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Mechanism of Cisplatin Anti-Cancer Drug
Mechanism of Cisplatin Anti-Cancer Drug Scott Stevens 16,952 Views • 2 years ago

Cisplatin is in a class of drugs known as platinum-containing compounds used to treat various types of cancers including metastatic testicular and ovarian tumors. The molecule was first discovered in 1845, but did not receive FDA approval until 1978. Today it is known as the "penicillin of cancer drugs," because it is so effective for many different cancers. There are three key players involved in Cisplatin's mechanism: (1) Cisplatin, (2) DNA (3) and an HMG Protein. Most Cisplatin enters the body through active transport, but some molecules are passively defused through the cell membrane. Once in the nucleus, Cisplatin can form an adduct with two consecutive guanine bases within a strand of DNA. The molecule loses its chlorine atoms in exchange for the nitrogen atoms of the target guanines. Cisplatin can bond more tightly with nitrogen because nitrogen balances the platinum charge more effectively than chlorine. It is this adduct-induced DNA bend that allows binding of proteins which contain the high mobility group, HMG domain. Once the protein is bound to the DNA, it inserts a wedge-like phenyl group of phenylalanine 37 into the widened minor groove created by the bend. The tightly bound HMG protein causes destacking of the nucleotide bases, resulting in the DNA helix becoming kinked. In this way, Cisplatin can be thought of as a monkey wrench in the DNA repair system. With the HMG protein bound to the DNA, the modified strand is not repaired properly and so the cell dies. The success of Cisplatin depends on its ratio of efficacy between cancerous and healthy cells.

Carpal Tunnel Syndrome Information
Carpal Tunnel Syndrome Information Scott Stevens 10,206 Views • 2 years ago

Carpal Tunnel Syndrome Information

Giant Swollen Leg Elephantiasis Filariasis
Giant Swollen Leg Elephantiasis Filariasis Scott Stevens 8,764 Views • 2 years ago

Giant Swollen Leg Elephantiasis Filariasis

Tummy Tuck Surgery
Tummy Tuck Surgery Scott 3,611 Views • 2 years ago

Tummy tuck surgery, also known as abdominoplasty, removes excess fat and skin and, in most cases, restores weakened or separated muscles creating an abdominal profile that is smoother and firmer. A flat and well-toned abdomen is something many of us strive for through exercise and weight control. Sometimes these methods cannot achieve our goals. Even individuals of otherwise normal body weight and proportion can develop an abdomen that protrudes or is loose and sagging. The most common causes of this include: Aging Heredity Pregnancy Prior surgery Significant fluctuations in weight What tummy tuck surgery can't do A tummy tuck is not a substitute for weight loss or an appropriate exercise program. Although the results of a tummy tuck are technically permanent, the positive outcome can be greatly diminished by significant fluctuations in your weight. For this reason, individuals who are planning substantial weight loss or women who may be considering future pregnancies would be advised to postpone a tummy tuck. A tummy tuck cannot correct stretch marks, although these may be removed or somewhat improved if they are located on the areas of excess skin that will be excised.

Insertion of Spanner Prostatic Stent
Insertion of Spanner Prostatic Stent Medical_Videos 9,721 Views • 2 years ago

Insertion of Spanner Prostatic Stent

How to treat acne scars?
How to treat acne scars? samer kareem 3,231 Views • 2 years ago

The first step is to see if you have pigmentation issues -not really classed as acne scars, but this is controversial, or if you have contour changes. The best thing to do is to examine under tangential or angled lighting, as this will reveal all. Once this is done, scars can be subtyped and mapped, with high resolution photos. The second aspect, which is equally as important is to examine scars upon animanation, namely when you speak, smile and move your face. This will give me an idea of the amount of tethering and anchored acne scars. Time and time again I get request for ‘what is the treatment’ with static photos, an impossible task to answer correctly. Acne scar assessment has to be done live- with the patient in front of you, and lighting from all angles. Photos do not map scars as well a real time examination under magnification and lighting.

Anatomy of The Pharynx
Anatomy of The Pharynx Anatomy_Videos 7,420 Views • 2 years ago

Anatomy of The Pharynx

Histology of Trachea
Histology of Trachea Histology 6,075 Views • 2 years ago

Histology of Trachea

Ventral Hernia Repair
Ventral Hernia Repair samer kareem 10,689 Views • 2 years ago

Ventral Hernia Repair

Cosmetic Eye and Eyelid Surgery
Cosmetic Eye and Eyelid Surgery samer kareem 15,990 Views • 2 years ago

Cosmetic Eye and Eyelid Surgery

Deviated nasal septum
Deviated nasal septum samer kareem 1,622 Views • 2 years ago

A deviated septum occurs when the thin wall (nasal septum) between your nasal passages is displaced to one side. In many people, the nasal septum is displaced — or deviated — making one nasal passage smaller. When a deviated septum is severe, it can block one side of your nose and reduce airflow, causing difficulty breathing. The additional exposure of a deviated septum to the drying effect of airflow through the nose may sometimes contribute to crusting or bleeding in certain individuals. Nasal obstruction can occur from a deviated nasal septum, from swelling of the tissues lining the nose, or from both. Treatment of nasal obstruction may include medications to reduce the swelling or nasal dilators that help open the nasal passages. To correct a deviated septum, surgery is necessary.

Alzheimer’s Disease Treatment (The Latest Updates)
Alzheimer’s Disease Treatment (The Latest Updates) samer kareem 4,014 Views • 2 years ago

Three cholinesterase inhibitors are commonly prescribed: Donepezil (Aricept) is approved to treat all stages of Alzheimer's. Rivastigmine (Exelon) is approved to treat mild to moderate Alzheimer's. Galantamine (Razadyne) is approved to treat mild to moderate Alzheimer's. Currently, there is no cure for Alzheimer's. But drug and non-drug treatments may help with both cognitive and behavioral symptoms. Researchers are looking for new treatments to alter the course of the disease and improve the quality of life for people with dementia. ... Medications for Memory Loss.

Baby born without brain
Baby born without brain samer kareem 11,560 Views • 2 years ago

Baby born without brain

Addison's disease: causes, diagnosis and treatment
Addison's disease: causes, diagnosis and treatment samer kareem 1,377 Views • 2 years ago

A detailed description of Adrenal insufficiency (Addison's disease) including basic physiology of the HPA axis, causes of primary and secondary insufficiency, clinical features of acute and chronic adrenal insufficiency. Lab testing for Addison's disease is also dealt with in detail. The management, both short term and long term are discussed in detail.

Neonatal Resuscitation
Neonatal Resuscitation samer kareem 28,056 Views • 2 years ago

The following guidelines are an interpretation of the evidence presented in the 2010 International Consensus on Cardiopulmonary Resuscitation and Emergency Cardiovascular Care Science With Treatment Recommendations1). They apply primarily to newly born infants undergoing transition from intrauterine to extrauterine life, but the recommendations are also applicable to neonates who have completed perinatal transition and require resuscitation during the first few weeks to months following birth. Practitioners who resuscitate infants at birth or at any time during the initial hospital admission should consider following these guidelines. For the purposes of these guidelines, the terms newborn and neonate are intended to apply to any infant during the initial hospitalization. The term newly born is intended to apply specifically to an infant at the time of birth.

Laparoscopic repair of iatrogenic injury of the right ureter
Laparoscopic repair of iatrogenic injury of the right ureter samer kareem 8,092 Views • 2 years ago

Iatrogenic injury to the ureter is a potentially devastating complication of modern surgery. The ureters are most often injured in gynecologic, colorectal, and vascular pelvic surgery. There is also potential for considerable ureteral injury during endoscopic procedures for ureteric pathology such as tumor or lithiasis. While maneuvers such as perioperative stenting have been touted as a means to avoid ureteral injury, these techniques have not been adopted universally, and the available literature does not make a case for their routine use. Distal ureteral injuries are best managed with ureteroneocystostomy with or without a vesico-psoas hitch. Mid-ureteral and proximal ureteral injuries can potentially be managed with ureteroureterostomy. If the distal segment is unsuitable for anastomosis then a number of techniques are available for repair including a Boari tubularized bladder flap, transureteroureterostomy, or renal autotransplantation. In rare cases renal autotransplantation or ureteral substitution with gastrointestinal segments may be warranted to re-establish urinary tract continuity. Laparoscopic and minimally invasive techniques have been employed to remedy iatrogenic ureteral injuries.

Where the local celebrities go  Sugar Land Dental
Where the local celebrities go Sugar Land Dental Paul Cash 1,260 Views • 2 years ago

Celebrity hair stylist Michael DeMarse of Houston, TX shares his experience with us. Michael has been a loyal patient of Dr. Jue for a long time! Call us for a free consultation at (281) 277-9200 or visit https://www.sugarlanddentalspa.com/

Caisson's disease.
Caisson's disease. samer kareem 13,360 Views • 2 years ago

They were victims of caisson disease. This condition, also known as the bends or decompression sickness, is caused by the formation of gas bubbles in the body. Human body tissues contain small amounts of the gases present in the air.

Thyroid Cancer
Thyroid Cancer samer kareem 6,712 Views • 2 years ago

Thyroid cancer is a disease that you get when abnormal cells begin to grow in your thyroid gland . The thyroid gland is shaped like a butterfly and is located in the front of your neck. It makes hormones that regulate the way your body uses energy and that help your body work normally.

new sepsis definitions
new sepsis definitions samer kareem 8,377 Views • 2 years ago

new sepsis definitions

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