Displaying publications 301 - 320 of 1034 in total

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  1. Obesity depresses baroreflex control of renal sympathetic nerve activity and heart rate in Sprague Dawley rats: role of the renal innervation
    Khan SA, Sattar MZ, Abdullah NA, Rathore HA, Abdulla MH, Ahmad A, et al.
    Acta Physiol (Oxf), 2015 Jul;214(3):390-401.
    PMID: 25846561 DOI: 10.1111/apha.12499
    AIM:
    This study investigated the role of the renal innervation in arterial and cardiopulmonary baroreflex regulation of renal sympathetic nerve activity (RSNA) and heart rate (HR) in rats fed a high-fat diet to induce obesity.

    METHODS:
    Rats received either a normal (12% kcal) or high (45% kcal) fat diet for 60 days. On day 61, rats were anesthetized and prepared for recording left RSNA. In one group, the renal nerves remained intact, while in the other, both kidneys were denervated. Baroreflex gain curves for RSNA and HR were generated by increasing and decreasing blood pressure. Low-pressure baroreceptors were challenged by infusing a saline load.

    RESULTS:
    Mean blood pressure was 135 mmHg in the fat-fed and 105 mmHg (P < 0.05) in normal rats. Weight gain, adiposity index and creatinine clearance were 37, 82 and 55% higher (P < 0.05-0.001), but urine flow rate and fractional sodium excretions were 53 and 65% (both P < 0.001) lower, respectively, in the fat-fed compared to normal rats. In fat-fed rats with innervated kidneys, RSNA and HR arterial baroreflex sensitivities were reduced by 73 and 72% (both P < 0.05) but were normal in renally denervated rats. Volume expansion decreased RSNA by 66% (P < 0.001) in normal rats, but not in the intact fat-fed rats and by 51% (P < 0.01) in renally denervated fat-fed rats.

    CONCLUSION:
    Feeding a high-fat diet caused hypertension associated with dysregulation of the arterial and cardiopulmonary baroreflexes which was dependent on an intact renal innervation. This suggests that in obese states neural signals arising from the kidney contribute to a deranged autonomic control.

    KEYWORDS:
    baroreflex gain curves; cardiopulmonary reflex; high-fat diet
    Matched MeSH terms: Kidney/innervation; Kidney/physiopathology*
  2. 11Beta-hydroxysteroid dehydrogenase bioactivity is increased in the colon but not kidneys of rats given supplementary thyroxine
    Ruszymah BH, Zaiton Z, Aminuddin S, Khalid BA
    Exp. Clin. Endocrinol. Diabetes, 2001;109(4):227-30.
    PMID: 11453035
    The aim of this study was to investigate the effect of altered thyroid status on 11beta-hydroxysteroid dehydrogenase type 1 (11beta-HSD type 1) and type 2 (11beta-HSD type 2) bioactivity in rat kidney and colon. Male Sprague-Dawley rats (250 g) were treated with either L-thyroxine (T4) or propylthiouracil (PTU) for 4 weeks. Blood were then analysed for serum thyroxine, sodium (Na+) and potassium (K+). The kidneys and colon were assayed for 11beta-HSD type 1 and 11beta-HSD type 2 bioactivity. In T4 treated rats the serum thyroxine was significantly elevated (p<0.05) whilst PTU decreased serum thyroxine significantly (p<0.001) compared to controls. Serum Na+ and K+ were within normal limits. There were no significant changes in 11beta-HSD type 1 bioactivity in both treatment groups compared to controls. However, the 11beta-HSD type 2 bioactivity in rats given thyroxine was significantly higher in the colon (p<0.003) compared to controls. We conclude that altered thyroid status had no effect on 11beta-HSD type 1 bioactivity but 11beta-HSD type 2 bioactivity was elevated in the colon of rats given supplementary thyroxine.
    Matched MeSH terms: Kidney/drug effects*; Kidney/enzymology*
  3. An unusual rash and end-stage renal failure
    Tan HJ, Eadington D
    Hosp Med, 2001 Mar;62(3):176-7.
    PMID: 11291470
    Matched MeSH terms: Kidney Failure, Chronic/etiology*; Kidney Failure, Chronic/therapy
  4. Production of urokinase by HT 1080 human kidney cell line
    Roychoudhury PK, Gomes J, Bhattacharyay SK, Abdulah N
    Artif Cells Blood Substit Immobil Biotechnol, 1999 Sep-Nov;27(5-6):399-402.
    PMID: 10595439
    Studies were carried out in T-flasks and bioreactor to produce urokinase enzyme using HT 1080 human kidney cell line. While growing the cell line it has been observed that the lag phase is reduced considerably in the bioreactor as compared to T-flask culture. The HT 1080 cell adhesion rate and urokinase production were observed to be the function of serum concentration in the medium. The maximum urokinase activity of 3.1 x 10(-4) unit ml(-1) was achieved in the bioreactor at around 65 h of batch culture. Since HT 1080 is an anchorage dependent cell line, therefore, the hydrodynamic effects on the cell line were investigated.
    Matched MeSH terms: Kidney/cytology*; Kidney/secretion
  5. Rhabdomyolysis and acute renal failure following blowpipe dart poisoning
    Ho LM, Cheong I, Jalil HA
    Nephron, 1996;72(4):676-8.
    PMID: 8730441
    The latex of pokok ipoh (Antiaris toxocaria) and the root bark of akar ipoh (Strychnos species) have been the main sources of the poisonous principles in dart and arrow poisons prepared throughout south-east Asia. We report a fatal case of rhabdomyolysis and acute oliguric renal failure following oral ingestion of blowpipe dart poison. To our knowledge this is the first such report.
    Matched MeSH terms: Acute Kidney Injury/chemically induced*; Acute Kidney Injury/pathology
  6. Wilms' tumour in Malaysian children: a histopathological study of cases encountered at the University Hospital, Kuala Lumpur over a 22-year period
    Cheah PL, Looi LM, Lin HP
    Malays J Pathol, 1992 Dec;14(2):111-5.
    PMID: 1338998
    Formerly thought to have a constant incidence rate throughout the world, Wilms' tumour (nephroblastoma) has been shown to be less common among Asian children. A retrospective demographic and morphological study of Wilms' tumour histologically diagnosed over a 22-year period at the Department of Pathology, University Hospital, Kuala Lumpur was conducted to assess for inherent demographic and morphological differences between tumours in Malaysian children and those of Western populations. Thirty-seven cases of histologically proven Wilms' tumour qualified for inclusion in this study. 19 patients were Chinese, 13 Malay, 4 Indian and 1 Anglo-asian. 21 were male and 16 were female (M:F ratio = 1.3:1). Their ages ranged from 1 month to 4 years. 70.3% of the patients were below 2 years of age. 36 cases had unilateral and 1 bilateral tumours. Of unilateral tumours, 19 involved the left kidney and 17 the right. Histological assessment, based on criteria of the National Wilms' Tumor Study Group, revealed 20 (52.6%) tumours with a mixed pattern while 8 (21.1%) showed epithelial, 7 (18.4%) blastemal and 3 (7.8%) stromal-predominant patterns. Anaplasia was observed in only 2 tumours (5.3%). There was no obvious difference in age range and sex distribution, laterality of tumours and incidence of anaplasia between this and Western studies. No ethnic predilection was observed. A notably larger percentage of cases were below 2 years of age. Also, a larger proportion of epithelial-predominant and a lower proportion of blastemal-predominant tumours was observed compared with patterns reported from Western populations.
    Matched MeSH terms: Kidney Neoplasms/epidemiology; Kidney Neoplasms/pathology*
  7. Jering-induced acute renal failure with blue urine
    Yong M, Cheong I
    Trop Doct, 1995 Jan;25(1):31.
    PMID: 7886826 DOI: 10.1177/004947559502500110
    Matched MeSH terms: Acute Kidney Injury/etiology*; Acute Kidney Injury/urine*
  8. Clear cell sarcoma of kidney: a clinicopathological study of eight cases from Malaysia
    Cheah PL, Looi LM, Lin HP
    Histopathology, 1992 Oct;21(4):365-9.
    PMID: 1328018
    Eight cases of clear cell sarcoma of kidney were seen in the Department of Pathology, University Hospital, Kuala Lumpur, Malaysia over the 16-year period from 1973 to 1989. Five of the patients were males. Six patients were Malay, one Chinese and one Indian. The patients' ages ranged from 8 months to 3 years. Clear cell sarcoma was the original diagnosis in two patients while six were diagnosed as blastemal-predominant Wilms' tumours at presentation. Metastases developed in five patients. Metastatic sites included the thoracic vertebra, skull, orbit, humerus, radius, ulna, shoulder, lung and liver. The prolonged survival, of 9 years and 9 months, seen in one patient despite omission of Adriamycin (doxorubicin) from the chemotherapeutic protocol is highlighted. We also emphasise the histological factors which are of help in differentiating clear cell sarcoma from Wilms' tumour.
    Matched MeSH terms: Kidney Neoplasms/pathology*; Kidney Neoplasms/therapy
  9. Fulltext Retroperitoneal malignant fibrous histiocytoma with renal involvement
    Sim PH, Razack AH, Pathmanathan R, Jalleh RP
    Med J Malaysia, 1995 Jun;50(2):189-91.
    PMID: 7565195
    Malignant fibrous histiocytoma is a mesenchymal tumour which can involve the genitourinary organs primarily or by secondary extension. Both conditions are rare. We report four cases of retroperitoneal malignant fibrous histiocytoma involving the kidney by local extension. Diagnosis was difficult because of diverse, non-specific clinical features and may only be reached at operation or post mortem. Prognosis is poor. Although en bloc tumour resection with nephrectomy was possible in two patients, they returned with recurrences.
    Matched MeSH terms: Kidney/radiography*; Kidney/surgery
  10. The pattern of chronic renal failure in Kelantan, northeastern state of Malaysia
    Zainal D, Monniaty M, Nazmi N
    Southeast Asian J. Trop. Med. Public Health, 1995 Dec;26(4):781-4.
    PMID: 9139394
    The pattern and outcome of patients with chronic renal failure (CRF) in Kelantan, the northeastern state of Malaysia was determined. A total of 60 patients with CRF managed at the Hospital Universiti Sains Malaysia between January 1991 and June 1993 were reviewed retrospectively. The prevalence of CRF was 24.8 patients per year. The ratio of male to female patients was 1.5 : 1.0. Their mean age at presentation was 51.4 +/- 13.7 years. The cause of CRF in majority of our patients was unknown. Their mean blood urea and serum creatinine were 38.9 +/- 9.8 mmol/l and 1,154.9 +/- 458.7 mumol/l respectively. Sixty-five percent of our patients were already in end-stage renal failure (ESRF) at the time of presentation and only 53.8% of them could afford a definitive renal replacement therapy. Their mortality rate was 21.7% and majority of the death occurred in patients who were not receiving definitive renal replacement therapy. This debilitating course will continue unless the cost of renal replacement therapy is subsidised or a renal transplantation program is activated. Hence public education to encourage organ donation in this part of Malysia is necessary.
    Matched MeSH terms: Kidney Failure, Chronic/etiology*; Kidney Failure, Chronic/therapy*
  11. Surgical complications of living unrelated kidney transplantations in a Third-World country
    Lei C, Abdullah K, Morad Z, Suleiman AB
    Transplant Proc, 1992 Oct;24(5):1815.
    PMID: 1412860
    Matched MeSH terms: Kidney Transplantation/adverse effects*; Kidney Transplantation/mortality
  12. Fulltext Renal trauma: a local experience
    Mack POP, Ng HN
    Med J Malaysia, 1985 Dec;40(4):312-6.
    PMID: 3842731
    40 cases of major renal trauma over a period of five years in a peripheral hospital in Singapore were reviewed. 90% were due to blunt trauma with motor-cycle accidents forming the majority. There were five cases of superficial cortical injury, three cases of shattered kidneys, six cases of parenchymal injuries, one case of pedicle injury and one case of combined pedicle and parenchymal injury. Nephrectomy rate was 22.5% in this series. This is felt to be unduly high. Half of all the cases operated upon ended up with an immediate total nephrectomy. There was no mortality in this series. We recommend a more conservative policy of watchful waiting to achieve better chances of organ preservation without increasing mortality.
    Matched MeSH terms: Kidney/injuries*; Kidney/radiography
  13. Contribution of kinin system to the antihypertensive action of angiotensin converting enzyme inhibitors
    Sharma JN
    Adv Exp Med Biol, 1989;247A:197-205.
    PMID: 2690588
    Matched MeSH terms: Kidney/drug effects; Kidney/physiology
  14. In vitro estimation of non-specific and specific amino acid decarboxylase activities in guinea-pigs treated with chlorpromazine
    Ridzwan BH, Waton NG, Rozali BO, Jais AM, Maimun AH
    Comp Biochem Physiol C Comp Pharmacol Toxicol, 1990;97(2):247-50.
    PMID: 1982866
    1. In vitro studies of non-specific histidine decarboxylase activity was low or absent in control guinea-pigs and unchanged 9 or 27 hr after chlorpromazine (CPZ) injection intraperitoneally. 2. However, specific histidine decarboxylase activity was found in the control tissues and was increased 9 hr but not 27 hr after CPZ injection.
    Matched MeSH terms: Kidney/drug effects; Kidney/enzymology
  15. Urinary stones in Malaysia--its incidence and management
    Sreenevasan G
    Med J Malaysia, 1990 Jun;45(2):92-112.
    PMID: 2152025
    The life of Lord Moynihan is briefly reviewed. Incidence of stones in Peninsular Malaysia appears to show the same trend as in other industrialised countries. Management of urinary calculi both prior to and after the introduction of ESWL in a personal series is discussed. More than 90% of urinary stones are now treated by ESWL threatening the place of surgery in Urology. The pattern of incorporating renal transplantation into the urological training programme as practised in the Institute of Urology and Nephrology in Malaysia is suggested as a way to assure a place for surgery in Urology.
    Matched MeSH terms: Kidney Calculi/epidemiology; Kidney Calculi/therapy
  16. Histomorphological variations in systemic AA amyloidosis: clues of AA protein polymorphism
    Looi LM
    Histopathology, 1989 Feb;14(2):111-20.
    PMID: 2707747
    The histological location of amyloid within various organs in 25 cases of systemic AA amyloidosis was studied with a view to determine whether different morphological patterns exist in this category of amyloidosis. Although morphological variations due to progressive severity of disease were observed, there were appreciable variations in the patterns of amyloid deposition in the kidney and spleen that could not be simply explained on those grounds. Eleven (61%) of 18 kidneys examined showed severe glomerular involvement with mild degrees of vascular deposition while the remaining seven showed predominantly vascular involvement. The glomerular pattern appeared to be more ominous, being significantly associated with severe proteinuria or chronic renal failure. In nine (69%) of 13 spleens examined, amyloid was confined to the walls of small and medium-sized arteries while in the remaining four, vascular involvement was less severe and amyloid was deposited mainly along the reticulin of the white pulp. Possible explanations for these different patterns included resorption and redistribution of amyloid within the body during the course of the disease, and variation in tissue deposition as a manifestation of polymorphism of amyloid proteins. The latter appeared more feasible in view of the recent demonstration of SAA polymorphism and AA heterogeneity in man.
    Matched MeSH terms: Kidney Diseases/metabolism; Kidney Diseases/pathology
  17. Fulltext Molecular detection and characterisation of feline morbillivirus in domestic cats in Malaysia
    Mohd Isa NH, Selvarajah GT, Khor KH, Tan SW, Manoraj H, Omar NH, et al.
    Vet Microbiol, 2019 Sep;236:108382.
    PMID: 31500720 DOI: 10.1016/j.vetmic.2019.08.005
    Feline morbillivirus (FeMV), a novel virus from the family of Paramyxoviridae, was first identified in stray cat populations. The objectives of the current study were to (i) determine the molecular prevalence of FeMV in Malaysia; (ii) identify risk factors associated with FeMV infection; and (iii) characterise any FeMV isolates by phylogenetic analyses. Molecular analysis utilising nested RT-PCR assay targeting the L gene of FeMV performed on either urine, blood and/or kidney samples collected from 208 cats in this study revealed 82 (39.4%) positive cats. FeMV-positive samples were obtained from 63/124 (50.8%) urine and 20/25 (80.0%) kidneys while all blood samples were negative for FeMV. In addition, from the 35 cats that had more than one type of samples collected (blood and urine; blood and kidney; blood, urine and kidney), only one cat had FeMV RNA in the urine and kidney samples. Risk factors such as gender, presence of kidney-associated symptoms and cat source were also investigated. Male cats had a higher risk (p = 0.031) of FeMV infection than females. In addition, no significant association (p = 0.083) was observed between the presence of kidney-associated symptoms with FeMV status. From the 82 positive samples, FeMV RNA was detected from 48/82 (58.5%) pet cats and 34/126 (27.0%) shelter cats (p 
    Matched MeSH terms: Kidney Diseases/veterinary; Kidney Diseases/virology
  18. Fulltext Mobile Apps for the Care Management of Chronic Kidney and End-Stage Renal Diseases: Systematic Search in App Stores and Evaluation
    Siddique AB, Krebs M, Alvarez S, Greenspan I, Patel A, Kinsolving J, et al.
    JMIR Mhealth Uhealth, 2019 09 04;7(9):e12604.
    PMID: 31486408 DOI: 10.2196/12604
    BACKGROUND: Numerous free and low-cost mobile apps for the care management of kidney disease have become available in recent years. Although these appear to be promising tools, they have not been evaluated comparatively based on standard mobile app metrics, and thus, limited evidence is available regarding their efficacy. This study systematically cataloged and assessed mobile apps designed to assist medication compliance and nutrition tracking that are useful to the chronic kidney disease (CKD) and the end-stage renal disease (ESRD) patients who are on dialysis.

    OBJECTIVE: The objective of this study was to comprehensively evaluate mobile apps used for medication compliance and nutrition tracking for possible use by CKD and ESRD patients.

    METHODS: A systematic review framework was applied to the search, screening, and assessment of apps identified and downloaded from the iOS and Android app stores. We selected apps using 13 relevant search terms, narrowed down based on a set of inclusion and exclusion criteria, and then used the Mobile App Rating Scale (MARS), a widely adopted app evaluation tool to assess the effectiveness of apps. The internal consistency and interrater reliability were tested using Cronbach alpha and interclass correlation coefficients (ICCs), respectively.

    RESULTS: The MARS total score had excellent internal consistency (Cronbach alpha=.90) and a moderate level of interrater reliability (2-way mixed ICC 0.65). Overall, 11 out of the 12 reviewed apps met the minimum acceptable score of 3.0 in MARS rating. The 3 apps with the highest combined scores were My Kidneys, My Health Handbook (MARS=4.68); My Food Coach (MARS=4.48); and National Kidney Foundation Malaysia (MARS=4.20). The study identified 2 general weaknesses in the existing apps: the apps fell short of accommodating advanced interactive features such as providing motivational feedback and promoting family member and caregiver participations in the app utilization.

    CONCLUSIONS: The MARS rating system performed well in the app evaluation. The 3 highest ranked apps scored consistently high across the 5 dimensions specified in MARS. These apps were developed in collaboration with reputable organizations and field experts, demonstrating the importance of expert guidance in developing medical apps.

    Matched MeSH terms: Kidney Failure, Chronic/psychology; Kidney Failure, Chronic/therapy*
  19. Fulltext Mortality of leptospirosis associated acute kidney injury (LAKI) & predictors for its development in adults: A systematic review
    Al Hariri YK, Sulaiman SAS, Khan AH, Adnan AS, Al Ebrahem SQ
    J Infect Public Health, 2019 07 04;12(6):751-759.
    PMID: 31281106 DOI: 10.1016/j.jiph.2019.06.014
    Leptospirosis is the most widely spread zoonosis and Leptospirosis Associated Acute Kidney Injury (LAKI) is common and fatal if not properly and swiftly treated. The aim of this review is to evaluate the mortality of LAKI and to identify the risk factors for its development. An electronic search was performed to identify the studies included LAKI patients series. Only studies which investigated mortality or risk factors for LAKI development in adults were included. Twenty-three studies with 24 patients series were included in the final analysis and included 1698 patients. The median series mortality was 10.05% (range 0-33.3%) with a total of 223 death. Only four studies identified the independent risk factors for LAKI development which were oliguria, jaundice, arrhythmia, crackles, elevated direct bilirubin level, elevated activated prothrombin time, hyperbilirubinemia and leukocytosis. Although the mortality of LAKI is high, its predictors are not studied enough in literature.
    Matched MeSH terms: Acute Kidney Injury/mortality*; Acute Kidney Injury/pathology*
  20. Predicting points of departure for risk assessment based on in vitro cytotoxicity data and physiologically based kinetic (PBK) modeling: The case of kidney toxicity induced by aristolochic acid I
    Abdullah R, Alhusainy W, Woutersen J, Rietjens IM, Punt A
    Food Chem Toxicol, 2016 Jun;92:104-16.
    PMID: 27016491 DOI: 10.1016/j.fct.2016.03.017
    Aristolochic acids are naturally occurring nephrotoxins. This study aims to investigate whether physiologically based kinetic (PBK) model-based reverse dosimetry could convert in vitro concentration-response curves of aristolochic acid I (AAI) to in vivo dose response-curves for nephrotoxicity in rat, mouse and human. To achieve this extrapolation, PBK models were developed for AAI in these different species. Subsequently, concentration-response curves obtained from in vitro cytotoxicity models were translated to in vivo dose-response curves using PBK model-based reverse dosimetry. From the predicted in vivo dose-response curves, points of departure (PODs) for risk assessment could be derived. The PBK models elucidated species differences in the kinetics of AAI with the overall catalytic efficiency for metabolic conversion of AAI to aristolochic acid Ia (AAIa) being 2-fold higher for rat and 64-fold higher for mouse than human. Results show that the predicted PODs generally fall within the range of PODs derived from the available in vivo studies. This study provides proof of principle for a new method to predict a POD for in vivo nephrotoxicity by integrating in vitro toxicity testing with in silico PBK model-based reverse dosimetry.
    Matched MeSH terms: Kidney/drug effects*; Kidney/pathology
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