatosis and porto-mesenteric venous gas showed an odds ratio of 1.95 (95%CI: 0.491-7.775, P = 0.342) for the presence of transmural necrosis. The presence of pneumatosis plus porto-mesenteric venous gas exhibited good specificity (83%) but low sensitivity (17%) in the identification of transmural bowel infarction. Accordingly, the positive and negative predictive values were 60% and 17%, respectively.
CONCLUSION: Although pneumatosis plus porto-mesenteric venous gas is associated with bowel ischemia, we have demonstrated that their co-occurrence cannot be used as diagnostic signs of transmural necrosis.
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Bariatric surgery and diabetes remission: sleeve gastrectomy or mini-gastric bypass? World J Gastroenterol 2013; 19:6590-7. [PMID: 24151386 PMCID: PMC3801373 DOI: 10.3748/wjg.v19.i39.6590] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 07/29/2013] [Accepted: 08/05/2013] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the weight loss and glycemic control status [blood glucose, hemoglobin A1c (HbA1c) and hypoglycaemic treatment]. METHODS The primary risk factor for type 2 diabetes is obesity, and 90% of all patients with type 2 diabetes are overweight or obese. Although a remarkable effect of bariatric surgery is the profound and durable resolution of type 2 diabetes clinical manifestations, little is known about the difference among various weight loss surgical procedures on diabetes remission. Data from patients referred during a 3-year period (from January 2009 to December 2011) to the University of Naples "Federico II" diagnosed with obesity and diabetes were retrieved from a prospective database. The patients were split into two groups according to the surgical intervention performed [sleeve gastrectomy (SG) and mini-gastric bypass (MGB)]. Weight loss and glycemic control status (blood glucose, HbA1c and hypoglycaemic treatment) were evaluated. RESULTS A total of 53 subjects who underwent sleeve gastrectomy or mini-gastric bypass for obesity and diabetes were screened for the inclusion in this study. Of these, 4 subjects were excluded because of surgical complications, 7 subjects were omitted because young surgeons conducted the operations and 11 subjects were removed because of the lack of follow-up. Thirty-one obese patients were recruited for this study. A total of 15 subjects underwent SG (48.4%), and 16 underwent MGB (51.6%). After adjusting for various clinical and demographic characteristics in a multivariate logistic regression analysis, high hemoglobin A1c was determined to be a negative predictor of diabetes remission at 12 mo (OR = 0.366, 95%CI: 0.152-0.884). Using the same regression model, MGB showed a clear trend toward higher diabetes remission rates relative to SG (OR = 3.780, 95%CI: 0.961-14.872). CONCLUSION Although our results are encouraging regarding the effectiveness of mini-gastric bypass on diabetes remission, further studies are needed to provide definitive conclusions in selecting the ideal procedure for diabetes remission.
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Intradermal absorbable sutures to close pilonidal sinus wounds: a safe closure method? Surg Today 2013; 44:1638-42. [PMID: 24078028 DOI: 10.1007/s00595-013-0741-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 08/07/2013] [Indexed: 12/01/2022]
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The mini-gastric bypass in the management of morbid obesity in Prader-Willi syndrome: a viable option? J INVEST SURG 2013; 27:102-5. [PMID: 24063639 DOI: 10.3109/08941939.2013.832824] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AIMS To test the efficacy of the mini-gastric bypass (MGB) in the treatment of morbid obesity related to the Prader-Willi Syndrome (PWS). PATIENTS AND METHODS Three young male patients (mean age 15.6 years) complaining with PWS were treated by MGB with the aim to improve morbid obesity associated with the syndrome. Preoperative body mass index was 51 ± 4.13 kg/m(2). Two patients suffered from both hypertension and frequent sleep apnea crises. The mean preoperative level of fasting plasma acyl ghrelin was 1417.26 ± 289.37 pg/ml. All patients underwent a laparoscopic MGB. RESULTS The postoperative period was uneventful and all patients were discharged on the fifth postoperative day. The patients suffering from both hypertension and respiratory crises are now free from receiving any therapeutic support. When measured, the postoperative level of fasting plasma acyl ghrelin decreased to 675.5, 524.6, and 353.1 pg/ml, respectively. An excess weight loss of 79% has been recorded at two years so far. To date, no nutritional impairment, weight regain, or need for revision surgery has been recorded. CONCLUSION MGB appears to provide an effective weight reduction in patients suffering from PWS without determining significant nutritional impairment or weight regain. Larger studies are however required.
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Safety and Efficacy of Barbed Suture for Gastrointestinal Suture: A Prospective and Randomized Study on Obese Patients Undergoing Gastric Bypass. J Laparoendosc Adv Surg Tech A 2013; 23:756-9. [PMID: 23859743 DOI: 10.1089/lap.2013.0030] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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A vaginal drain of a pelvic abscess due to colonic diverticulitis. World J Clin Cases 2013; 1:82-83. [PMID: 24303472 PMCID: PMC3845936 DOI: 10.12998/wjcc.v1.i2.82] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Revised: 03/07/2013] [Accepted: 04/11/2013] [Indexed: 02/05/2023] Open
Abstract
Although well recognized for tubo-ovarian abscesses, we report, in our best knowledge, the first case of a vaginal drain of a pelvic abscess due to colonic diverticulitis. A 78-year-old patient presented with abdominal and pelvic pain, fever (39.3 °C) and an elevated white blood cell count (18500/mL). After abdominopelvic computed tomography the patient was presumed to have a pelvic abscess, which developed as a complication of the sigmoid diverticulitis. Due to the numerous intervening structures that create obstacles to safe percutaneous access, we planned a trans-vaginal drain. A rapid recovery was obtained within 2 d from the procedure and, at present, the follow-up was uneventful after 18 mo. We believe that transvaginal drain of pelvic abscess could be a useful alternative, when percutaneous approach is not feasible.
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Ultrasound-guided transversus abdominis plane block for retroperitoneal varicocele repair. Could it be an anesthesia method? Updates Surg 2013; 65:225-30. [PMID: 23619829 DOI: 10.1007/s13304-013-0211-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 04/16/2013] [Indexed: 10/26/2022]
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Outpatient inguinal hernia repair under local anaesthesia: feasibility and efficacy of ultrasound-guided transversus abdominis plane block. Hernia 2012; 17:749-55. [PMID: 23160979 DOI: 10.1007/s10029-012-1022-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Accepted: 11/05/2012] [Indexed: 02/07/2023]
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Ropivacaine infusion in diabetics subject with peripheral arterial disease. A prospective study. Exp Clin Endocrinol Diabetes 2012; 121:91-3. [PMID: 23147211 DOI: 10.1055/s-0032-1327757] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Peripheral arterial disease (PAD) predicts cardiovascular and cerebrovascular ischemic events. PAD treatment is aimed at reducing clinical symptoms, local tissue loss and at preventing complications. AIMS To evaluated the effect of peridural analgesia on peripheral perfusion and pain control. METHODS In 280 diabetic subjects with severe limb ischemia (65.7% males and 34.3% females, mean age 59.3±14.4 years) with a failure of medical treatment and contraindications to endovascular and/or surgical reperfusion, we performed a 30-day long peridural ropivacaine infusion, monitoring blood pressure, VAS and ABI periodically. RESULTS During ropivacaine infusion VAS significantly decreased (from 4.06±0.343 to 1.96±0.413, p<0.001). Furthermore, in the 261 (93.2%) subjects achieving a VAS value ≤2 during infusion, the effect was maintained after infusion withdrawing. ABI significantly improved both during infusion (from 0.30±0.04 at baseline to 0.65±0.05 at T30, p<0.001) and after infusion withdrawing as compared with baseline values. CONCLUSIONS 30-day peridural analgesia with ropivacaine is a valuable therapeutic option in severe peripheral limb ischemia subjects with contraindication to surgery and with pharmacological therapy failure.
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Ferguson hemorrhoidectomy: is still the gold standard treatment? Updates Surg 2012; 64:191-4. [PMID: 22488271 DOI: 10.1007/s13304-012-0155-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2012] [Accepted: 04/01/2012] [Indexed: 02/07/2023]
Abstract
Hemorrhoidectomy remains the most definitive procedure to treat symptomatic grades III and IV hemorrhoids. However, over the years, several modifications have been made to the original operation to improve the outcomes. A total of 693 consecutive patients with grade III and IV hemorrhoids underwent Ferguson hemorrhoidectomy. Our results serve as a standard for comparison conventional hemorrhoidectomy (Ferguson's technique) with recent methods such as stapled hemorrhoidopexy and LigaSure hemorrhoidectomy. We have obtained a very low rate of post-operative pain after Ferguson hemorrhoidectomy (VAS pain score was 2.47 ± 1.1 after a day, 1.34 ± 0.7 after 7 days and 0.51 ± 0.1 after 2 weeks) as to for stapler and LigaSure procedure in the literature. Moreover, long-term results demonstrate high levels of patient satisfaction (the satisfaction was good in 624 patients after 2 weeks and in 658 patients after 1 year) with a low recurrence rates (7 patients had recurrence after 1 year and 21 patients after 2 years). We believe that Ferguson-closed hemorrhoidectomy could still be, at the moment, the gold standard to which other techniques are compared.
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Recurrent varicose veins of the lower limbs after surgery. Role of surgical technique (stripping vs. CHIVA) and surgeon's experience. G Chir 2011; 32:460-463. [PMID: 22217371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Surgical treatment of varicose veins of the lower limbs resolves symptoms and improves quality of life. However, the high recurrence (20-80%) is a costly and complex issue. PATIENTS AND METHODS This is a retrospective review of 1489 patients with varicose vein of the lower limbs seen at our hospital between January 1980 and December 2005. The aim is to evaluate the effect of surgical technique (stripping vs. CHIVA) and surgeon's experience in reducing recurrences. RESULTS With experienced surgeons, CHIVA appears to be more effective than stripping in reducing the recurrence rate (p <0.05). However, when performed by an inexperienced surgeon the results are far worse than those achieved with stripping. CONCLUSION There was a clear reduction in recurrences at 5-10 years with CHIVA than with conventional stripping. However, if performed incorrectly, results are far worse with CHIVA. In fact, good results are far more difficult to achieve with CHIVA than with stripping, which is repeatable and easy to perform.
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Changes in exercise capacity induced by heart transplantation: prognostic and therapeutic implications. Scand J Med Sci Sports 2010; 21:519-25. [PMID: 20459480 DOI: 10.1111/j.1600-0838.2009.01065.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Survival and exercise performance are key targets of heart transplantation (HT). We designed this study to help in identifying (1) patients with chronic heart failure (CHF) at risk of poor exercise capacity after HT and (2) HT recipients presenting risk factors modifiable with exercise showing a potential impact on outcome. We enrolled 49 HT recipients (age 52 ± 12 years, 84% males) who underwent a cardiopulmonary exercise test before (9 ± 6 months) and after (20 ± 14 months) HT. In the CHF phase, lower peak oxygen consumption (VO(2) ) (odds ratio 0.69, P=0.017) independently predicted peak VO(2) improvement after HT. In the post-HT phase, body mass index (BMI) [adjusted hazard ratio (HR) 1.16, P=0.034] and VE (ventilation)/VCO(2) (carbon dioxide production) slope (adjusted HR 1.07, P=0.031) independently predicted mortality. In conclusion, CHF patients with only a moderate impairment of peak VO(2) are at a risk of failing to achieve a significant improvement of exercise performance after HT. In the post-HT phase, a BMI≥28 and/or a VE/VCO(2) slope ≥47 represent risk factors for death, which are potentially modifiable with exercise. Prospective randomized studies are needed to analyze the effects of training on functional capacity and outcome in the different subsets of HT recipients.
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Pro-atherothrombotic effects of leptin in human coronary endothelial cells. Thromb Haemost 2010; 103:1065-75. [PMID: 20174754 DOI: 10.1160/th09-06-0392] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Accepted: 12/30/2009] [Indexed: 11/05/2022]
Abstract
Adipocytes are nowadays recognised as cells able to produce and secrete a large variety of active substances termed adipokines, which exert direct effects on vascular cells. Among these adipokines, leptin has been proposed to play a role in the pathophysiology of acute coronary syndromes, as well as in increasing cardiovascular risk. At the moment, however, the mechanisms linking leptin to cardiovascular disease are not completely understood. This study investigates the effects of leptin, in a concentration range usually observed in the plasma of patients with increased cardiovascular risk or measurable in patients with acute coronary syndromes, on tissue factor (TF) and cellular adhesion molecules (CAMs) expression in human coronary endothelial cells (HCAECs). We demonstrate that leptin induces transcription of mRNA for TF and CAMs by real-time PCR. In addition, we show that this adipokine promotes surface expression of TF and CAMs that are functionally active since we observed increased procoagulant activity and leukocyte adhesion on cell surface. Leptin effects appear modulated by eNOS-production of oxygen free radicals through the activation of the transcription factor, nuclear factor(NF)-kappaB, since L-NAME, Superoxide Dismutase and NF-kappaB inhibitors suppressed CAMs and TF expression. Data of the present study, although in vitro , indicate that leptin may exert direct effects on human coronary endothelial cells by promoting CAMs and TF expression and support the hypothesis that this adipokines, besides being involved in the pathophysiology of obesity, might play a relevant role as an active mediator linking obesity to cardiovascular disease.
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Effects of exercise-based cardiac rehabilitation on high mobility group box-1 levels after acute myocardial infarction: rationale and design. J Cardiovasc Med (Hagerstown) 2009; 10:659-63. [DOI: 10.2459/jcm.0b013e32832d4979] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Different vascular response to concurrent implantation of sirolimus- and zotarolimus-eluting stents in the same vessel. Heart Vessels 2009; 24:313-6. [DOI: 10.1007/s00380-008-1134-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Accepted: 11/25/2008] [Indexed: 11/25/2022]
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Autonomic dysfunction is associated with high mobility group box-1 levels in patients after acute myocardial infarction. Atherosclerosis 2009; 208:280-4. [PMID: 19651408 DOI: 10.1016/j.atherosclerosis.2009.07.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2009] [Revised: 07/02/2009] [Accepted: 07/03/2009] [Indexed: 11/18/2022]
Abstract
BACKGROUND High mobility group box-1 (HMGB1) protein, a critical mediator of inflammatory processes, is a novel predictor of adverse post-infarction clinical outcomes, being involved in the healing process after MI. Heart rate recovery (HRR), a marker of autonomic function defined as the fall in heart rate during the first minute after exercise, is a powerful predictor of mortality in post-infarction patients. The present study was designed to test the hypothesis that HMGB1 is associated with autonomic dysfunction in post-infarction patients. METHODS Sixty-seven consecutive patients (mean age 59.3 years, 84% males) recovering from acute MI were included in the study protocol. All patients underwent Doppler-echocardiography, cardiopulmonary exercise and HMGB1 assay. RESULTS HMGB1 levels were inversely correlated with peak oxygen consumption (VO(2peak)) (r=-0.449, P<0.001), with left ventricular ejection fraction (LVEF) (r=-0.360, P=0.003), and with HRR (r=-0.387, P<0.001). In a linear regression analysis adjusted for multiple confounders, we found a significant inverse association between HMGB1 levels and HRR independent of age, gender, body mass index, VO(2peak), slope of increase in ventilation over carbon dioxide output (VE/VCO(2slope)), and presence of diabetes (beta=-0.377, P=0.034). CONCLUSIONS This study provided the first evidence for a significant association between increased HMGB1 levels and autonomic dysfunction expressed by post-exercise slower HRR in post-infarction patients. The prognostic implication of such association needs to be explored as well as whether HMGB1 could represent a valid marker for risk stratification either during the acute phase or long-term after MI.
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Abstract
The deleterious effects of cigarette smoke (CS) on cardiovascular morbidity and mortality are well established. Both active and passive smoking represent a major health hazard for both men and women. The great concerns related to the deleterious effects of CS on cardiovascular disease have been translated into various kinds of social interventions and targeted health policies since ever. The high health impact of cigarette smoking has driven a huge number of researches at the epidemiological, clinical and biological level. Nevertheless, even though many progresses have been made in understanding the mechanisms underlying the high disease burden associated to cigarette smoke, the exact components and the mechanisms by means of which it exerts its effects remain to be completely clarified as yet. The present paper reviews the main observations on the pathophysiology of smoke-related cardiovascular diseases, providing an up-to-date perspective about one of the main cardiovascular killers of our days.
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Abstract
Inflammation plays a key role in the initiation and progression of atherosclerosis but also in the pathophysiology of atheromatous plaque disruption and the development of acute coronary syndromes. Neopterin is a marker of inflammation and of immune system activation, it is synthesized by macrophages, that, once activated, release this substance. Indeed, in clinical evaluation of patients, measurements of plasma levels of neopterin are usually used to evaluate progression of viral infections, renal transplant rejection, severe systemic inflammatory diseases, nephritic syndrome and several autoimmune diseases. This mediator is able to induce a pro-atherothrombotic phenotype in cells of the coronary circulation. Recent data indicate that serum levels of neopterin are elevated in patients with coronary and peripheral artery disease and seem to be a prognostic marker for major adverse cardiovascular events. In particular, neopterin levels predict future major cardiac and vascular adverse events in patients presenting with chronic coronary artery disease, with acute coronary syndromes, and in those with critical limb ischemia. This renders this molecule a useful marker of atherosclerotic plaque activity, permitting the identification of the subjects at highest risk for major adverse cardiovascular events. In line with the above mentioned evidences, patients with high neopterin levels may require aggressive risk factor modification and intensive medical treatment irrespective of the severity of their coronary artery disease. This data suggest a potential clinical use of neopterin as a marker for disease activity in patients with cardiovascular disease.
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Pro-atherothrombotic effects of cigarette smoking in endothelial cells. Protective effects of statins. J Mol Cell Cardiol 2007. [DOI: 10.1016/j.yjmcc.2007.03.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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