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Nathan Goodyear

Oxidative Stress and Its Relationship With Adenosine Deaminase Activity in Various Stag... - 0 views

  • Reduced SOD activity might be responsible for excessive accumulation of superoxide anions leading to increased free radical mediated injury. Increased free radical production has been shown to be responsible for chromosomal damage leading to mutagenecity, cell proliferation and carcinogenesis. SOD activity showed marked improvement after mastectomy indicating the lowering of oxidative stress.
  • The increased production of reactive oxygen species causes oxidative stress leading to cell proliferation and hence increased inflammatory conditions
  • Superoxide dismutase is an important antioxidant enzyme which decomposes the harmful superoxide anions into hydrogen peroxide thus protects the body from the action of free radicals
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  • Females suffering from breast cancer had significantly decreased Superoxide dismutase (SOD) and reduced glutathione (GSH) levels in comparison to normal females
  • ADA seems to be a promising marker of inflammation in breast cancer thereby suggesting that it can be used as a diagnostic tool to detect the stage of breast cancer along with cytopathological studies
  • In conclusion, our study confirmed the role of oxidative stress in the pathogenesis of breast cancer.
  • Another potent antioxidant molecule is reduced glutathione. It acts as reductant which converts hydrogen peroxide into water and reduces lipid peroxidation products into their corresponding alcohols and thus mediates protective action.
  • In the present study, significantly low SOD activity has been observed in female patients suffering from carcinoma breast both pre as well as post operative in comparison to healthy females.
  • We observed significantly decreased SOD activity and GSH levels in patients belonging to clinical stage 4 as compared to those having stages 1, 2 or 3 of breast cancer.
  • Increased ADA activity in breast cancer patients has also been reported
  • The compromised antioxidant defence system produces the oxidative stress which in turn creates the inflammatory response shown by concomitant increased adenosine deaminase (ADA) activity in female patients.
  • Experimental and epidemiological evidences implicate the involvement of oxygen derived free radical in the pathogenesis of breast cancer.
  • Antioxidant status was highly depressed in advanced stages of breast cancer as compared to initial stage.
  • In the present study, significantly low GSH levels were observed in female patients of carcinoma breast as compared to normal females
  • Walia et al. (1995) reported increased ADA activity in breast cancer patients as compared to age matched normal subjects.
  • These free radicals are able to cause damage to membrane, mitochondria and macromolecules including proteins, lipids and DNA and actively take part in cell proliferation. This cascade in turn generates the inflammatory response and causes the progression of the disease.
  • increased oxidative stress gives rise to inflammation which could further aggravates the disease
  • Breast carcinoma involves a cascade of events that are highly inflammatory.
  • Marked oxidative stress in stage 4 of breast cancer indicated advancement of the disease, hence checking oxidative stress at initial stage could be helpful for controlling the progression of the disease.
  • They concluded that ADA is a better probable parameter for detection of breast cancer
  • Adenosine deaminase enzyme (ADA) catalyzes the conversion of adenosine to inosine which finally gets converted to uric acid
  • serum ADA activity tends to increase with advancing age,
  • Prevalence of oxidative stress gives rise to inflammation.
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    Study finds a reduction in SuperOxide Dismutase and Glutathione Perioxidase in advancing breast cancer.  Cancer is a high oxidative stress disease that results in inflammation, mitochondrial dysfunction and proliferation.  Adenosine Deaminase (ADA) is proposed to be another biomarker to assess tumor stage.  
fnfdoc

Dementia Stages And Symptoms Briefly Explained - Health Blog - 0 views

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    Here we discussed Dementia stages & symptoms. Dementia is a wider category of brain diseases. Long term memory loss causes Alzheimer's
Nathan Goodyear

Long-term treatment with the oncolytic ECHO-7 virus Rigvir of a melanoma stage IV M1c p... - 0 views

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    3 cases reports of the use of the oncolytic RIGVIR virus in stage III and stage IV disease.
Nathan Goodyear

FDG-PET/CT imaging biomarkers in head and neck squamous cell carcinoma - 0 views

  • F-fluoro-2-deoxyglucose (FDG) PET/CT is sensitive for the diagnosis and initial staging of several types of malignancies
  • SUV is a semiquantitative measure of the normalized concentration of radioactivity in a tumor or lesion
  • As FDG is the most common radiotracer used clinically and reflects tumor glucose metabolism, SUV is used as a surrogate marker for tumor metabolism.
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  • primary tumor SUVmax >10 predicted survival, independent of the tumor stage and diameter
  • advanced tumors tend to have higher FDG uptake (and thus higher SUV values)
  • the impact of the SUV on treatment outcome has been observed even within a given tumor stage
  • The association between FDG uptake and tumor burden or stage has been well documented
  • FDG uptake not only reflects tumor burden/stage but also expresses, at least in part, some intrinsic biologic characteristic(s) of the tumor
  • SUVmax reflects the highest voxel value within the ROI or VOI. It is the most widely used parameter to measure metabolic tumor activity in oncologic FDG-PET/CT imaging
  • Several studies suggest that primary tumor baseline SUVmax also has predictive value in assessing the tumor burden, lymph node involvement and local extension
  • According to EORTC, a drop (delta between baseline and post-therapy) of 15–25% in SUVmax may represent a good treatment response
  • PERCIST criteria was proposed by the investigators at the Johns Hopkins Medical Institutions and suggested that a decrease in SUV normalized to lean body mass of at least 30% should be achieved before considering partial tumor response
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    Good review of PET/CT scan and MaxSUV in head and neck cancers.
Nathan Goodyear

Activity of superoxide dismutase, catalase, glutathione peroxidase, and glutathione red... - 0 views

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    "Glutathione reductase activity is lower in all colorectal carcinoma groups than in control, and a significant decrease in glutathione reductase activity was obtained between patients in tumor stage II and III compared to tumor stage IV." Same is see with SOD in study.
Nathan Goodyear

Less Invasive Treatment is Associated with Improved Survival in Early Stage Breast Canc... - 0 views

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    better survival with lumpectomy and radiation versus mastectomy for early stage breast cancer.
Nathan Goodyear

Breast Cancer-Major changes in the American Joint Committee on Cancer eighth edition ca... - 0 views

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    8th edition of AJC breast cancer staging.
pharmacybiz

Paxlovid : MHRA Approves Second Oral Covid-19 Antiviral - 0 views

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    UK regulator has approved a second oral antiviral for early treatment of Covid-19 in high-risk adults, after molnupiravir. The Medicines and Healthcare products Regulatory Agency (MHRA) gave its nod for a new treatment called Paxlovid (PF-07321332 and ritonavir), after finding it safe and effective at reducing the risk of hospitalisation and death in people diagnosed with mild Covid-19 infection. Developed by Pfizer, Paxlovid prevents the multiplying of virus, helping the body to overcome the infection. A clinical trial for the treatment in high risk individuals revealed that a five-days course of Paxlovid reduces the risk of hospitalisation and death by 89 per cent. It further revealed that Paxlovid is most effective when taken in the early stage of infection. Dr June Raine, MHRA chief executive, said: "We now have a further antiviral medicine for the treatment of Covid-19 that can be taken by mouth rather than administered intravenously. This means it can be administered outside a hospital setting, before Covid-19 has progressed to a severe stage."
Nathan Goodyear

DASH (Dietary Approaches to Stop Hypertension) Diet Is Effective Treatment for Stage 1 ... - 0 views

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    DASH is effective as first-line therapy in those with stage I HTN
Nathan Goodyear

Androgen receptor expression is inversely correlated with pathologic tumor stage in bla... - 0 views

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    Study finds that loss of Androgen receptors associated with advanced stage bladder cancer in men.
star yu

Stage 4 Kidney Disease with 28% Kidney Function Can I Live Like a Normal Person-Shijiaz... - 0 views

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    Stage 4 kidney disease with 28% kidney function can i live like a normal person ? In general, people with only 28% kidney function have to live with dialysis for the rest of their life, but fortunately, in our days they can have a chance to
Nathan Goodyear

Nuclear TK1 expression is an independent prognostic factor for survival in pre-malignan... - 0 views

  • Thymidine kinase 1 (TK1) is a proliferation biomarker
  • Nuclear TK1 expression in early grade CIN predicts risk for progression to malignancy
  • Nuclear TK1 expression is also a prognostic factor for treatment outcome
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  • TK1 LI was found to be a more reliable prognostic marker for 5-year survival than pathological stages, FIGO stages and Ki-67,
  • nuclear TK1 expression is a reliable prognostic factor in CIN patients, a group of cervical lesion patients that respond positively to treatment
  • nuclear TK1 expression is correlated with advanced stage of invasive cervical carcinomas
  • a low TK1 LI can help to identify with a better survival
  • low TK1 expression in the tumors in these patients might indicate that these tumors have a lower proliferation rate
  • TK1 is a key kinase in the one-step salvage pathway by which thymidine is introduced into DNA via the salvage pathway
  • TK1 participates in DNA synthesis and is therefore closely related to the S-phase of the cell cycle, and is correlated with proliferation
  • TK1 intensity (TK1 synthesis rate) increases from CIN grade I to CIN grade III, but does not further increase in invasive cervical carcinomas.
  • TK1 intensity seems to be a prognostic factor particularly when pre-malignant cervical lesions progress to malignancy
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    TK-1 is a proliferation biomarker of DNA repair. TK-1 is a nuclear biomarker of cancer prognosis, survival, recurrence and predicts risk of progression of pre-malignant disease.
Nathan Goodyear

Implications of free radicals and antioxidant levels in carcinoma of the breast: A neve... - 0 views

  • Experimental investigations as well as clinical and epidemiological findings have provided evidence supporting the role of reactive oxygen metabolites or free radicals such as singlet oxygen O 2 - , superoxide anions (O 2 ), hydrogen peroxide (H­2 O2 ) and hydroxyl radical in the etiology of cancer.
  • Certain aldehydes such as Malonyldialdehyde (MDA), the end product of lipid peroxidation arising from free radical degeneration of polyunsaturated fatty acids can cause cross linking in lipids, proteins and nucleic acids leading to cellular damage.
  • In this study, patients with cancer exhibited higher levels of MDA, both in tissues and serum (p<0.001) compared to the control group [Table 1]. In tissue, the MDA level in stage IV was significantly higher as compared to stage I indicating increased free radical activity with increasing severity of cancer
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  • From these observations, it can be concluded that MDA levels play an important role in assessing the outcome of cancer
  • SOD and CAT are considered primary antioxidant enzymes, since they are involved in direct elimination of reactive oxygen metabolites. [13-16] They also act as anti-carcinogens and inhibitors at initiation and promotion/transformation stage in carcinogenesis
  • In our study, SOD and CAT levels were found to be low in all cancer patients as compared to controls
  • Fridovich and Tayarani have demonstrated in their respective studies that the reduction in SOD activity increases the toxic effects of O2 - and this might lead to severe cellular damage.
  • Mehrotra et al. in their study also observed high levels of MDA and low levels of SOD and CAT in patients of cancer cervix which is in sync with our observations.
  • strong evidence regarding the definitive role of free radicals in breast malignancy.
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    This study finds a strong correlation between advancing breast cancer, decreased catalase and SOD with increasing MDA.  The authors of this study conclude this is a key factor in carcinogenesis and not a by-product of cancer.  This flies in the face of traditional medicines fear of antioxidant therapy in cancer.
Nathan Goodyear

Clinical and serologic markers of stage and prognosis in small cell lung cancer. A mult... - 0 views

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    TK-1 useful in evaluation of disease stage and therapy efficacy. TK-1 was used in conduction with LDH, CEA, NSE, and TPA.
star yu

How to Avoid Dialysis for PKD Stage 3 Patients - 0 views

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    How to avoid dialysis for PKD stage 3 patients? As we all know, Polycystic Kidney Disease is a kind of genetic kidney disease, with the disease goes worse, doctors will recommend dialysis to patient.
wheelchairindia9

Portable Wheelchair Provides Stage AccessibilityPortable chair frames can be constructe... - 0 views

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    Portable chair frames can be constructed of either steel or aluminum and have weights anywhere from 15 lbs. and 45 lbs. depending on the model. All chairs will fold from side to side and some have folding back the make transporting and storage easier. Most chairs have weight capacity of 250 lbs. But the heavy duty models will hold up to about 450 lbs. Of course, a chair which will hold 450 lbs. Will be a much more heavily constructed and will push the weight towards the 45 lb. weight. The most common wheel configuration for portable chairs is four 8\" casters with solid tires. The front two casters will swivel to enable turning. On some models the rear two wheels may be 12\" in diameter instead of 8\" and have air tires insted of solid tires. The larger wheels will give a little bit softer ride and traverse rough terrain a little better. They fold up in interesting ways to collapse to the size of a suitcase when not in use and are usually large enough to cover one or two stairs when extended. It is important to consider their weight and the person who would most often be carrying the ramp and setting it up. Karma KM 2500 L Big Wheel Wheelchair Karma KM 2500 L Wheelchair Specifications Width 18" Front/Rear Wheels 6" to 22" Seat Width 47cm Seat Depth 40cm Overall Width 66cm Overall Collapsed Width 36cm Armrest Height 21cm Overall Length 90cm Seat Height 47cm Backrest Height 38cm Overall Height 86cm Weight 11.kg Karma KM 2500 L Wheelchair Seat and Back AEGIS Microbe Shield Approved by the FDA, EPA, EU, etc., bonded anti-microbial barrier upholstery protects from odor, staining and deterioration from bacteria, fungus and other microorganisms. It is a shield for your health. Karma KM 2500 L Wheelchair Extended Armrest By simulating the natural position of arms, the extended armrest design is ergonomic and creates bigger seating space. An Ultra lightweight wheelchair (11 kg) with a compact design for either attendant assisted or
Nathan Goodyear

Dietary Insulin Load and Cancer Recurrence and Survival in Patients With Stage III Colo... - 0 views

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    New prospective study of 1023 patients finds that high-insulogenic diet, also know as a traditional American diet, high glycemic, high sugar diet... is associated with an increased risk of cancer recurrence and mortality compared to low insulogenic diet.  The authors concluded that this would be beneficial for after surgical resection in people with stage III colon cancer. My question, is why wait on the development of cancer: use a low-insulogenic diet to prevent the cancer all together or when diagnosed implement immediately.  Why wait? Treat early! Prevent!
fnfdoc

COPD: Stages, Causes, Symptoms And Treatment - Health Blog - 0 views

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    COPD consists of multiple lung infections and is considered incurable by most physicians. Can timely diagnosis, on the bright side, slow down its progress?
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    COPD consists of multiple lung infections and is considered incurable by most physicians. Can timely diagnosis, on the bright side, slow down its progress?
Nathan Goodyear

Immune responses to malignancies - 0 views

  • increased densities of T-cell infiltrates with a high proportion of CD8+ T cells within primary colorectal carcinomas were associated with a significant protection against tumor recurrence
  • coexpression of genes mediating cytotoxicity and TH1 adaptive immune responses accurately predicted survival in patients with colorectal carcinoma independently of the metastatic status.
  • tumor-specific cytolytic T lymphocytes (CTLs)
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  • tumor-associated antigens (TAs)
  • Proinflammatory cytokines secreted by inflammatory cells can contribute to tumor progression, and soluble factors produced by the tumor in response to nonspecific or tumor-specific signals, such as prostaglandin E2 (PGE2), adenosine, or TGF-β, downregulate functions of immune cells
  • they are largely ineffective in arresting tumor growth, although they can proliferate and mediate antitumor cytotoxicity on their removal from the tumor bed and ex vivo IL-2 activation.42
  • DCs (HLA-DR+CD86+CD80+CD14−) are nature’s best APCs
  • They are a common component of tumor immune infiltrates and are responsible for the uptake, processing, and cross-presentation of TAs to naive or memory T cells, thus playing a crucial role in the generation of tumor-specific effector T cells
  • DCs control the induction of Treg cells. In patients with cancer, cellular interactions between antigen-presenting DCs and T cells lead to expansion and accumulation of Treg cells at the tumor site and in the periphery
  • NK cells (CD3−CD56+CD16+), which mediate innate immunity and contain both perforin-rich and granzyme-rich granules, are well equipped to mediate lysis of tumor cells
  • B cells (CD19+, CD20+) are also rare in most human tumors, with the exception of breast cancer and melanoma
  • The initial acute inflammation involving the recruitment and influx of antitumor effector cells is replaced by chronic inflammation in later stages of tumor progression
  • Tissue hypoxia plays a major role in shaping the nature of immune infiltrates in tumors
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    Another great review of the immune system during different stages of carcinogenesis; how the cancer manipulates the immue system to cloak itself from the immune system.
Nathan Goodyear

Mice lacking progesterone receptor exhibit pleiotropic reproductive abnormalities. - 0 views

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    study shows that mice lacking PR-A and PR-B (progesterone receptors) have increased uterine inflammation.   Again, the inflammatory/pro-inflammatory effects of hormones may be regulated through receptors.  This may be the reason that different stages of life elicit a different response with the same hormone.
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