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Biomedical subjects

R K Nanda

Publications and source records attributed to R K Nanda.

At least 19 recordsLinked to original sources
PubMed2004

Prospects for hepatitis C vaccine.

Hepatitis C virus (HCV) is a major cause of chronic liver disease, cirrhosis and hepatocellular carcinoma worldwide. Unfortunately, neither a vaccine nor any effective therapy is available. Efforts are now directed towards the development of an effective vaccine besides chemotherapy. This review briefly summarizes the properties of an effective vaccine for the control of HCV infection. The mechanisms of protective immune response induced by HCV are not well understood. It is presumed that humoral and cellular immune responses play an important role. Even though there are various obstacles in the development of HCV vaccine, we describe a few promising approaches such as DNA vaccine, recombinant virus vaccine, HCV-like particles (HCV-LPs), peptide-based vaccine and plant-derived recombinant subunit vaccine.

Hepacivirus↗
PubMed2003

Blood coagulation factor VIII: An overview.

Factor VIII (FVIII) functions as a co-factor in the blood coagulation cascade for the proteolytic activation of factor X by factor IXa. Deficiency of FVIII causes hemophilia A, the most commonly inherited bleeding disorder. This review highlights current knowledge on selected aspects of FVIII in which both the scientist and the clinician should be interested.

Factor VIII↗
PubMed1999

Potential decreased morbidity of interstitial brachytherapy for gynecologic malignancies using laparoscopy: A pilot study.

OBJECTIVES: This pilot study was designed to prospectively assess whether the addition of laparoscopy at the time of interstitial brachytherapy is safe, provides verification and/or guidance of needle placement, and results in a reduction of treatment-related morbidity. METHODS: Between 7/93 and 2/97 15 consecutive eligible patients were entered into this study. All patients received external pelvic radiation to a dose range between 45 and 61.20 Gy using 1.8-Gy fractions. In each patient the minimum prescribed dose for the brachytherapy portion was 20 Gy. Minimum cumulative doses to sites of gross disease ranged from 71.8 to 115.3 Gy. A Syed-Neblett afterloading perineal template was used in all the procedures. Laparoscopy using established guidelines was performed during placement of interstitial needles. During template placement, verification of interstitial needles on laparoscopy and any subsequent changes or needle rearrangement were noted. RESULTS: No acute radiation toxicity greater than Grade 2 was noted during the external beam portion of treatment, and no perioperative complications were encountered. These needles were withdrawn under laparoscopic guidance to just below the peritoneal reflection, avoiding proximity to the bowel and improving tumor coverage. Median follow-up time was 26 months. No late radiation morbidity greater than Grade 2 nor any laparoscopic-related complications were noted. To date, one patient has died of disease; six are alive with disease; and eight are alive free of disease with a mean disease-free survival of 17.3 months. CONCLUSION: Laparoscopy at the time of interstitial brachytherapy appears to be safe. No radiation toxicity greater than Grade 2 has developed. No perioperative complications were seen with the addition of laparoscopy. The addition of laparoscopy to the placement of transperineal interstitial implants impacted needle arrangement and/or loading of sources in 50% of patients.

Adult↗
PubMed1998

Dosimetric aspects of small circular fields of 10 MV photon beam.

Dosimetric data obtained from different measurement techniques of 10 MV small circular photon beams of 12.5, 20, 30, and 40 mm diameter were studied. The effects of lack of lateral electronic equilibrium and steep dose gradient were noticed even when measurements were performed with a small volume (0.02 cc) ionization chamber. From an examination of the results, it is concluded that an average value of data obtained from several carefully performed film measurements may be used for routine radiosurgery.

Models, Structural↗
PubMed1978

Magnetic relaxation analysis of dynamic processes in macromolecules in the pico- to microsecond range.

A formalism based on the theory of Markov processes and suitable for the analysis of multiple internal motions in macromolecules is presented. Computer calculations of specific motional models for (13)C nuclear magnetic resonance (NMR) relaxation, treated as special cases of the proposed formalism, demonstrate the potential of this approach for discriminating between different motional models on the basis of NMR relaxation data.

Macromolecular Substances↗