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Khanna S. Microbiota restoration therapy in infectious diseases. DRUG FUTURE 2017. [DOI: 10.1358/dof.2017.042.12.2736673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Wattal C, Oberoi JK, Goel N, Raveendran R, Khanna S. Matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS) for rapid identification of micro-organisms in the routine clinical microbiology laboratory. Eur J Clin Microbiol Infect Dis 2016; 36:807-812. [DOI: 10.1007/s10096-016-2864-9] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 12/01/2016] [Indexed: 11/24/2022]
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78
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Khanna S, Qureshi M, Ko N, Agarwal A, Rand A, Hirsch A. Disparities in Time From First to Second Treatment in Breast Cancer Patients at a Diverse Academic Medical Center. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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79
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Merino Lara T, Helou J, Poon I, Sahgal A, Chung H, Chu W, Soliman H, Verma S, Cheema P, Cheng S, Khanna S, Erler D, Zhang L, Cheung P. Stereotactic Body Radiation Therapy in Metastatic Non-Small Cell Lung Cancer: For Oligometastases, Oligoprogression, and Local Control. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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80
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Wadhwa A, AlNahhas MF, Dierkhising R, Patel R, Kashyap P, Pardi D, Khanna S, Grover M. High risk of post-infectious irritable bowel syndrome in patients with Clostridium difficile infection. Aliment Pharmacol Ther 2016; 44:576-82. [PMID: 27444134 PMCID: PMC4982831 DOI: 10.1111/apt.13737] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 04/24/2016] [Accepted: 06/29/2016] [Indexed: 01/16/2023]
Abstract
BACKGROUND Infectious enteritis is a commonly identified risk factor for irritable bowel syndrome (IBS). The incidence of Clostridium difficile infection (CDI) is on the rise. However, there is limited information on post-infectious IBS (PI-IBS) development following CDI and the host- and infection-related risk factors are not known. AIM To determine the incidence and risk factors for PI-IBS following CDI. METHODS A total of 684 cases of CDI identified from September 2012 to November 2013 were surveyed. Participants completed the Rome III IBS questionnaire and details on the CDI episode. Predictive modelling was done using logistic regression to evaluate risk factors for PI-IBS development. RESULTS A total of 315 CDI cases responded (46% response rate) and 205 were at-risk (no pre-CDI IBS) for PI-IBS development. A total of 52/205 (25%) met the Rome III criteria for IBS ≥6 months following CDI. IBS-mixed was most common followed by IBS-diarrhoea. In comparison to those without subsequent PI-IBS, greater percentage of PI-IBS patients had CDI symptoms >7 days, nausea, vomiting, abdominal pain during CDI, anxiety and a higher BMI. Using logistic regression, CDI symptoms >7 days [Odds ratio (OR): 2.96, P = 0.01], current anxiety (OR: 1.33, P < 0.0001) and a higher BMI (OR: 1.08, P = 0.004) were independently associated with PI-IBS development; blood in the stool during CDI was protective (OR: 0.44, P = 0.06). CONCLUSIONS In this cohort study, new-onset IBS is common after CDI. Longer CDI duration, current anxiety and higher BMI are associated with the diagnosis of C. difficile PI-IBS. This chronic sequela should be considered during active management and follow-up of patients with CDI.
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Khanna S, Thakur S, Kumar S, Mehta Y. Abstract PR303. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492700.72958.bf] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Khanna S, Sharma T, Das J, Mehta Y. Abstract PR440. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492828.20005.3e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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83
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Martinez Ugarte ML, Lightner AL, Colibaseanu D, Khanna S, Pardi DS, Dozois EJ, Mathis KL. Clostridium difficile infection after restorative proctocolectomy and ileal pouch anal anastomosis for ulcerative colitis. Colorectal Dis 2016; 18:O154-7. [PMID: 26945555 DOI: 10.1111/codi.13325] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2015] [Accepted: 02/05/2016] [Indexed: 02/08/2023]
Abstract
AIM Clostridium difficile infection (CDI) of the ileal pouch following restorative proctocolectomy (RPC) is becoming increasingly recognized. We aimed to understand better (i) the associated risk factors, (ii) treatment practices and (iii) the pouch diversion and failure rate in patients who developed CDI of the pouch after RPC for ulcerative colitis (UC). METHOD Patients who tested positive for C. difficile of the pouch between 2007 and 2010 were included in the analysis. Data collected included patient demographics, time from RPC to documented CDI, the treatment of CDI and rate of excision of the pouch. RESULTS Of 2785 patients recorded in the hospital CDI database, 15 had had an RPC with ileal pouch anal anastomosis. The median age was 44 years and the median interval from RPC to first documented episode of CDI was 3 years. Thirteen (81%) patients had had multiple episodes of pouchitis before and after CDI infection, and all were symptomatic at the time of testing for CDI. Within 30 days of the diagnosis of CDI, six (40%) patients were taking immunosuppressive medication, seven (47%) were taking a proton pump inhibitor and 12 (80%) had received antibiotics. Five patients required hospitalization for CDI and four had severe infections characterized by a serum creatinine more than 1.5 times baseline (n = 3) and a white cell count above 15 000 (n = 1). Six patients who underwent endoscopy had severe inflammation of the pouch including the presence of a pseudomembrane in one case. Ten patients were treated with metronidazole alone and five with vancomycin. Two patients had recurrent CDI of the pouch during a median follow-up period of 2.9 years and one had CDI refractory to medical management. This patient required diversion of the pouch with an ileostomy for refractory CDI but no patient required excision of the pouch. CONCLUSION All 15 patients developing CDI of the pouch were successfully treated with antibiotics and only one required surgery in the form of an ileostomy.
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Gupta A, Loftus EV, De Felice KM, Khanna S. Letter: cytomegalovirus colitis in a patient treated with ipilimumab for metastatic melanoma - authors' reply. Aliment Pharmacol Ther 2016; 43:176. [PMID: 26638940 DOI: 10.1111/apt.13467] [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: 12/08/2022]
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85
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Bima C, Zimmitti G, Ongaro R, Szichta N, Iuliani R, Rolfo G, Warren J, Carbonell A, Tran H, Tran M, Zajkowska M, Hawthorne W, Tantia O, Chaudhuri T, Khanna S, Cavalini WP, Loureiro M, Loi K, Darecchio A, Violi V, Bocchi P, Kukleta JF, Augenstein V, Huntington C, Cox T, Lopez R, Heniford BT, Akiyama G, Uematsu D, Yamamoto K, Sugihara T, Magishi A. Topic: Recent Innovations in Hernia Surgery. Hernia 2015; 19 Suppl 1:S375-8. [PMID: 26518858 DOI: 10.1007/bf03355403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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86
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Khanna S, Qureshi M, Agarwal A, Ahuja D, Hirsch A. Disparities in Time from Diagnosis to Treatment in Breast Cancer Patients at a Diverse Academic Medical Center. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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87
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Gupta A, De Felice KM, Loftus EV, Khanna S. Letter: anti-CTLA-4-associated colitis and inflammatory bowel disease pathogenesis--authors' reply. Aliment Pharmacol Ther 2015; 42:1032-3. [PMID: 26374261 DOI: 10.1111/apt.13373] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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88
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Gupta A, De Felice KM, Loftus EV, Khanna S. Systematic review: colitis associated with anti-CTLA-4 therapy. Aliment Pharmacol Ther 2015; 42:406-17. [PMID: 26079306 DOI: 10.1111/apt.13281] [Citation(s) in RCA: 188] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/11/2015] [Accepted: 05/27/2015] [Indexed: 02/06/2023]
Abstract
BACKGROUND Cytotoxic T-lymphocyte-associated protein-4 (CTLA-4) has an important role in T-cell regulation, proliferation and tolerance. Anti-CTLA-4 agents, such as ipilimumab and tremelimumab, have been shown to prolong overall survival in patients with metastatic melanoma, and their use is being investigated in the treatment of other malignancies. Their novel immunostimulatory mechanism, however, predisposes patients to immune-related adverse effects, of which gastrointestinal effects such as diarrhoea and colitis are the most common. AIMS To discuss the existing literature and summarise the epidemiology, pathogenesis and clinical features of anti-CTLA-4-associated colitis, and to present a management algorithm for it. METHODS We searched PubMed for studies published through October 2014 using the terms 'anti-CTLA,' 'ipilimumab,' 'tremelimumab,' 'colitis,' 'gastrointestinal,' 'immune-related adverse effect,' 'immunotherapy,' 'melanoma,' and 'diarrhoea.' RESULTS Watery diarrhoea is commonly associated with anti-CTLA-4 therapy (27-54%), and symptoms occur within a few days to weeks of therapy. Diffuse acute and chronic colitis are the most common findings on endoscopy (8-22%). Concomitant infectious causes of diarrhoea must be evaluated. Most cases may be successfully managed with discontinuation of anti-CTLA-4 and conservative therapy. Those with persistent grade 2 and grade 3/4 diarrhoea should undergo endoscopic evaluation and require corticosteroid therapy. Corticosteroid-resistant cases may respond to anti-tumour necrosis factor-alpha therapy such as infliximab. Surgery is reserved for patients with bowel perforation or failure of medical therapy. CONCLUSION Given the increasing use of anti-CTLA-4 therapy, clinicians must be aware of related adverse events and their management.
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Sasmal PK, Das PC, Tantia O, Patle N, Khanna S, Sen B. Acute small intestinal obstruction-an unusual complication of capsule endoscopy. Indian J Surg 2015; 77:21-3. [PMID: 25972632 DOI: 10.1007/s12262-014-1051-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2010] [Accepted: 03/29/2010] [Indexed: 10/25/2022] Open
Abstract
We report a case of endoscopic capsule impaction causing acute small intestinal obstruction in a patient with Crohn's disease (CD), having obscure gastrointestinal bleeding. A 57-year old female presented with features of acute small bowel obstruction 2 days after capsule endoscopy elsewhere for the evaluation of intermittent bleeding per rectum and iron deficiency anemia. Patient underwent an exploratory laparotomy with right hemicolectomy for the diseased ileocecal region which mimicked malignancy. The capsule was found to be impacted in the strictured lumen of the terminal ileum. Post operative histopathological examination revealed it to be Crohn's disease.
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Wattal C, Goel N, Khanna S, Byotra SP, Laxminarayan R, Easton A. Impact of informational feedback to clinicians on antibiotic-prescribing rates in a tertiary care hospital in Delhi. Indian J Med Microbiol 2015; 33:255-9. [DOI: 10.4103/0255-0857.153582] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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91
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Pardi DS, Shivashankar R, Khanna S, Baddour LM. Letter: clinical predictors of Clostridium difficile infection - advanced age and residential status are important factors for prediction and prevention - authors' reply. Aliment Pharmacol Ther 2015; 41:233. [PMID: 25511771 DOI: 10.1111/apt.13033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 10/30/2014] [Indexed: 12/08/2022]
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92
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Biswas AK, Jairath G, Mandal A, Khanna S. Non-traditional small poultry species: An approach to food sustainability. ACTA ACUST UNITED AC 2015. [DOI: 10.5958/0976-0741.2015.00017.3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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93
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Khanna S, Priya R, Bhartiya SK, Basu S, Shukla VK. Adrenal tumors: An experience of 10 years in a single surgical unit. Indian J Cancer 2015; 52:475-8. [DOI: 10.4103/0019-509x.176749] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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94
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Johnson DH, Khanna S, Smyrk TC, Loftus EV, Anderson KS, Mahoney DW, Ahlquist DA, Kisiel JB. Detection rate and outcome of colonic serrated epithelial changes in patients with ulcerative colitis or Crohn's colitis. Aliment Pharmacol Ther 2014; 39:1408-17. [PMID: 24779703 PMCID: PMC4894660 DOI: 10.1111/apt.12774] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 12/21/2013] [Accepted: 04/08/2014] [Indexed: 12/11/2022]
Abstract
BACKGROUND Chronic ulcerative colitis (CUC) and colonic Crohn's disease (CD) increase colorectal neoplasia (CRN) risk. While sessile serrated polyp (SSP) is a known cancer precursor, serrated epithelial changes (SEC) are of uncertain prevalence and neoplastic risk. AIM To assess the serrated lesion detection rates in CUC and CD and documented incidence of subsequent CRN in a retrospective, single-centre cohort study. METHODS Patients were identified by a central diagnostic index and pathology review confirmed SEC, SSP, CUC and CD diagnoses from 2006-12. Matched controls were identified from among all CUC and CD patients having colonoscopy during the second half of the time period. All were followed for incident CRN, estimated by the Kaplan-Meier method. RESULTS Between 2006 and 2012, 79 SEC and 10 SSP cases were identified. Detection rates were estimated to be 10/1000 and 2/1000 patients, for SEC and SSP respectively, among 4208 unique CUC or CD patients having colonoscopy from 2010-12. With only 10 cases, SSP patients were not further analysed. Cumulative incidence of subsequent CRN at 1 and 3 years was 12% (95% CI, 0-30%) and 30% (3-57%), respectively, in SEC patients compared to 4% (0-12%) and 9% (0-23%), respectively, in CUC or CD controls (P = 0.047, log-rank). However, this statistical difference was not significant after patients were stratified for history of prior or synchronous dysplasia (P = 0.09). CONCLUSIONS Serrated epithelial changes and sessile serrated polyps are uncommonly detected by colonoscopy in chronic ulcerative colitis and Crohn's disease patients. Histology with changes of serrated epithelium may be associated with risk of subsequent colorectal neoplasia, however further studies are needed to explore this relationship.
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Gupta H, Bansal R, Khanna S, Saxena S. An unusual complication of bortezomib therapy: Acute pancreatitis. Indian J Nephrol 2014; 24:135-6. [PMID: 24701056 PMCID: PMC3968610 DOI: 10.4103/0971-4065.127928] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Chaudhari M, Kumar R, Khanna A, Dalal D, Khanna S, Goyal J. Estimation of genetic trends for economic traits in crossbred cattle by using regression methods. INDIAN J ANIM RES 2014. [DOI: 10.5958/0976-0555.2014.00025.9] [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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97
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Lopresti ML, Edmiston KL, Oconnor A, Gates E, Vijayaraghavan G, Sood R, Khanna S. Abstract P2-04-04: Breast cancer risk reduction in high risk women identified at the time of screening mammography. Integrating data from an established high risk clinic. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p2-04-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: At the time of screening mammography, patient data can be collected and entered into a Modified Gail Model Risk Assessment Tool to identify patients at increased risk of invasive breast cancer. In turn, these patients can be referred to high risk centers where risk reduction strategies and chemoprophylaxis can be considered. The objective of this study is to establish how many women are at high risk of invasive breast cancer in a screening population who should be referred to a high risk center for counseling.
Methods: This is an observational prospective study evaluating 1,000 women at a single institution presenting for mammographic screening or diagnostic evaluation. At the time of mammography, these women routinely complete a standard intake questionnaire addressing breast cancer risk factors put forward by the institutional clinic. Modified Gail model risk scores were calculated from these data sheets. Women with a 5 year risk of invasive breast cancer of 1.7% or greater were identified as well as women at particularly high risk (≥3.4% or double the 5-year risk). At the time of analysis patients with a history of breast cancer or who underwent diagnostic mammography were excluded. Retrospective data from our institutional high risk clinic from January 2007 to December 2009 was analyzed in respect to patient age at referral, Gail Model Score, personal history of breast cancer, history of benign breast biopsies, and recommendation for and acceptance of chemoprophylaxis.
Results: Of 1,000 women screened in the prospective analysis, 366 had ≥1.7% 5-year risk of invasive breast cancer. 26% (96) of these women were under 60 years old while 74% (270) were ≥60 years old. Among the latter group, 19.6% (53) were found to have ≥ 3.4% of developing invasive cancer. In these women with double the 5-year risk, 96.2% had a family history of breast cancer and 69.8% had a prior biopsy. Similarly, in women under 60, greater than half were high risk secondary to a prior biopsy or family history. In the retrospective analysis of 600 patients evaluated in the high risk clinic, 38.8% were eligible for chemoprevention based on age >35, Gail model risk score, and no contraindications to treatment. 45.7% accepted recommendation for chemoprophylaxis as opposed 54.3% who had declined. Age was not found to be a predictor of acceptance of treatment.
Conclusions: 1/3 of patients who receive annual screening are at high risk for breast cancer. These patients can be identified from data routinely obtained at the time of screening mammography. These women should be referred for high-risk counseling and consideration of chemoprevention at the time of screening mammography. Further prospective studies may be warranted to determine if this is an effective way to provide risk reduction strategies for high risk women.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P2-04-04.
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Khanna S, Oberoi JK, Datta S, Aggarwal S, Wattal C. Variables affecting the performance of galactomannan assay in high-risk patients at a tertiary care centre in India. Indian J Med Microbiol 2013; 31:34-9. [PMID: 23508427 DOI: 10.4103/0255-0857.108717] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Diagnosis of invasive aspergillosis (IA) in immunocompromised patients using galactomannan ELISA (GM-ELISA) has shown variable sensitivity and specificity. OBJECTIVES To assess the diagnostic performance of GM-ELISA and analyze the effect of decreasing the cut off value, neutropenia, antifungals and piperacillin-tazobactam (PTZ). Prognostic value using 30 day all-cause mortality was also determined. MATERIALS AND METHODS Serum samples from 81 patients categorized into "proven," "probable," and "possible," categories based on revised EORTC/MSG definitions were tested by GM-ELISA. RESULTS Sensitivity of GM-ELISA in proven, probable and possible cases was 91.7%, 84.6% and 83.3% respectively. At an index cut-off value of 0.5 an increased sensitivity with minimal loss of specificity was observed. Use of antifungals demonstrated a decrease in sensitivity in proven and possible cases whereas it remained unaffected in probable category. Specificity increased from 75% to 100% with a positivity criterion of >2 consecutive samples. Although an increase in specificity was observed in patients not receiving PTZ, it was not statistically significant. Serial GM index values increased significantly in neutropenic patients and were associated with a poor prognosis. CONCLUSIONS GM-ELISA may be a useful diagnostic and prognostic modality for the detection of IA in high risk patients.
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Khanna S, Vij JC, Kumar A, Singal D, Tandon R. Dengue fever is a differential diagnosis in patients with fever and abdominal pain in an endemic area. ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY 2013; 98:757-60. [PMID: 15509430 DOI: 10.1179/000349804x3153] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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100
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Elmantaser M, McMillan M, Smith K, Khanna S, Chantler D, Panarelli M, Ahmed SF. A comparison of the effect of two types of vibration exercise on the endocrine and musculoskeletal system. JOURNAL OF MUSCULOSKELETAL & NEURONAL INTERACTIONS 2012; 12:144-154. [PMID: 22947546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Whole body vibration (WBV) is a novel training intervention but a comparison of different methods of WBV has rarely been performed. AIM To compare the short and medium term effects of two regimens of WBV on endocrine status, muscle function and markers of bone turnover. PATIENTS AND METHODS Over a period of 16 weeks, 10 men with a median age of 33 yrs (range, 29,49), were randomised to stand on the Galileo platform (GP) or Juvent1000 platform (JP) 3 times/wk. The total study duration was 16 weeks with measurements performed in a 4 week period of run-in, 8 weeks of WBV and a 4 week period of washout. These measurements included an assessment of anthropometry, body composition, muscle function and biochemical markers of endocrine status and bone turnover. To assess immediate effects of WBV, measurements were also performed at 60 mins before and 5, 30 and 60 mins after WBV. To assess immediate effects of WBV, measurements were also performed at 60 mins before and 5, 30 and 60 mins after WBV. RESULTS GP at 22 Hz was associated with an immediate increase in serum GH, rising from 0.07 μg/l (0.04,0.69) to 0.52 μg/l (0.06,2.4) (p=0.06), 0.63 μg/l (0.1,1.18) (p=0.03), 0.21 μg/l (0.07,0.65) (p=0.2) at 5 mins, 20 mins and 60 mins after WBV, respectively. An immediate effect was also observed in median serum cortisol which reduced from 316 nmol/l (247,442) before WBV to 173 nmol/l (123,245) (p=0.01),165 nmol/l (139,276) (p=0.02) and 198 nmol/l (106,294) (p=0.04) at 5 mins, 20 mins and 60 mins after WBV, respectively. Median serum CTX reduced significantly after 8 weeks of WBV training in the GP group from 0.42 ng/ml (0.29,0.90) pre-WBV to 0.29 ng/ml (0.18,0.44) at the end of WBV training (p=0.03). Over the 8 weeks, there was a reduction in median serum cortisol in the GP group from 333 nmol/l (242,445) (pre-WBV) to 270 nmol/l (115,323) (WBV) (p=0.04). None of the changes observed in the JP group reached statistical significance. Neither group showed any significant effect on muscle function, IGF-1, testosterone, leptin, CRP, creatine kinase, insulin or other markers of bone turnover. CONCLUSION WBV can stimulate GH secretion, reduce circulating cortisol and reduce bone resorption. These effects are independent of clear changes in muscle function and depend on the type of WBV that is administered.
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