1.Identification of a high frequency of chromosomal rearrangements in the centromeric regions of prostate cancer patients
V. BALACHANDAR ; B. KUMAR LAKSHMAN ; K. SASIKALA ; P. MANIKANTAN ; R. SANGEETHA ; S. DEVI MOHANA
Journal of Zhejiang University. Science. B 2007;8(9):638-646
The aim of the present investigation was to study the major chromosomal aberrations (CA) like deletion, translocation,inversion and mosaic in prostate cancer patients of Tamilnadu, Southern India. Totally 45 blood samples were collected from various hospitals in Tamilnadu, Southern India. Equal numbers of normal healthy subjects were chosen after signing a consent form. Volunteers provided blood samples (5 ml) to establish leukocyte cultures. Cytogenetic studies were performed by using Giemsa-banding technique and finally the results were ensured by spectral karyotyping (SKY) technique. In the present investigation, major CA like deletion, translocation, inversion and mosaic were identified in experimental subjects. Results showed frequent CA in chromosomes 1, 3, 5, 6, 7, 9, 13, 16, 18 and X. In comparison with experimental subjects, the control subjects exhibited very low levels of major CA (P<0.05). In the present study, the high frequency of centromeric rearrangements indicates a potential role for mitotic irregularities associated with the centromere in prostate cancer tumorigenesis. Identification of chromosome alterations may be helpful in understanding the molecular basis of the disease in better manner.
2.Lowering Dietary Glycaemic Index through NutritionEducation among Malaysian Women with a History of Gestational Diabetes Mellitus
Sangeetha-Shyam ; Fatimah A ; Rohana AG ; Norasyikin AW ; Karuthan C ; Nik Shanita S ; Mohd Yusof BN ; Nor Azmi K
Malaysian Journal of Nutrition 2013;19(1):9-23
Introduction: Gestational diabetes mellitus (GDM) increases risks for type 2
diabetes and cardiovascular diseases. Low glycaemic index (GI) diets improve
cardio-metabolic outcomes in insulin-resistant individuals. We examined the
feasibility of lowering GI through GI-based-education among Asian post-GDM
women. Methods: A 3-month investigation was carried out on 60 Malaysian
women with a mean age of 31.0±4.5 years and a history of GDM. Subjects were
randomised into two groups: LGIE and CHDR. The CHDR group received
conventional healthy dietary recommendations only. The LGIE group received
GI based-education in addition to conventional healthy dietary recommendations.
At baseline and after 3-months, dietary intake of energy and macronutrient
intakes including GI diet and glycaemic load was assessed using 3-day food
records. Diabetes-Diet and GI-concept scores and physical activity levels were
assessed using a questionnaire. Adherence to dietary instructions was measured
at the end of 3 months. Results: At the end of 3 months, the LGIE group had
significant reductions in energy intake (241.7±522.4Kcal, P=0.037, ES=0.463), total
carbohydrate (48.7±83.5g, P=0.010, ES=0.583), GI (3.9±7.1, P=0.017, ES=0.549) and
GL (39.0±55.3, P=0.003, ES=0.705) and significant increases in protein (3.7±5.4g,
0.003, ES=0.685) and diet fibre (4.6±7.3g, P=0.06). The CHDR group had a significant
reduction in fat only (5.7±9.4g, P=0.006, ES=0.606). There was a 30% increase in
GI-concept scores in the LGIE group (p< 0.001). Changes in GI-concept scores
correlated significantly to the reduction in dietary GI (r = -0.642, P=0.045). Dietary
adherence was comparable in both groups. Conclusion: GI-education improves
GI-concept knowledge and helps lower dietary glycaemic index among women
with a history of GDM.
3.Effect of PDGF-B Gene-Activated Acellular Matrix and Mesenchymal Stem Cell Transplantation on Full Thickness Skin Burn Wound in Rat Model
Tamilmahan PARAMASIVAM ; Swapan Kumar MAITI ; Sangeetha PALAKKARA ; Rashmi ; Divya MOHAN ; H. V. MANJUNTHAACHAR ; K. KARTHIK ; Naveen KUMAR
Tissue Engineering and Regenerative Medicine 2021;18(2):235-251
BACKGROUND:
Full thickness burn wounds are lack of angiogenesis, cell migration, epithelialisation and finally scar tissue formation. Tissue engineered composite graft can provide sustained release of growth factor and promote the wound healing by cell migration, early angiogenesis and proliferation of extracellular matrix and wound remodeling. The objective of this study was to evaluate the gene embedded (pDNA-platelet-derived growth factor, PDGF-B) porcine acellular urinary bladder matrix with transfected mesenchymal stem cells (rBMSC) on healing of full thickness burn wound in rat model.
METHODS:
Full thickness burn wound of 2 9 2 cm size was created in dorsum of rat model under general anesthesia.Burn wounds were treated with silver sulfadiazine; porcine acellular urinary bladder matrix (PAUBM); PAUBM transfected with pDNA-PDGF-B; PAUBM seeded with rBMSC; PAUBM seeded with rBMSC transfected with pDNA-PDGF-B in groups A, B, C, D and E respectively. The wound healing was assessed based on clinical, macroscopically, immunologically, histopathological and RT-qPCR parameters.
RESULTS:
Wound was significantly healed in group E and group D with early extracellular matrix deposition, enhanced granulation tissue formation and early angiogenesis compared to all other groups. The immunologic response against porcine acellular matrix showed that PDGF-B gene activated matrix along with stem cell group showed less antibody titer against acellular matrix than other groups in all intervals. PDGF gene activated matrix releasing the PDGF-B and promote the healing of full thickness burn wound with neovascularization and neo tissue formation. PDGF gene also enhances secretion of other growth factors results in PDGF mediated regenerative activities. This was confirmed in RT-qPCR at various time intervals.
CONCLUSION
Gene activated matrix encoded for PDGF-B protein transfected stem cells have been clinically proven for early acceleration of angiogenesis and tissue regeneration in burn wounds in rat models.
4.Effect of PDGF-B Gene-Activated Acellular Matrix and Mesenchymal Stem Cell Transplantation on Full Thickness Skin Burn Wound in Rat Model
Tamilmahan PARAMASIVAM ; Swapan Kumar MAITI ; Sangeetha PALAKKARA ; Rashmi ; Divya MOHAN ; H. V. MANJUNTHAACHAR ; K. KARTHIK ; Naveen KUMAR
Tissue Engineering and Regenerative Medicine 2021;18(2):235-251
BACKGROUND:
Full thickness burn wounds are lack of angiogenesis, cell migration, epithelialisation and finally scar tissue formation. Tissue engineered composite graft can provide sustained release of growth factor and promote the wound healing by cell migration, early angiogenesis and proliferation of extracellular matrix and wound remodeling. The objective of this study was to evaluate the gene embedded (pDNA-platelet-derived growth factor, PDGF-B) porcine acellular urinary bladder matrix with transfected mesenchymal stem cells (rBMSC) on healing of full thickness burn wound in rat model.
METHODS:
Full thickness burn wound of 2 9 2 cm size was created in dorsum of rat model under general anesthesia.Burn wounds were treated with silver sulfadiazine; porcine acellular urinary bladder matrix (PAUBM); PAUBM transfected with pDNA-PDGF-B; PAUBM seeded with rBMSC; PAUBM seeded with rBMSC transfected with pDNA-PDGF-B in groups A, B, C, D and E respectively. The wound healing was assessed based on clinical, macroscopically, immunologically, histopathological and RT-qPCR parameters.
RESULTS:
Wound was significantly healed in group E and group D with early extracellular matrix deposition, enhanced granulation tissue formation and early angiogenesis compared to all other groups. The immunologic response against porcine acellular matrix showed that PDGF-B gene activated matrix along with stem cell group showed less antibody titer against acellular matrix than other groups in all intervals. PDGF gene activated matrix releasing the PDGF-B and promote the healing of full thickness burn wound with neovascularization and neo tissue formation. PDGF gene also enhances secretion of other growth factors results in PDGF mediated regenerative activities. This was confirmed in RT-qPCR at various time intervals.
CONCLUSION
Gene activated matrix encoded for PDGF-B protein transfected stem cells have been clinically proven for early acceleration of angiogenesis and tissue regeneration in burn wounds in rat models.
5.In silico screening of plant peptides against the envelope protein of dengue virus
Reena, G. ; Ranjani, R. ; Goutham, K.D. ; Sangeetha, K.
Tropical Biomedicine 2023;40(No.2):124-128
Peptide therapeutics are found to be an emerging and attractive class of treatment due to their highly
specific and safe nature. Hence twenty plant peptides were subjected to screening by molecular
docking against the envelope protein of the dengue virus using Clus Pro, Patch Dock, and HADDOCK
servers. Physicochemical parameters, allergenicity, and toxicity profile of the plant peptides were
estimated by Protparam analysis, AllergenFP, and ToxinPred web servers. Six potential compounds
namely Ginkbilobin, Cycloviolin-D, Circulin-B, Circulin-A, Cycloviolacin-013, and Circulin-C showed the
highest binding energy with both nonallergenic and nontoxic properties. They also exhibited desirable
half-lives extending to 30 hrs except for Ginkbilobin, which showed the least half-life of 4.4 hours and
non-polar activity. The residues of Ala-4 of Ginkbilobin; Arg-30 of Cycloviolin D; Arg-29 of Circulin A
and C interacted with the Try 101 of the domain II of Envelope protein, implying the possible inhibition
of the insertion process of the trimeric E protein during fusion with the host cells. Thus, the identified
plant peptides could serve as potential leads upon further subjection to in vitro studies.