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Biomedical subjects

M R Isa

Publications and source records attributed to M R Isa.

13 recordsLinked to original sources
PubMed2004

Tissue engineered human articular neocartilage using serial expanded chondrocytes.

Autologous cells are usually preferred in treating damaged tissue to avoid risks of immunological rejection and transmitting infectious diseases. Since only limited amount of tissue can be obtained without causing morbidity at the donor site, in vitro expansion of isolated cell is essential in order to acquire sufficient number of cells to reconstruct neocartilage. The aim of this study was to examine whether serial expanded chondrocytes can be use to generate neocartilage in vivo.

Adolescent↗
PubMed2004

In vitro development of autologous tissue engineered human articular neocartilage for orthopaedic surgery.

Treatment of articular cartilage lesions remains a clinical challenge. The uses of prosthetic joint replace allograft and/or autograft transplant carry a risk of complications due to infection, loosening of its component, immunological rejection and morbidity at the donor site. There has been an increasing interest in the management of cartilage damages, owing to the introduction of new therapeutic options. Tissue engineering as a method for tissue restoration begins to provide a potential alternative therapy for autologous grafts transplantations. We aimed to evaluate how well a tissue engineered neocartilage implant, consist of human articular chondrocytes cultured with the presence of autologous serum and mixed in a fresh fibrin derived from patient, would perform in subcutaneous implantation in athymic mice.

Animals↗
PubMed2004

Quality evaluation analysis of bioengineered human skin.

Our objective is to determine the quality of tissue engineered human skin via immunostaining, RT-PCR and electron microscopy (SEM and TEM). Culture-expanded human keratinocytes and fibroblasts were used to construct bilayer tissue-engineered skin. The in vitro skin construct was cultured for 5 days and implanted on the dorsum of athymic mice for 30 days. Immunostaining of the in vivo skin construct appeared positive for monoclonal mouse anti-human cytokeratin, anti-human involucrin and anti-human collagen type I. RT-PCR analysis revealed loss of the expression for keratin type 1, 10 and 5 and re-expression of keratin type 14, the marker for basal keratinocytes cells in normal skin. SEM showed fibroblasts proliferating in the 5 days in vitro skin. TEM of the in vivo skin construct showed an active fibrocyte cell secreting dense collagen fibrils. We have successfully constructed bilayer tissue engineered human skin that has similar features to normal human skin.

Animals↗
PubMed2004

Gene expression characteristic in human auricular cartilage tissue engineering.

This study was to assess collagen type II and collagen type I gene expression in tissue-engineered human auricular: cartilage formed via tissue engineering technique. Large-scale culture expansions were transformed into 3D in vitro construct and were implanted subcutaneously on the dorsal of athymic mice. After 8 weeks, explanted construct was processed in the same manner of native cartilage to facilitate cells for gene expression analysis. Isolated cells from in vivo construct demonstrated expression of type II collagen gene comparable to native cartilage. This study verified that tissue-engineered auricular cartilage expressed cartilage specific gene, collagen type II after in vivo maturation.

Actins↗
PubMed2004

Formation of tissue-engineered human auricular cartilage via tissue engineering technique for future use in ear surgery.

To date there is no optimal approach to reconstruct an external ear. However, advances in tissue engineering technologies have indicated that in vitro autologous elastic cartilage might be of great importance in the future treatment of these patients. The aim of this study was to observe monolayer expansion of auricular cartilage and to evaluate engineered cartilage using standard histochemical study.

Cartilage↗
PubMed1999

A successful pregnancy outcome in treated vulval rhabdomyosarcoma.

A 14 year old girl presented in 1986 with a huge perineal swelling which was progressively increasing in size and associated with loss of weight and loss of appetite. Biopsy from the mass revealed rhabdomyosarcoma of the vulva. She was treated with chemotherapy and radium implant. She responded well to the regime. Fibrosis of the vulva and vagina caused difficulty in consummation. Once it was corrected, she conceived easily and proceeded to a normal pregnancy and delivery.

Adolescent↗
PubMed1996

A report of the first three cases of diffuse panbronchiolitis in Malaysia.

Three cases of diffuse panbronchiolitis (DPB) occurring in two Malaysian Chinese patients and one Malay patient are reported. They had similar clinical, radiological and physiological features which are characteristic of DPB. The diagnosis in one of the cases was confirmed histologically by transbronchial lung biopsy. These could be the first three cases identified in Malaysia.

Adult↗
PubMed1994

Idiopathic pulmonary haemosiderosis occurring in a Malaysian patient.

A young East Malaysian lady presented with haemoptysis in 1989. Since then she had recurrent episodes of dyspnoea and two occasions of respiratory failure requiring assisted ventilation. An open lung biopsy showed intra-alveolar haemorrhage with diffuse interstitial fibrosis consistent with idiopathic pulmonary haemosiderosis after excluding secondary causes of pulmonary haemorrhage. She failed to respond to corticosteroid and continued to depend on oxygen until she succumbed to the illness 2 years after the presentation.

Adolescent↗
PubMed1994

Continent pouch ileostomy.

Continent pouch ileostomy is fashioned for patients who need a proctocolectomy. It is usually indicated for cases of ulcerative colitis and familial adenomatous polyposis where the anal sphincter can no longer maintain normal function or has to be removed. A case of familial adenomatous polyposis with features of Gardner's syndrome is reported. The patient presented with carcinoma of the rectum. Abdominoperineal resection followed by completion pancolectomy was performed. A continent pouch ileostomy was fashioned for him. He resumed work as a labourer within six months. The pouch was troublefree, needed to emptied four to six times a day and was fully continent of fluid, flatus and faeces until his demise three years later from liver secondaries. Continent pouch ileostomy is a better alternative than permanent end ileostomy. All care should be taken to rule out the existence of Crohn's disease. It is proposed that continent pouch ileostomy should be offered to patients needing permanent ileostomy if the expertise is available.

Adenocarcinoma↗
PubMed1993

Lymphangioleiomyomatosis with chylous ascites.

A 41-year-old Malay housewife presented with recurrent chylous ascites and progressive cachexia over 17 years. A diagnosis of lymphangioleiomyomatosis (LAM) was established by laparotomy where biopsy of the liver, peritoneum and adhesions from previous surgery showed smooth muscle proliferation in the blood vessels and lymphatics. Clinically and radiologically, there was no evidence of pulmonary involvement. She was treated with dietary fat restriction and medium-chain triglycerides. This is the first case of LAM reported in Malaysia.

Adult↗
PubMed1992

Evaluation of therapies in the treatment of Helicobacter pylori associated non-ulcer dyspepsia.

This randomised double blind placebo controlled study evaluated the effectiveness of colloidal bismuth subcitrate (CBS), ampicillin and their combination in the treatment of Helicobacter Pylori in non-ulcer dyspepsia (NUD) and assessed if elimination of this organism is associated with improvement of gastritis and the symptoms. Forty-eight NUD patients with H. pylori and histologic gastritis were randomly allocated to one of the three regimens for 28 days. Symptoms were assessed before and after treatment. Forty-three patients completed the trial. Repeat endoscopy within 48 hours of completing treatment showed suppression of H. pylori in 6 of 7 patients (85.7%) on combined therapy and one of 8 patients (12.5%) on CBS therapy (p = 0.0205). There was no suppression of the bacteria in patients treated with ampicillin. Repeat endoscopy performed 2 weeks after completing treatment showed suppression of H. pylori in 3 of 7 patients (42.9%) on combined therapy and none in the other two groups. Patients on combined therapy who had suppression of H. pylori, 48 hours or 2 weeks after completing treatment were noted to have historical improvement of their gastritis (p = 0.0001 and p = 0.05 respectively). This was also associated with improvement of symptoms in these patients.

Adolescent↗